Is there any reason why glReadPixels should be slow when reading from pbuffers ?
I’m experiencing massive slowdown when reading from pbuffer vs backbuffer.
[Edit]
1.I’m reading the stencil buffer.
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For standard pBuffers, when using RTT rather than copy/bind the glReadPixels is slow.
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For 32bit floating point pbuffers I would expect the readpixels to take 4 times as long, but I’m finding it’s about 30x slower.
Nvidia Quadro FX 42.86 drivers.
[This message has been edited by pocketmoon (edited 02-17-2003).]