[cairo] [PATCH] gl: Move glGetUniformLocation to shader compile time.

[Chris Wilson]

On Mon, Jun 24, 2013 at 11:28:47PM -0700, Eric Anholt wrote:
> The lookup of the string names has significant overhead, which is why GL
> gives you glGetUniformLocation so that you reference uniforms by
> constant integers in your high performance path.
> 
> Reduces cairo-perf-trace runtime of firefox-planet-gnome by 1.06767% +/-
> 0.289265% (n=72) on my IVB macbook air.

Tested on a variety of machines, nouveau/nvidia, radeon/fglrx and intel.
Only on Haswell did I see a significant improvement - but out of
proportion with reduction in CPU overhead here, so likely a secondary
affect.

Patch looks ok, I was just quibbling over whether using an id enum and a
single location array would make the callers more readable.

Reviewed and pushed, thanks.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre