From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 21:33:14 +0200
Subject: Adding upstream version 115.7.0esr.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
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 .../svg/smil/style/anim-css-font-1-ref.svg         |  76 +++++++++
 layout/reftests/svg/smil/style/anim-css-font-1.svg | 144 ++++++++++++++++++
 .../style/anim-css-fontsize-1-from-by-pct-pct.svg  |  16 ++
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 .../style/anim-css-fontsize-1-from-to-px-no.svg    |  17 +++
 .../style/anim-css-fontsize-1-from-to-px-pct.svg   |  16 ++
 .../style/anim-css-fontsize-1-from-to-px-px.svg    |  16 ++
 .../svg/smil/style/anim-css-fontsize-1-ref.svg     |  20 +++
 .../style/anim-css-fontsize-2-from-by-em-em.svg    |  16 ++
 .../style/anim-css-fontsize-2-from-by-px-em.svg    |  16 ++
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 .../smil/style/anim-css-letterspacing-1-ref.svg    |   3 +
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 .../style/anim-css-strokewidth-4-from-by-em-em.svg |  19 +++
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 .../svg/smil/style/anim-css-strokewidth-4-ref.svg  |  29 ++++
 .../svg/smil/style/anim-css-wordspacing-1-ref.svg  |   3 +
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 .../style/anim-mapped-fontsize-1-from-to-no-no.svg |  17 +++
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 .../style/anim-mapped-fontsize-1-from-to-px-no.svg |  17 +++
 .../reftests/svg/smil/style/anim-standard-ref.svg  |   3 +
 layout/reftests/svg/smil/style/important-set-1.svg |   8 +
 layout/reftests/svg/smil/style/important-set-2.svg |  11 ++
 .../svg/smil/style/namespaced-property-1.svg       |   6 +
 layout/reftests/svg/smil/style/reftest.list        | 169 +++++++++++++++++++++
 125 files changed, 2712 insertions(+)
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(limited to 'layout/reftests/svg/smil/style')

diff --git a/layout/reftests/svg/smil/style/anim-css-color-1-by-ident-hex.svg b/layout/reftests/svg/smil/style/anim-css-color-1-by-ident-hex.svg
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index 0000000000..acda8e0c50
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-color-1-by-ident-hex.svg
@@ -0,0 +1,17 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { color: indigo; fill: currentColor; stroke: black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "color",
+                           "by"            : "#AAF573" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-color-1-from-by-hex-hex.svg b/layout/reftests/svg/smil/style/anim-css-color-1-from-by-hex-hex.svg
new file mode 100644
index 0000000000..42f4b65b6f
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-color-1-from-by-hex-hex.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { color: indigo; fill: currentColor; stroke: black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "color",
+                           "from"          : "#4B0082",
+                           "by"            : "#AAF573" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-color-1-from-by-ident-hex.svg b/layout/reftests/svg/smil/style/anim-css-color-1-from-by-ident-hex.svg
new file mode 100644
index 0000000000..8b480cd864
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-color-1-from-by-ident-hex.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { color: indigo; fill: currentColor; stroke: black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "color",
+                           "from"          : "indigo",
+                           "by"            : "#AAF573" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-color-1-from-to-hex-hex.svg b/layout/reftests/svg/smil/style/anim-css-color-1-from-to-hex-hex.svg
new file mode 100644
index 0000000000..f15b4a3c22
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-color-1-from-to-hex-hex.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { color: indigo; fill: currentColor; stroke: black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "color",
+                           "from"          : "#4B0082",
+                           "to"            : "#F5F5F5" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-color-1-from-to-ident-ident.svg b/layout/reftests/svg/smil/style/anim-css-color-1-from-to-ident-ident.svg
new file mode 100644
index 0000000000..553b95f12f
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-color-1-from-to-ident-ident.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { color: indigo; fill: currentColor; stroke: black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "color",
+                           "from"          : "indigo",
+                           "to"            : "whitesmoke" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-color-1-to-ident-hex.svg b/layout/reftests/svg/smil/style/anim-css-color-1-to-ident-hex.svg
new file mode 100644
index 0000000000..727107841f
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-color-1-to-ident-hex.svg
@@ -0,0 +1,17 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { color: indigo; fill: currentColor; stroke: black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "color",
+                           "to"            : "#F5F5F5" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-color-1-to-ident-ident.svg b/layout/reftests/svg/smil/style/anim-css-color-1-to-ident-ident.svg
new file mode 100644
index 0000000000..9702370931
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-color-1-to-ident-ident.svg
@@ -0,0 +1,17 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { color: indigo; fill: currentColor; stroke: black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "color",
