Re: Texture Combine not supported? Why?

James Supancic wrote:
> Texture Combine not supported? Why?
> 
> I have an OpenGL program that isn't rendering properly, the print SPU
> tells me that it is calling:
> TexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_RGB, GL_TEXTURE )
> TexEnvi( GL_TEXTURE_ENV, GL_OPERAND0_RGB, GL_SRC_COLOR )
> TexEnvi( GL_TEXTURE_ENV, GL_SOURCE1_RGB, GL_PRIMARY_COLOR )
> TexEnvi( GL_TEXTURE_ENV, GL_OPERAND1_RGB, GL_SRC_COLOR )
> TexEnvi( GL_TEXTURE_ENV, GL_COMBINE_RGB, GL_MODULATE )
> TexEnvi( GL_TEXTURE_ENV, GL_RGB_SCALE, GL_LINES )
> TexEnvi( GL_TEXTURE_ENV, GL_SOURCE0_ALPHA, GL_TEXTURE )
> TexEnvi( GL_TEXTURE_ENV, GL_OPERAND0_ALPHA, GL_SRC_ALPHA )
> TexEnvi( GL_TEXTURE_ENV, GL_SOURCE1_ALPHA, GL_PRIMARY_COLOR  )
> TexEnvi( GL_TEXTURE_ENV, GL_OPERAND1_ALPHA, GL_SRC_ALPHA )
> TexEnvi( GL_TEXTURE_ENV, GL_COMBINE_ALPHA, GL_MODULATE )
> TexEnvi( GL_TEXTURE_ENV, GL_ALPHA_SCALE, GL_LINES )
> 
> I noticed that the Chromium documentation says
> "Texture Combine test (Test number #85) not supported (not an error)."
> 
> I noticed that the above shows that the program is setting the
> GL_COMBINE_RGB and GL_COMBINE_ALPHA.
> 
> Could the problem with my program be related to the lack of support
> for Texture Combine? If yes, why isn't this supported?

GL_ARB_texture_env_combine is supported.  The results from the 
conformance tests haven't been updated in quite a while.

-Brian


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