FA-51940 / Raster memory layout / Member archive

Nested Macrotiles: Microtile origin uses pixels as bytes or edge length as area · case 05

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

Member previewVariant 5 · 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 3	`{"address": 511, "local_texel": 8, "macro_columns": 2, "macro_id": 1, "macro_pitch": 392, "macro_x": 1, "macro_y": 0, "micro_id": 1, "micro_x": 0, "micro_y": 1}`	`{"address": 591, "local_texel": 8, "macro_columns": 2, "macro_id": 1, "macro_pitch": 392, "macro_x": 1, "macro_y": 0, "micro_id": 1, "micro_x": 0, "micro_y": 1}`	Failed

MEMBER ARCHIVE

The complete case is available to members.

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

Member access is invitation-based. Sign in with your invited account to inspect the sources.