[clutter/clutter-1.16] paint-nodes: Have a fallback buffer for the root node

[Emmanuele Bassi <ebassi src gnome org>]

commit bf1997c4ef83c658c3566574e8bdf01dd9120957
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Tue Aug 20 00:01:45 2013 +0100

    paint-nodes: Have a fallback buffer for the root node
    
    If we don't get passed a CoglFramebuffer when creating the root paint
    node then we ask Cogl to give us the current draw buffer.
    
    This allows the text-cache conformance test to pass, but it'll require
    further investigation.

 clutter/clutter-paint-nodes.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/clutter/clutter-paint-nodes.c b/clutter/clutter-paint-nodes.c
index 91bc91b..2b95d41 100644
--- a/clutter/clutter-paint-nodes.c
+++ b/clutter/clutter-paint-nodes.c
@@ -166,7 +166,11 @@ _clutter_root_node_new (CoglFramebuffer    *framebuffer,
                             clear_color->alpha);
   cogl_color_premultiply (&res->clear_color);
 
-  res->framebuffer = cogl_object_ref (framebuffer);
+  if (G_LIKELY (framebuffer != NULL))
+    res->framebuffer = cogl_object_ref (framebuffer);
+  else
+    res->framebuffer = cogl_object_ref (cogl_get_draw_framebuffer ());
+
   res->clear_flags = clear_flags;
 
   return (ClutterPaintNode *) res;