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gdk: Make sure we don't copy to/from layered regions when moving a window

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This commit is contained in:
Alexander Larsson
2011-12-01 16:27:37 +01:00
parent 46d5b89830
commit 0f6784a919
1 changed files with 19 additions and 3 deletions
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22
gdk/gdkwindow.c
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@ -5979,7 +5979,7 @@ gdk_window_move_resize_internal (GdkWindow *window,
gint width,
gint height)
{
cairo_region_t *old_region, *new_region, *copy_area;
cairo_region_t *old_region, *old_layered, *new_region, *copy_area;
cairo_region_t *old_native_child_region, *new_native_child_region;
GdkWindow *impl_window;
GdkWindowImplClass *impl_class;
@ -6012,6 +6012,7 @@ gdk_window_move_resize_internal (GdkWindow *window,
expose = FALSE;
old_region = NULL;
old_layered = NULL;
impl_window = gdk_window_get_impl_window (window);
@ -6025,8 +6026,10 @@ gdk_window_move_resize_internal (GdkWindow *window,
expose = TRUE;
old_region = cairo_region_copy (window->clip_region);
/* Adjust region to parent window coords */
old_layered = cairo_region_copy (window->layered_region);
/* Adjust regions to parent window coords */
cairo_region_translate (old_region, window->x, window->y);
cairo_region_translate (old_layered, window->x, window->y);
old_native_child_region = collect_native_child_region (window, TRUE);
if (old_native_child_region)
@ -6106,7 +6109,19 @@ gdk_window_move_resize_internal (GdkWindow *window,
* Everything in the old and new regions that is not copied must be
* invalidated (including children) as this is newly exposed
*/
copy_area = cairo_region_copy (new_region);
if (window->has_alpha_background)
copy_area = cairo_region_create (); /* Copy nothing for alpha windows */
else
copy_area = cairo_region_copy (new_region);
/* Don't copy from a previously layered region */
cairo_region_translate (old_layered, dx, dy);
cairo_region_subtract (copy_area, old_layered);
/* Don't copy into a layered region */
cairo_region_translate (copy_area, -window->x, -window->y);
cairo_region_subtract (copy_area, window->layered_region);
cairo_region_translate (copy_area, window->x, window->y);
cairo_region_union (new_region, old_region);
@ -6155,6 +6170,7 @@ gdk_window_move_resize_internal (GdkWindow *window,
gdk_window_invalidate_region_full (window->parent, new_region, TRUE, CLEAR_BG_ALL);
cairo_region_destroy (old_region);
cairo_region_destroy (old_layered);
cairo_region_destroy (new_region);
}