[PATCH xserver 5/7] glx: Don't flush an arbitrary GL context from DrawableGone

[Eric Anholt]

Adam Jackson <ajax at redhat.com> writes:

> The current context at this point could be anything; we've done nothing
> to bind the context whose drawable is about to go away. There's not
> really much point in doing the flush anyway since any rendering is going
> to be thrown away, so just do nothing.
>
> Signed-off-by: Adam Jackson <ajax at redhat.com>

This reverts 5c606c0a89e74fa223a99864be11cc3be60a159b.  The commit seems
quite wrong, as you've pointed out, though.  I suspect that what that
commit should have done instead was catch a GLXBadCurrentWindow from
DoMakeCurrent's __glXForceCurrent() and just skip the glFlush() when it
happens.

We might want to slip in a better fix before this revert, and make the
revert explicit.  I'm OK with just reverting without the fix, though.
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