[mutter/wip/carlosg/performance-improvements: 2/13] ClutterPaintNode: Avoid clearing the background on the root node

[Carlos Garnacho <carlosg src gnome org>]

commit 29c3e04784795ca41794ca8d4b0955c8a7d258c6
Author: Carlos Garnacho <carlosg gnome org>
Date:   Fri Apr 28 23:25:13 2017 +0200

    ClutterPaintNode: Avoid clearing the background on the root node
    
    The compositor will redraw over the whole thing, so it seems like
    we can avoid clearing the background entirely.

 clutter/clutter/clutter-paint-nodes.c |    6 ------
 1 files changed, 0 insertions(+), 6 deletions(-)
---
diff --git a/clutter/clutter/clutter-paint-nodes.c b/clutter/clutter/clutter-paint-nodes.c
index 3870ba6..bd417ce 100644
--- a/clutter/clutter/clutter-paint-nodes.c
+++ b/clutter/clutter/clutter-paint-nodes.c
@@ -111,12 +111,6 @@ G_DEFINE_TYPE (ClutterRootNode, clutter_root_node, CLUTTER_TYPE_PAINT_NODE)
 static gboolean
 clutter_root_node_pre_draw (ClutterPaintNode *node)
 {
-  ClutterRootNode *rnode = (ClutterRootNode *) node;
-
-  cogl_framebuffer_clear (rnode->framebuffer,
-                          rnode->clear_flags,
-                          &rnode->clear_color);
-
   return TRUE;
 }