On Mon, 2007-05-14 at 03:21 -0400, Dan Torop wrote: > > When using blending for transparency, banding occurs in the output > and colors have a greenish cast.
Does this also happen when rendering say a GL_QUAD instead of using glBitmap? > version indirect rendering r200 DRI on > ---------------- ------------------ ------------ > Debian 6.5.1-0.6 banding 50% gray > Debian 6.5.2-4 banding banding > Debian 6.5.3~rc3-1 banding banding > released 6.5.2 (DRI) banding 50% gray > released 6.5.3 (DRI) banding 50% gray > released 6.5.3 (xlib) 50% gray n/a > > Unless I'm totally making a hash of diagnosing this, it seems that: > > - Somehow the Debian-compiled versions of Mesa exhibit a bug which > vanilla version of Mesa does not exhibit?? As indirect rendering seems to fail consistently (the xlib backend works completely differently), did you double-check that these cases were really using direct rendering? > - There is an inconsistency between indirect and direct rendering (at > least for the R200) in Mesa. I can't speak to cards besides the > R200. Note that when AIGLX is enabled (check Xorg.0.log), the Mesa *_dri.so driver will be used in both cases, though in contrast to direct rendering the X server will only load it once on X startup. > I'm reporting this against libgl1-mesa-dri, though perhaps it could > as easily be against libgl1-mesa-glx or the mesa source package? Or xserver-xorg-core... > Please excuse me if I am utterly flubbing the testing of this and it > isn't a real bug. I'd be very excited if it were reproducible on > another computer... Can't reproduce it with the r300 driver from more or less up to date Mesa GIT here even with indirect rendering. > or if it turned out to not be reproducible and was a result of a silly error > here. Can't see any obvious errors FWIW. -- Earthling Michel Dänzer | http://tungstengraphics.com Libre software enthusiast | Debian, X and DRI developer
