View Full Version : ATI Radeon does not support multisampling in PBuffer!?

05-20-2003, 07:23 AM

I did some experimentation and it seems to me that the
WGL_SAMPLE_BUFFERS_ARB attribute does only work for pixel format descriptors
if in conjunction with attribute WGL_DRAW_TO_WINDOW_ARB and not

Does anybody have experience with antialiased PBuffers on Radeon cards?

PS: I have tried this on a Radeon 9800 Pro.

05-20-2003, 07:46 AM
One possible implementation of antialiasing puts more than one sample into the frame buffer, and then reads more than one sample out into the DAC, and the actual anti-aliasing blend happens on scan conversion.

If that were the implementation, then I could see very easily how it wouldn't work in a pbuffer -- there's no DAC to blend the samples for you.

05-20-2003, 07:57 AM
Radeons doesn't do it that way though.

05-20-2003, 07:21 PM
Maybe I should mention that I never had problems doing this on GeForce 3/4 cards...