panic when an extension request is issued before an extension has been initialized. but give a nice error message for the happy people.

29 files changed, 2876 insertions, 202 deletions

diff --git a/nexgb/bigreq/bigreq.go b/nexgb/bigreq/bigreq.go
index 32dacba..43a15a4 100644
--- a/nexgb/bigreq/bigreq.go
+++ b/nexgb/bigreq/bigreq.go
@@ -2,7 +2,7 @@
 package bigreq
 
 /*
-	This file was generated by bigreq.xml on May 11 2012 1:58:35am EDT.
+	This file was generated by bigreq.xml on May 11 2012 11:57:18pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -40,6 +40,10 @@ func init() {
 	xgb.NewExtErrorFuncs["BIG-REQUESTS"] = make(map[int]xgb.NewErrorFun)
 }
 
+// Skipping definition for base type 'Bool'
+
+// Skipping definition for base type 'Float'
+
 // Skipping definition for base type 'Card8'
 
 // Skipping definition for base type 'Int16'
@@ -60,10 +64,6 @@ func init() {
 
 // Skipping definition for base type 'Double'
 
-// Skipping definition for base type 'Bool'
-
-// Skipping definition for base type 'Float'
-
 // EnableCookie is a cookie used only for Enable requests.
 type EnableCookie struct {
 	*xgb.Cookie
@@ -72,6 +72,9 @@ type EnableCookie struct {
 // Enable sends a checked request.
 // If an error occurs, it will be returned with the reply by calling EnableCookie.Reply()
 func Enable(c *xgb.Conn) EnableCookie {
+	if _, ok := c.Extensions["BIG-REQUESTS"]; !ok {
+		panic("Cannot issue request 'Enable' using the uninitialized extension 'BIG-REQUESTS'. bigreq.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(enableRequest(c), cookie)
 	return EnableCookie{cookie}
@@ -80,6 +83,9 @@ func Enable(c *xgb.Conn) EnableCookie {
 // EnableUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func EnableUnchecked(c *xgb.Conn) EnableCookie {
+	if _, ok := c.Extensions["BIG-REQUESTS"]; !ok {
+		panic("Cannot issue request 'Enable' using the uninitialized extension 'BIG-REQUESTS'. bigreq.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(enableRequest(c), cookie)
 	return EnableCookie{cookie}
diff --git a/nexgb/composite/composite.go b/nexgb/composite/composite.go
index 4217736..68e8dbe 100644
--- a/nexgb/composite/composite.go
+++ b/nexgb/composite/composite.go
@@ -2,7 +2,7 @@
 package composite
 
 /*
-	This file was generated by composite.xml on May 11 2012 1:58:35am EDT.
+	This file was generated by composite.xml on May 11 2012 11:57:18pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -41,6 +41,16 @@ func init() {
 	xgb.NewExtErrorFuncs["Composite"] = make(map[int]xgb.NewErrorFun)
 }
 
+// Skipping definition for base type 'Int16'
+
+// Skipping definition for base type 'Int32'
+
+// Skipping definition for base type 'Void'
+
+// Skipping definition for base type 'Byte'
+
+// Skipping definition for base type 'Int8'
+
 // Skipping definition for base type 'Card16'
 
 // Skipping definition for base type 'Char'
@@ -55,16 +65,6 @@ func init() {
 
 // Skipping definition for base type 'Card8'
 
-// Skipping definition for base type 'Int16'
-
-// Skipping definition for base type 'Int32'
-
-// Skipping definition for base type 'Void'
-
-// Skipping definition for base type 'Byte'
-
-// Skipping definition for base type 'Int8'
-
 const (
 	RedirectAutomatic = 0
 	RedirectManual    = 1
@@ -78,6 +78,9 @@ type QueryVersionCookie struct {
 // QueryVersion sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryVersionCookie.Reply()
 func QueryVersion(c *xgb.Conn, ClientMajorVersion uint32, ClientMinorVersion uint32) QueryVersionCookie {
+	if _, ok := c.Extensions["COMPOSITE"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'Composite'. composite.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryVersionRequest(c, ClientMajorVersion, ClientMinorVersion), cookie)
 	return QueryVersionCookie{cookie}
@@ -86,6 +89,9 @@ func QueryVersion(c *xgb.Conn, ClientMajorVersion uint32, ClientMinorVersion uin
 // QueryVersionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryVersionUnchecked(c *xgb.Conn, ClientMajorVersion uint32, ClientMinorVersion uint32) QueryVersionCookie {
+	if _, ok := c.Extensions["COMPOSITE"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'Composite'. composite.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryVersionRequest(c, ClientMajorVersion, ClientMinorVersion), cookie)
 	return QueryVersionCookie{cookie}
@@ -170,6 +176,9 @@ type RedirectWindowCookie struct {
 // RedirectWindow sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func RedirectWindow(c *xgb.Conn, Window xproto.Window, Update byte) RedirectWindowCookie {
+	if _, ok := c.Extensions["COMPOSITE"]; !ok {
+		panic("Cannot issue request 'RedirectWindow' using the uninitialized extension 'Composite'. composite.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(redirectWindowRequest(c, Window, Update), cookie)
 	return RedirectWindowCookie{cookie}
@@ -178,6 +187,9 @@ func RedirectWindow(c *xgb.Conn, Window xproto.Window, Update byte) RedirectWind
 // RedirectWindowChecked sends a checked request.
 // If an error occurs, it can be retrieved using RedirectWindowCookie.Check()
 func RedirectWindowChecked(c *xgb.Conn, Window xproto.Window, Update byte) RedirectWindowCookie {
+	if _, ok := c.Extensions["COMPOSITE"]; !ok {
+		panic("Cannot issue request 'RedirectWindow' using the uninitialized extension 'Composite'. composite.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(redirectWindowRequest(c, Window, Update), cookie)
 	return RedirectWindowCookie{cookie}
@@ -224,6 +236,9 @@ type RedirectSubwindowsCookie struct {
 // RedirectSubwindows sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func RedirectSubwindows(c *xgb.Conn, Window xproto.Window, Update byte) RedirectSubwindowsCookie {
+	if _, ok := c.Extensions["COMPOSITE"]; !ok {
+		panic("Cannot issue request 'RedirectSubwindows' using the uninitialized extension 'Composite'. composite.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(redirectSubwindowsRequest(c, Window, Update), cookie)
 	return RedirectSubwindowsCookie{cookie}
@@ -232,6 +247,9 @@ func RedirectSubwindows(c *xgb.Conn, Window xproto.Window, Update byte) Redirect
 // RedirectSubwindowsChecked sends a checked request.
 // If an error occurs, it can be retrieved using RedirectSubwindowsCookie.Check()
 func RedirectSubwindowsChecked(c *xgb.Conn, Window xproto.Window, Update byte) RedirectSubwindowsCookie {
+	if _, ok := c.Extensions["COMPOSITE"]; !ok {
+		panic("Cannot issue request 'RedirectSubwindows' using the uninitialized extension 'Composite'. composite.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(redirectSubwindowsRequest(c, Window, Update), cookie)
 	return RedirectSubwindowsCookie{cookie}
@@ -278,6 +296,9 @@ type UnredirectWindowCookie struct {
 // UnredirectWindow sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func UnredirectWindow(c *xgb.Conn, Window xproto.Window, Update byte) UnredirectWindowCookie {
+	if _, ok := c.Extensions["COMPOSITE"]; !ok {
+		panic("Cannot issue request 'UnredirectWindow' using the uninitialized extension 'Composite'. composite.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(unredirectWindowRequest(c, Window, Update), cookie)
 	return UnredirectWindowCookie{cookie}
@@ -286,6 +307,9 @@ func UnredirectWindow(c *xgb.Conn, Window xproto.Window, Update byte) Unredirect
 // UnredirectWindowChecked sends a checked request.
 // If an error occurs, it can be retrieved using UnredirectWindowCookie.Check()
 func UnredirectWindowChecked(c *xgb.Conn, Window xproto.Window, Update byte) UnredirectWindowCookie {
+	if _, ok := c.Extensions["COMPOSITE"]; !ok {
+		panic("Cannot issue request 'UnredirectWindow' using the uninitialized extension 'Composite'. composite.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(unredirectWindowRequest(c, Window, Update), cookie)
 	return UnredirectWindowCookie{cookie}
@@ -332,6 +356,9 @@ type UnredirectSubwindowsCookie struct {
 // UnredirectSubwindows sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func UnredirectSubwindows(c *xgb.Conn, Window xproto.Window, Update byte) UnredirectSubwindowsCookie {
+	if _, ok := c.Extensions["COMPOSITE"]; !ok {
+		panic("Cannot issue request 'UnredirectSubwindows' using the uninitialized extension 'Composite'. composite.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(unredirectSubwindowsRequest(c, Window, Update), cookie)
 	return UnredirectSubwindowsCookie{cookie}
@@ -340,6 +367,9 @@ func UnredirectSubwindows(c *xgb.Conn, Window xproto.Window, Update byte) Unredi
 // UnredirectSubwindowsChecked sends a checked request.
 // If an error occurs, it can be retrieved using UnredirectSubwindowsCookie.Check()
 func UnredirectSubwindowsChecked(c *xgb.Conn, Window xproto.Window, Update byte) UnredirectSubwindowsCookie {
+	if _, ok := c.Extensions["COMPOSITE"]; !ok {
+		panic("Cannot issue request 'UnredirectSubwindows' using the uninitialized extension 'Composite'. composite.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(unredirectSubwindowsRequest(c, Window, Update), cookie)
 	return UnredirectSubwindowsCookie{cookie}
@@ -386,6 +416,9 @@ type CreateRegionFromBorderClipCookie struct {
 // CreateRegionFromBorderClip sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateRegionFromBorderClip(c *xgb.Conn, Region xfixes.Region, Window xproto.Window) CreateRegionFromBorderClipCookie {
+	if _, ok := c.Extensions["COMPOSITE"]; !ok {
+		panic("Cannot issue request 'CreateRegionFromBorderClip' using the uninitialized extension 'Composite'. composite.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createRegionFromBorderClipRequest(c, Region, Window), cookie)
 	return CreateRegionFromBorderClipCookie{cookie}
@@ -394,6 +427,9 @@ func CreateRegionFromBorderClip(c *xgb.Conn, Region xfixes.Region, Window xproto
 // CreateRegionFromBorderClipChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreateRegionFromBorderClipCookie.Check()
 func CreateRegionFromBorderClipChecked(c *xgb.Conn, Region xfixes.Region, Window xproto.Window) CreateRegionFromBorderClipCookie {
+	if _, ok := c.Extensions["COMPOSITE"]; !ok {
+		panic("Cannot issue request 'CreateRegionFromBorderClip' using the uninitialized extension 'Composite'. composite.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createRegionFromBorderClipRequest(c, Region, Window), cookie)
 	return CreateRegionFromBorderClipCookie{cookie}
@@ -438,6 +474,9 @@ type NameWindowPixmapCookie struct {
 // NameWindowPixmap sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func NameWindowPixmap(c *xgb.Conn, Window xproto.Window, Pixmap xproto.Pixmap) NameWindowPixmapCookie {
+	if _, ok := c.Extensions["COMPOSITE"]; !ok {
+		panic("Cannot issue request 'NameWindowPixmap' using the uninitialized extension 'Composite'. composite.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(nameWindowPixmapRequest(c, Window, Pixmap), cookie)
 	return NameWindowPixmapCookie{cookie}
@@ -446,6 +485,9 @@ func NameWindowPixmap(c *xgb.Conn, Window xproto.Window, Pixmap xproto.Pixmap) N
 // NameWindowPixmapChecked sends a checked request.
 // If an error occurs, it can be retrieved using NameWindowPixmapCookie.Check()
 func NameWindowPixmapChecked(c *xgb.Conn, Window xproto.Window, Pixmap xproto.Pixmap) NameWindowPixmapCookie {
+	if _, ok := c.Extensions["COMPOSITE"]; !ok {
+		panic("Cannot issue request 'NameWindowPixmap' using the uninitialized extension 'Composite'. composite.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(nameWindowPixmapRequest(c, Window, Pixmap), cookie)
 	return NameWindowPixmapCookie{cookie}
@@ -490,6 +532,9 @@ type GetOverlayWindowCookie struct {
 // GetOverlayWindow sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetOverlayWindowCookie.Reply()
 func GetOverlayWindow(c *xgb.Conn, Window xproto.Window) GetOverlayWindowCookie {
+	if _, ok := c.Extensions["COMPOSITE"]; !ok {
+		panic("Cannot issue request 'GetOverlayWindow' using the uninitialized extension 'Composite'. composite.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getOverlayWindowRequest(c, Window), cookie)
 	return GetOverlayWindowCookie{cookie}
@@ -498,6 +543,9 @@ func GetOverlayWindow(c *xgb.Conn, Window xproto.Window) GetOverlayWindowCookie
 // GetOverlayWindowUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetOverlayWindowUnchecked(c *xgb.Conn, Window xproto.Window) GetOverlayWindowCookie {
+	if _, ok := c.Extensions["COMPOSITE"]; !ok {
+		panic("Cannot issue request 'GetOverlayWindow' using the uninitialized extension 'Composite'. composite.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getOverlayWindowRequest(c, Window), cookie)
 	return GetOverlayWindowCookie{cookie}
@@ -575,6 +623,9 @@ type ReleaseOverlayWindowCookie struct {
 // ReleaseOverlayWindow sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ReleaseOverlayWindow(c *xgb.Conn, Window xproto.Window) ReleaseOverlayWindowCookie {
+	if _, ok := c.Extensions["COMPOSITE"]; !ok {
+		panic("Cannot issue request 'ReleaseOverlayWindow' using the uninitialized extension 'Composite'. composite.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(releaseOverlayWindowRequest(c, Window), cookie)
 	return ReleaseOverlayWindowCookie{cookie}
@@ -583,6 +634,9 @@ func ReleaseOverlayWindow(c *xgb.Conn, Window xproto.Window) ReleaseOverlayWindo
 // ReleaseOverlayWindowChecked sends a checked request.
 // If an error occurs, it can be retrieved using ReleaseOverlayWindowCookie.Check()
 func ReleaseOverlayWindowChecked(c *xgb.Conn, Window xproto.Window) ReleaseOverlayWindowCookie {
+	if _, ok := c.Extensions["COMPOSITE"]; !ok {
+		panic("Cannot issue request 'ReleaseOverlayWindow' using the uninitialized extension 'Composite'. composite.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(releaseOverlayWindowRequest(c, Window), cookie)
 	return ReleaseOverlayWindowCookie{cookie}
diff --git a/nexgb/damage/damage.go b/nexgb/damage/damage.go
index a3ba928..f9aee61 100644
--- a/nexgb/damage/damage.go
+++ b/nexgb/damage/damage.go
@@ -2,7 +2,7 @@
 package damage
 
 /*
-	This file was generated by damage.xml on May 11 2012 1:58:35am EDT.
+	This file was generated by damage.xml on May 11 2012 11:57:19pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -41,18 +41,6 @@ func init() {
 	xgb.NewExtErrorFuncs["DAMAGE"] = make(map[int]xgb.NewErrorFun)
 }
 
-// Skipping definition for base type 'Card16'
-
-// Skipping definition for base type 'Char'
-
-// Skipping definition for base type 'Card32'
-
-// Skipping definition for base type 'Double'
-
-// Skipping definition for base type 'Bool'
-
-// Skipping definition for base type 'Float'
-
 // Skipping definition for base type 'Card8'
 
 // Skipping definition for base type 'Int16'
@@ -65,6 +53,18 @@ func init() {
 
 // Skipping definition for base type 'Int8'
 
+// Skipping definition for base type 'Card16'
+
+// Skipping definition for base type 'Char'
+
+// Skipping definition for base type 'Card32'
+
+// Skipping definition for base type 'Double'
+
+// Skipping definition for base type 'Bool'
+
+// Skipping definition for base type 'Float'
+
 const (
 	ReportLevelRawRectangles   = 0
 	ReportLevelDeltaRectangles = 1
@@ -238,6 +238,9 @@ type QueryVersionCookie struct {
 // QueryVersion sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryVersionCookie.Reply()
 func QueryVersion(c *xgb.Conn, ClientMajorVersion uint32, ClientMinorVersion uint32) QueryVersionCookie {
+	if _, ok := c.Extensions["DAMAGE"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'DAMAGE'. damage.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryVersionRequest(c, ClientMajorVersion, ClientMinorVersion), cookie)
 	return QueryVersionCookie{cookie}
@@ -246,6 +249,9 @@ func QueryVersion(c *xgb.Conn, ClientMajorVersion uint32, ClientMinorVersion uin
 // QueryVersionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryVersionUnchecked(c *xgb.Conn, ClientMajorVersion uint32, ClientMinorVersion uint32) QueryVersionCookie {
+	if _, ok := c.Extensions["DAMAGE"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'DAMAGE'. damage.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryVersionRequest(c, ClientMajorVersion, ClientMinorVersion), cookie)
 	return QueryVersionCookie{cookie}
@@ -330,6 +336,9 @@ type CreateCookie struct {
 // Create sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func Create(c *xgb.Conn, Damage Damage, Drawable xproto.Drawable, Level byte) CreateCookie {
+	if _, ok := c.Extensions["DAMAGE"]; !ok {
+		panic("Cannot issue request 'Create' using the uninitialized extension 'DAMAGE'. damage.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createRequest(c, Damage, Drawable, Level), cookie)
 	return CreateCookie{cookie}
@@ -338,6 +347,9 @@ func Create(c *xgb.Conn, Damage Damage, Drawable xproto.Drawable, Level byte) Cr
 // CreateChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreateCookie.Check()
 func CreateChecked(c *xgb.Conn, Damage Damage, Drawable xproto.Drawable, Level byte) CreateCookie {
+	if _, ok := c.Extensions["DAMAGE"]; !ok {
+		panic("Cannot issue request 'Create' using the uninitialized extension 'DAMAGE'. damage.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createRequest(c, Damage, Drawable, Level), cookie)
 	return CreateCookie{cookie}
@@ -387,6 +399,9 @@ type DestroyCookie struct {
 // Destroy sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func Destroy(c *xgb.Conn, Damage Damage) DestroyCookie {
+	if _, ok := c.Extensions["DAMAGE"]; !ok {
+		panic("Cannot issue request 'Destroy' using the uninitialized extension 'DAMAGE'. damage.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(destroyRequest(c, Damage), cookie)
 	return DestroyCookie{cookie}
@@ -395,6 +410,9 @@ func Destroy(c *xgb.Conn, Damage Damage) DestroyCookie {
 // DestroyChecked sends a checked request.
 // If an error occurs, it can be retrieved using DestroyCookie.Check()
 func DestroyChecked(c *xgb.Conn, Damage Damage) DestroyCookie {
+	if _, ok := c.Extensions["DAMAGE"]; !ok {
+		panic("Cannot issue request 'Destroy' using the uninitialized extension 'DAMAGE'. damage.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(destroyRequest(c, Damage), cookie)
 	return DestroyCookie{cookie}
@@ -436,6 +454,9 @@ type SubtractCookie struct {
 // Subtract sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func Subtract(c *xgb.Conn, Damage Damage, Repair xfixes.Region, Parts xfixes.Region) SubtractCookie {
+	if _, ok := c.Extensions["DAMAGE"]; !ok {
+		panic("Cannot issue request 'Subtract' using the uninitialized extension 'DAMAGE'. damage.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(subtractRequest(c, Damage, Repair, Parts), cookie)
 	return SubtractCookie{cookie}
@@ -444,6 +465,9 @@ func Subtract(c *xgb.Conn, Damage Damage, Repair xfixes.Region, Parts xfixes.Reg
 // SubtractChecked sends a checked request.
 // If an error occurs, it can be retrieved using SubtractCookie.Check()
 func SubtractChecked(c *xgb.Conn, Damage Damage, Repair xfixes.Region, Parts xfixes.Region) SubtractCookie {
+	if _, ok := c.Extensions["DAMAGE"]; !ok {
+		panic("Cannot issue request 'Subtract' using the uninitialized extension 'DAMAGE'. damage.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(subtractRequest(c, Damage, Repair, Parts), cookie)
 	return SubtractCookie{cookie}
@@ -491,6 +515,9 @@ type AddCookie struct {
 // Add sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func Add(c *xgb.Conn, Drawable xproto.Drawable, Region xfixes.Region) AddCookie {
+	if _, ok := c.Extensions["DAMAGE"]; !ok {
+		panic("Cannot issue request 'Add' using the uninitialized extension 'DAMAGE'. damage.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(addRequest(c, Drawable, Region), cookie)
 	return AddCookie{cookie}
@@ -499,6 +526,9 @@ func Add(c *xgb.Conn, Drawable xproto.Drawable, Region xfixes.Region) AddCookie
 // AddChecked sends a checked request.
 // If an error occurs, it can be retrieved using AddCookie.Check()
 func AddChecked(c *xgb.Conn, Drawable xproto.Drawable, Region xfixes.Region) AddCookie {
+	if _, ok := c.Extensions["DAMAGE"]; !ok {
+		panic("Cannot issue request 'Add' using the uninitialized extension 'DAMAGE'. damage.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(addRequest(c, Drawable, Region), cookie)
 	return AddCookie{cookie}
diff --git a/nexgb/dpms/dpms.go b/nexgb/dpms/dpms.go
index 8ffb2ee..d1142ce 100644
--- a/nexgb/dpms/dpms.go
+++ b/nexgb/dpms/dpms.go
@@ -2,7 +2,7 @@
 package dpms
 
 /*
-	This file was generated by dpms.xml on May 11 2012 1:58:35am EDT.
+	This file was generated by dpms.xml on May 11 2012 11:57:19pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -40,14 +40,6 @@ func init() {
 	xgb.NewExtErrorFuncs["DPMS"] = make(map[int]xgb.NewErrorFun)
 }
 
-// Skipping definition for base type 'Int8'
-
-// Skipping definition for base type 'Card16'
-
-// Skipping definition for base type 'Char'
-
-// Skipping definition for base type 'Card32'
-
 // Skipping definition for base type 'Double'
 
 // Skipping definition for base type 'Bool'
@@ -64,6 +56,14 @@ func init() {
 
 // Skipping definition for base type 'Byte'
 
+// Skipping definition for base type 'Int8'
+
+// Skipping definition for base type 'Card16'
+
+// Skipping definition for base type 'Char'
+
+// Skipping definition for base type 'Card32'
+
 const (
 	DPMSModeOn      = 0
 	DPMSModeStandby = 1
@@ -79,6 +79,9 @@ type GetVersionCookie struct {
 // GetVersion sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetVersionCookie.Reply()
 func GetVersion(c *xgb.Conn, ClientMajorVersion uint16, ClientMinorVersion uint16) GetVersionCookie {
+	if _, ok := c.Extensions["DPMS"]; !ok {
+		panic("Cannot issue request 'GetVersion' using the uninitialized extension 'DPMS'. dpms.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getVersionRequest(c, ClientMajorVersion, ClientMinorVersion), cookie)
 	return GetVersionCookie{cookie}
@@ -87,6 +90,9 @@ func GetVersion(c *xgb.Conn, ClientMajorVersion uint16, ClientMinorVersion uint1
 // GetVersionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetVersionUnchecked(c *xgb.Conn, ClientMajorVersion uint16, ClientMinorVersion uint16) GetVersionCookie {
+	if _, ok := c.Extensions["DPMS"]; !ok {
+		panic("Cannot issue request 'GetVersion' using the uninitialized extension 'DPMS'. dpms.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getVersionRequest(c, ClientMajorVersion, ClientMinorVersion), cookie)
 	return GetVersionCookie{cookie}
@@ -168,6 +174,9 @@ type CapableCookie struct {
 // Capable sends a checked request.
 // If an error occurs, it will be returned with the reply by calling CapableCookie.Reply()
 func Capable(c *xgb.Conn) CapableCookie {
+	if _, ok := c.Extensions["DPMS"]; !ok {
+		panic("Cannot issue request 'Capable' using the uninitialized extension 'DPMS'. dpms.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(capableRequest(c), cookie)
 	return CapableCookie{cookie}
@@ -176,6 +185,9 @@ func Capable(c *xgb.Conn) CapableCookie {
 // CapableUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CapableUnchecked(c *xgb.Conn) CapableCookie {
+	if _, ok := c.Extensions["DPMS"]; !ok {
+		panic("Cannot issue request 'Capable' using the uninitialized extension 'DPMS'. dpms.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(capableRequest(c), cookie)
 	return CapableCookie{cookie}
@@ -254,6 +266,9 @@ type GetTimeoutsCookie struct {
 // GetTimeouts sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetTimeoutsCookie.Reply()
 func GetTimeouts(c *xgb.Conn) GetTimeoutsCookie {
+	if _, ok := c.Extensions["DPMS"]; !ok {
+		panic("Cannot issue request 'GetTimeouts' using the uninitialized extension 'DPMS'. dpms.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getTimeoutsRequest(c), cookie)
 	return GetTimeoutsCookie{cookie}
@@ -262,6 +277,9 @@ func GetTimeouts(c *xgb.Conn) GetTimeoutsCookie {
 // GetTimeoutsUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetTimeoutsUnchecked(c *xgb.Conn) GetTimeoutsCookie {
+	if _, ok := c.Extensions["DPMS"]; !ok {
+		panic("Cannot issue request 'GetTimeouts' using the uninitialized extension 'DPMS'. dpms.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getTimeoutsRequest(c), cookie)
 	return GetTimeoutsCookie{cookie}
@@ -344,6 +362,9 @@ type SetTimeoutsCookie struct {
 // SetTimeouts sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetTimeouts(c *xgb.Conn, StandbyTimeout uint16, SuspendTimeout uint16, OffTimeout uint16) SetTimeoutsCookie {
+	if _, ok := c.Extensions["DPMS"]; !ok {
+		panic("Cannot issue request 'SetTimeouts' using the uninitialized extension 'DPMS'. dpms.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setTimeoutsRequest(c, StandbyTimeout, SuspendTimeout, OffTimeout), cookie)
 	return SetTimeoutsCookie{cookie}
@@ -352,6 +373,9 @@ func SetTimeouts(c *xgb.Conn, StandbyTimeout uint16, SuspendTimeout uint16, OffT
 // SetTimeoutsChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetTimeoutsCookie.Check()
 func SetTimeoutsChecked(c *xgb.Conn, StandbyTimeout uint16, SuspendTimeout uint16, OffTimeout uint16) SetTimeoutsCookie {
+	if _, ok := c.Extensions["DPMS"]; !ok {
+		panic("Cannot issue request 'SetTimeouts' using the uninitialized extension 'DPMS'. dpms.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setTimeoutsRequest(c, StandbyTimeout, SuspendTimeout, OffTimeout), cookie)
 	return SetTimeoutsCookie{cookie}
@@ -399,6 +423,9 @@ type EnableCookie struct {
 // Enable sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func Enable(c *xgb.Conn) EnableCookie {
+	if _, ok := c.Extensions["DPMS"]; !ok {
+		panic("Cannot issue request 'Enable' using the uninitialized extension 'DPMS'. dpms.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(enableRequest(c), cookie)
 	return EnableCookie{cookie}
@@ -407,6 +434,9 @@ func Enable(c *xgb.Conn) EnableCookie {
 // EnableChecked sends a checked request.
 // If an error occurs, it can be retrieved using EnableCookie.Check()
 func EnableChecked(c *xgb.Conn) EnableCookie {
+	if _, ok := c.Extensions["DPMS"]; !ok {
+		panic("Cannot issue request 'Enable' using the uninitialized extension 'DPMS'. dpms.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(enableRequest(c), cookie)
 	return EnableCookie{cookie}
@@ -445,6 +475,9 @@ type DisableCookie struct {
 // Disable sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func Disable(c *xgb.Conn) DisableCookie {
+	if _, ok := c.Extensions["DPMS"]; !ok {
+		panic("Cannot issue request 'Disable' using the uninitialized extension 'DPMS'. dpms.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(disableRequest(c), cookie)
 	return DisableCookie{cookie}
@@ -453,6 +486,9 @@ func Disable(c *xgb.Conn) DisableCookie {
 // DisableChecked sends a checked request.
 // If an error occurs, it can be retrieved using DisableCookie.Check()
 func DisableChecked(c *xgb.Conn) DisableCookie {
+	if _, ok := c.Extensions["DPMS"]; !ok {
+		panic("Cannot issue request 'Disable' using the uninitialized extension 'DPMS'. dpms.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(disableRequest(c), cookie)
 	return DisableCookie{cookie}
@@ -491,6 +527,9 @@ type ForceLevelCookie struct {
 // ForceLevel sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ForceLevel(c *xgb.Conn, PowerLevel uint16) ForceLevelCookie {
+	if _, ok := c.Extensions["DPMS"]; !ok {
+		panic("Cannot issue request 'ForceLevel' using the uninitialized extension 'DPMS'. dpms.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(forceLevelRequest(c, PowerLevel), cookie)
 	return ForceLevelCookie{cookie}
@@ -499,6 +538,9 @@ func ForceLevel(c *xgb.Conn, PowerLevel uint16) ForceLevelCookie {
 // ForceLevelChecked sends a checked request.
 // If an error occurs, it can be retrieved using ForceLevelCookie.Check()
 func ForceLevelChecked(c *xgb.Conn, PowerLevel uint16) ForceLevelCookie {
+	if _, ok := c.Extensions["DPMS"]; !ok {
+		panic("Cannot issue request 'ForceLevel' using the uninitialized extension 'DPMS'. dpms.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(forceLevelRequest(c, PowerLevel), cookie)
 	return ForceLevelCookie{cookie}
@@ -540,6 +582,9 @@ type InfoCookie struct {
 // Info sends a checked request.
 // If an error occurs, it will be returned with the reply by calling InfoCookie.Reply()
 func Info(c *xgb.Conn) InfoCookie {
+	if _, ok := c.Extensions["DPMS"]; !ok {
+		panic("Cannot issue request 'Info' using the uninitialized extension 'DPMS'. dpms.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(infoRequest(c), cookie)
 	return InfoCookie{cookie}
@@ -548,6 +593,9 @@ func Info(c *xgb.Conn) InfoCookie {
 // InfoUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func InfoUnchecked(c *xgb.Conn) InfoCookie {
+	if _, ok := c.Extensions["DPMS"]; !ok {
+		panic("Cannot issue request 'Info' using the uninitialized extension 'DPMS'. dpms.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(infoRequest(c), cookie)
 	return InfoCookie{cookie}
diff --git a/nexgb/dri2/dri2.go b/nexgb/dri2/dri2.go
index deffdb6..7a10897 100644
--- a/nexgb/dri2/dri2.go
+++ b/nexgb/dri2/dri2.go
@@ -2,7 +2,7 @@
 package dri2
 
 /*
-	This file was generated by dri2.xml on May 11 2012 1:58:35am EDT.
+	This file was generated by dri2.xml on May 11 2012 11:57:19pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -40,14 +40,6 @@ func init() {
 	xgb.NewExtErrorFuncs["DRI2"] = make(map[int]xgb.NewErrorFun)
 }
 
-// Skipping definition for base type 'Char'
-
-// Skipping definition for base type 'Card32'
-
-// Skipping definition for base type 'Double'
-
-// Skipping definition for base type 'Bool'
-
 // Skipping definition for base type 'Float'
 
 // Skipping definition for base type 'Card8'
@@ -64,6 +56,14 @@ func init() {
 
 // Skipping definition for base type 'Card16'
 
+// Skipping definition for base type 'Char'
+
+// Skipping definition for base type 'Card32'
+
+// Skipping definition for base type 'Double'
+
+// Skipping definition for base type 'Bool'
+
 const (
 	AttachmentBufferFrontLeft      = 0
 	AttachmentBufferBackLeft       = 1
@@ -405,6 +405,9 @@ type QueryVersionCookie struct {
 // QueryVersion sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryVersionCookie.Reply()
 func QueryVersion(c *xgb.Conn, MajorVersion uint32, MinorVersion uint32) QueryVersionCookie {
+	if _, ok := c.Extensions["DRI2"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'DRI2'. dri2.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryVersionRequest(c, MajorVersion, MinorVersion), cookie)
 	return QueryVersionCookie{cookie}
@@ -413,6 +416,9 @@ func QueryVersion(c *xgb.Conn, MajorVersion uint32, MinorVersion uint32) QueryVe
 // QueryVersionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryVersionUnchecked(c *xgb.Conn, MajorVersion uint32, MinorVersion uint32) QueryVersionCookie {
+	if _, ok := c.Extensions["DRI2"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'DRI2'. dri2.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryVersionRequest(c, MajorVersion, MinorVersion), cookie)
 	return QueryVersionCookie{cookie}
@@ -494,6 +500,9 @@ type ConnectCookie struct {
 // Connect sends a checked request.
 // If an error occurs, it will be returned with the reply by calling ConnectCookie.Reply()
 func Connect(c *xgb.Conn, Window xproto.Window, DriverType uint32) ConnectCookie {
+	if _, ok := c.Extensions["DRI2"]; !ok {
+		panic("Cannot issue request 'Connect' using the uninitialized extension 'DRI2'. dri2.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(connectRequest(c, Window, DriverType), cookie)
 	return ConnectCookie{cookie}
@@ -502,6 +511,9 @@ func Connect(c *xgb.Conn, Window xproto.Window, DriverType uint32) ConnectCookie
 // ConnectUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ConnectUnchecked(c *xgb.Conn, Window xproto.Window, DriverType uint32) ConnectCookie {
+	if _, ok := c.Extensions["DRI2"]; !ok {
+		panic("Cannot issue request 'Connect' using the uninitialized extension 'DRI2'. dri2.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(connectRequest(c, Window, DriverType), cookie)
 	return ConnectCookie{cookie}
@@ -607,6 +619,9 @@ type AuthenticateCookie struct {
 // Authenticate sends a checked request.
 // If an error occurs, it will be returned with the reply by calling AuthenticateCookie.Reply()
 func Authenticate(c *xgb.Conn, Window xproto.Window, Magic uint32) AuthenticateCookie {
+	if _, ok := c.Extensions["DRI2"]; !ok {
+		panic("Cannot issue request 'Authenticate' using the uninitialized extension 'DRI2'. dri2.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(authenticateRequest(c, Window, Magic), cookie)
 	return AuthenticateCookie{cookie}
@@ -615,6 +630,9 @@ func Authenticate(c *xgb.Conn, Window xproto.Window, Magic uint32) AuthenticateC
 // AuthenticateUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func AuthenticateUnchecked(c *xgb.Conn, Window xproto.Window, Magic uint32) AuthenticateCookie {
+	if _, ok := c.Extensions["DRI2"]; !ok {
+		panic("Cannot issue request 'Authenticate' using the uninitialized extension 'DRI2'. dri2.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(authenticateRequest(c, Window, Magic), cookie)
 	return AuthenticateCookie{cookie}
@@ -692,6 +710,9 @@ type CreateDrawableCookie struct {
 // CreateDrawable sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateDrawable(c *xgb.Conn, Drawable xproto.Drawable) CreateDrawableCookie {
+	if _, ok := c.Extensions["DRI2"]; !ok {
+		panic("Cannot issue request 'CreateDrawable' using the uninitialized extension 'DRI2'. dri2.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createDrawableRequest(c, Drawable), cookie)
 	return CreateDrawableCookie{cookie}
@@ -700,6 +721,9 @@ func CreateDrawable(c *xgb.Conn, Drawable xproto.Drawable) CreateDrawableCookie
 // CreateDrawableChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreateDrawableCookie.Check()
 func CreateDrawableChecked(c *xgb.Conn, Drawable xproto.Drawable) CreateDrawableCookie {
+	if _, ok := c.Extensions["DRI2"]; !ok {
+		panic("Cannot issue request 'CreateDrawable' using the uninitialized extension 'DRI2'. dri2.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createDrawableRequest(c, Drawable), cookie)
 	return CreateDrawableCookie{cookie}
@@ -741,6 +765,9 @@ type DestroyDrawableCookie struct {
 // DestroyDrawable sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func DestroyDrawable(c *xgb.Conn, Drawable xproto.Drawable) DestroyDrawableCookie {
+	if _, ok := c.Extensions["DRI2"]; !ok {
+		panic("Cannot issue request 'DestroyDrawable' using the uninitialized extension 'DRI2'. dri2.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(destroyDrawableRequest(c, Drawable), cookie)
 	return DestroyDrawableCookie{cookie}
@@ -749,6 +776,9 @@ func DestroyDrawable(c *xgb.Conn, Drawable xproto.Drawable) DestroyDrawableCooki
 // DestroyDrawableChecked sends a checked request.
 // If an error occurs, it can be retrieved using DestroyDrawableCookie.Check()
 func DestroyDrawableChecked(c *xgb.Conn, Drawable xproto.Drawable) DestroyDrawableCookie {
+	if _, ok := c.Extensions["DRI2"]; !ok {
+		panic("Cannot issue request 'DestroyDrawable' using the uninitialized extension 'DRI2'. dri2.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(destroyDrawableRequest(c, Drawable), cookie)
 	return DestroyDrawableCookie{cookie}
@@ -790,6 +820,9 @@ type GetBuffersCookie struct {
 // GetBuffers sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetBuffersCookie.Reply()
 func GetBuffers(c *xgb.Conn, Drawable xproto.Drawable, Count uint32, Attachments []uint32) GetBuffersCookie {
+	if _, ok := c.Extensions["DRI2"]; !ok {
+		panic("Cannot issue request 'GetBuffers' using the uninitialized extension 'DRI2'. dri2.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getBuffersRequest(c, Drawable, Count, Attachments), cookie)
 	return GetBuffersCookie{cookie}
@@ -798,6 +831,9 @@ func GetBuffers(c *xgb.Conn, Drawable xproto.Drawable, Count uint32, Attachments
 // GetBuffersUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetBuffersUnchecked(c *xgb.Conn, Drawable xproto.Drawable, Count uint32, Attachments []uint32) GetBuffersCookie {
+	if _, ok := c.Extensions["DRI2"]; !ok {
+		panic("Cannot issue request 'GetBuffers' using the uninitialized extension 'DRI2'. dri2.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getBuffersRequest(c, Drawable, Count, Attachments), cookie)
 	return GetBuffersCookie{cookie}
@@ -896,6 +932,9 @@ type CopyRegionCookie struct {
 // CopyRegion sends a checked request.
 // If an error occurs, it will be returned with the reply by calling CopyRegionCookie.Reply()
 func CopyRegion(c *xgb.Conn, Drawable xproto.Drawable, Region uint32, Dest uint32, Src uint32) CopyRegionCookie {
+	if _, ok := c.Extensions["DRI2"]; !ok {
+		panic("Cannot issue request 'CopyRegion' using the uninitialized extension 'DRI2'. dri2.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(copyRegionRequest(c, Drawable, Region, Dest, Src), cookie)
 	return CopyRegionCookie{cookie}
@@ -904,6 +943,9 @@ func CopyRegion(c *xgb.Conn, Drawable xproto.Drawable, Region uint32, Dest uint3
 // CopyRegionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CopyRegionUnchecked(c *xgb.Conn, Drawable xproto.Drawable, Region uint32, Dest uint32, Src uint32) CopyRegionCookie {
+	if _, ok := c.Extensions["DRI2"]; !ok {
+		panic("Cannot issue request 'CopyRegion' using the uninitialized extension 'DRI2'. dri2.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(copyRegionRequest(c, Drawable, Region, Dest, Src), cookie)
 	return CopyRegionCookie{cookie}
@@ -983,6 +1025,9 @@ type GetBuffersWithFormatCookie struct {
 // GetBuffersWithFormat sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetBuffersWithFormatCookie.Reply()
 func GetBuffersWithFormat(c *xgb.Conn, Drawable xproto.Drawable, Count uint32, Attachments []AttachFormat) GetBuffersWithFormatCookie {
+	if _, ok := c.Extensions["DRI2"]; !ok {
+		panic("Cannot issue request 'GetBuffersWithFormat' using the uninitialized extension 'DRI2'. dri2.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getBuffersWithFormatRequest(c, Drawable, Count, Attachments), cookie)
 	return GetBuffersWithFormatCookie{cookie}
@@ -991,6 +1036,9 @@ func GetBuffersWithFormat(c *xgb.Conn, Drawable xproto.Drawable, Count uint32, A
 // GetBuffersWithFormatUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetBuffersWithFormatUnchecked(c *xgb.Conn, Drawable xproto.Drawable, Count uint32, Attachments []AttachFormat) GetBuffersWithFormatCookie {
+	if _, ok := c.Extensions["DRI2"]; !ok {
+		panic("Cannot issue request 'GetBuffersWithFormat' using the uninitialized extension 'DRI2'. dri2.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getBuffersWithFormatRequest(c, Drawable, Count, Attachments), cookie)
 	return GetBuffersWithFormatCookie{cookie}
@@ -1085,6 +1133,9 @@ type SwapBuffersCookie struct {
 // SwapBuffers sends a checked request.
 // If an error occurs, it will be returned with the reply by calling SwapBuffersCookie.Reply()
 func SwapBuffers(c *xgb.Conn, Drawable xproto.Drawable, TargetMscHi uint32, TargetMscLo uint32, DivisorHi uint32, DivisorLo uint32, RemainderHi uint32, RemainderLo uint32) SwapBuffersCookie {
+	if _, ok := c.Extensions["DRI2"]; !ok {
+		panic("Cannot issue request 'SwapBuffers' using the uninitialized extension 'DRI2'. dri2.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(swapBuffersRequest(c, Drawable, TargetMscHi, TargetMscLo, DivisorHi, DivisorLo, RemainderHi, RemainderLo), cookie)
 	return SwapBuffersCookie{cookie}
@@ -1093,6 +1144,9 @@ func SwapBuffers(c *xgb.Conn, Drawable xproto.Drawable, TargetMscHi uint32, Targ
 // SwapBuffersUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SwapBuffersUnchecked(c *xgb.Conn, Drawable xproto.Drawable, TargetMscHi uint32, TargetMscLo uint32, DivisorHi uint32, DivisorLo uint32, RemainderHi uint32, RemainderLo uint32) SwapBuffersCookie {
+	if _, ok := c.Extensions["DRI2"]; !ok {
+		panic("Cannot issue request 'SwapBuffers' using the uninitialized extension 'DRI2'. dri2.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(swapBuffersRequest(c, Drawable, TargetMscHi, TargetMscLo, DivisorHi, DivisorLo, RemainderHi, RemainderLo), cookie)
 	return SwapBuffersCookie{cookie}
@@ -1189,6 +1243,9 @@ type GetMSCCookie struct {
 // GetMSC sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetMSCCookie.Reply()
 func GetMSC(c *xgb.Conn, Drawable xproto.Drawable) GetMSCCookie {
+	if _, ok := c.Extensions["DRI2"]; !ok {
+		panic("Cannot issue request 'GetMSC' using the uninitialized extension 'DRI2'. dri2.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getMSCRequest(c, Drawable), cookie)
 	return GetMSCCookie{cookie}
@@ -1197,6 +1254,9 @@ func GetMSC(c *xgb.Conn, Drawable xproto.Drawable) GetMSCCookie {
 // GetMSCUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetMSCUnchecked(c *xgb.Conn, Drawable xproto.Drawable) GetMSCCookie {
+	if _, ok := c.Extensions["DRI2"]; !ok {
+		panic("Cannot issue request 'GetMSC' using the uninitialized extension 'DRI2'. dri2.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getMSCRequest(c, Drawable), cookie)
 	return GetMSCCookie{cookie}
@@ -1291,6 +1351,9 @@ type WaitMSCCookie struct {
 // WaitMSC sends a checked request.
 // If an error occurs, it will be returned with the reply by calling WaitMSCCookie.Reply()
 func WaitMSC(c *xgb.Conn, Drawable xproto.Drawable, TargetMscHi uint32, TargetMscLo uint32, DivisorHi uint32, DivisorLo uint32, RemainderHi uint32, RemainderLo uint32) WaitMSCCookie {
+	if _, ok := c.Extensions["DRI2"]; !ok {
+		panic("Cannot issue request 'WaitMSC' using the uninitialized extension 'DRI2'. dri2.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(waitMSCRequest(c, Drawable, TargetMscHi, TargetMscLo, DivisorHi, DivisorLo, RemainderHi, RemainderLo), cookie)
 	return WaitMSCCookie{cookie}
@@ -1299,6 +1362,9 @@ func WaitMSC(c *xgb.Conn, Drawable xproto.Drawable, TargetMscHi uint32, TargetMs
 // WaitMSCUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func WaitMSCUnchecked(c *xgb.Conn, Drawable xproto.Drawable, TargetMscHi uint32, TargetMscLo uint32, DivisorHi uint32, DivisorLo uint32, RemainderHi uint32, RemainderLo uint32) WaitMSCCookie {
+	if _, ok := c.Extensions["DRI2"]; !ok {
+		panic("Cannot issue request 'WaitMSC' using the uninitialized extension 'DRI2'. dri2.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(waitMSCRequest(c, Drawable, TargetMscHi, TargetMscLo, DivisorHi, DivisorLo, RemainderHi, RemainderLo), cookie)
 	return WaitMSCCookie{cookie}
@@ -1411,6 +1477,9 @@ type WaitSBCCookie struct {
 // WaitSBC sends a checked request.
 // If an error occurs, it will be returned with the reply by calling WaitSBCCookie.Reply()
 func WaitSBC(c *xgb.Conn, Drawable xproto.Drawable, TargetSbcHi uint32, TargetSbcLo uint32) WaitSBCCookie {
+	if _, ok := c.Extensions["DRI2"]; !ok {
+		panic("Cannot issue request 'WaitSBC' using the uninitialized extension 'DRI2'. dri2.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(waitSBCRequest(c, Drawable, TargetSbcHi, TargetSbcLo), cookie)
 	return WaitSBCCookie{cookie}
@@ -1419,6 +1488,9 @@ func WaitSBC(c *xgb.Conn, Drawable xproto.Drawable, TargetSbcHi uint32, TargetSb
 // WaitSBCUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func WaitSBCUnchecked(c *xgb.Conn, Drawable xproto.Drawable, TargetSbcHi uint32, TargetSbcLo uint32) WaitSBCCookie {
+	if _, ok := c.Extensions["DRI2"]; !ok {
+		panic("Cannot issue request 'WaitSBC' using the uninitialized extension 'DRI2'. dri2.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(waitSBCRequest(c, Drawable, TargetSbcHi, TargetSbcLo), cookie)
 	return WaitSBCCookie{cookie}
@@ -1519,6 +1591,9 @@ type SwapIntervalCookie struct {
 // SwapInterval sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SwapInterval(c *xgb.Conn, Drawable xproto.Drawable, Interval uint32) SwapIntervalCookie {
+	if _, ok := c.Extensions["DRI2"]; !ok {
+		panic("Cannot issue request 'SwapInterval' using the uninitialized extension 'DRI2'. dri2.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(swapIntervalRequest(c, Drawable, Interval), cookie)
 	return SwapIntervalCookie{cookie}
@@ -1527,6 +1602,9 @@ func SwapInterval(c *xgb.Conn, Drawable xproto.Drawable, Interval uint32) SwapIn
 // SwapIntervalChecked sends a checked request.
 // If an error occurs, it can be retrieved using SwapIntervalCookie.Check()
 func SwapIntervalChecked(c *xgb.Conn, Drawable xproto.Drawable, Interval uint32) SwapIntervalCookie {
+	if _, ok := c.Extensions["DRI2"]; !ok {
+		panic("Cannot issue request 'SwapInterval' using the uninitialized extension 'DRI2'. dri2.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(swapIntervalRequest(c, Drawable, Interval), cookie)
 	return SwapIntervalCookie{cookie}
diff --git a/nexgb/ge/ge.go b/nexgb/ge/ge.go
index 42a60ea..e7592d8 100644
--- a/nexgb/ge/ge.go
+++ b/nexgb/ge/ge.go
@@ -2,7 +2,7 @@
 package ge
 
 /*
-	This file was generated by ge.xml on May 11 2012 1:58:35am EDT.
+	This file was generated by ge.xml on May 11 2012 11:57:19pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -72,6 +72,9 @@ type QueryVersionCookie struct {
 // QueryVersion sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryVersionCookie.Reply()
 func QueryVersion(c *xgb.Conn, ClientMajorVersion uint16, ClientMinorVersion uint16) QueryVersionCookie {
+	if _, ok := c.Extensions["GENERIC EVENT EXTENSION"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'Generic Event Extension'. ge.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryVersionRequest(c, ClientMajorVersion, ClientMinorVersion), cookie)
 	return QueryVersionCookie{cookie}
@@ -80,6 +83,9 @@ func QueryVersion(c *xgb.Conn, ClientMajorVersion uint16, ClientMinorVersion uin
 // QueryVersionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryVersionUnchecked(c *xgb.Conn, ClientMajorVersion uint16, ClientMinorVersion uint16) QueryVersionCookie {
+	if _, ok := c.Extensions["GENERIC EVENT EXTENSION"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'Generic Event Extension'. ge.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryVersionRequest(c, ClientMajorVersion, ClientMinorVersion), cookie)
 	return QueryVersionCookie{cookie}
diff --git a/nexgb/glx/glx.go b/nexgb/glx/glx.go
index 6bc3615..0f67127 100644
--- a/nexgb/glx/glx.go
+++ b/nexgb/glx/glx.go
@@ -2,7 +2,7 @@
 package glx
 
 /*
-	This file was generated by glx.xml on May 11 2012 1:58:35am EDT.
+	This file was generated by glx.xml on May 11 2012 11:57:19pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -40,16 +40,6 @@ func init() {
 	xgb.NewExtErrorFuncs["GLX"] = make(map[int]xgb.NewErrorFun)
 }
 
-// Skipping definition for base type 'Card16'
-
-// Skipping definition for base type 'Char'
-
-// Skipping definition for base type 'Card32'
-
-// Skipping definition for base type 'Double'
-
-// Skipping definition for base type 'Bool'
-
 // Skipping definition for base type 'Float'
 
 // Skipping definition for base type 'Card8'
@@ -64,6 +54,16 @@ func init() {
 
 // Skipping definition for base type 'Int8'
 
