tree 277b44d809fde7fc4a2b66141f4d989641c11f7e
parent b605c06e2ac8354ab0607fd1898fdc68e16e4b14
author Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com> 1362497429 +0200
committer Kristian Høgsberg <krh@bitplanet.net> 1363655630 -0400

compositor: Don't rely on surface->clip to cull overlay obscured damage

Before this change, surface->clip would contain the region of this the
surface that is obscured by opaque containing of other surfaces in any
plane. If a surface was obscured only by a surface in another plane and
the renderer was told to draw that region, the rendering would be
clipped because of that.

This patch changes the clip to be plane specific, so that it contains
only the region of the surface obscured by other surfaces in the same
plane. We also calculate a per plane clip, so that we don't tell the
renderer to draw regions of the primary plane that are obscured by
other planes. This damage remains on the primary plane until the its
clip changes so that they are not obscured anymore.