<svg id="svg-root" width="100%" height="100%"
  viewBox="0 0 480 360" xmlns="http://www.w3.org/2000/svg"
  xmlns:xlink="http://www.w3.org/1999/xlink">
  <!--======================================================================-->
  <!--=  Copyright 2008 World Wide Web Consortium, (Massachusetts          =-->
  <!--=  Institute of Technology, European Research Consortium for         =-->
  <!--=  Informatics and Mathematics (ERCIM), Keio University).            =-->
  <!--=  All Rights Reserved.                                              =-->
  <!--=  See http://www.w3.org/Consortium/Legal/.                          =-->
  <!--======================================================================-->
  <d:SVGTestCase xmlns:d="http://www.w3.org/2000/02/svg/testsuite/description/"
    template-version="1.4" reviewer="[reviewer]" author="[author]" status="empty"
    version="$Revision: 1.1 $" testname="$RCSfile: filters-composite-04-f.svg,v $">
    <d:testDescription xmlns="http://www.w3.org/1999/xhtml" href="http://www.w3.org/TR/SVG11/filters.html#feCompositeElement">
      <p>
        Test feComposite and the arithmetic operator to implement a simple dissolve operation.
      </p>
    </d:testDescription>
    <d:operatorScript xmlns="http://www.w3.org/1999/xhtml">
      <p>
        Run the test. No interaction required.
      </p>
    </d:operatorScript>
    <d:passCriteria xmlns="http://www.w3.org/1999/xhtml">
      <p>
        The test has passed if there are four images visible, each in
        different stages of dissolving the bird in the foreground into the
        tree in the background.
      </p>
    </d:passCriteria>
  </d:SVGTestCase>
  <title id="test-title">$RCSfile: filters-composite-04-f.svg,v $</title>
  <defs>
    <font-face
      font-family="SVGFreeSansASCII"
      unicode-range="U+0-7F">
      <font-face-src>
        <font-face-uri xlink:href="../resources/SVGFreeSans.svg#ascii"/>
      </font-face-src>
    </font-face>
  </defs>
  <g id="test-body-content" font-family="SVGFreeSansASCII,sans-serif" font-size="18">
    <defs>
      <filter id="dissolve1" x="0" y="0" width="1" height="1">
        <feImage xlink:href="../images/stefan_252_tRNS_opti.png" result="bird"/>
        <feComposite operator="arithmetic" in="SourceGraphic" in2="bird" k1="0" k2="0.5" k3="0.5" k4="0"/>
      </filter>
      <filter id="dissolve2" x="0" y="0" width="1" height="1">
        <feImage xlink:href="../images/stefan_252_tRNS_opti.png" result="bird"/>
        <feComposite operator="arithmetic" in="SourceGraphic" in2="bird" k1="0" k2="0.1" k3="0.9" k4="0"/>
      </filter>
      <filter id="dissolve3" x="0" y="0" width="1" height="1">
        <feImage xlink:href="../images/stefan_252_tRNS_opti.png" result="bird"/>
        <feComposite operator="arithmetic" in="SourceGraphic" in2="bird" k1="0" k2="0.75" k3="0.25" k4="0"/>
      </filter>
      <filter id="dissolve4" x="0" y="0" width="1" height="1">
        <feImage xlink:href="../images/stefan_252_tRNS_opti.png" result="bird"/>
        <feComposite operator="arithmetic" in="SourceGraphic" in2="bird" k1="0" k2="0.25" k3="0.75" k4="0"/>
      </filter>
    </defs>
    
    <image width="120" height="80" xlink:href="../images/tree.jpg" filter="url(#dissolve1)" transform="translate(100 80)"/>
    <image width="120" height="80" xlink:href="../images/tree.jpg" filter="url(#dissolve2)" transform="translate(250 80)"/>
    <image width="120" height="80" xlink:href="../images/tree.jpg" filter="url(#dissolve3)" transform="translate(100 190)"/>
    <image width="120" height="80" xlink:href="../images/tree.jpg" filter="url(#dissolve4)" transform="translate(250 190)"/>
  </g>
  <g font-family="SVGFreeSansASCII,sans-serif" font-size="32">
    <text id="revision" x="10" y="340" stroke="none"
      fill="black">$Revision: 1.1 $</text>
  </g>
  <rect id="test-frame" x="1" y="1" width="478" height="358" fill="none" stroke="#000"/>
  <!-- comment out this watermark once the test is approved -->
  <g id="draft-watermark">
    <rect x="1" y="1" width="478" height="20" fill="red" stroke="black" stroke-width="1"/>
    <text font-family="SVGFreeSansASCII,sans-serif" font-weight="bold" font-size="20" x="240"
      text-anchor="middle" y="18" stroke-width="0.5" stroke="black" fill="white">DRAFT</text>
  </g>
</svg>