On Thu, 10 Feb 2005 21:59:29 -0500, Owen Taylor <[EMAIL PROTECTED]> wrote: > That should allow a straight-copy from data you create to memory card > the can texture from, which is about as good as possible.
If you have a big AGP aperture to play with there is a faster way. When you get the call to copy the texture from user space, don't copy it. Instead mark it's page table entries as copy on write. Get the physical address of the page and set it into the GART. Now the GPU can get to it with zero copies. When you are done with it, check and see if the app caused a copy on write, if so free the page, else just remove the COW flag. -- Jon Smirl [EMAIL PROTECTED] ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://ads.osdn.com/?ad_id=6595&alloc_id=14396&op=click -- _______________________________________________ Dri-devel mailing list Dri-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/dri-devel
