[mutter/gbsneto/window-screencast-fixes: 1/4] window-actor: Finish framebuffer after blitting

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 8ab1a9eb6d0c224a0a205ef3fab84bda54c2bf26
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Mon Mar 16 19:31:25 2020 -0300

    window-actor: Finish framebuffer after blitting
    
    Just like what's done for monitor screencasting. Unfortunately, there's
    no mechanism to share fences with PipeWire clients yet, which forces
    us to guarantee that a frame is completed after blitting.
    
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/1129

 src/compositor/meta-window-actor.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/compositor/meta-window-actor.c b/src/compositor/meta-window-actor.c
index 32b85ed1f..d86e38fee 100644
--- a/src/compositor/meta-window-actor.c
+++ b/src/compositor/meta-window-actor.c
@@ -1322,6 +1322,8 @@ meta_window_actor_blit_to_framebuffer (MetaScreenCastWindow *screen_cast_window,
   cogl_framebuffer_pop_clip (framebuffer);
   cogl_framebuffer_pop_matrix (framebuffer);
 
+  cogl_framebuffer_finish (framebuffer);
+
   return TRUE;
 }