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-rw-r--r--nncmpp.c45
1 files changed, 33 insertions, 12 deletions
diff --git a/nncmpp.c b/nncmpp.c
index c9f3acb..3a7227e 100644
--- a/nncmpp.c
+++ b/nncmpp.c
@@ -1357,6 +1357,7 @@ static struct app_context
int xkb_base_event_code; ///< Xkb base event code
Window x11_window; ///< Application window
Pixmap x11_pixmap; ///< Off-screen bitmap
+ Region x11_clip; ///< Invalidated region
Picture x11_pixmap_picture; ///< XRender wrap for x11_pixmap
XftDraw *xft_draw; ///< Xft rendering context
XftFont *xft_regular; ///< Regular font
@@ -5673,19 +5674,27 @@ x11_render_spectrum (struct widget *self)
x11_render_padding (self);
#ifdef WITH_FFTW
- int step = self->width / g.spectrum.bars;
+ XRectangle rectangles[g.spectrum.bars];
+ int step = self->width / N_ELEMENTS (rectangles);
for (int i = 0; i < g.spectrum.bars; i++)
{
- float value = g.spectrum.spectrum[i];
- int height = round ((self->height - 2) * value);
- XRenderFillRectangle (g.dpy, PictOpSrc,
- g.x11_pixmap_picture, x11_fg (self),
+ int height = round ((self->height - 2) * g.spectrum.spectrum[i]);
+ rectangles[i] = (XRectangle)
+ {
self->x + i * step,
self->y + self->height - 1 - height,
step,
- height);
+ height,
+ };
}
-#endif // WITH_FFTW
+
+ XRenderFillRectangles (g.dpy, PictOpSrc, g.x11_pixmap_picture,
+ x11_fg (self), rectangles, N_ELEMENTS (rectangles));
+#endif // WITH_FFTW
+
+ // Enable the spectrum_redraw() hack.
+ XRectangle r = { self->x, self->y, self->width, self->height };
+ XUnionRectWithRegion (&r, g.x11_clip, g.x11_clip);
}
static struct widget *
@@ -5812,20 +5821,26 @@ x11_render (void)
{
XRenderFillRectangle (g.dpy, PictOpSrc, g.x11_pixmap_picture,
&x11_default_bg, 0, 0, g.ui_width, g.ui_height);
-
- // TODO: Consider setting clip rectangles (not particularly needed).
LIST_FOR_EACH (struct widget, w, g.widgets.head)
if (w->width && w->height)
w->on_render (w);
+
+ XRectangle r = { 0, 0, g.ui_width, g.ui_height };
+ XUnionRectWithRegion (&r, g.x11_clip, g.x11_clip);
poller_idle_set (&g.xpending_event);
}
static void
x11_flip (void)
{
+ // This exercise in futility doesn't seem to affect CPU usage much.
+ XRectangle r = {};
+ XClipBox (g.x11_clip, &r);
XCopyArea (g.dpy, g.x11_pixmap, g.x11_window,
DefaultGC (g.dpy, DefaultScreen (g.dpy)),
- 0, 0, g.ui_width, g.ui_height, 0, 0);
+ r.x, r.y, r.width, r.height, r.x, r.y);
+
+ XSubtractRegion (g.x11_clip, g.x11_clip, g.x11_clip);
poller_idle_set (&g.xpending_event);
}
@@ -5834,6 +5849,7 @@ x11_destroy (void)
{
XDestroyIC (g.x11_ic);
XCloseIM (g.x11_im);
+ XDestroyRegion (g.x11_clip);
XDestroyWindow (g.dpy, g.x11_window);
XRenderFreePicture (g.dpy, g.x11_pixmap_picture);
XFreePixmap (g.dpy, g.x11_pixmap);
@@ -6072,9 +6088,13 @@ on_x11_event (XEvent *ev)
switch (ev->type)
{
case Expose:
- if (!ev->xexpose.count)
- poller_idle_set (&g.flip_event);
+ {
+ XRectangle r = { ev->xexpose.x, ev->xexpose.y,
+ ev->xexpose.width, ev->xexpose.height };
+ XUnionRectWithRegion (&r, g.x11_clip, g.x11_clip);
+ poller_idle_set (&g.flip_event);
break;
+ }
case ConfigureNotify:
if (g.ui_width == ev->xconfigure.width
&& g.ui_height == ev->xconfigure.height)
@@ -6308,6 +6328,7 @@ x11_init (void)
g.x11_window = XCreateWindow (g.dpy, RootWindow (g.dpy, screen), 100, 100,
g.ui_width, g.ui_height, 0, CopyFromParent, InputOutput, visual,
CWEventMask | CWBackPixel | CWBitGravity, &attrs);
+ g.x11_clip = XCreateRegion ();
XTextProperty prop = {};
char *name = PROGRAM_NAME;