+// Skipping definition for base type 'Card16'
+
+// Skipping definition for base type 'Char'
+
+// Skipping definition for base type 'Card32'
+
+// Skipping definition for base type 'Double'
+
+// Skipping definition for base type 'Bool'
+
 const (
 	PbcetDamaged = 32791
 	PbcetSaved   = 32792
@@ -916,6 +916,9 @@ type RenderCookie struct {
 // Render sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func Render(c *xgb.Conn, ContextTag ContextTag, Data []byte) RenderCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'Render' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(renderRequest(c, ContextTag, Data), cookie)
 	return RenderCookie{cookie}
@@ -924,6 +927,9 @@ func Render(c *xgb.Conn, ContextTag ContextTag, Data []byte) RenderCookie {
 // RenderChecked sends a checked request.
 // If an error occurs, it can be retrieved using RenderCookie.Check()
 func RenderChecked(c *xgb.Conn, ContextTag ContextTag, Data []byte) RenderCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'Render' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(renderRequest(c, ContextTag, Data), cookie)
 	return RenderCookie{cookie}
@@ -968,6 +974,9 @@ type RenderLargeCookie struct {
 // RenderLarge sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func RenderLarge(c *xgb.Conn, ContextTag ContextTag, RequestNum uint16, RequestTotal uint16, DataLen uint32, Data []byte) RenderLargeCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'RenderLarge' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(renderLargeRequest(c, ContextTag, RequestNum, RequestTotal, DataLen, Data), cookie)
 	return RenderLargeCookie{cookie}
@@ -976,6 +985,9 @@ func RenderLarge(c *xgb.Conn, ContextTag ContextTag, RequestNum uint16, RequestT
 // RenderLargeChecked sends a checked request.
 // If an error occurs, it can be retrieved using RenderLargeCookie.Check()
 func RenderLargeChecked(c *xgb.Conn, ContextTag ContextTag, RequestNum uint16, RequestTotal uint16, DataLen uint32, Data []byte) RenderLargeCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'RenderLarge' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(renderLargeRequest(c, ContextTag, RequestNum, RequestTotal, DataLen, Data), cookie)
 	return RenderLargeCookie{cookie}
@@ -1029,6 +1041,9 @@ type CreateContextCookie struct {
 // CreateContext sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateContext(c *xgb.Conn, Context Context, Visual xproto.Visualid, Screen uint32, ShareList Context, IsDirect bool) CreateContextCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'CreateContext' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createContextRequest(c, Context, Visual, Screen, ShareList, IsDirect), cookie)
 	return CreateContextCookie{cookie}
@@ -1037,6 +1052,9 @@ func CreateContext(c *xgb.Conn, Context Context, Visual xproto.Visualid, Screen
 // CreateContextChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreateContextCookie.Check()
 func CreateContextChecked(c *xgb.Conn, Context Context, Visual xproto.Visualid, Screen uint32, ShareList Context, IsDirect bool) CreateContextCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'CreateContext' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createContextRequest(c, Context, Visual, Screen, ShareList, IsDirect), cookie)
 	return CreateContextCookie{cookie}
@@ -1096,6 +1114,9 @@ type DestroyContextCookie struct {
 // DestroyContext sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func DestroyContext(c *xgb.Conn, Context Context) DestroyContextCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'DestroyContext' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(destroyContextRequest(c, Context), cookie)
 	return DestroyContextCookie{cookie}
@@ -1104,6 +1125,9 @@ func DestroyContext(c *xgb.Conn, Context Context) DestroyContextCookie {
 // DestroyContextChecked sends a checked request.
 // If an error occurs, it can be retrieved using DestroyContextCookie.Check()
 func DestroyContextChecked(c *xgb.Conn, Context Context) DestroyContextCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'DestroyContext' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(destroyContextRequest(c, Context), cookie)
 	return DestroyContextCookie{cookie}
@@ -1145,6 +1169,9 @@ type MakeCurrentCookie struct {
 // MakeCurrent sends a checked request.
 // If an error occurs, it will be returned with the reply by calling MakeCurrentCookie.Reply()
 func MakeCurrent(c *xgb.Conn, Drawable Drawable, Context Context, OldContextTag ContextTag) MakeCurrentCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'MakeCurrent' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(makeCurrentRequest(c, Drawable, Context, OldContextTag), cookie)
 	return MakeCurrentCookie{cookie}
@@ -1153,6 +1180,9 @@ func MakeCurrent(c *xgb.Conn, Drawable Drawable, Context Context, OldContextTag
 // MakeCurrentUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func MakeCurrentUnchecked(c *xgb.Conn, Drawable Drawable, Context Context, OldContextTag ContextTag) MakeCurrentCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'MakeCurrent' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(makeCurrentRequest(c, Drawable, Context, OldContextTag), cookie)
 	return MakeCurrentCookie{cookie}
@@ -1236,6 +1266,9 @@ type IsDirectCookie struct {
 // IsDirect sends a checked request.
 // If an error occurs, it will be returned with the reply by calling IsDirectCookie.Reply()
 func IsDirect(c *xgb.Conn, Context Context) IsDirectCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'IsDirect' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(isDirectRequest(c, Context), cookie)
 	return IsDirectCookie{cookie}
@@ -1244,6 +1277,9 @@ func IsDirect(c *xgb.Conn, Context Context) IsDirectCookie {
 // IsDirectUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func IsDirectUnchecked(c *xgb.Conn, Context Context) IsDirectCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'IsDirect' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(isDirectRequest(c, Context), cookie)
 	return IsDirectCookie{cookie}
@@ -1325,6 +1361,9 @@ type QueryVersionCookie struct {
 // QueryVersion sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryVersionCookie.Reply()
 func QueryVersion(c *xgb.Conn, MajorVersion uint32, MinorVersion uint32) QueryVersionCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryVersionRequest(c, MajorVersion, MinorVersion), cookie)
 	return QueryVersionCookie{cookie}
@@ -1333,6 +1372,9 @@ func QueryVersion(c *xgb.Conn, MajorVersion uint32, MinorVersion uint32) QueryVe
 // QueryVersionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryVersionUnchecked(c *xgb.Conn, MajorVersion uint32, MinorVersion uint32) QueryVersionCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryVersionRequest(c, MajorVersion, MinorVersion), cookie)
 	return QueryVersionCookie{cookie}
@@ -1417,6 +1459,9 @@ type WaitGLCookie struct {
 // WaitGL sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func WaitGL(c *xgb.Conn, ContextTag ContextTag) WaitGLCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'WaitGL' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(waitGLRequest(c, ContextTag), cookie)
 	return WaitGLCookie{cookie}
@@ -1425,6 +1470,9 @@ func WaitGL(c *xgb.Conn, ContextTag ContextTag) WaitGLCookie {
 // WaitGLChecked sends a checked request.
 // If an error occurs, it can be retrieved using WaitGLCookie.Check()
 func WaitGLChecked(c *xgb.Conn, ContextTag ContextTag) WaitGLCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'WaitGL' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(waitGLRequest(c, ContextTag), cookie)
 	return WaitGLCookie{cookie}
@@ -1466,6 +1514,9 @@ type WaitXCookie struct {
 // WaitX sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func WaitX(c *xgb.Conn, ContextTag ContextTag) WaitXCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'WaitX' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(waitXRequest(c, ContextTag), cookie)
 	return WaitXCookie{cookie}
@@ -1474,6 +1525,9 @@ func WaitX(c *xgb.Conn, ContextTag ContextTag) WaitXCookie {
 // WaitXChecked sends a checked request.
 // If an error occurs, it can be retrieved using WaitXCookie.Check()
 func WaitXChecked(c *xgb.Conn, ContextTag ContextTag) WaitXCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'WaitX' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(waitXRequest(c, ContextTag), cookie)
 	return WaitXCookie{cookie}
@@ -1515,6 +1569,9 @@ type CopyContextCookie struct {
 // CopyContext sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CopyContext(c *xgb.Conn, Src Context, Dest Context, Mask uint32, SrcContextTag ContextTag) CopyContextCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'CopyContext' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(copyContextRequest(c, Src, Dest, Mask, SrcContextTag), cookie)
 	return CopyContextCookie{cookie}
@@ -1523,6 +1580,9 @@ func CopyContext(c *xgb.Conn, Src Context, Dest Context, Mask uint32, SrcContext
 // CopyContextChecked sends a checked request.
 // If an error occurs, it can be retrieved using CopyContextCookie.Check()
 func CopyContextChecked(c *xgb.Conn, Src Context, Dest Context, Mask uint32, SrcContextTag ContextTag) CopyContextCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'CopyContext' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(copyContextRequest(c, Src, Dest, Mask, SrcContextTag), cookie)
 	return CopyContextCookie{cookie}
@@ -1573,6 +1633,9 @@ type SwapBuffersCookie struct {
 // SwapBuffers sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SwapBuffers(c *xgb.Conn, ContextTag ContextTag, Drawable Drawable) SwapBuffersCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'SwapBuffers' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(swapBuffersRequest(c, ContextTag, Drawable), cookie)
 	return SwapBuffersCookie{cookie}
@@ -1581,6 +1644,9 @@ func SwapBuffers(c *xgb.Conn, ContextTag ContextTag, Drawable Drawable) SwapBuff
 // SwapBuffersChecked sends a checked request.
 // If an error occurs, it can be retrieved using SwapBuffersCookie.Check()
 func SwapBuffersChecked(c *xgb.Conn, ContextTag ContextTag, Drawable Drawable) SwapBuffersCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'SwapBuffers' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(swapBuffersRequest(c, ContextTag, Drawable), cookie)
 	return SwapBuffersCookie{cookie}
@@ -1625,6 +1691,9 @@ type UseXFontCookie struct {
 // UseXFont sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func UseXFont(c *xgb.Conn, ContextTag ContextTag, Font xproto.Font, First uint32, Count uint32, ListBase uint32) UseXFontCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'UseXFont' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(useXFontRequest(c, ContextTag, Font, First, Count, ListBase), cookie)
 	return UseXFontCookie{cookie}
@@ -1633,6 +1702,9 @@ func UseXFont(c *xgb.Conn, ContextTag ContextTag, Font xproto.Font, First uint32
 // UseXFontChecked sends a checked request.
 // If an error occurs, it can be retrieved using UseXFontCookie.Check()
 func UseXFontChecked(c *xgb.Conn, ContextTag ContextTag, Font xproto.Font, First uint32, Count uint32, ListBase uint32) UseXFontCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'UseXFont' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(useXFontRequest(c, ContextTag, Font, First, Count, ListBase), cookie)
 	return UseXFontCookie{cookie}
@@ -1686,6 +1758,9 @@ type CreateGLXPixmapCookie struct {
 // CreateGLXPixmap sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateGLXPixmap(c *xgb.Conn, Screen uint32, Visual xproto.Visualid, Pixmap xproto.Pixmap, GlxPixmap Pixmap) CreateGLXPixmapCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'CreateGLXPixmap' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createGLXPixmapRequest(c, Screen, Visual, Pixmap, GlxPixmap), cookie)
 	return CreateGLXPixmapCookie{cookie}
@@ -1694,6 +1769,9 @@ func CreateGLXPixmap(c *xgb.Conn, Screen uint32, Visual xproto.Visualid, Pixmap
 // CreateGLXPixmapChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreateGLXPixmapCookie.Check()
 func CreateGLXPixmapChecked(c *xgb.Conn, Screen uint32, Visual xproto.Visualid, Pixmap xproto.Pixmap, GlxPixmap Pixmap) CreateGLXPixmapCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'CreateGLXPixmap' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createGLXPixmapRequest(c, Screen, Visual, Pixmap, GlxPixmap), cookie)
 	return CreateGLXPixmapCookie{cookie}
@@ -1744,6 +1822,9 @@ type GetVisualConfigsCookie struct {
 // GetVisualConfigs sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetVisualConfigsCookie.Reply()
 func GetVisualConfigs(c *xgb.Conn, Screen uint32) GetVisualConfigsCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetVisualConfigs' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getVisualConfigsRequest(c, Screen), cookie)
 	return GetVisualConfigsCookie{cookie}
@@ -1752,6 +1833,9 @@ func GetVisualConfigs(c *xgb.Conn, Screen uint32) GetVisualConfigsCookie {
 // GetVisualConfigsUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetVisualConfigsUnchecked(c *xgb.Conn, Screen uint32) GetVisualConfigsCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetVisualConfigs' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getVisualConfigsRequest(c, Screen), cookie)
 	return GetVisualConfigsCookie{cookie}
@@ -1841,6 +1925,9 @@ type DestroyGLXPixmapCookie struct {
 // DestroyGLXPixmap sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func DestroyGLXPixmap(c *xgb.Conn, GlxPixmap Pixmap) DestroyGLXPixmapCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'DestroyGLXPixmap' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(destroyGLXPixmapRequest(c, GlxPixmap), cookie)
 	return DestroyGLXPixmapCookie{cookie}
@@ -1849,6 +1936,9 @@ func DestroyGLXPixmap(c *xgb.Conn, GlxPixmap Pixmap) DestroyGLXPixmapCookie {
 // DestroyGLXPixmapChecked sends a checked request.
 // If an error occurs, it can be retrieved using DestroyGLXPixmapCookie.Check()
 func DestroyGLXPixmapChecked(c *xgb.Conn, GlxPixmap Pixmap) DestroyGLXPixmapCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'DestroyGLXPixmap' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(destroyGLXPixmapRequest(c, GlxPixmap), cookie)
 	return DestroyGLXPixmapCookie{cookie}
@@ -1890,6 +1980,9 @@ type VendorPrivateCookie struct {
 // VendorPrivate sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func VendorPrivate(c *xgb.Conn, VendorCode uint32, ContextTag ContextTag, Data []byte) VendorPrivateCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'VendorPrivate' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(vendorPrivateRequest(c, VendorCode, ContextTag, Data), cookie)
 	return VendorPrivateCookie{cookie}
@@ -1898,6 +1991,9 @@ func VendorPrivate(c *xgb.Conn, VendorCode uint32, ContextTag ContextTag, Data [
 // VendorPrivateChecked sends a checked request.
 // If an error occurs, it can be retrieved using VendorPrivateCookie.Check()
 func VendorPrivateChecked(c *xgb.Conn, VendorCode uint32, ContextTag ContextTag, Data []byte) VendorPrivateCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'VendorPrivate' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(vendorPrivateRequest(c, VendorCode, ContextTag, Data), cookie)
 	return VendorPrivateCookie{cookie}
@@ -1945,6 +2041,9 @@ type VendorPrivateWithReplyCookie struct {
 // VendorPrivateWithReply sends a checked request.
 // If an error occurs, it will be returned with the reply by calling VendorPrivateWithReplyCookie.Reply()
 func VendorPrivateWithReply(c *xgb.Conn, VendorCode uint32, ContextTag ContextTag, Data []byte) VendorPrivateWithReplyCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'VendorPrivateWithReply' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(vendorPrivateWithReplyRequest(c, VendorCode, ContextTag, Data), cookie)
 	return VendorPrivateWithReplyCookie{cookie}
@@ -1953,6 +2052,9 @@ func VendorPrivateWithReply(c *xgb.Conn, VendorCode uint32, ContextTag ContextTa
 // VendorPrivateWithReplyUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func VendorPrivateWithReplyUnchecked(c *xgb.Conn, VendorCode uint32, ContextTag ContextTag, Data []byte) VendorPrivateWithReplyCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'VendorPrivateWithReply' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(vendorPrivateWithReplyRequest(c, VendorCode, ContextTag, Data), cookie)
 	return VendorPrivateWithReplyCookie{cookie}
@@ -2043,6 +2145,9 @@ type QueryExtensionsStringCookie struct {
 // QueryExtensionsString sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryExtensionsStringCookie.Reply()
 func QueryExtensionsString(c *xgb.Conn, Screen uint32) QueryExtensionsStringCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'QueryExtensionsString' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryExtensionsStringRequest(c, Screen), cookie)
 	return QueryExtensionsStringCookie{cookie}
@@ -2051,6 +2156,9 @@ func QueryExtensionsString(c *xgb.Conn, Screen uint32) QueryExtensionsStringCook
 // QueryExtensionsStringUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryExtensionsStringUnchecked(c *xgb.Conn, Screen uint32) QueryExtensionsStringCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'QueryExtensionsString' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryExtensionsStringRequest(c, Screen), cookie)
 	return QueryExtensionsStringCookie{cookie}
@@ -2131,6 +2239,9 @@ type QueryServerStringCookie struct {
 // QueryServerString sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryServerStringCookie.Reply()
 func QueryServerString(c *xgb.Conn, Screen uint32, Name uint32) QueryServerStringCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'QueryServerString' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryServerStringRequest(c, Screen, Name), cookie)
 	return QueryServerStringCookie{cookie}
@@ -2139,6 +2250,9 @@ func QueryServerString(c *xgb.Conn, Screen uint32, Name uint32) QueryServerStrin
 // QueryServerStringUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryServerStringUnchecked(c *xgb.Conn, Screen uint32, Name uint32) QueryServerStringCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'QueryServerString' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryServerStringRequest(c, Screen, Name), cookie)
 	return QueryServerStringCookie{cookie}
@@ -2230,6 +2344,9 @@ type ClientInfoCookie struct {
 // ClientInfo sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ClientInfo(c *xgb.Conn, MajorVersion uint32, MinorVersion uint32, StrLen uint32, String string) ClientInfoCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'ClientInfo' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(clientInfoRequest(c, MajorVersion, MinorVersion, StrLen, String), cookie)
 	return ClientInfoCookie{cookie}
@@ -2238,6 +2355,9 @@ func ClientInfo(c *xgb.Conn, MajorVersion uint32, MinorVersion uint32, StrLen ui
 // ClientInfoChecked sends a checked request.
 // If an error occurs, it can be retrieved using ClientInfoCookie.Check()
 func ClientInfoChecked(c *xgb.Conn, MajorVersion uint32, MinorVersion uint32, StrLen uint32, String string) ClientInfoCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'ClientInfo' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(clientInfoRequest(c, MajorVersion, MinorVersion, StrLen, String), cookie)
 	return ClientInfoCookie{cookie}
@@ -2288,6 +2408,9 @@ type GetFBConfigsCookie struct {
 // GetFBConfigs sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetFBConfigsCookie.Reply()
 func GetFBConfigs(c *xgb.Conn, Screen uint32) GetFBConfigsCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetFBConfigs' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getFBConfigsRequest(c, Screen), cookie)
 	return GetFBConfigsCookie{cookie}
@@ -2296,6 +2419,9 @@ func GetFBConfigs(c *xgb.Conn, Screen uint32) GetFBConfigsCookie {
 // GetFBConfigsUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetFBConfigsUnchecked(c *xgb.Conn, Screen uint32) GetFBConfigsCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetFBConfigs' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getFBConfigsRequest(c, Screen), cookie)
 	return GetFBConfigsCookie{cookie}
@@ -2385,6 +2511,9 @@ type CreatePixmapCookie struct {
 // CreatePixmap sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreatePixmap(c *xgb.Conn, Screen uint32, Fbconfig Fbconfig, Pixmap xproto.Pixmap, GlxPixmap Pixmap, NumAttribs uint32, Attribs []uint32) CreatePixmapCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'CreatePixmap' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createPixmapRequest(c, Screen, Fbconfig, Pixmap, GlxPixmap, NumAttribs, Attribs), cookie)
 	return CreatePixmapCookie{cookie}
@@ -2393,6 +2522,9 @@ func CreatePixmap(c *xgb.Conn, Screen uint32, Fbconfig Fbconfig, Pixmap xproto.P
 // CreatePixmapChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreatePixmapCookie.Check()
 func CreatePixmapChecked(c *xgb.Conn, Screen uint32, Fbconfig Fbconfig, Pixmap xproto.Pixmap, GlxPixmap Pixmap, NumAttribs uint32, Attribs []uint32) CreatePixmapCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'CreatePixmap' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createPixmapRequest(c, Screen, Fbconfig, Pixmap, GlxPixmap, NumAttribs, Attribs), cookie)
 	return CreatePixmapCookie{cookie}
@@ -2452,6 +2584,9 @@ type DestroyPixmapCookie struct {
 // DestroyPixmap sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func DestroyPixmap(c *xgb.Conn, GlxPixmap Pixmap) DestroyPixmapCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'DestroyPixmap' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(destroyPixmapRequest(c, GlxPixmap), cookie)
 	return DestroyPixmapCookie{cookie}
@@ -2460,6 +2595,9 @@ func DestroyPixmap(c *xgb.Conn, GlxPixmap Pixmap) DestroyPixmapCookie {
 // DestroyPixmapChecked sends a checked request.
 // If an error occurs, it can be retrieved using DestroyPixmapCookie.Check()
 func DestroyPixmapChecked(c *xgb.Conn, GlxPixmap Pixmap) DestroyPixmapCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'DestroyPixmap' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(destroyPixmapRequest(c, GlxPixmap), cookie)
 	return DestroyPixmapCookie{cookie}
@@ -2501,6 +2639,9 @@ type CreateNewContextCookie struct {
 // CreateNewContext sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateNewContext(c *xgb.Conn, Context Context, Fbconfig Fbconfig, Screen uint32, RenderType uint32, ShareList Context, IsDirect bool) CreateNewContextCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'CreateNewContext' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createNewContextRequest(c, Context, Fbconfig, Screen, RenderType, ShareList, IsDirect), cookie)
 	return CreateNewContextCookie{cookie}
@@ -2509,6 +2650,9 @@ func CreateNewContext(c *xgb.Conn, Context Context, Fbconfig Fbconfig, Screen ui
 // CreateNewContextChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreateNewContextCookie.Check()
 func CreateNewContextChecked(c *xgb.Conn, Context Context, Fbconfig Fbconfig, Screen uint32, RenderType uint32, ShareList Context, IsDirect bool) CreateNewContextCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'CreateNewContext' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createNewContextRequest(c, Context, Fbconfig, Screen, RenderType, ShareList, IsDirect), cookie)
 	return CreateNewContextCookie{cookie}
@@ -2571,6 +2715,9 @@ type QueryContextCookie struct {
 // QueryContext sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryContextCookie.Reply()
 func QueryContext(c *xgb.Conn, Context Context) QueryContextCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'QueryContext' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryContextRequest(c, Context), cookie)
 	return QueryContextCookie{cookie}
@@ -2579,6 +2726,9 @@ func QueryContext(c *xgb.Conn, Context Context) QueryContextCookie {
 // QueryContextUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryContextUnchecked(c *xgb.Conn, Context Context) QueryContextCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'QueryContext' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryContextRequest(c, Context), cookie)
 	return QueryContextCookie{cookie}
@@ -2664,6 +2814,9 @@ type MakeContextCurrentCookie struct {
 // MakeContextCurrent sends a checked request.
 // If an error occurs, it will be returned with the reply by calling MakeContextCurrentCookie.Reply()
 func MakeContextCurrent(c *xgb.Conn, OldContextTag ContextTag, Drawable Drawable, ReadDrawable Drawable, Context Context) MakeContextCurrentCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'MakeContextCurrent' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(makeContextCurrentRequest(c, OldContextTag, Drawable, ReadDrawable, Context), cookie)
 	return MakeContextCurrentCookie{cookie}
@@ -2672,6 +2825,9 @@ func MakeContextCurrent(c *xgb.Conn, OldContextTag ContextTag, Drawable Drawable
 // MakeContextCurrentUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func MakeContextCurrentUnchecked(c *xgb.Conn, OldContextTag ContextTag, Drawable Drawable, ReadDrawable Drawable, Context Context) MakeContextCurrentCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'MakeContextCurrent' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(makeContextCurrentRequest(c, OldContextTag, Drawable, ReadDrawable, Context), cookie)
 	return MakeContextCurrentCookie{cookie}
@@ -2758,6 +2914,9 @@ type CreatePbufferCookie struct {
 // CreatePbuffer sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreatePbuffer(c *xgb.Conn, Screen uint32, Fbconfig Fbconfig, Pbuffer Pbuffer, NumAttribs uint32, Attribs []uint32) CreatePbufferCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'CreatePbuffer' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createPbufferRequest(c, Screen, Fbconfig, Pbuffer, NumAttribs, Attribs), cookie)
 	return CreatePbufferCookie{cookie}
@@ -2766,6 +2925,9 @@ func CreatePbuffer(c *xgb.Conn, Screen uint32, Fbconfig Fbconfig, Pbuffer Pbuffe
 // CreatePbufferChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreatePbufferCookie.Check()
 func CreatePbufferChecked(c *xgb.Conn, Screen uint32, Fbconfig Fbconfig, Pbuffer Pbuffer, NumAttribs uint32, Attribs []uint32) CreatePbufferCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'CreatePbuffer' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createPbufferRequest(c, Screen, Fbconfig, Pbuffer, NumAttribs, Attribs), cookie)
 	return CreatePbufferCookie{cookie}
@@ -2822,6 +2984,9 @@ type DestroyPbufferCookie struct {
 // DestroyPbuffer sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func DestroyPbuffer(c *xgb.Conn, Pbuffer Pbuffer) DestroyPbufferCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'DestroyPbuffer' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(destroyPbufferRequest(c, Pbuffer), cookie)
 	return DestroyPbufferCookie{cookie}
@@ -2830,6 +2995,9 @@ func DestroyPbuffer(c *xgb.Conn, Pbuffer Pbuffer) DestroyPbufferCookie {
 // DestroyPbufferChecked sends a checked request.
 // If an error occurs, it can be retrieved using DestroyPbufferCookie.Check()
 func DestroyPbufferChecked(c *xgb.Conn, Pbuffer Pbuffer) DestroyPbufferCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'DestroyPbuffer' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(destroyPbufferRequest(c, Pbuffer), cookie)
 	return DestroyPbufferCookie{cookie}
@@ -2871,6 +3039,9 @@ type GetDrawableAttributesCookie struct {
 // GetDrawableAttributes sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetDrawableAttributesCookie.Reply()
 func GetDrawableAttributes(c *xgb.Conn, Drawable Drawable) GetDrawableAttributesCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetDrawableAttributes' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getDrawableAttributesRequest(c, Drawable), cookie)
 	return GetDrawableAttributesCookie{cookie}
@@ -2879,6 +3050,9 @@ func GetDrawableAttributes(c *xgb.Conn, Drawable Drawable) GetDrawableAttributes
 // GetDrawableAttributesUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetDrawableAttributesUnchecked(c *xgb.Conn, Drawable Drawable) GetDrawableAttributesCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetDrawableAttributes' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getDrawableAttributesRequest(c, Drawable), cookie)
 	return GetDrawableAttributesCookie{cookie}
@@ -2964,6 +3138,9 @@ type ChangeDrawableAttributesCookie struct {
 // ChangeDrawableAttributes sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ChangeDrawableAttributes(c *xgb.Conn, Drawable Drawable, NumAttribs uint32, Attribs []uint32) ChangeDrawableAttributesCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'ChangeDrawableAttributes' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(changeDrawableAttributesRequest(c, Drawable, NumAttribs, Attribs), cookie)
 	return ChangeDrawableAttributesCookie{cookie}
@@ -2972,6 +3149,9 @@ func ChangeDrawableAttributes(c *xgb.Conn, Drawable Drawable, NumAttribs uint32,
 // ChangeDrawableAttributesChecked sends a checked request.
 // If an error occurs, it can be retrieved using ChangeDrawableAttributesCookie.Check()
 func ChangeDrawableAttributesChecked(c *xgb.Conn, Drawable Drawable, NumAttribs uint32, Attribs []uint32) ChangeDrawableAttributesCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'ChangeDrawableAttributes' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(changeDrawableAttributesRequest(c, Drawable, NumAttribs, Attribs), cookie)
 	return ChangeDrawableAttributesCookie{cookie}
@@ -3022,6 +3202,9 @@ type CreateWindowCookie struct {
 // CreateWindow sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateWindow(c *xgb.Conn, Screen uint32, Fbconfig Fbconfig, Window xproto.Window, GlxWindow Window, NumAttribs uint32, Attribs []uint32) CreateWindowCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'CreateWindow' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createWindowRequest(c, Screen, Fbconfig, Window, GlxWindow, NumAttribs, Attribs), cookie)
 	return CreateWindowCookie{cookie}
@@ -3030,6 +3213,9 @@ func CreateWindow(c *xgb.Conn, Screen uint32, Fbconfig Fbconfig, Window xproto.W
 // CreateWindowChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreateWindowCookie.Check()
 func CreateWindowChecked(c *xgb.Conn, Screen uint32, Fbconfig Fbconfig, Window xproto.Window, GlxWindow Window, NumAttribs uint32, Attribs []uint32) CreateWindowCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'CreateWindow' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createWindowRequest(c, Screen, Fbconfig, Window, GlxWindow, NumAttribs, Attribs), cookie)
 	return CreateWindowCookie{cookie}
@@ -3089,6 +3275,9 @@ type DeleteWindowCookie struct {
 // DeleteWindow sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func DeleteWindow(c *xgb.Conn, Glxwindow Window) DeleteWindowCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'DeleteWindow' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(deleteWindowRequest(c, Glxwindow), cookie)
 	return DeleteWindowCookie{cookie}
@@ -3097,6 +3286,9 @@ func DeleteWindow(c *xgb.Conn, Glxwindow Window) DeleteWindowCookie {
 // DeleteWindowChecked sends a checked request.
 // If an error occurs, it can be retrieved using DeleteWindowCookie.Check()
 func DeleteWindowChecked(c *xgb.Conn, Glxwindow Window) DeleteWindowCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'DeleteWindow' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(deleteWindowRequest(c, Glxwindow), cookie)
 	return DeleteWindowCookie{cookie}
@@ -3138,6 +3330,9 @@ type SetClientInfoARBCookie struct {
 // SetClientInfoARB sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetClientInfoARB(c *xgb.Conn, MajorVersion uint32, MinorVersion uint32, NumVersions uint32, GlStrLen uint32, GlxStrLen uint32, GlVersions []uint32, GlExtensionString string, GlxExtensionString string) SetClientInfoARBCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'SetClientInfoARB' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setClientInfoARBRequest(c, MajorVersion, MinorVersion, NumVersions, GlStrLen, GlxStrLen, GlVersions, GlExtensionString, GlxExtensionString), cookie)
 	return SetClientInfoARBCookie{cookie}
@@ -3146,6 +3341,9 @@ func SetClientInfoARB(c *xgb.Conn, MajorVersion uint32, MinorVersion uint32, Num
 // SetClientInfoARBChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetClientInfoARBCookie.Check()
 func SetClientInfoARBChecked(c *xgb.Conn, MajorVersion uint32, MinorVersion uint32, NumVersions uint32, GlStrLen uint32, GlxStrLen uint32, GlVersions []uint32, GlExtensionString string, GlxExtensionString string) SetClientInfoARBCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'SetClientInfoARB' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setClientInfoARBRequest(c, MajorVersion, MinorVersion, NumVersions, GlStrLen, GlxStrLen, GlVersions, GlExtensionString, GlxExtensionString), cookie)
 	return SetClientInfoARBCookie{cookie}
@@ -3211,6 +3409,9 @@ type CreateContextAttribsARBCookie struct {
 // CreateContextAttribsARB sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateContextAttribsARB(c *xgb.Conn, Context Context, Fbconfig Fbconfig, Screen uint32, ShareList Context, IsDirect bool, NumAttribs uint32, Attribs []uint32) CreateContextAttribsARBCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'CreateContextAttribsARB' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createContextAttribsARBRequest(c, Context, Fbconfig, Screen, ShareList, IsDirect, NumAttribs, Attribs), cookie)
 	return CreateContextAttribsARBCookie{cookie}
@@ -3219,6 +3420,9 @@ func CreateContextAttribsARB(c *xgb.Conn, Context Context, Fbconfig Fbconfig, Sc
 // CreateContextAttribsARBChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreateContextAttribsARBCookie.Check()
 func CreateContextAttribsARBChecked(c *xgb.Conn, Context Context, Fbconfig Fbconfig, Screen uint32, ShareList Context, IsDirect bool, NumAttribs uint32, Attribs []uint32) CreateContextAttribsARBCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'CreateContextAttribsARB' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createContextAttribsARBRequest(c, Context, Fbconfig, Screen, ShareList, IsDirect, NumAttribs, Attribs), cookie)
 	return CreateContextAttribsARBCookie{cookie}
@@ -3287,6 +3491,9 @@ type SetClientInfo2ARBCookie struct {
 // SetClientInfo2ARB sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetClientInfo2ARB(c *xgb.Conn, MajorVersion uint32, MinorVersion uint32, NumVersions uint32, GlStrLen uint32, GlxStrLen uint32, GlVersions []uint32, GlExtensionString string, GlxExtensionString string) SetClientInfo2ARBCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'SetClientInfo2ARB' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setClientInfo2ARBRequest(c, MajorVersion, MinorVersion, NumVersions, GlStrLen, GlxStrLen, GlVersions, GlExtensionString, GlxExtensionString), cookie)
 	return SetClientInfo2ARBCookie{cookie}
@@ -3295,6 +3502,9 @@ func SetClientInfo2ARB(c *xgb.Conn, MajorVersion uint32, MinorVersion uint32, Nu
 // SetClientInfo2ARBChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetClientInfo2ARBCookie.Check()
 func SetClientInfo2ARBChecked(c *xgb.Conn, MajorVersion uint32, MinorVersion uint32, NumVersions uint32, GlStrLen uint32, GlxStrLen uint32, GlVersions []uint32, GlExtensionString string, GlxExtensionString string) SetClientInfo2ARBCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'SetClientInfo2ARB' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setClientInfo2ARBRequest(c, MajorVersion, MinorVersion, NumVersions, GlStrLen, GlxStrLen, GlVersions, GlExtensionString, GlxExtensionString), cookie)
 	return SetClientInfo2ARBCookie{cookie}
@@ -3360,6 +3570,9 @@ type NewListCookie struct {
 // NewList sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func NewList(c *xgb.Conn, ContextTag ContextTag, List uint32, Mode uint32) NewListCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'NewList' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(newListRequest(c, ContextTag, List, Mode), cookie)
 	return NewListCookie{cookie}
@@ -3368,6 +3581,9 @@ func NewList(c *xgb.Conn, ContextTag ContextTag, List uint32, Mode uint32) NewLi
 // NewListChecked sends a checked request.
 // If an error occurs, it can be retrieved using NewListCookie.Check()
 func NewListChecked(c *xgb.Conn, ContextTag ContextTag, List uint32, Mode uint32) NewListCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'NewList' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(newListRequest(c, ContextTag, List, Mode), cookie)
 	return NewListCookie{cookie}
@@ -3415,6 +3631,9 @@ type EndListCookie struct {
 // EndList sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func EndList(c *xgb.Conn, ContextTag ContextTag) EndListCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'EndList' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(endListRequest(c, ContextTag), cookie)
 	return EndListCookie{cookie}
@@ -3423,6 +3642,9 @@ func EndList(c *xgb.Conn, ContextTag ContextTag) EndListCookie {
 // EndListChecked sends a checked request.
 // If an error occurs, it can be retrieved using EndListCookie.Check()
 func EndListChecked(c *xgb.Conn, ContextTag ContextTag) EndListCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'EndList' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(endListRequest(c, ContextTag), cookie)
 	return EndListCookie{cookie}
@@ -3464,6 +3686,9 @@ type DeleteListsCookie struct {
 // DeleteLists sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func DeleteLists(c *xgb.Conn, ContextTag ContextTag, List uint32, Range int32) DeleteListsCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'DeleteLists' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(deleteListsRequest(c, ContextTag, List, Range), cookie)
 	return DeleteListsCookie{cookie}
@@ -3472,6 +3697,9 @@ func DeleteLists(c *xgb.Conn, ContextTag ContextTag, List uint32, Range int32) D
 // DeleteListsChecked sends a checked request.
 // If an error occurs, it can be retrieved using DeleteListsCookie.Check()
 func DeleteListsChecked(c *xgb.Conn, ContextTag ContextTag, List uint32, Range int32) DeleteListsCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'DeleteLists' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(deleteListsRequest(c, ContextTag, List, Range), cookie)
 	return DeleteListsCookie{cookie}
@@ -3519,6 +3747,9 @@ type GenListsCookie struct {
 // GenLists sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GenListsCookie.Reply()
 func GenLists(c *xgb.Conn, ContextTag ContextTag, Range int32) GenListsCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GenLists' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(genListsRequest(c, ContextTag, Range), cookie)
 	return GenListsCookie{cookie}
@@ -3527,6 +3758,9 @@ func GenLists(c *xgb.Conn, ContextTag ContextTag, Range int32) GenListsCookie {
 // GenListsUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GenListsUnchecked(c *xgb.Conn, ContextTag ContextTag, Range int32) GenListsCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GenLists' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(genListsRequest(c, ContextTag, Range), cookie)
 	return GenListsCookie{cookie}
@@ -3604,6 +3838,9 @@ type FeedbackBufferCookie struct {
 // FeedbackBuffer sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func FeedbackBuffer(c *xgb.Conn, ContextTag ContextTag, Size int32, Type int32) FeedbackBufferCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'FeedbackBuffer' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(feedbackBufferRequest(c, ContextTag, Size, Type), cookie)
 	return FeedbackBufferCookie{cookie}
@@ -3612,6 +3849,9 @@ func FeedbackBuffer(c *xgb.Conn, ContextTag ContextTag, Size int32, Type int32)
 // FeedbackBufferChecked sends a checked request.
 // If an error occurs, it can be retrieved using FeedbackBufferCookie.Check()
 func FeedbackBufferChecked(c *xgb.Conn, ContextTag ContextTag, Size int32, Type int32) FeedbackBufferCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'FeedbackBuffer' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(feedbackBufferRequest(c, ContextTag, Size, Type), cookie)
 	return FeedbackBufferCookie{cookie}
@@ -3659,6 +3899,9 @@ type SelectBufferCookie struct {
 // SelectBuffer sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SelectBuffer(c *xgb.Conn, ContextTag ContextTag, Size int32) SelectBufferCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'SelectBuffer' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(selectBufferRequest(c, ContextTag, Size), cookie)
 	return SelectBufferCookie{cookie}
@@ -3667,6 +3910,9 @@ func SelectBuffer(c *xgb.Conn, ContextTag ContextTag, Size int32) SelectBufferCo
 // SelectBufferChecked sends a checked request.
 // If an error occurs, it can be retrieved using SelectBufferCookie.Check()
 func SelectBufferChecked(c *xgb.Conn, ContextTag ContextTag, Size int32) SelectBufferCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'SelectBuffer' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(selectBufferRequest(c, ContextTag, Size), cookie)
 	return SelectBufferCookie{cookie}
@@ -3711,6 +3957,9 @@ type RenderModeCookie struct {
 // RenderMode sends a checked request.
 // If an error occurs, it will be returned with the reply by calling RenderModeCookie.Reply()
 func RenderMode(c *xgb.Conn, ContextTag ContextTag, Mode uint32) RenderModeCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'RenderMode' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(renderModeRequest(c, ContextTag, Mode), cookie)
 	return RenderModeCookie{cookie}
@@ -3719,6 +3968,9 @@ func RenderMode(c *xgb.Conn, ContextTag ContextTag, Mode uint32) RenderModeCooki
 // RenderModeUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func RenderModeUnchecked(c *xgb.Conn, ContextTag ContextTag, Mode uint32) RenderModeCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'RenderMode' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(renderModeRequest(c, ContextTag, Mode), cookie)
 	return RenderModeCookie{cookie}
@@ -3815,6 +4067,9 @@ type FinishCookie struct {
 // Finish sends a checked request.
 // If an error occurs, it will be returned with the reply by calling FinishCookie.Reply()
 func Finish(c *xgb.Conn, ContextTag ContextTag) FinishCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'Finish' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(finishRequest(c, ContextTag), cookie)
 	return FinishCookie{cookie}
@@ -3823,6 +4078,9 @@ func Finish(c *xgb.Conn, ContextTag ContextTag) FinishCookie {
 // FinishUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func FinishUnchecked(c *xgb.Conn, ContextTag ContextTag) FinishCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'Finish' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(finishRequest(c, ContextTag), cookie)
 	return FinishCookie{cookie}
@@ -3893,6 +4151,9 @@ type PixelStorefCookie struct {
 // PixelStoref sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PixelStoref(c *xgb.Conn, ContextTag ContextTag, Pname uint32, Datum Float32) PixelStorefCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'PixelStoref' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(pixelStorefRequest(c, ContextTag, Pname, Datum), cookie)
 	return PixelStorefCookie{cookie}
@@ -3901,6 +4162,9 @@ func PixelStoref(c *xgb.Conn, ContextTag ContextTag, Pname uint32, Datum Float32
 // PixelStorefChecked sends a checked request.
 // If an error occurs, it can be retrieved using PixelStorefCookie.Check()
 func PixelStorefChecked(c *xgb.Conn, ContextTag ContextTag, Pname uint32, Datum Float32) PixelStorefCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'PixelStoref' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(pixelStorefRequest(c, ContextTag, Pname, Datum), cookie)
 	return PixelStorefCookie{cookie}
@@ -3948,6 +4212,9 @@ type PixelStoreiCookie struct {
 // PixelStorei sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PixelStorei(c *xgb.Conn, ContextTag ContextTag, Pname uint32, Datum int32) PixelStoreiCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'PixelStorei' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(pixelStoreiRequest(c, ContextTag, Pname, Datum), cookie)
 	return PixelStoreiCookie{cookie}
@@ -3956,6 +4223,9 @@ func PixelStorei(c *xgb.Conn, ContextTag ContextTag, Pname uint32, Datum int32)
 // PixelStoreiChecked sends a checked request.
 // If an error occurs, it can be retrieved using PixelStoreiCookie.Check()
 func PixelStoreiChecked(c *xgb.Conn, ContextTag ContextTag, Pname uint32, Datum int32) PixelStoreiCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'PixelStorei' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(pixelStoreiRequest(c, ContextTag, Pname, Datum), cookie)
 	return PixelStoreiCookie{cookie}
@@ -4003,6 +4273,9 @@ type ReadPixelsCookie struct {
 // ReadPixels sends a checked request.
 // If an error occurs, it will be returned with the reply by calling ReadPixelsCookie.Reply()
 func ReadPixels(c *xgb.Conn, ContextTag ContextTag, X int32, Y int32, Width int32, Height int32, Format uint32, Type uint32, SwapBytes bool, LsbFirst bool) ReadPixelsCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'ReadPixels' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(readPixelsRequest(c, ContextTag, X, Y, Width, Height, Format, Type, SwapBytes, LsbFirst), cookie)
 	return ReadPixelsCookie{cookie}
@@ -4011,6 +4284,9 @@ func ReadPixels(c *xgb.Conn, ContextTag ContextTag, X int32, Y int32, Width int3
 // ReadPixelsUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ReadPixelsUnchecked(c *xgb.Conn, ContextTag ContextTag, X int32, Y int32, Width int32, Height int32, Format uint32, Type uint32, SwapBytes bool, LsbFirst bool) ReadPixelsCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'ReadPixels' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(readPixelsRequest(c, ContextTag, X, Y, Width, Height, Format, Type, SwapBytes, LsbFirst), cookie)
 	return ReadPixelsCookie{cookie}
@@ -4121,6 +4397,9 @@ type GetBooleanvCookie struct {
 // GetBooleanv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetBooleanvCookie.Reply()
 func GetBooleanv(c *xgb.Conn, ContextTag ContextTag, Pname int32) GetBooleanvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetBooleanv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getBooleanvRequest(c, ContextTag, Pname), cookie)
 	return GetBooleanvCookie{cookie}
@@ -4129,6 +4408,9 @@ func GetBooleanv(c *xgb.Conn, ContextTag ContextTag, Pname int32) GetBooleanvCoo
 // GetBooleanvUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetBooleanvUnchecked(c *xgb.Conn, ContextTag ContextTag, Pname int32) GetBooleanvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetBooleanv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getBooleanvRequest(c, ContextTag, Pname), cookie)
 	return GetBooleanvCookie{cookie}
@@ -4232,6 +4514,9 @@ type GetClipPlaneCookie struct {
 // GetClipPlane sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetClipPlaneCookie.Reply()
 func GetClipPlane(c *xgb.Conn, ContextTag ContextTag, Plane int32) GetClipPlaneCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetClipPlane' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getClipPlaneRequest(c, ContextTag, Plane), cookie)
 	return GetClipPlaneCookie{cookie}
@@ -4240,6 +4525,9 @@ func GetClipPlane(c *xgb.Conn, ContextTag ContextTag, Plane int32) GetClipPlaneC
 // GetClipPlaneUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetClipPlaneUnchecked(c *xgb.Conn, ContextTag ContextTag, Plane int32) GetClipPlaneCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetClipPlane' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getClipPlaneRequest(c, ContextTag, Plane), cookie)
 	return GetClipPlaneCookie{cookie}
@@ -4324,6 +4612,9 @@ type GetDoublevCookie struct {
 // GetDoublev sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetDoublevCookie.Reply()
 func GetDoublev(c *xgb.Conn, ContextTag ContextTag, Pname uint32) GetDoublevCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetDoublev' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getDoublevRequest(c, ContextTag, Pname), cookie)
 	return GetDoublevCookie{cookie}
@@ -4332,6 +4623,9 @@ func GetDoublev(c *xgb.Conn, ContextTag ContextTag, Pname uint32) GetDoublevCook
 // GetDoublevUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetDoublevUnchecked(c *xgb.Conn, ContextTag ContextTag, Pname uint32) GetDoublevCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetDoublev' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getDoublevRequest(c, ContextTag, Pname), cookie)
 	return GetDoublevCookie{cookie}
@@ -4427,6 +4721,9 @@ type GetErrorCookie struct {
 // GetError sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetErrorCookie.Reply()
 func GetError(c *xgb.Conn, ContextTag ContextTag) GetErrorCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetError' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getErrorRequest(c, ContextTag), cookie)
 	return GetErrorCookie{cookie}
@@ -4435,6 +4732,9 @@ func GetError(c *xgb.Conn, ContextTag ContextTag) GetErrorCookie {
 // GetErrorUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetErrorUnchecked(c *xgb.Conn, ContextTag ContextTag) GetErrorCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetError' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getErrorRequest(c, ContextTag), cookie)
 	return GetErrorCookie{cookie}
@@ -4509,6 +4809,9 @@ type GetFloatvCookie struct {
 // GetFloatv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetFloatvCookie.Reply()
 func GetFloatv(c *xgb.Conn, ContextTag ContextTag, Pname uint32) GetFloatvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetFloatv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getFloatvRequest(c, ContextTag, Pname), cookie)
 	return GetFloatvCookie{cookie}
@@ -4517,6 +4820,9 @@ func GetFloatv(c *xgb.Conn, ContextTag ContextTag, Pname uint32) GetFloatvCookie
 // GetFloatvUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetFloatvUnchecked(c *xgb.Conn, ContextTag ContextTag, Pname uint32) GetFloatvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetFloatv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getFloatvRequest(c, ContextTag, Pname), cookie)
 	return GetFloatvCookie{cookie}
@@ -4612,6 +4918,9 @@ type GetIntegervCookie struct {
 // GetIntegerv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetIntegervCookie.Reply()
 func GetIntegerv(c *xgb.Conn, ContextTag ContextTag, Pname uint32) GetIntegervCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetIntegerv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getIntegervRequest(c, ContextTag, Pname), cookie)
 	return GetIntegervCookie{cookie}
@@ -4620,6 +4929,9 @@ func GetIntegerv(c *xgb.Conn, ContextTag ContextTag, Pname uint32) GetIntegervCo
 // GetIntegervUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetIntegervUnchecked(c *xgb.Conn, ContextTag ContextTag, Pname uint32) GetIntegervCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetIntegerv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getIntegervRequest(c, ContextTag, Pname), cookie)
 	return GetIntegervCookie{cookie}
@@ -4715,6 +5027,9 @@ type GetLightfvCookie struct {
 // GetLightfv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetLightfvCookie.Reply()
 func GetLightfv(c *xgb.Conn, ContextTag ContextTag, Light uint32, Pname uint32) GetLightfvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetLightfv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getLightfvRequest(c, ContextTag, Light, Pname), cookie)
 	return GetLightfvCookie{cookie}
@@ -4723,6 +5038,9 @@ func GetLightfv(c *xgb.Conn, ContextTag ContextTag, Light uint32, Pname uint32)
 // GetLightfvUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetLightfvUnchecked(c *xgb.Conn, ContextTag ContextTag, Light uint32, Pname uint32) GetLightfvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetLightfv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getLightfvRequest(c, ContextTag, Light, Pname), cookie)
 	return GetLightfvCookie{cookie}
@@ -4821,6 +5139,9 @@ type GetLightivCookie struct {
 // GetLightiv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetLightivCookie.Reply()
 func GetLightiv(c *xgb.Conn, ContextTag ContextTag, Light uint32, Pname uint32) GetLightivCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetLightiv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getLightivRequest(c, ContextTag, Light, Pname), cookie)
 	return GetLightivCookie{cookie}
@@ -4829,6 +5150,9 @@ func GetLightiv(c *xgb.Conn, ContextTag ContextTag, Light uint32, Pname uint32)
 // GetLightivUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetLightivUnchecked(c *xgb.Conn, ContextTag ContextTag, Light uint32, Pname uint32) GetLightivCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetLightiv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getLightivRequest(c, ContextTag, Light, Pname), cookie)
 	return GetLightivCookie{cookie}
@@ -4927,6 +5251,9 @@ type GetMapdvCookie struct {
 // GetMapdv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetMapdvCookie.Reply()
 func GetMapdv(c *xgb.Conn, ContextTag ContextTag, Target uint32, Query uint32) GetMapdvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetMapdv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getMapdvRequest(c, ContextTag, Target, Query), cookie)
 	return GetMapdvCookie{cookie}
@@ -4935,6 +5262,9 @@ func GetMapdv(c *xgb.Conn, ContextTag ContextTag, Target uint32, Query uint32) G
 // GetMapdvUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetMapdvUnchecked(c *xgb.Conn, ContextTag ContextTag, Target uint32, Query uint32) GetMapdvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetMapdv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getMapdvRequest(c, ContextTag, Target, Query), cookie)
 	return GetMapdvCookie{cookie}
@@ -5033,6 +5363,9 @@ type GetMapfvCookie struct {
 // GetMapfv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetMapfvCookie.Reply()
 func GetMapfv(c *xgb.Conn, ContextTag ContextTag, Target uint32, Query uint32) GetMapfvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetMapfv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getMapfvRequest(c, ContextTag, Target, Query), cookie)
 	return GetMapfvCookie{cookie}
@@ -5041,6 +5374,9 @@ func GetMapfv(c *xgb.Conn, ContextTag ContextTag, Target uint32, Query uint32) G
 // GetMapfvUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetMapfvUnchecked(c *xgb.Conn, ContextTag ContextTag, Target uint32, Query uint32) GetMapfvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetMapfv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getMapfvRequest(c, ContextTag, Target, Query), cookie)
 	return GetMapfvCookie{cookie}
@@ -5139,6 +5475,9 @@ type GetMapivCookie struct {
 // GetMapiv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetMapivCookie.Reply()
 func GetMapiv(c *xgb.Conn, ContextTag ContextTag, Target uint32, Query uint32) GetMapivCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetMapiv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getMapivRequest(c, ContextTag, Target, Query), cookie)
 	return GetMapivCookie{cookie}
@@ -5147,6 +5486,9 @@ func GetMapiv(c *xgb.Conn, ContextTag ContextTag, Target uint32, Query uint32) G
 // GetMapivUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetMapivUnchecked(c *xgb.Conn, ContextTag ContextTag, Target uint32, Query uint32) GetMapivCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetMapiv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getMapivRequest(c, ContextTag, Target, Query), cookie)
 	return GetMapivCookie{cookie}
@@ -5245,6 +5587,9 @@ type GetMaterialfvCookie struct {
 // GetMaterialfv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetMaterialfvCookie.Reply()
 func GetMaterialfv(c *xgb.Conn, ContextTag ContextTag, Face uint32, Pname uint32) GetMaterialfvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetMaterialfv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getMaterialfvRequest(c, ContextTag, Face, Pname), cookie)
 	return GetMaterialfvCookie{cookie}
@@ -5253,6 +5598,9 @@ func GetMaterialfv(c *xgb.Conn, ContextTag ContextTag, Face uint32, Pname uint32
 // GetMaterialfvUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetMaterialfvUnchecked(c *xgb.Conn, ContextTag ContextTag, Face uint32, Pname uint32) GetMaterialfvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetMaterialfv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getMaterialfvRequest(c, ContextTag, Face, Pname), cookie)
 	return GetMaterialfvCookie{cookie}
@@ -5351,6 +5699,9 @@ type GetMaterialivCookie struct {
 // GetMaterialiv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetMaterialivCookie.Reply()
 func GetMaterialiv(c *xgb.Conn, ContextTag ContextTag, Face uint32, Pname uint32) GetMaterialivCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetMaterialiv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getMaterialivRequest(c, ContextTag, Face, Pname), cookie)
 	return GetMaterialivCookie{cookie}
@@ -5359,6 +5710,9 @@ func GetMaterialiv(c *xgb.Conn, ContextTag ContextTag, Face uint32, Pname uint32
 // GetMaterialivUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetMaterialivUnchecked(c *xgb.Conn, ContextTag ContextTag, Face uint32, Pname uint32) GetMaterialivCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetMaterialiv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getMaterialivRequest(c, ContextTag, Face, Pname), cookie)
 	return GetMaterialivCookie{cookie}
@@ -5457,6 +5811,9 @@ type GetPixelMapfvCookie struct {
 // GetPixelMapfv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetPixelMapfvCookie.Reply()
 func GetPixelMapfv(c *xgb.Conn, ContextTag ContextTag, Map uint32) GetPixelMapfvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetPixelMapfv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getPixelMapfvRequest(c, ContextTag, Map), cookie)
 	return GetPixelMapfvCookie{cookie}
@@ -5465,6 +5822,9 @@ func GetPixelMapfv(c *xgb.Conn, ContextTag ContextTag, Map uint32) GetPixelMapfv
 // GetPixelMapfvUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetPixelMapfvUnchecked(c *xgb.Conn, ContextTag ContextTag, Map uint32) GetPixelMapfvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetPixelMapfv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getPixelMapfvRequest(c, ContextTag, Map), cookie)
 	return GetPixelMapfvCookie{cookie}
@@ -5560,6 +5920,9 @@ type GetPixelMapuivCookie struct {
 // GetPixelMapuiv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetPixelMapuivCookie.Reply()
 func GetPixelMapuiv(c *xgb.Conn, ContextTag ContextTag, Map uint32) GetPixelMapuivCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetPixelMapuiv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getPixelMapuivRequest(c, ContextTag, Map), cookie)
 	return GetPixelMapuivCookie{cookie}
@@ -5568,6 +5931,9 @@ func GetPixelMapuiv(c *xgb.Conn, ContextTag ContextTag, Map uint32) GetPixelMapu
 // GetPixelMapuivUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetPixelMapuivUnchecked(c *xgb.Conn, ContextTag ContextTag, Map uint32) GetPixelMapuivCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetPixelMapuiv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getPixelMapuivRequest(c, ContextTag, Map), cookie)
 	return GetPixelMapuivCookie{cookie}
@@ -5663,6 +6029,9 @@ type GetPixelMapusvCookie struct {
 // GetPixelMapusv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetPixelMapusvCookie.Reply()
 func GetPixelMapusv(c *xgb.Conn, ContextTag ContextTag, Map uint32) GetPixelMapusvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetPixelMapusv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getPixelMapusvRequest(c, ContextTag, Map), cookie)
 	return GetPixelMapusvCookie{cookie}
@@ -5671,6 +6040,9 @@ func GetPixelMapusv(c *xgb.Conn, ContextTag ContextTag, Map uint32) GetPixelMapu
 // GetPixelMapusvUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetPixelMapusvUnchecked(c *xgb.Conn, ContextTag ContextTag, Map uint32) GetPixelMapusvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetPixelMapusv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getPixelMapusvRequest(c, ContextTag, Map), cookie)
 	return GetPixelMapusvCookie{cookie}
@@ -5766,6 +6138,9 @@ type GetPolygonStippleCookie struct {
 // GetPolygonStipple sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetPolygonStippleCookie.Reply()
 func GetPolygonStipple(c *xgb.Conn, ContextTag ContextTag, LsbFirst bool) GetPolygonStippleCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetPolygonStipple' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getPolygonStippleRequest(c, ContextTag, LsbFirst), cookie)
 	return GetPolygonStippleCookie{cookie}
@@ -5774,6 +6149,9 @@ func GetPolygonStipple(c *xgb.Conn, ContextTag ContextTag, LsbFirst bool) GetPol
 // GetPolygonStippleUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetPolygonStippleUnchecked(c *xgb.Conn, ContextTag ContextTag, LsbFirst bool) GetPolygonStippleCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetPolygonStipple' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getPolygonStippleRequest(c, ContextTag, LsbFirst), cookie)
 	return GetPolygonStippleCookie{cookie}
@@ -5859,6 +6237,9 @@ type GetStringCookie struct {
 // GetString sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetStringCookie.Reply()
 func GetString(c *xgb.Conn, ContextTag ContextTag, Name uint32) GetStringCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetString' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getStringRequest(c, ContextTag, Name), cookie)
 	return GetStringCookie{cookie}
@@ -5867,6 +6248,9 @@ func GetString(c *xgb.Conn, ContextTag ContextTag, Name uint32) GetStringCookie
 // GetStringUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetStringUnchecked(c *xgb.Conn, ContextTag ContextTag, Name uint32) GetStringCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetString' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getStringRequest(c, ContextTag, Name), cookie)
 	return GetStringCookie{cookie}
@@ -5958,6 +6342,9 @@ type GetTexEnvfvCookie struct {
 // GetTexEnvfv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetTexEnvfvCookie.Reply()
 func GetTexEnvfv(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname uint32) GetTexEnvfvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetTexEnvfv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getTexEnvfvRequest(c, ContextTag, Target, Pname), cookie)
 	return GetTexEnvfvCookie{cookie}
@@ -5966,6 +6353,9 @@ func GetTexEnvfv(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname uint32
 // GetTexEnvfvUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetTexEnvfvUnchecked(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname uint32) GetTexEnvfvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetTexEnvfv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getTexEnvfvRequest(c, ContextTag, Target, Pname), cookie)
 	return GetTexEnvfvCookie{cookie}
@@ -6064,6 +6454,9 @@ type GetTexEnvivCookie struct {
 // GetTexEnviv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetTexEnvivCookie.Reply()
 func GetTexEnviv(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname uint32) GetTexEnvivCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetTexEnviv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getTexEnvivRequest(c, ContextTag, Target, Pname), cookie)
 	return GetTexEnvivCookie{cookie}
@@ -6072,6 +6465,9 @@ func GetTexEnviv(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname uint32
 // GetTexEnvivUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetTexEnvivUnchecked(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname uint32) GetTexEnvivCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetTexEnviv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getTexEnvivRequest(c, ContextTag, Target, Pname), cookie)
 	return GetTexEnvivCookie{cookie}
@@ -6170,6 +6566,9 @@ type GetTexGendvCookie struct {
 // GetTexGendv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetTexGendvCookie.Reply()
 func GetTexGendv(c *xgb.Conn, ContextTag ContextTag, Coord uint32, Pname uint32) GetTexGendvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetTexGendv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getTexGendvRequest(c, ContextTag, Coord, Pname), cookie)
 	return GetTexGendvCookie{cookie}
@@ -6178,6 +6577,9 @@ func GetTexGendv(c *xgb.Conn, ContextTag ContextTag, Coord uint32, Pname uint32)
 // GetTexGendvUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetTexGendvUnchecked(c *xgb.Conn, ContextTag ContextTag, Coord uint32, Pname uint32) GetTexGendvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetTexGendv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getTexGendvRequest(c, ContextTag, Coord, Pname), cookie)
 	return GetTexGendvCookie{cookie}
@@ -6276,6 +6678,9 @@ type GetTexGenfvCookie struct {
 // GetTexGenfv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetTexGenfvCookie.Reply()
 func GetTexGenfv(c *xgb.Conn, ContextTag ContextTag, Coord uint32, Pname uint32) GetTexGenfvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetTexGenfv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getTexGenfvRequest(c, ContextTag, Coord, Pname), cookie)
 	return GetTexGenfvCookie{cookie}
@@ -6284,6 +6689,9 @@ func GetTexGenfv(c *xgb.Conn, ContextTag ContextTag, Coord uint32, Pname uint32)
 // GetTexGenfvUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetTexGenfvUnchecked(c *xgb.Conn, ContextTag ContextTag, Coord uint32, Pname uint32) GetTexGenfvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetTexGenfv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getTexGenfvRequest(c, ContextTag, Coord, Pname), cookie)
 	return GetTexGenfvCookie{cookie}
@@ -6382,6 +6790,9 @@ type GetTexGenivCookie struct {
 // GetTexGeniv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetTexGenivCookie.Reply()
 func GetTexGeniv(c *xgb.Conn, ContextTag ContextTag, Coord uint32, Pname uint32) GetTexGenivCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetTexGeniv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getTexGenivRequest(c, ContextTag, Coord, Pname), cookie)
 	return GetTexGenivCookie{cookie}
@@ -6390,6 +6801,9 @@ func GetTexGeniv(c *xgb.Conn, ContextTag ContextTag, Coord uint32, Pname uint32)
 // GetTexGenivUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetTexGenivUnchecked(c *xgb.Conn, ContextTag ContextTag, Coord uint32, Pname uint32) GetTexGenivCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetTexGeniv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getTexGenivRequest(c, ContextTag, Coord, Pname), cookie)
 	return GetTexGenivCookie{cookie}
@@ -6488,6 +6902,9 @@ type GetTexImageCookie struct {
 // GetTexImage sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetTexImageCookie.Reply()
 func GetTexImage(c *xgb.Conn, ContextTag ContextTag, Target uint32, Level int32, Format uint32, Type uint32, SwapBytes bool) GetTexImageCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetTexImage' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getTexImageRequest(c, ContextTag, Target, Level, Format, Type, SwapBytes), cookie)
 	return GetTexImageCookie{cookie}
@@ -6496,6 +6913,9 @@ func GetTexImage(c *xgb.Conn, ContextTag ContextTag, Target uint32, Level int32,
 // GetTexImageUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetTexImageUnchecked(c *xgb.Conn, ContextTag ContextTag, Target uint32, Level int32, Format uint32, Type uint32, SwapBytes bool) GetTexImageCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetTexImage' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getTexImageRequest(c, ContextTag, Target, Level, Format, Type, SwapBytes), cookie)
 	return GetTexImageCookie{cookie}
@@ -6608,6 +7028,9 @@ type GetTexParameterfvCookie struct {
 // GetTexParameterfv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetTexParameterfvCookie.Reply()
 func GetTexParameterfv(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname uint32) GetTexParameterfvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetTexParameterfv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getTexParameterfvRequest(c, ContextTag, Target, Pname), cookie)
 	return GetTexParameterfvCookie{cookie}
@@ -6616,6 +7039,9 @@ func GetTexParameterfv(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname
 // GetTexParameterfvUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetTexParameterfvUnchecked(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname uint32) GetTexParameterfvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetTexParameterfv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getTexParameterfvRequest(c, ContextTag, Target, Pname), cookie)
 	return GetTexParameterfvCookie{cookie}
@@ -6714,6 +7140,9 @@ type GetTexParameterivCookie struct {
 // GetTexParameteriv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetTexParameterivCookie.Reply()
 func GetTexParameteriv(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname uint32) GetTexParameterivCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetTexParameteriv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getTexParameterivRequest(c, ContextTag, Target, Pname), cookie)
 	return GetTexParameterivCookie{cookie}
@@ -6722,6 +7151,9 @@ func GetTexParameteriv(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname
 // GetTexParameterivUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetTexParameterivUnchecked(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname uint32) GetTexParameterivCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetTexParameteriv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getTexParameterivRequest(c, ContextTag, Target, Pname), cookie)
 	return GetTexParameterivCookie{cookie}
@@ -6820,6 +7252,9 @@ type GetTexLevelParameterfvCookie struct {
 // GetTexLevelParameterfv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetTexLevelParameterfvCookie.Reply()
 func GetTexLevelParameterfv(c *xgb.Conn, ContextTag ContextTag, Target uint32, Level int32, Pname uint32) GetTexLevelParameterfvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetTexLevelParameterfv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getTexLevelParameterfvRequest(c, ContextTag, Target, Level, Pname), cookie)
 	return GetTexLevelParameterfvCookie{cookie}
@@ -6828,6 +7263,9 @@ func GetTexLevelParameterfv(c *xgb.Conn, ContextTag ContextTag, Target uint32, L
 // GetTexLevelParameterfvUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetTexLevelParameterfvUnchecked(c *xgb.Conn, ContextTag ContextTag, Target uint32, Level int32, Pname uint32) GetTexLevelParameterfvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetTexLevelParameterfv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getTexLevelParameterfvRequest(c, ContextTag, Target, Level, Pname), cookie)
 	return GetTexLevelParameterfvCookie{cookie}
@@ -6929,6 +7367,9 @@ type GetTexLevelParameterivCookie struct {
 // GetTexLevelParameteriv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetTexLevelParameterivCookie.Reply()
 func GetTexLevelParameteriv(c *xgb.Conn, ContextTag ContextTag, Target uint32, Level int32, Pname uint32) GetTexLevelParameterivCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetTexLevelParameteriv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getTexLevelParameterivRequest(c, ContextTag, Target, Level, Pname), cookie)
 	return GetTexLevelParameterivCookie{cookie}
@@ -6937,6 +7378,9 @@ func GetTexLevelParameteriv(c *xgb.Conn, ContextTag ContextTag, Target uint32, L
 // GetTexLevelParameterivUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetTexLevelParameterivUnchecked(c *xgb.Conn, ContextTag ContextTag, Target uint32, Level int32, Pname uint32) GetTexLevelParameterivCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetTexLevelParameteriv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getTexLevelParameterivRequest(c, ContextTag, Target, Level, Pname), cookie)
 	return GetTexLevelParameterivCookie{cookie}
@@ -7038,6 +7482,9 @@ type IsListCookie struct {
 // IsList sends a checked request.
 // If an error occurs, it will be returned with the reply by calling IsListCookie.Reply()
 func IsList(c *xgb.Conn, ContextTag ContextTag, List uint32) IsListCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'IsList' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(isListRequest(c, ContextTag, List), cookie)
 	return IsListCookie{cookie}
@@ -7046,6 +7493,9 @@ func IsList(c *xgb.Conn, ContextTag ContextTag, List uint32) IsListCookie {
 // IsListUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func IsListUnchecked(c *xgb.Conn, ContextTag ContextTag, List uint32) IsListCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'IsList' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(isListRequest(c, ContextTag, List), cookie)
 	return IsListCookie{cookie}
@@ -7123,6 +7573,9 @@ type FlushCookie struct {
 // Flush sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func Flush(c *xgb.Conn, ContextTag ContextTag) FlushCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'Flush' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(flushRequest(c, ContextTag), cookie)
 	return FlushCookie{cookie}
@@ -7131,6 +7584,9 @@ func Flush(c *xgb.Conn, ContextTag ContextTag) FlushCookie {
 // FlushChecked sends a checked request.
 // If an error occurs, it can be retrieved using FlushCookie.Check()
 func FlushChecked(c *xgb.Conn, ContextTag ContextTag) FlushCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'Flush' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(flushRequest(c, ContextTag), cookie)
 	return FlushCookie{cookie}
@@ -7172,6 +7628,9 @@ type AreTexturesResidentCookie struct {
 // AreTexturesResident sends a checked request.
 // If an error occurs, it will be returned with the reply by calling AreTexturesResidentCookie.Reply()
 func AreTexturesResident(c *xgb.Conn, ContextTag ContextTag, N int32, Textures []uint32) AreTexturesResidentCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'AreTexturesResident' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(areTexturesResidentRequest(c, ContextTag, N, Textures), cookie)
 	return AreTexturesResidentCookie{cookie}
@@ -7180,6 +7639,9 @@ func AreTexturesResident(c *xgb.Conn, ContextTag ContextTag, N int32, Textures [
 // AreTexturesResidentUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func AreTexturesResidentUnchecked(c *xgb.Conn, ContextTag ContextTag, N int32, Textures []uint32) AreTexturesResidentCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'AreTexturesResident' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(areTexturesResidentRequest(c, ContextTag, N, Textures), cookie)
 	return AreTexturesResidentCookie{cookie}
@@ -7278,6 +7740,9 @@ type DeleteTexturesCookie struct {
 // DeleteTextures sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func DeleteTextures(c *xgb.Conn, ContextTag ContextTag, N int32, Textures []uint32) DeleteTexturesCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'DeleteTextures' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(deleteTexturesRequest(c, ContextTag, N, Textures), cookie)
 	return DeleteTexturesCookie{cookie}
@@ -7286,6 +7751,9 @@ func DeleteTextures(c *xgb.Conn, ContextTag ContextTag, N int32, Textures []uint
 // DeleteTexturesChecked sends a checked request.
 // If an error occurs, it can be retrieved using DeleteTexturesCookie.Check()
 func DeleteTexturesChecked(c *xgb.Conn, ContextTag ContextTag, N int32, Textures []uint32) DeleteTexturesCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'DeleteTextures' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(deleteTexturesRequest(c, ContextTag, N, Textures), cookie)
 	return DeleteTexturesCookie{cookie}
@@ -7336,6 +7804,9 @@ type GenTexturesCookie struct {
 // GenTextures sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GenTexturesCookie.Reply()
 func GenTextures(c *xgb.Conn, ContextTag ContextTag, N int32) GenTexturesCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GenTextures' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(genTexturesRequest(c, ContextTag, N), cookie)
 	return GenTexturesCookie{cookie}
@@ -7344,6 +7815,9 @@ func GenTextures(c *xgb.Conn, ContextTag ContextTag, N int32) GenTexturesCookie
 // GenTexturesUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GenTexturesUnchecked(c *xgb.Conn, ContextTag ContextTag, N int32) GenTexturesCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GenTextures' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(genTexturesRequest(c, ContextTag, N), cookie)
 	return GenTexturesCookie{cookie}
@@ -7428,6 +7902,9 @@ type IsTextureCookie struct {
 // IsTexture sends a checked request.
 // If an error occurs, it will be returned with the reply by calling IsTextureCookie.Reply()
 func IsTexture(c *xgb.Conn, ContextTag ContextTag, Texture uint32) IsTextureCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'IsTexture' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(isTextureRequest(c, ContextTag, Texture), cookie)
 	return IsTextureCookie{cookie}
@@ -7436,6 +7913,9 @@ func IsTexture(c *xgb.Conn, ContextTag ContextTag, Texture uint32) IsTextureCook
 // IsTextureUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func IsTextureUnchecked(c *xgb.Conn, ContextTag ContextTag, Texture uint32) IsTextureCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'IsTexture' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(isTextureRequest(c, ContextTag, Texture), cookie)
 	return IsTextureCookie{cookie}
@@ -7513,6 +7993,9 @@ type GetColorTableCookie struct {
 // GetColorTable sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetColorTableCookie.Reply()
 func GetColorTable(c *xgb.Conn, ContextTag ContextTag, Target uint32, Format uint32, Type uint32, SwapBytes bool) GetColorTableCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetColorTable' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getColorTableRequest(c, ContextTag, Target, Format, Type, SwapBytes), cookie)
 	return GetColorTableCookie{cookie}
@@ -7521,6 +8004,9 @@ func GetColorTable(c *xgb.Conn, ContextTag ContextTag, Target uint32, Format uin
 // GetColorTableUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetColorTableUnchecked(c *xgb.Conn, ContextTag ContextTag, Target uint32, Format uint32, Type uint32, SwapBytes bool) GetColorTableCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetColorTable' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getColorTableRequest(c, ContextTag, Target, Format, Type, SwapBytes), cookie)
 	return GetColorTableCookie{cookie}
@@ -7622,6 +8108,9 @@ type GetColorTableParameterfvCookie struct {
 // GetColorTableParameterfv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetColorTableParameterfvCookie.Reply()
 func GetColorTableParameterfv(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname uint32) GetColorTableParameterfvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetColorTableParameterfv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getColorTableParameterfvRequest(c, ContextTag, Target, Pname), cookie)
 	return GetColorTableParameterfvCookie{cookie}
@@ -7630,6 +8119,9 @@ func GetColorTableParameterfv(c *xgb.Conn, ContextTag ContextTag, Target uint32,
 // GetColorTableParameterfvUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetColorTableParameterfvUnchecked(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname uint32) GetColorTableParameterfvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetColorTableParameterfv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getColorTableParameterfvRequest(c, ContextTag, Target, Pname), cookie)
 	return GetColorTableParameterfvCookie{cookie}
@@ -7728,6 +8220,9 @@ type GetColorTableParameterivCookie struct {
 // GetColorTableParameteriv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetColorTableParameterivCookie.Reply()
 func GetColorTableParameteriv(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname uint32) GetColorTableParameterivCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetColorTableParameteriv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getColorTableParameterivRequest(c, ContextTag, Target, Pname), cookie)
 	return GetColorTableParameterivCookie{cookie}
@@ -7736,6 +8231,9 @@ func GetColorTableParameteriv(c *xgb.Conn, ContextTag ContextTag, Target uint32,
 // GetColorTableParameterivUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetColorTableParameterivUnchecked(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname uint32) GetColorTableParameterivCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetColorTableParameteriv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getColorTableParameterivRequest(c, ContextTag, Target, Pname), cookie)
 	return GetColorTableParameterivCookie{cookie}
@@ -7834,6 +8332,9 @@ type GetConvolutionFilterCookie struct {
 // GetConvolutionFilter sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetConvolutionFilterCookie.Reply()
 func GetConvolutionFilter(c *xgb.Conn, ContextTag ContextTag, Target uint32, Format uint32, Type uint32, SwapBytes bool) GetConvolutionFilterCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetConvolutionFilter' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getConvolutionFilterRequest(c, ContextTag, Target, Format, Type, SwapBytes), cookie)
 	return GetConvolutionFilterCookie{cookie}
@@ -7842,6 +8343,9 @@ func GetConvolutionFilter(c *xgb.Conn, ContextTag ContextTag, Target uint32, For
 // GetConvolutionFilterUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetConvolutionFilterUnchecked(c *xgb.Conn, ContextTag ContextTag, Target uint32, Format uint32, Type uint32, SwapBytes bool) GetConvolutionFilterCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetConvolutionFilter' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getConvolutionFilterRequest(c, ContextTag, Target, Format, Type, SwapBytes), cookie)
 	return GetConvolutionFilterCookie{cookie}
@@ -7947,6 +8451,9 @@ type GetConvolutionParameterfvCookie struct {
 // GetConvolutionParameterfv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetConvolutionParameterfvCookie.Reply()
 func GetConvolutionParameterfv(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname uint32) GetConvolutionParameterfvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetConvolutionParameterfv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getConvolutionParameterfvRequest(c, ContextTag, Target, Pname), cookie)
 	return GetConvolutionParameterfvCookie{cookie}
@@ -7955,6 +8462,9 @@ func GetConvolutionParameterfv(c *xgb.Conn, ContextTag ContextTag, Target uint32
 // GetConvolutionParameterfvUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetConvolutionParameterfvUnchecked(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname uint32) GetConvolutionParameterfvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetConvolutionParameterfv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getConvolutionParameterfvRequest(c, ContextTag, Target, Pname), cookie)
 	return GetConvolutionParameterfvCookie{cookie}
@@ -8053,6 +8563,9 @@ type GetConvolutionParameterivCookie struct {
 // GetConvolutionParameteriv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetConvolutionParameterivCookie.Reply()
 func GetConvolutionParameteriv(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname uint32) GetConvolutionParameterivCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetConvolutionParameteriv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getConvolutionParameterivRequest(c, ContextTag, Target, Pname), cookie)
 	return GetConvolutionParameterivCookie{cookie}
@@ -8061,6 +8574,9 @@ func GetConvolutionParameteriv(c *xgb.Conn, ContextTag ContextTag, Target uint32
 // GetConvolutionParameterivUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetConvolutionParameterivUnchecked(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname uint32) GetConvolutionParameterivCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetConvolutionParameteriv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getConvolutionParameterivRequest(c, ContextTag, Target, Pname), cookie)
 	return GetConvolutionParameterivCookie{cookie}
@@ -8159,6 +8675,9 @@ type GetSeparableFilterCookie struct {
 // GetSeparableFilter sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetSeparableFilterCookie.Reply()
 func GetSeparableFilter(c *xgb.Conn, ContextTag ContextTag, Target uint32, Format uint32, Type uint32, SwapBytes bool) GetSeparableFilterCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetSeparableFilter' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getSeparableFilterRequest(c, ContextTag, Target, Format, Type, SwapBytes), cookie)
 	return GetSeparableFilterCookie{cookie}
@@ -8167,6 +8686,9 @@ func GetSeparableFilter(c *xgb.Conn, ContextTag ContextTag, Target uint32, Forma
 // GetSeparableFilterUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetSeparableFilterUnchecked(c *xgb.Conn, ContextTag ContextTag, Target uint32, Format uint32, Type uint32, SwapBytes bool) GetSeparableFilterCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetSeparableFilter' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getSeparableFilterRequest(c, ContextTag, Target, Format, Type, SwapBytes), cookie)
 	return GetSeparableFilterCookie{cookie}
@@ -8272,6 +8794,9 @@ type GetHistogramCookie struct {
 // GetHistogram sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetHistogramCookie.Reply()
 func GetHistogram(c *xgb.Conn, ContextTag ContextTag, Target uint32, Format uint32, Type uint32, SwapBytes bool, Reset bool) GetHistogramCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetHistogram' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getHistogramRequest(c, ContextTag, Target, Format, Type, SwapBytes, Reset), cookie)
 	return GetHistogramCookie{cookie}
@@ -8280,6 +8805,9 @@ func GetHistogram(c *xgb.Conn, ContextTag ContextTag, Target uint32, Format uint
 // GetHistogramUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetHistogramUnchecked(c *xgb.Conn, ContextTag ContextTag, Target uint32, Format uint32, Type uint32, SwapBytes bool, Reset bool) GetHistogramCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetHistogram' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getHistogramRequest(c, ContextTag, Target, Format, Type, SwapBytes, Reset), cookie)
 	return GetHistogramCookie{cookie}
@@ -8388,6 +8916,9 @@ type GetHistogramParameterfvCookie struct {
 // GetHistogramParameterfv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetHistogramParameterfvCookie.Reply()
 func GetHistogramParameterfv(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname uint32) GetHistogramParameterfvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetHistogramParameterfv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getHistogramParameterfvRequest(c, ContextTag, Target, Pname), cookie)
 	return GetHistogramParameterfvCookie{cookie}
@@ -8396,6 +8927,9 @@ func GetHistogramParameterfv(c *xgb.Conn, ContextTag ContextTag, Target uint32,
 // GetHistogramParameterfvUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetHistogramParameterfvUnchecked(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname uint32) GetHistogramParameterfvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetHistogramParameterfv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getHistogramParameterfvRequest(c, ContextTag, Target, Pname), cookie)
 	return GetHistogramParameterfvCookie{cookie}
@@ -8494,6 +9028,9 @@ type GetHistogramParameterivCookie struct {
 // GetHistogramParameteriv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetHistogramParameterivCookie.Reply()
 func GetHistogramParameteriv(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname uint32) GetHistogramParameterivCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetHistogramParameteriv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getHistogramParameterivRequest(c, ContextTag, Target, Pname), cookie)
 	return GetHistogramParameterivCookie{cookie}
@@ -8502,6 +9039,9 @@ func GetHistogramParameteriv(c *xgb.Conn, ContextTag ContextTag, Target uint32,
 // GetHistogramParameterivUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetHistogramParameterivUnchecked(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname uint32) GetHistogramParameterivCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetHistogramParameteriv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getHistogramParameterivRequest(c, ContextTag, Target, Pname), cookie)
 	return GetHistogramParameterivCookie{cookie}
@@ -8600,6 +9140,9 @@ type GetMinmaxCookie struct {
 // GetMinmax sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetMinmaxCookie.Reply()
 func GetMinmax(c *xgb.Conn, ContextTag ContextTag, Target uint32, Format uint32, Type uint32, SwapBytes bool, Reset bool) GetMinmaxCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetMinmax' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getMinmaxRequest(c, ContextTag, Target, Format, Type, SwapBytes, Reset), cookie)
 	return GetMinmaxCookie{cookie}
@@ -8608,6 +9151,9 @@ func GetMinmax(c *xgb.Conn, ContextTag ContextTag, Target uint32, Format uint32,
 // GetMinmaxUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetMinmaxUnchecked(c *xgb.Conn, ContextTag ContextTag, Target uint32, Format uint32, Type uint32, SwapBytes bool, Reset bool) GetMinmaxCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetMinmax' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getMinmaxRequest(c, ContextTag, Target, Format, Type, SwapBytes, Reset), cookie)
 	return GetMinmaxCookie{cookie}
@@ -8709,6 +9255,9 @@ type GetMinmaxParameterfvCookie struct {
 // GetMinmaxParameterfv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetMinmaxParameterfvCookie.Reply()
 func GetMinmaxParameterfv(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname uint32) GetMinmaxParameterfvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetMinmaxParameterfv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getMinmaxParameterfvRequest(c, ContextTag, Target, Pname), cookie)
 	return GetMinmaxParameterfvCookie{cookie}
@@ -8717,6 +9266,9 @@ func GetMinmaxParameterfv(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pna
 // GetMinmaxParameterfvUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetMinmaxParameterfvUnchecked(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname uint32) GetMinmaxParameterfvCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetMinmaxParameterfv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getMinmaxParameterfvRequest(c, ContextTag, Target, Pname), cookie)
 	return GetMinmaxParameterfvCookie{cookie}
@@ -8815,6 +9367,9 @@ type GetMinmaxParameterivCookie struct {
 // GetMinmaxParameteriv sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetMinmaxParameterivCookie.Reply()
 func GetMinmaxParameteriv(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname uint32) GetMinmaxParameterivCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetMinmaxParameteriv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getMinmaxParameterivRequest(c, ContextTag, Target, Pname), cookie)
 	return GetMinmaxParameterivCookie{cookie}
@@ -8823,6 +9378,9 @@ func GetMinmaxParameteriv(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pna
 // GetMinmaxParameterivUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetMinmaxParameterivUnchecked(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname uint32) GetMinmaxParameterivCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetMinmaxParameteriv' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getMinmaxParameterivRequest(c, ContextTag, Target, Pname), cookie)
 	return GetMinmaxParameterivCookie{cookie}
@@ -8921,6 +9479,9 @@ type GetCompressedTexImageARBCookie struct {
 // GetCompressedTexImageARB sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetCompressedTexImageARBCookie.Reply()
 func GetCompressedTexImageARB(c *xgb.Conn, ContextTag ContextTag, Target uint32, Level int32) GetCompressedTexImageARBCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetCompressedTexImageARB' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getCompressedTexImageARBRequest(c, ContextTag, Target, Level), cookie)
 	return GetCompressedTexImageARBCookie{cookie}
@@ -8929,6 +9490,9 @@ func GetCompressedTexImageARB(c *xgb.Conn, ContextTag ContextTag, Target uint32,
 // GetCompressedTexImageARBUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetCompressedTexImageARBUnchecked(c *xgb.Conn, ContextTag ContextTag, Target uint32, Level int32) GetCompressedTexImageARBCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetCompressedTexImageARB' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getCompressedTexImageARBRequest(c, ContextTag, Target, Level), cookie)
 	return GetCompressedTexImageARBCookie{cookie}
@@ -9020,6 +9584,9 @@ type DeleteQueriesARBCookie struct {
 // DeleteQueriesARB sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func DeleteQueriesARB(c *xgb.Conn, ContextTag ContextTag, N int32, Ids []uint32) DeleteQueriesARBCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'DeleteQueriesARB' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(deleteQueriesARBRequest(c, ContextTag, N, Ids), cookie)
 	return DeleteQueriesARBCookie{cookie}
@@ -9028,6 +9595,9 @@ func DeleteQueriesARB(c *xgb.Conn, ContextTag ContextTag, N int32, Ids []uint32)
 // DeleteQueriesARBChecked sends a checked request.
 // If an error occurs, it can be retrieved using DeleteQueriesARBCookie.Check()
 func DeleteQueriesARBChecked(c *xgb.Conn, ContextTag ContextTag, N int32, Ids []uint32) DeleteQueriesARBCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'DeleteQueriesARB' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(deleteQueriesARBRequest(c, ContextTag, N, Ids), cookie)
 	return DeleteQueriesARBCookie{cookie}
@@ -9078,6 +9648,9 @@ type GenQueriesARBCookie struct {
 // GenQueriesARB sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GenQueriesARBCookie.Reply()
 func GenQueriesARB(c *xgb.Conn, ContextTag ContextTag, N int32) GenQueriesARBCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GenQueriesARB' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(genQueriesARBRequest(c, ContextTag, N), cookie)
 	return GenQueriesARBCookie{cookie}
@@ -9086,6 +9659,9 @@ func GenQueriesARB(c *xgb.Conn, ContextTag ContextTag, N int32) GenQueriesARBCoo
 // GenQueriesARBUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GenQueriesARBUnchecked(c *xgb.Conn, ContextTag ContextTag, N int32) GenQueriesARBCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GenQueriesARB' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(genQueriesARBRequest(c, ContextTag, N), cookie)
 	return GenQueriesARBCookie{cookie}
@@ -9170,6 +9746,9 @@ type IsQueryARBCookie struct {
 // IsQueryARB sends a checked request.
 // If an error occurs, it will be returned with the reply by calling IsQueryARBCookie.Reply()
 func IsQueryARB(c *xgb.Conn, ContextTag ContextTag, Id uint32) IsQueryARBCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'IsQueryARB' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(isQueryARBRequest(c, ContextTag, Id), cookie)
 	return IsQueryARBCookie{cookie}
@@ -9178,6 +9757,9 @@ func IsQueryARB(c *xgb.Conn, ContextTag ContextTag, Id uint32) IsQueryARBCookie
 // IsQueryARBUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func IsQueryARBUnchecked(c *xgb.Conn, ContextTag ContextTag, Id uint32) IsQueryARBCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'IsQueryARB' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(isQueryARBRequest(c, ContextTag, Id), cookie)
 	return IsQueryARBCookie{cookie}
@@ -9255,6 +9837,9 @@ type GetQueryivARBCookie struct {
 // GetQueryivARB sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetQueryivARBCookie.Reply()
 func GetQueryivARB(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname uint32) GetQueryivARBCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetQueryivARB' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getQueryivARBRequest(c, ContextTag, Target, Pname), cookie)
 	return GetQueryivARBCookie{cookie}
@@ -9263,6 +9848,9 @@ func GetQueryivARB(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname uint
 // GetQueryivARBUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetQueryivARBUnchecked(c *xgb.Conn, ContextTag ContextTag, Target uint32, Pname uint32) GetQueryivARBCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetQueryivARB' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getQueryivARBRequest(c, ContextTag, Target, Pname), cookie)
 	return GetQueryivARBCookie{cookie}
@@ -9361,6 +9949,9 @@ type GetQueryObjectivARBCookie struct {
 // GetQueryObjectivARB sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetQueryObjectivARBCookie.Reply()
 func GetQueryObjectivARB(c *xgb.Conn, ContextTag ContextTag, Id uint32, Pname uint32) GetQueryObjectivARBCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetQueryObjectivARB' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getQueryObjectivARBRequest(c, ContextTag, Id, Pname), cookie)
 	return GetQueryObjectivARBCookie{cookie}
@@ -9369,6 +9960,9 @@ func GetQueryObjectivARB(c *xgb.Conn, ContextTag ContextTag, Id uint32, Pname ui
 // GetQueryObjectivARBUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetQueryObjectivARBUnchecked(c *xgb.Conn, ContextTag ContextTag, Id uint32, Pname uint32) GetQueryObjectivARBCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetQueryObjectivARB' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getQueryObjectivARBRequest(c, ContextTag, Id, Pname), cookie)
 	return GetQueryObjectivARBCookie{cookie}
@@ -9467,6 +10061,9 @@ type GetQueryObjectuivARBCookie struct {
 // GetQueryObjectuivARB sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetQueryObjectuivARBCookie.Reply()
 func GetQueryObjectuivARB(c *xgb.Conn, ContextTag ContextTag, Id uint32, Pname uint32) GetQueryObjectuivARBCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetQueryObjectuivARB' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getQueryObjectuivARBRequest(c, ContextTag, Id, Pname), cookie)
 	return GetQueryObjectuivARBCookie{cookie}
@@ -9475,6 +10072,9 @@ func GetQueryObjectuivARB(c *xgb.Conn, ContextTag ContextTag, Id uint32, Pname u
 // GetQueryObjectuivARBUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetQueryObjectuivARBUnchecked(c *xgb.Conn, ContextTag ContextTag, Id uint32, Pname uint32) GetQueryObjectuivARBCookie {
+	if _, ok := c.Extensions["GLX"]; !ok {
+		panic("Cannot issue request 'GetQueryObjectuivARB' using the uninitialized extension 'GLX'. glx.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getQueryObjectuivARBRequest(c, ContextTag, Id, Pname), cookie)
 	return GetQueryObjectuivARBCookie{cookie}
diff --git a/nexgb/randr/randr.go b/nexgb/randr/randr.go
index 83e7035..9a6e89f 100644
--- a/nexgb/randr/randr.go
+++ b/nexgb/randr/randr.go
@@ -2,7 +2,7 @@
 package randr
 
