Hmm, seems there might be a Mir bug at play --> bug 1281938
But that doesn't change the fact that all compositors need to call should_be_rendered_in() to cull the list of surfaces that gets rendered.
Hmm, seems there might be a Mir bug at play --> bug 1281938
But that doesn't change the fact that all compositors need to call should_ be_rendered_ in() to cull the list of surfaces that gets rendered.