FA-51918 / Raster memory layout / Member archive

Nested Macrotiles: Microtile y retains the macrotile component · case 03

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

Member previewVariant 3 · 3 implementations · 6 checks per implementation

Case contract

An 8x8 macrotile contains four 4x4 microtiles in column-major order; texels within each microtile are row-major. Macrotiles are row-major and each macrotile has a configurable trailer. 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 5	`{"address": 1471, "local_texel": 0, "macro_columns": 3, "macro_id": 5, "macro_pitch": 262, "macro_x": 2, "macro_y": 1, "micro_id": 2, "micro_x": 0, "micro_y": 2}`	`{"address": 1343, "local_texel": 0, "macro_columns": 3, "macro_id": 5, "macro_pitch": 262, "macro_x": 2, "macro_y": 1, "micro_id": 0, "micro_x": 0, "micro_y": 0}`	Failed

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This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

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