[Piglit] Faster piglit with probe_rect_*

[Brian Paul]

On 09/28/2010 08:37 PM, Marek Olšák wrote:
> Hi,
>
> I've optimized piglit by reducing the number of glReadPixels calls in
> tests which probe from hundreds to hundreds of thousands of pixels (the
> fbo tests are the worst ones). It touches shader_runner and 26 other
> tests. The quick-driver.tests profile is significantly faster now
> (especially for GPUs which store framebuffers in VRAM). If there are no
> concerns, I'll merge this on thursday evening CEST.
>
> The commits can be read here:
> http://cgit.freedesktop.org/~mareko/piglit/log/?h=probe-rect

Nice!  I had noticed that piglit_probe_rect_rgba() was pretty bad. 
Glad you took care of this.

-Brian