FA-52460 / Raster memory layout / Member archive

Sample Planar Multisample: Multisample layer origin uses sample pitch or double counts samples · case 05

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

Member previewVariant 5 · 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": 1156, "allocation_end": 11716, "coverage_address": 1025, "footer_address": 4420, "image_pixels": 80, "layer_origin": 540, "layer_pitch": 3887, "pixel_index": 21, "sample_origin": 1030, "sample_pitch": 485}`	`{"address": 4558, "allocation_end": 11716, "coverage_address": 4427, "footer_address": 7822, "image_pixels": 80, "layer_origin": 3942, "layer_pitch": 3887, "pixel_index": 21, "sample_origin": 4432, "sample_pitch": 485}`	Failed

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