On Thursday 17 March 2005 23:53, [EMAIL PROTECTED] wrote: > > > The UseNix paper on the experimental Kdrive server goes into some depth on > > > > a > > > design of copying the Pixmaps from System Memory to Graphics Memory and > > back. It > > > also discusses the XOrg/XFree approach: > > > http://www.usenix.org/events/usenix04/tech/freenix/anholt.html > > > > Apparently, one has to be a USENIX member to view this paper. > > Opps I gave the wrong link. The paper can be downloaded directly from: > http://www.anholt.net/papers/kdrive-2004/kdrive-v6.pdf
Thanks. It seems that for Render acceleration they tried something like the move-in-move-out scheme for software fallbacks that I suggested in an earlier mail and found that it was in fact bad for performance. So we will have to deal with mmap()ing video memory in normal userspace programs. > > > Interesting the White Paper on the design of the SGI Xserver/OpenGL > > interface > > > also briefly discusses the 2D acceleration by the Xserver in section 5.3. > > > Apparently not much is done. It could have changed by now. > > > http://citeseer.ist.psu.edu/kilgard95system.html > > > > ... and this server appears to be down or extremely slow :/ > > I have managed to download a copy. I can email you a copy if you like. Seems like the server problems were only temporary, I managed to download a copy after all. cu, Nicolai
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