FA-51298 / Raster clipping / Member archive

Stroke component clip union: closed end adjacency · case 03

A closed path emits an end cap and omits its closing join.

Member previewVariant 3 · 3 implementations · 14 checks per implementation

Case contract

Segments carry precomputed body, start-cap, end-cap and following-join sample sets plus an active flag. Active adjacent segments share a join and suppress interior caps. Inactive segments create dash gaps; each active component receives caps at its gap endpoints. A closed path connects the last and first segments. Empty bodies may still have cap coverage. Clip the complete union to the requested mask and target.

Why this case matters

Raster clip state can leak coverage across draws even when every individual region is valid.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
explicit sequence 3	`[[0, 1, 3]]`	`[[0, 1]]`	Failed

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