Set the IN_PAINT private flag

When calling clutter_actor_paint() we should be setting the
CLUTTER_ACTOR_IN_PAINT private flag. This allows signalling
to each Actor subclass that we are effectively in the middle
of a paint sequence. Actor subclasses can check for this
private flag and act based on its presence - for instance to
avoid recursion, or to detect performance degradation cases.

diff --git a/clutter/clutter-actor.c b/clutter/clutter-actor.c
index 4241444..b3567e8 100644 (file)
--- a/clutter/clutter-actor.c
+++ b/clutter/clutter-actor.c
@@ -1453,6 +1453,9 @@ clutter_actor_paint (ClutterActor *self)
        }
     }
 
+  /* mark that we are in the paint process */
+  CLUTTER_SET_PRIVATE_FLAGS (self, CLUTTER_ACTOR_IN_PAINT);
+
   cogl_push_matrix();
 
   _clutter_actor_apply_modelview_transform (self);
@@ -1492,6 +1495,9 @@ clutter_actor_paint (ClutterActor *self)
     cogl_clip_unset();
 
   cogl_pop_matrix();
+
+  /* paint sequence complete */
+  CLUTTER_UNSET_PRIVATE_FLAGS (self, CLUTTER_ACTOR_IN_PAINT);
 }
 
 /* fixed point, unit based rotation setter, to be used by