+                           "to"            : "whitesmoke" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-color-2-paced-rgb.svg b/layout/reftests/svg/smil/style/anim-css-color-2-paced-rgb.svg
new file mode 100644
index 0000000000..c44f16b7c5
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-color-2-paced-rgb.svg
@@ -0,0 +1,20 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { color: yellow; fill: currentColor; stroke: black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "color",
+                           "calcMode"      : "paced",
+                           "values" : "rgb(0, 10, 20); " +
+                                      "rgb(20, 50, 80); " +
+                                      "rgb(140, 130, 120)" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-color-3-by-ident-ident.svg b/layout/reftests/svg/smil/style/anim-css-color-3-by-ident-ident.svg
new file mode 100644
index 0000000000..1c6d06895c
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-color-3-by-ident-ident.svg
@@ -0,0 +1,19 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <!-- This is a test with a named color (DarkSlateGray == rgb(47, 79, 79)) -->
+  <!-- being added to another color (DarkOliveGreen == rbg(85, 107, 47)).   -->
+  <style>
+    rect { color: DarkOliveGreen; fill: currentColor; stroke: Black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "color",
+                           "by"            : "DarkSlateGray" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-color-3-from-by-ident-ident.svg b/layout/reftests/svg/smil/style/anim-css-color-3-from-by-ident-ident.svg
new file mode 100644
index 0000000000..cd34fc58df
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-color-3-from-by-ident-ident.svg
@@ -0,0 +1,20 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <!-- This is a test with a named color (DarkSlateGray == rgb(47, 79, 79)) -->
+  <!-- being added to another color (DarkOliveGreen == rbg(85, 107, 47)).   -->
+  <style>
+    rect { color: DarkOliveGreen; fill: currentColor; stroke: Black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "color",
+                           "from"          : "DarkOliveGreen",
+                           "by"            : "DarkSlateGray" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-color-3-from-by-rgb-ident.svg b/layout/reftests/svg/smil/style/anim-css-color-3-from-by-rgb-ident.svg
new file mode 100644
index 0000000000..163c392e00
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-color-3-from-by-rgb-ident.svg
@@ -0,0 +1,20 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <!-- This is a test with a named color (DarkSlateGray == rgb(47, 79, 79)) -->
+  <!-- being added to another color (DarkOliveGreen == rbg(85, 107, 47)).   -->
+  <style>
+    rect { color: DarkOliveGreen; fill: currentColor; stroke: Black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "color",
+                           "from"          : "rgb(85, 107, 47)",
+                           "by"            : "DarkSlateGray" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fill-1-by-ident-curcol.svg b/layout/reftests/svg/smil/style/anim-css-fill-1-by-ident-curcol.svg
new file mode 100644
index 0000000000..b30fa4963f
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fill-1-by-ident-curcol.svg
@@ -0,0 +1,17 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { fill: Indigo; stroke: black; color: #AAF573}
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "fill",
+                           "by"            : "currentColor" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fill-1-by-ident-hex.svg b/layout/reftests/svg/smil/style/anim-css-fill-1-by-ident-hex.svg
new file mode 100644
index 0000000000..cdd1dd1d52
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fill-1-by-ident-hex.svg
@@ -0,0 +1,17 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { fill: Indigo; stroke: black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "fill",
+                           "by"            : "#AAF573" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fill-1-from-by-curcol-hex.svg b/layout/reftests/svg/smil/style/anim-css-fill-1-from-by-curcol-hex.svg
new file mode 100644
index 0000000000..e2832b174a
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fill-1-from-by-curcol-hex.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { fill: Indigo; stroke: black; color: Indigo }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "fill",
+                           "from"          : "currentColor",
+                           "by"            : "#AAF573" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fill-1-from-by-hex-curcol.svg b/layout/reftests/svg/smil/style/anim-css-fill-1-from-by-hex-curcol.svg
new file mode 100644
index 0000000000..fca9cc1d7a
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fill-1-from-by-hex-curcol.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { fill: Indigo; stroke: black; color: #AAF573 }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "fill",
+                           "from"          : "#4B0082",
+                           "by"            : "currentColor" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fill-1-from-by-hex-hex.svg b/layout/reftests/svg/smil/style/anim-css-fill-1-from-by-hex-hex.svg
new file mode 100644
index 0000000000..61dc61da05
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fill-1-from-by-hex-hex.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { fill: Indigo; stroke: black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "fill",
+                           "from"          : "#4B0082",
