FA-51089 / Raster clipping / Member archive

Clip occlusion query: duplicate samples · case 04

Duplicate IDs in one coverage draw are counted as independent raster samples.

Member previewVariant 4 · 3 implementations · 12 checks per implementation

Case contract

Queries count distinct covered sample IDs per draw after path clipping and sample enable masking. Multiple draws accumulate independently, while duplicate sample IDs within one draw count once. Begin resets a named result and activates it; end makes it readable. Result reads while active return null. Conditional draws consult only completed query counts. Disabling queries pauses accumulation without disabling clipping.

Why this case matters

Raster clip state can leak coverage across draws even when every individual region is valid.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
explicit sequence 2	`[3]`	`[2]`	Failed

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