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gdk: Fix alpha window background paintings on non-implicit paints

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This commit is contained in:
Alexander Larsson 2011-12-05 11:40:30 +01:00
parent 68843a3e93
commit 76ea768316
1 changed files with 14 additions and 0 deletions
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14
gdk/gdkwindow.c
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@ -2907,6 +2907,20 @@ gdk_window_begin_paint_region (GdkWindow *window,
gdk_window_get_content (window),
MAX (clip_box.width, 1),
MAX (clip_box.height, 1));
/* Normally alpha backgrounded client side windows are composited on the implicit paint
by being drawn in back to front order. However, if implicit paints are not used, for
instance if it was flushed due to a non-double-buffered paint in the middle of the
expose we need to copy in the existing data here. */
if (!gdk_window_has_impl (window) && window->has_alpha_background)
{
cairo_t *cr = cairo_create (paint->surface);
gdk_cairo_set_source_window (cr, impl_window,
- (window->abs_x + clip_box.x),
- (window->abs_y + clip_box.y));
cairo_paint (cr);
cairo_destroy (cr);
}
}
cairo_surface_set_device_offset (paint->surface, -clip_box.x, -clip_box.y);