FA-10639 / Color encoding / Member archive
Color key before opacity · case 04
Color-key transparency is ignored during RGBA conversion.
Case contract
For straight RGB bytes, matching all three color-key channels sets alpha to zero; other pixels retain supplied alpha.
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 | [1, 2, 3, 255] | [1, 2, 3, 0] | Failed |
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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.
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