On Mon, 28 Feb 2005 19:46:07 +0100, Roland Scheidegger <[EMAIL PROTECTED]> wrote: > Vladimir Dergachev wrote: > >>> > >>> By default r300_demo and r300_driver have tiling enabled at 16x16 pixel > >>> squares, in fact the card should come up with this on by default.. > >>> > >>> Now on to the next question - how can one fix the 2048x2048 limit ? > >>> > >> > >> check out this thread: > >> http://marc.theaimsgroup.com/?t=106703195300003&r=1&w=2 > >> another option would be to adjust the 3d engine offset: > >> http://marc.theaimsgroup.com/?t=110690272200007&r=1&w=2 > >> however, as I said in another email yesterday, the max width of a > >> tiled surface is 2048. > > > > > > This was enlightening, thank you ! > > > > I think that with R300 we could do this: > > > > * modify vertex program to perform an arbitrary translation as the last > > step. > > > > * use separate buffer offsets for each 2048x2048 square. > > > > Issues: > > > > * need to check that we have enough of zbuffer/doublebuffer allocated > > to accomodate this.. > > > > What does everyone think ? > > Wasn't the limit 2560x2560 with the r300 based chips? That's at least > what fglrx will do on r300. I'm wondering about that though a bit, that > would be 11.3 bit for coords or so ;-). It would also mean the tiling > regs need to be different a bit on r300 compared to r100/r200.
yeah I had heard that too. it seems like they probably would have just gone to 12 bits. However, perhaps there are other issues over 2560 or they just say that because 1280x1024x2 is a common set up. I hope to get a r3xx or r4xx based card soon, at which point I plan to dig into the tiling. Alex > > Roland > ------------------------------------------------------- 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
