> And never mind that you can't make a conformant OpenGL driver with
> Gallium due to the impossibility of software fallbacks.

Well, you could use the failover module to use softpipe for fallbacks,
but no one does, for the following reasons:
1. Modern hardware doesn't need any software fallbacks, and at most
you need to "emulate" things with ad-hoc shaders (possibly compute
shaders)
2. Software fallbacks are mostly useless because a terribly slow
implementation is not significantly more useful than a broken uone
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