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Feature #69: GLX: Blur background

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- GLX backend: Add blur background support using a GLSL shader. Only
  tested with nvidia-drivers-313.26. Known to cause quite some decrease
  in performance (~10%?).

- Detach shaders in glx_create_program(). Misc changes.
This commit is contained in:
Richard Grenville
2013-03-20 17:29:45 +08:00
parent 725bc40a65
commit 8208ec6dc8
4 changed files with 174 additions and 69 deletions
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100
src/compton.c
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@@ -1329,60 +1329,76 @@ win_build_picture(session_t *ps, win *w, XRenderPictFormat *pictfmt) {
static inline void
win_blur_background(session_t *ps, win *w, Picture tgt_buffer,
XserverRegion reg_paint) {
const static int convolution_blur_size = 3;
// Convolution filter parameter (box blur)
// gaussian or binomial filters are definitely superior, yet looks
// like they aren't supported as of xorg-server-1.13.0
XFixed convolution_blur[] = {
// Must convert to XFixed with XDoubleToFixed()
// Matrix size
XDoubleToFixed(convolution_blur_size),
XDoubleToFixed(convolution_blur_size),
// Matrix
XDoubleToFixed(1), XDoubleToFixed(1), XDoubleToFixed(1),
XDoubleToFixed(1), XDoubleToFixed(1), XDoubleToFixed(1),
XDoubleToFixed(1), XDoubleToFixed(1), XDoubleToFixed(1),
};
const int x = w->a.x;
const int y = w->a.y;
const int wid = w->widthb;
const int hei = w->heightb;
// Directly copying from tgt_buffer does not work, so we create a
// Picture in the middle.
Picture tmp_picture = win_build_picture(ps, w, NULL);
if (!tmp_picture)
return;
double factor_center = 1.0;
// Adjust blur strength according to window opacity, to make it appear
// better during fading
if (!ps->o.blur_background_fixed) {
double pct = 1.0 - get_opacity_percent(w) * (1.0 - 1.0 / 9.0);
convolution_blur[2 + convolution_blur_size + ((convolution_blur_size - 1) / 2)] = XDoubleToFixed(pct * 8.0 / (1.1 - pct));
factor_center = pct * 8.0 / (1.1 - pct);
}
// Minimize the region we try to blur, if the window itself is not
// opaque, only the frame is.
if (WMODE_SOLID == w->mode && w->frame_opacity) {
XserverRegion reg_all = border_size(ps, w, false);
XserverRegion reg_noframe = win_get_region_noframe(ps, w, false);
XFixesSubtractRegion(ps->dpy, reg_noframe, reg_all, reg_noframe);
XFixesSetPictureClipRegion(ps->dpy, tmp_picture, reg_noframe, 0, 0);
free_region(ps, &reg_all);
free_region(ps, &reg_noframe);
switch (ps->o.backend) {
case BKEND_XRENDER:
{
const static int convolution_blur_size = 3;
// Convolution filter parameter (box blur)
// gaussian or binomial filters are definitely superior, yet looks
// like they aren't supported as of xorg-server-1.13.0
XFixed convolution_blur[] = {
// Must convert to XFixed with XDoubleToFixed()
// Matrix size
XDoubleToFixed(convolution_blur_size),
XDoubleToFixed(convolution_blur_size),
// Matrix
XDoubleToFixed(1), XDoubleToFixed(1), XDoubleToFixed(1),
XDoubleToFixed(1), XDoubleToFixed(1), XDoubleToFixed(1),
XDoubleToFixed(1), XDoubleToFixed(1), XDoubleToFixed(1),
};
// Directly copying from tgt_buffer does not work, so we create a
// Picture in the middle.
Picture tmp_picture = win_build_picture(ps, w, NULL);
if (!tmp_picture)
return;
convolution_blur[2 + convolution_blur_size + ((convolution_blur_size - 1) / 2)] = XDoubleToFixed(factor_center);
// Minimize the region we try to blur, if the window itself is not
// opaque, only the frame is.
if (WMODE_SOLID == w->mode && w->frame_opacity) {
XserverRegion reg_all = border_size(ps, w, false);
XserverRegion reg_noframe = win_get_region_noframe(ps, w, false);
XFixesSubtractRegion(ps->dpy, reg_noframe, reg_all, reg_noframe);
XFixesSetPictureClipRegion(ps->dpy, tmp_picture, reg_noframe, 0, 0);
free_region(ps, &reg_all);
free_region(ps, &reg_noframe);
}
// Copy the content to tmp_picture, then copy back. The filter must
// be applied on tgt_buffer, to get the nearby pixels outside the
// window.
XRenderSetPictureFilter(ps->dpy, tgt_buffer, XRFILTER_CONVOLUTION, (XFixed *) convolution_blur, sizeof(convolution_blur) / sizeof(XFixed));
XRenderComposite(ps->dpy, PictOpSrc, tgt_buffer, None, tmp_picture, x, y, 0, 0, 0, 0, wid, hei);
xrfilter_reset(ps, tgt_buffer);
XRenderComposite(ps->dpy, PictOpSrc, tmp_picture, None, tgt_buffer, 0, 0, 0, 0, x, y, wid, hei);
free_picture(ps, &tmp_picture);
}
break;
#ifdef CONFIG_VSYNC_OPENGL
case BKEND_GLX:
glx_blur_dst(ps, x, y, wid, hei, ps->glx_z - 0.5, factor_center);
break;
#endif
default:
assert(0);
}
// Copy the content to tmp_picture, then copy back. The filter must
// be applied on tgt_buffer, to get the nearby pixels outside the
// window.
XRenderSetPictureFilter(ps->dpy, tgt_buffer, XRFILTER_CONVOLUTION, (XFixed *) convolution_blur, sizeof(convolution_blur) / sizeof(XFixed));
XRenderComposite(ps->dpy, PictOpSrc, tgt_buffer, None, tmp_picture, x, y, 0, 0, 0, 0, wid, hei);
xrfilter_reset(ps, tgt_buffer);
XRenderComposite(ps->dpy, PictOpSrc, tmp_picture, None, tgt_buffer, 0, 0, 0, 0, x, y, wid, hei);
free_picture(ps, &tmp_picture);
}
static void