Re: [Bisected] Bugs in cairo's "contour" stroking

Carl Worth <[email protected]> writes:
> A cairo user recently reported to me that cairo is not robust when
> stroking wide splines with tight curvature, (and showed me a rather
> striking example).

In my previous report, it might have appeared that the bug only showed
up in obscure cases with huge line widths and near-degenerate path
shapes.

But this same bug is quite evident in much more common cases with small
line widths, (but with high values of instantaneous curvature).

See this glaring example:

	http://cworth.org/~cworth/tmp/spline-bug-cairo-master.png

Clearly, cairo is not being accurate within its default 0.1 pixel
tolerance in a case like that. This is not at all acceptable.

-Carl

PS. Here are the spline coordinates used to render the above example:

{ { 571.25, 247.185 }, { 78.225, 224.06 }, { 129.5, 312.5 }, { 210.5, 224.5 } }

-- 
cairo mailing list
[email protected]
http://lists.cairographics.org/mailman/listinfo/cairo

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.12 (GNU/Linux)

iEYEARECAAYFAk/mCSkACgkQ6JDdNq8qSWj3PwCgk0Z7wfqnu2yvpQ3c9bakhi2c
130AnR+pHA2YHaJKwyCfWP6hWIVmIbtD
=Gb0S
-----END PGP SIGNATURE-----