 /*
-	This file was generated by randr.xml on May 11 2012 1:58:36am EDT.
+	This file was generated by randr.xml on May 11 2012 11:57:19pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -1221,6 +1221,9 @@ type QueryVersionCookie struct {
 // QueryVersion sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryVersionCookie.Reply()
 func QueryVersion(c *xgb.Conn, MajorVersion uint32, MinorVersion uint32) QueryVersionCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryVersionRequest(c, MajorVersion, MinorVersion), cookie)
 	return QueryVersionCookie{cookie}
@@ -1229,6 +1232,9 @@ func QueryVersion(c *xgb.Conn, MajorVersion uint32, MinorVersion uint32) QueryVe
 // QueryVersionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryVersionUnchecked(c *xgb.Conn, MajorVersion uint32, MinorVersion uint32) QueryVersionCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryVersionRequest(c, MajorVersion, MinorVersion), cookie)
 	return QueryVersionCookie{cookie}
@@ -1313,6 +1319,9 @@ type SetScreenConfigCookie struct {
 // SetScreenConfig sends a checked request.
 // If an error occurs, it will be returned with the reply by calling SetScreenConfigCookie.Reply()
 func SetScreenConfig(c *xgb.Conn, Window xproto.Window, Timestamp xproto.Timestamp, ConfigTimestamp xproto.Timestamp, SizeID uint16, Rotation uint16, Rate uint16) SetScreenConfigCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'SetScreenConfig' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(setScreenConfigRequest(c, Window, Timestamp, ConfigTimestamp, SizeID, Rotation, Rate), cookie)
 	return SetScreenConfigCookie{cookie}
@@ -1321,6 +1330,9 @@ func SetScreenConfig(c *xgb.Conn, Window xproto.Window, Timestamp xproto.Timesta
 // SetScreenConfigUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetScreenConfigUnchecked(c *xgb.Conn, Window xproto.Window, Timestamp xproto.Timestamp, ConfigTimestamp xproto.Timestamp, SizeID uint16, Rotation uint16, Rate uint16) SetScreenConfigCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'SetScreenConfig' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(setScreenConfigRequest(c, Window, Timestamp, ConfigTimestamp, SizeID, Rotation, Rate), cookie)
 	return SetScreenConfigCookie{cookie}
@@ -1428,6 +1440,9 @@ type SelectInputCookie struct {
 // SelectInput sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SelectInput(c *xgb.Conn, Window xproto.Window, Enable uint16) SelectInputCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'SelectInput' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(selectInputRequest(c, Window, Enable), cookie)
 	return SelectInputCookie{cookie}
@@ -1436,6 +1451,9 @@ func SelectInput(c *xgb.Conn, Window xproto.Window, Enable uint16) SelectInputCo
 // SelectInputChecked sends a checked request.
 // If an error occurs, it can be retrieved using SelectInputCookie.Check()
 func SelectInputChecked(c *xgb.Conn, Window xproto.Window, Enable uint16) SelectInputCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'SelectInput' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(selectInputRequest(c, Window, Enable), cookie)
 	return SelectInputCookie{cookie}
@@ -1482,6 +1500,9 @@ type GetScreenInfoCookie struct {
 // GetScreenInfo sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetScreenInfoCookie.Reply()
 func GetScreenInfo(c *xgb.Conn, Window xproto.Window) GetScreenInfoCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'GetScreenInfo' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getScreenInfoRequest(c, Window), cookie)
 	return GetScreenInfoCookie{cookie}
@@ -1490,6 +1511,9 @@ func GetScreenInfo(c *xgb.Conn, Window xproto.Window) GetScreenInfoCookie {
 // GetScreenInfoUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetScreenInfoUnchecked(c *xgb.Conn, Window xproto.Window) GetScreenInfoCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'GetScreenInfo' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getScreenInfoRequest(c, Window), cookie)
 	return GetScreenInfoCookie{cookie}
@@ -1604,6 +1628,9 @@ type GetScreenSizeRangeCookie struct {
 // GetScreenSizeRange sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetScreenSizeRangeCookie.Reply()
 func GetScreenSizeRange(c *xgb.Conn, Window xproto.Window) GetScreenSizeRangeCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'GetScreenSizeRange' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getScreenSizeRangeRequest(c, Window), cookie)
 	return GetScreenSizeRangeCookie{cookie}
@@ -1612,6 +1639,9 @@ func GetScreenSizeRange(c *xgb.Conn, Window xproto.Window) GetScreenSizeRangeCoo
 // GetScreenSizeRangeUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetScreenSizeRangeUnchecked(c *xgb.Conn, Window xproto.Window) GetScreenSizeRangeCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'GetScreenSizeRange' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getScreenSizeRangeRequest(c, Window), cookie)
 	return GetScreenSizeRangeCookie{cookie}
@@ -1701,6 +1731,9 @@ type SetScreenSizeCookie struct {
 // SetScreenSize sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetScreenSize(c *xgb.Conn, Window xproto.Window, Width uint16, Height uint16, MmWidth uint32, MmHeight uint32) SetScreenSizeCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'SetScreenSize' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setScreenSizeRequest(c, Window, Width, Height, MmWidth, MmHeight), cookie)
 	return SetScreenSizeCookie{cookie}
@@ -1709,6 +1742,9 @@ func SetScreenSize(c *xgb.Conn, Window xproto.Window, Width uint16, Height uint1
 // SetScreenSizeChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetScreenSizeCookie.Check()
 func SetScreenSizeChecked(c *xgb.Conn, Window xproto.Window, Width uint16, Height uint16, MmWidth uint32, MmHeight uint32) SetScreenSizeCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'SetScreenSize' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setScreenSizeRequest(c, Window, Width, Height, MmWidth, MmHeight), cookie)
 	return SetScreenSizeCookie{cookie}
@@ -1762,6 +1798,9 @@ type GetScreenResourcesCookie struct {
 // GetScreenResources sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetScreenResourcesCookie.Reply()
 func GetScreenResources(c *xgb.Conn, Window xproto.Window) GetScreenResourcesCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'GetScreenResources' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getScreenResourcesRequest(c, Window), cookie)
 	return GetScreenResourcesCookie{cookie}
@@ -1770,6 +1809,9 @@ func GetScreenResources(c *xgb.Conn, Window xproto.Window) GetScreenResourcesCoo
 // GetScreenResourcesUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetScreenResourcesUnchecked(c *xgb.Conn, Window xproto.Window) GetScreenResourcesCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'GetScreenResources' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getScreenResourcesRequest(c, Window), cookie)
 	return GetScreenResourcesCookie{cookie}
@@ -1892,6 +1934,9 @@ type GetOutputInfoCookie struct {
 // GetOutputInfo sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetOutputInfoCookie.Reply()
 func GetOutputInfo(c *xgb.Conn, Output Output, ConfigTimestamp xproto.Timestamp) GetOutputInfoCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'GetOutputInfo' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getOutputInfoRequest(c, Output, ConfigTimestamp), cookie)
 	return GetOutputInfoCookie{cookie}
@@ -1900,6 +1945,9 @@ func GetOutputInfo(c *xgb.Conn, Output Output, ConfigTimestamp xproto.Timestamp)
 // GetOutputInfoUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetOutputInfoUnchecked(c *xgb.Conn, Output Output, ConfigTimestamp xproto.Timestamp) GetOutputInfoCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'GetOutputInfo' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getOutputInfoRequest(c, Output, ConfigTimestamp), cookie)
 	return GetOutputInfoCookie{cookie}
@@ -2047,6 +2095,9 @@ type ListOutputPropertiesCookie struct {
 // ListOutputProperties sends a checked request.
 // If an error occurs, it will be returned with the reply by calling ListOutputPropertiesCookie.Reply()
 func ListOutputProperties(c *xgb.Conn, Output Output) ListOutputPropertiesCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'ListOutputProperties' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(listOutputPropertiesRequest(c, Output), cookie)
 	return ListOutputPropertiesCookie{cookie}
@@ -2055,6 +2106,9 @@ func ListOutputProperties(c *xgb.Conn, Output Output) ListOutputPropertiesCookie
 // ListOutputPropertiesUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ListOutputPropertiesUnchecked(c *xgb.Conn, Output Output) ListOutputPropertiesCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'ListOutputProperties' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(listOutputPropertiesRequest(c, Output), cookie)
 	return ListOutputPropertiesCookie{cookie}
@@ -2140,6 +2194,9 @@ type QueryOutputPropertyCookie struct {
 // QueryOutputProperty sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryOutputPropertyCookie.Reply()
 func QueryOutputProperty(c *xgb.Conn, Output Output, Property xproto.Atom) QueryOutputPropertyCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'QueryOutputProperty' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryOutputPropertyRequest(c, Output, Property), cookie)
 	return QueryOutputPropertyCookie{cookie}
@@ -2148,6 +2205,9 @@ func QueryOutputProperty(c *xgb.Conn, Output Output, Property xproto.Atom) Query
 // QueryOutputPropertyUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryOutputPropertyUnchecked(c *xgb.Conn, Output Output, Property xproto.Atom) QueryOutputPropertyCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'QueryOutputProperty' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryOutputPropertyRequest(c, Output, Property), cookie)
 	return QueryOutputPropertyCookie{cookie}
@@ -2256,6 +2316,9 @@ type ConfigureOutputPropertyCookie struct {
 // ConfigureOutputProperty sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ConfigureOutputProperty(c *xgb.Conn, Output Output, Property xproto.Atom, Pending bool, Range bool, Values []int32) ConfigureOutputPropertyCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'ConfigureOutputProperty' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(configureOutputPropertyRequest(c, Output, Property, Pending, Range, Values), cookie)
 	return ConfigureOutputPropertyCookie{cookie}
@@ -2264,6 +2327,9 @@ func ConfigureOutputProperty(c *xgb.Conn, Output Output, Property xproto.Atom, P
 // ConfigureOutputPropertyChecked sends a checked request.
 // If an error occurs, it can be retrieved using ConfigureOutputPropertyCookie.Check()
 func ConfigureOutputPropertyChecked(c *xgb.Conn, Output Output, Property xproto.Atom, Pending bool, Range bool, Values []int32) ConfigureOutputPropertyCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'ConfigureOutputProperty' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(configureOutputPropertyRequest(c, Output, Property, Pending, Range, Values), cookie)
 	return ConfigureOutputPropertyCookie{cookie}
@@ -2330,6 +2396,9 @@ type ChangeOutputPropertyCookie struct {
 // ChangeOutputProperty sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ChangeOutputProperty(c *xgb.Conn, Output Output, Property xproto.Atom, Type xproto.Atom, Format byte, Mode byte, NumUnits uint32, Data []byte) ChangeOutputPropertyCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'ChangeOutputProperty' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(changeOutputPropertyRequest(c, Output, Property, Type, Format, Mode, NumUnits, Data), cookie)
 	return ChangeOutputPropertyCookie{cookie}
@@ -2338,6 +2407,9 @@ func ChangeOutputProperty(c *xgb.Conn, Output Output, Property xproto.Atom, Type
 // ChangeOutputPropertyChecked sends a checked request.
 // If an error occurs, it can be retrieved using ChangeOutputPropertyCookie.Check()
 func ChangeOutputPropertyChecked(c *xgb.Conn, Output Output, Property xproto.Atom, Type xproto.Atom, Format byte, Mode byte, NumUnits uint32, Data []byte) ChangeOutputPropertyCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'ChangeOutputProperty' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(changeOutputPropertyRequest(c, Output, Property, Type, Format, Mode, NumUnits, Data), cookie)
 	return ChangeOutputPropertyCookie{cookie}
@@ -2399,6 +2471,9 @@ type DeleteOutputPropertyCookie struct {
 // DeleteOutputProperty sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func DeleteOutputProperty(c *xgb.Conn, Output Output, Property xproto.Atom) DeleteOutputPropertyCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'DeleteOutputProperty' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(deleteOutputPropertyRequest(c, Output, Property), cookie)
 	return DeleteOutputPropertyCookie{cookie}
@@ -2407,6 +2482,9 @@ func DeleteOutputProperty(c *xgb.Conn, Output Output, Property xproto.Atom) Dele
 // DeleteOutputPropertyChecked sends a checked request.
 // If an error occurs, it can be retrieved using DeleteOutputPropertyCookie.Check()
 func DeleteOutputPropertyChecked(c *xgb.Conn, Output Output, Property xproto.Atom) DeleteOutputPropertyCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'DeleteOutputProperty' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(deleteOutputPropertyRequest(c, Output, Property), cookie)
 	return DeleteOutputPropertyCookie{cookie}
@@ -2451,6 +2529,9 @@ type GetOutputPropertyCookie struct {
 // GetOutputProperty sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetOutputPropertyCookie.Reply()
 func GetOutputProperty(c *xgb.Conn, Output Output, Property xproto.Atom, Type xproto.Atom, LongOffset uint32, LongLength uint32, Delete bool, Pending bool) GetOutputPropertyCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'GetOutputProperty' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getOutputPropertyRequest(c, Output, Property, Type, LongOffset, LongLength, Delete, Pending), cookie)
 	return GetOutputPropertyCookie{cookie}
@@ -2459,6 +2540,9 @@ func GetOutputProperty(c *xgb.Conn, Output Output, Property xproto.Atom, Type xp
 // GetOutputPropertyUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetOutputPropertyUnchecked(c *xgb.Conn, Output Output, Property xproto.Atom, Type xproto.Atom, LongOffset uint32, LongLength uint32, Delete bool, Pending bool) GetOutputPropertyCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'GetOutputProperty' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getOutputPropertyRequest(c, Output, Property, Type, LongOffset, LongLength, Delete, Pending), cookie)
 	return GetOutputPropertyCookie{cookie}
@@ -2578,6 +2662,9 @@ type CreateModeCookie struct {
 // CreateMode sends a checked request.
 // If an error occurs, it will be returned with the reply by calling CreateModeCookie.Reply()
 func CreateMode(c *xgb.Conn, Window xproto.Window, ModeInfo ModeInfo, Name string) CreateModeCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'CreateMode' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(createModeRequest(c, Window, ModeInfo, Name), cookie)
 	return CreateModeCookie{cookie}
@@ -2586,6 +2673,9 @@ func CreateMode(c *xgb.Conn, Window xproto.Window, ModeInfo ModeInfo, Name strin
 // CreateModeUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateModeUnchecked(c *xgb.Conn, Window xproto.Window, ModeInfo ModeInfo, Name string) CreateModeCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'CreateMode' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(createModeRequest(c, Window, ModeInfo, Name), cookie)
 	return CreateModeCookie{cookie}
@@ -2672,6 +2762,9 @@ type DestroyModeCookie struct {
 // DestroyMode sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func DestroyMode(c *xgb.Conn, Mode Mode) DestroyModeCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'DestroyMode' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(destroyModeRequest(c, Mode), cookie)
 	return DestroyModeCookie{cookie}
@@ -2680,6 +2773,9 @@ func DestroyMode(c *xgb.Conn, Mode Mode) DestroyModeCookie {
 // DestroyModeChecked sends a checked request.
 // If an error occurs, it can be retrieved using DestroyModeCookie.Check()
 func DestroyModeChecked(c *xgb.Conn, Mode Mode) DestroyModeCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'DestroyMode' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(destroyModeRequest(c, Mode), cookie)
 	return DestroyModeCookie{cookie}
@@ -2721,6 +2817,9 @@ type AddOutputModeCookie struct {
 // AddOutputMode sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func AddOutputMode(c *xgb.Conn, Output Output, Mode Mode) AddOutputModeCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'AddOutputMode' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(addOutputModeRequest(c, Output, Mode), cookie)
 	return AddOutputModeCookie{cookie}
@@ -2729,6 +2828,9 @@ func AddOutputMode(c *xgb.Conn, Output Output, Mode Mode) AddOutputModeCookie {
 // AddOutputModeChecked sends a checked request.
 // If an error occurs, it can be retrieved using AddOutputModeCookie.Check()
 func AddOutputModeChecked(c *xgb.Conn, Output Output, Mode Mode) AddOutputModeCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'AddOutputMode' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(addOutputModeRequest(c, Output, Mode), cookie)
 	return AddOutputModeCookie{cookie}
@@ -2773,6 +2875,9 @@ type DeleteOutputModeCookie struct {
 // DeleteOutputMode sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func DeleteOutputMode(c *xgb.Conn, Output Output, Mode Mode) DeleteOutputModeCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'DeleteOutputMode' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(deleteOutputModeRequest(c, Output, Mode), cookie)
 	return DeleteOutputModeCookie{cookie}
@@ -2781,6 +2886,9 @@ func DeleteOutputMode(c *xgb.Conn, Output Output, Mode Mode) DeleteOutputModeCoo
 // DeleteOutputModeChecked sends a checked request.
 // If an error occurs, it can be retrieved using DeleteOutputModeCookie.Check()
 func DeleteOutputModeChecked(c *xgb.Conn, Output Output, Mode Mode) DeleteOutputModeCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'DeleteOutputMode' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(deleteOutputModeRequest(c, Output, Mode), cookie)
 	return DeleteOutputModeCookie{cookie}
@@ -2825,6 +2933,9 @@ type GetCrtcInfoCookie struct {
 // GetCrtcInfo sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetCrtcInfoCookie.Reply()
 func GetCrtcInfo(c *xgb.Conn, Crtc Crtc, ConfigTimestamp xproto.Timestamp) GetCrtcInfoCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'GetCrtcInfo' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getCrtcInfoRequest(c, Crtc, ConfigTimestamp), cookie)
 	return GetCrtcInfoCookie{cookie}
@@ -2833,6 +2944,9 @@ func GetCrtcInfo(c *xgb.Conn, Crtc Crtc, ConfigTimestamp xproto.Timestamp) GetCr
 // GetCrtcInfoUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetCrtcInfoUnchecked(c *xgb.Conn, Crtc Crtc, ConfigTimestamp xproto.Timestamp) GetCrtcInfoCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'GetCrtcInfo' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getCrtcInfoRequest(c, Crtc, ConfigTimestamp), cookie)
 	return GetCrtcInfoCookie{cookie}
@@ -2963,6 +3077,9 @@ type SetCrtcConfigCookie struct {
 // SetCrtcConfig sends a checked request.
 // If an error occurs, it will be returned with the reply by calling SetCrtcConfigCookie.Reply()
 func SetCrtcConfig(c *xgb.Conn, Crtc Crtc, Timestamp xproto.Timestamp, ConfigTimestamp xproto.Timestamp, X int16, Y int16, Mode Mode, Rotation uint16, Outputs []Output) SetCrtcConfigCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'SetCrtcConfig' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(setCrtcConfigRequest(c, Crtc, Timestamp, ConfigTimestamp, X, Y, Mode, Rotation, Outputs), cookie)
 	return SetCrtcConfigCookie{cookie}
@@ -2971,6 +3088,9 @@ func SetCrtcConfig(c *xgb.Conn, Crtc Crtc, Timestamp xproto.Timestamp, ConfigTim
 // SetCrtcConfigUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetCrtcConfigUnchecked(c *xgb.Conn, Crtc Crtc, Timestamp xproto.Timestamp, ConfigTimestamp xproto.Timestamp, X int16, Y int16, Mode Mode, Rotation uint16, Outputs []Output) SetCrtcConfigCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'SetCrtcConfig' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(setCrtcConfigRequest(c, Crtc, Timestamp, ConfigTimestamp, X, Y, Mode, Rotation, Outputs), cookie)
 	return SetCrtcConfigCookie{cookie}
@@ -3075,6 +3195,9 @@ type GetCrtcGammaSizeCookie struct {
 // GetCrtcGammaSize sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetCrtcGammaSizeCookie.Reply()
 func GetCrtcGammaSize(c *xgb.Conn, Crtc Crtc) GetCrtcGammaSizeCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'GetCrtcGammaSize' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getCrtcGammaSizeRequest(c, Crtc), cookie)
 	return GetCrtcGammaSizeCookie{cookie}
@@ -3083,6 +3206,9 @@ func GetCrtcGammaSize(c *xgb.Conn, Crtc Crtc) GetCrtcGammaSizeCookie {
 // GetCrtcGammaSizeUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetCrtcGammaSizeUnchecked(c *xgb.Conn, Crtc Crtc) GetCrtcGammaSizeCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'GetCrtcGammaSize' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getCrtcGammaSizeRequest(c, Crtc), cookie)
 	return GetCrtcGammaSizeCookie{cookie}
@@ -3160,6 +3286,9 @@ type GetCrtcGammaCookie struct {
 // GetCrtcGamma sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetCrtcGammaCookie.Reply()
 func GetCrtcGamma(c *xgb.Conn, Crtc Crtc) GetCrtcGammaCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'GetCrtcGamma' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getCrtcGammaRequest(c, Crtc), cookie)
 	return GetCrtcGammaCookie{cookie}
@@ -3168,6 +3297,9 @@ func GetCrtcGamma(c *xgb.Conn, Crtc Crtc) GetCrtcGammaCookie {
 // GetCrtcGammaUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetCrtcGammaUnchecked(c *xgb.Conn, Crtc Crtc) GetCrtcGammaCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'GetCrtcGamma' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getCrtcGammaRequest(c, Crtc), cookie)
 	return GetCrtcGammaCookie{cookie}
@@ -3269,6 +3401,9 @@ type SetCrtcGammaCookie struct {
 // SetCrtcGamma sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetCrtcGamma(c *xgb.Conn, Crtc Crtc, Size uint16, Red []uint16, Green []uint16, Blue []uint16) SetCrtcGammaCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'SetCrtcGamma' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setCrtcGammaRequest(c, Crtc, Size, Red, Green, Blue), cookie)
 	return SetCrtcGammaCookie{cookie}
@@ -3277,6 +3412,9 @@ func SetCrtcGamma(c *xgb.Conn, Crtc Crtc, Size uint16, Red []uint16, Green []uin
 // SetCrtcGammaChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetCrtcGammaCookie.Check()
 func SetCrtcGammaChecked(c *xgb.Conn, Crtc Crtc, Size uint16, Red []uint16, Green []uint16, Blue []uint16) SetCrtcGammaCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'SetCrtcGamma' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setCrtcGammaRequest(c, Crtc, Size, Red, Green, Blue), cookie)
 	return SetCrtcGammaCookie{cookie}
@@ -3341,6 +3479,9 @@ type GetScreenResourcesCurrentCookie struct {
 // GetScreenResourcesCurrent sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetScreenResourcesCurrentCookie.Reply()
 func GetScreenResourcesCurrent(c *xgb.Conn, Window xproto.Window) GetScreenResourcesCurrentCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'GetScreenResourcesCurrent' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getScreenResourcesCurrentRequest(c, Window), cookie)
 	return GetScreenResourcesCurrentCookie{cookie}
@@ -3349,6 +3490,9 @@ func GetScreenResourcesCurrent(c *xgb.Conn, Window xproto.Window) GetScreenResou
 // GetScreenResourcesCurrentUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetScreenResourcesCurrentUnchecked(c *xgb.Conn, Window xproto.Window) GetScreenResourcesCurrentCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'GetScreenResourcesCurrent' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getScreenResourcesCurrentRequest(c, Window), cookie)
 	return GetScreenResourcesCurrentCookie{cookie}
@@ -3471,6 +3615,9 @@ type SetCrtcTransformCookie struct {
 // SetCrtcTransform sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetCrtcTransform(c *xgb.Conn, Crtc Crtc, Transform render.Transform, FilterLen uint16, FilterName string, FilterParams []render.Fixed) SetCrtcTransformCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'SetCrtcTransform' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setCrtcTransformRequest(c, Crtc, Transform, FilterLen, FilterName, FilterParams), cookie)
 	return SetCrtcTransformCookie{cookie}
@@ -3479,6 +3626,9 @@ func SetCrtcTransform(c *xgb.Conn, Crtc Crtc, Transform render.Transform, Filter
 // SetCrtcTransformChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetCrtcTransformCookie.Check()
 func SetCrtcTransformChecked(c *xgb.Conn, Crtc Crtc, Transform render.Transform, FilterLen uint16, FilterName string, FilterParams []render.Fixed) SetCrtcTransformCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'SetCrtcTransform' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setCrtcTransformRequest(c, Crtc, Transform, FilterLen, FilterName, FilterParams), cookie)
 	return SetCrtcTransformCookie{cookie}
@@ -3540,6 +3690,9 @@ type GetCrtcTransformCookie struct {
 // GetCrtcTransform sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetCrtcTransformCookie.Reply()
 func GetCrtcTransform(c *xgb.Conn, Crtc Crtc) GetCrtcTransformCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'GetCrtcTransform' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getCrtcTransformRequest(c, Crtc), cookie)
 	return GetCrtcTransformCookie{cookie}
@@ -3548,6 +3701,9 @@ func GetCrtcTransform(c *xgb.Conn, Crtc Crtc) GetCrtcTransformCookie {
 // GetCrtcTransformUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetCrtcTransformUnchecked(c *xgb.Conn, Crtc Crtc) GetCrtcTransformCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'GetCrtcTransform' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getCrtcTransformRequest(c, Crtc), cookie)
 	return GetCrtcTransformCookie{cookie}
@@ -3688,6 +3844,9 @@ type GetPanningCookie struct {
 // GetPanning sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetPanningCookie.Reply()
 func GetPanning(c *xgb.Conn, Crtc Crtc) GetPanningCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'GetPanning' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getPanningRequest(c, Crtc), cookie)
 	return GetPanningCookie{cookie}
@@ -3696,6 +3855,9 @@ func GetPanning(c *xgb.Conn, Crtc Crtc) GetPanningCookie {
 // GetPanningUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetPanningUnchecked(c *xgb.Conn, Crtc Crtc) GetPanningCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'GetPanning' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getPanningRequest(c, Crtc), cookie)
 	return GetPanningCookie{cookie}
@@ -3819,6 +3981,9 @@ type SetPanningCookie struct {
 // SetPanning sends a checked request.
 // If an error occurs, it will be returned with the reply by calling SetPanningCookie.Reply()
 func SetPanning(c *xgb.Conn, Crtc Crtc, Timestamp xproto.Timestamp, Left uint16, Top uint16, Width uint16, Height uint16, TrackLeft uint16, TrackTop uint16, TrackWidth uint16, TrackHeight uint16, BorderLeft int16, BorderTop int16, BorderRight int16, BorderBottom int16) SetPanningCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'SetPanning' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(setPanningRequest(c, Crtc, Timestamp, Left, Top, Width, Height, TrackLeft, TrackTop, TrackWidth, TrackHeight, BorderLeft, BorderTop, BorderRight, BorderBottom), cookie)
 	return SetPanningCookie{cookie}
@@ -3827,6 +3992,9 @@ func SetPanning(c *xgb.Conn, Crtc Crtc, Timestamp xproto.Timestamp, Left uint16,
 // SetPanningUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetPanningUnchecked(c *xgb.Conn, Crtc Crtc, Timestamp xproto.Timestamp, Left uint16, Top uint16, Width uint16, Height uint16, TrackLeft uint16, TrackTop uint16, TrackWidth uint16, TrackHeight uint16, BorderLeft int16, BorderTop int16, BorderRight int16, BorderBottom int16) SetPanningCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'SetPanning' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(setPanningRequest(c, Crtc, Timestamp, Left, Top, Width, Height, TrackLeft, TrackTop, TrackWidth, TrackHeight, BorderLeft, BorderTop, BorderRight, BorderBottom), cookie)
 	return SetPanningCookie{cookie}
@@ -3941,6 +4109,9 @@ type SetOutputPrimaryCookie struct {
 // SetOutputPrimary sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetOutputPrimary(c *xgb.Conn, Window xproto.Window, Output Output) SetOutputPrimaryCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'SetOutputPrimary' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setOutputPrimaryRequest(c, Window, Output), cookie)
 	return SetOutputPrimaryCookie{cookie}
@@ -3949,6 +4120,9 @@ func SetOutputPrimary(c *xgb.Conn, Window xproto.Window, Output Output) SetOutpu
 // SetOutputPrimaryChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetOutputPrimaryCookie.Check()
 func SetOutputPrimaryChecked(c *xgb.Conn, Window xproto.Window, Output Output) SetOutputPrimaryCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'SetOutputPrimary' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setOutputPrimaryRequest(c, Window, Output), cookie)
 	return SetOutputPrimaryCookie{cookie}
@@ -3993,6 +4167,9 @@ type GetOutputPrimaryCookie struct {
 // GetOutputPrimary sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetOutputPrimaryCookie.Reply()
 func GetOutputPrimary(c *xgb.Conn, Window xproto.Window) GetOutputPrimaryCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'GetOutputPrimary' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getOutputPrimaryRequest(c, Window), cookie)
 	return GetOutputPrimaryCookie{cookie}
@@ -4001,6 +4178,9 @@ func GetOutputPrimary(c *xgb.Conn, Window xproto.Window) GetOutputPrimaryCookie
 // GetOutputPrimaryUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetOutputPrimaryUnchecked(c *xgb.Conn, Window xproto.Window) GetOutputPrimaryCookie {
+	if _, ok := c.Extensions["RANDR"]; !ok {
+		panic("Cannot issue request 'GetOutputPrimary' using the uninitialized extension 'RANDR'. randr.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getOutputPrimaryRequest(c, Window), cookie)
 	return GetOutputPrimaryCookie{cookie}
diff --git a/nexgb/record/record.go b/nexgb/record/record.go
index 5623e50..a9ae7ea 100644
--- a/nexgb/record/record.go
+++ b/nexgb/record/record.go
@@ -2,7 +2,7 @@
 package record
 
 /*
-	This file was generated by record.xml on May 11 2012 1:58:36am EDT.
+	This file was generated by record.xml on May 11 2012 11:57:19pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -526,6 +526,9 @@ type QueryVersionCookie struct {
 // QueryVersion sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryVersionCookie.Reply()
 func QueryVersion(c *xgb.Conn, MajorVersion uint16, MinorVersion uint16) QueryVersionCookie {
+	if _, ok := c.Extensions["RECORD"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'RECORD'. record.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryVersionRequest(c, MajorVersion, MinorVersion), cookie)
 	return QueryVersionCookie{cookie}
@@ -534,6 +537,9 @@ func QueryVersion(c *xgb.Conn, MajorVersion uint16, MinorVersion uint16) QueryVe
 // QueryVersionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryVersionUnchecked(c *xgb.Conn, MajorVersion uint16, MinorVersion uint16) QueryVersionCookie {
+	if _, ok := c.Extensions["RECORD"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'RECORD'. record.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryVersionRequest(c, MajorVersion, MinorVersion), cookie)
 	return QueryVersionCookie{cookie}
@@ -615,6 +621,9 @@ type CreateContextCookie struct {
 // CreateContext sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateContext(c *xgb.Conn, Context Context, ElementHeader ElementHeader, NumClientSpecs uint32, NumRanges uint32, ClientSpecs []ClientSpec, Ranges []Range) CreateContextCookie {
+	if _, ok := c.Extensions["RECORD"]; !ok {
+		panic("Cannot issue request 'CreateContext' using the uninitialized extension 'RECORD'. record.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createContextRequest(c, Context, ElementHeader, NumClientSpecs, NumRanges, ClientSpecs, Ranges), cookie)
 	return CreateContextCookie{cookie}
@@ -623,6 +632,9 @@ func CreateContext(c *xgb.Conn, Context Context, ElementHeader ElementHeader, Nu
 // CreateContextChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreateContextCookie.Check()
 func CreateContextChecked(c *xgb.Conn, Context Context, ElementHeader ElementHeader, NumClientSpecs uint32, NumRanges uint32, ClientSpecs []ClientSpec, Ranges []Range) CreateContextCookie {
+	if _, ok := c.Extensions["RECORD"]; !ok {
+		panic("Cannot issue request 'CreateContext' using the uninitialized extension 'RECORD'. record.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createContextRequest(c, Context, ElementHeader, NumClientSpecs, NumRanges, ClientSpecs, Ranges), cookie)
 	return CreateContextCookie{cookie}
@@ -683,6 +695,9 @@ type RegisterClientsCookie struct {
 // RegisterClients sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func RegisterClients(c *xgb.Conn, Context Context, ElementHeader ElementHeader, NumClientSpecs uint32, NumRanges uint32, ClientSpecs []ClientSpec, Ranges []Range) RegisterClientsCookie {
+	if _, ok := c.Extensions["RECORD"]; !ok {
+		panic("Cannot issue request 'RegisterClients' using the uninitialized extension 'RECORD'. record.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(registerClientsRequest(c, Context, ElementHeader, NumClientSpecs, NumRanges, ClientSpecs, Ranges), cookie)
 	return RegisterClientsCookie{cookie}
@@ -691,6 +706,9 @@ func RegisterClients(c *xgb.Conn, Context Context, ElementHeader ElementHeader,
 // RegisterClientsChecked sends a checked request.
 // If an error occurs, it can be retrieved using RegisterClientsCookie.Check()
 func RegisterClientsChecked(c *xgb.Conn, Context Context, ElementHeader ElementHeader, NumClientSpecs uint32, NumRanges uint32, ClientSpecs []ClientSpec, Ranges []Range) RegisterClientsCookie {
+	if _, ok := c.Extensions["RECORD"]; !ok {
+		panic("Cannot issue request 'RegisterClients' using the uninitialized extension 'RECORD'. record.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(registerClientsRequest(c, Context, ElementHeader, NumClientSpecs, NumRanges, ClientSpecs, Ranges), cookie)
 	return RegisterClientsCookie{cookie}
@@ -751,6 +769,9 @@ type UnregisterClientsCookie struct {
 // UnregisterClients sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func UnregisterClients(c *xgb.Conn, Context Context, NumClientSpecs uint32, ClientSpecs []ClientSpec) UnregisterClientsCookie {
+	if _, ok := c.Extensions["RECORD"]; !ok {
+		panic("Cannot issue request 'UnregisterClients' using the uninitialized extension 'RECORD'. record.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(unregisterClientsRequest(c, Context, NumClientSpecs, ClientSpecs), cookie)
 	return UnregisterClientsCookie{cookie}
@@ -759,6 +780,9 @@ func UnregisterClients(c *xgb.Conn, Context Context, NumClientSpecs uint32, Clie
 // UnregisterClientsChecked sends a checked request.
 // If an error occurs, it can be retrieved using UnregisterClientsCookie.Check()
 func UnregisterClientsChecked(c *xgb.Conn, Context Context, NumClientSpecs uint32, ClientSpecs []ClientSpec) UnregisterClientsCookie {
+	if _, ok := c.Extensions["RECORD"]; !ok {
+		panic("Cannot issue request 'UnregisterClients' using the uninitialized extension 'RECORD'. record.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(unregisterClientsRequest(c, Context, NumClientSpecs, ClientSpecs), cookie)
 	return UnregisterClientsCookie{cookie}
@@ -809,6 +833,9 @@ type GetContextCookie struct {
 // GetContext sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetContextCookie.Reply()
 func GetContext(c *xgb.Conn, Context Context) GetContextCookie {
+	if _, ok := c.Extensions["RECORD"]; !ok {
+		panic("Cannot issue request 'GetContext' using the uninitialized extension 'RECORD'. record.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getContextRequest(c, Context), cookie)
 	return GetContextCookie{cookie}
@@ -817,6 +844,9 @@ func GetContext(c *xgb.Conn, Context Context) GetContextCookie {
 // GetContextUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetContextUnchecked(c *xgb.Conn, Context Context) GetContextCookie {
+	if _, ok := c.Extensions["RECORD"]; !ok {
+		panic("Cannot issue request 'GetContext' using the uninitialized extension 'RECORD'. record.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getContextRequest(c, Context), cookie)
 	return GetContextCookie{cookie}
@@ -910,6 +940,9 @@ type EnableContextCookie struct {
 // EnableContext sends a checked request.
 // If an error occurs, it will be returned with the reply by calling EnableContextCookie.Reply()
 func EnableContext(c *xgb.Conn, Context Context) EnableContextCookie {
+	if _, ok := c.Extensions["RECORD"]; !ok {
+		panic("Cannot issue request 'EnableContext' using the uninitialized extension 'RECORD'. record.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(enableContextRequest(c, Context), cookie)
 	return EnableContextCookie{cookie}
@@ -918,6 +951,9 @@ func EnableContext(c *xgb.Conn, Context Context) EnableContextCookie {
 // EnableContextUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func EnableContextUnchecked(c *xgb.Conn, Context Context) EnableContextCookie {
+	if _, ok := c.Extensions["RECORD"]; !ok {
+		panic("Cannot issue request 'EnableContext' using the uninitialized extension 'RECORD'. record.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(enableContextRequest(c, Context), cookie)
 	return EnableContextCookie{cookie}
@@ -1024,6 +1060,9 @@ type DisableContextCookie struct {
 // DisableContext sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func DisableContext(c *xgb.Conn, Context Context) DisableContextCookie {
+	if _, ok := c.Extensions["RECORD"]; !ok {
+		panic("Cannot issue request 'DisableContext' using the uninitialized extension 'RECORD'. record.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(disableContextRequest(c, Context), cookie)
 	return DisableContextCookie{cookie}
@@ -1032,6 +1071,9 @@ func DisableContext(c *xgb.Conn, Context Context) DisableContextCookie {
 // DisableContextChecked sends a checked request.
 // If an error occurs, it can be retrieved using DisableContextCookie.Check()
 func DisableContextChecked(c *xgb.Conn, Context Context) DisableContextCookie {
+	if _, ok := c.Extensions["RECORD"]; !ok {
+		panic("Cannot issue request 'DisableContext' using the uninitialized extension 'RECORD'. record.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(disableContextRequest(c, Context), cookie)
 	return DisableContextCookie{cookie}
@@ -1073,6 +1115,9 @@ type FreeContextCookie struct {
 // FreeContext sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func FreeContext(c *xgb.Conn, Context Context) FreeContextCookie {
+	if _, ok := c.Extensions["RECORD"]; !ok {
+		panic("Cannot issue request 'FreeContext' using the uninitialized extension 'RECORD'. record.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(freeContextRequest(c, Context), cookie)
 	return FreeContextCookie{cookie}
@@ -1081,6 +1126,9 @@ func FreeContext(c *xgb.Conn, Context Context) FreeContextCookie {
 // FreeContextChecked sends a checked request.
 // If an error occurs, it can be retrieved using FreeContextCookie.Check()
 func FreeContextChecked(c *xgb.Conn, Context Context) FreeContextCookie {
+	if _, ok := c.Extensions["RECORD"]; !ok {
+		panic("Cannot issue request 'FreeContext' using the uninitialized extension 'RECORD'. record.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(freeContextRequest(c, Context), cookie)
 	return FreeContextCookie{cookie}
diff --git a/nexgb/render/render.go b/nexgb/render/render.go
index 65b0723..f7fa79f 100644
--- a/nexgb/render/render.go
+++ b/nexgb/render/render.go
@@ -2,7 +2,7 @@
 package render
 
