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feat(diff): accept JPEG inputs for screenshot comparison - #2718
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Both diff screenshot inputs had to be PNG, so a capture from another tool had to be converted first and a HarmonyOS artifact, which the platform serves as JPEG, never compared. Each input is now decoded from its own bytes. png-transcode.ts became screenshot-image.ts, the one owner of container sniffing for both the decode and the provider transcode path, and the PNG worker gained a decode-image job that answers pixels instead of PNG bytes.
Drops the screenshot-diff module mock and the package export that existed only to feed it, so the JPEG cases run the same worker client production uses; pins the diff artifact container and the decode-image transfer arm, and corrects two doc claims the first commit overreached on: HarmonyOS still serves JPEG, and a stored JPEG compares exactly against itself at threshold 0.
The gate rewrites those timing and result artifacts on every run; they were swept in by a broad stage, not changed by this feature.
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Reviewed at 8d3a871. This looks ready to merge. CI is green across all 20 checks, and I didn't find anything that blocks it. I traced the JPEG decode and re-encode paths manually rather than running the suite, relying on CI green plus reading the code against the test assertions. Not blocking: |
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…missions * origin/main: feat(diff): accept JPEG inputs for screenshot comparison (callstack#2718) refactor(system-button): declare home, app-switcher and action-button as one button family (callstack#2715) # Conflicts: # CHANGELOG.md
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Summary
diff screenshotdecoded both inputs as PNG, so a capture exported by another tool had to be converted first and a HarmonyOS artifact — which the device serves as JPEG under whatever name the command was given — could never be compared. Each input is now decoded from its own bytes: the container is sniffed, so a.pngname holding JPEG decodes as JPEG.png-transcode.tsbecamescreenshot-image.ts, the one owner of container sniffing for both the decode path and the provider transcode path, and the PNG worker gained adecode-imagejob that answers pixels instead of PNG bytes, so a full-resolution decode never blocks the daemon event loop. The--outdiff image stays PNG, as do the crop, overlay, and resize passes that rewrite a screenshot in place.13 files, ~80 net production lines. No new flag, no schema or wire change.
Validation
pnpm check:affected --runpassed (all runnable checks) at46b0079daf, afterpnpm check:quick.8d3a8719a9only restores gate-generated.agent-device/test-artifactsfiles to theirorigin/maincontent; no source changed.New coverage: worker↔sync decode parity for both containers,
decode-imagetransfer ownership, a JPEG stored under a.pngname comparing exactly at--threshold 0, decoded dimensions on a JPEG, corrupt-JPEG and neither-container refusals with their typed details, and the diff artifact pinned to a PNG signature. The screenshot-diff suite now runs the shipped worker client instead of a module mock.Unresolved risks, both pre-existing and deliberately not folded in here:
packages/platform-harmonyos/src/screenshot.ts:15still writes JPEG bytes into a.pngartifact, so--scaleand--overlay-refsfail on that platform. The provider-side transcode Limrun got in fix(limrun): write the iOS screenshot as PNG instead of Limrun's JPEG bytes #2645 is the owning fix; this PR makes those artifacts diffable meanwhile.maxImagePixelsis consulted (already true for PNG);jpeg-jsself-caps at 100 MP / 512 MB.