<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="1.3" reviewer="ED" owner="AG" status="created"
    version="$Revision: 1.4 $" testname="$RCSfile: filters-conv-04-f.svg,v $">
    <d:testDescription xmlns="http://www.w3.org/1999/xhtml" href="http://www.w3.org/TR/SVG11/filters.html#feConvolveMatrixElementBiasAttribute">
      <p>
        Tests the 'bias' attribute on 'feConvolveMatrix'.
      </p>
      <p>
        The test uses a raster image and a vector graphic to test the effect
        that the 'bias' attribute on 'feConvolveMatrix' has.
      </p>
      <p>
        The first row of images in the test are four identical raster images.
        The first image is the original unfiltered image. The second has the
        filter kernel applied with no bias value specified. The third and fourth
        images both have a bias value specified for the filter.
      </p>
      <p>
        The second row of images in the test are four rectangle objects with a
        gradient fill. The gradient fill transitions from opaque green to
        transparent green. The first image is the original unfiltered graphic. The
        second graphic has a filter kernel applied with no bias value specified.
        The third and forth images both have a bias value specified for the
        filter.
      </p>
      <p>
        Behind each filter result there's a checkerboard pattern placed, to help
        verify that there's transparency in the lower row, but not in the upper.
      </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:
      </p>
      <ul>
        <li>
          The raster images in the top row appears more faded and coarse for each instance
          further to the right.
          <ul>
            <li>The first image (left most) must be smooth and clear</li>
            <li>
              The second image (second from the left) must contain the same colours as
              the first image but have course outlining around the objects.
            </li>
            <li>
              The third image (second from the right) must contain colour that is very faded
              but have course outlining around the faded objects.
            </li>
            <li>
              The last image (right most) must be completed faded such that all the colour
              in the first image appears to have gone to white. Some course outlining should
              appear in the image.
            </li>
          </ul>
        </li>
        <li>
          The top row has no checkerboard pattern visible where the filtered results are.
        </li>
        <li>
          The rectangle with a green gradient going from left to right appears
          more faded for each instance further to the right.
          <ul>
            <li>
              The first image (left most) must be a rect filled with a linear gradient that 
              transitions from solid green to transparent green.
            </li>
            <li>The second image (second from the left) must be identical to the first image.</li>
            <li>
              The third image (second from the right) must contain a linear gradient that transitions
              from a solid faded green to transparent faded green.
            </li>
            <li>
              The last image (right most) must contain a linear gradient that transitions from
              solid white to transparent white.
            </li>
          </ul>
        </li>
        <li>
          The bottom row must show 95% of the checkerboard pattern where the filtered results are
          since the gradients are transparent.
        </li>
      </ul>
    </d:passCriteria>
  </d:SVGTestCase>
  <title id="test-title">$RCSfile: filters-conv-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="convolve-without-bias" filterUnits="objectBoundingBox" x="0%" y="0%" width="100%" height="100%">
        <feConvolveMatrix kernelMatrix="1 1 1 1 -7 1 1 1 1" preserveAlpha="false"/>
      </filter>
      <filter id="convolve-with-bias05" filterUnits="objectBoundingBox" x="0%" y="0%" width="100%" height="100%">
        <feConvolveMatrix kernelMatrix="1 1 1 1 -7 1 1 1 1" preserveAlpha="false" bias="0.5"/>
      </filter>
      <filter id="convolve-with-bias1" filterUnits="objectBoundingBox" x="0%" y="0%" width="100%" height="100%">
        <feConvolveMatrix kernelMatrix="1 1 1 1 -7 1 1 1 1" preserveAlpha="false" bias="1"/>
      </filter>

      <linearGradient id="test_linear_gradient" gradientUnits="objectBoundingBox" x1="0" x2="1" y1="0" y2="0">
        <stop stop-color="#00FF00" stop-opacity="1" offset="0"/>
        <stop stop-color="#00FF00" stop-opacity="0" offset="1"/>
      </linearGradient>
    </defs>

    <g transform="translate(0, 20)">
      <image x="12" y="1" width="97" height="98" xlink:href="../images/DisplaceChecker.png"/>
      <image x="127" y="1" width="97" height="98" xlink:href="../images/DisplaceChecker.png"/>
      <image x="242" y="1" width="97" height="98" xlink:href="../images/DisplaceChecker.png"/>
      <image x="357" y="1" width="97" height="98" xlink:href="../images/DisplaceChecker.png"/>

      <image x="10" y="0" width="100" height="100" xlink:href="../images/townsville.jpg" />
      <image x="125" y="0" width="100" height="100" xlink:href="../images/townsville.jpg" filter="url(#convolve-without-bias)"/>
      <image x="240" y="0" width="100" height="100" xlink:href="../images/townsville.jpg" filter="url(#convolve-with-bias05)"/>
      <image x="355" y="0" width="100" height="100" xlink:href="../images/townsville.jpg" filter="url(#convolve-with-bias1)"/>
    </g>

    <g transform="translate(0, 110)">
      <image x="11" y="51" width="98" height="98" xlink:href="../images/DisplaceChecker.png"/>
      <image x="126" y="51" width="98" height="98" xlink:href="../images/DisplaceChecker.png"/>
      <image x="241" y="51" width="98" height="98" xlink:href="../images/DisplaceChecker.png"/>
      <image x="356" y="51" width="98" height="98" xlink:href="../images/DisplaceChecker.png"/>
            
      <rect fill="url(#test_linear_gradient)" stroke="black" x="10" y="50" width="100" height="100"/>
      <rect fill="url(#test_linear_gradient)" stroke="black" x="125" y="50" width="100" height="100" filter="url(#convolve-without-bias)"/>
      <rect fill="url(#test_linear_gradient)" stroke="black" x="240" y="50" width="100" height="100" filter="url(#convolve-with-bias05)"/>
      <rect fill="url(#test_linear_gradient)" stroke="black" x="355" y="50" width="100" height="100" filter="url(#convolve-with-bias1)"/>
    </g>
  </g>
  <g font-family="SVGFreeSansASCII,sans-serif" font-size="32">
    <text id="revision" x="10" y="340" stroke="none"
      fill="black">$Revision: 1.4 $</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>