We are doing some post processing of our frame buffer. We have a screen of 640x480 and are running on an ONYX2 Infinite Reality.
When we do the glCopyPixels to apply the effects, it takes about 10ms to complete, regardless of how many of few effects we are applying.
(copyPixels returns straight away, but it takes about 10ms to complete the process).
Is this normal? Can we make it faster? (We have tried disabling all of the obvious features but had no improvement).
Help would be very much appreciated.