FA-10578 / Raster compositing / Member archive
Plus blend clamps channel · case 03
Additive blend writes values above the normalized render-target maximum.
Case contract
Return saturated additive blending for normalized nonnegative channel inputs.
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 | 1.25 | 1 | Failed |
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