FA-10654 / Raster clipping / Member archive

Scissor intersection empty · case 04

Combining scissor bounds as a union enlarges the drawable region.

Member previewVariant 4 · 3 implementations · 4 checks per implementation

Case contract

Intersect two valid integer half-open scissor rectangles [left,top,right,bottom]. Clamp negative overlap width/height to zero at the maximum start coordinate.

Why this case matters

A deterministic software graphics stage with explicit channel and coordinate conventions; no hardware, device profile or API behavior is inferred.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
fixture 1	`[0, 0, 6, 4]`	`[2, 1, 4, 3]`	Failed

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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

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