queued. svn path=/branches/work/kwin_composite/; revision=606788
and making it work even with XRender. I think it shows that making non-trivial effects for both OpenGL and XRender would be a) quite possible b) quite pain. svn path=/branches/work/kwin_composite/; revision=606271
still many TODO's. svn path=/branches/work/kwin_composite/; revision=605497