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[GdkWindowCache] Don't ignore the CompositeOverlayWindow

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Add the composite overlay window to the cache, as this can be a reasonable Xdnd proxy as well.

This is only done when the screen is composited in order to avoid mapping
the COW. We assume that the CM is using the COW (which is true for pretty
much any CM currently in use).

https://bugzilla.gnome.org/show_bug.cgi?id=601731
This commit is contained in:
Adel Gadllah 2010-09-13 18:20:22 +02:00
parent a79d6676ac
commit 85ae875dcb
1 changed files with 16 additions and 0 deletions
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16
gdk/x11/gdkdnd-x11.c
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@ -30,6 +30,7 @@
#include <X11/Xutil.h>
#include <X11/Xatom.h>
#include <X11/extensions/shape.h>
#include <X11/extensions/Xcomposite.h>
#include <string.h>
@ -537,6 +538,7 @@ gdk_window_cache_new (GdkScreen *screen)
GdkWindow *root_window = gdk_screen_get_root_window (screen);
GdkChildInfoX11 *children;
guint nchildren, i;
Window cow;
GdkWindowCache *result = g_new (GdkWindowCache, 1);
@ -585,6 +587,20 @@ gdk_window_cache_new (GdkScreen *screen)
g_free (children);
/*
* Add the composite overlay window to the cache, as this can be a reasonable
* Xdnd proxy as well.
* This is only done when the screen is composited in order to avoid mapping
* the COW. We assume that the CM is using the COW (which is true for pretty
* much any CM currently in use).
*/
if (gdk_screen_is_composited (screen))
{
cow = XCompositeGetOverlayWindow (xdisplay, GDK_WINDOW_XWINDOW (root_window));
gdk_window_cache_add (result, cow, 0, 0, gdk_screen_get_width (screen), gdk_screen_get_height (screen), TRUE);
XCompositeReleaseOverlayWindow (xdisplay, GDK_WINDOW_XWINDOW (root_window));
}
return result;
}