[Piglit] genmipmap-errors test

[Brian Paul]

Anuj,

Your genmipmap-errors test checks if glGenerateMipmaps raises 
GL_INVALID_OPERATION for integer and depth/stencil texture formats.

Can you tell me which version of the GL spec or extension describes this?

genmipmap-errors fails with NVIDIA's OpenGL 4.2 since it does not raise 
any errors for glGenerateMipmaps(integer texture).

I'm wondering if that error check was lifted in some version of GL.

The man page at 
http://www.opengl.org/sdk/docs/man/xhtml/glGenerateMipmap.xml doesn't 
say that integer textures should raise an error.

I seem to remember some ARB discussion about the validity of integer 
mipmap generation but I don't remember the outcome.

-Brian