 /*
-	This file was generated by render.xml on May 11 2012 1:58:36am EDT.
+	This file was generated by render.xml on May 11 2012 11:57:19pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -40,12 +40,6 @@ func init() {
 	xgb.NewExtErrorFuncs["RENDER"] = make(map[int]xgb.NewErrorFun)
 }
 
-// Skipping definition for base type 'Card32'
-
-// Skipping definition for base type 'Double'
-
-// Skipping definition for base type 'Bool'
-
 // Skipping definition for base type 'Float'
 
 // Skipping definition for base type 'Card8'
@@ -64,6 +58,12 @@ func init() {
 
 // Skipping definition for base type 'Char'
 
+// Skipping definition for base type 'Card32'
+
+// Skipping definition for base type 'Double'
+
+// Skipping definition for base type 'Bool'
+
 const (
 	PictTypeIndexed = 0
 	PictTypeDirect  = 1
@@ -1585,6 +1585,9 @@ type QueryVersionCookie struct {
 // QueryVersion sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryVersionCookie.Reply()
 func QueryVersion(c *xgb.Conn, ClientMajorVersion uint32, ClientMinorVersion uint32) QueryVersionCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryVersionRequest(c, ClientMajorVersion, ClientMinorVersion), cookie)
 	return QueryVersionCookie{cookie}
@@ -1593,6 +1596,9 @@ func QueryVersion(c *xgb.Conn, ClientMajorVersion uint32, ClientMinorVersion uin
 // QueryVersionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryVersionUnchecked(c *xgb.Conn, ClientMajorVersion uint32, ClientMinorVersion uint32) QueryVersionCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryVersionRequest(c, ClientMajorVersion, ClientMinorVersion), cookie)
 	return QueryVersionCookie{cookie}
@@ -1677,6 +1683,9 @@ type QueryPictFormatsCookie struct {
 // QueryPictFormats sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryPictFormatsCookie.Reply()
 func QueryPictFormats(c *xgb.Conn) QueryPictFormatsCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'QueryPictFormats' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryPictFormatsRequest(c), cookie)
 	return QueryPictFormatsCookie{cookie}
@@ -1685,6 +1694,9 @@ func QueryPictFormats(c *xgb.Conn) QueryPictFormatsCookie {
 // QueryPictFormatsUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryPictFormatsUnchecked(c *xgb.Conn) QueryPictFormatsCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'QueryPictFormats' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryPictFormatsRequest(c), cookie)
 	return QueryPictFormatsCookie{cookie}
@@ -1791,6 +1803,9 @@ type QueryPictIndexValuesCookie struct {
 // QueryPictIndexValues sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryPictIndexValuesCookie.Reply()
 func QueryPictIndexValues(c *xgb.Conn, Format Pictformat) QueryPictIndexValuesCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'QueryPictIndexValues' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryPictIndexValuesRequest(c, Format), cookie)
 	return QueryPictIndexValuesCookie{cookie}
@@ -1799,6 +1814,9 @@ func QueryPictIndexValues(c *xgb.Conn, Format Pictformat) QueryPictIndexValuesCo
 // QueryPictIndexValuesUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryPictIndexValuesUnchecked(c *xgb.Conn, Format Pictformat) QueryPictIndexValuesCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'QueryPictIndexValues' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryPictIndexValuesRequest(c, Format), cookie)
 	return QueryPictIndexValuesCookie{cookie}
@@ -1880,6 +1898,9 @@ type CreatePictureCookie struct {
 // CreatePicture sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreatePicture(c *xgb.Conn, Pid Picture, Drawable xproto.Drawable, Format Pictformat, ValueMask uint32, ValueList []uint32) CreatePictureCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'CreatePicture' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createPictureRequest(c, Pid, Drawable, Format, ValueMask, ValueList), cookie)
 	return CreatePictureCookie{cookie}
@@ -1888,6 +1909,9 @@ func CreatePicture(c *xgb.Conn, Pid Picture, Drawable xproto.Drawable, Format Pi
 // CreatePictureChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreatePictureCookie.Check()
 func CreatePictureChecked(c *xgb.Conn, Pid Picture, Drawable xproto.Drawable, Format Pictformat, ValueMask uint32, ValueList []uint32) CreatePictureCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'CreatePicture' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createPictureRequest(c, Pid, Drawable, Format, ValueMask, ValueList), cookie)
 	return CreatePictureCookie{cookie}
@@ -1943,6 +1967,9 @@ type ChangePictureCookie struct {
 // ChangePicture sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ChangePicture(c *xgb.Conn, Picture Picture, ValueMask uint32, ValueList []uint32) ChangePictureCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'ChangePicture' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(changePictureRequest(c, Picture, ValueMask, ValueList), cookie)
 	return ChangePictureCookie{cookie}
@@ -1951,6 +1978,9 @@ func ChangePicture(c *xgb.Conn, Picture Picture, ValueMask uint32, ValueList []u
 // ChangePictureChecked sends a checked request.
 // If an error occurs, it can be retrieved using ChangePictureCookie.Check()
 func ChangePictureChecked(c *xgb.Conn, Picture Picture, ValueMask uint32, ValueList []uint32) ChangePictureCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'ChangePicture' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(changePictureRequest(c, Picture, ValueMask, ValueList), cookie)
 	return ChangePictureCookie{cookie}
@@ -2000,6 +2030,9 @@ type SetPictureClipRectanglesCookie struct {
 // SetPictureClipRectangles sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetPictureClipRectangles(c *xgb.Conn, Picture Picture, ClipXOrigin int16, ClipYOrigin int16, Rectangles []xproto.Rectangle) SetPictureClipRectanglesCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'SetPictureClipRectangles' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setPictureClipRectanglesRequest(c, Picture, ClipXOrigin, ClipYOrigin, Rectangles), cookie)
 	return SetPictureClipRectanglesCookie{cookie}
@@ -2008,6 +2041,9 @@ func SetPictureClipRectangles(c *xgb.Conn, Picture Picture, ClipXOrigin int16, C
 // SetPictureClipRectanglesChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetPictureClipRectanglesCookie.Check()
 func SetPictureClipRectanglesChecked(c *xgb.Conn, Picture Picture, ClipXOrigin int16, ClipYOrigin int16, Rectangles []xproto.Rectangle) SetPictureClipRectanglesCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'SetPictureClipRectangles' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setPictureClipRectanglesRequest(c, Picture, ClipXOrigin, ClipYOrigin, Rectangles), cookie)
 	return SetPictureClipRectanglesCookie{cookie}
@@ -2057,6 +2093,9 @@ type FreePictureCookie struct {
 // FreePicture sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func FreePicture(c *xgb.Conn, Picture Picture) FreePictureCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'FreePicture' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(freePictureRequest(c, Picture), cookie)
 	return FreePictureCookie{cookie}
@@ -2065,6 +2104,9 @@ func FreePicture(c *xgb.Conn, Picture Picture) FreePictureCookie {
 // FreePictureChecked sends a checked request.
 // If an error occurs, it can be retrieved using FreePictureCookie.Check()
 func FreePictureChecked(c *xgb.Conn, Picture Picture) FreePictureCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'FreePicture' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(freePictureRequest(c, Picture), cookie)
 	return FreePictureCookie{cookie}
@@ -2106,6 +2148,9 @@ type CompositeCookie struct {
 // Composite sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func Composite(c *xgb.Conn, Op byte, Src Picture, Mask Picture, Dst Picture, SrcX int16, SrcY int16, MaskX int16, MaskY int16, DstX int16, DstY int16, Width uint16, Height uint16) CompositeCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'Composite' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(compositeRequest(c, Op, Src, Mask, Dst, SrcX, SrcY, MaskX, MaskY, DstX, DstY, Width, Height), cookie)
 	return CompositeCookie{cookie}
@@ -2114,6 +2159,9 @@ func Composite(c *xgb.Conn, Op byte, Src Picture, Mask Picture, Dst Picture, Src
 // CompositeChecked sends a checked request.
 // If an error occurs, it can be retrieved using CompositeCookie.Check()
 func CompositeChecked(c *xgb.Conn, Op byte, Src Picture, Mask Picture, Dst Picture, SrcX int16, SrcY int16, MaskX int16, MaskY int16, DstX int16, DstY int16, Width uint16, Height uint16) CompositeCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'Composite' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(compositeRequest(c, Op, Src, Mask, Dst, SrcX, SrcY, MaskX, MaskY, DstX, DstY, Width, Height), cookie)
 	return CompositeCookie{cookie}
@@ -2190,6 +2238,9 @@ type TrapezoidsCookie struct {
 // Trapezoids sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func Trapezoids(c *xgb.Conn, Op byte, Src Picture, Dst Picture, MaskFormat Pictformat, SrcX int16, SrcY int16, Traps []Trapezoid) TrapezoidsCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'Trapezoids' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(trapezoidsRequest(c, Op, Src, Dst, MaskFormat, SrcX, SrcY, Traps), cookie)
 	return TrapezoidsCookie{cookie}
@@ -2198,6 +2249,9 @@ func Trapezoids(c *xgb.Conn, Op byte, Src Picture, Dst Picture, MaskFormat Pictf
 // TrapezoidsChecked sends a checked request.
 // If an error occurs, it can be retrieved using TrapezoidsCookie.Check()
 func TrapezoidsChecked(c *xgb.Conn, Op byte, Src Picture, Dst Picture, MaskFormat Pictformat, SrcX int16, SrcY int16, Traps []Trapezoid) TrapezoidsCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'Trapezoids' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(trapezoidsRequest(c, Op, Src, Dst, MaskFormat, SrcX, SrcY, Traps), cookie)
 	return TrapezoidsCookie{cookie}
@@ -2258,6 +2312,9 @@ type TrianglesCookie struct {
 // Triangles sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func Triangles(c *xgb.Conn, Op byte, Src Picture, Dst Picture, MaskFormat Pictformat, SrcX int16, SrcY int16, Triangles []Triangle) TrianglesCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'Triangles' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(trianglesRequest(c, Op, Src, Dst, MaskFormat, SrcX, SrcY, Triangles), cookie)
 	return TrianglesCookie{cookie}
@@ -2266,6 +2323,9 @@ func Triangles(c *xgb.Conn, Op byte, Src Picture, Dst Picture, MaskFormat Pictfo
 // TrianglesChecked sends a checked request.
 // If an error occurs, it can be retrieved using TrianglesCookie.Check()
 func TrianglesChecked(c *xgb.Conn, Op byte, Src Picture, Dst Picture, MaskFormat Pictformat, SrcX int16, SrcY int16, Triangles []Triangle) TrianglesCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'Triangles' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(trianglesRequest(c, Op, Src, Dst, MaskFormat, SrcX, SrcY, Triangles), cookie)
 	return TrianglesCookie{cookie}
@@ -2326,6 +2386,9 @@ type TriStripCookie struct {
 // TriStrip sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func TriStrip(c *xgb.Conn, Op byte, Src Picture, Dst Picture, MaskFormat Pictformat, SrcX int16, SrcY int16, Points []Pointfix) TriStripCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'TriStrip' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(triStripRequest(c, Op, Src, Dst, MaskFormat, SrcX, SrcY, Points), cookie)
 	return TriStripCookie{cookie}
@@ -2334,6 +2397,9 @@ func TriStrip(c *xgb.Conn, Op byte, Src Picture, Dst Picture, MaskFormat Pictfor
 // TriStripChecked sends a checked request.
 // If an error occurs, it can be retrieved using TriStripCookie.Check()
 func TriStripChecked(c *xgb.Conn, Op byte, Src Picture, Dst Picture, MaskFormat Pictformat, SrcX int16, SrcY int16, Points []Pointfix) TriStripCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'TriStrip' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(triStripRequest(c, Op, Src, Dst, MaskFormat, SrcX, SrcY, Points), cookie)
 	return TriStripCookie{cookie}
@@ -2394,6 +2460,9 @@ type TriFanCookie struct {
 // TriFan sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func TriFan(c *xgb.Conn, Op byte, Src Picture, Dst Picture, MaskFormat Pictformat, SrcX int16, SrcY int16, Points []Pointfix) TriFanCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'TriFan' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(triFanRequest(c, Op, Src, Dst, MaskFormat, SrcX, SrcY, Points), cookie)
 	return TriFanCookie{cookie}
@@ -2402,6 +2471,9 @@ func TriFan(c *xgb.Conn, Op byte, Src Picture, Dst Picture, MaskFormat Pictforma
 // TriFanChecked sends a checked request.
 // If an error occurs, it can be retrieved using TriFanCookie.Check()
 func TriFanChecked(c *xgb.Conn, Op byte, Src Picture, Dst Picture, MaskFormat Pictformat, SrcX int16, SrcY int16, Points []Pointfix) TriFanCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'TriFan' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(triFanRequest(c, Op, Src, Dst, MaskFormat, SrcX, SrcY, Points), cookie)
 	return TriFanCookie{cookie}
@@ -2462,6 +2534,9 @@ type CreateGlyphSetCookie struct {
 // CreateGlyphSet sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateGlyphSet(c *xgb.Conn, Gsid Glyphset, Format Pictformat) CreateGlyphSetCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'CreateGlyphSet' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createGlyphSetRequest(c, Gsid, Format), cookie)
 	return CreateGlyphSetCookie{cookie}
@@ -2470,6 +2545,9 @@ func CreateGlyphSet(c *xgb.Conn, Gsid Glyphset, Format Pictformat) CreateGlyphSe
 // CreateGlyphSetChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreateGlyphSetCookie.Check()
 func CreateGlyphSetChecked(c *xgb.Conn, Gsid Glyphset, Format Pictformat) CreateGlyphSetCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'CreateGlyphSet' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createGlyphSetRequest(c, Gsid, Format), cookie)
 	return CreateGlyphSetCookie{cookie}
@@ -2514,6 +2592,9 @@ type ReferenceGlyphSetCookie struct {
 // ReferenceGlyphSet sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ReferenceGlyphSet(c *xgb.Conn, Gsid Glyphset, Existing Glyphset) ReferenceGlyphSetCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'ReferenceGlyphSet' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(referenceGlyphSetRequest(c, Gsid, Existing), cookie)
 	return ReferenceGlyphSetCookie{cookie}
@@ -2522,6 +2603,9 @@ func ReferenceGlyphSet(c *xgb.Conn, Gsid Glyphset, Existing Glyphset) ReferenceG
 // ReferenceGlyphSetChecked sends a checked request.
 // If an error occurs, it can be retrieved using ReferenceGlyphSetCookie.Check()
 func ReferenceGlyphSetChecked(c *xgb.Conn, Gsid Glyphset, Existing Glyphset) ReferenceGlyphSetCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'ReferenceGlyphSet' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(referenceGlyphSetRequest(c, Gsid, Existing), cookie)
 	return ReferenceGlyphSetCookie{cookie}
@@ -2566,6 +2650,9 @@ type FreeGlyphSetCookie struct {
 // FreeGlyphSet sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func FreeGlyphSet(c *xgb.Conn, Glyphset Glyphset) FreeGlyphSetCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'FreeGlyphSet' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(freeGlyphSetRequest(c, Glyphset), cookie)
 	return FreeGlyphSetCookie{cookie}
@@ -2574,6 +2661,9 @@ func FreeGlyphSet(c *xgb.Conn, Glyphset Glyphset) FreeGlyphSetCookie {
 // FreeGlyphSetChecked sends a checked request.
 // If an error occurs, it can be retrieved using FreeGlyphSetCookie.Check()
 func FreeGlyphSetChecked(c *xgb.Conn, Glyphset Glyphset) FreeGlyphSetCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'FreeGlyphSet' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(freeGlyphSetRequest(c, Glyphset), cookie)
 	return FreeGlyphSetCookie{cookie}
@@ -2615,6 +2705,9 @@ type AddGlyphsCookie struct {
 // AddGlyphs sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func AddGlyphs(c *xgb.Conn, Glyphset Glyphset, GlyphsLen uint32, Glyphids []uint32, Glyphs []Glyphinfo, Data []byte) AddGlyphsCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'AddGlyphs' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(addGlyphsRequest(c, Glyphset, GlyphsLen, Glyphids, Glyphs, Data), cookie)
 	return AddGlyphsCookie{cookie}
@@ -2623,6 +2716,9 @@ func AddGlyphs(c *xgb.Conn, Glyphset Glyphset, GlyphsLen uint32, Glyphids []uint
 // AddGlyphsChecked sends a checked request.
 // If an error occurs, it can be retrieved using AddGlyphsCookie.Check()
 func AddGlyphsChecked(c *xgb.Conn, Glyphset Glyphset, GlyphsLen uint32, Glyphids []uint32, Glyphs []Glyphinfo, Data []byte) AddGlyphsCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'AddGlyphs' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(addGlyphsRequest(c, Glyphset, GlyphsLen, Glyphids, Glyphs, Data), cookie)
 	return AddGlyphsCookie{cookie}
@@ -2678,6 +2774,9 @@ type FreeGlyphsCookie struct {
 // FreeGlyphs sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func FreeGlyphs(c *xgb.Conn, Glyphset Glyphset, Glyphs []Glyph) FreeGlyphsCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'FreeGlyphs' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(freeGlyphsRequest(c, Glyphset, Glyphs), cookie)
 	return FreeGlyphsCookie{cookie}
@@ -2686,6 +2785,9 @@ func FreeGlyphs(c *xgb.Conn, Glyphset Glyphset, Glyphs []Glyph) FreeGlyphsCookie
 // FreeGlyphsChecked sends a checked request.
 // If an error occurs, it can be retrieved using FreeGlyphsCookie.Check()
 func FreeGlyphsChecked(c *xgb.Conn, Glyphset Glyphset, Glyphs []Glyph) FreeGlyphsCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'FreeGlyphs' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(freeGlyphsRequest(c, Glyphset, Glyphs), cookie)
 	return FreeGlyphsCookie{cookie}
@@ -2733,6 +2835,9 @@ type CompositeGlyphs8Cookie struct {
 // CompositeGlyphs8 sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CompositeGlyphs8(c *xgb.Conn, Op byte, Src Picture, Dst Picture, MaskFormat Pictformat, Glyphset Glyphset, SrcX int16, SrcY int16, Glyphcmds []byte) CompositeGlyphs8Cookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'CompositeGlyphs8' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(compositeGlyphs8Request(c, Op, Src, Dst, MaskFormat, Glyphset, SrcX, SrcY, Glyphcmds), cookie)
 	return CompositeGlyphs8Cookie{cookie}
@@ -2741,6 +2846,9 @@ func CompositeGlyphs8(c *xgb.Conn, Op byte, Src Picture, Dst Picture, MaskFormat
 // CompositeGlyphs8Checked sends a checked request.
 // If an error occurs, it can be retrieved using CompositeGlyphs8Cookie.Check()
 func CompositeGlyphs8Checked(c *xgb.Conn, Op byte, Src Picture, Dst Picture, MaskFormat Pictformat, Glyphset Glyphset, SrcX int16, SrcY int16, Glyphcmds []byte) CompositeGlyphs8Cookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'CompositeGlyphs8' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(compositeGlyphs8Request(c, Op, Src, Dst, MaskFormat, Glyphset, SrcX, SrcY, Glyphcmds), cookie)
 	return CompositeGlyphs8Cookie{cookie}
@@ -2805,6 +2913,9 @@ type CompositeGlyphs16Cookie struct {
 // CompositeGlyphs16 sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CompositeGlyphs16(c *xgb.Conn, Op byte, Src Picture, Dst Picture, MaskFormat Pictformat, Glyphset Glyphset, SrcX int16, SrcY int16, Glyphcmds []byte) CompositeGlyphs16Cookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'CompositeGlyphs16' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(compositeGlyphs16Request(c, Op, Src, Dst, MaskFormat, Glyphset, SrcX, SrcY, Glyphcmds), cookie)
 	return CompositeGlyphs16Cookie{cookie}
@@ -2813,6 +2924,9 @@ func CompositeGlyphs16(c *xgb.Conn, Op byte, Src Picture, Dst Picture, MaskForma
 // CompositeGlyphs16Checked sends a checked request.
 // If an error occurs, it can be retrieved using CompositeGlyphs16Cookie.Check()
 func CompositeGlyphs16Checked(c *xgb.Conn, Op byte, Src Picture, Dst Picture, MaskFormat Pictformat, Glyphset Glyphset, SrcX int16, SrcY int16, Glyphcmds []byte) CompositeGlyphs16Cookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'CompositeGlyphs16' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(compositeGlyphs16Request(c, Op, Src, Dst, MaskFormat, Glyphset, SrcX, SrcY, Glyphcmds), cookie)
 	return CompositeGlyphs16Cookie{cookie}
@@ -2877,6 +2991,9 @@ type CompositeGlyphs32Cookie struct {
 // CompositeGlyphs32 sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CompositeGlyphs32(c *xgb.Conn, Op byte, Src Picture, Dst Picture, MaskFormat Pictformat, Glyphset Glyphset, SrcX int16, SrcY int16, Glyphcmds []byte) CompositeGlyphs32Cookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'CompositeGlyphs32' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(compositeGlyphs32Request(c, Op, Src, Dst, MaskFormat, Glyphset, SrcX, SrcY, Glyphcmds), cookie)
 	return CompositeGlyphs32Cookie{cookie}
@@ -2885,6 +3002,9 @@ func CompositeGlyphs32(c *xgb.Conn, Op byte, Src Picture, Dst Picture, MaskForma
 // CompositeGlyphs32Checked sends a checked request.
 // If an error occurs, it can be retrieved using CompositeGlyphs32Cookie.Check()
 func CompositeGlyphs32Checked(c *xgb.Conn, Op byte, Src Picture, Dst Picture, MaskFormat Pictformat, Glyphset Glyphset, SrcX int16, SrcY int16, Glyphcmds []byte) CompositeGlyphs32Cookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'CompositeGlyphs32' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(compositeGlyphs32Request(c, Op, Src, Dst, MaskFormat, Glyphset, SrcX, SrcY, Glyphcmds), cookie)
 	return CompositeGlyphs32Cookie{cookie}
@@ -2949,6 +3069,9 @@ type FillRectanglesCookie struct {
 // FillRectangles sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func FillRectangles(c *xgb.Conn, Op byte, Dst Picture, Color Color, Rects []xproto.Rectangle) FillRectanglesCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'FillRectangles' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(fillRectanglesRequest(c, Op, Dst, Color, Rects), cookie)
 	return FillRectanglesCookie{cookie}
@@ -2957,6 +3080,9 @@ func FillRectangles(c *xgb.Conn, Op byte, Dst Picture, Color Color, Rects []xpro
 // FillRectanglesChecked sends a checked request.
 // If an error occurs, it can be retrieved using FillRectanglesCookie.Check()
 func FillRectanglesChecked(c *xgb.Conn, Op byte, Dst Picture, Color Color, Rects []xproto.Rectangle) FillRectanglesCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'FillRectangles' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(fillRectanglesRequest(c, Op, Dst, Color, Rects), cookie)
 	return FillRectanglesCookie{cookie}
@@ -3011,6 +3137,9 @@ type CreateCursorCookie struct {
 // CreateCursor sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateCursor(c *xgb.Conn, Cid xproto.Cursor, Source Picture, X uint16, Y uint16) CreateCursorCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'CreateCursor' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createCursorRequest(c, Cid, Source, X, Y), cookie)
 	return CreateCursorCookie{cookie}
@@ -3019,6 +3148,9 @@ func CreateCursor(c *xgb.Conn, Cid xproto.Cursor, Source Picture, X uint16, Y ui
 // CreateCursorChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreateCursorCookie.Check()
 func CreateCursorChecked(c *xgb.Conn, Cid xproto.Cursor, Source Picture, X uint16, Y uint16) CreateCursorCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'CreateCursor' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createCursorRequest(c, Cid, Source, X, Y), cookie)
 	return CreateCursorCookie{cookie}
@@ -3069,6 +3201,9 @@ type SetPictureTransformCookie struct {
 // SetPictureTransform sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetPictureTransform(c *xgb.Conn, Picture Picture, Transform Transform) SetPictureTransformCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'SetPictureTransform' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setPictureTransformRequest(c, Picture, Transform), cookie)
 	return SetPictureTransformCookie{cookie}
@@ -3077,6 +3212,9 @@ func SetPictureTransform(c *xgb.Conn, Picture Picture, Transform Transform) SetP
 // SetPictureTransformChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetPictureTransformCookie.Check()
 func SetPictureTransformChecked(c *xgb.Conn, Picture Picture, Transform Transform) SetPictureTransformCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'SetPictureTransform' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setPictureTransformRequest(c, Picture, Transform), cookie)
 	return SetPictureTransformCookie{cookie}
@@ -3124,6 +3262,9 @@ type QueryFiltersCookie struct {
 // QueryFilters sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryFiltersCookie.Reply()
 func QueryFilters(c *xgb.Conn, Drawable xproto.Drawable) QueryFiltersCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'QueryFilters' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryFiltersRequest(c, Drawable), cookie)
 	return QueryFiltersCookie{cookie}
@@ -3132,6 +3273,9 @@ func QueryFilters(c *xgb.Conn, Drawable xproto.Drawable) QueryFiltersCookie {
 // QueryFiltersUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryFiltersUnchecked(c *xgb.Conn, Drawable xproto.Drawable) QueryFiltersCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'QueryFilters' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryFiltersRequest(c, Drawable), cookie)
 	return QueryFiltersCookie{cookie}
@@ -3225,6 +3369,9 @@ type SetPictureFilterCookie struct {
 // SetPictureFilter sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetPictureFilter(c *xgb.Conn, Picture Picture, FilterLen uint16, Filter string, Values []Fixed) SetPictureFilterCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'SetPictureFilter' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setPictureFilterRequest(c, Picture, FilterLen, Filter, Values), cookie)
 	return SetPictureFilterCookie{cookie}
@@ -3233,6 +3380,9 @@ func SetPictureFilter(c *xgb.Conn, Picture Picture, FilterLen uint16, Filter str
 // SetPictureFilterChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetPictureFilterCookie.Check()
 func SetPictureFilterChecked(c *xgb.Conn, Picture Picture, FilterLen uint16, Filter string, Values []Fixed) SetPictureFilterCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'SetPictureFilter' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setPictureFilterRequest(c, Picture, FilterLen, Filter, Values), cookie)
 	return SetPictureFilterCookie{cookie}
@@ -3288,6 +3438,9 @@ type CreateAnimCursorCookie struct {
 // CreateAnimCursor sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateAnimCursor(c *xgb.Conn, Cid xproto.Cursor, Cursors []Animcursorelt) CreateAnimCursorCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'CreateAnimCursor' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createAnimCursorRequest(c, Cid, Cursors), cookie)
 	return CreateAnimCursorCookie{cookie}
@@ -3296,6 +3449,9 @@ func CreateAnimCursor(c *xgb.Conn, Cid xproto.Cursor, Cursors []Animcursorelt) C
 // CreateAnimCursorChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreateAnimCursorCookie.Check()
 func CreateAnimCursorChecked(c *xgb.Conn, Cid xproto.Cursor, Cursors []Animcursorelt) CreateAnimCursorCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'CreateAnimCursor' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createAnimCursorRequest(c, Cid, Cursors), cookie)
 	return CreateAnimCursorCookie{cookie}
@@ -3339,6 +3495,9 @@ type AddTrapsCookie struct {
 // AddTraps sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func AddTraps(c *xgb.Conn, Picture Picture, XOff int16, YOff int16, Traps []Trap) AddTrapsCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'AddTraps' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(addTrapsRequest(c, Picture, XOff, YOff, Traps), cookie)
 	return AddTrapsCookie{cookie}
@@ -3347,6 +3506,9 @@ func AddTraps(c *xgb.Conn, Picture Picture, XOff int16, YOff int16, Traps []Trap
 // AddTrapsChecked sends a checked request.
 // If an error occurs, it can be retrieved using AddTrapsCookie.Check()
 func AddTrapsChecked(c *xgb.Conn, Picture Picture, XOff int16, YOff int16, Traps []Trap) AddTrapsCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'AddTraps' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(addTrapsRequest(c, Picture, XOff, YOff, Traps), cookie)
 	return AddTrapsCookie{cookie}
@@ -3396,6 +3558,9 @@ type CreateSolidFillCookie struct {
 // CreateSolidFill sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateSolidFill(c *xgb.Conn, Picture Picture, Color Color) CreateSolidFillCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'CreateSolidFill' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createSolidFillRequest(c, Picture, Color), cookie)
 	return CreateSolidFillCookie{cookie}
@@ -3404,6 +3569,9 @@ func CreateSolidFill(c *xgb.Conn, Picture Picture, Color Color) CreateSolidFillC
 // CreateSolidFillChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreateSolidFillCookie.Check()
 func CreateSolidFillChecked(c *xgb.Conn, Picture Picture, Color Color) CreateSolidFillCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'CreateSolidFill' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createSolidFillRequest(c, Picture, Color), cookie)
 	return CreateSolidFillCookie{cookie}
@@ -3451,6 +3619,9 @@ type CreateLinearGradientCookie struct {
 // CreateLinearGradient sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateLinearGradient(c *xgb.Conn, Picture Picture, P1 Pointfix, P2 Pointfix, NumStops uint32, Stops []Fixed, Colors []Color) CreateLinearGradientCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'CreateLinearGradient' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createLinearGradientRequest(c, Picture, P1, P2, NumStops, Stops, Colors), cookie)
 	return CreateLinearGradientCookie{cookie}
@@ -3459,6 +3630,9 @@ func CreateLinearGradient(c *xgb.Conn, Picture Picture, P1 Pointfix, P2 Pointfix
 // CreateLinearGradientChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreateLinearGradientCookie.Check()
 func CreateLinearGradientChecked(c *xgb.Conn, Picture Picture, P1 Pointfix, P2 Pointfix, NumStops uint32, Stops []Fixed, Colors []Color) CreateLinearGradientCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'CreateLinearGradient' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createLinearGradientRequest(c, Picture, P1, P2, NumStops, Stops, Colors), cookie)
 	return CreateLinearGradientCookie{cookie}
@@ -3523,6 +3697,9 @@ type CreateRadialGradientCookie struct {
 // CreateRadialGradient sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateRadialGradient(c *xgb.Conn, Picture Picture, Inner Pointfix, Outer Pointfix, InnerRadius Fixed, OuterRadius Fixed, NumStops uint32, Stops []Fixed, Colors []Color) CreateRadialGradientCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'CreateRadialGradient' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createRadialGradientRequest(c, Picture, Inner, Outer, InnerRadius, OuterRadius, NumStops, Stops, Colors), cookie)
 	return CreateRadialGradientCookie{cookie}
@@ -3531,6 +3708,9 @@ func CreateRadialGradient(c *xgb.Conn, Picture Picture, Inner Pointfix, Outer Po
 // CreateRadialGradientChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreateRadialGradientCookie.Check()
 func CreateRadialGradientChecked(c *xgb.Conn, Picture Picture, Inner Pointfix, Outer Pointfix, InnerRadius Fixed, OuterRadius Fixed, NumStops uint32, Stops []Fixed, Colors []Color) CreateRadialGradientCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'CreateRadialGradient' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createRadialGradientRequest(c, Picture, Inner, Outer, InnerRadius, OuterRadius, NumStops, Stops, Colors), cookie)
 	return CreateRadialGradientCookie{cookie}
@@ -3601,6 +3781,9 @@ type CreateConicalGradientCookie struct {
 // CreateConicalGradient sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateConicalGradient(c *xgb.Conn, Picture Picture, Center Pointfix, Angle Fixed, NumStops uint32, Stops []Fixed, Colors []Color) CreateConicalGradientCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'CreateConicalGradient' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createConicalGradientRequest(c, Picture, Center, Angle, NumStops, Stops, Colors), cookie)
 	return CreateConicalGradientCookie{cookie}
@@ -3609,6 +3792,9 @@ func CreateConicalGradient(c *xgb.Conn, Picture Picture, Center Pointfix, Angle
 // CreateConicalGradientChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreateConicalGradientCookie.Check()
 func CreateConicalGradientChecked(c *xgb.Conn, Picture Picture, Center Pointfix, Angle Fixed, NumStops uint32, Stops []Fixed, Colors []Color) CreateConicalGradientCookie {
+	if _, ok := c.Extensions["RENDER"]; !ok {
+		panic("Cannot issue request 'CreateConicalGradient' using the uninitialized extension 'RENDER'. render.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createConicalGradientRequest(c, Picture, Center, Angle, NumStops, Stops, Colors), cookie)
 	return CreateConicalGradientCookie{cookie}
diff --git a/nexgb/res/res.go b/nexgb/res/res.go
index 56f4691..c5700c3 100644
--- a/nexgb/res/res.go
+++ b/nexgb/res/res.go
@@ -2,7 +2,7 @@
 package res
 
 /*
-	This file was generated by res.xml on May 11 2012 1:58:36am EDT.
+	This file was generated by res.xml on May 11 2012 11:57:19pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -40,6 +40,12 @@ func init() {
 	xgb.NewExtErrorFuncs["X-Resource"] = make(map[int]xgb.NewErrorFun)
 }
 
+// Skipping definition for base type 'Int8'
+
+// Skipping definition for base type 'Card16'
+
+// Skipping definition for base type 'Char'
+
 // Skipping definition for base type 'Card32'
 
 // Skipping definition for base type 'Double'
@@ -58,12 +64,6 @@ func init() {
 
 // Skipping definition for base type 'Byte'
 
-// Skipping definition for base type 'Int8'
-
-// Skipping definition for base type 'Card16'
-
-// Skipping definition for base type 'Char'
-
 type Client struct {
 	ResourceBase uint32
 	ResourceMask uint32
@@ -180,6 +180,9 @@ type QueryVersionCookie struct {
 // QueryVersion sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryVersionCookie.Reply()
 func QueryVersion(c *xgb.Conn, ClientMajor byte, ClientMinor byte) QueryVersionCookie {
+	if _, ok := c.Extensions["X-RESOURCE"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'X-Resource'. res.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryVersionRequest(c, ClientMajor, ClientMinor), cookie)
 	return QueryVersionCookie{cookie}
@@ -188,6 +191,9 @@ func QueryVersion(c *xgb.Conn, ClientMajor byte, ClientMinor byte) QueryVersionC
 // QueryVersionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryVersionUnchecked(c *xgb.Conn, ClientMajor byte, ClientMinor byte) QueryVersionCookie {
+	if _, ok := c.Extensions["X-RESOURCE"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'X-Resource'. res.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryVersionRequest(c, ClientMajor, ClientMinor), cookie)
 	return QueryVersionCookie{cookie}
@@ -269,6 +275,9 @@ type QueryClientsCookie struct {
 // QueryClients sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryClientsCookie.Reply()
 func QueryClients(c *xgb.Conn) QueryClientsCookie {
+	if _, ok := c.Extensions["X-RESOURCE"]; !ok {
+		panic("Cannot issue request 'QueryClients' using the uninitialized extension 'X-Resource'. res.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryClientsRequest(c), cookie)
 	return QueryClientsCookie{cookie}
@@ -277,6 +286,9 @@ func QueryClients(c *xgb.Conn) QueryClientsCookie {
 // QueryClientsUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryClientsUnchecked(c *xgb.Conn) QueryClientsCookie {
+	if _, ok := c.Extensions["X-RESOURCE"]; !ok {
+		panic("Cannot issue request 'QueryClients' using the uninitialized extension 'X-Resource'. res.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryClientsRequest(c), cookie)
 	return QueryClientsCookie{cookie}
@@ -355,6 +367,9 @@ type QueryClientResourcesCookie struct {
 // QueryClientResources sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryClientResourcesCookie.Reply()
 func QueryClientResources(c *xgb.Conn, Xid uint32) QueryClientResourcesCookie {
+	if _, ok := c.Extensions["X-RESOURCE"]; !ok {
+		panic("Cannot issue request 'QueryClientResources' using the uninitialized extension 'X-Resource'. res.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryClientResourcesRequest(c, Xid), cookie)
 	return QueryClientResourcesCookie{cookie}
@@ -363,6 +378,9 @@ func QueryClientResources(c *xgb.Conn, Xid uint32) QueryClientResourcesCookie {
 // QueryClientResourcesUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryClientResourcesUnchecked(c *xgb.Conn, Xid uint32) QueryClientResourcesCookie {
+	if _, ok := c.Extensions["X-RESOURCE"]; !ok {
+		panic("Cannot issue request 'QueryClientResources' using the uninitialized extension 'X-Resource'. res.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryClientResourcesRequest(c, Xid), cookie)
 	return QueryClientResourcesCookie{cookie}
@@ -444,6 +462,9 @@ type QueryClientPixmapBytesCookie struct {
 // QueryClientPixmapBytes sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryClientPixmapBytesCookie.Reply()
 func QueryClientPixmapBytes(c *xgb.Conn, Xid uint32) QueryClientPixmapBytesCookie {
+	if _, ok := c.Extensions["X-RESOURCE"]; !ok {
+		panic("Cannot issue request 'QueryClientPixmapBytes' using the uninitialized extension 'X-Resource'. res.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryClientPixmapBytesRequest(c, Xid), cookie)
 	return QueryClientPixmapBytesCookie{cookie}
@@ -452,6 +473,9 @@ func QueryClientPixmapBytes(c *xgb.Conn, Xid uint32) QueryClientPixmapBytesCooki
 // QueryClientPixmapBytesUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryClientPixmapBytesUnchecked(c *xgb.Conn, Xid uint32) QueryClientPixmapBytesCookie {
+	if _, ok := c.Extensions["X-RESOURCE"]; !ok {
+		panic("Cannot issue request 'QueryClientPixmapBytes' using the uninitialized extension 'X-Resource'. res.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryClientPixmapBytesRequest(c, Xid), cookie)
 	return QueryClientPixmapBytesCookie{cookie}
diff --git a/nexgb/screensaver/screensaver.go b/nexgb/screensaver/screensaver.go
index 932e753..a06d8a6 100644
--- a/nexgb/screensaver/screensaver.go
+++ b/nexgb/screensaver/screensaver.go
@@ -2,7 +2,7 @@
 package screensaver
 
 /*
-	This file was generated by screensaver.xml on May 11 2012 1:58:36am EDT.
+	This file was generated by screensaver.xml on May 11 2012 11:57:19pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -40,12 +40,6 @@ func init() {
 	xgb.NewExtErrorFuncs["MIT-SCREEN-SAVER"] = make(map[int]xgb.NewErrorFun)
 }
 
-// Skipping definition for base type 'Int16'
-
-// Skipping definition for base type 'Int32'
-
-// Skipping definition for base type 'Void'
-
 // Skipping definition for base type 'Byte'
 
 // Skipping definition for base type 'Int8'
@@ -64,6 +58,12 @@ func init() {
 
 // Skipping definition for base type 'Card8'
 
+// Skipping definition for base type 'Int16'
+
+// Skipping definition for base type 'Int32'
+
+// Skipping definition for base type 'Void'
+
 const (
 	KindBlanked  = 0
 	KindInternal = 1
@@ -222,6 +222,9 @@ type QueryVersionCookie struct {
 // QueryVersion sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryVersionCookie.Reply()
 func QueryVersion(c *xgb.Conn, ClientMajorVersion byte, ClientMinorVersion byte) QueryVersionCookie {
+	if _, ok := c.Extensions["MIT-SCREEN-SAVER"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'MIT-SCREEN-SAVER'. screensaver.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryVersionRequest(c, ClientMajorVersion, ClientMinorVersion), cookie)
 	return QueryVersionCookie{cookie}
@@ -230,6 +233,9 @@ func QueryVersion(c *xgb.Conn, ClientMajorVersion byte, ClientMinorVersion byte)
 // QueryVersionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryVersionUnchecked(c *xgb.Conn, ClientMajorVersion byte, ClientMinorVersion byte) QueryVersionCookie {
+	if _, ok := c.Extensions["MIT-SCREEN-SAVER"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'MIT-SCREEN-SAVER'. screensaver.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryVersionRequest(c, ClientMajorVersion, ClientMinorVersion), cookie)
 	return QueryVersionCookie{cookie}
@@ -316,6 +322,9 @@ type QueryInfoCookie struct {
 // QueryInfo sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryInfoCookie.Reply()
 func QueryInfo(c *xgb.Conn, Drawable xproto.Drawable) QueryInfoCookie {
+	if _, ok := c.Extensions["MIT-SCREEN-SAVER"]; !ok {
+		panic("Cannot issue request 'QueryInfo' using the uninitialized extension 'MIT-SCREEN-SAVER'. screensaver.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryInfoRequest(c, Drawable), cookie)
 	return QueryInfoCookie{cookie}
@@ -324,6 +333,9 @@ func QueryInfo(c *xgb.Conn, Drawable xproto.Drawable) QueryInfoCookie {
 // QueryInfoUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryInfoUnchecked(c *xgb.Conn, Drawable xproto.Drawable) QueryInfoCookie {
+	if _, ok := c.Extensions["MIT-SCREEN-SAVER"]; !ok {
+		panic("Cannot issue request 'QueryInfo' using the uninitialized extension 'MIT-SCREEN-SAVER'. screensaver.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryInfoRequest(c, Drawable), cookie)
 	return QueryInfoCookie{cookie}
@@ -418,6 +430,9 @@ type SelectInputCookie struct {
 // SelectInput sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SelectInput(c *xgb.Conn, Drawable xproto.Drawable, EventMask uint32) SelectInputCookie {
+	if _, ok := c.Extensions["MIT-SCREEN-SAVER"]; !ok {
+		panic("Cannot issue request 'SelectInput' using the uninitialized extension 'MIT-SCREEN-SAVER'. screensaver.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(selectInputRequest(c, Drawable, EventMask), cookie)
 	return SelectInputCookie{cookie}
@@ -426,6 +441,9 @@ func SelectInput(c *xgb.Conn, Drawable xproto.Drawable, EventMask uint32) Select
 // SelectInputChecked sends a checked request.
 // If an error occurs, it can be retrieved using SelectInputCookie.Check()
 func SelectInputChecked(c *xgb.Conn, Drawable xproto.Drawable, EventMask uint32) SelectInputCookie {
+	if _, ok := c.Extensions["MIT-SCREEN-SAVER"]; !ok {
+		panic("Cannot issue request 'SelectInput' using the uninitialized extension 'MIT-SCREEN-SAVER'. screensaver.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(selectInputRequest(c, Drawable, EventMask), cookie)
 	return SelectInputCookie{cookie}
@@ -470,6 +488,9 @@ type SetAttributesCookie struct {
 // SetAttributes sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetAttributes(c *xgb.Conn, Drawable xproto.Drawable, X int16, Y int16, Width uint16, Height uint16, BorderWidth uint16, Class byte, Depth byte, Visual xproto.Visualid, ValueMask uint32, ValueList []uint32) SetAttributesCookie {
+	if _, ok := c.Extensions["MIT-SCREEN-SAVER"]; !ok {
+		panic("Cannot issue request 'SetAttributes' using the uninitialized extension 'MIT-SCREEN-SAVER'. screensaver.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setAttributesRequest(c, Drawable, X, Y, Width, Height, BorderWidth, Class, Depth, Visual, ValueMask, ValueList), cookie)
 	return SetAttributesCookie{cookie}
@@ -478,6 +499,9 @@ func SetAttributes(c *xgb.Conn, Drawable xproto.Drawable, X int16, Y int16, Widt
 // SetAttributesChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetAttributesCookie.Check()
 func SetAttributesChecked(c *xgb.Conn, Drawable xproto.Drawable, X int16, Y int16, Width uint16, Height uint16, BorderWidth uint16, Class byte, Depth byte, Visual xproto.Visualid, ValueMask uint32, ValueList []uint32) SetAttributesCookie {
+	if _, ok := c.Extensions["MIT-SCREEN-SAVER"]; !ok {
+		panic("Cannot issue request 'SetAttributes' using the uninitialized extension 'MIT-SCREEN-SAVER'. screensaver.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setAttributesRequest(c, Drawable, X, Y, Width, Height, BorderWidth, Class, Depth, Visual, ValueMask, ValueList), cookie)
 	return SetAttributesCookie{cookie}
@@ -551,6 +575,9 @@ type UnsetAttributesCookie struct {
 // UnsetAttributes sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func UnsetAttributes(c *xgb.Conn, Drawable xproto.Drawable) UnsetAttributesCookie {
+	if _, ok := c.Extensions["MIT-SCREEN-SAVER"]; !ok {
+		panic("Cannot issue request 'UnsetAttributes' using the uninitialized extension 'MIT-SCREEN-SAVER'. screensaver.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(unsetAttributesRequest(c, Drawable), cookie)
 	return UnsetAttributesCookie{cookie}
@@ -559,6 +586,9 @@ func UnsetAttributes(c *xgb.Conn, Drawable xproto.Drawable) UnsetAttributesCooki
 // UnsetAttributesChecked sends a checked request.
 // If an error occurs, it can be retrieved using UnsetAttributesCookie.Check()
 func UnsetAttributesChecked(c *xgb.Conn, Drawable xproto.Drawable) UnsetAttributesCookie {
+	if _, ok := c.Extensions["MIT-SCREEN-SAVER"]; !ok {
+		panic("Cannot issue request 'UnsetAttributes' using the uninitialized extension 'MIT-SCREEN-SAVER'. screensaver.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(unsetAttributesRequest(c, Drawable), cookie)
 	return UnsetAttributesCookie{cookie}
@@ -600,6 +630,9 @@ type SuspendCookie struct {
 // Suspend sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func Suspend(c *xgb.Conn, Suspend bool) SuspendCookie {
+	if _, ok := c.Extensions["MIT-SCREEN-SAVER"]; !ok {
+		panic("Cannot issue request 'Suspend' using the uninitialized extension 'MIT-SCREEN-SAVER'. screensaver.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(suspendRequest(c, Suspend), cookie)
 	return SuspendCookie{cookie}
@@ -608,6 +641,9 @@ func Suspend(c *xgb.Conn, Suspend bool) SuspendCookie {
 // SuspendChecked sends a checked request.
 // If an error occurs, it can be retrieved using SuspendCookie.Check()
 func SuspendChecked(c *xgb.Conn, Suspend bool) SuspendCookie {
+	if _, ok := c.Extensions["MIT-SCREEN-SAVER"]; !ok {
+		panic("Cannot issue request 'Suspend' using the uninitialized extension 'MIT-SCREEN-SAVER'. screensaver.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(suspendRequest(c, Suspend), cookie)
 	return SuspendCookie{cookie}
diff --git a/nexgb/shape/shape.go b/nexgb/shape/shape.go
index 8989000..83d9020 100644
--- a/nexgb/shape/shape.go
+++ b/nexgb/shape/shape.go
@@ -2,7 +2,7 @@
 package shape
 
 /*
-	This file was generated by shape.xml on May 11 2012 1:58:36am EDT.
+	This file was generated by shape.xml on May 11 2012 11:57:19pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -40,6 +40,10 @@ func init() {
 	xgb.NewExtErrorFuncs["SHAPE"] = make(map[int]xgb.NewErrorFun)
 }
 
+// Skipping definition for base type 'Card8'
+
+// Skipping definition for base type 'Int16'
+
 // Skipping definition for base type 'Int32'
 
 // Skipping definition for base type 'Void'
@@ -60,10 +64,6 @@ func init() {
 
 // Skipping definition for base type 'Float'
 
-// Skipping definition for base type 'Card8'
-
-// Skipping definition for base type 'Int16'
-
 const (
 	SoSet       = 0
 	SoUnion     = 1
@@ -217,6 +217,9 @@ type QueryVersionCookie struct {
 // QueryVersion sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryVersionCookie.Reply()
 func QueryVersion(c *xgb.Conn) QueryVersionCookie {
+	if _, ok := c.Extensions["SHAPE"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'SHAPE'. shape.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryVersionRequest(c), cookie)
 	return QueryVersionCookie{cookie}
@@ -225,6 +228,9 @@ func QueryVersion(c *xgb.Conn) QueryVersionCookie {
 // QueryVersionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryVersionUnchecked(c *xgb.Conn) QueryVersionCookie {
+	if _, ok := c.Extensions["SHAPE"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'SHAPE'. shape.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryVersionRequest(c), cookie)
 	return QueryVersionCookie{cookie}
@@ -300,6 +306,9 @@ type RectanglesCookie struct {
 // Rectangles sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func Rectangles(c *xgb.Conn, Operation Op, DestinationKind Kind, Ordering byte, DestinationWindow xproto.Window, XOffset int16, YOffset int16, Rectangles []xproto.Rectangle) RectanglesCookie {
+	if _, ok := c.Extensions["SHAPE"]; !ok {
+		panic("Cannot issue request 'Rectangles' using the uninitialized extension 'SHAPE'. shape.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(rectanglesRequest(c, Operation, DestinationKind, Ordering, DestinationWindow, XOffset, YOffset, Rectangles), cookie)
 	return RectanglesCookie{cookie}
@@ -308,6 +317,9 @@ func Rectangles(c *xgb.Conn, Operation Op, DestinationKind Kind, Ordering byte,
 // RectanglesChecked sends a checked request.
 // If an error occurs, it can be retrieved using RectanglesCookie.Check()
 func RectanglesChecked(c *xgb.Conn, Operation Op, DestinationKind Kind, Ordering byte, DestinationWindow xproto.Window, XOffset int16, YOffset int16, Rectangles []xproto.Rectangle) RectanglesCookie {
+	if _, ok := c.Extensions["SHAPE"]; !ok {
+		panic("Cannot issue request 'Rectangles' using the uninitialized extension 'SHAPE'. shape.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(rectanglesRequest(c, Operation, DestinationKind, Ordering, DestinationWindow, XOffset, YOffset, Rectangles), cookie)
 	return RectanglesCookie{cookie}
@@ -368,6 +380,9 @@ type MaskCookie struct {
 // Mask sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func Mask(c *xgb.Conn, Operation Op, DestinationKind Kind, DestinationWindow xproto.Window, XOffset int16, YOffset int16, SourceBitmap xproto.Pixmap) MaskCookie {
+	if _, ok := c.Extensions["SHAPE"]; !ok {
+		panic("Cannot issue request 'Mask' using the uninitialized extension 'SHAPE'. shape.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(maskRequest(c, Operation, DestinationKind, DestinationWindow, XOffset, YOffset, SourceBitmap), cookie)
 	return MaskCookie{cookie}
@@ -376,6 +391,9 @@ func Mask(c *xgb.Conn, Operation Op, DestinationKind Kind, DestinationWindow xpr
 // MaskChecked sends a checked request.
 // If an error occurs, it can be retrieved using MaskCookie.Check()
 func MaskChecked(c *xgb.Conn, Operation Op, DestinationKind Kind, DestinationWindow xproto.Window, XOffset int16, YOffset int16, SourceBitmap xproto.Pixmap) MaskCookie {
+	if _, ok := c.Extensions["SHAPE"]; !ok {
+		panic("Cannot issue request 'Mask' using the uninitialized extension 'SHAPE'. shape.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(maskRequest(c, Operation, DestinationKind, DestinationWindow, XOffset, YOffset, SourceBitmap), cookie)
 	return MaskCookie{cookie}
@@ -434,6 +452,9 @@ type CombineCookie struct {
 // Combine sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func Combine(c *xgb.Conn, Operation Op, DestinationKind Kind, SourceKind Kind, DestinationWindow xproto.Window, XOffset int16, YOffset int16, SourceWindow xproto.Window) CombineCookie {
+	if _, ok := c.Extensions["SHAPE"]; !ok {
+		panic("Cannot issue request 'Combine' using the uninitialized extension 'SHAPE'. shape.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(combineRequest(c, Operation, DestinationKind, SourceKind, DestinationWindow, XOffset, YOffset, SourceWindow), cookie)
 	return CombineCookie{cookie}
@@ -442,6 +463,9 @@ func Combine(c *xgb.Conn, Operation Op, DestinationKind Kind, SourceKind Kind, D
 // CombineChecked sends a checked request.
 // If an error occurs, it can be retrieved using CombineCookie.Check()
 func CombineChecked(c *xgb.Conn, Operation Op, DestinationKind Kind, SourceKind Kind, DestinationWindow xproto.Window, XOffset int16, YOffset int16, SourceWindow xproto.Window) CombineCookie {
+	if _, ok := c.Extensions["SHAPE"]; !ok {
+		panic("Cannot issue request 'Combine' using the uninitialized extension 'SHAPE'. shape.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(combineRequest(c, Operation, DestinationKind, SourceKind, DestinationWindow, XOffset, YOffset, SourceWindow), cookie)
 	return CombineCookie{cookie}
@@ -503,6 +527,9 @@ type OffsetCookie struct {
 // Offset sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func Offset(c *xgb.Conn, DestinationKind Kind, DestinationWindow xproto.Window, XOffset int16, YOffset int16) OffsetCookie {
+	if _, ok := c.Extensions["SHAPE"]; !ok {
+		panic("Cannot issue request 'Offset' using the uninitialized extension 'SHAPE'. shape.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(offsetRequest(c, DestinationKind, DestinationWindow, XOffset, YOffset), cookie)
 	return OffsetCookie{cookie}
@@ -511,6 +538,9 @@ func Offset(c *xgb.Conn, DestinationKind Kind, DestinationWindow xproto.Window,
 // OffsetChecked sends a checked request.
 // If an error occurs, it can be retrieved using OffsetCookie.Check()
 func OffsetChecked(c *xgb.Conn, DestinationKind Kind, DestinationWindow xproto.Window, XOffset int16, YOffset int16) OffsetCookie {
+	if _, ok := c.Extensions["SHAPE"]; !ok {
+		panic("Cannot issue request 'Offset' using the uninitialized extension 'SHAPE'. shape.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(offsetRequest(c, DestinationKind, DestinationWindow, XOffset, YOffset), cookie)
 	return OffsetCookie{cookie}
@@ -563,6 +593,9 @@ type QueryExtentsCookie struct {
 // QueryExtents sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryExtentsCookie.Reply()
 func QueryExtents(c *xgb.Conn, DestinationWindow xproto.Window) QueryExtentsCookie {
+	if _, ok := c.Extensions["SHAPE"]; !ok {
+		panic("Cannot issue request 'QueryExtents' using the uninitialized extension 'SHAPE'. shape.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryExtentsRequest(c, DestinationWindow), cookie)
 	return QueryExtentsCookie{cookie}
@@ -571,6 +604,9 @@ func QueryExtents(c *xgb.Conn, DestinationWindow xproto.Window) QueryExtentsCook
 // QueryExtentsUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryExtentsUnchecked(c *xgb.Conn, DestinationWindow xproto.Window) QueryExtentsCookie {
+	if _, ok := c.Extensions["SHAPE"]; !ok {
+		panic("Cannot issue request 'QueryExtents' using the uninitialized extension 'SHAPE'. shape.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryExtentsRequest(c, DestinationWindow), cookie)
 	return QueryExtentsCookie{cookie}
@@ -692,6 +728,9 @@ type SelectInputCookie struct {
 // SelectInput sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SelectInput(c *xgb.Conn, DestinationWindow xproto.Window, Enable bool) SelectInputCookie {
+	if _, ok := c.Extensions["SHAPE"]; !ok {
+		panic("Cannot issue request 'SelectInput' using the uninitialized extension 'SHAPE'. shape.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(selectInputRequest(c, DestinationWindow, Enable), cookie)
 	return SelectInputCookie{cookie}
@@ -700,6 +739,9 @@ func SelectInput(c *xgb.Conn, DestinationWindow xproto.Window, Enable bool) Sele
 // SelectInputChecked sends a checked request.
 // If an error occurs, it can be retrieved using SelectInputCookie.Check()
 func SelectInputChecked(c *xgb.Conn, DestinationWindow xproto.Window, Enable bool) SelectInputCookie {
+	if _, ok := c.Extensions["SHAPE"]; !ok {
+		panic("Cannot issue request 'SelectInput' using the uninitialized extension 'SHAPE'. shape.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(selectInputRequest(c, DestinationWindow, Enable), cookie)
 	return SelectInputCookie{cookie}
@@ -750,6 +792,9 @@ type InputSelectedCookie struct {
 // InputSelected sends a checked request.
 // If an error occurs, it will be returned with the reply by calling InputSelectedCookie.Reply()
 func InputSelected(c *xgb.Conn, DestinationWindow xproto.Window) InputSelectedCookie {
+	if _, ok := c.Extensions["SHAPE"]; !ok {
+		panic("Cannot issue request 'InputSelected' using the uninitialized extension 'SHAPE'. shape.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(inputSelectedRequest(c, DestinationWindow), cookie)
 	return InputSelectedCookie{cookie}
@@ -758,6 +803,9 @@ func InputSelected(c *xgb.Conn, DestinationWindow xproto.Window) InputSelectedCo
 // InputSelectedUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func InputSelectedUnchecked(c *xgb.Conn, DestinationWindow xproto.Window) InputSelectedCookie {
+	if _, ok := c.Extensions["SHAPE"]; !ok {
+		panic("Cannot issue request 'InputSelected' using the uninitialized extension 'SHAPE'. shape.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(inputSelectedRequest(c, DestinationWindow), cookie)
 	return InputSelectedCookie{cookie}
@@ -833,6 +881,9 @@ type GetRectanglesCookie struct {
 // GetRectangles sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetRectanglesCookie.Reply()
 func GetRectangles(c *xgb.Conn, Window xproto.Window, SourceKind Kind) GetRectanglesCookie {
+	if _, ok := c.Extensions["SHAPE"]; !ok {
+		panic("Cannot issue request 'GetRectangles' using the uninitialized extension 'SHAPE'. shape.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getRectanglesRequest(c, Window, SourceKind), cookie)
 	return GetRectanglesCookie{cookie}
@@ -841,6 +892,9 @@ func GetRectangles(c *xgb.Conn, Window xproto.Window, SourceKind Kind) GetRectan
 // GetRectanglesUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetRectanglesUnchecked(c *xgb.Conn, Window xproto.Window, SourceKind Kind) GetRectanglesCookie {
+	if _, ok := c.Extensions["SHAPE"]; !ok {
+		panic("Cannot issue request 'GetRectangles' using the uninitialized extension 'SHAPE'. shape.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getRectanglesRequest(c, Window, SourceKind), cookie)
 	return GetRectanglesCookie{cookie}
diff --git a/nexgb/shm/shm.go b/nexgb/shm/shm.go
index 6ae886d..ac53579 100644
--- a/nexgb/shm/shm.go
+++ b/nexgb/shm/shm.go
@@ -2,7 +2,7 @@
 package shm
 
