[mutter/wip/garnacho/wayland-emulated-output-transform: 20/27] clutter: Hook up ClutterStageView render-to-texture

[Carlos Garnacho <carlosg src gnome org>]

commit f1a0985e3a7d2c20c25f9d9353ebc822e282ccb2
Author: Carlos Garnacho <carlosg gnome org>
Date:   Mon Aug 1 02:55:13 2016 +0200

    clutter: Hook up ClutterStageView render-to-texture
    
    "Blit" the result on the framebuffer after each view is painted.
    This of course only applies if there is an offscreen buffer to
    perform any blitting. Otherwise the onscreen framebuffer is rendered
    to directly.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=745079

 clutter/clutter/clutter-stage.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/clutter/clutter/clutter-stage.c b/clutter/clutter/clutter-stage.c
index edbc9b4..ea19cdc 100644
--- a/clutter/clutter/clutter-stage.c
+++ b/clutter/clutter/clutter-stage.c
@@ -676,6 +676,12 @@ clutter_stage_do_paint_view (ClutterStage                *stage,
   _clutter_stage_paint_volume_stack_free_all (stage);
   _clutter_stage_update_active_framebuffer (stage, framebuffer);
   clutter_actor_paint (CLUTTER_ACTOR (stage));
+
+  if (clutter_stage_view_get_onscreen (view) !=
+      clutter_stage_view_get_framebuffer (view))
+    {
+      clutter_stage_view_blit_offscreen (view, clip);
+    }
 }
 
 /* This provides a common point of entry for painting the scenegraph