<?xml version="1.0"?>
<svg xmlns="http://www.w3.org/2000/svg"
  xmlns:xlink="http://www.w3.org/1999/xlink"
  onload="addTransform()" viewBox="0 0 300 100" class="reftest-wait">
<!-- Test that the presence/absence of a patternTransform is correctly detected.

     Details are below but, in summary, the first two squares should contain the
     same pattern (a diagonal checkerbox) whilst the third square should contain
     a different pattern (actually the same pattern but WITHOUT the rotation).
     -->
<script>
function addTransform()
{
  var g = document.getElementById("patternBase");
  var list = g.patternTransform.baseVal;
  var t = document.documentElement.createSVGTransform();
  t.setRotate(45,50,50);
  list.appendItem(t);
  document.documentElement.removeAttribute("class");
}
</script>
<defs>
  <!-- 1. The base pattern that will be referenced by others.
       When the document loads, script will add a patternTransform to this
       pattern. It does this using *only SVG DOM APIs* (i.e. not setAttribute)
       so that we can test that when a transform is not specified by markup but
       is added via the DOM we still correctly detect its presence. -->
  <pattern id="patternBase" width="1" height="1">
    <rect width="50" height="50" fill="blue"/>
    <rect x="50" width="50" height="50" fill="red"/>
    <rect y="50" width="50" height="50" fill="red"/>
    <rect x="50" y="50" width="50" height="50" fill="blue"/>
  </pattern>
  <!-- 2. References the base pattern and should detect the base pattern's
       patternTransform (added by script) and inherit it. (SVG 1.1 F2 13.3,
       xlink:href 'Any attributes which are defined on the referenced element
       which are not defined on this element are inherited by this element.').
       Hence this pattern should look IDENTICAL to patternBase. -->
  <pattern xlink:href="#patternBase" id="patternRefWithoutTransform"/>
  <!-- 3. References the base pattern but patternTransform is defined (although
       empty) and hence the patternTransform should NOT be inherited and this
       pattern should look DIFFERENT to patternBase. -->
  <pattern xlink:href="#patternBase" id="patternRefWithTransform"
    patternTransform=""/>
  <!-- The case of a patternTransform being supplied by animation is covered by
       SMIL reftest anim-pattern-attr-presence-01.svg -->
</defs>
<rect width="100" height="100" stroke="black"
  fill="url(#patternBase)"/>
<g transform="translate(100)">
  <rect width="100" height="100" stroke="black"
    fill="url(#patternRefWithoutTransform)"/>
</g>
<g transform="translate(200)">
  <rect width="100" height="100" stroke="black"
    fill="url(#patternRefWithTransform)"/>
</g>
</svg>