 /*
-	This file was generated by shm.xml on May 11 2012 1:58:36am EDT.
+	This file was generated by shm.xml on May 11 2012 11:57:19pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -40,6 +40,12 @@ func init() {
 	xgb.NewExtErrorFuncs["MIT-SHM"] = make(map[int]xgb.NewErrorFun)
 }
 
+// Skipping definition for base type 'Int32'
+
+// Skipping definition for base type 'Void'
+
+// Skipping definition for base type 'Byte'
+
 // Skipping definition for base type 'Int8'
 
 // Skipping definition for base type 'Card16'
@@ -58,12 +64,6 @@ func init() {
 
 // Skipping definition for base type 'Int16'
 
-// Skipping definition for base type 'Int32'
-
-// Skipping definition for base type 'Void'
-
-// Skipping definition for base type 'Byte'
-
 type Seg uint32
 
 func NewSegId(c *xgb.Conn) (Seg, error) {
@@ -220,6 +220,9 @@ type QueryVersionCookie struct {
 // QueryVersion sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryVersionCookie.Reply()
 func QueryVersion(c *xgb.Conn) QueryVersionCookie {
+	if _, ok := c.Extensions["MIT-SHM"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'MIT-SHM'. shm.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryVersionRequest(c), cookie)
 	return QueryVersionCookie{cookie}
@@ -228,6 +231,9 @@ func QueryVersion(c *xgb.Conn) QueryVersionCookie {
 // QueryVersionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryVersionUnchecked(c *xgb.Conn) QueryVersionCookie {
+	if _, ok := c.Extensions["MIT-SHM"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'MIT-SHM'. shm.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryVersionRequest(c), cookie)
 	return QueryVersionCookie{cookie}
@@ -323,6 +329,9 @@ type AttachCookie struct {
 // Attach sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func Attach(c *xgb.Conn, Shmseg Seg, Shmid uint32, ReadOnly bool) AttachCookie {
+	if _, ok := c.Extensions["MIT-SHM"]; !ok {
+		panic("Cannot issue request 'Attach' using the uninitialized extension 'MIT-SHM'. shm.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(attachRequest(c, Shmseg, Shmid, ReadOnly), cookie)
 	return AttachCookie{cookie}
@@ -331,6 +340,9 @@ func Attach(c *xgb.Conn, Shmseg Seg, Shmid uint32, ReadOnly bool) AttachCookie {
 // AttachChecked sends a checked request.
 // If an error occurs, it can be retrieved using AttachCookie.Check()
 func AttachChecked(c *xgb.Conn, Shmseg Seg, Shmid uint32, ReadOnly bool) AttachCookie {
+	if _, ok := c.Extensions["MIT-SHM"]; !ok {
+		panic("Cannot issue request 'Attach' using the uninitialized extension 'MIT-SHM'. shm.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(attachRequest(c, Shmseg, Shmid, ReadOnly), cookie)
 	return AttachCookie{cookie}
@@ -384,6 +396,9 @@ type DetachCookie struct {
 // Detach sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func Detach(c *xgb.Conn, Shmseg Seg) DetachCookie {
+	if _, ok := c.Extensions["MIT-SHM"]; !ok {
+		panic("Cannot issue request 'Detach' using the uninitialized extension 'MIT-SHM'. shm.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(detachRequest(c, Shmseg), cookie)
 	return DetachCookie{cookie}
@@ -392,6 +407,9 @@ func Detach(c *xgb.Conn, Shmseg Seg) DetachCookie {
 // DetachChecked sends a checked request.
 // If an error occurs, it can be retrieved using DetachCookie.Check()
 func DetachChecked(c *xgb.Conn, Shmseg Seg) DetachCookie {
+	if _, ok := c.Extensions["MIT-SHM"]; !ok {
+		panic("Cannot issue request 'Detach' using the uninitialized extension 'MIT-SHM'. shm.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(detachRequest(c, Shmseg), cookie)
 	return DetachCookie{cookie}
@@ -433,6 +451,9 @@ type PutImageCookie struct {
 // PutImage sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PutImage(c *xgb.Conn, Drawable xproto.Drawable, Gc xproto.Gcontext, TotalWidth uint16, TotalHeight uint16, SrcX uint16, SrcY uint16, SrcWidth uint16, SrcHeight uint16, DstX int16, DstY int16, Depth byte, Format byte, SendEvent byte, Shmseg Seg, Offset uint32) PutImageCookie {
+	if _, ok := c.Extensions["MIT-SHM"]; !ok {
+		panic("Cannot issue request 'PutImage' using the uninitialized extension 'MIT-SHM'. shm.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(putImageRequest(c, Drawable, Gc, TotalWidth, TotalHeight, SrcX, SrcY, SrcWidth, SrcHeight, DstX, DstY, Depth, Format, SendEvent, Shmseg, Offset), cookie)
 	return PutImageCookie{cookie}
@@ -441,6 +462,9 @@ func PutImage(c *xgb.Conn, Drawable xproto.Drawable, Gc xproto.Gcontext, TotalWi
 // PutImageChecked sends a checked request.
 // If an error occurs, it can be retrieved using PutImageCookie.Check()
 func PutImageChecked(c *xgb.Conn, Drawable xproto.Drawable, Gc xproto.Gcontext, TotalWidth uint16, TotalHeight uint16, SrcX uint16, SrcY uint16, SrcWidth uint16, SrcHeight uint16, DstX int16, DstY int16, Depth byte, Format byte, SendEvent byte, Shmseg Seg, Offset uint32) PutImageCookie {
+	if _, ok := c.Extensions["MIT-SHM"]; !ok {
+		panic("Cannot issue request 'PutImage' using the uninitialized extension 'MIT-SHM'. shm.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(putImageRequest(c, Drawable, Gc, TotalWidth, TotalHeight, SrcX, SrcY, SrcWidth, SrcHeight, DstX, DstY, Depth, Format, SendEvent, Shmseg, Offset), cookie)
 	return PutImageCookie{cookie}
@@ -526,6 +550,9 @@ type GetImageCookie struct {
 // GetImage sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetImageCookie.Reply()
 func GetImage(c *xgb.Conn, Drawable xproto.Drawable, X int16, Y int16, Width uint16, Height uint16, PlaneMask uint32, Format byte, Shmseg Seg, Offset uint32) GetImageCookie {
+	if _, ok := c.Extensions["MIT-SHM"]; !ok {
+		panic("Cannot issue request 'GetImage' using the uninitialized extension 'MIT-SHM'. shm.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getImageRequest(c, Drawable, X, Y, Width, Height, PlaneMask, Format, Shmseg, Offset), cookie)
 	return GetImageCookie{cookie}
@@ -534,6 +561,9 @@ func GetImage(c *xgb.Conn, Drawable xproto.Drawable, X int16, Y int16, Width uin
 // GetImageUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetImageUnchecked(c *xgb.Conn, Drawable xproto.Drawable, X int16, Y int16, Width uint16, Height uint16, PlaneMask uint32, Format byte, Shmseg Seg, Offset uint32) GetImageCookie {
+	if _, ok := c.Extensions["MIT-SHM"]; !ok {
+		panic("Cannot issue request 'GetImage' using the uninitialized extension 'MIT-SHM'. shm.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getImageRequest(c, Drawable, X, Y, Width, Height, PlaneMask, Format, Shmseg, Offset), cookie)
 	return GetImageCookie{cookie}
@@ -639,6 +669,9 @@ type CreatePixmapCookie struct {
 // CreatePixmap sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreatePixmap(c *xgb.Conn, Pid xproto.Pixmap, Drawable xproto.Drawable, Width uint16, Height uint16, Depth byte, Shmseg Seg, Offset uint32) CreatePixmapCookie {
+	if _, ok := c.Extensions["MIT-SHM"]; !ok {
+		panic("Cannot issue request 'CreatePixmap' using the uninitialized extension 'MIT-SHM'. shm.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createPixmapRequest(c, Pid, Drawable, Width, Height, Depth, Shmseg, Offset), cookie)
 	return CreatePixmapCookie{cookie}
@@ -647,6 +680,9 @@ func CreatePixmap(c *xgb.Conn, Pid xproto.Pixmap, Drawable xproto.Drawable, Widt
 // CreatePixmapChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreatePixmapCookie.Check()
 func CreatePixmapChecked(c *xgb.Conn, Pid xproto.Pixmap, Drawable xproto.Drawable, Width uint16, Height uint16, Depth byte, Shmseg Seg, Offset uint32) CreatePixmapCookie {
+	if _, ok := c.Extensions["MIT-SHM"]; !ok {
+		panic("Cannot issue request 'CreatePixmap' using the uninitialized extension 'MIT-SHM'. shm.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createPixmapRequest(c, Pid, Drawable, Width, Height, Depth, Shmseg, Offset), cookie)
 	return CreatePixmapCookie{cookie}
diff --git a/nexgb/sync/sync.go b/nexgb/sync/sync.go
index 1904963..5aa019e 100644
--- a/nexgb/sync/sync.go
+++ b/nexgb/sync/sync.go
@@ -2,7 +2,7 @@
 package sync
 
 /*
-	This file was generated by sync.xml on May 11 2012 1:58:36am EDT.
+	This file was generated by sync.xml on May 11 2012 11:57:19pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -40,6 +40,8 @@ func init() {
 	xgb.NewExtErrorFuncs["SYNC"] = make(map[int]xgb.NewErrorFun)
 }
 
+// Skipping definition for base type 'Float'
+
 // Skipping definition for base type 'Card8'
 
 // Skipping definition for base type 'Int16'
@@ -62,8 +64,6 @@ func init() {
 
 // Skipping definition for base type 'Bool'
 
-// Skipping definition for base type 'Float'
-
 const (
 	AlarmstateActive    = 0
 	AlarmstateInactive  = 1
@@ -750,6 +750,9 @@ type InitializeCookie struct {
 // Initialize sends a checked request.
 // If an error occurs, it will be returned with the reply by calling InitializeCookie.Reply()
 func Initialize(c *xgb.Conn, DesiredMajorVersion byte, DesiredMinorVersion byte) InitializeCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'Initialize' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(initializeRequest(c, DesiredMajorVersion, DesiredMinorVersion), cookie)
 	return InitializeCookie{cookie}
@@ -758,6 +761,9 @@ func Initialize(c *xgb.Conn, DesiredMajorVersion byte, DesiredMinorVersion byte)
 // InitializeUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func InitializeUnchecked(c *xgb.Conn, DesiredMajorVersion byte, DesiredMinorVersion byte) InitializeCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'Initialize' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(initializeRequest(c, DesiredMajorVersion, DesiredMinorVersion), cookie)
 	return InitializeCookie{cookie}
@@ -842,6 +848,9 @@ type ListSystemCountersCookie struct {
 // ListSystemCounters sends a checked request.
 // If an error occurs, it will be returned with the reply by calling ListSystemCountersCookie.Reply()
 func ListSystemCounters(c *xgb.Conn) ListSystemCountersCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'ListSystemCounters' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(listSystemCountersRequest(c), cookie)
 	return ListSystemCountersCookie{cookie}
@@ -850,6 +859,9 @@ func ListSystemCounters(c *xgb.Conn) ListSystemCountersCookie {
 // ListSystemCountersUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ListSystemCountersUnchecked(c *xgb.Conn) ListSystemCountersCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'ListSystemCounters' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(listSystemCountersRequest(c), cookie)
 	return ListSystemCountersCookie{cookie}
@@ -928,6 +940,9 @@ type CreateCounterCookie struct {
 // CreateCounter sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateCounter(c *xgb.Conn, Id Counter, InitialValue Int64) CreateCounterCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'CreateCounter' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createCounterRequest(c, Id, InitialValue), cookie)
 	return CreateCounterCookie{cookie}
@@ -936,6 +951,9 @@ func CreateCounter(c *xgb.Conn, Id Counter, InitialValue Int64) CreateCounterCoo
 // CreateCounterChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreateCounterCookie.Check()
 func CreateCounterChecked(c *xgb.Conn, Id Counter, InitialValue Int64) CreateCounterCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'CreateCounter' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createCounterRequest(c, Id, InitialValue), cookie)
 	return CreateCounterCookie{cookie}
@@ -983,6 +1001,9 @@ type DestroyCounterCookie struct {
 // DestroyCounter sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func DestroyCounter(c *xgb.Conn, Counter Counter) DestroyCounterCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'DestroyCounter' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(destroyCounterRequest(c, Counter), cookie)
 	return DestroyCounterCookie{cookie}
@@ -991,6 +1012,9 @@ func DestroyCounter(c *xgb.Conn, Counter Counter) DestroyCounterCookie {
 // DestroyCounterChecked sends a checked request.
 // If an error occurs, it can be retrieved using DestroyCounterCookie.Check()
 func DestroyCounterChecked(c *xgb.Conn, Counter Counter) DestroyCounterCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'DestroyCounter' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(destroyCounterRequest(c, Counter), cookie)
 	return DestroyCounterCookie{cookie}
@@ -1032,6 +1056,9 @@ type QueryCounterCookie struct {
 // QueryCounter sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryCounterCookie.Reply()
 func QueryCounter(c *xgb.Conn, Counter Counter) QueryCounterCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'QueryCounter' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryCounterRequest(c, Counter), cookie)
 	return QueryCounterCookie{cookie}
@@ -1040,6 +1067,9 @@ func QueryCounter(c *xgb.Conn, Counter Counter) QueryCounterCookie {
 // QueryCounterUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryCounterUnchecked(c *xgb.Conn, Counter Counter) QueryCounterCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'QueryCounter' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryCounterRequest(c, Counter), cookie)
 	return QueryCounterCookie{cookie}
@@ -1114,6 +1144,9 @@ type AwaitCookie struct {
 // Await sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func Await(c *xgb.Conn, WaitList []Waitcondition) AwaitCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'Await' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(awaitRequest(c, WaitList), cookie)
 	return AwaitCookie{cookie}
@@ -1122,6 +1155,9 @@ func Await(c *xgb.Conn, WaitList []Waitcondition) AwaitCookie {
 // AwaitChecked sends a checked request.
 // If an error occurs, it can be retrieved using AwaitCookie.Check()
 func AwaitChecked(c *xgb.Conn, WaitList []Waitcondition) AwaitCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'Await' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(awaitRequest(c, WaitList), cookie)
 	return AwaitCookie{cookie}
@@ -1162,6 +1198,9 @@ type ChangeCounterCookie struct {
 // ChangeCounter sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ChangeCounter(c *xgb.Conn, Counter Counter, Amount Int64) ChangeCounterCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'ChangeCounter' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(changeCounterRequest(c, Counter, Amount), cookie)
 	return ChangeCounterCookie{cookie}
@@ -1170,6 +1209,9 @@ func ChangeCounter(c *xgb.Conn, Counter Counter, Amount Int64) ChangeCounterCook
 // ChangeCounterChecked sends a checked request.
 // If an error occurs, it can be retrieved using ChangeCounterCookie.Check()
 func ChangeCounterChecked(c *xgb.Conn, Counter Counter, Amount Int64) ChangeCounterCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'ChangeCounter' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(changeCounterRequest(c, Counter, Amount), cookie)
 	return ChangeCounterCookie{cookie}
@@ -1217,6 +1259,9 @@ type SetCounterCookie struct {
 // SetCounter sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetCounter(c *xgb.Conn, Counter Counter, Value Int64) SetCounterCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'SetCounter' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setCounterRequest(c, Counter, Value), cookie)
 	return SetCounterCookie{cookie}
@@ -1225,6 +1270,9 @@ func SetCounter(c *xgb.Conn, Counter Counter, Value Int64) SetCounterCookie {
 // SetCounterChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetCounterCookie.Check()
 func SetCounterChecked(c *xgb.Conn, Counter Counter, Value Int64) SetCounterCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'SetCounter' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setCounterRequest(c, Counter, Value), cookie)
 	return SetCounterCookie{cookie}
@@ -1272,6 +1320,9 @@ type CreateAlarmCookie struct {
 // CreateAlarm sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateAlarm(c *xgb.Conn, Id Alarm, ValueMask uint32, ValueList []uint32) CreateAlarmCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'CreateAlarm' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createAlarmRequest(c, Id, ValueMask, ValueList), cookie)
 	return CreateAlarmCookie{cookie}
@@ -1280,6 +1331,9 @@ func CreateAlarm(c *xgb.Conn, Id Alarm, ValueMask uint32, ValueList []uint32) Cr
 // CreateAlarmChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreateAlarmCookie.Check()
 func CreateAlarmChecked(c *xgb.Conn, Id Alarm, ValueMask uint32, ValueList []uint32) CreateAlarmCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'CreateAlarm' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createAlarmRequest(c, Id, ValueMask, ValueList), cookie)
 	return CreateAlarmCookie{cookie}
@@ -1329,6 +1383,9 @@ type ChangeAlarmCookie struct {
 // ChangeAlarm sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ChangeAlarm(c *xgb.Conn, Id Alarm, ValueMask uint32, ValueList []uint32) ChangeAlarmCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'ChangeAlarm' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(changeAlarmRequest(c, Id, ValueMask, ValueList), cookie)
 	return ChangeAlarmCookie{cookie}
@@ -1337,6 +1394,9 @@ func ChangeAlarm(c *xgb.Conn, Id Alarm, ValueMask uint32, ValueList []uint32) Ch
 // ChangeAlarmChecked sends a checked request.
 // If an error occurs, it can be retrieved using ChangeAlarmCookie.Check()
 func ChangeAlarmChecked(c *xgb.Conn, Id Alarm, ValueMask uint32, ValueList []uint32) ChangeAlarmCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'ChangeAlarm' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(changeAlarmRequest(c, Id, ValueMask, ValueList), cookie)
 	return ChangeAlarmCookie{cookie}
@@ -1386,6 +1446,9 @@ type DestroyAlarmCookie struct {
 // DestroyAlarm sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func DestroyAlarm(c *xgb.Conn, Alarm Alarm) DestroyAlarmCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'DestroyAlarm' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(destroyAlarmRequest(c, Alarm), cookie)
 	return DestroyAlarmCookie{cookie}
@@ -1394,6 +1457,9 @@ func DestroyAlarm(c *xgb.Conn, Alarm Alarm) DestroyAlarmCookie {
 // DestroyAlarmChecked sends a checked request.
 // If an error occurs, it can be retrieved using DestroyAlarmCookie.Check()
 func DestroyAlarmChecked(c *xgb.Conn, Alarm Alarm) DestroyAlarmCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'DestroyAlarm' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(destroyAlarmRequest(c, Alarm), cookie)
 	return DestroyAlarmCookie{cookie}
@@ -1435,6 +1501,9 @@ type QueryAlarmCookie struct {
 // QueryAlarm sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryAlarmCookie.Reply()
 func QueryAlarm(c *xgb.Conn, Alarm Alarm) QueryAlarmCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'QueryAlarm' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryAlarmRequest(c, Alarm), cookie)
 	return QueryAlarmCookie{cookie}
@@ -1443,6 +1512,9 @@ func QueryAlarm(c *xgb.Conn, Alarm Alarm) QueryAlarmCookie {
 // QueryAlarmUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryAlarmUnchecked(c *xgb.Conn, Alarm Alarm) QueryAlarmCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'QueryAlarm' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryAlarmRequest(c, Alarm), cookie)
 	return QueryAlarmCookie{cookie}
@@ -1536,6 +1608,9 @@ type SetPriorityCookie struct {
 // SetPriority sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetPriority(c *xgb.Conn, Id uint32, Priority int32) SetPriorityCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'SetPriority' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setPriorityRequest(c, Id, Priority), cookie)
 	return SetPriorityCookie{cookie}
@@ -1544,6 +1619,9 @@ func SetPriority(c *xgb.Conn, Id uint32, Priority int32) SetPriorityCookie {
 // SetPriorityChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetPriorityCookie.Check()
 func SetPriorityChecked(c *xgb.Conn, Id uint32, Priority int32) SetPriorityCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'SetPriority' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setPriorityRequest(c, Id, Priority), cookie)
 	return SetPriorityCookie{cookie}
@@ -1588,6 +1666,9 @@ type GetPriorityCookie struct {
 // GetPriority sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetPriorityCookie.Reply()
 func GetPriority(c *xgb.Conn, Id uint32) GetPriorityCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'GetPriority' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getPriorityRequest(c, Id), cookie)
 	return GetPriorityCookie{cookie}
@@ -1596,6 +1677,9 @@ func GetPriority(c *xgb.Conn, Id uint32) GetPriorityCookie {
 // GetPriorityUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetPriorityUnchecked(c *xgb.Conn, Id uint32) GetPriorityCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'GetPriority' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getPriorityRequest(c, Id), cookie)
 	return GetPriorityCookie{cookie}
@@ -1670,6 +1754,9 @@ type CreateFenceCookie struct {
 // CreateFence sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateFence(c *xgb.Conn, Drawable xproto.Drawable, Fence Fence, InitiallyTriggered bool) CreateFenceCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'CreateFence' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createFenceRequest(c, Drawable, Fence, InitiallyTriggered), cookie)
 	return CreateFenceCookie{cookie}
@@ -1678,6 +1765,9 @@ func CreateFence(c *xgb.Conn, Drawable xproto.Drawable, Fence Fence, InitiallyTr
 // CreateFenceChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreateFenceCookie.Check()
 func CreateFenceChecked(c *xgb.Conn, Drawable xproto.Drawable, Fence Fence, InitiallyTriggered bool) CreateFenceCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'CreateFence' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createFenceRequest(c, Drawable, Fence, InitiallyTriggered), cookie)
 	return CreateFenceCookie{cookie}
@@ -1729,6 +1819,9 @@ type TriggerFenceCookie struct {
 // TriggerFence sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func TriggerFence(c *xgb.Conn, Fence Fence) TriggerFenceCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'TriggerFence' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(triggerFenceRequest(c, Fence), cookie)
 	return TriggerFenceCookie{cookie}
@@ -1737,6 +1830,9 @@ func TriggerFence(c *xgb.Conn, Fence Fence) TriggerFenceCookie {
 // TriggerFenceChecked sends a checked request.
 // If an error occurs, it can be retrieved using TriggerFenceCookie.Check()
 func TriggerFenceChecked(c *xgb.Conn, Fence Fence) TriggerFenceCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'TriggerFence' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(triggerFenceRequest(c, Fence), cookie)
 	return TriggerFenceCookie{cookie}
@@ -1778,6 +1874,9 @@ type ResetFenceCookie struct {
 // ResetFence sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ResetFence(c *xgb.Conn, Fence Fence) ResetFenceCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'ResetFence' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(resetFenceRequest(c, Fence), cookie)
 	return ResetFenceCookie{cookie}
@@ -1786,6 +1885,9 @@ func ResetFence(c *xgb.Conn, Fence Fence) ResetFenceCookie {
 // ResetFenceChecked sends a checked request.
 // If an error occurs, it can be retrieved using ResetFenceCookie.Check()
 func ResetFenceChecked(c *xgb.Conn, Fence Fence) ResetFenceCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'ResetFence' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(resetFenceRequest(c, Fence), cookie)
 	return ResetFenceCookie{cookie}
@@ -1827,6 +1929,9 @@ type DestroyFenceCookie struct {
 // DestroyFence sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func DestroyFence(c *xgb.Conn, Fence Fence) DestroyFenceCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'DestroyFence' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(destroyFenceRequest(c, Fence), cookie)
 	return DestroyFenceCookie{cookie}
@@ -1835,6 +1940,9 @@ func DestroyFence(c *xgb.Conn, Fence Fence) DestroyFenceCookie {
 // DestroyFenceChecked sends a checked request.
 // If an error occurs, it can be retrieved using DestroyFenceCookie.Check()
 func DestroyFenceChecked(c *xgb.Conn, Fence Fence) DestroyFenceCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'DestroyFence' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(destroyFenceRequest(c, Fence), cookie)
 	return DestroyFenceCookie{cookie}
@@ -1876,6 +1984,9 @@ type QueryFenceCookie struct {
 // QueryFence sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryFenceCookie.Reply()
 func QueryFence(c *xgb.Conn, Fence Fence) QueryFenceCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'QueryFence' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryFenceRequest(c, Fence), cookie)
 	return QueryFenceCookie{cookie}
@@ -1884,6 +1995,9 @@ func QueryFence(c *xgb.Conn, Fence Fence) QueryFenceCookie {
 // QueryFenceUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryFenceUnchecked(c *xgb.Conn, Fence Fence) QueryFenceCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'QueryFence' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryFenceRequest(c, Fence), cookie)
 	return QueryFenceCookie{cookie}
@@ -1965,6 +2079,9 @@ type AwaitFenceCookie struct {
 // AwaitFence sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func AwaitFence(c *xgb.Conn, FenceList []Fence) AwaitFenceCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'AwaitFence' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(awaitFenceRequest(c, FenceList), cookie)
 	return AwaitFenceCookie{cookie}
@@ -1973,6 +2090,9 @@ func AwaitFence(c *xgb.Conn, FenceList []Fence) AwaitFenceCookie {
 // AwaitFenceChecked sends a checked request.
 // If an error occurs, it can be retrieved using AwaitFenceCookie.Check()
 func AwaitFenceChecked(c *xgb.Conn, FenceList []Fence) AwaitFenceCookie {
+	if _, ok := c.Extensions["SYNC"]; !ok {
+		panic("Cannot issue request 'AwaitFence' using the uninitialized extension 'SYNC'. sync.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(awaitFenceRequest(c, FenceList), cookie)
 	return AwaitFenceCookie{cookie}
diff --git a/nexgb/xcmisc/xcmisc.go b/nexgb/xcmisc/xcmisc.go
index 7171969..0a4b4ce 100644
--- a/nexgb/xcmisc/xcmisc.go
+++ b/nexgb/xcmisc/xcmisc.go
@@ -2,7 +2,7 @@
 package xcmisc
 
 /*
-	This file was generated by xc_misc.xml on May 11 2012 1:58:36am EDT.
+	This file was generated by xc_misc.xml on May 11 2012 11:57:19pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -40,18 +40,6 @@ func init() {
 	xgb.NewExtErrorFuncs["XC-MISC"] = make(map[int]xgb.NewErrorFun)
 }
 
-// Skipping definition for base type 'Float'
-
-// Skipping definition for base type 'Card8'
-
-// Skipping definition for base type 'Int16'
-
-// Skipping definition for base type 'Int32'
-
-// Skipping definition for base type 'Void'
-
-// Skipping definition for base type 'Byte'
-
 // Skipping definition for base type 'Int8'
 
 // Skipping definition for base type 'Card16'
@@ -64,6 +52,18 @@ func init() {
 
 // Skipping definition for base type 'Bool'
 
+// Skipping definition for base type 'Float'
+
+// Skipping definition for base type 'Card8'
+
+// Skipping definition for base type 'Int16'
+
+// Skipping definition for base type 'Int32'
+
+// Skipping definition for base type 'Void'
+
+// Skipping definition for base type 'Byte'
+
 // GetVersionCookie is a cookie used only for GetVersion requests.
 type GetVersionCookie struct {
 	*xgb.Cookie
@@ -72,6 +72,9 @@ type GetVersionCookie struct {
 // GetVersion sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetVersionCookie.Reply()
 func GetVersion(c *xgb.Conn, ClientMajorVersion uint16, ClientMinorVersion uint16) GetVersionCookie {
+	if _, ok := c.Extensions["XC-MISC"]; !ok {
+		panic("Cannot issue request 'GetVersion' using the uninitialized extension 'XC-MISC'. xcmisc.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getVersionRequest(c, ClientMajorVersion, ClientMinorVersion), cookie)
 	return GetVersionCookie{cookie}
@@ -80,6 +83,9 @@ func GetVersion(c *xgb.Conn, ClientMajorVersion uint16, ClientMinorVersion uint1
 // GetVersionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetVersionUnchecked(c *xgb.Conn, ClientMajorVersion uint16, ClientMinorVersion uint16) GetVersionCookie {
+	if _, ok := c.Extensions["XC-MISC"]; !ok {
+		panic("Cannot issue request 'GetVersion' using the uninitialized extension 'XC-MISC'. xcmisc.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getVersionRequest(c, ClientMajorVersion, ClientMinorVersion), cookie)
 	return GetVersionCookie{cookie}
@@ -161,6 +167,9 @@ type GetXIDRangeCookie struct {
 // GetXIDRange sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetXIDRangeCookie.Reply()
 func GetXIDRange(c *xgb.Conn) GetXIDRangeCookie {
+	if _, ok := c.Extensions["XC-MISC"]; !ok {
+		panic("Cannot issue request 'GetXIDRange' using the uninitialized extension 'XC-MISC'. xcmisc.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getXIDRangeRequest(c), cookie)
 	return GetXIDRangeCookie{cookie}
@@ -169,6 +178,9 @@ func GetXIDRange(c *xgb.Conn) GetXIDRangeCookie {
 // GetXIDRangeUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetXIDRangeUnchecked(c *xgb.Conn) GetXIDRangeCookie {
+	if _, ok := c.Extensions["XC-MISC"]; !ok {
+		panic("Cannot issue request 'GetXIDRange' using the uninitialized extension 'XC-MISC'. xcmisc.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getXIDRangeRequest(c), cookie)
 	return GetXIDRangeCookie{cookie}
@@ -244,6 +256,9 @@ type GetXIDListCookie struct {
 // GetXIDList sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetXIDListCookie.Reply()
 func GetXIDList(c *xgb.Conn, Count uint32) GetXIDListCookie {
+	if _, ok := c.Extensions["XC-MISC"]; !ok {
+		panic("Cannot issue request 'GetXIDList' using the uninitialized extension 'XC-MISC'. xcmisc.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getXIDListRequest(c, Count), cookie)
 	return GetXIDListCookie{cookie}
@@ -252,6 +267,9 @@ func GetXIDList(c *xgb.Conn, Count uint32) GetXIDListCookie {
 // GetXIDListUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetXIDListUnchecked(c *xgb.Conn, Count uint32) GetXIDListCookie {
+	if _, ok := c.Extensions["XC-MISC"]; !ok {
+		panic("Cannot issue request 'GetXIDList' using the uninitialized extension 'XC-MISC'. xcmisc.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getXIDListRequest(c, Count), cookie)
 	return GetXIDListCookie{cookie}
diff --git a/nexgb/xevie/xevie.go b/nexgb/xevie/xevie.go
index ef02e2c..0628ffd 100644
--- a/nexgb/xevie/xevie.go
+++ b/nexgb/xevie/xevie.go
@@ -2,7 +2,7 @@
 package xevie
 
 /*
-	This file was generated by xevie.xml on May 11 2012 1:58:36am EDT.
+	This file was generated by xevie.xml on May 11 2012 11:57:19pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -122,6 +122,9 @@ type QueryVersionCookie struct {
 // QueryVersion sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryVersionCookie.Reply()
 func QueryVersion(c *xgb.Conn, ClientMajorVersion uint16, ClientMinorVersion uint16) QueryVersionCookie {
+	if _, ok := c.Extensions["XEVIE"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'XEVIE'. xevie.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryVersionRequest(c, ClientMajorVersion, ClientMinorVersion), cookie)
 	return QueryVersionCookie{cookie}
@@ -130,6 +133,9 @@ func QueryVersion(c *xgb.Conn, ClientMajorVersion uint16, ClientMinorVersion uin
 // QueryVersionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryVersionUnchecked(c *xgb.Conn, ClientMajorVersion uint16, ClientMinorVersion uint16) QueryVersionCookie {
+	if _, ok := c.Extensions["XEVIE"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'XEVIE'. xevie.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryVersionRequest(c, ClientMajorVersion, ClientMinorVersion), cookie)
 	return QueryVersionCookie{cookie}
@@ -214,6 +220,9 @@ type StartCookie struct {
 // Start sends a checked request.
 // If an error occurs, it will be returned with the reply by calling StartCookie.Reply()
 func Start(c *xgb.Conn, Screen uint32) StartCookie {
+	if _, ok := c.Extensions["XEVIE"]; !ok {
+		panic("Cannot issue request 'Start' using the uninitialized extension 'XEVIE'. xevie.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(startRequest(c, Screen), cookie)
 	return StartCookie{cookie}
@@ -222,6 +231,9 @@ func Start(c *xgb.Conn, Screen uint32) StartCookie {
 // StartUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func StartUnchecked(c *xgb.Conn, Screen uint32) StartCookie {
+	if _, ok := c.Extensions["XEVIE"]; !ok {
+		panic("Cannot issue request 'Start' using the uninitialized extension 'XEVIE'. xevie.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(startRequest(c, Screen), cookie)
 	return StartCookie{cookie}
@@ -295,6 +307,9 @@ type EndCookie struct {
 // End sends a checked request.
 // If an error occurs, it will be returned with the reply by calling EndCookie.Reply()
 func End(c *xgb.Conn, Cmap uint32) EndCookie {
+	if _, ok := c.Extensions["XEVIE"]; !ok {
+		panic("Cannot issue request 'End' using the uninitialized extension 'XEVIE'. xevie.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(endRequest(c, Cmap), cookie)
 	return EndCookie{cookie}
@@ -303,6 +318,9 @@ func End(c *xgb.Conn, Cmap uint32) EndCookie {
 // EndUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func EndUnchecked(c *xgb.Conn, Cmap uint32) EndCookie {
+	if _, ok := c.Extensions["XEVIE"]; !ok {
+		panic("Cannot issue request 'End' using the uninitialized extension 'XEVIE'. xevie.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(endRequest(c, Cmap), cookie)
 	return EndCookie{cookie}
@@ -376,6 +394,9 @@ type SendCookie struct {
 // Send sends a checked request.
 // If an error occurs, it will be returned with the reply by calling SendCookie.Reply()
 func Send(c *xgb.Conn, Event Event, DataType uint32) SendCookie {
+	if _, ok := c.Extensions["XEVIE"]; !ok {
+		panic("Cannot issue request 'Send' using the uninitialized extension 'XEVIE'. xevie.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(sendRequest(c, Event, DataType), cookie)
 	return SendCookie{cookie}
@@ -384,6 +405,9 @@ func Send(c *xgb.Conn, Event Event, DataType uint32) SendCookie {
 // SendUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SendUnchecked(c *xgb.Conn, Event Event, DataType uint32) SendCookie {
+	if _, ok := c.Extensions["XEVIE"]; !ok {
+		panic("Cannot issue request 'Send' using the uninitialized extension 'XEVIE'. xevie.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(sendRequest(c, Event, DataType), cookie)
 	return SendCookie{cookie}
@@ -465,6 +489,9 @@ type SelectInputCookie struct {
 // SelectInput sends a checked request.
 // If an error occurs, it will be returned with the reply by calling SelectInputCookie.Reply()
 func SelectInput(c *xgb.Conn, EventMask uint32) SelectInputCookie {
+	if _, ok := c.Extensions["XEVIE"]; !ok {
+		panic("Cannot issue request 'SelectInput' using the uninitialized extension 'XEVIE'. xevie.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(selectInputRequest(c, EventMask), cookie)
 	return SelectInputCookie{cookie}
@@ -473,6 +500,9 @@ func SelectInput(c *xgb.Conn, EventMask uint32) SelectInputCookie {
 // SelectInputUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SelectInputUnchecked(c *xgb.Conn, EventMask uint32) SelectInputCookie {
+	if _, ok := c.Extensions["XEVIE"]; !ok {
+		panic("Cannot issue request 'SelectInput' using the uninitialized extension 'XEVIE'. xevie.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(selectInputRequest(c, EventMask), cookie)
 	return SelectInputCookie{cookie}
diff --git a/nexgb/xf86dri/xf86dri.go b/nexgb/xf86dri/xf86dri.go
index 1d7dd72..f0224a5 100644
--- a/nexgb/xf86dri/xf86dri.go
+++ b/nexgb/xf86dri/xf86dri.go
@@ -2,7 +2,7 @@
 package xf86dri
 
 /*
-	This file was generated by xf86dri.xml on May 11 2012 1:58:36am EDT.
+	This file was generated by xf86dri.xml on May 11 2012 11:57:19pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -40,8 +40,6 @@ func init() {
 	xgb.NewExtErrorFuncs["XFree86-DRI"] = make(map[int]xgb.NewErrorFun)
 }
 
-// Skipping definition for base type 'Bool'
-
 // Skipping definition for base type 'Float'
 
 // Skipping definition for base type 'Card8'
@@ -64,6 +62,8 @@ func init() {
 
 // Skipping definition for base type 'Double'
 
+// Skipping definition for base type 'Bool'
+
 type DrmClipRect struct {
 	X1 int16
 	Y1 int16
@@ -140,6 +140,9 @@ type QueryVersionCookie struct {
 // QueryVersion sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryVersionCookie.Reply()
 func QueryVersion(c *xgb.Conn) QueryVersionCookie {
+	if _, ok := c.Extensions["XFREE86-DRI"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'XFree86-DRI'. xf86dri.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryVersionRequest(c), cookie)
 	return QueryVersionCookie{cookie}
@@ -148,6 +151,9 @@ func QueryVersion(c *xgb.Conn) QueryVersionCookie {
 // QueryVersionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryVersionUnchecked(c *xgb.Conn) QueryVersionCookie {
+	if _, ok := c.Extensions["XFREE86-DRI"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'XFree86-DRI'. xf86dri.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryVersionRequest(c), cookie)
 	return QueryVersionCookie{cookie}
@@ -227,6 +233,9 @@ type QueryDirectRenderingCapableCookie struct {
 // QueryDirectRenderingCapable sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryDirectRenderingCapableCookie.Reply()
 func QueryDirectRenderingCapable(c *xgb.Conn, Screen uint32) QueryDirectRenderingCapableCookie {
+	if _, ok := c.Extensions["XFREE86-DRI"]; !ok {
+		panic("Cannot issue request 'QueryDirectRenderingCapable' using the uninitialized extension 'XFree86-DRI'. xf86dri.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryDirectRenderingCapableRequest(c, Screen), cookie)
 	return QueryDirectRenderingCapableCookie{cookie}
@@ -235,6 +244,9 @@ func QueryDirectRenderingCapable(c *xgb.Conn, Screen uint32) QueryDirectRenderin
 // QueryDirectRenderingCapableUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryDirectRenderingCapableUnchecked(c *xgb.Conn, Screen uint32) QueryDirectRenderingCapableCookie {
+	if _, ok := c.Extensions["XFREE86-DRI"]; !ok {
+		panic("Cannot issue request 'QueryDirectRenderingCapable' using the uninitialized extension 'XFree86-DRI'. xf86dri.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryDirectRenderingCapableRequest(c, Screen), cookie)
 	return QueryDirectRenderingCapableCookie{cookie}
@@ -313,6 +325,9 @@ type OpenConnectionCookie struct {
 // OpenConnection sends a checked request.
 // If an error occurs, it will be returned with the reply by calling OpenConnectionCookie.Reply()
 func OpenConnection(c *xgb.Conn, Screen uint32) OpenConnectionCookie {
+	if _, ok := c.Extensions["XFREE86-DRI"]; !ok {
+		panic("Cannot issue request 'OpenConnection' using the uninitialized extension 'XFree86-DRI'. xf86dri.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(openConnectionRequest(c, Screen), cookie)
 	return OpenConnectionCookie{cookie}
@@ -321,6 +336,9 @@ func OpenConnection(c *xgb.Conn, Screen uint32) OpenConnectionCookie {
 // OpenConnectionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func OpenConnectionUnchecked(c *xgb.Conn, Screen uint32) OpenConnectionCookie {
+	if _, ok := c.Extensions["XFREE86-DRI"]; !ok {
+		panic("Cannot issue request 'OpenConnection' using the uninitialized extension 'XFree86-DRI'. xf86dri.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(openConnectionRequest(c, Screen), cookie)
 	return OpenConnectionCookie{cookie}
@@ -414,6 +432,9 @@ type CloseConnectionCookie struct {
 // CloseConnection sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CloseConnection(c *xgb.Conn, Screen uint32) CloseConnectionCookie {
+	if _, ok := c.Extensions["XFREE86-DRI"]; !ok {
+		panic("Cannot issue request 'CloseConnection' using the uninitialized extension 'XFree86-DRI'. xf86dri.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(closeConnectionRequest(c, Screen), cookie)
 	return CloseConnectionCookie{cookie}
@@ -422,6 +443,9 @@ func CloseConnection(c *xgb.Conn, Screen uint32) CloseConnectionCookie {
 // CloseConnectionChecked sends a checked request.
 // If an error occurs, it can be retrieved using CloseConnectionCookie.Check()
 func CloseConnectionChecked(c *xgb.Conn, Screen uint32) CloseConnectionCookie {
+	if _, ok := c.Extensions["XFREE86-DRI"]; !ok {
+		panic("Cannot issue request 'CloseConnection' using the uninitialized extension 'XFree86-DRI'. xf86dri.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(closeConnectionRequest(c, Screen), cookie)
 	return CloseConnectionCookie{cookie}
@@ -463,6 +487,9 @@ type GetClientDriverNameCookie struct {
 // GetClientDriverName sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetClientDriverNameCookie.Reply()
 func GetClientDriverName(c *xgb.Conn, Screen uint32) GetClientDriverNameCookie {
+	if _, ok := c.Extensions["XFREE86-DRI"]; !ok {
+		panic("Cannot issue request 'GetClientDriverName' using the uninitialized extension 'XFree86-DRI'. xf86dri.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getClientDriverNameRequest(c, Screen), cookie)
 	return GetClientDriverNameCookie{cookie}
@@ -471,6 +498,9 @@ func GetClientDriverName(c *xgb.Conn, Screen uint32) GetClientDriverNameCookie {
 // GetClientDriverNameUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetClientDriverNameUnchecked(c *xgb.Conn, Screen uint32) GetClientDriverNameCookie {
+	if _, ok := c.Extensions["XFREE86-DRI"]; !ok {
+		panic("Cannot issue request 'GetClientDriverName' using the uninitialized extension 'XFree86-DRI'. xf86dri.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getClientDriverNameRequest(c, Screen), cookie)
 	return GetClientDriverNameCookie{cookie}
@@ -568,6 +598,9 @@ type CreateContextCookie struct {
 // CreateContext sends a checked request.
 // If an error occurs, it will be returned with the reply by calling CreateContextCookie.Reply()
 func CreateContext(c *xgb.Conn, Screen uint32, Visual uint32, Context uint32) CreateContextCookie {
+	if _, ok := c.Extensions["XFREE86-DRI"]; !ok {
+		panic("Cannot issue request 'CreateContext' using the uninitialized extension 'XFree86-DRI'. xf86dri.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(createContextRequest(c, Screen, Visual, Context), cookie)
 	return CreateContextCookie{cookie}
@@ -576,6 +609,9 @@ func CreateContext(c *xgb.Conn, Screen uint32, Visual uint32, Context uint32) Cr
 // CreateContextUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateContextUnchecked(c *xgb.Conn, Screen uint32, Visual uint32, Context uint32) CreateContextCookie {
+	if _, ok := c.Extensions["XFREE86-DRI"]; !ok {
+		panic("Cannot issue request 'CreateContext' using the uninitialized extension 'XFree86-DRI'. xf86dri.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(createContextRequest(c, Screen, Visual, Context), cookie)
 	return CreateContextCookie{cookie}
@@ -656,6 +692,9 @@ type DestroyContextCookie struct {
 // DestroyContext sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func DestroyContext(c *xgb.Conn, Screen uint32, Context uint32) DestroyContextCookie {
+	if _, ok := c.Extensions["XFREE86-DRI"]; !ok {
+		panic("Cannot issue request 'DestroyContext' using the uninitialized extension 'XFree86-DRI'. xf86dri.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(destroyContextRequest(c, Screen, Context), cookie)
 	return DestroyContextCookie{cookie}
@@ -664,6 +703,9 @@ func DestroyContext(c *xgb.Conn, Screen uint32, Context uint32) DestroyContextCo
 // DestroyContextChecked sends a checked request.
 // If an error occurs, it can be retrieved using DestroyContextCookie.Check()
 func DestroyContextChecked(c *xgb.Conn, Screen uint32, Context uint32) DestroyContextCookie {
+	if _, ok := c.Extensions["XFREE86-DRI"]; !ok {
+		panic("Cannot issue request 'DestroyContext' using the uninitialized extension 'XFree86-DRI'. xf86dri.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(destroyContextRequest(c, Screen, Context), cookie)
 	return DestroyContextCookie{cookie}
@@ -708,6 +750,9 @@ type CreateDrawableCookie struct {
 // CreateDrawable sends a checked request.
 // If an error occurs, it will be returned with the reply by calling CreateDrawableCookie.Reply()
 func CreateDrawable(c *xgb.Conn, Screen uint32, Drawable uint32) CreateDrawableCookie {
+	if _, ok := c.Extensions["XFREE86-DRI"]; !ok {
+		panic("Cannot issue request 'CreateDrawable' using the uninitialized extension 'XFree86-DRI'. xf86dri.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(createDrawableRequest(c, Screen, Drawable), cookie)
 	return CreateDrawableCookie{cookie}
@@ -716,6 +761,9 @@ func CreateDrawable(c *xgb.Conn, Screen uint32, Drawable uint32) CreateDrawableC
 // CreateDrawableUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateDrawableUnchecked(c *xgb.Conn, Screen uint32, Drawable uint32) CreateDrawableCookie {
+	if _, ok := c.Extensions["XFREE86-DRI"]; !ok {
+		panic("Cannot issue request 'CreateDrawable' using the uninitialized extension 'XFree86-DRI'. xf86dri.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(createDrawableRequest(c, Screen, Drawable), cookie)
 	return CreateDrawableCookie{cookie}
@@ -793,6 +841,9 @@ type DestroyDrawableCookie struct {
 // DestroyDrawable sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func DestroyDrawable(c *xgb.Conn, Screen uint32, Drawable uint32) DestroyDrawableCookie {
+	if _, ok := c.Extensions["XFREE86-DRI"]; !ok {
+		panic("Cannot issue request 'DestroyDrawable' using the uninitialized extension 'XFree86-DRI'. xf86dri.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(destroyDrawableRequest(c, Screen, Drawable), cookie)
 	return DestroyDrawableCookie{cookie}
@@ -801,6 +852,9 @@ func DestroyDrawable(c *xgb.Conn, Screen uint32, Drawable uint32) DestroyDrawabl
 // DestroyDrawableChecked sends a checked request.
 // If an error occurs, it can be retrieved using DestroyDrawableCookie.Check()
 func DestroyDrawableChecked(c *xgb.Conn, Screen uint32, Drawable uint32) DestroyDrawableCookie {
+	if _, ok := c.Extensions["XFREE86-DRI"]; !ok {
+		panic("Cannot issue request 'DestroyDrawable' using the uninitialized extension 'XFree86-DRI'. xf86dri.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(destroyDrawableRequest(c, Screen, Drawable), cookie)
 	return DestroyDrawableCookie{cookie}
@@ -845,6 +899,9 @@ type GetDrawableInfoCookie struct {
 // GetDrawableInfo sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetDrawableInfoCookie.Reply()
 func GetDrawableInfo(c *xgb.Conn, Screen uint32, Drawable uint32) GetDrawableInfoCookie {
+	if _, ok := c.Extensions["XFREE86-DRI"]; !ok {
+		panic("Cannot issue request 'GetDrawableInfo' using the uninitialized extension 'XFree86-DRI'. xf86dri.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getDrawableInfoRequest(c, Screen, Drawable), cookie)
 	return GetDrawableInfoCookie{cookie}
@@ -853,6 +910,9 @@ func GetDrawableInfo(c *xgb.Conn, Screen uint32, Drawable uint32) GetDrawableInf
 // GetDrawableInfoUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetDrawableInfoUnchecked(c *xgb.Conn, Screen uint32, Drawable uint32) GetDrawableInfoCookie {
+	if _, ok := c.Extensions["XFREE86-DRI"]; !ok {
+		panic("Cannot issue request 'GetDrawableInfo' using the uninitialized extension 'XFree86-DRI'. xf86dri.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getDrawableInfoRequest(c, Screen, Drawable), cookie)
 	return GetDrawableInfoCookie{cookie}
@@ -974,6 +1034,9 @@ type GetDeviceInfoCookie struct {
 // GetDeviceInfo sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetDeviceInfoCookie.Reply()
 func GetDeviceInfo(c *xgb.Conn, Screen uint32) GetDeviceInfoCookie {
+	if _, ok := c.Extensions["XFREE86-DRI"]; !ok {
+		panic("Cannot issue request 'GetDeviceInfo' using the uninitialized extension 'XFree86-DRI'. xf86dri.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getDeviceInfoRequest(c, Screen), cookie)
 	return GetDeviceInfoCookie{cookie}
@@ -982,6 +1045,9 @@ func GetDeviceInfo(c *xgb.Conn, Screen uint32) GetDeviceInfoCookie {
 // GetDeviceInfoUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetDeviceInfoUnchecked(c *xgb.Conn, Screen uint32) GetDeviceInfoCookie {
+	if _, ok := c.Extensions["XFREE86-DRI"]; !ok {
+		panic("Cannot issue request 'GetDeviceInfo' using the uninitialized extension 'XFree86-DRI'. xf86dri.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getDeviceInfoRequest(c, Screen), cookie)
 	return GetDeviceInfoCookie{cookie}
@@ -1084,6 +1150,9 @@ type AuthConnectionCookie struct {
 // AuthConnection sends a checked request.
 // If an error occurs, it will be returned with the reply by calling AuthConnectionCookie.Reply()
 func AuthConnection(c *xgb.Conn, Screen uint32, Magic uint32) AuthConnectionCookie {
+	if _, ok := c.Extensions["XFREE86-DRI"]; !ok {
+		panic("Cannot issue request 'AuthConnection' using the uninitialized extension 'XFree86-DRI'. xf86dri.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(authConnectionRequest(c, Screen, Magic), cookie)
 	return AuthConnectionCookie{cookie}
@@ -1092,6 +1161,9 @@ func AuthConnection(c *xgb.Conn, Screen uint32, Magic uint32) AuthConnectionCook
 // AuthConnectionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func AuthConnectionUnchecked(c *xgb.Conn, Screen uint32, Magic uint32) AuthConnectionCookie {
+	if _, ok := c.Extensions["XFREE86-DRI"]; !ok {
+		panic("Cannot issue request 'AuthConnection' using the uninitialized extension 'XFree86-DRI'. xf86dri.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(authConnectionRequest(c, Screen, Magic), cookie)
 	return AuthConnectionCookie{cookie}
diff --git a/nexgb/xf86vidmode/xf86vidmode.go b/nexgb/xf86vidmode/xf86vidmode.go
index 01f271c..be41acd 100644
--- a/nexgb/xf86vidmode/xf86vidmode.go
+++ b/nexgb/xf86vidmode/xf86vidmode.go
@@ -2,7 +2,7 @@
 package xf86vidmode
 
 /*
-	This file was generated by xf86vidmode.xml on May 11 2012 1:58:36am EDT.
+	This file was generated by xf86vidmode.xml on May 11 2012 11:57:19pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -40,18 +40,6 @@ func init() {
 	xgb.NewExtErrorFuncs["XFree86-VidModeExtension"] = make(map[int]xgb.NewErrorFun)
 }
 
-// Skipping definition for base type 'Float'
-
-// Skipping definition for base type 'Card8'
-
-// Skipping definition for base type 'Int16'
-
-// Skipping definition for base type 'Int32'
-
-// Skipping definition for base type 'Void'
-
-// Skipping definition for base type 'Byte'
-
 // Skipping definition for base type 'Int8'
 
 // Skipping definition for base type 'Card16'
@@ -64,6 +52,18 @@ func init() {
 
 // Skipping definition for base type 'Bool'
 
