This is used in libGL to determine a preferred visual. glxinfo -v will also
report "visualCaveat=Slow" for such visuals.
(cherry picked from commit d5c17f585a)
This gives us a *lot* more visuals, and they should be more accurate.
Some of the visuals may have been wrong before. This may enable more
OpenGL programs to behave correctly.
I also suspect libGL needs a little work to handle some of these correctly.
(cherry picked from commit 98a084ce9c)
We need to revisit the GL/indirect.c changes. I think indirect.c should
be using the same feature detection and GLX visual config code. The
indirect changes will require testing...
(cherry picked from commit 49b7a7c6f2)
Use ErrorF for an error message after an xcalloc failure, and return instead of falling through to GlxSetVisualConfigs, or abort()ing at the test branch.
(cherry picked from commit 1056700971)
