[clutter] clutter-actor: Add a debug flag for disabling offscreen redirect

[Neil Roberts <nroberts src gnome org>]

commit 1e2e0f21b86857354450beb7da78eb0fbbc95c06
Author: Neil Roberts <neil linux intel com>
Date:   Mon Jun 6 18:22:20 2011 +0100

    clutter-actor: Add a debug flag for disabling offscreen redirect
    
    This adds CLUTTER_PAINT=disable-offscreen-redirect to help diagnose
    problems with the correct opacity changes. This just makes it so that
    it never installs the flatten effect so it will never automatically
    redirect an actor offscreen.

 clutter/clutter-actor.c |    4 ++++
 clutter/clutter-debug.h |    3 ++-
 clutter/clutter-main.c  |    3 ++-
 3 files changed, 8 insertions(+), 2 deletions(-)
---
diff --git a/clutter/clutter-actor.c b/clutter/clutter-actor.c
index 81ba12b..bf34d32 100644
--- a/clutter/clutter-actor.c
+++ b/clutter/clutter-actor.c
@@ -2700,6 +2700,10 @@ needs_flatten_effect (ClutterActor *self)
 {
   ClutterActorPrivate *priv = self->priv;
 
+  if (G_UNLIKELY (clutter_paint_debug_flags &
+                  CLUTTER_DEBUG_DISABLE_OFFSCREEN_REDIRECT))
+    return FALSE;
+
   switch (priv->offscreen_redirect)
     {
     case CLUTTER_OFFSCREEN_REDIRECT_AUTOMATIC_FOR_OPACITY:
diff --git a/clutter/clutter-debug.h b/clutter/clutter-debug.h
index f3ee805..9ee1e44 100644
--- a/clutter/clutter-debug.h
+++ b/clutter/clutter-debug.h
@@ -39,7 +39,8 @@ typedef enum {
   CLUTTER_DEBUG_DISABLE_CLIPPED_REDRAWS = 1 << 1,
   CLUTTER_DEBUG_REDRAWS                 = 1 << 2,
   CLUTTER_DEBUG_PAINT_VOLUMES           = 1 << 3,
-  CLUTTER_DEBUG_DISABLE_CULLING         = 1 << 4
+  CLUTTER_DEBUG_DISABLE_CULLING         = 1 << 4,
+  CLUTTER_DEBUG_DISABLE_OFFSCREEN_REDIRECT = 1 << 5
 } ClutterDrawDebugFlag;
 
 #ifdef CLUTTER_ENABLE_DEBUG
diff --git a/clutter/clutter-main.c b/clutter/clutter-main.c
index b7a63f4..934ca26 100644
--- a/clutter/clutter-main.c
+++ b/clutter/clutter-main.c
@@ -180,7 +180,8 @@ static const GDebugKey clutter_paint_debug_keys[] = {
   { "disable-clipped-redraws", CLUTTER_DEBUG_DISABLE_CLIPPED_REDRAWS },
   { "redraws", CLUTTER_DEBUG_REDRAWS },
   { "paint-volumes", CLUTTER_DEBUG_PAINT_VOLUMES },
-  { "disable-culling", CLUTTER_DEBUG_DISABLE_CULLING }
+  { "disable-culling", CLUTTER_DEBUG_DISABLE_CULLING },
+  { "disable-offscreen-redirect", CLUTTER_DEBUG_DISABLE_OFFSCREEN_REDIRECT }
 };
 
 #ifdef CLUTTER_ENABLE_PROFILE