On 2002.04.03 14:43 Sergey V. Udaltsov wrote: > After all these interesting and informative discussions, everyone has > forgotten the start of the thread:) Basically, there should one answer > to the question whether and how "blending+fog" can be implemented .
> Possible variants: > 1. Yes, it can be done with hardware acceleration. DRI team knows how. > 2. No, it cannot be done. DRI team knows why. > 3. Possibly yes but actually no. ATI knows but DRI will never know (NDA > issues) > 4. Possibly yes but now DRI team does not know exactly how... He!He!.. you missed!! It's a mix of variant 1 and 2..! :) > Which answer is the correct one? After this question is answered, we > (users/testers) could get the idea whether we'll finally have HW > implementation or DRI will use indirect rendering here. As Leif previously said is his reply, it can be done in hardware by messing the colors of the vertex to incorporate the fog (as software Mesa used to do in 3.x) but it's non-conformant to the OpenGL spec. So the solution found is to do it either like this or by software depending of the value of a environment var. As you can guess implementing this is not a high priority. > Actually, here is the point where CPU power does not really matter. What > really matters is "possible"/"impossible" and "know"/"don't know" (sure, > add "want/don't want":) > Well, CPU power does matter if the user is inclined to choose the conformant way and do software fallback. The fact that the mach64 driver needs several software fallbacks to be really OpenGL conformant is one of the reasons for my interest in improving the Mesa sw rendering. (Which I must correct you, was the _real_ start of the thread :) > BTW, just tested mach64 driver with 3ddesktop. _Really_ fast but there > is a lot of artefacts and incorrect rendering. Probably, it's buggy app > (version 0.1.2:) but not necessarily. Could anyone please try and > comment an experience? > > Cheers, > > Sergey > Regards, José Fonseca _______________________________________________ Dri-devel mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/dri-devel
