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simandClaude Opus 5.5
7de6947bef
The third of the performance tools proposed in #564. Every performance PR claims Home looks the same; this checks it, and makes the screenshots safe to post: - Compares the two screenshots, leaving out the regions given with --mask (the clock moves on), and reports how many pixels differ by more than --threshold (default 8, compression noise) and where. Exit status 0 identical, 1 different, 2 an error, so a script can rely on it. - Writes the pair side by side with --blur regions pixelated in both (the Wi-Fi name), and with --diff the differing pixels themselves. - Boxes are checked before anything is read; one outside the picture, or screenshots of different sizes, are errors rather than a silent partial compare. - tools/screendiff.md says how to find the boxes on your own layout with uiautomator, and what makes the comparison mean something. Pillow was already added to tools/requirements-perf.txt for flamechart.py; nothing new to install. The image tests skip without Pillow, so CI stays as it is. Co-Authored-By: Claude Opus 5.5 <[email protected]>