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

1 files changed, 181 insertions, 1 deletions

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}