Re: GL_ARB_texture_env_crossbar for r200

2005-07-22 Thread Patrick McFarland
On Friday 22 July 2005 08:20 am, Roland Scheidegger wrote: > Roland Scheidegger wrote: > > but you can have 6 reads per stage (thanks to different alpha/rgb > > sources), e.g. the whole register set. > > Ah scratch that, wrote too fast. This if of course not an issue, since > you can address the al

Re: GL_ARB_texture_env_crossbar for r200

2005-07-22 Thread Roland Scheidegger
Roland Scheidegger wrote: but you can have 6 reads per stage (thanks to different alpha/rgb sources), e.g. the whole register set. Ah scratch that, wrote too fast. This if of course not an issue, since you can address the alpha and rgb regs separately too. I just didn't do it due to the added c

Re: GL_ARB_texture_env_crossbar for r200

2005-07-22 Thread Roland Scheidegger
Ian Romanick wrote: I'm actually wondering how ATI solved that problem in their driver, I couldn't see an easy way out to avoid the fallback - even using the 2 additional tex env stages or the second phase of the fragment pipeline isn't going to fix the issue I think. Maybe someone else has a g

Re: GL_ARB_texture_env_crossbar for r200

2005-07-21 Thread Ian Romanick
-BEGIN PGP SIGNED MESSAGE- Hash: SHA1 Roland Scheidegger wrote: > I'm actually wondering how ATI solved that problem in their driver, I > couldn't see an easy way out to avoid the fallback - even using the 2 > additional tex env stages or the second phase of the fragment pipeline > isn't

Re: GL_ARB_texture_env_crossbar for r200

2005-07-19 Thread Philipp Klaus Krause
Roland Scheidegger schrieb: > Here's a somewhat experimental patch to enable > GL_ARB_texture_env_crossbar on r200. It got more ugly than I wanted... > Works with tests/crossbar, glean(texcombine), couldn't find anything > more which uses it (well ut2k4 seems to, but I couldn't see any > difference

GL_ARB_texture_env_crossbar for r200

2005-07-19 Thread Roland Scheidegger
Here's a somewhat experimental patch to enable GL_ARB_texture_env_crossbar on r200. It got more ugly than I wanted... Works with tests/crossbar, glean(texcombine), couldn't find anything more which uses it (well ut2k4 seems to, but I couldn't see any difference). There is some overhead associated