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<!--
Any copyright is dedicated to the Public Domain.
http://creativecommons.org/publicdomain/zero/1.0/
-->
<svg xmlns="http://www.w3.org/2000/svg">
<title>Test 'feMorphology' with a negative value for its 'radius'</title>
<!--
From https://bugzilla.mozilla.org/show_bug.cgi?id=485786
The negative value should disable the primitive output, but should
not disable the entire filter effect.
-->
<filter id="f1">
<feMorphology operator="erode" radius="-1" result="transparentBlack"/>
<feMerge>
<feMergeNode in="SourceGraphic"/>
<feMergeNode in="transparentBlack"/>
</feMerge>
</filter>
<filter id="f2">
<feMorphology operator="erode" radius="-1"/>
</filter>
<rect width="100%" height="100%" fill="red"/>
<rect width="100%" height="100%" fill="lime" filter="url(#f1)"/>
<rect width="100%" height="100%" fill="red" filter="url(#f2)"/>
</svg>
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