FA-53302 / Raster memory layout / Member archive

Four Tap Sensor Storage: Readout tap ID swaps quadrant axes or assigns center boundary to wrong tap · case 02

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

Member previewVariant 2 · 3 implementations · 6 checks per implementation

Case contract

A stipulated even-sized sensor splits the image into four quadrants. Each readout tap scans toward the center: right taps reverse x, bottom taps reverse y. Tap packets have three-byte headers and are stored in order [2,0,3,1]. 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": 152, "allocation_end": 326, "half_height": 5, "half_width": 5, "local_x": 5, "local_y": 8, "packet_origin": 14, "packet_pitch": 78, "storage_slot": 0, "tap": 2}`	`{"address": 278, "allocation_end": 326, "half_height": 5, "half_width": 5, "local_x": 4, "local_y": 1, "packet_origin": 248, "packet_pitch": 78, "storage_slot": 3, "tap": 1}`	Failed

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