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heppe
02-13-2004, 08:56 AM
Does anyone know what the performance expectations of glCopyPixels to and from pbuffers would be on Radeon?

We are looking for a replacement for wgl_arb_buffer_region/ktx_buffer_region, which ATI chose to reserve as a "maintain the profit margins of FireGL" feature.

NitroGL
02-13-2004, 10:02 AM
Which Radeon? It's pretty fast on my 9800 and 9700.

heppe
02-13-2004, 10:12 AM
9700 or 9800 is what I had in mind. How is the performance relative to reading stuff back into system memory with glReadPixels?

noisecrime
02-13-2004, 10:13 AM
Try this http://www.opengl.org/discussion_boards/ubb/Forum3/HTML/010964.html

and
http://www.chez.com/dedebuffer/

4 different sources to download and test - so you can form your own opinion.

Don't forget to post your results so others can learn from it.

NitroGL
02-13-2004, 02:04 PM
Originally posted by heppe:
9700 or 9800 is what I had in mind. How is the performance relative to reading stuff back into system memory with glReadPixels?

ReadPixels is below average, unfortantly.