fune/testing/web-platform/tests/css/css-transforms/huge-length-tiny-scale.html
Xianzhu Wang 54ccd879ca Bug 1676495 [wpt PR 26475] - Improve will-change:transform raster scale adjustment, a=testonly
Automatic update from web-platform-tests
Improve will-change:transform raster scale adjustment

This fixes the issue of too big scale for will-change:transform layers
by
- Partly reverting crrev.com/c/2447650 to apply the change on tiny
scales only. When the ideal scale is not tiny, use the original policy
to clamp minimum scale to the native scale.
- Increasing kMinScaleRatioForWillChangeTransform from 0.1 to 0.25 to
reduce memory and number of tiles when the scale is bigger than ideal,
from 100x to 16x in worst cases.

Bug: 1146393
Change-Id: Ida5720f5126648c2fad0b9921781714fa006d346
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2527733
Reviewed-by: vmpstr <vmpstr@chromium.org>
Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#825998}

--

wpt-commits: 4cf34e3fc5d4d673dee780015ebf194db71fd500
wpt-pr: 26475
2020-11-11 16:39:24 +00:00

20 lines
480 B
HTML

<!DOCTYPE html>
<title>Huge lengths with tiny scale</title>
<link rel="author" title="Xianzhu Wang" href="mailto:wangxianzhu@chromium.org">
<link rel="help" href="https://crbug.com/1132991">
<link rel="match" href="huge-length-tiny-scale-ref.html">
<style>
body {
overflow: hidden;
}
div {
will-change: transform;
transform: scale(0.005);
transform-origin: 0 0;
width: 40000px;
height: 40000px;
background: green;
border: 2000px solid blue;
}
</style>
<div></div>