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compositing: Send entire scene's scroll offsets when sending WebRender display lists (#31892)

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WebRender does not preserve spatial tree offsets when updating the
spatial tree. Updating the spatial tree of a pipeline can also
update the spatial tree of child pipelines. This change ensures that
WebRender always gets the scroll offsets of the entire scene when
modifying display lists in a way that may rebuild the spatial tree.

Fixes #31807.
This commit is contained in:
Martin Robinson 2024-04-03 08:34:16 +02:00 • committed by GitHub
parent cc082efbfd
commit 8aaff61334
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5 changed files with 130 additions and 13 deletions
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21
tests/wpt/meta/MANIFEST.json
View file

@ -261166,6 +261166,19 @@
{}
]
],
"transform-iframe-scroll-position.html": [
"efb7bab532606cd9893a4cb4223dbf4b7baa6f1d",
[
null,
[
[
"/css/css-transforms/transform-iframe-scroll-position-ref.html",
"=="
]
],
{}
]
],
"transform-image-001.html": [
"0565b8dbeeb86b82993847a139c8f38b66c0b163",
[
@ -416071,6 +416084,10 @@
"84f079c90bcb590e81ba39753edf723bcb123858",
[]
],
"transform-iframe-scroll-position-contents.html": [
"8efcdafc83cde63f89d56ea437a4852dd82cc206",
[]
],
"transform-lime-square.png": [
"8f939993332e1101b921615723ec6067f3bb90a3",
[]
@ -416208,6 +416225,10 @@
"b674c88d82f8a806a8a1cd20040302766d825202",
[]
],
"transform-iframe-scroll-position-ref.html": [
"e4d5da75d7a762b6c346640b2c72339a52d350ab",
[]
],
"transform-image-ref.html": [
"301c0f94bb7806caad2444583f3642d49aa4c969",
[]

21
tests/wpt/tests/css/css-transforms/support/transform-iframe-scroll-position-contents.html Normal file
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@ -0,0 +1,21 @@
<!DOCTYPE html>
<html>
<head>
<title>CSS Test (Transforms): iframe scroll position</title>
<link rel="author" title="Martin Robinson" href="mailto:mrobinson@igalia.com">
<style>
html { background: red; }
</style>
</head>
<body>
<!-- Make a large red page with a small green and blue square that is scrolled to immediately. -->
<div style="position: absolute; width: 50px; height: 25px; top: 3000px; left: 3000px; background: green;"></div>
<div style="position: absolute; width: 50px; height: 25px; top: 3025px; left: 3000px; background: blue;"></div>
<div style="width: 10000px; height: 10000px;"></div>
<script>
window.scrollTo(3000, 3000);
</script>
</body>
</html>

30
tests/wpt/tests/css/css-transforms/transform-iframe-scroll-position-ref.html Normal file
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@ -0,0 +1,30 @@
<!DOCTYPE html>
<html>
<head>
<title>CSS Test (Transforms): iframe scroll position</title>
<link rel="author" title="Martin Robinson" href="mailto:mrobinson@igalia.com">
<style>
#iframe {
border: 0;
width: 50px;
height: 50px;
border: solid;
}
#iframe div {
width: 25px;
height: 50px;
float: left;
}
.rotate {
transform: rotate(90deg);
}
</style>
<body onload="onLoad();">
<div id="iframe">
<div style="background: blue;"></div>
<div style="background: green;"></div>
</div>
</body>
</html>

29
tests/wpt/tests/css/css-transforms/transform-iframe-scroll-position.html Normal file
View file

@ -0,0 +1,29 @@
<!DOCTYPE html>
<html>
<head>
<title>CSS Test (Transforms): iframe scroll position</title>
<link rel="author" title="Martin Robinson" href="mailto:mrobinson@igalia.com">
<link rel="help" href="http://www.w3.org/TR/css-transforms-1/#transform-rendering">
<meta name="assert" content="This test ensures that when an iframe element is transformed, the scroll position of the iframe content is preserved.">
<link rel="match" href="transform-iframe-scroll-position-ref.html">
<style>
iframe {
border: 0;
width: 50px;
height: 50px;
border: solid;
}
.rotate {
transform: rotate(90deg);
}
</style>
<body onload="onLoad();">
<iframe id="iframe" src="support/transform-iframe-scroll-position-contents.html"></iframe>
<script>
function onLoad() {
iframe.classList.toggle("rotate");
}
</script>
</body>
</html>