[PATCH 4/5] glx: Implement GLX_PRESERVED_CONTENTS drawable attribute

[Eric Anholt]

Adam Jackson <ajax at redhat.com> writes:

> We back pixmaps with pbuffers so they're never actually clobbered, so
> we're really just recording the value passed in at create time so that
> you get the same thing when you query.

I guess I'm not clear on this one why we wouldn't just always say that
we always have a preserved buffer -- we always behave that way, right?

Patches 1, 2, 3, and 5 are:

Reviewed-by: Eric Anholt <eric at anholt.net>
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