[gnome-shell] st/viewport: Invalidate transform when it changes

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

commit ecdf62d63eee50c7655e82bf16da157c998e4529
Author: Jonas Dreßler <verdre v0yd nl>
Date:   Thu Mar 12 13:33:25 2020 +0100

    st/viewport: Invalidate transform when it changes
    
    Since ClutterActor now caches the whole transformation matrix for an
    actor, we need to invalidate the cached transform if the matrix returned
    by apply_transform() implementations changes.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1308

 src/st/st-viewport.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/src/st/st-viewport.c b/src/st/st-viewport.c
index 039eebf461..0eb1868ab9 100644
--- a/src/st/st-viewport.c
+++ b/src/st/st-viewport.c
@@ -78,6 +78,7 @@ adjustment_value_notify_cb (StAdjustment *adjustment,
                             GParamSpec   *pspec,
                             StViewport   *viewport)
 {
+  clutter_actor_invalidate_transform (CLUTTER_ACTOR (viewport));
   clutter_actor_queue_relayout (CLUTTER_ACTOR (viewport));
 }