Bug 657862 - Relative SVG arc path segments are broken. r=longsonr.

--HG--
extra : rebase_source : 8897f5f5358f67708f92f50e1061d1947ae011a1

content/svg/content/src/SVGPathData.cpp

@@ -404,7 +404,7 @@ SVGPathData::ConstructPath(gfxContext *aCtx) const
     case nsIDOMSVGPathSeg::PATHSEG_ARC_REL:
     {
       gfxPoint radii(mData[i], mData[i+1]);
-      gfxPoint segEnd = gfxPoint(mData[i+5], mData[i+6]);
+      segEnd = gfxPoint(mData[i+5], mData[i+6]);
       if (segType == nsIDOMSVGPathSeg::PATHSEG_ARC_REL) {
         segEnd += segStart;
       }

layout/reftests/svg/path-05.svg

@@ -0,0 +1,26 @@
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/licenses/publicdomain/
+-->
+<svg xmlns="http://www.w3.org/2000/svg"
+     shape-rendering="crispEdges">
+
+  <title>Testcase for path arc handling</title>
+
+  <!-- From https://bugzilla.mozilla.org/show_bug.cgi?id=657862 -->
+
+  <rect width="100%" height="100%" fill="lime"/>
+
+  <!-- Check that arc paints over entire circle: -->
+
+  <circle cx="100" cy="100" r="79" fill="red"/>
+  <path d="M20,100 A80,80 0,0,1 180,100 A80,80 0,0,1 20,100" fill="lime"/>
+
+  <!-- Check that arc does not paint outside circle: -->
+
+  <g transform="translate(200,0)">
+    <path d="M20,100 A80,80 0,0,1 180,100 A80,80 0,0,1 20,100" fill="red"/>
+    <circle cx="100" cy="100" r="81" fill="lime"/>
+  </g>
+
+</svg>

layout/reftests/svg/reftest.list

@@ -152,6 +152,7 @@ random-if(gtk2Widget) == objectBoundingBox-and-fePointLight-01.svg objectBoundin
 == path-02.svg pass.svg
 == path-03.svg pass.svg
 == path-04.svg pass.svg
+== path-05.svg pass.svg
 == pathLength-01.svg pass.svg
 == pathLength-02.svg pass.svg
 == pattern-invalid-01.svg pattern-invalid-01-ref.svg