[cairo] GL invert image for non-texture GL surface that does not support GLX_MESA_pack_invert

[Chris Wilson]

On Tue, 13 Mar 2012 20:21:44 +0000, "Henry (Yu) Song - SISA" <hsong at sisa.samsung.com> wrote:
> 
> Author: Henry Song <henry.song at samsung.com>
> Date:   Tue Mar 13 11:22:37 2012 -0700
> 
>     gl invert non-texture image when map_to_image for non-texture gl surface
>     that does not support GLX_MESA_pack_invert extension

Hmm, looks slow, so I tried a more direct approach. Can you check it
over?
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre