We use textures bound to FBO's for everything in recent times.

Change-Id: I7c9068d75b3653a2ceff0056e2ade1f27955422f
Reviewed-on: https://gerrit.libreoffice.org/19995Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Michael Meeks <michael.meeks@collabora.com>