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<!DOCTYPE html>
<meta charset="utf-8">
<title>backdrop-filter: Correctly apply reference filter</title>
<link rel="author" href="mailto:masonf@chromium.org">
<link rel="help" href="https://drafts.fxtf.org/filter-effects-2/#BackdropFilterProperty">
<link rel="match" href="backdrop-filter-clip-rect-ref.html">
<div>
<p>Expected: A green box, color-inverted inside the short, wide box with a<br>
blue border and rounded corners, and not color-inverted anywhere else. In<br>
particular, there should be no color inversion inside the tall, narrow box,<br>
or anywhere outside that.</p>
</div>
<div class="box"></div>
<div class="navbar">
<div class="menu"></div>
<div class="menu2"></div>
</div>
<svg xmlns="http://www.w3.org/2000/svg" version="1.1" style="display:none">
<defs>
<filter id="svgInvert">
<feColorMatrix in="SourceGraphic" type="matrix" values="-1 0 0 0 1
0 -1 0 0 1
0 0 -1 0 1
0 0 0 1 0"/>
</filter>
</defs>
</svg>
<style>
div {
position: absolute;
}
.box {
width: 200px;
height: 200px;
top: 100px;
left: 100px;
background: green;
}
.navbar {
width: 300px;
height: 50px;
top: 150px;
left: 50px;
border: 2px solid blue;
backdrop-filter: url(#svgInvert);
border-radius: 10px 20px 30px 40px;
}
.menu {
width: 100px;
height: 150px;
top: 50px;
left: 95px;
border: 2px solid red;
}
.menu2 {
width: 100px;
height: 30px;
top: -34px;
left: 95px;
border: 2px solid red;
}
</style>
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