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is any card support floating fbo/pbo blending?

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i am wondering... my x800 gto only support floating point fbo for non-blending rendering. or has anybody worked around this problem?

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Floating point framebuffer blending is only supported on X1x00 series cards or above (or Geforce 6 series or above).

Your only option on other cards is to emulate it with two framebuffers that you "ping pong" between. This solution isn't very optimal though and will probably be slow and/or error-prone.

The only other thing to do is to use a non-floating point format, but depending on your needs this may not do the job.

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I've tried a 6800 U card with the latest driver, but it doesnt work.
Anybody can tell exactly which card support floating point fbo blending?

anyway, thank for andy's suggestion.

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Quote:
Original post by suez
I've tried a 6800 U card with the latest driver, but it doesnt work.

It only works for fp16 (16-bit float) surfaces on both ATI and NVIDIA. I suspect that it also only works with 1 or 4-component float buffers (i.e. 1xfp16 and 4xfp16).

You can see specifically what the various architectures support by looking in the programming guides available on ATI's and NVIDIA's developer sites (and in their SDKs).


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