+// Skipping definition for base type 'Float'
+
+// Skipping definition for base type 'Card8'
+
+// Skipping definition for base type 'Int16'
+
+// Skipping definition for base type 'Int32'
+
+// Skipping definition for base type 'Void'
+
+// Skipping definition for base type 'Byte'
+
 const (
 	ModeFlagPositiveHsync = 1
 	ModeFlagNegativeHsync = 2
@@ -557,6 +557,9 @@ type QueryVersionCookie struct {
 // QueryVersion sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryVersionCookie.Reply()
 func QueryVersion(c *xgb.Conn) QueryVersionCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryVersionRequest(c), cookie)
 	return QueryVersionCookie{cookie}
@@ -565,6 +568,9 @@ func QueryVersion(c *xgb.Conn) QueryVersionCookie {
 // QueryVersionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryVersionUnchecked(c *xgb.Conn) QueryVersionCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryVersionRequest(c), cookie)
 	return QueryVersionCookie{cookie}
@@ -640,6 +646,9 @@ type GetModeLineCookie struct {
 // GetModeLine sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetModeLineCookie.Reply()
 func GetModeLine(c *xgb.Conn, Screen uint16) GetModeLineCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetModeLine' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getModeLineRequest(c, Screen), cookie)
 	return GetModeLineCookie{cookie}
@@ -648,6 +657,9 @@ func GetModeLine(c *xgb.Conn, Screen uint16) GetModeLineCookie {
 // GetModeLineUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetModeLineUnchecked(c *xgb.Conn, Screen uint16) GetModeLineCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetModeLine' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getModeLineRequest(c, Screen), cookie)
 	return GetModeLineCookie{cookie}
@@ -779,6 +791,9 @@ type ModModeLineCookie struct {
 // ModModeLine sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ModModeLine(c *xgb.Conn, Screen uint32, Hdisplay uint16, Hsyncstart uint16, Hsyncend uint16, Htotal uint16, Hskew uint16, Vdisplay uint16, Vsyncstart uint16, Vsyncend uint16, Vtotal uint16, Flags uint32, Privsize uint32, Private []byte) ModModeLineCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'ModModeLine' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(modModeLineRequest(c, Screen, Hdisplay, Hsyncstart, Hsyncend, Htotal, Hskew, Vdisplay, Vsyncstart, Vsyncend, Vtotal, Flags, Privsize, Private), cookie)
 	return ModModeLineCookie{cookie}
@@ -787,6 +802,9 @@ func ModModeLine(c *xgb.Conn, Screen uint32, Hdisplay uint16, Hsyncstart uint16,
 // ModModeLineChecked sends a checked request.
 // If an error occurs, it can be retrieved using ModModeLineCookie.Check()
 func ModModeLineChecked(c *xgb.Conn, Screen uint32, Hdisplay uint16, Hsyncstart uint16, Hsyncend uint16, Htotal uint16, Hskew uint16, Vdisplay uint16, Vsyncstart uint16, Vsyncend uint16, Vtotal uint16, Flags uint32, Privsize uint32, Private []byte) ModModeLineCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'ModModeLine' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(modModeLineRequest(c, Screen, Hdisplay, Hsyncstart, Hsyncend, Htotal, Hskew, Vdisplay, Vsyncstart, Vsyncend, Vtotal, Flags, Privsize, Private), cookie)
 	return ModModeLineCookie{cookie}
@@ -868,6 +886,9 @@ type SwitchModeCookie struct {
 // SwitchMode sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SwitchMode(c *xgb.Conn, Screen uint16, Zoom uint16) SwitchModeCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'SwitchMode' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(switchModeRequest(c, Screen, Zoom), cookie)
 	return SwitchModeCookie{cookie}
@@ -876,6 +897,9 @@ func SwitchMode(c *xgb.Conn, Screen uint16, Zoom uint16) SwitchModeCookie {
 // SwitchModeChecked sends a checked request.
 // If an error occurs, it can be retrieved using SwitchModeCookie.Check()
 func SwitchModeChecked(c *xgb.Conn, Screen uint16, Zoom uint16) SwitchModeCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'SwitchMode' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(switchModeRequest(c, Screen, Zoom), cookie)
 	return SwitchModeCookie{cookie}
@@ -920,6 +944,9 @@ type GetMonitorCookie struct {
 // GetMonitor sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetMonitorCookie.Reply()
 func GetMonitor(c *xgb.Conn, Screen uint16) GetMonitorCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetMonitor' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getMonitorRequest(c, Screen), cookie)
 	return GetMonitorCookie{cookie}
@@ -928,6 +955,9 @@ func GetMonitor(c *xgb.Conn, Screen uint16) GetMonitorCookie {
 // GetMonitorUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetMonitorUnchecked(c *xgb.Conn, Screen uint16) GetMonitorCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetMonitor' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getMonitorRequest(c, Screen), cookie)
 	return GetMonitorCookie{cookie}
@@ -1056,6 +1086,9 @@ type LockModeSwitchCookie struct {
 // LockModeSwitch sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func LockModeSwitch(c *xgb.Conn, Screen uint16, Lock uint16) LockModeSwitchCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'LockModeSwitch' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(lockModeSwitchRequest(c, Screen, Lock), cookie)
 	return LockModeSwitchCookie{cookie}
@@ -1064,6 +1097,9 @@ func LockModeSwitch(c *xgb.Conn, Screen uint16, Lock uint16) LockModeSwitchCooki
 // LockModeSwitchChecked sends a checked request.
 // If an error occurs, it can be retrieved using LockModeSwitchCookie.Check()
 func LockModeSwitchChecked(c *xgb.Conn, Screen uint16, Lock uint16) LockModeSwitchCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'LockModeSwitch' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(lockModeSwitchRequest(c, Screen, Lock), cookie)
 	return LockModeSwitchCookie{cookie}
@@ -1108,6 +1144,9 @@ type GetAllModeLinesCookie struct {
 // GetAllModeLines sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetAllModeLinesCookie.Reply()
 func GetAllModeLines(c *xgb.Conn, Screen uint16) GetAllModeLinesCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetAllModeLines' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getAllModeLinesRequest(c, Screen), cookie)
 	return GetAllModeLinesCookie{cookie}
@@ -1116,6 +1155,9 @@ func GetAllModeLines(c *xgb.Conn, Screen uint16) GetAllModeLinesCookie {
 // GetAllModeLinesUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetAllModeLinesUnchecked(c *xgb.Conn, Screen uint16) GetAllModeLinesCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetAllModeLines' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getAllModeLinesRequest(c, Screen), cookie)
 	return GetAllModeLinesCookie{cookie}
@@ -1199,6 +1241,9 @@ type AddModeLineCookie struct {
 // AddModeLine sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func AddModeLine(c *xgb.Conn, Screen uint32, Dotclock Dotclock, Hdisplay uint16, Hsyncstart uint16, Hsyncend uint16, Htotal uint16, Hskew uint16, Vdisplay uint16, Vsyncstart uint16, Vsyncend uint16, Vtotal uint16, Flags uint32, Privsize uint32, AfterDotclock Dotclock, AfterHdisplay uint16, AfterHsyncstart uint16, AfterHsyncend uint16, AfterHtotal uint16, AfterHskew uint16, AfterVdisplay uint16, AfterVsyncstart uint16, AfterVsyncend uint16, AfterVtotal uint16, AfterFlags uint32, Private []byte) AddModeLineCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'AddModeLine' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(addModeLineRequest(c, Screen, Dotclock, Hdisplay, Hsyncstart, Hsyncend, Htotal, Hskew, Vdisplay, Vsyncstart, Vsyncend, Vtotal, Flags, Privsize, AfterDotclock, AfterHdisplay, AfterHsyncstart, AfterHsyncend, AfterHtotal, AfterHskew, AfterVdisplay, AfterVsyncstart, AfterVsyncend, AfterVtotal, AfterFlags, Private), cookie)
 	return AddModeLineCookie{cookie}
@@ -1207,6 +1252,9 @@ func AddModeLine(c *xgb.Conn, Screen uint32, Dotclock Dotclock, Hdisplay uint16,
 // AddModeLineChecked sends a checked request.
 // If an error occurs, it can be retrieved using AddModeLineCookie.Check()
 func AddModeLineChecked(c *xgb.Conn, Screen uint32, Dotclock Dotclock, Hdisplay uint16, Hsyncstart uint16, Hsyncend uint16, Htotal uint16, Hskew uint16, Vdisplay uint16, Vsyncstart uint16, Vsyncend uint16, Vtotal uint16, Flags uint32, Privsize uint32, AfterDotclock Dotclock, AfterHdisplay uint16, AfterHsyncstart uint16, AfterHsyncend uint16, AfterHtotal uint16, AfterHskew uint16, AfterVdisplay uint16, AfterVsyncstart uint16, AfterVsyncend uint16, AfterVtotal uint16, AfterFlags uint32, Private []byte) AddModeLineCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'AddModeLine' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(addModeLineRequest(c, Screen, Dotclock, Hdisplay, Hsyncstart, Hsyncend, Htotal, Hskew, Vdisplay, Vsyncstart, Vsyncend, Vtotal, Flags, Privsize, AfterDotclock, AfterHdisplay, AfterHsyncstart, AfterHsyncend, AfterHtotal, AfterHskew, AfterVdisplay, AfterVsyncstart, AfterVsyncend, AfterVtotal, AfterFlags, Private), cookie)
 	return AddModeLineCookie{cookie}
@@ -1328,6 +1376,9 @@ type DeleteModeLineCookie struct {
 // DeleteModeLine sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func DeleteModeLine(c *xgb.Conn, Screen uint32, Dotclock Dotclock, Hdisplay uint16, Hsyncstart uint16, Hsyncend uint16, Htotal uint16, Hskew uint16, Vdisplay uint16, Vsyncstart uint16, Vsyncend uint16, Vtotal uint16, Flags uint32, Privsize uint32, Private []byte) DeleteModeLineCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'DeleteModeLine' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(deleteModeLineRequest(c, Screen, Dotclock, Hdisplay, Hsyncstart, Hsyncend, Htotal, Hskew, Vdisplay, Vsyncstart, Vsyncend, Vtotal, Flags, Privsize, Private), cookie)
 	return DeleteModeLineCookie{cookie}
@@ -1336,6 +1387,9 @@ func DeleteModeLine(c *xgb.Conn, Screen uint32, Dotclock Dotclock, Hdisplay uint
 // DeleteModeLineChecked sends a checked request.
 // If an error occurs, it can be retrieved using DeleteModeLineCookie.Check()
 func DeleteModeLineChecked(c *xgb.Conn, Screen uint32, Dotclock Dotclock, Hdisplay uint16, Hsyncstart uint16, Hsyncend uint16, Htotal uint16, Hskew uint16, Vdisplay uint16, Vsyncstart uint16, Vsyncend uint16, Vtotal uint16, Flags uint32, Privsize uint32, Private []byte) DeleteModeLineCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'DeleteModeLine' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(deleteModeLineRequest(c, Screen, Dotclock, Hdisplay, Hsyncstart, Hsyncend, Htotal, Hskew, Vdisplay, Vsyncstart, Vsyncend, Vtotal, Flags, Privsize, Private), cookie)
 	return DeleteModeLineCookie{cookie}
@@ -1420,6 +1474,9 @@ type ValidateModeLineCookie struct {
 // ValidateModeLine sends a checked request.
 // If an error occurs, it will be returned with the reply by calling ValidateModeLineCookie.Reply()
 func ValidateModeLine(c *xgb.Conn, Screen uint32, Dotclock Dotclock, Hdisplay uint16, Hsyncstart uint16, Hsyncend uint16, Htotal uint16, Hskew uint16, Vdisplay uint16, Vsyncstart uint16, Vsyncend uint16, Vtotal uint16, Flags uint32, Privsize uint32, Private []byte) ValidateModeLineCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'ValidateModeLine' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(validateModeLineRequest(c, Screen, Dotclock, Hdisplay, Hsyncstart, Hsyncend, Htotal, Hskew, Vdisplay, Vsyncstart, Vsyncend, Vtotal, Flags, Privsize, Private), cookie)
 	return ValidateModeLineCookie{cookie}
@@ -1428,6 +1485,9 @@ func ValidateModeLine(c *xgb.Conn, Screen uint32, Dotclock Dotclock, Hdisplay ui
 // ValidateModeLineUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ValidateModeLineUnchecked(c *xgb.Conn, Screen uint32, Dotclock Dotclock, Hdisplay uint16, Hsyncstart uint16, Hsyncend uint16, Htotal uint16, Hskew uint16, Vdisplay uint16, Vsyncstart uint16, Vsyncend uint16, Vtotal uint16, Flags uint32, Privsize uint32, Private []byte) ValidateModeLineCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'ValidateModeLine' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(validateModeLineRequest(c, Screen, Dotclock, Hdisplay, Hsyncstart, Hsyncend, Htotal, Hskew, Vdisplay, Vsyncstart, Vsyncend, Vtotal, Flags, Privsize, Private), cookie)
 	return ValidateModeLineCookie{cookie}
@@ -1548,6 +1608,9 @@ type SwitchToModeCookie struct {
 // SwitchToMode sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SwitchToMode(c *xgb.Conn, Screen uint32, Dotclock Dotclock, Hdisplay uint16, Hsyncstart uint16, Hsyncend uint16, Htotal uint16, Hskew uint16, Vdisplay uint16, Vsyncstart uint16, Vsyncend uint16, Vtotal uint16, Flags uint32, Privsize uint32, Private []byte) SwitchToModeCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'SwitchToMode' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(switchToModeRequest(c, Screen, Dotclock, Hdisplay, Hsyncstart, Hsyncend, Htotal, Hskew, Vdisplay, Vsyncstart, Vsyncend, Vtotal, Flags, Privsize, Private), cookie)
 	return SwitchToModeCookie{cookie}
@@ -1556,6 +1619,9 @@ func SwitchToMode(c *xgb.Conn, Screen uint32, Dotclock Dotclock, Hdisplay uint16
 // SwitchToModeChecked sends a checked request.
 // If an error occurs, it can be retrieved using SwitchToModeCookie.Check()
 func SwitchToModeChecked(c *xgb.Conn, Screen uint32, Dotclock Dotclock, Hdisplay uint16, Hsyncstart uint16, Hsyncend uint16, Htotal uint16, Hskew uint16, Vdisplay uint16, Vsyncstart uint16, Vsyncend uint16, Vtotal uint16, Flags uint32, Privsize uint32, Private []byte) SwitchToModeCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'SwitchToMode' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(switchToModeRequest(c, Screen, Dotclock, Hdisplay, Hsyncstart, Hsyncend, Htotal, Hskew, Vdisplay, Vsyncstart, Vsyncend, Vtotal, Flags, Privsize, Private), cookie)
 	return SwitchToModeCookie{cookie}
@@ -1640,6 +1706,9 @@ type GetViewPortCookie struct {
 // GetViewPort sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetViewPortCookie.Reply()
 func GetViewPort(c *xgb.Conn, Screen uint16) GetViewPortCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetViewPort' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getViewPortRequest(c, Screen), cookie)
 	return GetViewPortCookie{cookie}
@@ -1648,6 +1717,9 @@ func GetViewPort(c *xgb.Conn, Screen uint16) GetViewPortCookie {
 // GetViewPortUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetViewPortUnchecked(c *xgb.Conn, Screen uint16) GetViewPortCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetViewPort' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getViewPortRequest(c, Screen), cookie)
 	return GetViewPortCookie{cookie}
@@ -1731,6 +1803,9 @@ type SetViewPortCookie struct {
 // SetViewPort sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetViewPort(c *xgb.Conn, Screen uint16, X uint32, Y uint32) SetViewPortCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'SetViewPort' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setViewPortRequest(c, Screen, X, Y), cookie)
 	return SetViewPortCookie{cookie}
@@ -1739,6 +1814,9 @@ func SetViewPort(c *xgb.Conn, Screen uint16, X uint32, Y uint32) SetViewPortCook
 // SetViewPortChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetViewPortCookie.Check()
 func SetViewPortChecked(c *xgb.Conn, Screen uint16, X uint32, Y uint32) SetViewPortCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'SetViewPort' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setViewPortRequest(c, Screen, X, Y), cookie)
 	return SetViewPortCookie{cookie}
@@ -1788,6 +1866,9 @@ type GetDotClocksCookie struct {
 // GetDotClocks sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetDotClocksCookie.Reply()
 func GetDotClocks(c *xgb.Conn, Screen uint16) GetDotClocksCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetDotClocks' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getDotClocksRequest(c, Screen), cookie)
 	return GetDotClocksCookie{cookie}
@@ -1796,6 +1877,9 @@ func GetDotClocks(c *xgb.Conn, Screen uint16) GetDotClocksCookie {
 // GetDotClocksUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetDotClocksUnchecked(c *xgb.Conn, Screen uint16) GetDotClocksCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetDotClocks' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getDotClocksRequest(c, Screen), cookie)
 	return GetDotClocksCookie{cookie}
@@ -1891,6 +1975,9 @@ type SetClientVersionCookie struct {
 // SetClientVersion sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetClientVersion(c *xgb.Conn, Major uint16, Minor uint16) SetClientVersionCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'SetClientVersion' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setClientVersionRequest(c, Major, Minor), cookie)
 	return SetClientVersionCookie{cookie}
@@ -1899,6 +1986,9 @@ func SetClientVersion(c *xgb.Conn, Major uint16, Minor uint16) SetClientVersionC
 // SetClientVersionChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetClientVersionCookie.Check()
 func SetClientVersionChecked(c *xgb.Conn, Major uint16, Minor uint16) SetClientVersionCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'SetClientVersion' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setClientVersionRequest(c, Major, Minor), cookie)
 	return SetClientVersionCookie{cookie}
@@ -1943,6 +2033,9 @@ type SetGammaCookie struct {
 // SetGamma sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetGamma(c *xgb.Conn, Screen uint16, Red uint32, Green uint32, Blue uint32) SetGammaCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'SetGamma' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setGammaRequest(c, Screen, Red, Green, Blue), cookie)
 	return SetGammaCookie{cookie}
@@ -1951,6 +2044,9 @@ func SetGamma(c *xgb.Conn, Screen uint16, Red uint32, Green uint32, Blue uint32)
 // SetGammaChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetGammaCookie.Check()
 func SetGammaChecked(c *xgb.Conn, Screen uint16, Red uint32, Green uint32, Blue uint32) SetGammaCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'SetGamma' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setGammaRequest(c, Screen, Red, Green, Blue), cookie)
 	return SetGammaCookie{cookie}
@@ -2005,6 +2101,9 @@ type GetGammaCookie struct {
 // GetGamma sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetGammaCookie.Reply()
 func GetGamma(c *xgb.Conn, Screen uint16) GetGammaCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetGamma' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getGammaRequest(c, Screen), cookie)
 	return GetGammaCookie{cookie}
@@ -2013,6 +2112,9 @@ func GetGamma(c *xgb.Conn, Screen uint16) GetGammaCookie {
 // GetGammaUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetGammaUnchecked(c *xgb.Conn, Screen uint16) GetGammaCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetGamma' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getGammaRequest(c, Screen), cookie)
 	return GetGammaCookie{cookie}
@@ -2100,6 +2202,9 @@ type GetGammaRampCookie struct {
 // GetGammaRamp sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetGammaRampCookie.Reply()
 func GetGammaRamp(c *xgb.Conn, Screen uint16, Size uint16) GetGammaRampCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetGammaRamp' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getGammaRampRequest(c, Screen, Size), cookie)
 	return GetGammaRampCookie{cookie}
@@ -2108,6 +2213,9 @@ func GetGammaRamp(c *xgb.Conn, Screen uint16, Size uint16) GetGammaRampCookie {
 // GetGammaRampUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetGammaRampUnchecked(c *xgb.Conn, Screen uint16, Size uint16) GetGammaRampCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetGammaRamp' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getGammaRampRequest(c, Screen, Size), cookie)
 	return GetGammaRampCookie{cookie}
@@ -2212,6 +2320,9 @@ type SetGammaRampCookie struct {
 // SetGammaRamp sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetGammaRamp(c *xgb.Conn, Screen uint16, Size uint16, Red []uint16, Green []uint16, Blue []uint16) SetGammaRampCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'SetGammaRamp' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setGammaRampRequest(c, Screen, Size, Red, Green, Blue), cookie)
 	return SetGammaRampCookie{cookie}
@@ -2220,6 +2331,9 @@ func SetGammaRamp(c *xgb.Conn, Screen uint16, Size uint16, Red []uint16, Green [
 // SetGammaRampChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetGammaRampCookie.Check()
 func SetGammaRampChecked(c *xgb.Conn, Screen uint16, Size uint16, Red []uint16, Green []uint16, Blue []uint16) SetGammaRampCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'SetGammaRamp' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setGammaRampRequest(c, Screen, Size, Red, Green, Blue), cookie)
 	return SetGammaRampCookie{cookie}
@@ -2282,6 +2396,9 @@ type GetGammaRampSizeCookie struct {
 // GetGammaRampSize sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetGammaRampSizeCookie.Reply()
 func GetGammaRampSize(c *xgb.Conn, Screen uint16) GetGammaRampSizeCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetGammaRampSize' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getGammaRampSizeRequest(c, Screen), cookie)
 	return GetGammaRampSizeCookie{cookie}
@@ -2290,6 +2407,9 @@ func GetGammaRampSize(c *xgb.Conn, Screen uint16) GetGammaRampSizeCookie {
 // GetGammaRampSizeUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetGammaRampSizeUnchecked(c *xgb.Conn, Screen uint16) GetGammaRampSizeCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetGammaRampSize' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getGammaRampSizeRequest(c, Screen), cookie)
 	return GetGammaRampSizeCookie{cookie}
@@ -2369,6 +2489,9 @@ type GetPermissionsCookie struct {
 // GetPermissions sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetPermissionsCookie.Reply()
 func GetPermissions(c *xgb.Conn, Screen uint16) GetPermissionsCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetPermissions' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getPermissionsRequest(c, Screen), cookie)
 	return GetPermissionsCookie{cookie}
@@ -2377,6 +2500,9 @@ func GetPermissions(c *xgb.Conn, Screen uint16) GetPermissionsCookie {
 // GetPermissionsUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetPermissionsUnchecked(c *xgb.Conn, Screen uint16) GetPermissionsCookie {
+	if _, ok := c.Extensions["XFREE86-VIDMODEEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetPermissions' using the uninitialized extension 'XFree86-VidModeExtension'. xf86vidmode.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getPermissionsRequest(c, Screen), cookie)
 	return GetPermissionsCookie{cookie}
diff --git a/nexgb/xfixes/xfixes.go b/nexgb/xfixes/xfixes.go
index 67dff6a..08cb596 100644
--- a/nexgb/xfixes/xfixes.go
+++ b/nexgb/xfixes/xfixes.go
@@ -2,7 +2,7 @@
 package xfixes
 
 /*
-	This file was generated by xfixes.xml on May 11 2012 1:58:36am EDT.
+	This file was generated by xfixes.xml on May 11 2012 11:57:20pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -42,14 +42,6 @@ func init() {
 	xgb.NewExtErrorFuncs["XFIXES"] = make(map[int]xgb.NewErrorFun)
 }
 
-// Skipping definition for base type 'Int16'
-
-// Skipping definition for base type 'Int32'
-
-// Skipping definition for base type 'Void'
-
-// Skipping definition for base type 'Byte'
-
 // Skipping definition for base type 'Int8'
 
 // Skipping definition for base type 'Card16'
@@ -66,6 +58,14 @@ func init() {
 
 // Skipping definition for base type 'Card8'
 
+// Skipping definition for base type 'Int16'
+
+// Skipping definition for base type 'Int32'
+
+// Skipping definition for base type 'Void'
+
+// Skipping definition for base type 'Byte'
+
 const (
 	SaveSetModeInsert = 0
 	SaveSetModeDelete = 1
@@ -367,6 +367,9 @@ type QueryVersionCookie struct {
 // QueryVersion sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryVersionCookie.Reply()
 func QueryVersion(c *xgb.Conn, ClientMajorVersion uint32, ClientMinorVersion uint32) QueryVersionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryVersionRequest(c, ClientMajorVersion, ClientMinorVersion), cookie)
 	return QueryVersionCookie{cookie}
@@ -375,6 +378,9 @@ func QueryVersion(c *xgb.Conn, ClientMajorVersion uint32, ClientMinorVersion uin
 // QueryVersionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryVersionUnchecked(c *xgb.Conn, ClientMajorVersion uint32, ClientMinorVersion uint32) QueryVersionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryVersionRequest(c, ClientMajorVersion, ClientMinorVersion), cookie)
 	return QueryVersionCookie{cookie}
@@ -459,6 +465,9 @@ type ChangeSaveSetCookie struct {
 // ChangeSaveSet sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ChangeSaveSet(c *xgb.Conn, Mode byte, Target byte, Map byte, Window xproto.Window) ChangeSaveSetCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'ChangeSaveSet' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(changeSaveSetRequest(c, Mode, Target, Map, Window), cookie)
 	return ChangeSaveSetCookie{cookie}
@@ -467,6 +476,9 @@ func ChangeSaveSet(c *xgb.Conn, Mode byte, Target byte, Map byte, Window xproto.
 // ChangeSaveSetChecked sends a checked request.
 // If an error occurs, it can be retrieved using ChangeSaveSetCookie.Check()
 func ChangeSaveSetChecked(c *xgb.Conn, Mode byte, Target byte, Map byte, Window xproto.Window) ChangeSaveSetCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'ChangeSaveSet' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(changeSaveSetRequest(c, Mode, Target, Map, Window), cookie)
 	return ChangeSaveSetCookie{cookie}
@@ -519,6 +531,9 @@ type SelectSelectionInputCookie struct {
 // SelectSelectionInput sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SelectSelectionInput(c *xgb.Conn, Window xproto.Window, Selection xproto.Atom, EventMask uint32) SelectSelectionInputCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'SelectSelectionInput' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(selectSelectionInputRequest(c, Window, Selection, EventMask), cookie)
 	return SelectSelectionInputCookie{cookie}
@@ -527,6 +542,9 @@ func SelectSelectionInput(c *xgb.Conn, Window xproto.Window, Selection xproto.At
 // SelectSelectionInputChecked sends a checked request.
 // If an error occurs, it can be retrieved using SelectSelectionInputCookie.Check()
 func SelectSelectionInputChecked(c *xgb.Conn, Window xproto.Window, Selection xproto.Atom, EventMask uint32) SelectSelectionInputCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'SelectSelectionInput' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(selectSelectionInputRequest(c, Window, Selection, EventMask), cookie)
 	return SelectSelectionInputCookie{cookie}
@@ -574,6 +592,9 @@ type SelectCursorInputCookie struct {
 // SelectCursorInput sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SelectCursorInput(c *xgb.Conn, Window xproto.Window, EventMask uint32) SelectCursorInputCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'SelectCursorInput' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(selectCursorInputRequest(c, Window, EventMask), cookie)
 	return SelectCursorInputCookie{cookie}
@@ -582,6 +603,9 @@ func SelectCursorInput(c *xgb.Conn, Window xproto.Window, EventMask uint32) Sele
 // SelectCursorInputChecked sends a checked request.
 // If an error occurs, it can be retrieved using SelectCursorInputCookie.Check()
 func SelectCursorInputChecked(c *xgb.Conn, Window xproto.Window, EventMask uint32) SelectCursorInputCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'SelectCursorInput' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(selectCursorInputRequest(c, Window, EventMask), cookie)
 	return SelectCursorInputCookie{cookie}
@@ -626,6 +650,9 @@ type GetCursorImageCookie struct {
 // GetCursorImage sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetCursorImageCookie.Reply()
 func GetCursorImage(c *xgb.Conn) GetCursorImageCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'GetCursorImage' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getCursorImageRequest(c), cookie)
 	return GetCursorImageCookie{cookie}
@@ -634,6 +661,9 @@ func GetCursorImage(c *xgb.Conn) GetCursorImageCookie {
 // GetCursorImageUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetCursorImageUnchecked(c *xgb.Conn) GetCursorImageCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'GetCursorImage' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getCursorImageRequest(c), cookie)
 	return GetCursorImageCookie{cookie}
@@ -740,6 +770,9 @@ type CreateRegionCookie struct {
 // CreateRegion sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateRegion(c *xgb.Conn, Region Region, Rectangles []xproto.Rectangle) CreateRegionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'CreateRegion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createRegionRequest(c, Region, Rectangles), cookie)
 	return CreateRegionCookie{cookie}
@@ -748,6 +781,9 @@ func CreateRegion(c *xgb.Conn, Region Region, Rectangles []xproto.Rectangle) Cre
 // CreateRegionChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreateRegionCookie.Check()
 func CreateRegionChecked(c *xgb.Conn, Region Region, Rectangles []xproto.Rectangle) CreateRegionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'CreateRegion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createRegionRequest(c, Region, Rectangles), cookie)
 	return CreateRegionCookie{cookie}
@@ -791,6 +827,9 @@ type CreateRegionFromBitmapCookie struct {
 // CreateRegionFromBitmap sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateRegionFromBitmap(c *xgb.Conn, Region Region, Bitmap xproto.Pixmap) CreateRegionFromBitmapCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'CreateRegionFromBitmap' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createRegionFromBitmapRequest(c, Region, Bitmap), cookie)
 	return CreateRegionFromBitmapCookie{cookie}
@@ -799,6 +838,9 @@ func CreateRegionFromBitmap(c *xgb.Conn, Region Region, Bitmap xproto.Pixmap) Cr
 // CreateRegionFromBitmapChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreateRegionFromBitmapCookie.Check()
 func CreateRegionFromBitmapChecked(c *xgb.Conn, Region Region, Bitmap xproto.Pixmap) CreateRegionFromBitmapCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'CreateRegionFromBitmap' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createRegionFromBitmapRequest(c, Region, Bitmap), cookie)
 	return CreateRegionFromBitmapCookie{cookie}
@@ -843,6 +885,9 @@ type CreateRegionFromWindowCookie struct {
 // CreateRegionFromWindow sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateRegionFromWindow(c *xgb.Conn, Region Region, Window xproto.Window, Kind shape.Kind) CreateRegionFromWindowCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'CreateRegionFromWindow' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createRegionFromWindowRequest(c, Region, Window, Kind), cookie)
 	return CreateRegionFromWindowCookie{cookie}
@@ -851,6 +896,9 @@ func CreateRegionFromWindow(c *xgb.Conn, Region Region, Window xproto.Window, Ki
 // CreateRegionFromWindowChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreateRegionFromWindowCookie.Check()
 func CreateRegionFromWindowChecked(c *xgb.Conn, Region Region, Window xproto.Window, Kind shape.Kind) CreateRegionFromWindowCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'CreateRegionFromWindow' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createRegionFromWindowRequest(c, Region, Window, Kind), cookie)
 	return CreateRegionFromWindowCookie{cookie}
@@ -900,6 +948,9 @@ type CreateRegionFromGCCookie struct {
 // CreateRegionFromGC sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateRegionFromGC(c *xgb.Conn, Region Region, Gc xproto.Gcontext) CreateRegionFromGCCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'CreateRegionFromGC' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createRegionFromGCRequest(c, Region, Gc), cookie)
 	return CreateRegionFromGCCookie{cookie}
@@ -908,6 +959,9 @@ func CreateRegionFromGC(c *xgb.Conn, Region Region, Gc xproto.Gcontext) CreateRe
 // CreateRegionFromGCChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreateRegionFromGCCookie.Check()
 func CreateRegionFromGCChecked(c *xgb.Conn, Region Region, Gc xproto.Gcontext) CreateRegionFromGCCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'CreateRegionFromGC' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createRegionFromGCRequest(c, Region, Gc), cookie)
 	return CreateRegionFromGCCookie{cookie}
@@ -952,6 +1006,9 @@ type CreateRegionFromPictureCookie struct {
 // CreateRegionFromPicture sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateRegionFromPicture(c *xgb.Conn, Region Region, Picture render.Picture) CreateRegionFromPictureCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'CreateRegionFromPicture' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createRegionFromPictureRequest(c, Region, Picture), cookie)
 	return CreateRegionFromPictureCookie{cookie}
@@ -960,6 +1017,9 @@ func CreateRegionFromPicture(c *xgb.Conn, Region Region, Picture render.Picture)
 // CreateRegionFromPictureChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreateRegionFromPictureCookie.Check()
 func CreateRegionFromPictureChecked(c *xgb.Conn, Region Region, Picture render.Picture) CreateRegionFromPictureCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'CreateRegionFromPicture' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createRegionFromPictureRequest(c, Region, Picture), cookie)
 	return CreateRegionFromPictureCookie{cookie}
@@ -1004,6 +1064,9 @@ type DestroyRegionCookie struct {
 // DestroyRegion sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func DestroyRegion(c *xgb.Conn, Region Region) DestroyRegionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'DestroyRegion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(destroyRegionRequest(c, Region), cookie)
 	return DestroyRegionCookie{cookie}
@@ -1012,6 +1075,9 @@ func DestroyRegion(c *xgb.Conn, Region Region) DestroyRegionCookie {
 // DestroyRegionChecked sends a checked request.
 // If an error occurs, it can be retrieved using DestroyRegionCookie.Check()
 func DestroyRegionChecked(c *xgb.Conn, Region Region) DestroyRegionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'DestroyRegion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(destroyRegionRequest(c, Region), cookie)
 	return DestroyRegionCookie{cookie}
@@ -1053,6 +1119,9 @@ type SetRegionCookie struct {
 // SetRegion sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetRegion(c *xgb.Conn, Region Region, Rectangles []xproto.Rectangle) SetRegionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'SetRegion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setRegionRequest(c, Region, Rectangles), cookie)
 	return SetRegionCookie{cookie}
@@ -1061,6 +1130,9 @@ func SetRegion(c *xgb.Conn, Region Region, Rectangles []xproto.Rectangle) SetReg
 // SetRegionChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetRegionCookie.Check()
 func SetRegionChecked(c *xgb.Conn, Region Region, Rectangles []xproto.Rectangle) SetRegionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'SetRegion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setRegionRequest(c, Region, Rectangles), cookie)
 	return SetRegionCookie{cookie}
@@ -1104,6 +1176,9 @@ type CopyRegionCookie struct {
 // CopyRegion sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CopyRegion(c *xgb.Conn, Source Region, Destination Region) CopyRegionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'CopyRegion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(copyRegionRequest(c, Source, Destination), cookie)
 	return CopyRegionCookie{cookie}
@@ -1112,6 +1187,9 @@ func CopyRegion(c *xgb.Conn, Source Region, Destination Region) CopyRegionCookie
 // CopyRegionChecked sends a checked request.
 // If an error occurs, it can be retrieved using CopyRegionCookie.Check()
 func CopyRegionChecked(c *xgb.Conn, Source Region, Destination Region) CopyRegionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'CopyRegion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(copyRegionRequest(c, Source, Destination), cookie)
 	return CopyRegionCookie{cookie}
@@ -1156,6 +1234,9 @@ type UnionRegionCookie struct {
 // UnionRegion sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func UnionRegion(c *xgb.Conn, Source1 Region, Source2 Region, Destination Region) UnionRegionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'UnionRegion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(unionRegionRequest(c, Source1, Source2, Destination), cookie)
 	return UnionRegionCookie{cookie}
@@ -1164,6 +1245,9 @@ func UnionRegion(c *xgb.Conn, Source1 Region, Source2 Region, Destination Region
 // UnionRegionChecked sends a checked request.
 // If an error occurs, it can be retrieved using UnionRegionCookie.Check()
 func UnionRegionChecked(c *xgb.Conn, Source1 Region, Source2 Region, Destination Region) UnionRegionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'UnionRegion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(unionRegionRequest(c, Source1, Source2, Destination), cookie)
 	return UnionRegionCookie{cookie}
@@ -1211,6 +1295,9 @@ type IntersectRegionCookie struct {
 // IntersectRegion sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func IntersectRegion(c *xgb.Conn, Source1 Region, Source2 Region, Destination Region) IntersectRegionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'IntersectRegion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(intersectRegionRequest(c, Source1, Source2, Destination), cookie)
 	return IntersectRegionCookie{cookie}
@@ -1219,6 +1306,9 @@ func IntersectRegion(c *xgb.Conn, Source1 Region, Source2 Region, Destination Re
 // IntersectRegionChecked sends a checked request.
 // If an error occurs, it can be retrieved using IntersectRegionCookie.Check()
 func IntersectRegionChecked(c *xgb.Conn, Source1 Region, Source2 Region, Destination Region) IntersectRegionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'IntersectRegion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(intersectRegionRequest(c, Source1, Source2, Destination), cookie)
 	return IntersectRegionCookie{cookie}
@@ -1266,6 +1356,9 @@ type SubtractRegionCookie struct {
 // SubtractRegion sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SubtractRegion(c *xgb.Conn, Source1 Region, Source2 Region, Destination Region) SubtractRegionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'SubtractRegion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(subtractRegionRequest(c, Source1, Source2, Destination), cookie)
 	return SubtractRegionCookie{cookie}
@@ -1274,6 +1367,9 @@ func SubtractRegion(c *xgb.Conn, Source1 Region, Source2 Region, Destination Reg
 // SubtractRegionChecked sends a checked request.
 // If an error occurs, it can be retrieved using SubtractRegionCookie.Check()
 func SubtractRegionChecked(c *xgb.Conn, Source1 Region, Source2 Region, Destination Region) SubtractRegionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'SubtractRegion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(subtractRegionRequest(c, Source1, Source2, Destination), cookie)
 	return SubtractRegionCookie{cookie}
@@ -1321,6 +1417,9 @@ type InvertRegionCookie struct {
 // InvertRegion sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func InvertRegion(c *xgb.Conn, Source Region, Bounds xproto.Rectangle, Destination Region) InvertRegionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'InvertRegion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(invertRegionRequest(c, Source, Bounds, Destination), cookie)
 	return InvertRegionCookie{cookie}
@@ -1329,6 +1428,9 @@ func InvertRegion(c *xgb.Conn, Source Region, Bounds xproto.Rectangle, Destinati
 // InvertRegionChecked sends a checked request.
 // If an error occurs, it can be retrieved using InvertRegionCookie.Check()
 func InvertRegionChecked(c *xgb.Conn, Source Region, Bounds xproto.Rectangle, Destination Region) InvertRegionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'InvertRegion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(invertRegionRequest(c, Source, Bounds, Destination), cookie)
 	return InvertRegionCookie{cookie}
@@ -1379,6 +1481,9 @@ type TranslateRegionCookie struct {
 // TranslateRegion sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func TranslateRegion(c *xgb.Conn, Region Region, Dx int16, Dy int16) TranslateRegionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'TranslateRegion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(translateRegionRequest(c, Region, Dx, Dy), cookie)
 	return TranslateRegionCookie{cookie}
@@ -1387,6 +1492,9 @@ func TranslateRegion(c *xgb.Conn, Region Region, Dx int16, Dy int16) TranslateRe
 // TranslateRegionChecked sends a checked request.
 // If an error occurs, it can be retrieved using TranslateRegionCookie.Check()
 func TranslateRegionChecked(c *xgb.Conn, Region Region, Dx int16, Dy int16) TranslateRegionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'TranslateRegion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(translateRegionRequest(c, Region, Dx, Dy), cookie)
 	return TranslateRegionCookie{cookie}
@@ -1434,6 +1542,9 @@ type RegionExtentsCookie struct {
 // RegionExtents sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func RegionExtents(c *xgb.Conn, Source Region, Destination Region) RegionExtentsCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'RegionExtents' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(regionExtentsRequest(c, Source, Destination), cookie)
 	return RegionExtentsCookie{cookie}
@@ -1442,6 +1553,9 @@ func RegionExtents(c *xgb.Conn, Source Region, Destination Region) RegionExtents
 // RegionExtentsChecked sends a checked request.
 // If an error occurs, it can be retrieved using RegionExtentsCookie.Check()
 func RegionExtentsChecked(c *xgb.Conn, Source Region, Destination Region) RegionExtentsCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'RegionExtents' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(regionExtentsRequest(c, Source, Destination), cookie)
 	return RegionExtentsCookie{cookie}
@@ -1486,6 +1600,9 @@ type FetchRegionCookie struct {
 // FetchRegion sends a checked request.
 // If an error occurs, it will be returned with the reply by calling FetchRegionCookie.Reply()
 func FetchRegion(c *xgb.Conn, Region Region) FetchRegionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'FetchRegion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(fetchRegionRequest(c, Region), cookie)
 	return FetchRegionCookie{cookie}
@@ -1494,6 +1611,9 @@ func FetchRegion(c *xgb.Conn, Region Region) FetchRegionCookie {
 // FetchRegionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func FetchRegionUnchecked(c *xgb.Conn, Region Region) FetchRegionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'FetchRegion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(fetchRegionRequest(c, Region), cookie)
 	return FetchRegionCookie{cookie}
@@ -1575,6 +1695,9 @@ type SetGCClipRegionCookie struct {
 // SetGCClipRegion sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetGCClipRegion(c *xgb.Conn, Gc xproto.Gcontext, Region Region, XOrigin int16, YOrigin int16) SetGCClipRegionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'SetGCClipRegion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setGCClipRegionRequest(c, Gc, Region, XOrigin, YOrigin), cookie)
 	return SetGCClipRegionCookie{cookie}
@@ -1583,6 +1706,9 @@ func SetGCClipRegion(c *xgb.Conn, Gc xproto.Gcontext, Region Region, XOrigin int
 // SetGCClipRegionChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetGCClipRegionCookie.Check()
 func SetGCClipRegionChecked(c *xgb.Conn, Gc xproto.Gcontext, Region Region, XOrigin int16, YOrigin int16) SetGCClipRegionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'SetGCClipRegion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setGCClipRegionRequest(c, Gc, Region, XOrigin, YOrigin), cookie)
 	return SetGCClipRegionCookie{cookie}
@@ -1633,6 +1759,9 @@ type SetWindowShapeRegionCookie struct {
 // SetWindowShapeRegion sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetWindowShapeRegion(c *xgb.Conn, Dest xproto.Window, DestKind shape.Kind, XOffset int16, YOffset int16, Region Region) SetWindowShapeRegionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'SetWindowShapeRegion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setWindowShapeRegionRequest(c, Dest, DestKind, XOffset, YOffset, Region), cookie)
 	return SetWindowShapeRegionCookie{cookie}
@@ -1641,6 +1770,9 @@ func SetWindowShapeRegion(c *xgb.Conn, Dest xproto.Window, DestKind shape.Kind,
 // SetWindowShapeRegionChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetWindowShapeRegionCookie.Check()
 func SetWindowShapeRegionChecked(c *xgb.Conn, Dest xproto.Window, DestKind shape.Kind, XOffset int16, YOffset int16, Region Region) SetWindowShapeRegionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'SetWindowShapeRegion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setWindowShapeRegionRequest(c, Dest, DestKind, XOffset, YOffset, Region), cookie)
 	return SetWindowShapeRegionCookie{cookie}
@@ -1696,6 +1828,9 @@ type SetPictureClipRegionCookie struct {
 // SetPictureClipRegion sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetPictureClipRegion(c *xgb.Conn, Picture render.Picture, Region Region, XOrigin int16, YOrigin int16) SetPictureClipRegionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'SetPictureClipRegion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setPictureClipRegionRequest(c, Picture, Region, XOrigin, YOrigin), cookie)
 	return SetPictureClipRegionCookie{cookie}
@@ -1704,6 +1839,9 @@ func SetPictureClipRegion(c *xgb.Conn, Picture render.Picture, Region Region, XO
 // SetPictureClipRegionChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetPictureClipRegionCookie.Check()
 func SetPictureClipRegionChecked(c *xgb.Conn, Picture render.Picture, Region Region, XOrigin int16, YOrigin int16) SetPictureClipRegionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'SetPictureClipRegion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setPictureClipRegionRequest(c, Picture, Region, XOrigin, YOrigin), cookie)
 	return SetPictureClipRegionCookie{cookie}
@@ -1754,6 +1892,9 @@ type SetCursorNameCookie struct {
 // SetCursorName sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetCursorName(c *xgb.Conn, Cursor xproto.Cursor, Nbytes uint16, Name string) SetCursorNameCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'SetCursorName' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setCursorNameRequest(c, Cursor, Nbytes, Name), cookie)
 	return SetCursorNameCookie{cookie}
@@ -1762,6 +1903,9 @@ func SetCursorName(c *xgb.Conn, Cursor xproto.Cursor, Nbytes uint16, Name string
 // SetCursorNameChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetCursorNameCookie.Check()
 func SetCursorNameChecked(c *xgb.Conn, Cursor xproto.Cursor, Nbytes uint16, Name string) SetCursorNameCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'SetCursorName' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setCursorNameRequest(c, Cursor, Nbytes, Name), cookie)
 	return SetCursorNameCookie{cookie}
@@ -1811,6 +1955,9 @@ type GetCursorNameCookie struct {
 // GetCursorName sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetCursorNameCookie.Reply()
 func GetCursorName(c *xgb.Conn, Cursor xproto.Cursor) GetCursorNameCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'GetCursorName' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getCursorNameRequest(c, Cursor), cookie)
 	return GetCursorNameCookie{cookie}
@@ -1819,6 +1966,9 @@ func GetCursorName(c *xgb.Conn, Cursor xproto.Cursor) GetCursorNameCookie {
 // GetCursorNameUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetCursorNameUnchecked(c *xgb.Conn, Cursor xproto.Cursor) GetCursorNameCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'GetCursorName' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getCursorNameRequest(c, Cursor), cookie)
 	return GetCursorNameCookie{cookie}
@@ -1908,6 +2058,9 @@ type GetCursorImageAndNameCookie struct {
 // GetCursorImageAndName sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetCursorImageAndNameCookie.Reply()
 func GetCursorImageAndName(c *xgb.Conn) GetCursorImageAndNameCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'GetCursorImageAndName' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getCursorImageAndNameRequest(c), cookie)
 	return GetCursorImageAndNameCookie{cookie}
@@ -1916,6 +2069,9 @@ func GetCursorImageAndName(c *xgb.Conn) GetCursorImageAndNameCookie {
 // GetCursorImageAndNameUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetCursorImageAndNameUnchecked(c *xgb.Conn) GetCursorImageAndNameCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'GetCursorImageAndName' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getCursorImageAndNameRequest(c), cookie)
 	return GetCursorImageAndNameCookie{cookie}
@@ -2038,6 +2194,9 @@ type ChangeCursorCookie struct {
 // ChangeCursor sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ChangeCursor(c *xgb.Conn, Source xproto.Cursor, Destination xproto.Cursor) ChangeCursorCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'ChangeCursor' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(changeCursorRequest(c, Source, Destination), cookie)
 	return ChangeCursorCookie{cookie}
@@ -2046,6 +2205,9 @@ func ChangeCursor(c *xgb.Conn, Source xproto.Cursor, Destination xproto.Cursor)
 // ChangeCursorChecked sends a checked request.
 // If an error occurs, it can be retrieved using ChangeCursorCookie.Check()
 func ChangeCursorChecked(c *xgb.Conn, Source xproto.Cursor, Destination xproto.Cursor) ChangeCursorCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'ChangeCursor' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(changeCursorRequest(c, Source, Destination), cookie)
 	return ChangeCursorCookie{cookie}
@@ -2090,6 +2252,9 @@ type ChangeCursorByNameCookie struct {
 // ChangeCursorByName sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ChangeCursorByName(c *xgb.Conn, Src xproto.Cursor, Nbytes uint16, Name string) ChangeCursorByNameCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'ChangeCursorByName' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(changeCursorByNameRequest(c, Src, Nbytes, Name), cookie)
 	return ChangeCursorByNameCookie{cookie}
@@ -2098,6 +2263,9 @@ func ChangeCursorByName(c *xgb.Conn, Src xproto.Cursor, Nbytes uint16, Name stri
 // ChangeCursorByNameChecked sends a checked request.
 // If an error occurs, it can be retrieved using ChangeCursorByNameCookie.Check()
 func ChangeCursorByNameChecked(c *xgb.Conn, Src xproto.Cursor, Nbytes uint16, Name string) ChangeCursorByNameCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'ChangeCursorByName' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(changeCursorByNameRequest(c, Src, Nbytes, Name), cookie)
 	return ChangeCursorByNameCookie{cookie}
@@ -2147,6 +2315,9 @@ type ExpandRegionCookie struct {
 // ExpandRegion sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ExpandRegion(c *xgb.Conn, Source Region, Destination Region, Left uint16, Right uint16, Top uint16, Bottom uint16) ExpandRegionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'ExpandRegion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(expandRegionRequest(c, Source, Destination, Left, Right, Top, Bottom), cookie)
 	return ExpandRegionCookie{cookie}
@@ -2155,6 +2326,9 @@ func ExpandRegion(c *xgb.Conn, Source Region, Destination Region, Left uint16, R
 // ExpandRegionChecked sends a checked request.
 // If an error occurs, it can be retrieved using ExpandRegionCookie.Check()
 func ExpandRegionChecked(c *xgb.Conn, Source Region, Destination Region, Left uint16, Right uint16, Top uint16, Bottom uint16) ExpandRegionCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'ExpandRegion' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(expandRegionRequest(c, Source, Destination, Left, Right, Top, Bottom), cookie)
 	return ExpandRegionCookie{cookie}
@@ -2211,6 +2385,9 @@ type HideCursorCookie struct {
 // HideCursor sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func HideCursor(c *xgb.Conn, Window xproto.Window) HideCursorCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'HideCursor' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(hideCursorRequest(c, Window), cookie)
 	return HideCursorCookie{cookie}
@@ -2219,6 +2396,9 @@ func HideCursor(c *xgb.Conn, Window xproto.Window) HideCursorCookie {
 // HideCursorChecked sends a checked request.
 // If an error occurs, it can be retrieved using HideCursorCookie.Check()
 func HideCursorChecked(c *xgb.Conn, Window xproto.Window) HideCursorCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'HideCursor' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(hideCursorRequest(c, Window), cookie)
 	return HideCursorCookie{cookie}
@@ -2260,6 +2440,9 @@ type ShowCursorCookie struct {
 // ShowCursor sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ShowCursor(c *xgb.Conn, Window xproto.Window) ShowCursorCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'ShowCursor' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(showCursorRequest(c, Window), cookie)
 	return ShowCursorCookie{cookie}
@@ -2268,6 +2451,9 @@ func ShowCursor(c *xgb.Conn, Window xproto.Window) ShowCursorCookie {
 // ShowCursorChecked sends a checked request.
 // If an error occurs, it can be retrieved using ShowCursorCookie.Check()
 func ShowCursorChecked(c *xgb.Conn, Window xproto.Window) ShowCursorCookie {
+	if _, ok := c.Extensions["XFIXES"]; !ok {
+		panic("Cannot issue request 'ShowCursor' using the uninitialized extension 'XFIXES'. xfixes.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(showCursorRequest(c, Window), cookie)
 	return ShowCursorCookie{cookie}
diff --git a/nexgb/xgbgen/go_request_reply.go b/nexgb/xgbgen/go_request_reply.go
index eca0c10..62d9936 100644
--- a/nexgb/xgbgen/go_request_reply.go
+++ b/nexgb/xgbgen/go_request_reply.go
@@ -18,6 +18,7 @@ func (r *Request) Define(c *Context) {
 			"by calling %s.Reply()", r.CookieName())
 		c.Putln("func %s(c *xgb.Conn, %s) %s {",
 			r.SrcName(), r.ParamNameTypes(), r.CookieName())
+		r.CheckExt(c)
 		c.Putln("cookie := c.NewCookie(true, true)")
 		c.Putln("c.NewRequest(%s(c, %s), cookie)", r.ReqName(), r.ParamNames())
 		c.Putln("return %s{cookie}", r.CookieName())
@@ -29,6 +30,7 @@ func (r *Request) Define(c *Context) {
 			"xgb.WaitForEvent or xgb.PollForEvent.")
 		c.Putln("func %sUnchecked(c *xgb.Conn, %s) %s {",
 			r.SrcName(), r.ParamNameTypes(), r.CookieName())
+		r.CheckExt(c)
 		c.Putln("cookie := c.NewCookie(false, true)")
 		c.Putln("c.NewRequest(%s(c, %s), cookie)", r.ReqName(), r.ParamNames())
 		c.Putln("return %s{cookie}", r.CookieName())
@@ -42,6 +44,7 @@ func (r *Request) Define(c *Context) {
 			"xgb.WaitForEvent or xgb.PollForEvent.")
 		c.Putln("func %s(c *xgb.Conn, %s) %s {",
 			r.SrcName(), r.ParamNameTypes(), r.CookieName())
+		r.CheckExt(c)
 		c.Putln("cookie := c.NewCookie(false, false)")
 		c.Putln("c.NewRequest(%s(c, %s), cookie)", r.ReqName(), r.ParamNames())
 		c.Putln("return %s{cookie}", r.CookieName())
@@ -53,6 +56,7 @@ func (r *Request) Define(c *Context) {
 			"%s.Check()", r.CookieName())
 		c.Putln("func %sChecked(c *xgb.Conn, %s) %s {",
 			r.SrcName(), r.ParamNameTypes(), r.CookieName())
+		r.CheckExt(c)
 		c.Putln("cookie := c.NewCookie(true, false)")
 		c.Putln("c.NewRequest(%s(c, %s), cookie)", r.ReqName(), r.ParamNames())
 		c.Putln("return %s{cookie}", r.CookieName())
@@ -71,6 +75,18 @@ func (r *Request) Define(c *Context) {
 	r.WriteRequest(c)
 }
 
+func (r *Request) CheckExt(c *Context) {
+	if !c.protocol.isExt() {
+		return
+	}
+	c.Putln("if _, ok := c.Extensions[\"%s\"]; !ok {",
+		strings.ToUpper(c.protocol.ExtXName))
+	c.Putln("panic(\"Cannot issue request '%s' using the uninitialized " +
+		"extension '%s'. %s.Init(connObj) must be called first.\")",
+		r.SrcName(), c.protocol.ExtXName, c.protocol.PkgName())
+	c.Putln("}")
+}
+
 func (r *Request) ReadReply(c *Context) {
 	c.Putln("// %s represents the data returned from a %s request.",
 		r.ReplyTypeName(), r.SrcName())
diff --git a/nexgb/xinerama/xinerama.go b/nexgb/xinerama/xinerama.go
index b03a381..51b270a 100644
--- a/nexgb/xinerama/xinerama.go
+++ b/nexgb/xinerama/xinerama.go
@@ -2,7 +2,7 @@
 package xinerama
 
 /*
-	This file was generated by xinerama.xml on May 11 2012 1:58:36am EDT.
+	This file was generated by xinerama.xml on May 11 2012 11:57:20pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -40,6 +40,12 @@ func init() {
 	xgb.NewExtErrorFuncs["XINERAMA"] = make(map[int]xgb.NewErrorFun)
 }
 
+// Skipping definition for base type 'Int32'
+
+// Skipping definition for base type 'Void'
+
+// Skipping definition for base type 'Byte'
+
 // Skipping definition for base type 'Int8'
 
 // Skipping definition for base type 'Card16'
@@ -58,12 +64,6 @@ func init() {
 
 // Skipping definition for base type 'Int16'
 
-// Skipping definition for base type 'Int32'
-
-// Skipping definition for base type 'Void'
-
-// Skipping definition for base type 'Byte'
-
 type ScreenInfo struct {
 	XOrg   int16
 	YOrg   int16
@@ -140,6 +140,9 @@ type QueryVersionCookie struct {
 // QueryVersion sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryVersionCookie.Reply()
 func QueryVersion(c *xgb.Conn, Major byte, Minor byte) QueryVersionCookie {
+	if _, ok := c.Extensions["XINERAMA"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'XINERAMA'. xinerama.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryVersionRequest(c, Major, Minor), cookie)
 	return QueryVersionCookie{cookie}
@@ -148,6 +151,9 @@ func QueryVersion(c *xgb.Conn, Major byte, Minor byte) QueryVersionCookie {
 // QueryVersionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryVersionUnchecked(c *xgb.Conn, Major byte, Minor byte) QueryVersionCookie {
+	if _, ok := c.Extensions["XINERAMA"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'XINERAMA'. xinerama.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryVersionRequest(c, Major, Minor), cookie)
 	return QueryVersionCookie{cookie}
@@ -229,6 +235,9 @@ type GetStateCookie struct {
 // GetState sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetStateCookie.Reply()
 func GetState(c *xgb.Conn, Window xproto.Window) GetStateCookie {
+	if _, ok := c.Extensions["XINERAMA"]; !ok {
+		panic("Cannot issue request 'GetState' using the uninitialized extension 'XINERAMA'. xinerama.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getStateRequest(c, Window), cookie)
 	return GetStateCookie{cookie}
@@ -237,6 +246,9 @@ func GetState(c *xgb.Conn, Window xproto.Window) GetStateCookie {
 // GetStateUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetStateUnchecked(c *xgb.Conn, Window xproto.Window) GetStateCookie {
+	if _, ok := c.Extensions["XINERAMA"]; !ok {
+		panic("Cannot issue request 'GetState' using the uninitialized extension 'XINERAMA'. xinerama.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getStateRequest(c, Window), cookie)
 	return GetStateCookie{cookie}
@@ -312,6 +324,9 @@ type GetScreenCountCookie struct {
 // GetScreenCount sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetScreenCountCookie.Reply()
 func GetScreenCount(c *xgb.Conn, Window xproto.Window) GetScreenCountCookie {
+	if _, ok := c.Extensions["XINERAMA"]; !ok {
+		panic("Cannot issue request 'GetScreenCount' using the uninitialized extension 'XINERAMA'. xinerama.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getScreenCountRequest(c, Window), cookie)
 	return GetScreenCountCookie{cookie}
@@ -320,6 +335,9 @@ func GetScreenCount(c *xgb.Conn, Window xproto.Window) GetScreenCountCookie {
 // GetScreenCountUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetScreenCountUnchecked(c *xgb.Conn, Window xproto.Window) GetScreenCountCookie {
+	if _, ok := c.Extensions["XINERAMA"]; !ok {
+		panic("Cannot issue request 'GetScreenCount' using the uninitialized extension 'XINERAMA'. xinerama.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getScreenCountRequest(c, Window), cookie)
 	return GetScreenCountCookie{cookie}
@@ -395,6 +413,9 @@ type GetScreenSizeCookie struct {
 // GetScreenSize sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetScreenSizeCookie.Reply()
 func GetScreenSize(c *xgb.Conn, Window xproto.Window, Screen uint32) GetScreenSizeCookie {
+	if _, ok := c.Extensions["XINERAMA"]; !ok {
+		panic("Cannot issue request 'GetScreenSize' using the uninitialized extension 'XINERAMA'. xinerama.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getScreenSizeRequest(c, Window, Screen), cookie)
 	return GetScreenSizeCookie{cookie}
@@ -403,6 +424,9 @@ func GetScreenSize(c *xgb.Conn, Window xproto.Window, Screen uint32) GetScreenSi
 // GetScreenSizeUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetScreenSizeUnchecked(c *xgb.Conn, Window xproto.Window, Screen uint32) GetScreenSizeCookie {
+	if _, ok := c.Extensions["XINERAMA"]; !ok {
+		panic("Cannot issue request 'GetScreenSize' using the uninitialized extension 'XINERAMA'. xinerama.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getScreenSizeRequest(c, Window, Screen), cookie)
 	return GetScreenSizeCookie{cookie}
@@ -492,6 +516,9 @@ type IsActiveCookie struct {
 // IsActive sends a checked request.
 // If an error occurs, it will be returned with the reply by calling IsActiveCookie.Reply()
 func IsActive(c *xgb.Conn) IsActiveCookie {
+	if _, ok := c.Extensions["XINERAMA"]; !ok {
+		panic("Cannot issue request 'IsActive' using the uninitialized extension 'XINERAMA'. xinerama.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(isActiveRequest(c), cookie)
 	return IsActiveCookie{cookie}
@@ -500,6 +527,9 @@ func IsActive(c *xgb.Conn) IsActiveCookie {
 // IsActiveUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func IsActiveUnchecked(c *xgb.Conn) IsActiveCookie {
+	if _, ok := c.Extensions["XINERAMA"]; !ok {
+		panic("Cannot issue request 'IsActive' using the uninitialized extension 'XINERAMA'. xinerama.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(isActiveRequest(c), cookie)
 	return IsActiveCookie{cookie}
@@ -571,6 +601,9 @@ type QueryScreensCookie struct {
 // QueryScreens sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryScreensCookie.Reply()
 func QueryScreens(c *xgb.Conn) QueryScreensCookie {
+	if _, ok := c.Extensions["XINERAMA"]; !ok {
+		panic("Cannot issue request 'QueryScreens' using the uninitialized extension 'XINERAMA'. xinerama.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryScreensRequest(c), cookie)
 	return QueryScreensCookie{cookie}
@@ -579,6 +612,9 @@ func QueryScreens(c *xgb.Conn) QueryScreensCookie {
 // QueryScreensUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryScreensUnchecked(c *xgb.Conn) QueryScreensCookie {
+	if _, ok := c.Extensions["XINERAMA"]; !ok {
+		panic("Cannot issue request 'QueryScreens' using the uninitialized extension 'XINERAMA'. xinerama.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryScreensRequest(c), cookie)
 	return QueryScreensCookie{cookie}
diff --git a/nexgb/xinput/xinput.go b/nexgb/xinput/xinput.go
index 0cb711b..2ed45b8 100644
--- a/nexgb/xinput/xinput.go
+++ b/nexgb/xinput/xinput.go
@@ -2,7 +2,7 @@
 package xinput
 
 /*
-	This file was generated by xinput.xml on May 11 2012 1:58:36am EDT.
+	This file was generated by xinput.xml on May 11 2012 11:57:20pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -40,14 +40,6 @@ func init() {
 	xgb.NewExtErrorFuncs["XInputExtension"] = make(map[int]xgb.NewErrorFun)
 }
 
-// Skipping definition for base type 'Float'
-
-// Skipping definition for base type 'Card8'
-
-// Skipping definition for base type 'Int16'
-
-// Skipping definition for base type 'Int32'
-
 // Skipping definition for base type 'Void'
 
 // Skipping definition for base type 'Byte'
@@ -64,6 +56,14 @@ func init() {
 
 // Skipping definition for base type 'Bool'
 
