Re: [Plib-users] PLIB games

[Steve B. <sjb...@ai...>]

Steve Wendt wrote:
> 
> On Mon, 23 Jul 2001, Steve Baker wrote:
> 
> > That's almost certainly a long-standing Mesa bug where they don't handle
> > glPushAttrib/glPopAttrib correctly.
> 
> Bummer... this didn't happen with some old version of Mesa; was it
> re-introduced, or did something in PLIB change?

I think it comes and goes in Mesa...in striving for good performance,
the implementation of pushAttrib and popattrib is "tense" code...the
slightest thing seems to break it again.

> Any way to work around it
> for now?  I suppose if it only affects the MESA_FX version, it's not of
> much interest...

Well, certainly less of a priority than if (say) the nVidia drivers were
causing a problem!

The difficulty is that replacing glPushAttrib/glPopAttrib with something
else requires a *TON* of messy glGet* calls to get the current attributes
and a bunch of even more messy GL calls to restore them again.

All those calls will slow things down considerably - on an already slow
system.

If someone wants to contribute that as a patch that only turns on for
systems that are specifically affected, I'd be happy to accept it - but
I'm not going to write it myself.

This problem will affect some applications code as well as PLIB itself.
 
> > But you can have *BOTH*.  You should be able to run (say) a GeForce-2 and
> > the Voodoo together.  If you installed only the GeForce's OpenGL and
> 
> I know... need a whole new machine (no AGP slot).

*Oh*.  :-(

There *are* some PCI-bus GeForce cards out there - but I wouldn't recommend
them.

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