commit | d5bc1f8e51fecfc2f359b0c811050593abb11dfa | [log] [tgz] |
---|---|---|
author | L. David Baron <dbaron@chromium.org> | Fri Sep 10 02:16:52 2021 |
committer | Blink WPT Bot <blink-w3c-test-autoroller@chromium.org> | Fri Sep 10 02:45:40 2021 |
tree | c4ed4e8fca2839ae64cd916c1962df295bd403c9 | |
parent | d99afaaa4889e460d6afae6233e63662ea52e875 [diff] |
Make TransformState::Move accumulate into existing transform more often. The substantive change here is the removal of the test of accumulating_transform_ in TransformState::Move. At least when direction_ is kApplyTransformDirection, optimizing away the modification to the existing transform into a move is not safe. The remainder of the code changes are removing accumulating_transform_, since its remaining uses are all in DCHECK()s and its meaning is somewhat unclear. It's not clear whether it's intended to be an indicator for whether accumulated_transform_ would be non-null were it not for the caching optimization in TransformState::FlattenWithTransform, or whether it's an indication of the state of flattening or preserve-3d. Without the code change here, virtual/transform-interop-disabled/external/wpt/css/css-transforms/transform-getBoundingClientRect-001.html fails (with 75 rather than 125), but external/wpt/css/css-transforms/transform-getBoundingClientRect-001.html passes both with and without the change. Bug: 1247858 Change-Id: Id32a11b2bf66757b0dbbab251c598222f9d120a7 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3152179 Reviewed-by: Xianzhu Wang <wangxianzhu@chromium.org> Commit-Queue: David Baron <dbaron@chromium.org> Cr-Commit-Position: refs/heads/main@{#920070}
The web-platform-tests Project is a cross-browser test suite for the Web-platform stack. Writing tests in a way that allows them to be run in all browsers gives browser projects confidence that they are shipping software that is compatible with other implementations, and that later implementations will be compatible with their implementations. This in turn gives Web authors/developers confidence that they can actually rely on the Web platform to deliver on the promise of working across browsers and devices without needing extra layers of abstraction to paper over the gaps left by specification editors and implementors.
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