>So, how do you delay the flip-blit to the vblank but NOT delay other >rendering?
You would delay rendering from that ring. There are 2 rings on i810 (Only one gets used by XFree/DRM). Depending on what you are trying to achieve, that may be what you want. If you used an interrupt to indicate vblank, and expected to do a Blit at that time, how would you get your blit to happen ASAP? You May have quite a lot of stuff in the ring buffer ahead of the blit, And therefore you cannot know that it will happen within the blank. To solve that problem you'd have to use the second ring bufffer, it Gets priority and would make sure your blit happened next....but If you were going to do that you would have been better off putting A "wait for Vblank; blit" in that ring to begin with and saved Yourself the trouble. Also, doing your blit asynchronous to the main command stream leads to command order problems. Usually you want to insure that all prior commands were done before the blit and that no following commands have started. All your following commands have to wait anyway so it isn't a big deal that the whole ring is stalled. If you've got multiple threads drawing totally different things then, you're right, stalling the ring would impact overall performance. -Matt ------------------------------------------------------- This sf.net email is sponsored by: With Great Power, Comes Great Responsibility Learn to use your power at OSDN's High Performance Computing Channel http://hpc.devchannel.org/ _______________________________________________ Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
