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gdk: add alpha to the offscreen window's surface if its visual is RGBA

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This commit is contained in:
Michael Natterer 2010-10-20 17:44:23 +02:00
parent c2f29f2cef
commit 0f2d1547f8
1 changed files with 8 additions and 5 deletions
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13
gdk/gdkoffscreenwindow.c
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@ -156,16 +156,19 @@ _gdk_offscreen_window_create_surface (GdkWindow *offscreen,
GdkWindowObject *private = (GdkWindowObject *) offscreen;
cairo_surface_t *similar;
cairo_surface_t *surface;
cairo_content_t content = CAIRO_CONTENT_COLOR;
g_return_val_if_fail (GDK_IS_OFFSCREEN_WINDOW (private->impl), NULL);
similar = _gdk_drawable_ref_cairo_surface ((GdkWindow *)private->parent);
surface = cairo_surface_create_similar (similar,
/* FIXME: use visual */
CAIRO_CONTENT_COLOR,
width,
height);
if (gdk_window_get_visual (offscreen) ==
gdk_screen_get_rgba_visual (gdk_window_get_screen (offscreen)))
{
content = CAIRO_CONTENT_COLOR_ALPHA;
}
surface = cairo_surface_create_similar (similar, content, width, height);
cairo_surface_destroy (similar);