--- Felix Kühling <[EMAIL PROTECTED]> wrote: > On Tue, 23 Mar 2004 08:16:49 -0800 (PST) > Alex Deucher <[EMAIL PROTECTED]> wrote: > > > > > --- Felix K_hling <[EMAIL PROTECTED]> wrote: > [snip] > > > Anyway, the reason is that accelerated 3D rendering only works > with > > > tiled memory but the front buffer is linear. > > > > > > Software fallbacks draw to tiled surfaces, which map linear or > tiled > > > memory. If I understand it correctly it shouldn't make any > difference > > > whether the underlying memory is linear or tiled (as long as the > > > tiled > > > surface registers are setup correctly). > > > > That's my understanding as well, but I could be wrong. Also, > tiling > > the front buffer results in lower performance. I'm not sure why. > It > > might have just been due to the way the code was initially > architected. > > your changes to the 3d driver may have fixed that. > > Don't know which changes that would be. The only thing where the > tiling > of the front buffer would make a difference for normal double > buffered > rendering is on buffer swaps. The swapping didn't change. So possibly > blitting to a linear frame buffer is faster than blitting to a tiled > one. Anyway, from Keith's comments about double-buffered visuals > where > the app switches between rendering to front and back buffer, it > sounds > like we really want to have a tiled front buffer. >
I fixed tiled mode today. I'll be checking in a fix tomorrow. I need to clean up my tree, isolate the changes, and make sure I didn't break savage4. Alex __________________________________ Do you Yahoo!? Yahoo! Finance Tax Center - File online. File on time. http://taxes.yahoo.com/filing.html ------------------------------------------------------- This SF.Net email is sponsored by: IBM Linux Tutorials Free Linux tutorial presented by Daniel Robbins, President and CEO of GenToo technologies. Learn everything from fundamentals to system administration.http://ads.osdn.com/?ad_id=1470&alloc_id=3638&op=click -- _______________________________________________ Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
