-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Tom Flynn wrote:
I'm CC'ing mesa3d-dev because that's where most of the 3D specific work is discussed. > I have couple quick questions about Unichrome Pro. A couple months ago, I > was trying out a Unichrome Pro based machine. I'm not sure if things have > changed since then, but there was two major things that turned me off of > it.... > > 1) max texture size was 512. is this a limitation of the chip or of the > driver? if this is a limitation of the driver, what needs to be done to fix > it? Most likely a limitation of the amount of available texture memory. The 3D driver will only report texture sizes that it can be sure will fit in texture memory. If it can't fit a 1024x1024x24-bit texture for each texture unit (2 on Unichrome), it will only advertise 512x512. > 2) texture download performance was pretty bad. looking in via_tex.c, it > looks as if it does a memcpy to update the texture. the via_sse_memcpy was a > little faster, but still not nearly fast enough. is there a faster way? > (dma?) Or is there some limitation due to how the driver is written? I > noticed the open-source radeon driver was just as slow. The closed source > ati drivers were several orders of magnitude faster. Keith Whitwell did some work in that area not too long ago. You might want to touch bases with him. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.6 (GNU/Linux) iD8DBQFDeR0KX1gOwKyEAw8RAuASAJ92goTdy6bRTxbFhQxf9K7S6kezwgCdEM5o 04jr6H/5iP8xzIaBjyGCKKo= =FcAW -----END PGP SIGNATURE----- ------------------------------------------------------- This SF.Net email is sponsored by the JBoss Inc. Get Certified Today Register for a JBoss Training Course. Free Certification Exam for All Training Attendees Through End of 2005. For more info visit: http://ads.osdn.com/?ad_id=7628&alloc_id=16845&op=click _______________________________________________ Mesa3d-dev mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/mesa3d-dev
