<svg version="1.1" baseProfile="full" 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">
  <!--======================================================================-->
  <!--=  SVG 1.1 2nd Edition Test Case                                     =-->
  <!--======================================================================-->
  <!--=  Copyright 2009 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="SVGWG" author="Peter Graffagnino" status="accepted"
    version="$Revision: 1.6 $" testname="$RCSfile: filters-displace-01-f.svg,v $">
    <d:testDescription xmlns="http://www.w3.org/1999/xhtml" href="http://www.w3.org/TR/SVG11/filters.html#feDisplacementMapElement">
      <p>
        Verify the basic capability to handle the feDisplacementMap filter
        node.  Six images should appear in 2 rows of 3.  On the left in each
        row a test image of a checker board is displayed.  In the middle
        column is the displacement map.  In the right-hand column is the
        result.  All displacement maps are generated as png files with gamma
        1.0 and must be interpreted linearly for the proper geometric
        displacement to occur.
      </p>
      <p>
        The top row tests a displacement map which displaces each pixel by an
        amount equivalent to a rotation of 20 degrees around the center of the
        image.  A blue reference rectangle is drawn on the result using an svg
        transform attribute to mimick the same 20 degree rotation.  The edges
        of the blue rectangle should be parallel to the grid lines in the
        displaced image.  Distortion of the grid pattern such that the grid
        lines are slightly curved is indicative of improper gamma handling in
        the viewer.
      </p>
      <p>
        The bottom row tests a displacement map which distorts the image
        spherically.
      </p>
      <p>
        In addition to feDisplacementMap, this test uses the 'feImage' and
        'rect' elements.  Figure labeling uses the text element.  The
        reference blue rectangle uses fill, fill-opacity, and transform.
      </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 rendered image should match the reference image. The edges
        of the blue rectangle must be parallel to the grid lines in the
        displaced image. The center of the bottommost right distorted image 
        should be on a gridpoint.
      </p>
    </d:passCriteria>
  </d:SVGTestCase>
  <title id="test-title">$RCSfile: filters-displace-01-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="DispMapChecker" filterUnits="objectBoundingBox" x="0" y="0" width="1" height="1">
        <feImage xlink:href="../images/DisplaceChecker.png"/>
      </filter>
      <filter id="RotateMap" filterUnits="objectBoundingBox" x="0" y="0" width="1" height="1">
        <feImage xlink:href="../images/rotate20.png"/>
      </filter>
      <filter id="SphereMap" filterUnits="objectBoundingBox" x="0" y="0" width="1" height="1">
        <feImage xlink:href="../images/sphere.png"/>
      </filter>
      <filter id="RotateMapTest" filterUnits="objectBoundingBox" x="0" y="0" width="1" height="1">
        <feImage result="Map" xlink:href="../images/rotate20.png"/>
        <feImage result="Texture" xlink:href="../images/DisplaceChecker.png"/>
        <feDisplacementMap in="Texture" in2="Map" scale="64" xChannelSelector="R" yChannelSelector="G"/>
      </filter>
      <filter id="SphereMapTest" filterUnits="objectBoundingBox" x="0" y="0" width="1" height="1">
        <feImage result="Map" xlink:href="../images/sphere.png"/>
        <feImage result="Texture" xlink:href="../images/DisplaceChecker.png"/>
        <feDisplacementMap in="Texture" in2="Map" scale="64" xChannelSelector="R" yChannelSelector="G"/>
      </filter>
    </defs>

    <g font-family="Arial" font-size="12" text-anchor="middle">
      <rect x="15" y="15" width="128" height="128" filter="url(#DispMapChecker)"/>
      <rect x="20" y="115" width="118" height="20" fill="#DDD"/>
      <text x="79" y="130">Checkerboard Image</text>

      <rect x="158" y="15" width="128" height="128" filter="url(#RotateMap)"/>
      <rect x="163" y="112" width="118" height="30" fill="#DDD"/>
      <text>
        <tspan x="222" y="125">Displacement Map</tspan>
        <tspan x="222" y="138">(20 deg. rotation)</tspan>
      </text>


      <rect x="301" y="15" width="128" height="128" filter="url(#RotateMapTest)"/>
      <rect x="-1" y="-1" width="2" height="2" transform="translate(365,79) rotate(20) scale(32)" fill="blue" fill-opacity="0.5"/>
      <text>
        <tspan x="365" y="160">Result</tspan>
        <tspan x="365" y="172">(overlayed with 20 deg.</tspan>
        <tspan x="365" y="184">rotated blue rectangle)</tspan>
      </text>


      <rect x="15" y="158" width="128" height="128" filter="url(#DispMapChecker)"/>
      <rect x="20" y="258" width="118" height="20" fill="#DDD"/>
      <text x="79" y="273">Checkerboard Image</text>


      <rect x="158" y="158" width="128" height="128" filter="url(#SphereMap)"/>
      <rect x="163" y="255" width="118" height="30" fill="#DDD"/>
      <text>
        <tspan x="222" y="268">Displacement Map</tspan>
        <tspan x="222" y="283">(spherical distortion)</tspan>
      </text>


      <rect x="301" y="200" width="128" height="128" filter="url(#SphereMapTest)"/>
      <text x="365" y="345">Result</text>
    </g>
  </g>
  <g font-family="SVGFreeSansASCII,sans-serif" font-size="32">
    <text id="revision" x="10" y="340" stroke="none" fill="black">$Revision: 1.6 $</text>
  </g>
  <rect id="test-frame" x="1" y="1" width="478" height="358" fill="none" stroke="#000000"/>
  <!-- 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>