[Mesa-dev] [Bug 38312] Swrast doesn't really know whether a Framebuffer object is bound

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=38312

--- Comment #26 from Benoit Jacob <bjacob at mozilla.com> 2011-06-15 08:52:59 PDT ---
(In reply to comment #24)
> Sorry, I was ambiguous. It's the GL driver's responsibility to defer the
> destruction internally. See:
> 
>   http://www.opengl.org/sdk/docs/man/xhtml/glXDestroyContext.xml
> 
> I couldn't find a piglit test for this yet.
> 
> That said, it's probably easy to work around this on firefox, until Mesa
> handles this correctly.  Assuming this is indeed the problem.

Oh, that's even more interesting to me. Our code was:

        glXDestroyContext(mDisplay, mContext);
        glXDestroyPixmap(mDisplay, mDrawable);

We had X errors from MakeCurrent() on closedown suggesting that the X drawable
had been destroyed too early. Now it seems that it could just be that since the
context was still current, its destruction was postponed, so by the time it
actually happened, the drawable has already been destroyed. If that's the case,
my latest build should not crash on closedown.

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