FA-10584 / Raster compositing / Member archive
Screen blend complement product · case 04
Multiplication computes a darkening blend rather than screen.
Case contract
Return screen blending for two normalized straight color channels.
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 fixtureThis sample comes from the broken implementation of a controlled reproducer.
| Boundary fixture | Actual | Expected | Outcome |
|---|---|---|---|
| fixture 1 | 0.25 | 0.75 | Failed |
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