objectBoundingBox-and-fePointLight-01.svg

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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" xmlns:xlink="http://www.w3.org/1999/xlink">

  <title>Testcase for objectBoundingBox with fePointLight</title>

  <!-- From https://bugzilla.mozilla.org/show_bug.cgi?id=544742 -->

  <defs>

    <filter id="light" primitiveUnits="objectBoundingBox">

      <feSpecularLighting lighting-color="blue" surfaceScale="5" specularConstant="10" specularExponent="6">

        <!-- Note: for z  the scalefactor is  31,622776601683793319988935444327

                     sqrt(bbox.width*bbox.width + bbox.height*bbox.height)/sqrt(2) -->

        <fePointLight x="0.75" y="1.5" z="-0.15811388300841896659994467722167"/>

      </feSpecularLighting>

      <feComposite operator="in" in2="SourceGraphic"/>

    </filter>

  </defs>

  <rect x="20" y="20" width="40" height="20" filter="url(#light)" fill="black" stroke="none" />

</svg>