KenM76andClaude Opus 5.5 a7b07bfc56 fix(render): a stroke whose outline comes back with NaN is drawn, not dropped (#4907) ...

kurbo 0.13.1's stroker can give a cubic that is nearly a line (all control points within a
rounding error of its chord) a NaN join, and vello_common's `flatten::fill` drops any path
containing NaN, so the whole outline vanished. An Illustrator outline ending in
`73.763 -0.536 l 73.764 -0.536 73.764 -0.536 73.764 -0.536 c` did (#4907). kurbo tracks the
bug class in linebender/kurbo#617 and #519; #610 is unreleased.

Vendored vello_common patch (2): when the expanded stroke is not finite, `flatten::stroke`
strokes the path again with every quadratic or cubic whose control points lie within the
tolerance of its chord replaced by a line, one element out per element in. A finite outline
is unchanged, and a path with non-finite input is still dropped. `stroke` and
`StripGenerator::generate_stroked_path` take a `Clone` path; vello_cpu's callers pass
`&BezPath` and a copied slice iterator.

Tests: `flatten::tests::a_tiny_degenerate_cubic_does_not_drop_the_stroke` and the render
crate's `stroke_degenerate_cubic` pixel test fail with the fallback disabled;
`a_finite_outline_is_stroked_as_before` and `a_path_with_nan_is_still_dropped` are guards.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01SqmHYx8FiWM5PcsoiErgp9

2026-10-27 00:34:47 -04:00

..

examples

chore: resolve SonarCloud maintainability issues (#4356)

2026-10-23 23:28:18 -04:00

src

style: cargo fmt on moved files

2026-10-27 00:34:32 +00:00

tests/it

fix(render): a stroke whose outline comes back with NaN is drawn, not dropped (#4907)

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Cargo.toml

Reading colours: replace document colours for reading comfort (#897) (#1270)

2026-10-12 02:49:31 -04:00