Another important case that isn't easily addressed by code in the context of DefaultDisplayBufferCompositor is when all the surfaces overlapping the view_area already have their latest buffer rendered. (This cannot be deduced from the SceneElement interface.)
Another important case that isn't easily addressed by code in the context of DefaultDisplayB ufferCompositor is when all the surfaces overlapping the view_area already have their latest buffer rendered. (This cannot be deduced from the SceneElement interface.)