[cairo] infinite loop when CAIRO_FIXED_FRAC_BITS is 8

Carl Worth cworth at cworth.org
Thu Feb 14 12:34:31 PST 2008

On Wed, 13 Feb 2008 20:20:50 -0800, Carl Worth wrote:
> Anyway, I think I'll have a fix soon.

Here's what I've got. This fixes the infinite loop, adds a spline to
the degenerate-pen test case, (which was triggering the infinite loop
before the fix here), and then switches from 16.16 to 24.8 fixed-point

I'd appreciate any review of the change I made to
_cairo_slope_compare. This is a fairly core part of cairo's
computational geometric machinery so it's important to get the details


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