1 files changed, 58 insertions, 0 deletions
diff --git a/layout/reftests/svg/pattern-transform-presence-01.svg b/layout/reftests/svg/pattern-transform-presence-01.svg
new file mode 100644
index 0000000000..f5e59e3bfc
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+++ b/layout/reftests/svg/pattern-transform-presence-01.svg
@@ -0,0 +1,58 @@
+<?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>