Geforce 4: No GL_EXT_blend_func_separate ?? [Archive] - OpenGL Discussion and Help Forums

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Jan

08-15-2003, 06:12 AM

I just read about that extension and thought "damn, that´s what you need"!
But when i check the extension string, this extension does not show up! On a Geforce 4200 with 45.23 drivers.
Why? I could really use that extension. Which cards do support it?
I always thought this extension is quite old and should be implemented in all cards, but certainly i am wrong.

I am disappointed.
Jan.

Bob

08-15-2003, 06:59 AM

BlendFuncSeparate is a part of the core (maybe the imaging subset, not sure).

JanHH

08-15-2003, 08:05 AM

this extension is not hardware accelerated on gf4 ti, I tried it too and this was the sad result. I worked around it with using opacity weighted colors and blend func GL_ONE, GL_ONE_MINUS_SRC_ALPHA (I need the color values blended, but the alpha values added, for rendering my cloud impostor textures with destination alpha).