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View Full Version : Radeon 9700 problem with blending on 64bit rgba non-float pbuffers ?



dreld
05-20-2003, 11:32 PM
Hi!
Has anyone managed to get blending running on a Radeon 9700 in a pbuffer with more than the usual 8bit/channel (non-float)? With both 3.2
and 3.4 the pbuffer behaves as if blending was
disabled when I change the pixelformat.

cheers,
dreld

Humus
05-20-2003, 11:43 PM
The hardware only supports blending on 32bit (or less) texture formats, which kinda surprised me too when I first hit on this thing. Probably related to some internal bus width or something like that. You can have blending on RG16, but not on RGBA16.

dreld
05-20-2003, 11:52 PM
Do you know if that's the same for NVIDIA
GeForce FX cards?

PS: However, it's good to know that it's working for RG16, this will do the job for now for me, thanks!