[cairo] Further cairo GL/GLES2 work

[Alexandros Frantzis]

On Tue, May 10, 2011 at 09:53:54AM +0100, Chris Wilson wrote:
> Alexandros, thank you for you work on bring GLES to cairo-gl! I've just
> caught with your last patchset and pushed it out. Nicely done.

Hi Chris!

Thanks for finding the time to review and merge this patchset (and also
for your improvements)!

> Obviously Eric and myself have a vendor bias, neither of us can move
> without tripping over a stack of machines with Intel graphics, and so our
> focus is on fixing those stacks. I've just about completed a cycle of
> improvements to the ddx and so will see if I can apply any of the lessons
> learnt there elsewhere.

Improving the stack is, of course, of prime importance. Unfortunately,
in the embedded world there is a lack of free drivers, so we can't work
on them directly. We will, however, promote the use of cairo traces with
the gles2 backend as test cases for the various vendors' 3D driver
stacks.

I will personally focus on more high level optimizations, additionally
guided by observations made further down the stack. So, if while working
at the driver level someone discovers an issue that is worth being fixed
in the cairo-gl backend level, I would be glad to take a look.

Thanks,
Alexandros