Geoffrey Broadwell wrote: > > I'm trying to get Perl's OpenGL support working on my systems, which do > not currently have hardware acceleration support under Mesa. However, > Perl's OpenGL support requires an RGBA visual, but for some reason the > visuals available under software Mesa (the one builtin to XFree 4.1) are > all RGB-only for me. > Anyone have any clue what's going on? As far as I can interpret the tea > leaves, it looks like I'm really running with 32-bit pixels, so I don't > see a problem there . . . . I'm not suprised that software OpenGL doesn't support RGBA - my experience is that most of the effort goes into hardware OpenGL. I'm not sure whether it could be added easily; it may be that the drivers don't honour those bits, since they could be used for something else, such as an overlay. This *might* mean that the server has to tell Mesa about two different sorts of depth24/fbbpp32 visual. I am suprised that Perl's OpenGL requires RGBA; when I was using OpenGL heavily the A channel was an optional extra, even on many graphics workstations. -- Dr. Andrew C. Aitchison Computer Officer, DPMMS, Cambridge A.C.Aitchison@dpmms.cam.ac.uk http://www.dpmms.cam.ac.uk/~werdna
