[cairo] [PATCH] gl: fix the same surface bug and cairo_glx_surface_t source surface bug

[Chris Wilson]

On Thu, 12 Jan 2012 00:23:11 +0800, Chuanbo Weng <strgnm at gmail.com> wrote:
> So we are going to support operation such as self-copy in
> gl backend, right?

Indeed, I just want a few moments reflection on the rammifactions of
going down this path...
(Usually it is the hordes of angry users spotting a slowdown...)
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre