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MetaWindowActor: Skip paint optimization for actors with an effect

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The optimizations might not work for an actor with an effect, and
our clipped drawing interferes badly with the operation of
CoglOffscreenEffect.

https://bugzilla.gnome.org/show_bug.cgi?id=659523
This commit is contained in:
Adel Gadllah 2011-09-20 16:55:48 +02:00
parent c1368155fc
commit 7c6bc73031
1 changed files with 19 additions and 0 deletions
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19
src/compositor/meta-window-group.c
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@ -145,6 +145,25 @@ meta_window_group_paint (ClutterActor *actor)
if (!CLUTTER_ACTOR_IS_VISIBLE (l->data))
continue;
/* If an actor has effects applied, then that can change the area
* it paints and the opacity, so we no longer can figure out what
* portion of the actor is obscured and what portion of the screen
* it obscures, so we skip the actor.
*
* This has a secondary beneficial effect: if a ClutterOffscreenEffect
* is applied to an actor, then our clipped redraws interfere with the
* caching of the FBO - even if we only need to draw a small portion
* of the window right now, ClutterOffscreenEffect may use other portions
* of the FBO later. So, skipping actors with effects applied also
* prevents these bugs.
*
* Theoretically, we should check clutter_actor_get_offscreen_redirect()
* as well for the same reason, but omitted for simplicity in the
* hopes that no-one will do that.
*/
if (clutter_actor_get_effects (l->data) != NULL)
continue;
if (META_IS_WINDOW_ACTOR (l->data))
{
MetaWindowActor *window_actor = l->data;