st/theme-node-transition: Guard against 0-sized offscreen box

We know beforehand that setting up the framebuffers will fail in
that case, so we can avoid cluttering the log with warnings.

(Although the warning would likely indicate a stylesheet bug)

https://gitlab.gnome.org/GNOME/gnome-shell-extensions/-/issues/289

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2326>

diff --git a/src/st/st-theme-node-transition.c b/src/st/st-theme-node-transition.c
index 61199b437ebbece353698e9174fe6956c6dae53e..20b1476d2d43e046a75e99b751e323462af45747 100644 (file)
--- a/src/st/st-theme-node-transition.c
+++ b/src/st/st-theme-node-transition.c
@@ -369,7 +369,8 @@ st_theme_node_transition_paint (StThemeNodeTransition *transition,
       priv->last_allocation = *allocation;
 
       calculate_offscreen_box (transition, allocation);
-      priv->needs_setup = !setup_framebuffers (transition, allocation,
+      priv->needs_setup = clutter_actor_box_get_area (&priv->offscreen_box) == 0 ||
+                          !setup_framebuffers (transition, allocation,
                                                resource_scale);
 
       if (priv->needs_setup) /* setting up framebuffers failed */