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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 and
+ https://bugzilla.mozilla.org/show_bug.cgi?id=1432250
+
+ The negative value should disable the primitive effect and output
+ the input image.
+ -->
+ <filter id="f1">
+ <feMorphology operator="dilate" radius="-1"/>
+ </filter>
+ <filter id="f2">
+ <feMorphology operator="dilate" radius="-1 50"/>
+ </filter>
+ <rect width="100%" height="100%" fill="red"/>
+ <rect width="50%" height="100%" fill="lime" filter="url(#f1)"/>
+ <rect x="50%" width="50%" height="100%" fill="lime" filter="url(#f2)"/>
+</svg>