[gnome-shell] shell-invert-lightness-effect: Fix Cogl deprecations

[Jasper St. Pierre <jstpierre src gnome org>]

commit 4de20272e569a651bfe79d9d6a79710281b3965d
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Fri Feb 20 17:01:38 2015 -0800

    shell-invert-lightness-effect: Fix Cogl deprecations

 src/shell-invert-lightness-effect.c |    8 +++-----
 1 files changed, 3 insertions(+), 5 deletions(-)
---
diff --git a/src/shell-invert-lightness-effect.c b/src/shell-invert-lightness-effect.c
index d70151b..b3a2ca4 100644
--- a/src/shell-invert-lightness-effect.c
+++ b/src/shell-invert-lightness-effect.c
@@ -122,6 +122,7 @@ shell_invert_lightness_effect_paint_target (ClutterOffscreenEffect *effect)
   ShellInvertLightnessEffect *self = SHELL_INVERT_LIGHTNESS_EFFECT (effect);
   ClutterActor *actor;
   guint8 paint_opacity;
+  CoglFramebuffer *fb = cogl_get_draw_framebuffer ();
 
   actor = clutter_actor_meta_get_actor (CLUTTER_ACTOR_META (effect));
   paint_opacity = clutter_actor_get_paint_opacity (actor);
@@ -131,11 +132,8 @@ shell_invert_lightness_effect_paint_target (ClutterOffscreenEffect *effect)
                               paint_opacity,
                               paint_opacity,
                               paint_opacity);
-  cogl_push_source (self->pipeline);
-
-  cogl_rectangle (0, 0, self->tex_width, self->tex_height);
-
-  cogl_pop_source ();
+  cogl_framebuffer_draw_rectangle (fb, self->pipeline,
+                                   0, 0, self->tex_width, self->tex_height);
 }
 
 static void