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LibWeb: Make use of transform-box when calculating transforms

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We don't currently calculate the fill- or stroke-boxes of SVG elements,
so for now we use the content- and border-boxes respectively, as those
are the closest equivalents. The test will need updating when we do
support them.

Also, the test is a screenshot because of rendering differences when
applying transforms: a 20px box does not get painted the same as a 10px
box scaled up 2x. Otherwise that would be the more ideal form of test.
This commit is contained in:
Sam Atkins 2024-01-26 15:56:25 +00:00 • committed by Andreas Kling
parent 391cfdc085
commit e025bcc4f9
4 changed files with 117 additions and 2 deletions
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36
Tests/LibWeb/Ref/css-transform-box.html Normal file
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<!doctype html>
<link rel="match" href="reference/css-transform-box-ref.html" />
<style>
svg {
width: 400px;
height: 400px;
border: 1px solid #d9d9d9;
}
.box {
stroke-width: 4;
transform-origin: 20% 20%;
transform: scale(1.5);
}
div.box {
width: 40px;
height: 40px;
border: solid black;
border-width: 10px 20px 30px 40px;
margin: 80px;
}
</style>
<div class="box" style="transform-box: content-box">Hi</div>
<div class="box" style="transform-box: border-box">Hi</div>
<svg id="svg" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100">
<!-- NOTE: We don't currently calculate the fill or stroke boxes for SVG elements, so the test will need to be
rebaselined once we do! -->
<rect class="box" style="transform-box: fill-box" x="10" y="10" width="10" height="10" stroke="black" fill="yellow" />
<circle fill="red" r="1" cx="15" cy="15" />
<rect class="box" style="transform-box: stroke-box" x="10" y="40" width="10" height="10" stroke="black" fill="cyan" />
<circle fill="red" r="1" cx="15" cy="45" />
<rect class="box" style="transform-box: view-box" x="10" y="70" width="10" height="10" stroke="black" fill="green" />
<circle fill="red" r="1" cx="15" cy="75" />
</svg>

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Tests/LibWeb/Ref/reference/css-transform-box-ref.html Normal file
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<style>
* {
margin: 0;
}
body {
background-color: white;
}
</style>
<!-- To rebase:
1. Open css-backgrounds.html in Ladybird
2. Resize the window just above the width of the largest element
3. Right click > "Take Full Screenshot"
4. Update the image below:
-->
<img src="./images/css-transform-box-ref.png">

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Tests/LibWeb/Ref/reference/images/css-transform-box-ref.png Normal file
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