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<meta charset="utf-8">
<title>filter primitive subregion: Clip to filter primitive subregion</title>
<link rel="author" title="Chris Lilley" href="mailto:[email protected]">
<link rel="help" href="https://drafts.fxtf.org/filter-effects/#FilterPrimitiveSubRegion">
<link rel="match" href="filter-subregion-01-ref.html">
<p>Test passes if two semi-transparent green rectangles are on top of the
blue boxes to the left, and one opaque green rectangle on the blue box
to the right.</p>
<!-- this is example filtersubregion00.svg from the specification -->
<svg width="400" height="400">
<defs>
<filter id="flood" x="0" y="0" width="100%" height="100%" primitiveUnits="objectBoundingBox">
<feFlood x="25%" y="25%" width="50%" height="50%"
flood-color="green" flood-opacity="0.75"/>
</filter>
<filter id="blend" primitiveUnits="objectBoundingBox">
<feBlend x="25%" y="25%" width="50%" height="50%"
in2="SourceGraphic" mode="multiply"/>
</filter>
<filter id="merge" primitiveUnits="objectBoundingBox">
<feMerge x="25%" y="25%" width="50%" height="50%">
<feMergeNode in="SourceGraphic"/>
<feMergeNode in="FillPaint"/>
</feMerge>
</filter>
</defs>
<g fill="none" stroke="blue" stroke-width="4">
<rect width="200" height="200"/>
<line x2="200" y2="200"/>
<line x1="200" y2="200"/>
</g>
<circle fill="green" filter="url(#flood)" cx="100" cy="100" r="90"/>
<g transform="translate(200 0)">
<g fill="none" stroke="blue" stroke-width="4">
<rect width="200" height="200"/>
<line x2="200" y2="200"/>
<line x1="200" y2="200"/>
</g>
<circle fill="green" filter="url(#blend)" cx="100" cy="100" r="90"/>
</g>
<g transform="translate(0 200)">
<g fill="none" stroke="blue" stroke-width="4">
<rect width="200" height="200"/>
<line x2="200" y2="200"/>
<line x1="200" y2="200"/>
</g>
<circle fill="green" fill-opacity="0.5" filter="url(#merge)" cx="100" cy="100" r="90"/>
</g>
</svg>
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