FA-53314 / Raster memory layout / Member archive

Four Tap Sensor Storage: Bottom readout tap is not reversed or reversal applied to top taps · case 04

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

Member previewVariant 4 · 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 3	`{"address": 36, "allocation_end": 880, "half_height": 6, "half_width": 7, "local_x": 1, "local_y": 0, "packet_origin": 28, "packet_pitch": 213, "storage_slot": 0, "tap": 2}`	`{"address": 211, "allocation_end": 880, "half_height": 6, "half_width": 7, "local_x": 1, "local_y": 5, "packet_origin": 28, "packet_pitch": 213, "storage_slot": 0, "tap": 2}`	Failed

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

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