Use new clutter_stage_set_paint_callback() function for after-paint notification

Commit 4f2bb583bf changed things so that the compositor used
clutter_threads_add_repaint_func_full (CLUTTER_REPAINT_FLAGS_POST_PAINT
to get after-paint notification and send _NET_WM_FRAME_DRAWN, but this
doesn't actually work, since Clutter will already have blocked for
VBlank before calling post-paint functions.

The result is that frame synced toolkits like GTK 3.8 will normally
only be able to draw every other frame.

Since ::paint doesn't work either, a new function
clutter_stage_set_paint_callback() has been added to Clutter
(and will be included in the 1.14 branch)

https://bugzilla.gnome.org/show_bug.cgi?id=698794

configure.ac

@@ -73,7 +73,7 @@ MUTTER_PC_MODULES="
    cairo >= 1.10.0
    gsettings-desktop-schemas >= 3.7.3
    xcomposite >= 0.2 xfixes xrender xdamage xi >= 1.6.0
-   $CLUTTER_PACKAGE >= 1.13.5
+   $CLUTTER_PACKAGE >= 1.14.3
    cogl-1.0 >= 1.13.3
 "
 

src/compositor/compositor.c

@@ -517,20 +517,20 @@ meta_check_end_modal (MetaScreen *screen)
     {
       meta_end_modal_for_plugin (screen,
                                    compositor->modal_plugin,
+
                                  CurrentTime);
     }
 }
 
-static gboolean
-after_stage_paint (gpointer data)
+static void
+after_stage_paint (ClutterStage *stage,
+                   gpointer      data)
 {
   MetaCompScreen *info = (MetaCompScreen*) data;
   GList *l;
 
   for (l = info->windows; l; l = l->next)
     meta_window_actor_post_paint (l->data);
-
-  return TRUE;
 }
 
 static void
@@ -611,9 +611,10 @@ meta_compositor_manage_screen (MetaCompositor *compositor,
 
   info->stage = clutter_stage_new ();
 
-  clutter_threads_add_repaint_func_full (CLUTTER_REPAINT_FLAGS_POST_PAINT,
+  clutter_stage_set_paint_callback (CLUTTER_STAGE (info->stage),
                                     after_stage_paint,
-                                         info, NULL);
+                                    info,
+                                    NULL);
 
   clutter_stage_set_sync_delay (CLUTTER_STAGE (info->stage), META_SYNC_DELAY);