070cd27786
The spec says: "A server should avoid signalling the frame callbacks if the surface is not visible in any way, e.g. the surface is off-screen, or completely obscured by other opaque surfaces." We actually do have the information to do that but we are always calling the frame callbacks in after_stage_paint. So fix that to only call when when the surface gets drawn on screen. https://bugzilla.gnome.org/show_bug.cgi?id=739163