forked from mirrors/gecko-dev
c3bb93064b
Automatic update from web-platform-tests Force KeyframeModel::time_offset_ to be 0 for scroll-driven animations. KeyframeModel::CalculateActiveTime shifts all times by time_offset_, which is initialized when we start the animation on the compositor. But we don't want such shifting for scroll-driven animations, because cc::Animation::Tick gives the KeyframeModel a pause_time_ based on absolute progress (the current scroll position). Fix by making Animation::ComputeCompositorTimeOffset return 0 during Animation::StartAnimationOnCompositor, even if the scroll position is non-zero from an earlier scroll. Bug: 1431191 Change-Id: Ie2a2b7e099c12232e05900907231da1729ee6c34 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4498525 Commit-Queue: Steve Kobes <skobes@chromium.org> Reviewed-by: Kevin Ellis <kevers@chromium.org> Cr-Commit-Position: refs/heads/main@{#1138967} -- wpt-commits: 797d2099e320aa895aae4c445ab3cefc9379b23c wpt-pr: 39810
44 lines
678 B
HTML
44 lines
678 B
HTML
<!DOCTYPE html>
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<style>
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#scroller {
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overflow-y: auto;
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height: 200px;
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border: 2px solid green;
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position: relative;
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background: gray;
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}
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.spacer {
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height: 1000px;
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}
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#align {
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box-sizing: border-box;
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width: 100%;
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height: 50px;
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background: rgba(0, 0, 200, 0.2);
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color: white;
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position: absolute;
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border: 1px solid white;
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transform: translateY(200px);
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will-change: transform;
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}
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#marker {
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width: 100%;
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height: 50px;
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background: #640;
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position: absolute;
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top: 350px;
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}
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</style>
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<div id="scroller">
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<div id="align">TOP</div>
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<div class="spacer"></div>
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<div id="marker">BOTTOM</div>
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</div>
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<script>
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scroller.scrollTo(0, 200);
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</script>
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