FA-53019 / Raster memory layout / Member archive

Virtual Texture Gutter Atlas: Interior row uses tile width instead of atlas pitch or transposes axes · case 04

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

Member previewVariant 4 · 3 implementations · 6 checks per implementation

Case contract

A 4x4 virtual tile occupies a 6x6 atlas cell, including one replicated texel on every side. Physical cell IDs come from a remap; atlas width is five cells. Input requests an interior texel, and output includes four border-copy addresses. 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": 244, "bottom_border": 804, "cell": 0, "cell_origin": 44, "cell_xy": [0, 0], "interior_origin": 199, "left_border": 494, "right_border": 519, "row_pitch": 150, "top_border": 54}`	`{"address": 504, "bottom_border": 804, "cell": 0, "cell_origin": 44, "cell_xy": [0, 0], "interior_origin": 199, "left_border": 494, "right_border": 519, "row_pitch": 150, "top_border": 54}`	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.