FA-52468 / Raster memory layout / Member archive

Sample Planar Multisample: Sample-plane pixel index transposes or retains interleaved sample factor · case 03

The returned physical layout descriptor disagrees with the declared buffer mapping at pixel_index.

Member previewVariant 3 · 3 implementations · 6 checks per implementation

Case contract

A toy multisample target stores one full image per sample within each layer. Each sample image starts with a five-byte coverage header; layer footer length is seven bytes. Samples are never resolved or averaged. Return the named intermediate layout descriptor and final address fields; all quantities are integer byte offsets unless explicitly stated.

Why this case matters

Offline raster resource, upload, readback, and storage-layout regression model.

One recorded failure

Sample boundary fixture

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

Boundary fixture	Actual	Expected	Outcome
layout fixture 2	`{"address": 1456, "allocation_end": 3600, "coverage_address": 1419, "footer_address": 2404, "image_pixels": 48, "layer_origin": 1222, "layer_pitch": 1189, "pixel_index": 8, "sample_origin": 1424, "sample_pitch": 197}`	`{"address": 1492, "allocation_end": 3600, "coverage_address": 1419, "footer_address": 2404, "image_pixels": 48, "layer_origin": 1222, "layer_pitch": 1189, "pixel_index": 17, "sample_origin": 1424, "sample_pitch": 197}`	Failed

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