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Don't unnecessarily expose areas copied by native windowing system

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When moving or scrolling a window with native children, there is no
need to expose the areas that are copied by the windowing system
as part of moving/resizing the native windows anyway.
This commit is contained in:
Alexander Larsson 2009-11-03 14:47:31 +01:00
parent a299797883
commit 4cd5c98942
1 changed files with 15 additions and 0 deletions
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15
gdk/gdkwindow.c
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@ -7243,6 +7243,7 @@ gdk_window_move_resize_internal (GdkWindow *window,
native windows, as we can't read that data */
gdk_region_offset (new_native_child_region, dx, dy);
gdk_region_subtract (copy_area, new_native_child_region);
gdk_region_offset (new_native_child_region, -dx, -dy);
}
gdk_region_subtract (new_region, copy_area);
@ -7260,6 +7261,13 @@ gdk_window_move_resize_internal (GdkWindow *window,
* We also invalidate any children in that area, which could include
* this window if it still overlaps that area.
*/
if (old_native_child_region)
{
/* No need to expose the region that the native window move copies */
gdk_region_offset (old_native_child_region, dx, dy);
gdk_region_intersect (old_native_child_region, new_native_child_region);
gdk_region_subtract (new_region, old_native_child_region);
}
gdk_window_invalidate_region (GDK_WINDOW (private->parent), new_region, TRUE);
gdk_region_destroy (old_region);
@ -7453,6 +7461,13 @@ gdk_window_scroll (GdkWindow *window,
move_region_on_impl (impl_window, copy_area, dx, dy); /* takes ownership of copy_area */
/* Invalidate not copied regions */
if (old_native_child_region)
{
/* No need to expose the region that the native window move copies */
gdk_region_offset (old_native_child_region, dx, dy);
gdk_region_intersect (old_native_child_region, new_native_child_region);
gdk_region_subtract (noncopy_area, old_native_child_region);
}
gdk_window_invalidate_region (window, noncopy_area, TRUE);
gdk_region_destroy (noncopy_area);