[mutter/gbsneto/window-screencast-fixes: 5/8] window-stream-src: Finish framebuffer after blitting

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

commit 9ba237bf8888b5812036370a816216c614091dc8
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Mon Mar 16 19:31:25 2020 -0300

    window-stream-src: 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/backends/meta-screen-cast-window-stream-src.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/backends/meta-screen-cast-window-stream-src.c 
b/src/backends/meta-screen-cast-window-stream-src.c
index 401f6e283..b1221ad6b 100644
--- a/src/backends/meta-screen-cast-window-stream-src.c
+++ b/src/backends/meta-screen-cast-window-stream-src.c
@@ -492,6 +492,8 @@ meta_screen_cast_window_stream_src_blit_to_framebuffer (MetaScreenCastStreamSrc
       break;
     }
 
+  cogl_framebuffer_finish (framebuffer);
+
   return TRUE;
 }