mutter/0001-iconcache-Avoid-xrender-picture-formats-when-creatin.patch

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From 80f79e0cc7509b79b38193a006b0d98d03432044 Mon Sep 17 00:00:00 2001
From: Ray Strode <rstrode@redhat.com>
Date: Mon, 5 Aug 2019 14:39:21 -0400
Subject: [PATCH] iconcache: Avoid xrender picture formats when creating cairo
surface
If an application provides its window icon via wmhints, then mutter
loads the pixmap specified by the application into a cairo xlib surface. When
creating the surface it specifies the visual, indirectly, via an XRender
picture format.
This is suboptimal, since XRender picture formats don't have a way to specify
16bpp depth, which an application may be using.
In particular, applications are likely to use 16bpp depth pixmaps for their
icons, if the video card offers a 16bpp framebuffer/root window.
This commit drops the XRender middleman, and just tells cairo a visual to use
directly.
https://gitlab.gnome.org/GNOME/mutter/merge_requests/715
---
src/x11/iconcache.c | 31 ++++++-------------------------
1 file changed, 6 insertions(+), 25 deletions(-)
diff --git a/src/x11/iconcache.c b/src/x11/iconcache.c
index 15d72da65..521c77b8d 100644
--- a/src/x11/iconcache.c
+++ b/src/x11/iconcache.c
@@ -261,97 +261,78 @@ get_pixmap_geometry (MetaX11Display *x11_display,
Pixmap pixmap,
int *w,
int *h,
int *d)
{
Window root_ignored;
int x_ignored, y_ignored;
guint width, height;
guint border_width_ignored;
guint depth;
if (w)
*w = 1;
if (h)
*h = 1;
if (d)
*d = 1;
XGetGeometry (x11_display->xdisplay,
pixmap, &root_ignored, &x_ignored, &y_ignored,
&width, &height, &border_width_ignored, &depth);
if (w)
*w = width;
if (h)
*h = height;
if (d)
*d = depth;
}
-static int
-standard_pict_format_for_depth (int depth)
-{
- switch (depth)
- {
- case 1:
- return PictStandardA1;
- case 24:
- return PictStandardRGB24;
- case 32:
- return PictStandardARGB32;
- default:
- g_assert_not_reached ();
- }
- return 0;
-}
-
-static XRenderPictFormat *
-pict_format_for_depth (Display *xdisplay, int depth)
-{
- return XRenderFindStandardFormat (xdisplay, standard_pict_format_for_depth (depth));
-}
-
static cairo_surface_t *
surface_from_pixmap (Display *xdisplay, Pixmap xpixmap,
int width, int height)
{
Window root_return;
+ XVisualInfo visual_info;
int x_ret, y_ret;
unsigned int w_ret, h_ret, bw_ret, depth_ret;
if (!XGetGeometry (xdisplay, xpixmap, &root_return,
&x_ret, &y_ret, &w_ret, &h_ret, &bw_ret, &depth_ret))
return NULL;
- return cairo_xlib_surface_create_with_xrender_format (xdisplay, xpixmap, DefaultScreenOfDisplay (xdisplay),
- pict_format_for_depth (xdisplay, depth_ret), w_ret, h_ret);
+ if (!XMatchVisualInfo (xdisplay, DefaultScreen (xdisplay),
+ depth_ret, TrueColor, &visual_info))
+ return NULL;
+
+ return cairo_xlib_surface_create (xdisplay, xpixmap, visual_info.visual, w_ret, h_ret);
}
static gboolean
try_pixmap_and_mask (MetaX11Display *x11_display,
Pixmap src_pixmap,
Pixmap src_mask,
cairo_surface_t **iconp)
{
Display *xdisplay = x11_display->xdisplay;
cairo_surface_t *icon, *mask = NULL;
int w, h, d;
if (src_pixmap == None)
return FALSE;
meta_x11_error_trap_push (x11_display);
get_pixmap_geometry (x11_display, src_pixmap, &w, &h, &d);
icon = surface_from_pixmap (xdisplay, src_pixmap, w, h);
if (icon && src_mask != None)
{
get_pixmap_geometry (x11_display, src_mask, &w, &h, &d);
if (d == 1)
mask = surface_from_pixmap (xdisplay, src_mask, w, h);
}
meta_x11_error_trap_pop (x11_display);
--
2.21.0