[Mesa-dev] [Bug 61012] alloc_layout_array tx * ty assertion failure when making pbuffer current

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Mon Feb 18 11:12:29 PST 2013


--- Comment #6 from Brian Paul <brianp at vmware.com> ---
(In reply to comment #5)
> Created attachment 75068 [details] [review]
> another attempt to fix pbuffer initialization
> Hmm is it legal to use XGetGeometry() with pbuffers?

Not normally, but in the glx/xlib code we create a dummy pixmap for each
pbuffer so that we have an XID that we can pass around.

> I think something like this patch would be better.

That would be fine too.  It's what I first tried.

> Not sure if guarding against zero-sized buffers in drivers is needed. Might
> be but there are other instances where we hack up such windows to have
> width/height of 1 for that reason so we don't have to do it in drivers.

I hacked up a test for a 0x0 surface.  Softpipe worked but the llvmpipe
assertion failed.  I guess I'd consider the llvmpipe change to be a defensive
coding check.  One less way for llvmpipe to fail is good thing.

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