[clutter/clutter-1.14] image: Do not premultiply the blend color

[Emmanuele Bassi <ebassi src gnome org>]

commit 3b0bd7e47cb3370cc71a6a39e4fa19e8b25e9be9
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Thu Oct 10 13:31:50 2013 +0100

    image: Do not premultiply the blend color
    
    ClutterTextureNode will do that for us when converting the ClutterColor
    to a CoglColor, so we can simply pass a white color with the correct
    alpha channel.

 clutter/clutter-image.c |    9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)
---
diff --git a/clutter/clutter-image.c b/clutter/clutter-image.c
index 7ae9839..9344114 100644
--- a/clutter/clutter-image.c
+++ b/clutter/clutter-image.c
@@ -121,9 +121,12 @@ clutter_image_paint_content (ClutterContent   *content,
   clutter_actor_get_content_scaling_filters (actor, &min_f, &mag_f);
   repeat = clutter_actor_get_content_repeat (actor);
 
-  color.red = paint_opacity;
-  color.green = paint_opacity;
-  color.blue = paint_opacity;
+  /* ClutterTextureNode will premultiply the blend color, so we
+   * want it to be white with the paint opacity
+   */
+  color.red = 255;
+  color.green = 255;
+  color.blue = 255;
   color.alpha = paint_opacity;
 
   node = clutter_texture_node_new (priv->texture, &color, min_f, mag_f);