[PATCH] exa: only draw valid trapezoids

[Keith Packard]

Julien Cristau <jcristau at debian.org> writes:

> Does the underflow affect users of xTrapezoidValid other than exa?  Also
> should we check for valid traps up-front and send an error back instead
> of dropping the rendering?

I'm not sure there are any "invalid" trapezoids, only those which
shouldn't generate any output.

-- 
keith.packard at intel.com
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