5 files changed, 87 insertions, 2 deletions
diff --git a/layout/reftests/svg/radialGradient-fr-01.svg b/layout/reftests/svg/radialGradient-fr-01.svg
new file mode 100644
index 000000000..2f28d3aba
--- /dev/null
+++ b/layout/reftests/svg/radialGradient-fr-01.svg
@@ -0,0 +1,27 @@
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink">
+  <title>Test gradient fr attribute</title>
+  <defs>
+    <radialGradient id="grad1" fr="100%">
+      <stop offset="0%" stop-color="red" />
+      <stop offset="100%" stop-color="lime" />
+    </radialGradient>
+    <radialGradient id="grad2" xlink:href="#grad1"/>
+    <style>
+      circle {
+        stroke-width: 3px;
+        stroke: lime;
+      }
+    </style>
+  </defs>
+  <rect width="100%" height="100%" fill="lime"/>
+
+  <circle cx="100" cy="100" r="50" fill="url(#grad1)" />
+
+  <circle cx="300" cy="100" r="50" fill="url(#grad2)" />
+</svg>
+
diff --git a/layout/reftests/svg/radialGradient-fr-02-ref.svg b/layout/reftests/svg/radialGradient-fr-02-ref.svg
new file mode 100644
index 000000000..c256f72a2
--- /dev/null
+++ b/layout/reftests/svg/radialGradient-fr-02-ref.svg
@@ -0,0 +1,28 @@
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink">
+  <title>Test gradient fr attribute</title>
+  <defs>
+    <radialGradient id="grad1">
+      <stop offset="0%" stop-color="red" />
+      <stop offset="20%" stop-color="red" />
+      <stop offset="100%" stop-color="lime" />
+    </radialGradient>
+    <style>
+      .cover {
+        stroke-width: 3px;
+        stroke: lime;
+        fill: none;
+        image-rendering: optimizeSpeed;
+      }
+    </style>
+  </defs>
+  <rect width="100%" height="100%" fill="lime"/>
+
+  <circle cx="100" cy="100" r="50" fill="url(#grad1)" />
+  <circle class="cover" cx="100" cy="100" r="50" fill="none"/>
+</svg>
+
diff --git a/layout/reftests/svg/radialGradient-fr-02.svg b/layout/reftests/svg/radialGradient-fr-02.svg
new file mode 100644
index 000000000..1933203be
--- /dev/null
+++ b/layout/reftests/svg/radialGradient-fr-02.svg
@@ -0,0 +1,27 @@
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/publicdomain/zero/1.0/
+-->
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink">
+  <title>Test gradient fr attribute</title>
+  <defs>
+    <radialGradient id="grad1" fr="10%">
+      <stop offset="0%" stop-color="red" />
+      <stop offset="100%" stop-color="lime" />
+    </radialGradient>
+    <style>
+      .cover {
+        stroke-width: 3px;
+        stroke: lime;
+        fill: none;
+        image-rendering: optimizeSpeed;
+      }
+    </style>
+  </defs>
+  <rect width="100%" height="100%" fill="lime"/>
+
+  <circle cx="100" cy="100" r="50" fill="url(#grad1)" />
+  <circle class="cover" cx="100" cy="100" r="50" />
+</svg>
+
diff --git a/layout/reftests/svg/reftest.list b/layout/reftests/svg/reftest.list
index e596feae8..520adc9e6 100644
--- a/layout/reftests/svg/reftest.list
+++ b/layout/reftests/svg/reftest.list
@@ -290,6 +290,8 @@ fuzzy-if(skiaContent,3,5) == pattern-scale-01c.svg pattern-scale-01-ref.svg
 == radialGradient-basic-02.svg pass.svg
 fuzzy-if(cocoaWidget,4,15982) fuzzy-if(winWidget,4,92) fuzzy-if(skiaContent,4,60) == radialGradient-basic-03.svg radialGradient-basic-03-ref.svg
 == radialGradient-basic-04.svg pass.svg
+== radialGradient-fr-01.svg pass.svg
+fuzzy(1,3235) fuzzy-if(winWidget,1,6704) == radialGradient-fr-02.svg radialGradient-fr-02-ref.svg
 fuzzy-if(skiaContent,1,3600) == rect-01.svg pass.svg
 == rect-02.svg pass.svg
 == rect-03.svg pass.svg
diff --git a/layout/svg/nsSVGGradientFrame.cpp b/layout/svg/nsSVGGradientFrame.cpp
index 217ab8c4a..2d7684f5a 100644
--- a/layout/svg/nsSVGGradientFrame.cpp
+++ b/layout/svg/nsSVGGradientFrame.cpp
@@ -623,7 +623,7 @@ nsSVGRadialGradientFrame::GradientVectorLengthIsZero()
 already_AddRefed<gfxPattern>
 nsSVGRadialGradientFrame::CreateGradient()
 {
-  float cx, cy, r, fx, fy;
+  float cx, cy, r, fx, fy, fr;
 
   cx = GetLengthValue(dom::SVGRadialGradientElement::ATTR_CX);
   cy = GetLengthValue(dom::SVGRadialGradientElement::ATTR_CY);
@@ -631,6 +631,7 @@ nsSVGRadialGradientFrame::CreateGradient()
   // If fx or fy are not set, use cx/cy instead
   fx = GetLengthValue(dom::SVGRadialGradientElement::ATTR_FX, cx);
   fy = GetLengthValue(dom::SVGRadialGradientElement::ATTR_FY, cy);
+  fr = GetLengthValue(dom::SVGRadialGradientElement::ATTR_FR);
 
   if (fx != cx || fy != cy) {
     // The focal point (fFx and fFy) must be clamped to be *inside* - not on -
@@ -651,7 +652,7 @@ nsSVGRadialGradientFrame::CreateGradient()
     }
   }
 
-  RefPtr<gfxPattern> pattern = new gfxPattern(fx, fy, 0, cx, cy, r);
+  RefPtr<gfxPattern> pattern = new gfxPattern(fx, fy, fr, cx, cy, r);
   return pattern.forget();
 }