From ecdf62d63eee50c7655e82bf16da157c998e4529 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jonas=20Dre=C3=9Fler?= <verdre@v0yd.nl>
Date: Thu, 12 Mar 2020 13:33:25 +0100
Subject: [PATCH] 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 039eebf46..0eb1868ab 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));
 }