+// Skipping definition for base type 'Float'
+
+// Skipping definition for base type 'Card8'
+
+// Skipping definition for base type 'Int16'
+
+// Skipping definition for base type 'Int32'
+
 const (
 	ValuatorModeRelative = 0
 	ValuatorModeAbsolute = 1
@@ -4582,6 +4582,9 @@ type GetExtensionVersionCookie struct {
 // GetExtensionVersion sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetExtensionVersionCookie.Reply()
 func GetExtensionVersion(c *xgb.Conn, NameLen uint16, Name string) GetExtensionVersionCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetExtensionVersion' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getExtensionVersionRequest(c, NameLen, Name), cookie)
 	return GetExtensionVersionCookie{cookie}
@@ -4590,6 +4593,9 @@ func GetExtensionVersion(c *xgb.Conn, NameLen uint16, Name string) GetExtensionV
 // GetExtensionVersionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetExtensionVersionUnchecked(c *xgb.Conn, NameLen uint16, Name string) GetExtensionVersionCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetExtensionVersion' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getExtensionVersionRequest(c, NameLen, Name), cookie)
 	return GetExtensionVersionCookie{cookie}
@@ -4684,6 +4690,9 @@ type ListInputDevicesCookie struct {
 // ListInputDevices sends a checked request.
 // If an error occurs, it will be returned with the reply by calling ListInputDevicesCookie.Reply()
 func ListInputDevices(c *xgb.Conn) ListInputDevicesCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'ListInputDevices' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(listInputDevicesRequest(c), cookie)
 	return ListInputDevicesCookie{cookie}
@@ -4692,6 +4701,9 @@ func ListInputDevices(c *xgb.Conn) ListInputDevicesCookie {
 // ListInputDevicesUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ListInputDevicesUnchecked(c *xgb.Conn) ListInputDevicesCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'ListInputDevices' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(listInputDevicesRequest(c), cookie)
 	return ListInputDevicesCookie{cookie}
@@ -4770,6 +4782,9 @@ type OpenDeviceCookie struct {
 // OpenDevice sends a checked request.
 // If an error occurs, it will be returned with the reply by calling OpenDeviceCookie.Reply()
 func OpenDevice(c *xgb.Conn, DeviceId byte) OpenDeviceCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'OpenDevice' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(openDeviceRequest(c, DeviceId), cookie)
 	return OpenDeviceCookie{cookie}
@@ -4778,6 +4793,9 @@ func OpenDevice(c *xgb.Conn, DeviceId byte) OpenDeviceCookie {
 // OpenDeviceUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func OpenDeviceUnchecked(c *xgb.Conn, DeviceId byte) OpenDeviceCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'OpenDevice' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(openDeviceRequest(c, DeviceId), cookie)
 	return OpenDeviceCookie{cookie}
@@ -4861,6 +4879,9 @@ type CloseDeviceCookie struct {
 // CloseDevice sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CloseDevice(c *xgb.Conn, DeviceId byte) CloseDeviceCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'CloseDevice' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(closeDeviceRequest(c, DeviceId), cookie)
 	return CloseDeviceCookie{cookie}
@@ -4869,6 +4890,9 @@ func CloseDevice(c *xgb.Conn, DeviceId byte) CloseDeviceCookie {
 // CloseDeviceChecked sends a checked request.
 // If an error occurs, it can be retrieved using CloseDeviceCookie.Check()
 func CloseDeviceChecked(c *xgb.Conn, DeviceId byte) CloseDeviceCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'CloseDevice' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(closeDeviceRequest(c, DeviceId), cookie)
 	return CloseDeviceCookie{cookie}
@@ -4912,6 +4936,9 @@ type SetDeviceModeCookie struct {
 // SetDeviceMode sends a checked request.
 // If an error occurs, it will be returned with the reply by calling SetDeviceModeCookie.Reply()
 func SetDeviceMode(c *xgb.Conn, DeviceId byte, Mode byte) SetDeviceModeCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'SetDeviceMode' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(setDeviceModeRequest(c, DeviceId, Mode), cookie)
 	return SetDeviceModeCookie{cookie}
@@ -4920,6 +4947,9 @@ func SetDeviceMode(c *xgb.Conn, DeviceId byte, Mode byte) SetDeviceModeCookie {
 // SetDeviceModeUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetDeviceModeUnchecked(c *xgb.Conn, DeviceId byte, Mode byte) SetDeviceModeCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'SetDeviceMode' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(setDeviceModeRequest(c, DeviceId, Mode), cookie)
 	return SetDeviceModeCookie{cookie}
@@ -5002,6 +5032,9 @@ type SelectExtensionEventCookie struct {
 // SelectExtensionEvent sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SelectExtensionEvent(c *xgb.Conn, Window xproto.Window, NumClasses uint16, Classes []EventClass) SelectExtensionEventCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'SelectExtensionEvent' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(selectExtensionEventRequest(c, Window, NumClasses, Classes), cookie)
 	return SelectExtensionEventCookie{cookie}
@@ -5010,6 +5043,9 @@ func SelectExtensionEvent(c *xgb.Conn, Window xproto.Window, NumClasses uint16,
 // SelectExtensionEventChecked sends a checked request.
 // If an error occurs, it can be retrieved using SelectExtensionEventCookie.Check()
 func SelectExtensionEventChecked(c *xgb.Conn, Window xproto.Window, NumClasses uint16, Classes []EventClass) SelectExtensionEventCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'SelectExtensionEvent' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(selectExtensionEventRequest(c, Window, NumClasses, Classes), cookie)
 	return SelectExtensionEventCookie{cookie}
@@ -5062,6 +5098,9 @@ type GetSelectedExtensionEventsCookie struct {
 // GetSelectedExtensionEvents sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetSelectedExtensionEventsCookie.Reply()
 func GetSelectedExtensionEvents(c *xgb.Conn, Window xproto.Window) GetSelectedExtensionEventsCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetSelectedExtensionEvents' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getSelectedExtensionEventsRequest(c, Window), cookie)
 	return GetSelectedExtensionEventsCookie{cookie}
@@ -5070,6 +5109,9 @@ func GetSelectedExtensionEvents(c *xgb.Conn, Window xproto.Window) GetSelectedEx
 // GetSelectedExtensionEventsUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetSelectedExtensionEventsUnchecked(c *xgb.Conn, Window xproto.Window) GetSelectedExtensionEventsCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetSelectedExtensionEvents' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getSelectedExtensionEventsRequest(c, Window), cookie)
 	return GetSelectedExtensionEventsCookie{cookie}
@@ -5167,6 +5209,9 @@ type ChangeDeviceDontPropagateListCookie struct {
 // ChangeDeviceDontPropagateList sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ChangeDeviceDontPropagateList(c *xgb.Conn, Window xproto.Window, NumClasses uint16, Mode byte, Classes []EventClass) ChangeDeviceDontPropagateListCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'ChangeDeviceDontPropagateList' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(changeDeviceDontPropagateListRequest(c, Window, NumClasses, Mode, Classes), cookie)
 	return ChangeDeviceDontPropagateListCookie{cookie}
@@ -5175,6 +5220,9 @@ func ChangeDeviceDontPropagateList(c *xgb.Conn, Window xproto.Window, NumClasses
 // ChangeDeviceDontPropagateListChecked sends a checked request.
 // If an error occurs, it can be retrieved using ChangeDeviceDontPropagateListCookie.Check()
 func ChangeDeviceDontPropagateListChecked(c *xgb.Conn, Window xproto.Window, NumClasses uint16, Mode byte, Classes []EventClass) ChangeDeviceDontPropagateListCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'ChangeDeviceDontPropagateList' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(changeDeviceDontPropagateListRequest(c, Window, NumClasses, Mode, Classes), cookie)
 	return ChangeDeviceDontPropagateListCookie{cookie}
@@ -5230,6 +5278,9 @@ type GetDeviceDontPropagateListCookie struct {
 // GetDeviceDontPropagateList sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetDeviceDontPropagateListCookie.Reply()
 func GetDeviceDontPropagateList(c *xgb.Conn, Window xproto.Window) GetDeviceDontPropagateListCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetDeviceDontPropagateList' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getDeviceDontPropagateListRequest(c, Window), cookie)
 	return GetDeviceDontPropagateListCookie{cookie}
@@ -5238,6 +5289,9 @@ func GetDeviceDontPropagateList(c *xgb.Conn, Window xproto.Window) GetDeviceDont
 // GetDeviceDontPropagateListUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetDeviceDontPropagateListUnchecked(c *xgb.Conn, Window xproto.Window) GetDeviceDontPropagateListCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetDeviceDontPropagateList' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getDeviceDontPropagateListRequest(c, Window), cookie)
 	return GetDeviceDontPropagateListCookie{cookie}
@@ -5323,6 +5377,9 @@ type GetDeviceMotionEventsCookie struct {
 // GetDeviceMotionEvents sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetDeviceMotionEventsCookie.Reply()
 func GetDeviceMotionEvents(c *xgb.Conn, Start xproto.Timestamp, Stop xproto.Timestamp, DeviceId byte) GetDeviceMotionEventsCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetDeviceMotionEvents' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getDeviceMotionEventsRequest(c, Start, Stop, DeviceId), cookie)
 	return GetDeviceMotionEventsCookie{cookie}
@@ -5331,6 +5388,9 @@ func GetDeviceMotionEvents(c *xgb.Conn, Start xproto.Timestamp, Stop xproto.Time
 // GetDeviceMotionEventsUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetDeviceMotionEventsUnchecked(c *xgb.Conn, Start xproto.Timestamp, Stop xproto.Timestamp, DeviceId byte) GetDeviceMotionEventsCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetDeviceMotionEvents' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getDeviceMotionEventsRequest(c, Start, Stop, DeviceId), cookie)
 	return GetDeviceMotionEventsCookie{cookie}
@@ -5422,6 +5482,9 @@ type ChangeKeyboardDeviceCookie struct {
 // ChangeKeyboardDevice sends a checked request.
 // If an error occurs, it will be returned with the reply by calling ChangeKeyboardDeviceCookie.Reply()
 func ChangeKeyboardDevice(c *xgb.Conn, DeviceId byte) ChangeKeyboardDeviceCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'ChangeKeyboardDevice' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(changeKeyboardDeviceRequest(c, DeviceId), cookie)
 	return ChangeKeyboardDeviceCookie{cookie}
@@ -5430,6 +5493,9 @@ func ChangeKeyboardDevice(c *xgb.Conn, DeviceId byte) ChangeKeyboardDeviceCookie
 // ChangeKeyboardDeviceUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ChangeKeyboardDeviceUnchecked(c *xgb.Conn, DeviceId byte) ChangeKeyboardDeviceCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'ChangeKeyboardDevice' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(changeKeyboardDeviceRequest(c, DeviceId), cookie)
 	return ChangeKeyboardDeviceCookie{cookie}
@@ -5509,6 +5575,9 @@ type ChangePointerDeviceCookie struct {
 // ChangePointerDevice sends a checked request.
 // If an error occurs, it will be returned with the reply by calling ChangePointerDeviceCookie.Reply()
 func ChangePointerDevice(c *xgb.Conn, XAxis byte, YAxis byte, DeviceId byte) ChangePointerDeviceCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'ChangePointerDevice' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(changePointerDeviceRequest(c, XAxis, YAxis, DeviceId), cookie)
 	return ChangePointerDeviceCookie{cookie}
@@ -5517,6 +5586,9 @@ func ChangePointerDevice(c *xgb.Conn, XAxis byte, YAxis byte, DeviceId byte) Cha
 // ChangePointerDeviceUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ChangePointerDeviceUnchecked(c *xgb.Conn, XAxis byte, YAxis byte, DeviceId byte) ChangePointerDeviceCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'ChangePointerDevice' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(changePointerDeviceRequest(c, XAxis, YAxis, DeviceId), cookie)
 	return ChangePointerDeviceCookie{cookie}
@@ -5602,6 +5674,9 @@ type GrabDeviceCookie struct {
 // GrabDevice sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GrabDeviceCookie.Reply()
 func GrabDevice(c *xgb.Conn, GrabWindow xproto.Window, Time xproto.Timestamp, NumClasses uint16, ThisDeviceMode byte, OtherDeviceMode byte, OwnerEvents bool, DeviceId byte, Classes []EventClass) GrabDeviceCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'GrabDevice' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(grabDeviceRequest(c, GrabWindow, Time, NumClasses, ThisDeviceMode, OtherDeviceMode, OwnerEvents, DeviceId, Classes), cookie)
 	return GrabDeviceCookie{cookie}
@@ -5610,6 +5685,9 @@ func GrabDevice(c *xgb.Conn, GrabWindow xproto.Window, Time xproto.Timestamp, Nu
 // GrabDeviceUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GrabDeviceUnchecked(c *xgb.Conn, GrabWindow xproto.Window, Time xproto.Timestamp, NumClasses uint16, ThisDeviceMode byte, OtherDeviceMode byte, OwnerEvents bool, DeviceId byte, Classes []EventClass) GrabDeviceCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'GrabDevice' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(grabDeviceRequest(c, GrabWindow, Time, NumClasses, ThisDeviceMode, OtherDeviceMode, OwnerEvents, DeviceId, Classes), cookie)
 	return GrabDeviceCookie{cookie}
@@ -5717,6 +5795,9 @@ type UngrabDeviceCookie struct {
 // UngrabDevice sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func UngrabDevice(c *xgb.Conn, Time xproto.Timestamp, DeviceId byte) UngrabDeviceCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'UngrabDevice' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(ungrabDeviceRequest(c, Time, DeviceId), cookie)
 	return UngrabDeviceCookie{cookie}
@@ -5725,6 +5806,9 @@ func UngrabDevice(c *xgb.Conn, Time xproto.Timestamp, DeviceId byte) UngrabDevic
 // UngrabDeviceChecked sends a checked request.
 // If an error occurs, it can be retrieved using UngrabDeviceCookie.Check()
 func UngrabDeviceChecked(c *xgb.Conn, Time xproto.Timestamp, DeviceId byte) UngrabDeviceCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'UngrabDevice' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(ungrabDeviceRequest(c, Time, DeviceId), cookie)
 	return UngrabDeviceCookie{cookie}
@@ -5769,6 +5853,9 @@ type GrabDeviceKeyCookie struct {
 // GrabDeviceKey sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GrabDeviceKey(c *xgb.Conn, GrabWindow xproto.Window, NumClasses uint16, Modifiers uint16, ModifierDevice byte, GrabbedDevice byte, Key byte, ThisDeviceMode byte, OtherDeviceMode byte, OwnerEvents bool, Classes []EventClass) GrabDeviceKeyCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'GrabDeviceKey' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(grabDeviceKeyRequest(c, GrabWindow, NumClasses, Modifiers, ModifierDevice, GrabbedDevice, Key, ThisDeviceMode, OtherDeviceMode, OwnerEvents, Classes), cookie)
 	return GrabDeviceKeyCookie{cookie}
@@ -5777,6 +5864,9 @@ func GrabDeviceKey(c *xgb.Conn, GrabWindow xproto.Window, NumClasses uint16, Mod
 // GrabDeviceKeyChecked sends a checked request.
 // If an error occurs, it can be retrieved using GrabDeviceKeyCookie.Check()
 func GrabDeviceKeyChecked(c *xgb.Conn, GrabWindow xproto.Window, NumClasses uint16, Modifiers uint16, ModifierDevice byte, GrabbedDevice byte, Key byte, ThisDeviceMode byte, OtherDeviceMode byte, OwnerEvents bool, Classes []EventClass) GrabDeviceKeyCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'GrabDeviceKey' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(grabDeviceKeyRequest(c, GrabWindow, NumClasses, Modifiers, ModifierDevice, GrabbedDevice, Key, ThisDeviceMode, OtherDeviceMode, OwnerEvents, Classes), cookie)
 	return GrabDeviceKeyCookie{cookie}
@@ -5854,6 +5944,9 @@ type UngrabDeviceKeyCookie struct {
 // UngrabDeviceKey sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func UngrabDeviceKey(c *xgb.Conn, GrabWindow xproto.Window, Modifiers uint16, ModifierDevice byte, Key byte, GrabbedDevice byte) UngrabDeviceKeyCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'UngrabDeviceKey' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(ungrabDeviceKeyRequest(c, GrabWindow, Modifiers, ModifierDevice, Key, GrabbedDevice), cookie)
 	return UngrabDeviceKeyCookie{cookie}
@@ -5862,6 +5955,9 @@ func UngrabDeviceKey(c *xgb.Conn, GrabWindow xproto.Window, Modifiers uint16, Mo
 // UngrabDeviceKeyChecked sends a checked request.
 // If an error occurs, it can be retrieved using UngrabDeviceKeyCookie.Check()
 func UngrabDeviceKeyChecked(c *xgb.Conn, GrabWindow xproto.Window, Modifiers uint16, ModifierDevice byte, Key byte, GrabbedDevice byte) UngrabDeviceKeyCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'UngrabDeviceKey' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(ungrabDeviceKeyRequest(c, GrabWindow, Modifiers, ModifierDevice, Key, GrabbedDevice), cookie)
 	return UngrabDeviceKeyCookie{cookie}
@@ -5915,6 +6011,9 @@ type GrabDeviceButtonCookie struct {
 // GrabDeviceButton sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GrabDeviceButton(c *xgb.Conn, GrabWindow xproto.Window, GrabbedDevice byte, ModifierDevice byte, NumClasses uint16, Modifiers uint16, ThisDeviceMode byte, OtherDeviceMode byte, Button byte, OwnerEvents byte, Classes []EventClass) GrabDeviceButtonCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'GrabDeviceButton' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(grabDeviceButtonRequest(c, GrabWindow, GrabbedDevice, ModifierDevice, NumClasses, Modifiers, ThisDeviceMode, OtherDeviceMode, Button, OwnerEvents, Classes), cookie)
 	return GrabDeviceButtonCookie{cookie}
@@ -5923,6 +6022,9 @@ func GrabDeviceButton(c *xgb.Conn, GrabWindow xproto.Window, GrabbedDevice byte,
 // GrabDeviceButtonChecked sends a checked request.
 // If an error occurs, it can be retrieved using GrabDeviceButtonCookie.Check()
 func GrabDeviceButtonChecked(c *xgb.Conn, GrabWindow xproto.Window, GrabbedDevice byte, ModifierDevice byte, NumClasses uint16, Modifiers uint16, ThisDeviceMode byte, OtherDeviceMode byte, Button byte, OwnerEvents byte, Classes []EventClass) GrabDeviceButtonCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'GrabDeviceButton' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(grabDeviceButtonRequest(c, GrabWindow, GrabbedDevice, ModifierDevice, NumClasses, Modifiers, ThisDeviceMode, OtherDeviceMode, Button, OwnerEvents, Classes), cookie)
 	return GrabDeviceButtonCookie{cookie}
@@ -5996,6 +6098,9 @@ type UngrabDeviceButtonCookie struct {
 // UngrabDeviceButton sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func UngrabDeviceButton(c *xgb.Conn, GrabWindow xproto.Window, Modifiers uint16, ModifierDevice byte, Button byte, GrabbedDevice byte) UngrabDeviceButtonCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'UngrabDeviceButton' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(ungrabDeviceButtonRequest(c, GrabWindow, Modifiers, ModifierDevice, Button, GrabbedDevice), cookie)
 	return UngrabDeviceButtonCookie{cookie}
@@ -6004,6 +6109,9 @@ func UngrabDeviceButton(c *xgb.Conn, GrabWindow xproto.Window, Modifiers uint16,
 // UngrabDeviceButtonChecked sends a checked request.
 // If an error occurs, it can be retrieved using UngrabDeviceButtonCookie.Check()
 func UngrabDeviceButtonChecked(c *xgb.Conn, GrabWindow xproto.Window, Modifiers uint16, ModifierDevice byte, Button byte, GrabbedDevice byte) UngrabDeviceButtonCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'UngrabDeviceButton' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(ungrabDeviceButtonRequest(c, GrabWindow, Modifiers, ModifierDevice, Button, GrabbedDevice), cookie)
 	return UngrabDeviceButtonCookie{cookie}
@@ -6057,6 +6165,9 @@ type AllowDeviceEventsCookie struct {
 // AllowDeviceEvents sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func AllowDeviceEvents(c *xgb.Conn, Time xproto.Timestamp, Mode byte, DeviceId byte) AllowDeviceEventsCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'AllowDeviceEvents' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(allowDeviceEventsRequest(c, Time, Mode, DeviceId), cookie)
 	return AllowDeviceEventsCookie{cookie}
@@ -6065,6 +6176,9 @@ func AllowDeviceEvents(c *xgb.Conn, Time xproto.Timestamp, Mode byte, DeviceId b
 // AllowDeviceEventsChecked sends a checked request.
 // If an error occurs, it can be retrieved using AllowDeviceEventsCookie.Check()
 func AllowDeviceEventsChecked(c *xgb.Conn, Time xproto.Timestamp, Mode byte, DeviceId byte) AllowDeviceEventsCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'AllowDeviceEvents' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(allowDeviceEventsRequest(c, Time, Mode, DeviceId), cookie)
 	return AllowDeviceEventsCookie{cookie}
@@ -6112,6 +6226,9 @@ type GetDeviceFocusCookie struct {
 // GetDeviceFocus sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetDeviceFocusCookie.Reply()
 func GetDeviceFocus(c *xgb.Conn, DeviceId byte) GetDeviceFocusCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetDeviceFocus' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getDeviceFocusRequest(c, DeviceId), cookie)
 	return GetDeviceFocusCookie{cookie}
@@ -6120,6 +6237,9 @@ func GetDeviceFocus(c *xgb.Conn, DeviceId byte) GetDeviceFocusCookie {
 // GetDeviceFocusUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetDeviceFocusUnchecked(c *xgb.Conn, DeviceId byte) GetDeviceFocusCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetDeviceFocus' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getDeviceFocusRequest(c, DeviceId), cookie)
 	return GetDeviceFocusCookie{cookie}
@@ -6207,6 +6327,9 @@ type SetDeviceFocusCookie struct {
 // SetDeviceFocus sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetDeviceFocus(c *xgb.Conn, Focus xproto.Window, Time xproto.Timestamp, RevertTo byte, DeviceId byte) SetDeviceFocusCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'SetDeviceFocus' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setDeviceFocusRequest(c, Focus, Time, RevertTo, DeviceId), cookie)
 	return SetDeviceFocusCookie{cookie}
@@ -6215,6 +6338,9 @@ func SetDeviceFocus(c *xgb.Conn, Focus xproto.Window, Time xproto.Timestamp, Rev
 // SetDeviceFocusChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetDeviceFocusCookie.Check()
 func SetDeviceFocusChecked(c *xgb.Conn, Focus xproto.Window, Time xproto.Timestamp, RevertTo byte, DeviceId byte) SetDeviceFocusCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'SetDeviceFocus' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setDeviceFocusRequest(c, Focus, Time, RevertTo, DeviceId), cookie)
 	return SetDeviceFocusCookie{cookie}
@@ -6265,6 +6391,9 @@ type GetFeedbackControlCookie struct {
 // GetFeedbackControl sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetFeedbackControlCookie.Reply()
 func GetFeedbackControl(c *xgb.Conn, DeviceId byte) GetFeedbackControlCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetFeedbackControl' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getFeedbackControlRequest(c, DeviceId), cookie)
 	return GetFeedbackControlCookie{cookie}
@@ -6273,6 +6402,9 @@ func GetFeedbackControl(c *xgb.Conn, DeviceId byte) GetFeedbackControlCookie {
 // GetFeedbackControlUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetFeedbackControlUnchecked(c *xgb.Conn, DeviceId byte) GetFeedbackControlCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetFeedbackControl' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getFeedbackControlRequest(c, DeviceId), cookie)
 	return GetFeedbackControlCookie{cookie}
@@ -6352,6 +6484,9 @@ type GetDeviceKeyMappingCookie struct {
 // GetDeviceKeyMapping sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetDeviceKeyMappingCookie.Reply()
 func GetDeviceKeyMapping(c *xgb.Conn, DeviceId byte, FirstKeycode KeyCode, Count byte) GetDeviceKeyMappingCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetDeviceKeyMapping' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getDeviceKeyMappingRequest(c, DeviceId, FirstKeycode, Count), cookie)
 	return GetDeviceKeyMappingCookie{cookie}
@@ -6360,6 +6495,9 @@ func GetDeviceKeyMapping(c *xgb.Conn, DeviceId byte, FirstKeycode KeyCode, Count
 // GetDeviceKeyMappingUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetDeviceKeyMappingUnchecked(c *xgb.Conn, DeviceId byte, FirstKeycode KeyCode, Count byte) GetDeviceKeyMappingCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetDeviceKeyMapping' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getDeviceKeyMappingRequest(c, DeviceId, FirstKeycode, Count), cookie)
 	return GetDeviceKeyMappingCookie{cookie}
@@ -6451,6 +6589,9 @@ type ChangeDeviceKeyMappingCookie struct {
 // ChangeDeviceKeyMapping sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ChangeDeviceKeyMapping(c *xgb.Conn, DeviceId byte, FirstKeycode KeyCode, KeysymsPerKeycode byte, KeycodeCount byte, Keysyms []xproto.Keysym) ChangeDeviceKeyMappingCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'ChangeDeviceKeyMapping' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(changeDeviceKeyMappingRequest(c, DeviceId, FirstKeycode, KeysymsPerKeycode, KeycodeCount, Keysyms), cookie)
 	return ChangeDeviceKeyMappingCookie{cookie}
@@ -6459,6 +6600,9 @@ func ChangeDeviceKeyMapping(c *xgb.Conn, DeviceId byte, FirstKeycode KeyCode, Ke
 // ChangeDeviceKeyMappingChecked sends a checked request.
 // If an error occurs, it can be retrieved using ChangeDeviceKeyMappingCookie.Check()
 func ChangeDeviceKeyMappingChecked(c *xgb.Conn, DeviceId byte, FirstKeycode KeyCode, KeysymsPerKeycode byte, KeycodeCount byte, Keysyms []xproto.Keysym) ChangeDeviceKeyMappingCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'ChangeDeviceKeyMapping' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(changeDeviceKeyMappingRequest(c, DeviceId, FirstKeycode, KeysymsPerKeycode, KeycodeCount, Keysyms), cookie)
 	return ChangeDeviceKeyMappingCookie{cookie}
@@ -6515,6 +6659,9 @@ type GetDeviceModifierMappingCookie struct {
 // GetDeviceModifierMapping sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetDeviceModifierMappingCookie.Reply()
 func GetDeviceModifierMapping(c *xgb.Conn, DeviceId byte) GetDeviceModifierMappingCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetDeviceModifierMapping' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getDeviceModifierMappingRequest(c, DeviceId), cookie)
 	return GetDeviceModifierMappingCookie{cookie}
@@ -6523,6 +6670,9 @@ func GetDeviceModifierMapping(c *xgb.Conn, DeviceId byte) GetDeviceModifierMappi
 // GetDeviceModifierMappingUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetDeviceModifierMappingUnchecked(c *xgb.Conn, DeviceId byte) GetDeviceModifierMappingCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetDeviceModifierMapping' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getDeviceModifierMappingRequest(c, DeviceId), cookie)
 	return GetDeviceModifierMappingCookie{cookie}
@@ -6607,6 +6757,9 @@ type SetDeviceModifierMappingCookie struct {
 // SetDeviceModifierMapping sends a checked request.
 // If an error occurs, it will be returned with the reply by calling SetDeviceModifierMappingCookie.Reply()
 func SetDeviceModifierMapping(c *xgb.Conn, DeviceId byte, KeycodesPerModifier byte, Keymaps []byte) SetDeviceModifierMappingCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'SetDeviceModifierMapping' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(setDeviceModifierMappingRequest(c, DeviceId, KeycodesPerModifier, Keymaps), cookie)
 	return SetDeviceModifierMappingCookie{cookie}
@@ -6615,6 +6768,9 @@ func SetDeviceModifierMapping(c *xgb.Conn, DeviceId byte, KeycodesPerModifier by
 // SetDeviceModifierMappingUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetDeviceModifierMappingUnchecked(c *xgb.Conn, DeviceId byte, KeycodesPerModifier byte, Keymaps []byte) SetDeviceModifierMappingCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'SetDeviceModifierMapping' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(setDeviceModifierMappingRequest(c, DeviceId, KeycodesPerModifier, Keymaps), cookie)
 	return SetDeviceModifierMappingCookie{cookie}
@@ -6700,6 +6856,9 @@ type GetDeviceButtonMappingCookie struct {
 // GetDeviceButtonMapping sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetDeviceButtonMappingCookie.Reply()
 func GetDeviceButtonMapping(c *xgb.Conn, DeviceId byte) GetDeviceButtonMappingCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetDeviceButtonMapping' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getDeviceButtonMappingRequest(c, DeviceId), cookie)
 	return GetDeviceButtonMappingCookie{cookie}
@@ -6708,6 +6867,9 @@ func GetDeviceButtonMapping(c *xgb.Conn, DeviceId byte) GetDeviceButtonMappingCo
 // GetDeviceButtonMappingUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetDeviceButtonMappingUnchecked(c *xgb.Conn, DeviceId byte) GetDeviceButtonMappingCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetDeviceButtonMapping' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getDeviceButtonMappingRequest(c, DeviceId), cookie)
 	return GetDeviceButtonMappingCookie{cookie}
@@ -6792,6 +6954,9 @@ type SetDeviceButtonMappingCookie struct {
 // SetDeviceButtonMapping sends a checked request.
 // If an error occurs, it will be returned with the reply by calling SetDeviceButtonMappingCookie.Reply()
 func SetDeviceButtonMapping(c *xgb.Conn, DeviceId byte, MapSize byte, Map []byte) SetDeviceButtonMappingCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'SetDeviceButtonMapping' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(setDeviceButtonMappingRequest(c, DeviceId, MapSize, Map), cookie)
 	return SetDeviceButtonMappingCookie{cookie}
@@ -6800,6 +6965,9 @@ func SetDeviceButtonMapping(c *xgb.Conn, DeviceId byte, MapSize byte, Map []byte
 // SetDeviceButtonMappingUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetDeviceButtonMappingUnchecked(c *xgb.Conn, DeviceId byte, MapSize byte, Map []byte) SetDeviceButtonMappingCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'SetDeviceButtonMapping' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(setDeviceButtonMappingRequest(c, DeviceId, MapSize, Map), cookie)
 	return SetDeviceButtonMappingCookie{cookie}
@@ -6885,6 +7053,9 @@ type QueryDeviceStateCookie struct {
 // QueryDeviceState sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryDeviceStateCookie.Reply()
 func QueryDeviceState(c *xgb.Conn, DeviceId byte) QueryDeviceStateCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'QueryDeviceState' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryDeviceStateRequest(c, DeviceId), cookie)
 	return QueryDeviceStateCookie{cookie}
@@ -6893,6 +7064,9 @@ func QueryDeviceState(c *xgb.Conn, DeviceId byte) QueryDeviceStateCookie {
 // QueryDeviceStateUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryDeviceStateUnchecked(c *xgb.Conn, DeviceId byte) QueryDeviceStateCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'QueryDeviceState' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryDeviceStateRequest(c, DeviceId), cookie)
 	return QueryDeviceStateCookie{cookie}
@@ -6972,6 +7146,9 @@ type SendExtensionEventCookie struct {
 // SendExtensionEvent sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SendExtensionEvent(c *xgb.Conn, Destination xproto.Window, DeviceId byte, Propagate bool, NumClasses uint16, NumEvents byte, Events string, Classes []EventClass) SendExtensionEventCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'SendExtensionEvent' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(sendExtensionEventRequest(c, Destination, DeviceId, Propagate, NumClasses, NumEvents, Events, Classes), cookie)
 	return SendExtensionEventCookie{cookie}
@@ -6980,6 +7157,9 @@ func SendExtensionEvent(c *xgb.Conn, Destination xproto.Window, DeviceId byte, P
 // SendExtensionEventChecked sends a checked request.
 // If an error occurs, it can be retrieved using SendExtensionEventCookie.Check()
 func SendExtensionEventChecked(c *xgb.Conn, Destination xproto.Window, DeviceId byte, Propagate bool, NumClasses uint16, NumEvents byte, Events string, Classes []EventClass) SendExtensionEventCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'SendExtensionEvent' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(sendExtensionEventRequest(c, Destination, DeviceId, Propagate, NumClasses, NumEvents, Events, Classes), cookie)
 	return SendExtensionEventCookie{cookie}
@@ -7048,6 +7228,9 @@ type DeviceBellCookie struct {
 // DeviceBell sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func DeviceBell(c *xgb.Conn, DeviceId byte, FeedbackId byte, FeedbackClass byte, Percent int8) DeviceBellCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'DeviceBell' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(deviceBellRequest(c, DeviceId, FeedbackId, FeedbackClass, Percent), cookie)
 	return DeviceBellCookie{cookie}
@@ -7056,6 +7239,9 @@ func DeviceBell(c *xgb.Conn, DeviceId byte, FeedbackId byte, FeedbackClass byte,
 // DeviceBellChecked sends a checked request.
 // If an error occurs, it can be retrieved using DeviceBellCookie.Check()
 func DeviceBellChecked(c *xgb.Conn, DeviceId byte, FeedbackId byte, FeedbackClass byte, Percent int8) DeviceBellCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'DeviceBell' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(deviceBellRequest(c, DeviceId, FeedbackId, FeedbackClass, Percent), cookie)
 	return DeviceBellCookie{cookie}
@@ -7106,6 +7292,9 @@ type SetDeviceValuatorsCookie struct {
 // SetDeviceValuators sends a checked request.
 // If an error occurs, it will be returned with the reply by calling SetDeviceValuatorsCookie.Reply()
 func SetDeviceValuators(c *xgb.Conn, DeviceId byte, FirstValuator byte, NumValuators byte, Valuators []int32) SetDeviceValuatorsCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'SetDeviceValuators' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(setDeviceValuatorsRequest(c, DeviceId, FirstValuator, NumValuators, Valuators), cookie)
 	return SetDeviceValuatorsCookie{cookie}
@@ -7114,6 +7303,9 @@ func SetDeviceValuators(c *xgb.Conn, DeviceId byte, FirstValuator byte, NumValua
 // SetDeviceValuatorsUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetDeviceValuatorsUnchecked(c *xgb.Conn, DeviceId byte, FirstValuator byte, NumValuators byte, Valuators []int32) SetDeviceValuatorsCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'SetDeviceValuators' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(setDeviceValuatorsRequest(c, DeviceId, FirstValuator, NumValuators, Valuators), cookie)
 	return SetDeviceValuatorsCookie{cookie}
@@ -7205,6 +7397,9 @@ type GetDeviceControlCookie struct {
 // GetDeviceControl sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetDeviceControlCookie.Reply()
 func GetDeviceControl(c *xgb.Conn, ControlId uint16, DeviceId byte) GetDeviceControlCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetDeviceControl' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getDeviceControlRequest(c, ControlId, DeviceId), cookie)
 	return GetDeviceControlCookie{cookie}
@@ -7213,6 +7408,9 @@ func GetDeviceControl(c *xgb.Conn, ControlId uint16, DeviceId byte) GetDeviceCon
 // GetDeviceControlUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetDeviceControlUnchecked(c *xgb.Conn, ControlId uint16, DeviceId byte) GetDeviceControlCookie {
+	if _, ok := c.Extensions["XINPUTEXTENSION"]; !ok {
+		panic("Cannot issue request 'GetDeviceControl' using the uninitialized extension 'XInputExtension'. xinput.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getDeviceControlRequest(c, ControlId, DeviceId), cookie)
 	return GetDeviceControlCookie{cookie}
diff --git a/nexgb/xprint/xprint.go b/nexgb/xprint/xprint.go
index 9f4bd6b..8e6f470 100644
--- a/nexgb/xprint/xprint.go
+++ b/nexgb/xprint/xprint.go
@@ -2,7 +2,7 @@
 package xprint
 
 /*
-	This file was generated by xprint.xml on May 11 2012 1:58:37am EDT.
+	This file was generated by xprint.xml on May 11 2012 11:57:20pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -40,6 +40,16 @@ func init() {
 	xgb.NewExtErrorFuncs["XpExtension"] = make(map[int]xgb.NewErrorFun)
 }
 
+// Skipping definition for base type 'Char'
+
+// Skipping definition for base type 'Card32'
+
+// Skipping definition for base type 'Double'
+
+// Skipping definition for base type 'Bool'
+
+// Skipping definition for base type 'Float'
+
 // Skipping definition for base type 'Card8'
 
 // Skipping definition for base type 'Int16'
@@ -54,16 +64,6 @@ func init() {
 
 // Skipping definition for base type 'Card16'
 
-// Skipping definition for base type 'Char'
-
-// Skipping definition for base type 'Card32'
-
-// Skipping definition for base type 'Double'
-
-// Skipping definition for base type 'Bool'
-
-// Skipping definition for base type 'Float'
-
 const (
 	GetDocFinished       = 0
 	GetDocSecondConsumer = 1
@@ -445,6 +445,9 @@ type PrintQueryVersionCookie struct {
 // PrintQueryVersion sends a checked request.
 // If an error occurs, it will be returned with the reply by calling PrintQueryVersionCookie.Reply()
 func PrintQueryVersion(c *xgb.Conn) PrintQueryVersionCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintQueryVersion' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(printQueryVersionRequest(c), cookie)
 	return PrintQueryVersionCookie{cookie}
@@ -453,6 +456,9 @@ func PrintQueryVersion(c *xgb.Conn) PrintQueryVersionCookie {
 // PrintQueryVersionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PrintQueryVersionUnchecked(c *xgb.Conn) PrintQueryVersionCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintQueryVersion' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(printQueryVersionRequest(c), cookie)
 	return PrintQueryVersionCookie{cookie}
@@ -528,6 +534,9 @@ type PrintGetPrinterListCookie struct {
 // PrintGetPrinterList sends a checked request.
 // If an error occurs, it will be returned with the reply by calling PrintGetPrinterListCookie.Reply()
 func PrintGetPrinterList(c *xgb.Conn, PrinterNameLen uint32, LocaleLen uint32, PrinterName []String8, Locale []String8) PrintGetPrinterListCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintGetPrinterList' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(printGetPrinterListRequest(c, PrinterNameLen, LocaleLen, PrinterName, Locale), cookie)
 	return PrintGetPrinterListCookie{cookie}
@@ -536,6 +545,9 @@ func PrintGetPrinterList(c *xgb.Conn, PrinterNameLen uint32, LocaleLen uint32, P
 // PrintGetPrinterListUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PrintGetPrinterListUnchecked(c *xgb.Conn, PrinterNameLen uint32, LocaleLen uint32, PrinterName []String8, Locale []String8) PrintGetPrinterListCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintGetPrinterList' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(printGetPrinterListRequest(c, PrinterNameLen, LocaleLen, PrinterName, Locale), cookie)
 	return PrintGetPrinterListCookie{cookie}
@@ -632,6 +644,9 @@ type PrintRehashPrinterListCookie struct {
 // PrintRehashPrinterList sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PrintRehashPrinterList(c *xgb.Conn) PrintRehashPrinterListCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintRehashPrinterList' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(printRehashPrinterListRequest(c), cookie)
 	return PrintRehashPrinterListCookie{cookie}
@@ -640,6 +655,9 @@ func PrintRehashPrinterList(c *xgb.Conn) PrintRehashPrinterListCookie {
 // PrintRehashPrinterListChecked sends a checked request.
 // If an error occurs, it can be retrieved using PrintRehashPrinterListCookie.Check()
 func PrintRehashPrinterListChecked(c *xgb.Conn) PrintRehashPrinterListCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintRehashPrinterList' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(printRehashPrinterListRequest(c), cookie)
 	return PrintRehashPrinterListCookie{cookie}
@@ -678,6 +696,9 @@ type CreateContextCookie struct {
 // CreateContext sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateContext(c *xgb.Conn, ContextId uint32, PrinterNameLen uint32, LocaleLen uint32, PrinterName []String8, Locale []String8) CreateContextCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'CreateContext' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(createContextRequest(c, ContextId, PrinterNameLen, LocaleLen, PrinterName, Locale), cookie)
 	return CreateContextCookie{cookie}
@@ -686,6 +707,9 @@ func CreateContext(c *xgb.Conn, ContextId uint32, PrinterNameLen uint32, LocaleL
 // CreateContextChecked sends a checked request.
 // If an error occurs, it can be retrieved using CreateContextCookie.Check()
 func CreateContextChecked(c *xgb.Conn, ContextId uint32, PrinterNameLen uint32, LocaleLen uint32, PrinterName []String8, Locale []String8) CreateContextCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'CreateContext' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(createContextRequest(c, ContextId, PrinterNameLen, LocaleLen, PrinterName, Locale), cookie)
 	return CreateContextCookie{cookie}
@@ -745,6 +769,9 @@ type PrintSetContextCookie struct {
 // PrintSetContext sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PrintSetContext(c *xgb.Conn, Context uint32) PrintSetContextCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintSetContext' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(printSetContextRequest(c, Context), cookie)
 	return PrintSetContextCookie{cookie}
@@ -753,6 +780,9 @@ func PrintSetContext(c *xgb.Conn, Context uint32) PrintSetContextCookie {
 // PrintSetContextChecked sends a checked request.
 // If an error occurs, it can be retrieved using PrintSetContextCookie.Check()
 func PrintSetContextChecked(c *xgb.Conn, Context uint32) PrintSetContextCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintSetContext' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(printSetContextRequest(c, Context), cookie)
 	return PrintSetContextCookie{cookie}
@@ -794,6 +824,9 @@ type PrintGetContextCookie struct {
 // PrintGetContext sends a checked request.
 // If an error occurs, it will be returned with the reply by calling PrintGetContextCookie.Reply()
 func PrintGetContext(c *xgb.Conn) PrintGetContextCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintGetContext' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(printGetContextRequest(c), cookie)
 	return PrintGetContextCookie{cookie}
@@ -802,6 +835,9 @@ func PrintGetContext(c *xgb.Conn) PrintGetContextCookie {
 // PrintGetContextUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PrintGetContextUnchecked(c *xgb.Conn) PrintGetContextCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintGetContext' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(printGetContextRequest(c), cookie)
 	return PrintGetContextCookie{cookie}
@@ -873,6 +909,9 @@ type PrintDestroyContextCookie struct {
 // PrintDestroyContext sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PrintDestroyContext(c *xgb.Conn, Context uint32) PrintDestroyContextCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintDestroyContext' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(printDestroyContextRequest(c, Context), cookie)
 	return PrintDestroyContextCookie{cookie}
@@ -881,6 +920,9 @@ func PrintDestroyContext(c *xgb.Conn, Context uint32) PrintDestroyContextCookie
 // PrintDestroyContextChecked sends a checked request.
 // If an error occurs, it can be retrieved using PrintDestroyContextCookie.Check()
 func PrintDestroyContextChecked(c *xgb.Conn, Context uint32) PrintDestroyContextCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintDestroyContext' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(printDestroyContextRequest(c, Context), cookie)
 	return PrintDestroyContextCookie{cookie}
@@ -922,6 +964,9 @@ type PrintGetScreenOfContextCookie struct {
 // PrintGetScreenOfContext sends a checked request.
 // If an error occurs, it will be returned with the reply by calling PrintGetScreenOfContextCookie.Reply()
 func PrintGetScreenOfContext(c *xgb.Conn) PrintGetScreenOfContextCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintGetScreenOfContext' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(printGetScreenOfContextRequest(c), cookie)
 	return PrintGetScreenOfContextCookie{cookie}
@@ -930,6 +975,9 @@ func PrintGetScreenOfContext(c *xgb.Conn) PrintGetScreenOfContextCookie {
 // PrintGetScreenOfContextUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PrintGetScreenOfContextUnchecked(c *xgb.Conn) PrintGetScreenOfContextCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintGetScreenOfContext' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(printGetScreenOfContextRequest(c), cookie)
 	return PrintGetScreenOfContextCookie{cookie}
@@ -1001,6 +1049,9 @@ type PrintStartJobCookie struct {
 // PrintStartJob sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PrintStartJob(c *xgb.Conn, OutputMode byte) PrintStartJobCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintStartJob' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(printStartJobRequest(c, OutputMode), cookie)
 	return PrintStartJobCookie{cookie}
@@ -1009,6 +1060,9 @@ func PrintStartJob(c *xgb.Conn, OutputMode byte) PrintStartJobCookie {
 // PrintStartJobChecked sends a checked request.
 // If an error occurs, it can be retrieved using PrintStartJobCookie.Check()
 func PrintStartJobChecked(c *xgb.Conn, OutputMode byte) PrintStartJobCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintStartJob' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(printStartJobRequest(c, OutputMode), cookie)
 	return PrintStartJobCookie{cookie}
@@ -1050,6 +1104,9 @@ type PrintEndJobCookie struct {
 // PrintEndJob sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PrintEndJob(c *xgb.Conn, Cancel bool) PrintEndJobCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintEndJob' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(printEndJobRequest(c, Cancel), cookie)
 	return PrintEndJobCookie{cookie}
@@ -1058,6 +1115,9 @@ func PrintEndJob(c *xgb.Conn, Cancel bool) PrintEndJobCookie {
 // PrintEndJobChecked sends a checked request.
 // If an error occurs, it can be retrieved using PrintEndJobCookie.Check()
 func PrintEndJobChecked(c *xgb.Conn, Cancel bool) PrintEndJobCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintEndJob' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(printEndJobRequest(c, Cancel), cookie)
 	return PrintEndJobCookie{cookie}
@@ -1103,6 +1163,9 @@ type PrintStartDocCookie struct {
 // PrintStartDoc sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PrintStartDoc(c *xgb.Conn, DriverMode byte) PrintStartDocCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintStartDoc' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(printStartDocRequest(c, DriverMode), cookie)
 	return PrintStartDocCookie{cookie}
@@ -1111,6 +1174,9 @@ func PrintStartDoc(c *xgb.Conn, DriverMode byte) PrintStartDocCookie {
 // PrintStartDocChecked sends a checked request.
 // If an error occurs, it can be retrieved using PrintStartDocCookie.Check()
 func PrintStartDocChecked(c *xgb.Conn, DriverMode byte) PrintStartDocCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintStartDoc' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(printStartDocRequest(c, DriverMode), cookie)
 	return PrintStartDocCookie{cookie}
@@ -1152,6 +1218,9 @@ type PrintEndDocCookie struct {
 // PrintEndDoc sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PrintEndDoc(c *xgb.Conn, Cancel bool) PrintEndDocCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintEndDoc' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(printEndDocRequest(c, Cancel), cookie)
 	return PrintEndDocCookie{cookie}
@@ -1160,6 +1229,9 @@ func PrintEndDoc(c *xgb.Conn, Cancel bool) PrintEndDocCookie {
 // PrintEndDocChecked sends a checked request.
 // If an error occurs, it can be retrieved using PrintEndDocCookie.Check()
 func PrintEndDocChecked(c *xgb.Conn, Cancel bool) PrintEndDocCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintEndDoc' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(printEndDocRequest(c, Cancel), cookie)
 	return PrintEndDocCookie{cookie}
@@ -1205,6 +1277,9 @@ type PrintPutDocumentDataCookie struct {
 // PrintPutDocumentData sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PrintPutDocumentData(c *xgb.Conn, Drawable xproto.Drawable, LenData uint32, LenFmt uint16, LenOptions uint16, Data []byte, DocFormat []String8, Options []String8) PrintPutDocumentDataCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintPutDocumentData' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(printPutDocumentDataRequest(c, Drawable, LenData, LenFmt, LenOptions, Data, DocFormat, Options), cookie)
 	return PrintPutDocumentDataCookie{cookie}
@@ -1213,6 +1288,9 @@ func PrintPutDocumentData(c *xgb.Conn, Drawable xproto.Drawable, LenData uint32,
 // PrintPutDocumentDataChecked sends a checked request.
 // If an error occurs, it can be retrieved using PrintPutDocumentDataCookie.Check()
 func PrintPutDocumentDataChecked(c *xgb.Conn, Drawable xproto.Drawable, LenData uint32, LenFmt uint16, LenOptions uint16, Data []byte, DocFormat []String8, Options []String8) PrintPutDocumentDataCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintPutDocumentData' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(printPutDocumentDataRequest(c, Drawable, LenData, LenFmt, LenOptions, Data, DocFormat, Options), cookie)
 	return PrintPutDocumentDataCookie{cookie}
@@ -1278,6 +1356,9 @@ type PrintGetDocumentDataCookie struct {
 // PrintGetDocumentData sends a checked request.
 // If an error occurs, it will be returned with the reply by calling PrintGetDocumentDataCookie.Reply()
 func PrintGetDocumentData(c *xgb.Conn, Context Pcontext, MaxBytes uint32) PrintGetDocumentDataCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintGetDocumentData' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(printGetDocumentDataRequest(c, Context, MaxBytes), cookie)
 	return PrintGetDocumentDataCookie{cookie}
@@ -1286,6 +1367,9 @@ func PrintGetDocumentData(c *xgb.Conn, Context Pcontext, MaxBytes uint32) PrintG
 // PrintGetDocumentDataUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PrintGetDocumentDataUnchecked(c *xgb.Conn, Context Pcontext, MaxBytes uint32) PrintGetDocumentDataCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintGetDocumentData' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(printGetDocumentDataRequest(c, Context, MaxBytes), cookie)
 	return PrintGetDocumentDataCookie{cookie}
@@ -1379,6 +1463,9 @@ type PrintStartPageCookie struct {
 // PrintStartPage sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PrintStartPage(c *xgb.Conn, Window xproto.Window) PrintStartPageCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintStartPage' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(printStartPageRequest(c, Window), cookie)
 	return PrintStartPageCookie{cookie}
@@ -1387,6 +1474,9 @@ func PrintStartPage(c *xgb.Conn, Window xproto.Window) PrintStartPageCookie {
 // PrintStartPageChecked sends a checked request.
 // If an error occurs, it can be retrieved using PrintStartPageCookie.Check()
 func PrintStartPageChecked(c *xgb.Conn, Window xproto.Window) PrintStartPageCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintStartPage' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(printStartPageRequest(c, Window), cookie)
 	return PrintStartPageCookie{cookie}
@@ -1428,6 +1518,9 @@ type PrintEndPageCookie struct {
 // PrintEndPage sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PrintEndPage(c *xgb.Conn, Cancel bool) PrintEndPageCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintEndPage' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(printEndPageRequest(c, Cancel), cookie)
 	return PrintEndPageCookie{cookie}
@@ -1436,6 +1529,9 @@ func PrintEndPage(c *xgb.Conn, Cancel bool) PrintEndPageCookie {
 // PrintEndPageChecked sends a checked request.
 // If an error occurs, it can be retrieved using PrintEndPageCookie.Check()
 func PrintEndPageChecked(c *xgb.Conn, Cancel bool) PrintEndPageCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintEndPage' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(printEndPageRequest(c, Cancel), cookie)
 	return PrintEndPageCookie{cookie}
@@ -1483,6 +1579,9 @@ type PrintSelectInputCookie struct {
 // PrintSelectInput sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PrintSelectInput(c *xgb.Conn, Context Pcontext, EventMask uint32, EventList []uint32) PrintSelectInputCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintSelectInput' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(printSelectInputRequest(c, Context, EventMask, EventList), cookie)
 	return PrintSelectInputCookie{cookie}
@@ -1491,6 +1590,9 @@ func PrintSelectInput(c *xgb.Conn, Context Pcontext, EventMask uint32, EventList
 // PrintSelectInputChecked sends a checked request.
 // If an error occurs, it can be retrieved using PrintSelectInputCookie.Check()
 func PrintSelectInputChecked(c *xgb.Conn, Context Pcontext, EventMask uint32, EventList []uint32) PrintSelectInputCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintSelectInput' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(printSelectInputRequest(c, Context, EventMask, EventList), cookie)
 	return PrintSelectInputCookie{cookie}
@@ -1540,6 +1642,9 @@ type PrintInputSelectedCookie struct {
 // PrintInputSelected sends a checked request.
 // If an error occurs, it will be returned with the reply by calling PrintInputSelectedCookie.Reply()
 func PrintInputSelected(c *xgb.Conn, Context Pcontext) PrintInputSelectedCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintInputSelected' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(printInputSelectedRequest(c, Context), cookie)
 	return PrintInputSelectedCookie{cookie}
@@ -1548,6 +1653,9 @@ func PrintInputSelected(c *xgb.Conn, Context Pcontext) PrintInputSelectedCookie
 // PrintInputSelectedUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PrintInputSelectedUnchecked(c *xgb.Conn, Context Pcontext) PrintInputSelectedCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintInputSelected' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(printInputSelectedRequest(c, Context), cookie)
 	return PrintInputSelectedCookie{cookie}
@@ -1642,6 +1750,9 @@ type PrintGetAttributesCookie struct {
 // PrintGetAttributes sends a checked request.
 // If an error occurs, it will be returned with the reply by calling PrintGetAttributesCookie.Reply()
 func PrintGetAttributes(c *xgb.Conn, Context Pcontext, Pool byte) PrintGetAttributesCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintGetAttributes' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(printGetAttributesRequest(c, Context, Pool), cookie)
 	return PrintGetAttributesCookie{cookie}
@@ -1650,6 +1761,9 @@ func PrintGetAttributes(c *xgb.Conn, Context Pcontext, Pool byte) PrintGetAttrib
 // PrintGetAttributesUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PrintGetAttributesUnchecked(c *xgb.Conn, Context Pcontext, Pool byte) PrintGetAttributesCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintGetAttributes' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(printGetAttributesRequest(c, Context, Pool), cookie)
 	return PrintGetAttributesCookie{cookie}
@@ -1736,6 +1850,9 @@ type PrintGetOneAttributesCookie struct {
 // PrintGetOneAttributes sends a checked request.
 // If an error occurs, it will be returned with the reply by calling PrintGetOneAttributesCookie.Reply()
 func PrintGetOneAttributes(c *xgb.Conn, Context Pcontext, NameLen uint32, Pool byte, Name []String8) PrintGetOneAttributesCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintGetOneAttributes' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(printGetOneAttributesRequest(c, Context, NameLen, Pool, Name), cookie)
 	return PrintGetOneAttributesCookie{cookie}
@@ -1744,6 +1861,9 @@ func PrintGetOneAttributes(c *xgb.Conn, Context Pcontext, NameLen uint32, Pool b
 // PrintGetOneAttributesUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PrintGetOneAttributesUnchecked(c *xgb.Conn, Context Pcontext, NameLen uint32, Pool byte, Name []String8) PrintGetOneAttributesCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintGetOneAttributes' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(printGetOneAttributesRequest(c, Context, NameLen, Pool, Name), cookie)
 	return PrintGetOneAttributesCookie{cookie}
@@ -1843,6 +1963,9 @@ type PrintSetAttributesCookie struct {
 // PrintSetAttributes sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PrintSetAttributes(c *xgb.Conn, Context Pcontext, StringLen uint32, Pool byte, Rule byte, Attributes []String8) PrintSetAttributesCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintSetAttributes' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(printSetAttributesRequest(c, Context, StringLen, Pool, Rule, Attributes), cookie)
 	return PrintSetAttributesCookie{cookie}
@@ -1851,6 +1974,9 @@ func PrintSetAttributes(c *xgb.Conn, Context Pcontext, StringLen uint32, Pool by
 // PrintSetAttributesChecked sends a checked request.
 // If an error occurs, it can be retrieved using PrintSetAttributesCookie.Check()
 func PrintSetAttributesChecked(c *xgb.Conn, Context Pcontext, StringLen uint32, Pool byte, Rule byte, Attributes []String8) PrintSetAttributesCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintSetAttributes' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(printSetAttributesRequest(c, Context, StringLen, Pool, Rule, Attributes), cookie)
 	return PrintSetAttributesCookie{cookie}
@@ -1909,6 +2035,9 @@ type PrintGetPageDimensionsCookie struct {
 // PrintGetPageDimensions sends a checked request.
 // If an error occurs, it will be returned with the reply by calling PrintGetPageDimensionsCookie.Reply()
 func PrintGetPageDimensions(c *xgb.Conn, Context Pcontext) PrintGetPageDimensionsCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintGetPageDimensions' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(printGetPageDimensionsRequest(c, Context), cookie)
 	return PrintGetPageDimensionsCookie{cookie}
@@ -1917,6 +2046,9 @@ func PrintGetPageDimensions(c *xgb.Conn, Context Pcontext) PrintGetPageDimension
 // PrintGetPageDimensionsUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PrintGetPageDimensionsUnchecked(c *xgb.Conn, Context Pcontext) PrintGetPageDimensionsCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintGetPageDimensions' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(printGetPageDimensionsRequest(c, Context), cookie)
 	return PrintGetPageDimensionsCookie{cookie}
@@ -2011,6 +2143,9 @@ type PrintQueryScreensCookie struct {
 // PrintQueryScreens sends a checked request.
 // If an error occurs, it will be returned with the reply by calling PrintQueryScreensCookie.Reply()
 func PrintQueryScreens(c *xgb.Conn) PrintQueryScreensCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintQueryScreens' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(printQueryScreensRequest(c), cookie)
 	return PrintQueryScreensCookie{cookie}
@@ -2019,6 +2154,9 @@ func PrintQueryScreens(c *xgb.Conn) PrintQueryScreensCookie {
 // PrintQueryScreensUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PrintQueryScreensUnchecked(c *xgb.Conn) PrintQueryScreensCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintQueryScreens' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(printQueryScreensRequest(c), cookie)
 	return PrintQueryScreensCookie{cookie}
@@ -2101,6 +2239,9 @@ type PrintSetImageResolutionCookie struct {
 // PrintSetImageResolution sends a checked request.
 // If an error occurs, it will be returned with the reply by calling PrintSetImageResolutionCookie.Reply()
 func PrintSetImageResolution(c *xgb.Conn, Context Pcontext, ImageResolution uint16) PrintSetImageResolutionCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintSetImageResolution' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(printSetImageResolutionRequest(c, Context, ImageResolution), cookie)
 	return PrintSetImageResolutionCookie{cookie}
@@ -2109,6 +2250,9 @@ func PrintSetImageResolution(c *xgb.Conn, Context Pcontext, ImageResolution uint
 // PrintSetImageResolutionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PrintSetImageResolutionUnchecked(c *xgb.Conn, Context Pcontext, ImageResolution uint16) PrintSetImageResolutionCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintSetImageResolution' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(printSetImageResolutionRequest(c, Context, ImageResolution), cookie)
 	return PrintSetImageResolutionCookie{cookie}
@@ -2191,6 +2335,9 @@ type PrintGetImageResolutionCookie struct {
 // PrintGetImageResolution sends a checked request.
 // If an error occurs, it will be returned with the reply by calling PrintGetImageResolutionCookie.Reply()
 func PrintGetImageResolution(c *xgb.Conn, Context Pcontext) PrintGetImageResolutionCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintGetImageResolution' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(printGetImageResolutionRequest(c, Context), cookie)
 	return PrintGetImageResolutionCookie{cookie}
@@ -2199,6 +2346,9 @@ func PrintGetImageResolution(c *xgb.Conn, Context Pcontext) PrintGetImageResolut
 // PrintGetImageResolutionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PrintGetImageResolutionUnchecked(c *xgb.Conn, Context Pcontext) PrintGetImageResolutionCookie {
+	if _, ok := c.Extensions["XPEXTENSION"]; !ok {
+		panic("Cannot issue request 'PrintGetImageResolution' using the uninitialized extension 'XpExtension'. xprint.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(printGetImageResolutionRequest(c, Context), cookie)
 	return PrintGetImageResolutionCookie{cookie}
diff --git a/nexgb/xproto/xproto.go b/nexgb/xproto/xproto.go
index 5378196..f19e99e 100644
--- a/nexgb/xproto/xproto.go
+++ b/nexgb/xproto/xproto.go
@@ -2,7 +2,7 @@
 package xproto
 
 /*
-	This file was generated by xproto.xml on May 11 2012 1:58:37am EDT.
+	This file was generated by xproto.xml on May 11 2012 11:57:20pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -23,14 +23,6 @@ func (s *SetupInfo) DefaultScreen(c *xgb.Conn) *ScreenInfo {
 	return &s.Roots[c.DefaultScreen]
 }
 
-// Skipping definition for base type 'Int16'
-
-// Skipping definition for base type 'Int32'
-
-// Skipping definition for base type 'Void'
-
-// Skipping definition for base type 'Byte'
-
 // Skipping definition for base type 'Int8'
 
 // Skipping definition for base type 'Card16'
@@ -47,6 +39,14 @@ func (s *SetupInfo) DefaultScreen(c *xgb.Conn) *ScreenInfo {
 
 // Skipping definition for base type 'Card8'
 
+// Skipping definition for base type 'Int16'
+
+// Skipping definition for base type 'Int32'
+
+// Skipping definition for base type 'Void'
+
+// Skipping definition for base type 'Byte'
+
 const (
 	VisualClassStaticGray  = 0
 	VisualClassGrayScale   = 1
diff --git a/nexgb/xselinux/xselinux.go b/nexgb/xselinux/xselinux.go
index 10134ff..115feb7 100644
--- a/nexgb/xselinux/xselinux.go
+++ b/nexgb/xselinux/xselinux.go
@@ -2,7 +2,7 @@
 package xselinux
 
 /*
-	This file was generated by xselinux.xml on May 11 2012 1:58:37am EDT.
+	This file was generated by xselinux.xml on May 11 2012 11:57:20pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -40,6 +40,14 @@ func init() {
 	xgb.NewExtErrorFuncs["SELinux"] = make(map[int]xgb.NewErrorFun)
 }
 
+// Skipping definition for base type 'Int32'
+
+// Skipping definition for base type 'Void'
+
+// Skipping definition for base type 'Byte'
+
+// Skipping definition for base type 'Int8'
+
 // Skipping definition for base type 'Card16'
 
 // Skipping definition for base type 'Char'
@@ -56,14 +64,6 @@ func init() {
 
 // Skipping definition for base type 'Int16'
 
