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The expected vs actual results in this look identical to the eye and
appear to be slight anti-aliasing differences at color boundaries.

Detailed analysis:

There are three unique and identical clusters of images.

Cluster A - the expected rendering which is identical across platforms.
Cluster B - the actual renderings without will-change
Cluster C - the actual renderings with will-change

Cluster B <-> C: Differ by 21 pixels with a max per-channel delta of 1.

Cluster A <-> B and A <-> C: Differ by 0.9% of pixels with a max
per-channel delta of 11.

This CL modifies the image comparison to allow fuzzy matching with these
values.

Bug: 40118302
Change-Id: Iad0449727ea8e4bcc5ff45b3d207fe7aef6ebfcd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6757627
Reviewed-by: Philip Rogers <[email protected]>
Commit-Queue: Sam Fortiner <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1565140}

The expected vs actual results in this look identical to the eye and
appear to be slight anti-aliasing differences at color boundaries.

Detailed analysis:

There are three unique and identical clusters of images.

Cluster A - the expected rendering which is identical across platforms.
Cluster B - the actual renderings without will-change
Cluster C - the actual renderings with will-change

Cluster B <-> C: Differ by 21 pixels with a max per-channel delta of 1.

Cluster A <-> B and A <-> C: Differ by 0.9% of pixels with a max
per-channel delta of 11.

This CL modifies the image comparison to allow fuzzy matching with these
values.

Bug: 40118302
Change-Id: Iad0449727ea8e4bcc5ff45b3d207fe7aef6ebfcd
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6757627
Reviewed-by: Philip Rogers <[email protected]>
Commit-Queue: Sam Fortiner <[email protected]>
Cr-Commit-Position: refs/heads/main@{#1565140}
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The review process for this patch is being conducted in the Chromium project.

@chromium-wpt-export-bot chromium-wpt-export-bot merged commit 5c1715f into master Jan 6, 2026
19 checks passed
@chromium-wpt-export-bot chromium-wpt-export-bot deleted the chromium-export-e536bf6569 branch January 6, 2026 20:00
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4 participants