FA-10575 / Raster compositing / Member archive
Xor disjoint coverage · case 05
Adding both channels retains their overlap during exclusive compositing.
Case contract
Source and destination are premultiplied channel values with corresponding normalized alphas. Return Porter-Duff XOR channel.
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 | 0.75 | 0.5 | Failed |
MEMBER ARCHIVE
The complete case is available to members.
This record includes three runnable implementations, regression fixtures, execution results, and source hashes.
Member access is invitation-based. Sign in with your invited account to inspect the sources.
Sign in to the archive ↗