-// Skipping definition for base type 'Int32'
-
-// Skipping definition for base type 'Void'
-
-// Skipping definition for base type 'Byte'
-
-// Skipping definition for base type 'Int8'
-
 type ListItem struct {
 	Name             xproto.Atom
 	ObjectContextLen uint32
@@ -164,6 +164,9 @@ type QueryVersionCookie struct {
 // QueryVersion sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryVersionCookie.Reply()
 func QueryVersion(c *xgb.Conn, ClientMajor byte, ClientMinor byte) QueryVersionCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryVersionRequest(c, ClientMajor, ClientMinor), cookie)
 	return QueryVersionCookie{cookie}
@@ -172,6 +175,9 @@ func QueryVersion(c *xgb.Conn, ClientMajor byte, ClientMinor byte) QueryVersionC
 // QueryVersionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryVersionUnchecked(c *xgb.Conn, ClientMajor byte, ClientMinor byte) QueryVersionCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryVersionRequest(c, ClientMajor, ClientMinor), cookie)
 	return QueryVersionCookie{cookie}
@@ -253,6 +259,9 @@ type SetDeviceCreateContextCookie struct {
 // SetDeviceCreateContext sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetDeviceCreateContext(c *xgb.Conn, ContextLen uint32, Context string) SetDeviceCreateContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'SetDeviceCreateContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setDeviceCreateContextRequest(c, ContextLen, Context), cookie)
 	return SetDeviceCreateContextCookie{cookie}
@@ -261,6 +270,9 @@ func SetDeviceCreateContext(c *xgb.Conn, ContextLen uint32, Context string) SetD
 // SetDeviceCreateContextChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetDeviceCreateContextCookie.Check()
 func SetDeviceCreateContextChecked(c *xgb.Conn, ContextLen uint32, Context string) SetDeviceCreateContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'SetDeviceCreateContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setDeviceCreateContextRequest(c, ContextLen, Context), cookie)
 	return SetDeviceCreateContextCookie{cookie}
@@ -305,6 +317,9 @@ type GetDeviceCreateContextCookie struct {
 // GetDeviceCreateContext sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetDeviceCreateContextCookie.Reply()
 func GetDeviceCreateContext(c *xgb.Conn) GetDeviceCreateContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'GetDeviceCreateContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getDeviceCreateContextRequest(c), cookie)
 	return GetDeviceCreateContextCookie{cookie}
@@ -313,6 +328,9 @@ func GetDeviceCreateContext(c *xgb.Conn) GetDeviceCreateContextCookie {
 // GetDeviceCreateContextUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetDeviceCreateContextUnchecked(c *xgb.Conn) GetDeviceCreateContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'GetDeviceCreateContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getDeviceCreateContextRequest(c), cookie)
 	return GetDeviceCreateContextCookie{cookie}
@@ -395,6 +413,9 @@ type SetDeviceContextCookie struct {
 // SetDeviceContext sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetDeviceContext(c *xgb.Conn, Device uint32, ContextLen uint32, Context string) SetDeviceContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'SetDeviceContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setDeviceContextRequest(c, Device, ContextLen, Context), cookie)
 	return SetDeviceContextCookie{cookie}
@@ -403,6 +424,9 @@ func SetDeviceContext(c *xgb.Conn, Device uint32, ContextLen uint32, Context str
 // SetDeviceContextChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetDeviceContextCookie.Check()
 func SetDeviceContextChecked(c *xgb.Conn, Device uint32, ContextLen uint32, Context string) SetDeviceContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'SetDeviceContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setDeviceContextRequest(c, Device, ContextLen, Context), cookie)
 	return SetDeviceContextCookie{cookie}
@@ -450,6 +474,9 @@ type GetDeviceContextCookie struct {
 // GetDeviceContext sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetDeviceContextCookie.Reply()
 func GetDeviceContext(c *xgb.Conn, Device uint32) GetDeviceContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'GetDeviceContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getDeviceContextRequest(c, Device), cookie)
 	return GetDeviceContextCookie{cookie}
@@ -458,6 +485,9 @@ func GetDeviceContext(c *xgb.Conn, Device uint32) GetDeviceContextCookie {
 // GetDeviceContextUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetDeviceContextUnchecked(c *xgb.Conn, Device uint32) GetDeviceContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'GetDeviceContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getDeviceContextRequest(c, Device), cookie)
 	return GetDeviceContextCookie{cookie}
@@ -543,6 +573,9 @@ type SetWindowCreateContextCookie struct {
 // SetWindowCreateContext sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetWindowCreateContext(c *xgb.Conn, ContextLen uint32, Context string) SetWindowCreateContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'SetWindowCreateContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setWindowCreateContextRequest(c, ContextLen, Context), cookie)
 	return SetWindowCreateContextCookie{cookie}
@@ -551,6 +584,9 @@ func SetWindowCreateContext(c *xgb.Conn, ContextLen uint32, Context string) SetW
 // SetWindowCreateContextChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetWindowCreateContextCookie.Check()
 func SetWindowCreateContextChecked(c *xgb.Conn, ContextLen uint32, Context string) SetWindowCreateContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'SetWindowCreateContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setWindowCreateContextRequest(c, ContextLen, Context), cookie)
 	return SetWindowCreateContextCookie{cookie}
@@ -595,6 +631,9 @@ type GetWindowCreateContextCookie struct {
 // GetWindowCreateContext sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetWindowCreateContextCookie.Reply()
 func GetWindowCreateContext(c *xgb.Conn) GetWindowCreateContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'GetWindowCreateContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getWindowCreateContextRequest(c), cookie)
 	return GetWindowCreateContextCookie{cookie}
@@ -603,6 +642,9 @@ func GetWindowCreateContext(c *xgb.Conn) GetWindowCreateContextCookie {
 // GetWindowCreateContextUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetWindowCreateContextUnchecked(c *xgb.Conn) GetWindowCreateContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'GetWindowCreateContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getWindowCreateContextRequest(c), cookie)
 	return GetWindowCreateContextCookie{cookie}
@@ -685,6 +727,9 @@ type GetWindowContextCookie struct {
 // GetWindowContext sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetWindowContextCookie.Reply()
 func GetWindowContext(c *xgb.Conn, Window xproto.Window) GetWindowContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'GetWindowContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getWindowContextRequest(c, Window), cookie)
 	return GetWindowContextCookie{cookie}
@@ -693,6 +738,9 @@ func GetWindowContext(c *xgb.Conn, Window xproto.Window) GetWindowContextCookie
 // GetWindowContextUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetWindowContextUnchecked(c *xgb.Conn, Window xproto.Window) GetWindowContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'GetWindowContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getWindowContextRequest(c, Window), cookie)
 	return GetWindowContextCookie{cookie}
@@ -778,6 +826,9 @@ type SetPropertyCreateContextCookie struct {
 // SetPropertyCreateContext sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetPropertyCreateContext(c *xgb.Conn, ContextLen uint32, Context string) SetPropertyCreateContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'SetPropertyCreateContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setPropertyCreateContextRequest(c, ContextLen, Context), cookie)
 	return SetPropertyCreateContextCookie{cookie}
@@ -786,6 +837,9 @@ func SetPropertyCreateContext(c *xgb.Conn, ContextLen uint32, Context string) Se
 // SetPropertyCreateContextChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetPropertyCreateContextCookie.Check()
 func SetPropertyCreateContextChecked(c *xgb.Conn, ContextLen uint32, Context string) SetPropertyCreateContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'SetPropertyCreateContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setPropertyCreateContextRequest(c, ContextLen, Context), cookie)
 	return SetPropertyCreateContextCookie{cookie}
@@ -830,6 +884,9 @@ type GetPropertyCreateContextCookie struct {
 // GetPropertyCreateContext sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetPropertyCreateContextCookie.Reply()
 func GetPropertyCreateContext(c *xgb.Conn) GetPropertyCreateContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'GetPropertyCreateContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getPropertyCreateContextRequest(c), cookie)
 	return GetPropertyCreateContextCookie{cookie}
@@ -838,6 +895,9 @@ func GetPropertyCreateContext(c *xgb.Conn) GetPropertyCreateContextCookie {
 // GetPropertyCreateContextUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetPropertyCreateContextUnchecked(c *xgb.Conn) GetPropertyCreateContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'GetPropertyCreateContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getPropertyCreateContextRequest(c), cookie)
 	return GetPropertyCreateContextCookie{cookie}
@@ -920,6 +980,9 @@ type SetPropertyUseContextCookie struct {
 // SetPropertyUseContext sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetPropertyUseContext(c *xgb.Conn, ContextLen uint32, Context string) SetPropertyUseContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'SetPropertyUseContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setPropertyUseContextRequest(c, ContextLen, Context), cookie)
 	return SetPropertyUseContextCookie{cookie}
@@ -928,6 +991,9 @@ func SetPropertyUseContext(c *xgb.Conn, ContextLen uint32, Context string) SetPr
 // SetPropertyUseContextChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetPropertyUseContextCookie.Check()
 func SetPropertyUseContextChecked(c *xgb.Conn, ContextLen uint32, Context string) SetPropertyUseContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'SetPropertyUseContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setPropertyUseContextRequest(c, ContextLen, Context), cookie)
 	return SetPropertyUseContextCookie{cookie}
@@ -972,6 +1038,9 @@ type GetPropertyUseContextCookie struct {
 // GetPropertyUseContext sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetPropertyUseContextCookie.Reply()
 func GetPropertyUseContext(c *xgb.Conn) GetPropertyUseContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'GetPropertyUseContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getPropertyUseContextRequest(c), cookie)
 	return GetPropertyUseContextCookie{cookie}
@@ -980,6 +1049,9 @@ func GetPropertyUseContext(c *xgb.Conn) GetPropertyUseContextCookie {
 // GetPropertyUseContextUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetPropertyUseContextUnchecked(c *xgb.Conn) GetPropertyUseContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'GetPropertyUseContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getPropertyUseContextRequest(c), cookie)
 	return GetPropertyUseContextCookie{cookie}
@@ -1062,6 +1134,9 @@ type GetPropertyContextCookie struct {
 // GetPropertyContext sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetPropertyContextCookie.Reply()
 func GetPropertyContext(c *xgb.Conn, Window xproto.Window, Property xproto.Atom) GetPropertyContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'GetPropertyContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getPropertyContextRequest(c, Window, Property), cookie)
 	return GetPropertyContextCookie{cookie}
@@ -1070,6 +1145,9 @@ func GetPropertyContext(c *xgb.Conn, Window xproto.Window, Property xproto.Atom)
 // GetPropertyContextUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetPropertyContextUnchecked(c *xgb.Conn, Window xproto.Window, Property xproto.Atom) GetPropertyContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'GetPropertyContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getPropertyContextRequest(c, Window, Property), cookie)
 	return GetPropertyContextCookie{cookie}
@@ -1158,6 +1236,9 @@ type GetPropertyDataContextCookie struct {
 // GetPropertyDataContext sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetPropertyDataContextCookie.Reply()
 func GetPropertyDataContext(c *xgb.Conn, Window xproto.Window, Property xproto.Atom) GetPropertyDataContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'GetPropertyDataContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getPropertyDataContextRequest(c, Window, Property), cookie)
 	return GetPropertyDataContextCookie{cookie}
@@ -1166,6 +1247,9 @@ func GetPropertyDataContext(c *xgb.Conn, Window xproto.Window, Property xproto.A
 // GetPropertyDataContextUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetPropertyDataContextUnchecked(c *xgb.Conn, Window xproto.Window, Property xproto.Atom) GetPropertyDataContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'GetPropertyDataContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getPropertyDataContextRequest(c, Window, Property), cookie)
 	return GetPropertyDataContextCookie{cookie}
@@ -1254,6 +1338,9 @@ type ListPropertiesCookie struct {
 // ListProperties sends a checked request.
 // If an error occurs, it will be returned with the reply by calling ListPropertiesCookie.Reply()
 func ListProperties(c *xgb.Conn, Window xproto.Window) ListPropertiesCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'ListProperties' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(listPropertiesRequest(c, Window), cookie)
 	return ListPropertiesCookie{cookie}
@@ -1262,6 +1349,9 @@ func ListProperties(c *xgb.Conn, Window xproto.Window) ListPropertiesCookie {
 // ListPropertiesUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ListPropertiesUnchecked(c *xgb.Conn, Window xproto.Window) ListPropertiesCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'ListProperties' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(listPropertiesRequest(c, Window), cookie)
 	return ListPropertiesCookie{cookie}
@@ -1343,6 +1433,9 @@ type SetSelectionCreateContextCookie struct {
 // SetSelectionCreateContext sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetSelectionCreateContext(c *xgb.Conn, ContextLen uint32, Context string) SetSelectionCreateContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'SetSelectionCreateContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setSelectionCreateContextRequest(c, ContextLen, Context), cookie)
 	return SetSelectionCreateContextCookie{cookie}
@@ -1351,6 +1444,9 @@ func SetSelectionCreateContext(c *xgb.Conn, ContextLen uint32, Context string) S
 // SetSelectionCreateContextChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetSelectionCreateContextCookie.Check()
 func SetSelectionCreateContextChecked(c *xgb.Conn, ContextLen uint32, Context string) SetSelectionCreateContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'SetSelectionCreateContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setSelectionCreateContextRequest(c, ContextLen, Context), cookie)
 	return SetSelectionCreateContextCookie{cookie}
@@ -1395,6 +1491,9 @@ type GetSelectionCreateContextCookie struct {
 // GetSelectionCreateContext sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetSelectionCreateContextCookie.Reply()
 func GetSelectionCreateContext(c *xgb.Conn) GetSelectionCreateContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'GetSelectionCreateContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getSelectionCreateContextRequest(c), cookie)
 	return GetSelectionCreateContextCookie{cookie}
@@ -1403,6 +1502,9 @@ func GetSelectionCreateContext(c *xgb.Conn) GetSelectionCreateContextCookie {
 // GetSelectionCreateContextUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetSelectionCreateContextUnchecked(c *xgb.Conn) GetSelectionCreateContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'GetSelectionCreateContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getSelectionCreateContextRequest(c), cookie)
 	return GetSelectionCreateContextCookie{cookie}
@@ -1485,6 +1587,9 @@ type SetSelectionUseContextCookie struct {
 // SetSelectionUseContext sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetSelectionUseContext(c *xgb.Conn, ContextLen uint32, Context string) SetSelectionUseContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'SetSelectionUseContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setSelectionUseContextRequest(c, ContextLen, Context), cookie)
 	return SetSelectionUseContextCookie{cookie}
@@ -1493,6 +1598,9 @@ func SetSelectionUseContext(c *xgb.Conn, ContextLen uint32, Context string) SetS
 // SetSelectionUseContextChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetSelectionUseContextCookie.Check()
 func SetSelectionUseContextChecked(c *xgb.Conn, ContextLen uint32, Context string) SetSelectionUseContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'SetSelectionUseContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setSelectionUseContextRequest(c, ContextLen, Context), cookie)
 	return SetSelectionUseContextCookie{cookie}
@@ -1537,6 +1645,9 @@ type GetSelectionUseContextCookie struct {
 // GetSelectionUseContext sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetSelectionUseContextCookie.Reply()
 func GetSelectionUseContext(c *xgb.Conn) GetSelectionUseContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'GetSelectionUseContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getSelectionUseContextRequest(c), cookie)
 	return GetSelectionUseContextCookie{cookie}
@@ -1545,6 +1656,9 @@ func GetSelectionUseContext(c *xgb.Conn) GetSelectionUseContextCookie {
 // GetSelectionUseContextUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetSelectionUseContextUnchecked(c *xgb.Conn) GetSelectionUseContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'GetSelectionUseContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getSelectionUseContextRequest(c), cookie)
 	return GetSelectionUseContextCookie{cookie}
@@ -1627,6 +1741,9 @@ type GetSelectionContextCookie struct {
 // GetSelectionContext sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetSelectionContextCookie.Reply()
 func GetSelectionContext(c *xgb.Conn, Selection xproto.Atom) GetSelectionContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'GetSelectionContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getSelectionContextRequest(c, Selection), cookie)
 	return GetSelectionContextCookie{cookie}
@@ -1635,6 +1752,9 @@ func GetSelectionContext(c *xgb.Conn, Selection xproto.Atom) GetSelectionContext
 // GetSelectionContextUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetSelectionContextUnchecked(c *xgb.Conn, Selection xproto.Atom) GetSelectionContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'GetSelectionContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getSelectionContextRequest(c, Selection), cookie)
 	return GetSelectionContextCookie{cookie}
@@ -1720,6 +1840,9 @@ type GetSelectionDataContextCookie struct {
 // GetSelectionDataContext sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetSelectionDataContextCookie.Reply()
 func GetSelectionDataContext(c *xgb.Conn, Selection xproto.Atom) GetSelectionDataContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'GetSelectionDataContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getSelectionDataContextRequest(c, Selection), cookie)
 	return GetSelectionDataContextCookie{cookie}
@@ -1728,6 +1851,9 @@ func GetSelectionDataContext(c *xgb.Conn, Selection xproto.Atom) GetSelectionDat
 // GetSelectionDataContextUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetSelectionDataContextUnchecked(c *xgb.Conn, Selection xproto.Atom) GetSelectionDataContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'GetSelectionDataContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getSelectionDataContextRequest(c, Selection), cookie)
 	return GetSelectionDataContextCookie{cookie}
@@ -1813,6 +1939,9 @@ type ListSelectionsCookie struct {
 // ListSelections sends a checked request.
 // If an error occurs, it will be returned with the reply by calling ListSelectionsCookie.Reply()
 func ListSelections(c *xgb.Conn) ListSelectionsCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'ListSelections' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(listSelectionsRequest(c), cookie)
 	return ListSelectionsCookie{cookie}
@@ -1821,6 +1950,9 @@ func ListSelections(c *xgb.Conn) ListSelectionsCookie {
 // ListSelectionsUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ListSelectionsUnchecked(c *xgb.Conn) ListSelectionsCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'ListSelections' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(listSelectionsRequest(c), cookie)
 	return ListSelectionsCookie{cookie}
@@ -1899,6 +2031,9 @@ type GetClientContextCookie struct {
 // GetClientContext sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetClientContextCookie.Reply()
 func GetClientContext(c *xgb.Conn, Resource uint32) GetClientContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'GetClientContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getClientContextRequest(c, Resource), cookie)
 	return GetClientContextCookie{cookie}
@@ -1907,6 +2042,9 @@ func GetClientContext(c *xgb.Conn, Resource uint32) GetClientContextCookie {
 // GetClientContextUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetClientContextUnchecked(c *xgb.Conn, Resource uint32) GetClientContextCookie {
+	if _, ok := c.Extensions["SELINUX"]; !ok {
+		panic("Cannot issue request 'GetClientContext' using the uninitialized extension 'SELinux'. xselinux.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getClientContextRequest(c, Resource), cookie)
 	return GetClientContextCookie{cookie}
diff --git a/nexgb/xtest/xtest.go b/nexgb/xtest/xtest.go
index 8f964e4..3fab056 100644
--- a/nexgb/xtest/xtest.go
+++ b/nexgb/xtest/xtest.go
@@ -2,7 +2,7 @@
 package xtest
 
 /*
-	This file was generated by xtest.xml on May 11 2012 1:58:37am EDT.
+	This file was generated by xtest.xml on May 11 2012 11:57:20pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -40,10 +40,6 @@ func init() {
 	xgb.NewExtErrorFuncs["XTEST"] = make(map[int]xgb.NewErrorFun)
 }
 
-// Skipping definition for base type 'Card8'
-
-// Skipping definition for base type 'Int16'
-
 // Skipping definition for base type 'Int32'
 
 // Skipping definition for base type 'Void'
@@ -64,6 +60,10 @@ func init() {
 
 // Skipping definition for base type 'Float'
 
+// Skipping definition for base type 'Card8'
+
+// Skipping definition for base type 'Int16'
+
 const (
 	CursorNone    = 0
 	CursorCurrent = 1
@@ -77,6 +77,9 @@ type GetVersionCookie struct {
 // GetVersion sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetVersionCookie.Reply()
 func GetVersion(c *xgb.Conn, MajorVersion byte, MinorVersion uint16) GetVersionCookie {
+	if _, ok := c.Extensions["XTEST"]; !ok {
+		panic("Cannot issue request 'GetVersion' using the uninitialized extension 'XTEST'. xtest.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getVersionRequest(c, MajorVersion, MinorVersion), cookie)
 	return GetVersionCookie{cookie}
@@ -85,6 +88,9 @@ func GetVersion(c *xgb.Conn, MajorVersion byte, MinorVersion uint16) GetVersionC
 // GetVersionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetVersionUnchecked(c *xgb.Conn, MajorVersion byte, MinorVersion uint16) GetVersionCookie {
+	if _, ok := c.Extensions["XTEST"]; !ok {
+		panic("Cannot issue request 'GetVersion' using the uninitialized extension 'XTEST'. xtest.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getVersionRequest(c, MajorVersion, MinorVersion), cookie)
 	return GetVersionCookie{cookie}
@@ -165,6 +171,9 @@ type CompareCursorCookie struct {
 // CompareCursor sends a checked request.
 // If an error occurs, it will be returned with the reply by calling CompareCursorCookie.Reply()
 func CompareCursor(c *xgb.Conn, Window xproto.Window, Cursor xproto.Cursor) CompareCursorCookie {
+	if _, ok := c.Extensions["XTEST"]; !ok {
+		panic("Cannot issue request 'CompareCursor' using the uninitialized extension 'XTEST'. xtest.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(compareCursorRequest(c, Window, Cursor), cookie)
 	return CompareCursorCookie{cookie}
@@ -173,6 +182,9 @@ func CompareCursor(c *xgb.Conn, Window xproto.Window, Cursor xproto.Cursor) Comp
 // CompareCursorUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CompareCursorUnchecked(c *xgb.Conn, Window xproto.Window, Cursor xproto.Cursor) CompareCursorCookie {
+	if _, ok := c.Extensions["XTEST"]; !ok {
+		panic("Cannot issue request 'CompareCursor' using the uninitialized extension 'XTEST'. xtest.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(compareCursorRequest(c, Window, Cursor), cookie)
 	return CompareCursorCookie{cookie}
@@ -251,6 +263,9 @@ type FakeInputCookie struct {
 // FakeInput sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func FakeInput(c *xgb.Conn, Type byte, Detail byte, Time uint32, Root xproto.Window, RootX int16, RootY int16, Deviceid byte) FakeInputCookie {
+	if _, ok := c.Extensions["XTEST"]; !ok {
+		panic("Cannot issue request 'FakeInput' using the uninitialized extension 'XTEST'. xtest.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(fakeInputRequest(c, Type, Detail, Time, Root, RootX, RootY, Deviceid), cookie)
 	return FakeInputCookie{cookie}
@@ -259,6 +274,9 @@ func FakeInput(c *xgb.Conn, Type byte, Detail byte, Time uint32, Root xproto.Win
 // FakeInputChecked sends a checked request.
 // If an error occurs, it can be retrieved using FakeInputCookie.Check()
 func FakeInputChecked(c *xgb.Conn, Type byte, Detail byte, Time uint32, Root xproto.Window, RootX int16, RootY int16, Deviceid byte) FakeInputCookie {
+	if _, ok := c.Extensions["XTEST"]; !ok {
+		panic("Cannot issue request 'FakeInput' using the uninitialized extension 'XTEST'. xtest.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(fakeInputRequest(c, Type, Detail, Time, Root, RootX, RootY, Deviceid), cookie)
 	return FakeInputCookie{cookie}
@@ -324,6 +342,9 @@ type GrabControlCookie struct {
 // GrabControl sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GrabControl(c *xgb.Conn, Impervious bool) GrabControlCookie {
+	if _, ok := c.Extensions["XTEST"]; !ok {
+		panic("Cannot issue request 'GrabControl' using the uninitialized extension 'XTEST'. xtest.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(grabControlRequest(c, Impervious), cookie)
 	return GrabControlCookie{cookie}
@@ -332,6 +353,9 @@ func GrabControl(c *xgb.Conn, Impervious bool) GrabControlCookie {
 // GrabControlChecked sends a checked request.
 // If an error occurs, it can be retrieved using GrabControlCookie.Check()
 func GrabControlChecked(c *xgb.Conn, Impervious bool) GrabControlCookie {
+	if _, ok := c.Extensions["XTEST"]; !ok {
+		panic("Cannot issue request 'GrabControl' using the uninitialized extension 'XTEST'. xtest.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(grabControlRequest(c, Impervious), cookie)
 	return GrabControlCookie{cookie}
diff --git a/nexgb/xv/xv.go b/nexgb/xv/xv.go
index c048e88..c6ba384 100644
--- a/nexgb/xv/xv.go
+++ b/nexgb/xv/xv.go
@@ -2,7 +2,7 @@
 package xv
 
 /*
-	This file was generated by xv.xml on May 11 2012 1:58:37am EDT.
+	This file was generated by xv.xml on May 11 2012 11:57:20pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -41,10 +41,6 @@ func init() {
 	xgb.NewExtErrorFuncs["XVideo"] = make(map[int]xgb.NewErrorFun)
 }
 
-// Skipping definition for base type 'Double'
-
-// Skipping definition for base type 'Bool'
-
 // Skipping definition for base type 'Float'
 
 // Skipping definition for base type 'Card8'
@@ -65,6 +61,10 @@ func init() {
 
 // Skipping definition for base type 'Card32'
 
+// Skipping definition for base type 'Double'
+
+// Skipping definition for base type 'Bool'
+
 const (
 	TypeInputMask  = 1
 	TypeOutputMask = 2
@@ -1205,6 +1205,9 @@ type QueryExtensionCookie struct {
 // QueryExtension sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryExtensionCookie.Reply()
 func QueryExtension(c *xgb.Conn) QueryExtensionCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'QueryExtension' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryExtensionRequest(c), cookie)
 	return QueryExtensionCookie{cookie}
@@ -1213,6 +1216,9 @@ func QueryExtension(c *xgb.Conn) QueryExtensionCookie {
 // QueryExtensionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryExtensionUnchecked(c *xgb.Conn) QueryExtensionCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'QueryExtension' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryExtensionRequest(c), cookie)
 	return QueryExtensionCookie{cookie}
@@ -1288,6 +1294,9 @@ type QueryAdaptorsCookie struct {
 // QueryAdaptors sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryAdaptorsCookie.Reply()
 func QueryAdaptors(c *xgb.Conn, Window xproto.Window) QueryAdaptorsCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'QueryAdaptors' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryAdaptorsRequest(c, Window), cookie)
 	return QueryAdaptorsCookie{cookie}
@@ -1296,6 +1305,9 @@ func QueryAdaptors(c *xgb.Conn, Window xproto.Window) QueryAdaptorsCookie {
 // QueryAdaptorsUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryAdaptorsUnchecked(c *xgb.Conn, Window xproto.Window) QueryAdaptorsCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'QueryAdaptors' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryAdaptorsRequest(c, Window), cookie)
 	return QueryAdaptorsCookie{cookie}
@@ -1377,6 +1389,9 @@ type QueryEncodingsCookie struct {
 // QueryEncodings sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryEncodingsCookie.Reply()
 func QueryEncodings(c *xgb.Conn, Port Port) QueryEncodingsCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'QueryEncodings' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryEncodingsRequest(c, Port), cookie)
 	return QueryEncodingsCookie{cookie}
@@ -1385,6 +1400,9 @@ func QueryEncodings(c *xgb.Conn, Port Port) QueryEncodingsCookie {
 // QueryEncodingsUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryEncodingsUnchecked(c *xgb.Conn, Port Port) QueryEncodingsCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'QueryEncodings' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryEncodingsRequest(c, Port), cookie)
 	return QueryEncodingsCookie{cookie}
@@ -1466,6 +1484,9 @@ type GrabPortCookie struct {
 // GrabPort sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GrabPortCookie.Reply()
 func GrabPort(c *xgb.Conn, Port Port, Time xproto.Timestamp) GrabPortCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'GrabPort' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(grabPortRequest(c, Port, Time), cookie)
 	return GrabPortCookie{cookie}
@@ -1474,6 +1495,9 @@ func GrabPort(c *xgb.Conn, Port Port, Time xproto.Timestamp) GrabPortCookie {
 // GrabPortUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GrabPortUnchecked(c *xgb.Conn, Port Port, Time xproto.Timestamp) GrabPortCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'GrabPort' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(grabPortRequest(c, Port, Time), cookie)
 	return GrabPortCookie{cookie}
@@ -1548,6 +1572,9 @@ type UngrabPortCookie struct {
 // UngrabPort sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func UngrabPort(c *xgb.Conn, Port Port, Time xproto.Timestamp) UngrabPortCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'UngrabPort' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(ungrabPortRequest(c, Port, Time), cookie)
 	return UngrabPortCookie{cookie}
@@ -1556,6 +1583,9 @@ func UngrabPort(c *xgb.Conn, Port Port, Time xproto.Timestamp) UngrabPortCookie
 // UngrabPortChecked sends a checked request.
 // If an error occurs, it can be retrieved using UngrabPortCookie.Check()
 func UngrabPortChecked(c *xgb.Conn, Port Port, Time xproto.Timestamp) UngrabPortCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'UngrabPort' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(ungrabPortRequest(c, Port, Time), cookie)
 	return UngrabPortCookie{cookie}
@@ -1600,6 +1630,9 @@ type PutVideoCookie struct {
 // PutVideo sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PutVideo(c *xgb.Conn, Port Port, Drawable xproto.Drawable, Gc xproto.Gcontext, VidX int16, VidY int16, VidW uint16, VidH uint16, DrwX int16, DrwY int16, DrwW uint16, DrwH uint16) PutVideoCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'PutVideo' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(putVideoRequest(c, Port, Drawable, Gc, VidX, VidY, VidW, VidH, DrwX, DrwY, DrwW, DrwH), cookie)
 	return PutVideoCookie{cookie}
@@ -1608,6 +1641,9 @@ func PutVideo(c *xgb.Conn, Port Port, Drawable xproto.Drawable, Gc xproto.Gconte
 // PutVideoChecked sends a checked request.
 // If an error occurs, it can be retrieved using PutVideoCookie.Check()
 func PutVideoChecked(c *xgb.Conn, Port Port, Drawable xproto.Drawable, Gc xproto.Gcontext, VidX int16, VidY int16, VidW uint16, VidH uint16, DrwX int16, DrwY int16, DrwW uint16, DrwH uint16) PutVideoCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'PutVideo' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(putVideoRequest(c, Port, Drawable, Gc, VidX, VidY, VidW, VidH, DrwX, DrwY, DrwW, DrwH), cookie)
 	return PutVideoCookie{cookie}
@@ -1679,6 +1715,9 @@ type PutStillCookie struct {
 // PutStill sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PutStill(c *xgb.Conn, Port Port, Drawable xproto.Drawable, Gc xproto.Gcontext, VidX int16, VidY int16, VidW uint16, VidH uint16, DrwX int16, DrwY int16, DrwW uint16, DrwH uint16) PutStillCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'PutStill' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(putStillRequest(c, Port, Drawable, Gc, VidX, VidY, VidW, VidH, DrwX, DrwY, DrwW, DrwH), cookie)
 	return PutStillCookie{cookie}
@@ -1687,6 +1726,9 @@ func PutStill(c *xgb.Conn, Port Port, Drawable xproto.Drawable, Gc xproto.Gconte
 // PutStillChecked sends a checked request.
 // If an error occurs, it can be retrieved using PutStillCookie.Check()
 func PutStillChecked(c *xgb.Conn, Port Port, Drawable xproto.Drawable, Gc xproto.Gcontext, VidX int16, VidY int16, VidW uint16, VidH uint16, DrwX int16, DrwY int16, DrwW uint16, DrwH uint16) PutStillCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'PutStill' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(putStillRequest(c, Port, Drawable, Gc, VidX, VidY, VidW, VidH, DrwX, DrwY, DrwW, DrwH), cookie)
 	return PutStillCookie{cookie}
@@ -1758,6 +1800,9 @@ type GetVideoCookie struct {
 // GetVideo sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetVideo(c *xgb.Conn, Port Port, Drawable xproto.Drawable, Gc xproto.Gcontext, VidX int16, VidY int16, VidW uint16, VidH uint16, DrwX int16, DrwY int16, DrwW uint16, DrwH uint16) GetVideoCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'GetVideo' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(getVideoRequest(c, Port, Drawable, Gc, VidX, VidY, VidW, VidH, DrwX, DrwY, DrwW, DrwH), cookie)
 	return GetVideoCookie{cookie}
@@ -1766,6 +1811,9 @@ func GetVideo(c *xgb.Conn, Port Port, Drawable xproto.Drawable, Gc xproto.Gconte
 // GetVideoChecked sends a checked request.
 // If an error occurs, it can be retrieved using GetVideoCookie.Check()
 func GetVideoChecked(c *xgb.Conn, Port Port, Drawable xproto.Drawable, Gc xproto.Gcontext, VidX int16, VidY int16, VidW uint16, VidH uint16, DrwX int16, DrwY int16, DrwW uint16, DrwH uint16) GetVideoCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'GetVideo' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(getVideoRequest(c, Port, Drawable, Gc, VidX, VidY, VidW, VidH, DrwX, DrwY, DrwW, DrwH), cookie)
 	return GetVideoCookie{cookie}
@@ -1837,6 +1885,9 @@ type GetStillCookie struct {
 // GetStill sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetStill(c *xgb.Conn, Port Port, Drawable xproto.Drawable, Gc xproto.Gcontext, VidX int16, VidY int16, VidW uint16, VidH uint16, DrwX int16, DrwY int16, DrwW uint16, DrwH uint16) GetStillCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'GetStill' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(getStillRequest(c, Port, Drawable, Gc, VidX, VidY, VidW, VidH, DrwX, DrwY, DrwW, DrwH), cookie)
 	return GetStillCookie{cookie}
@@ -1845,6 +1896,9 @@ func GetStill(c *xgb.Conn, Port Port, Drawable xproto.Drawable, Gc xproto.Gconte
 // GetStillChecked sends a checked request.
 // If an error occurs, it can be retrieved using GetStillCookie.Check()
 func GetStillChecked(c *xgb.Conn, Port Port, Drawable xproto.Drawable, Gc xproto.Gcontext, VidX int16, VidY int16, VidW uint16, VidH uint16, DrwX int16, DrwY int16, DrwW uint16, DrwH uint16) GetStillCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'GetStill' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(getStillRequest(c, Port, Drawable, Gc, VidX, VidY, VidW, VidH, DrwX, DrwY, DrwW, DrwH), cookie)
 	return GetStillCookie{cookie}
@@ -1916,6 +1970,9 @@ type StopVideoCookie struct {
 // StopVideo sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func StopVideo(c *xgb.Conn, Port Port, Drawable xproto.Drawable) StopVideoCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'StopVideo' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(stopVideoRequest(c, Port, Drawable), cookie)
 	return StopVideoCookie{cookie}
@@ -1924,6 +1981,9 @@ func StopVideo(c *xgb.Conn, Port Port, Drawable xproto.Drawable) StopVideoCookie
 // StopVideoChecked sends a checked request.
 // If an error occurs, it can be retrieved using StopVideoCookie.Check()
 func StopVideoChecked(c *xgb.Conn, Port Port, Drawable xproto.Drawable) StopVideoCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'StopVideo' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(stopVideoRequest(c, Port, Drawable), cookie)
 	return StopVideoCookie{cookie}
@@ -1968,6 +2028,9 @@ type SelectVideoNotifyCookie struct {
 // SelectVideoNotify sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SelectVideoNotify(c *xgb.Conn, Drawable xproto.Drawable, Onoff bool) SelectVideoNotifyCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'SelectVideoNotify' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(selectVideoNotifyRequest(c, Drawable, Onoff), cookie)
 	return SelectVideoNotifyCookie{cookie}
@@ -1976,6 +2039,9 @@ func SelectVideoNotify(c *xgb.Conn, Drawable xproto.Drawable, Onoff bool) Select
 // SelectVideoNotifyChecked sends a checked request.
 // If an error occurs, it can be retrieved using SelectVideoNotifyCookie.Check()
 func SelectVideoNotifyChecked(c *xgb.Conn, Drawable xproto.Drawable, Onoff bool) SelectVideoNotifyCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'SelectVideoNotify' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(selectVideoNotifyRequest(c, Drawable, Onoff), cookie)
 	return SelectVideoNotifyCookie{cookie}
@@ -2026,6 +2092,9 @@ type SelectPortNotifyCookie struct {
 // SelectPortNotify sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SelectPortNotify(c *xgb.Conn, Port Port, Onoff bool) SelectPortNotifyCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'SelectPortNotify' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(selectPortNotifyRequest(c, Port, Onoff), cookie)
 	return SelectPortNotifyCookie{cookie}
@@ -2034,6 +2103,9 @@ func SelectPortNotify(c *xgb.Conn, Port Port, Onoff bool) SelectPortNotifyCookie
 // SelectPortNotifyChecked sends a checked request.
 // If an error occurs, it can be retrieved using SelectPortNotifyCookie.Check()
 func SelectPortNotifyChecked(c *xgb.Conn, Port Port, Onoff bool) SelectPortNotifyCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'SelectPortNotify' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(selectPortNotifyRequest(c, Port, Onoff), cookie)
 	return SelectPortNotifyCookie{cookie}
@@ -2084,6 +2156,9 @@ type QueryBestSizeCookie struct {
 // QueryBestSize sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryBestSizeCookie.Reply()
 func QueryBestSize(c *xgb.Conn, Port Port, VidW uint16, VidH uint16, DrwW uint16, DrwH uint16, Motion bool) QueryBestSizeCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'QueryBestSize' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryBestSizeRequest(c, Port, VidW, VidH, DrwW, DrwH, Motion), cookie)
 	return QueryBestSizeCookie{cookie}
@@ -2092,6 +2167,9 @@ func QueryBestSize(c *xgb.Conn, Port Port, VidW uint16, VidH uint16, DrwW uint16
 // QueryBestSizeUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryBestSizeUnchecked(c *xgb.Conn, Port Port, VidW uint16, VidH uint16, DrwW uint16, DrwH uint16, Motion bool) QueryBestSizeCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'QueryBestSize' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryBestSizeRequest(c, Port, VidW, VidH, DrwW, DrwH, Motion), cookie)
 	return QueryBestSizeCookie{cookie}
@@ -2191,6 +2269,9 @@ type SetPortAttributeCookie struct {
 // SetPortAttribute sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func SetPortAttribute(c *xgb.Conn, Port Port, Attribute xproto.Atom, Value int32) SetPortAttributeCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'SetPortAttribute' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(setPortAttributeRequest(c, Port, Attribute, Value), cookie)
 	return SetPortAttributeCookie{cookie}
@@ -2199,6 +2280,9 @@ func SetPortAttribute(c *xgb.Conn, Port Port, Attribute xproto.Atom, Value int32
 // SetPortAttributeChecked sends a checked request.
 // If an error occurs, it can be retrieved using SetPortAttributeCookie.Check()
 func SetPortAttributeChecked(c *xgb.Conn, Port Port, Attribute xproto.Atom, Value int32) SetPortAttributeCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'SetPortAttribute' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(setPortAttributeRequest(c, Port, Attribute, Value), cookie)
 	return SetPortAttributeCookie{cookie}
@@ -2246,6 +2330,9 @@ type GetPortAttributeCookie struct {
 // GetPortAttribute sends a checked request.
 // If an error occurs, it will be returned with the reply by calling GetPortAttributeCookie.Reply()
 func GetPortAttribute(c *xgb.Conn, Port Port, Attribute xproto.Atom) GetPortAttributeCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'GetPortAttribute' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(getPortAttributeRequest(c, Port, Attribute), cookie)
 	return GetPortAttributeCookie{cookie}
@@ -2254,6 +2341,9 @@ func GetPortAttribute(c *xgb.Conn, Port Port, Attribute xproto.Atom) GetPortAttr
 // GetPortAttributeUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func GetPortAttributeUnchecked(c *xgb.Conn, Port Port, Attribute xproto.Atom) GetPortAttributeCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'GetPortAttribute' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(getPortAttributeRequest(c, Port, Attribute), cookie)
 	return GetPortAttributeCookie{cookie}
@@ -2331,6 +2421,9 @@ type QueryPortAttributesCookie struct {
 // QueryPortAttributes sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryPortAttributesCookie.Reply()
 func QueryPortAttributes(c *xgb.Conn, Port Port) QueryPortAttributesCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'QueryPortAttributes' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryPortAttributesRequest(c, Port), cookie)
 	return QueryPortAttributesCookie{cookie}
@@ -2339,6 +2432,9 @@ func QueryPortAttributes(c *xgb.Conn, Port Port) QueryPortAttributesCookie {
 // QueryPortAttributesUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryPortAttributesUnchecked(c *xgb.Conn, Port Port) QueryPortAttributesCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'QueryPortAttributes' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryPortAttributesRequest(c, Port), cookie)
 	return QueryPortAttributesCookie{cookie}
@@ -2424,6 +2520,9 @@ type ListImageFormatsCookie struct {
 // ListImageFormats sends a checked request.
 // If an error occurs, it will be returned with the reply by calling ListImageFormatsCookie.Reply()
 func ListImageFormats(c *xgb.Conn, Port Port) ListImageFormatsCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'ListImageFormats' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(listImageFormatsRequest(c, Port), cookie)
 	return ListImageFormatsCookie{cookie}
@@ -2432,6 +2531,9 @@ func ListImageFormats(c *xgb.Conn, Port Port) ListImageFormatsCookie {
 // ListImageFormatsUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ListImageFormatsUnchecked(c *xgb.Conn, Port Port) ListImageFormatsCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'ListImageFormats' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(listImageFormatsRequest(c, Port), cookie)
 	return ListImageFormatsCookie{cookie}
@@ -2513,6 +2615,9 @@ type QueryImageAttributesCookie struct {
 // QueryImageAttributes sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryImageAttributesCookie.Reply()
 func QueryImageAttributes(c *xgb.Conn, Port Port, Id uint32, Width uint16, Height uint16) QueryImageAttributesCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'QueryImageAttributes' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryImageAttributesRequest(c, Port, Id, Width, Height), cookie)
 	return QueryImageAttributesCookie{cookie}
@@ -2521,6 +2626,9 @@ func QueryImageAttributes(c *xgb.Conn, Port Port, Id uint32, Width uint16, Heigh
 // QueryImageAttributesUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryImageAttributesUnchecked(c *xgb.Conn, Port Port, Id uint32, Width uint16, Height uint16) QueryImageAttributesCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'QueryImageAttributes' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryImageAttributesRequest(c, Port, Id, Width, Height), cookie)
 	return QueryImageAttributesCookie{cookie}
@@ -2635,6 +2743,9 @@ type PutImageCookie struct {
 // PutImage sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func PutImage(c *xgb.Conn, Port Port, Drawable xproto.Drawable, Gc xproto.Gcontext, Id uint32, SrcX int16, SrcY int16, SrcW uint16, SrcH uint16, DrwX int16, DrwY int16, DrwW uint16, DrwH uint16, Width uint16, Height uint16, Data []byte) PutImageCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'PutImage' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(putImageRequest(c, Port, Drawable, Gc, Id, SrcX, SrcY, SrcW, SrcH, DrwX, DrwY, DrwW, DrwH, Width, Height, Data), cookie)
 	return PutImageCookie{cookie}
@@ -2643,6 +2754,9 @@ func PutImage(c *xgb.Conn, Port Port, Drawable xproto.Drawable, Gc xproto.Gconte
 // PutImageChecked sends a checked request.
 // If an error occurs, it can be retrieved using PutImageCookie.Check()
 func PutImageChecked(c *xgb.Conn, Port Port, Drawable xproto.Drawable, Gc xproto.Gcontext, Id uint32, SrcX int16, SrcY int16, SrcW uint16, SrcH uint16, DrwX int16, DrwY int16, DrwW uint16, DrwH uint16, Width uint16, Height uint16, Data []byte) PutImageCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'PutImage' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(putImageRequest(c, Port, Drawable, Gc, Id, SrcX, SrcY, SrcW, SrcH, DrwX, DrwY, DrwW, DrwH, Width, Height, Data), cookie)
 	return PutImageCookie{cookie}
@@ -2726,6 +2840,9 @@ type ShmPutImageCookie struct {
 // ShmPutImage sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ShmPutImage(c *xgb.Conn, Port Port, Drawable xproto.Drawable, Gc xproto.Gcontext, Shmseg shm.Seg, Id uint32, Offset uint32, SrcX int16, SrcY int16, SrcW uint16, SrcH uint16, DrwX int16, DrwY int16, DrwW uint16, DrwH uint16, Width uint16, Height uint16, SendEvent byte) ShmPutImageCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'ShmPutImage' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(shmPutImageRequest(c, Port, Drawable, Gc, Shmseg, Id, Offset, SrcX, SrcY, SrcW, SrcH, DrwX, DrwY, DrwW, DrwH, Width, Height, SendEvent), cookie)
 	return ShmPutImageCookie{cookie}
@@ -2734,6 +2851,9 @@ func ShmPutImage(c *xgb.Conn, Port Port, Drawable xproto.Drawable, Gc xproto.Gco
 // ShmPutImageChecked sends a checked request.
 // If an error occurs, it can be retrieved using ShmPutImageCookie.Check()
 func ShmPutImageChecked(c *xgb.Conn, Port Port, Drawable xproto.Drawable, Gc xproto.Gcontext, Shmseg shm.Seg, Id uint32, Offset uint32, SrcX int16, SrcY int16, SrcW uint16, SrcH uint16, DrwX int16, DrwY int16, DrwW uint16, DrwH uint16, Width uint16, Height uint16, SendEvent byte) ShmPutImageCookie {
+	if _, ok := c.Extensions["XVIDEO"]; !ok {
+		panic("Cannot issue request 'ShmPutImage' using the uninitialized extension 'XVideo'. xv.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(shmPutImageRequest(c, Port, Drawable, Gc, Shmseg, Id, Offset, SrcX, SrcY, SrcW, SrcH, DrwX, DrwY, DrwW, DrwH, Width, Height, SendEvent), cookie)
 	return ShmPutImageCookie{cookie}
diff --git a/nexgb/xvmc/xvmc.go b/nexgb/xvmc/xvmc.go
index cf794cc..19b1c83 100644
--- a/nexgb/xvmc/xvmc.go
+++ b/nexgb/xvmc/xvmc.go
@@ -2,7 +2,7 @@
 package xvmc
 
 /*
-	This file was generated by xvmc.xml on May 11 2012 1:58:37am EDT.
+	This file was generated by xvmc.xml on May 11 2012 11:57:20pm EDT.
 	This file is automatically generated. Edit at your peril!
 */
 
@@ -41,6 +41,16 @@ func init() {
 	xgb.NewExtErrorFuncs["XVideo-MotionCompensation"] = make(map[int]xgb.NewErrorFun)
 }
 
+// Skipping definition for base type 'Card8'
+
+// Skipping definition for base type 'Int16'
+
+// Skipping definition for base type 'Int32'
+
+// Skipping definition for base type 'Void'
+
+// Skipping definition for base type 'Byte'
+
 // Skipping definition for base type 'Int8'
 
 // Skipping definition for base type 'Card16'
@@ -55,16 +65,6 @@ func init() {
 
 // Skipping definition for base type 'Float'
 
-// Skipping definition for base type 'Card8'
-
-// Skipping definition for base type 'Int16'
-
-// Skipping definition for base type 'Int32'
-
-// Skipping definition for base type 'Void'
-
-// Skipping definition for base type 'Byte'
-
 type Context uint32
 
 func NewContextId(c *xgb.Conn) (Context, error) {
@@ -206,6 +206,9 @@ type QueryVersionCookie struct {
 // QueryVersion sends a checked request.
 // If an error occurs, it will be returned with the reply by calling QueryVersionCookie.Reply()
 func QueryVersion(c *xgb.Conn) QueryVersionCookie {
+	if _, ok := c.Extensions["XVIDEO-MOTIONCOMPENSATION"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'XVideo-MotionCompensation'. xvmc.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(queryVersionRequest(c), cookie)
 	return QueryVersionCookie{cookie}
@@ -214,6 +217,9 @@ func QueryVersion(c *xgb.Conn) QueryVersionCookie {
 // QueryVersionUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func QueryVersionUnchecked(c *xgb.Conn) QueryVersionCookie {
+	if _, ok := c.Extensions["XVIDEO-MOTIONCOMPENSATION"]; !ok {
+		panic("Cannot issue request 'QueryVersion' using the uninitialized extension 'XVideo-MotionCompensation'. xvmc.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(queryVersionRequest(c), cookie)
 	return QueryVersionCookie{cookie}
@@ -289,6 +295,9 @@ type ListSurfaceTypesCookie struct {
 // ListSurfaceTypes sends a checked request.
 // If an error occurs, it will be returned with the reply by calling ListSurfaceTypesCookie.Reply()
 func ListSurfaceTypes(c *xgb.Conn, PortId xv.Port) ListSurfaceTypesCookie {
+	if _, ok := c.Extensions["XVIDEO-MOTIONCOMPENSATION"]; !ok {
+		panic("Cannot issue request 'ListSurfaceTypes' using the uninitialized extension 'XVideo-MotionCompensation'. xvmc.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(listSurfaceTypesRequest(c, PortId), cookie)
 	return ListSurfaceTypesCookie{cookie}
@@ -297,6 +306,9 @@ func ListSurfaceTypes(c *xgb.Conn, PortId xv.Port) ListSurfaceTypesCookie {
 // ListSurfaceTypesUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ListSurfaceTypesUnchecked(c *xgb.Conn, PortId xv.Port) ListSurfaceTypesCookie {
+	if _, ok := c.Extensions["XVIDEO-MOTIONCOMPENSATION"]; !ok {
+		panic("Cannot issue request 'ListSurfaceTypes' using the uninitialized extension 'XVideo-MotionCompensation'. xvmc.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(listSurfaceTypesRequest(c, PortId), cookie)
 	return ListSurfaceTypesCookie{cookie}
@@ -378,6 +390,9 @@ type CreateContextCookie struct {
 // CreateContext sends a checked request.
 // If an error occurs, it will be returned with the reply by calling CreateContextCookie.Reply()
 func CreateContext(c *xgb.Conn, ContextId Context, PortId xv.Port, SurfaceId Surface, Width uint16, Height uint16, Flags uint32) CreateContextCookie {
+	if _, ok := c.Extensions["XVIDEO-MOTIONCOMPENSATION"]; !ok {
+		panic("Cannot issue request 'CreateContext' using the uninitialized extension 'XVideo-MotionCompensation'. xvmc.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(createContextRequest(c, ContextId, PortId, SurfaceId, Width, Height, Flags), cookie)
 	return CreateContextCookie{cookie}
@@ -386,6 +401,9 @@ func CreateContext(c *xgb.Conn, ContextId Context, PortId xv.Port, SurfaceId Sur
 // CreateContextUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateContextUnchecked(c *xgb.Conn, ContextId Context, PortId xv.Port, SurfaceId Surface, Width uint16, Height uint16, Flags uint32) CreateContextCookie {
+	if _, ok := c.Extensions["XVIDEO-MOTIONCOMPENSATION"]; !ok {
+		panic("Cannot issue request 'CreateContext' using the uninitialized extension 'XVideo-MotionCompensation'. xvmc.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(createContextRequest(c, ContextId, PortId, SurfaceId, Width, Height, Flags), cookie)
 	return CreateContextCookie{cookie}
@@ -494,6 +512,9 @@ type DestroyContextCookie struct {
 // DestroyContext sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func DestroyContext(c *xgb.Conn, ContextId Context) DestroyContextCookie {
+	if _, ok := c.Extensions["XVIDEO-MOTIONCOMPENSATION"]; !ok {
+		panic("Cannot issue request 'DestroyContext' using the uninitialized extension 'XVideo-MotionCompensation'. xvmc.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(destroyContextRequest(c, ContextId), cookie)
 	return DestroyContextCookie{cookie}
@@ -502,6 +523,9 @@ func DestroyContext(c *xgb.Conn, ContextId Context) DestroyContextCookie {
 // DestroyContextChecked sends a checked request.
 // If an error occurs, it can be retrieved using DestroyContextCookie.Check()
 func DestroyContextChecked(c *xgb.Conn, ContextId Context) DestroyContextCookie {
+	if _, ok := c.Extensions["XVIDEO-MOTIONCOMPENSATION"]; !ok {
+		panic("Cannot issue request 'DestroyContext' using the uninitialized extension 'XVideo-MotionCompensation'. xvmc.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(destroyContextRequest(c, ContextId), cookie)
 	return DestroyContextCookie{cookie}
@@ -543,6 +567,9 @@ type CreateSurfaceCookie struct {
 // CreateSurface sends a checked request.
 // If an error occurs, it will be returned with the reply by calling CreateSurfaceCookie.Reply()
 func CreateSurface(c *xgb.Conn, SurfaceId Surface, ContextId Context) CreateSurfaceCookie {
+	if _, ok := c.Extensions["XVIDEO-MOTIONCOMPENSATION"]; !ok {
+		panic("Cannot issue request 'CreateSurface' using the uninitialized extension 'XVideo-MotionCompensation'. xvmc.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(createSurfaceRequest(c, SurfaceId, ContextId), cookie)
 	return CreateSurfaceCookie{cookie}
@@ -551,6 +578,9 @@ func CreateSurface(c *xgb.Conn, SurfaceId Surface, ContextId Context) CreateSurf
 // CreateSurfaceUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateSurfaceUnchecked(c *xgb.Conn, SurfaceId Surface, ContextId Context) CreateSurfaceCookie {
+	if _, ok := c.Extensions["XVIDEO-MOTIONCOMPENSATION"]; !ok {
+		panic("Cannot issue request 'CreateSurface' using the uninitialized extension 'XVideo-MotionCompensation'. xvmc.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(createSurfaceRequest(c, SurfaceId, ContextId), cookie)
 	return CreateSurfaceCookie{cookie}
@@ -635,6 +665,9 @@ type DestroySurfaceCookie struct {
 // DestroySurface sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func DestroySurface(c *xgb.Conn, SurfaceId Surface) DestroySurfaceCookie {
+	if _, ok := c.Extensions["XVIDEO-MOTIONCOMPENSATION"]; !ok {
+		panic("Cannot issue request 'DestroySurface' using the uninitialized extension 'XVideo-MotionCompensation'. xvmc.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(destroySurfaceRequest(c, SurfaceId), cookie)
 	return DestroySurfaceCookie{cookie}
@@ -643,6 +676,9 @@ func DestroySurface(c *xgb.Conn, SurfaceId Surface) DestroySurfaceCookie {
 // DestroySurfaceChecked sends a checked request.
 // If an error occurs, it can be retrieved using DestroySurfaceCookie.Check()
 func DestroySurfaceChecked(c *xgb.Conn, SurfaceId Surface) DestroySurfaceCookie {
+	if _, ok := c.Extensions["XVIDEO-MOTIONCOMPENSATION"]; !ok {
+		panic("Cannot issue request 'DestroySurface' using the uninitialized extension 'XVideo-MotionCompensation'. xvmc.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(destroySurfaceRequest(c, SurfaceId), cookie)
 	return DestroySurfaceCookie{cookie}
@@ -684,6 +720,9 @@ type CreateSubpictureCookie struct {
 // CreateSubpicture sends a checked request.
 // If an error occurs, it will be returned with the reply by calling CreateSubpictureCookie.Reply()
 func CreateSubpicture(c *xgb.Conn, SubpictureId Subpicture, Context Context, XvimageId uint32, Width uint16, Height uint16) CreateSubpictureCookie {
+	if _, ok := c.Extensions["XVIDEO-MOTIONCOMPENSATION"]; !ok {
+		panic("Cannot issue request 'CreateSubpicture' using the uninitialized extension 'XVideo-MotionCompensation'. xvmc.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(createSubpictureRequest(c, SubpictureId, Context, XvimageId, Width, Height), cookie)
 	return CreateSubpictureCookie{cookie}
@@ -692,6 +731,9 @@ func CreateSubpicture(c *xgb.Conn, SubpictureId Subpicture, Context Context, Xvi
 // CreateSubpictureUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func CreateSubpictureUnchecked(c *xgb.Conn, SubpictureId Subpicture, Context Context, XvimageId uint32, Width uint16, Height uint16) CreateSubpictureCookie {
+	if _, ok := c.Extensions["XVIDEO-MOTIONCOMPENSATION"]; !ok {
+		panic("Cannot issue request 'CreateSubpicture' using the uninitialized extension 'XVideo-MotionCompensation'. xvmc.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(createSubpictureRequest(c, SubpictureId, Context, XvimageId, Width, Height), cookie)
 	return CreateSubpictureCookie{cookie}
@@ -806,6 +848,9 @@ type DestroySubpictureCookie struct {
 // DestroySubpicture sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func DestroySubpicture(c *xgb.Conn, SubpictureId Subpicture) DestroySubpictureCookie {
+	if _, ok := c.Extensions["XVIDEO-MOTIONCOMPENSATION"]; !ok {
+		panic("Cannot issue request 'DestroySubpicture' using the uninitialized extension 'XVideo-MotionCompensation'. xvmc.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, false)
 	c.NewRequest(destroySubpictureRequest(c, SubpictureId), cookie)
 	return DestroySubpictureCookie{cookie}
@@ -814,6 +859,9 @@ func DestroySubpicture(c *xgb.Conn, SubpictureId Subpicture) DestroySubpictureCo
 // DestroySubpictureChecked sends a checked request.
 // If an error occurs, it can be retrieved using DestroySubpictureCookie.Check()
 func DestroySubpictureChecked(c *xgb.Conn, SubpictureId Subpicture) DestroySubpictureCookie {
+	if _, ok := c.Extensions["XVIDEO-MOTIONCOMPENSATION"]; !ok {
+		panic("Cannot issue request 'DestroySubpicture' using the uninitialized extension 'XVideo-MotionCompensation'. xvmc.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, false)
 	c.NewRequest(destroySubpictureRequest(c, SubpictureId), cookie)
 	return DestroySubpictureCookie{cookie}
@@ -855,6 +903,9 @@ type ListSubpictureTypesCookie struct {
 // ListSubpictureTypes sends a checked request.
 // If an error occurs, it will be returned with the reply by calling ListSubpictureTypesCookie.Reply()
 func ListSubpictureTypes(c *xgb.Conn, PortId xv.Port, SurfaceId Surface) ListSubpictureTypesCookie {
+	if _, ok := c.Extensions["XVIDEO-MOTIONCOMPENSATION"]; !ok {
+		panic("Cannot issue request 'ListSubpictureTypes' using the uninitialized extension 'XVideo-MotionCompensation'. xvmc.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(true, true)
 	c.NewRequest(listSubpictureTypesRequest(c, PortId, SurfaceId), cookie)
 	return ListSubpictureTypesCookie{cookie}
@@ -863,6 +914,9 @@ func ListSubpictureTypes(c *xgb.Conn, PortId xv.Port, SurfaceId Surface) ListSub
 // ListSubpictureTypesUnchecked sends an unchecked request.
 // If an error occurs, it can only be retrieved using xgb.WaitForEvent or xgb.PollForEvent.
 func ListSubpictureTypesUnchecked(c *xgb.Conn, PortId xv.Port, SurfaceId Surface) ListSubpictureTypesCookie {
+	if _, ok := c.Extensions["XVIDEO-MOTIONCOMPENSATION"]; !ok {
+		panic("Cannot issue request 'ListSubpictureTypes' using the uninitialized extension 'XVideo-MotionCompensation'. xvmc.Init(connObj) must be called first.")
+	}
 	cookie := c.NewCookie(false, true)
 	c.NewRequest(listSubpictureTypesRequest(c, PortId, SurfaceId), cookie)
 	return ListSubpictureTypesCookie{cookie}