[Xquartz-dev] 2.3.3_rc1

[Jack Howarth]

I would also add that while vmd-xplor is currently a legacy
ppc program running under Rosetta (on Intel), it works fine
under PPC as direct rendering. So unless the program is
tickling bugs in Rosetta, we are likely exposing into bugs
in the video drivers on Intel.
                  Jack

On Mon, Mar 09, 2009 at 11:50:42PM -0400, Jack Howarth wrote:
> The author of vmd-xplor added...
> 
>         if [ `/usr/bin/uname -m` = "i386" ]; then
>                 # I get too many complaints when these are not set.
>                 #
>                 VMDSIMPLEGRAPHICS=1
>                 LIBGL_ALWAYS_INDIRECT=1
>                 export VMDSIMPLEGRAPHICS LIBGL_ALWAYS_INDIRECT
>         fi
> 
> to the vmd-xplor startup script. I guess the alternative is to
> take a look at those cases where vmd-xplor has issues (like
> on a HD2600 with 2.3.3-rc1) and fix them in libGL.
>               Jack
> 
> On Mon, Mar 09, 2009 at 08:39:24PM -0700, Jeremy Huddleston wrote:
> > We don't intend to support indirect rendering with the new libGL in the 
> > short term.  It's really too slow and only useful when the X client is on 
> > a remote system (which is rarely the case for OSX apps).  Are you running 
> > vmd-xplor on a remote system for some reason?  If that were the case, 
> > then I'd expect glxinfo to actually bail with an AppleDRI error.
> >
> > --Jeremy
> >
> > On Mar 9, 2009, at 17:13, Jack Howarth wrote:
> >
> >> George,
> >>   I believe I have figured out the origin of the problems
> >> with vmd-xplor on 2.3.3-rc1. The problem is that the new
> >> GLX/DRI code doesn't honor LIBGL_ALWAYS_INDIRECT when it
> >> is set. Under X11 2.3.2.1, I get...
> >>
> >> [Macintosh-2:~] howarth% setenv LIBGL_ALWAYS_INDIRECT 1
> >> [Macintosh-2:~] howarth% glxinfo | grep direct
> >> direct rendering: No (LIBGL_ALWAYS_INDIRECT set)
> >>
> >> whereas under 2.3.3-rc1, I get...
> >>
> >> [Macintosh-2:~] howarth% setenv LIBGL_ALWAYS_INDIRECT 1
> >> [Macintosh-2:~] howarth% glxinfo | grep direct
> >> Xlib:  extension "Generic Event Extension" missing on display "/tmp/ 
> >> launch-W4Xpc5/:0".
> >> Xlib:  extension "Generic Event Extension" missing on display "/tmp/ 
> >> launch-W4Xpc5/:0".
> >> direct rendering: Yes
> >>
> >> If you can fix this in the GLX, I can test it to see if this
> >> eliminates the issues with vmd-xplor on the HD2600.
> >>                 Jack
> >> _______________________________________________
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