ee507d9ab2
In a multi-monitor setup there is a separate paint run for each monitor. If an actor doesn't intersect the first monitor painted then it is culled out for that monitor to save time. Unfortunately this would mean `clutter_actor_paint` was setting `is_dirty = FALSE` before the actor had yet been painted on any monitor. This meant that effects like `ClutterOffscreenEffect` were not receiving the flag `CLUTTER_EFFECT_PAINT_ACTOR_DIRTY` when they should have, and so would rightfully think they don't need to do a full internal invalidation. So `ClutterOffscreenEffect`, and probably other effects, did not repaint correctly unless on the first monitor in the list. The fix is to simply avoid setting `is_dirty = FALSE` on those paint runs where the actor has been culled out (`clutter_actor_continue_paint` wasn't called). It is only safe to clear the flag after `clutter_actor_continue_paint` has been called at least once per stage paint. Closes: https://gitlab.gnome.org/GNOME/gnome-shell/issues/1049 https://gitlab.gnome.org/GNOME/mutter/merge_requests/511 |
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