FA-50804 / Raster clipping / Member archive

Run length clip stream: repeat current mode · case 04

Repeat uses the current mode instead of the mode captured with the repeated run.

Member previewVariant 4 · 3 implementations · 13 checks per implementation

Case contract

A scanline clip stream carries signed cursor moves, covered and uncovered runs, an explicit covered/uncovered mode and row reset. Only covered samples in the finite target are emitted. Repeat reruns the previous run with its original mode. Draw observes unique sorted coverage; clear removes coverage without resetting cursor or mode.

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 4	`[[0]]`	`[[0, 1, 2]]`	Failed

MEMBER ARCHIVE

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