FA-52125 / Raster memory layout / Member archive

Mip Major Array: Mip-major storage is interpreted as layer-major · case 05

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

Member previewVariant 5 · 3 implementations · 6 checks per implementation

Case contract

Four ceil-halved mip levels each contain all array layers. Each layer owns a one-byte tag and tightly packed texels; level records add a five-byte header. Return the allocation directory and selected layer origin. 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	`{"allocation_end": 1195, "dims": [[11, 4], [6, 2], [3, 1], [2, 1]], "layer_origin": 778, "layer_pitches": [265, 73, 19, 13], "level_offsets": [0, 800, 1024, 1086], "level_spans": [800, 224, 62, 44], "payload_origin": 779, "selected_header": 700, "selected_pitch": 73, "texel_counts": [44, 12, 3, 2]}`	`{"allocation_end": 1195, "dims": [[11, 4], [6, 2], [3, 1], [2, 1]], "layer_origin": 943, "layer_pitches": [265, 73, 19, 13], "level_offsets": [0, 800, 1024, 1086], "level_spans": [800, 224, 62, 44], "payload_origin": 944, "selected_header": 865, "selected_pitch": 73, "texel_counts": [44, 12, 3, 2]}`	Failed

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