[mutter] wayland/actor-surface: Call ensure_size_valid() on shaped-texture

[Marge Bot <marge-bot src gnome org>]

commit a09c9142302f7dfc9898f2c5cd9ff73b230255ca
Author: Robert Mader <robert mader posteo de>
Date:   Tue Mar 23 14:01:13 2021 +0100

    wayland/actor-surface: Call ensure_size_valid() on shaped-texture
    
    Use the new API to make sure the shaped texture has a valid size
    during the next layout phase.
    
    This is needed here because, quoting the previous commit:
    
    When the texture size is invalidated using `invalidate_size()`, the new
    size will only get calculated the next time `update_size()` is
    called. This happens e.g. in `meta_shaped_texture_get_preferred_size()`
    via `ensure_size_valid()`.
    
    `update_size()` can chain up to `clutter_content_invalidate_size()`
    as well as emitting a `size-changed` signal. If this happens during
    layout, the result is a 'change the layout conditions during layout'
    issue, causing heavy breakage in e.g. the Shell overview.
    
    To fix this, expose `ensure_size_valid()` as API so callers can make
    sure the texture has a valid size without creating redundant size
    invalidations calls.
    
    Note that if a buffer with a new size is attached we already trigger
    `update_size()` explicitely, avoiding such situations.
    
    Closes https://gitlab.gnome.org/GNOME/mutter/-/issues/1718
    
    Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1799>

 src/wayland/meta-wayland-actor-surface.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/src/wayland/meta-wayland-actor-surface.c b/src/wayland/meta-wayland-actor-surface.c
index 50af540a23..797795f861 100644
--- a/src/wayland/meta-wayland-actor-surface.c
+++ b/src/wayland/meta-wayland-actor-surface.c
@@ -271,6 +271,8 @@ meta_wayland_actor_surface_real_sync_actor_state (MetaWaylandActorSurface *actor
       meta_surface_actor_reset_viewport_dst_size (surface_actor);
     }
 
+  meta_shaped_texture_ensure_size_valid (stex);
+
   META_WAYLAND_SURFACE_FOREACH_SUBSURFACE (surface, subsurface_surface)
     {
       MetaWaylandActorSurface *actor_surface;