[Piglit] [PATCH] New testsuite for ARB_color_buffer_float (v2)

[Luca Barbieri]

> Your test results and success of the MRT test should imply that nVidia
> is not clamping *any* color buffer on FIXED_ONLY as long as at least
> one is floating point (since that's what the test checks for right
> now).

No, sorry, this is actually wrong, because we would need to see what
alpha test or polygon smoothing do to see whether it clamps
gl_FragData going to fixed point buffers, since the source color is
then clamped before blending on fixed point buffers (and then
obviously, clamped on the write).

This should ideally be added to the tests.