[Chromium-users] Texture Combine not supported? Why?

[James S. <arr...@gm...>]

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?

Thank you for your time,
James Steven Supancic III