FA-10604 / Color encoding / Member archive
Unpack rgba byte mask · case 04
Shifted higher-order channels leak into lower byte values.
Case contract
Unpack a 32-bit unsigned big-endian RGBA integer into four bytes, masking each shifted field.
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, 258, 66051, 16909060] | [1, 2, 3, 4] | Failed |
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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.
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