[mutter] xwayland: Update regions on texture updates

[Jonas Ådahl <jadahl src gnome org>]

commit 0b102afb5392c1a8f9d1b9ed7f20aceb1fdf84b2
Author: Olivier Fourdan <ofourdan redhat com>
Date:   Tue Mar 3 10:31:51 2020 +0100

    xwayland: Update regions on texture updates
    
    For X11 clients running on Wayland, the actual texture is set by
    Xwayland.
    
    The shape, input and opaque regions, however are driven by X11
    properties meaning that those may come at a different time than the
    actual update of the content.
    
    This results in black areas being visible at times on resize with
    Xwayland clients.
    
    To make sure we update all the regions at the same time the buffer is
    updated, update the shape, input and opaque regions when the texture is
    committed from when the Xwayland surface state is synchronized.
    
    That fixes the remaining black areas being sometimes visible when
    resizing client-side decorations windows on Xwayland.
    
    Closes: https://gitlab.gnome.org/GNOME/mutter/issues/1007
    https://gitlab.gnome.org/GNOME/mutter/merge_requests/1091

 src/wayland/meta-xwayland-surface.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)
---
diff --git a/src/wayland/meta-xwayland-surface.c b/src/wayland/meta-xwayland-surface.c
index 3233dcc26..4a4615a2c 100644
--- a/src/wayland/meta-xwayland-surface.c
+++ b/src/wayland/meta-xwayland-surface.c
@@ -232,7 +232,13 @@ meta_xwayland_surface_sync_actor_state (MetaWaylandActorSurface *actor_surface)
     META_WAYLAND_ACTOR_SURFACE_CLASS (meta_xwayland_surface_parent_class);
 
   if (xwayland_surface->window)
-    actor_surface_class->sync_actor_state (actor_surface);
+    {
+      MetaWindowActor *window_actor =
+        meta_window_actor_from_window (xwayland_surface->window);
+
+      actor_surface_class->sync_actor_state (actor_surface);
+      meta_window_actor_update_regions (window_actor);
+    }
 }
 
 static void