[Piglit] Reworked textureSize and texelFetch tests

[Ian Romanick]

On 12/06/2011 01:23 PM, Kenneth Graunke wrote:
> I've reworked the tests quite a bit, adding new common.[ch] files for
> code useful in both tests (and hopefully more new tests in the future).
> While the line count didn't go down, I feel that the tests are a lot
> simpler now.  A lot of close-but-not-quite copies of code are gone now.
>
> Other fixes:
> - Require GL 3.0 for depth cube maps
> - Require GL_EXT_texture_integer for integer formats
> - Require GL_EXT_texture_array for array samplers.
> - Preliminary framework for sampler2DRect and samplerCubeArray.
> - In texelFetch, actually mark the test as FAIL if probes are wrong.
> - In textureSize, use proper integer internal formats.
> - Use asprintf instead of fixed size buffers (thanks Jose!)
>
> Also, I added support for GL_EXT_texture_swizzle to the texelFetch test.
>
> Feedback welcome.  Ideally I'd like to push these this week.

Patches 2, 3, and 4 v2 are

Reviewed-by: Ian Romanick <ian.d.romanick at intel.com>

I posted some comments about patch 1.