[glean-dev] texcombine again

[Gareth H. <ga...@va...>]

I'm seeing problems at 16bpp due to ARGB4444 textures being used for the
tests.  Again, the Radeon passes all ~500,000 tests at 32bpp, but fails
the first one at 16bpp.  Could we change the texture format so that
32bpp textures are used, irrespective of the framebuffer depth?  An
internal format of GL_RGBA8 should be enough.  Brian, your choice of
texColors should be fairly easy to convert into ubytes instead of
floats.  Objections?

-- Gareth