FA-10587 / Raster compositing / Member archive
Overlay branches on backdrop · case 02
Overlay uses source brightness to choose its branch, yielding hard-light instead.
Case contract
Return overlay blending for normalized straight channels; the backdrop destination chooses the dark or light branch.
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 | 0.625 | 0.375 | Failed |
MEMBER ARCHIVE
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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.
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