ATI and GL_ARB_Imaging support

[Kapila De Silva]

Hi all,

I noticed, that wine checks for GL_ARB_imaging, before performing
operations like glBlendColor, glBlendEquation etc. However it appears
that the ATI drivers do not support this extension, though they do
support the blending operations.

I posted about this on the Rage3d linux driver boards, and the response
seems to suggest that it would be better to check for the individual
operations rather than the GL_ARB_imaging extension.

See bottom of http://rage3d.com/board/showthread.php?t=33814685

What do you guys think?

Kap.