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gdk: Fix repaint of layered region during scroll

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This commit is contained in:
Alexander Larsson 2011-12-01 16:45:18 +01:00
parent f0c8c4a94b
commit 8e28f53a1d
1 changed files with 9 additions and 2 deletions
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11
gdk/gdkwindow.c
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@ -6266,7 +6266,7 @@ gdk_window_scroll (GdkWindow *window,
gint dy)
{
GdkWindow *impl_window;
cairo_region_t *copy_area, *noncopy_area;
cairo_region_t *copy_area, *noncopy_area, *old_layered_area;
cairo_region_t *old_native_child_region, *new_native_child_region;
GList *tmp_list;
@ -6280,6 +6280,7 @@ gdk_window_scroll (GdkWindow *window,
gdk_window_flush_if_exposing (window);
old_layered_area = cairo_region_copy (window->layered_region);
old_native_child_region = collect_native_child_region (window, FALSE);
if (old_native_child_region)
{
@ -6320,7 +6321,11 @@ gdk_window_scroll (GdkWindow *window,
impl_window = gdk_window_get_impl_window (window);
/* Calculate the area that can be gotten by copying the old area */
copy_area = cairo_region_copy (window->clip_region);
if (window->has_alpha_background)
copy_area = cairo_region_create (); /* Copy nothing for alpha windows */
else
copy_area = cairo_region_copy (window->clip_region);
cairo_region_subtract (copy_area, old_layered_area);
if (old_native_child_region)
{
/* Don't copy from inside native children, as this is copied by
@ -6334,6 +6339,7 @@ gdk_window_scroll (GdkWindow *window,
}
cairo_region_translate (copy_area, dx, dy);
cairo_region_intersect (copy_area, window->clip_region);
cairo_region_subtract (copy_area, window->layered_region);
/* And the rest need to be invalidated */
noncopy_area = cairo_region_copy (window->clip_region);
@ -6355,6 +6361,7 @@ gdk_window_scroll (GdkWindow *window,
gdk_window_invalidate_region_full (window, noncopy_area, TRUE, CLEAR_BG_ALL);
cairo_region_destroy (noncopy_area);
cairo_region_destroy (old_layered_area);
if (old_native_child_region)
{