No RGB non-RGBA formats exposed for EGLConfigs.

[GoogleCodeExporter]

All R8G8B8 configs have A8 in EGLConfigs.
This makes it impossible to get an RGBX PBuffer.

In Firefox, I suppose we'll work around this with colorMask(1,1,1,0) instead, 
but this seems more prone to performance issues.

Original issue reported on code.google.com by jda...@gmail.com on 1 Oct 2014 at 12:14

[GoogleCodeExporter]

Hey jdashg,

D3D11 doesn't have an R8G8B8 format, see:

http://msdn.microsoft.com/en-us/library/windows/desktop/bb173059(v=vs.85).aspx

Can you explain the use case? That'll help understand what we would implement 
in D3D11.

Original comment by jmad...@chromium.org on 1 Oct 2014 at 2:19