+                           "by"            : "#AAF573" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fill-1-from-by-ident-hex.svg b/layout/reftests/svg/smil/style/anim-css-fill-1-from-by-ident-hex.svg
new file mode 100644
index 0000000000..a6fe27433a
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fill-1-from-by-ident-hex.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { fill: Indigo; stroke: black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "fill",
+                           "from"          : "indigo",
+                           "by"            : "#AAF573" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fill-1-from-to-curcol-hex.svg b/layout/reftests/svg/smil/style/anim-css-fill-1-from-to-curcol-hex.svg
new file mode 100644
index 0000000000..86cc1fedd7
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fill-1-from-to-curcol-hex.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { fill: Indigo; stroke: black; color: Indigo; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "fill",
+                           "from"          : "currentColor",
+                           "to"            : "#F5F5F5" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fill-1-from-to-hex-curcol.svg b/layout/reftests/svg/smil/style/anim-css-fill-1-from-to-hex-curcol.svg
new file mode 100644
index 0000000000..6cb3da74fd
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fill-1-from-to-hex-curcol.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { fill: Indigo; stroke: black; color: Whitesmoke; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "fill",
+                           "from"          : "#4B0082",
+                           "to"            : "currentColor" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fill-1-from-to-hex-hex.svg b/layout/reftests/svg/smil/style/anim-css-fill-1-from-to-hex-hex.svg
new file mode 100644
index 0000000000..f5f8114da9
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fill-1-from-to-hex-hex.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { fill: Indigo; stroke: black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "fill",
+                           "from"          : "#4B0082",
+                           "to"            : "#F5F5F5" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fill-1-from-to-ident-ident.svg b/layout/reftests/svg/smil/style/anim-css-fill-1-from-to-ident-ident.svg
new file mode 100644
index 0000000000..e1b968d35a
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fill-1-from-to-ident-ident.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { fill: Indigo; stroke: black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "fill",
+                           "from"          : "indigo",
+                           "to"            : "whitesmoke" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fill-1-ref.svg b/layout/reftests/svg/smil/style/anim-css-fill-1-ref.svg
new file mode 100644
index 0000000000..767407048d
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fill-1-ref.svg
@@ -0,0 +1,32 @@
+<svg xmlns="http://www.w3.org/2000/svg">
+  <style>
+    rect { stroke: black; }
+  </style>
+  <rect x="20px" y="20px" width="15px" height="15px"
+        style="fill: #4B0082">
+  </rect>
+  <rect x="70px" y="20px" width="15px" height="15px"
+        style="fill: #4B0082">
+  </rect>
+  <rect x="120px" y="20px" width="15px" height="15px"
+        style="fill: #652593">
+  </rect>
+  <rect x="20px" y="70px" width="15px" height="15px"
+        style="fill: #8B5CAD">
+  </rect>
+  <rect x="70px" y="70px" width="15px" height="15px"
+        style="fill: #9F79BB">
+  </rect>
+  <rect x="120px" y="70px" width="15px" height="15px"
+        style="fill: #CBB8D8">
+  </rect>
+  <rect x="20px" y="120px" width="15px" height="15px"
+        style="fill: #D3C4DE">
+  </rect>
+  <rect x="70px" y="120px" width="15px" height="15px"
+        style="fill: #F5F5F5">
+  </rect>
+  <rect x="120px" y="120px" width="15px" height="15px"
+        style="fill: #F5F5F5">
+  </rect>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fill-1-to-ident-curcol.svg b/layout/reftests/svg/smil/style/anim-css-fill-1-to-ident-curcol.svg
new file mode 100644
index 0000000000..65a6812694
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fill-1-to-ident-curcol.svg
@@ -0,0 +1,17 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { fill: Indigo; stroke: black; color: Whitesmoke; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "fill",
+                           "to"            : "currentColor" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fill-1-to-ident-hex.svg b/layout/reftests/svg/smil/style/anim-css-fill-1-to-ident-hex.svg
new file mode 100644
index 0000000000..73540fcc49
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fill-1-to-ident-hex.svg
@@ -0,0 +1,17 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { fill: Indigo; stroke: black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "fill",
+                           "to"            : "#F5F5F5" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fill-1-to-ident-ident.svg b/layout/reftests/svg/smil/style/anim-css-fill-1-to-ident-ident.svg
new file mode 100644
index 0000000000..9b1010426a
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fill-1-to-ident-ident.svg
@@ -0,0 +1,17 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { fill: Indigo; stroke: black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "fill",
+                           "to"            : "whitesmoke" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fill-2-paced-rgb.svg b/layout/reftests/svg/smil/style/anim-css-fill-2-paced-rgb.svg
new file mode 100644
index 0000000000..4c1e16c53f
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fill-2-paced-rgb.svg
@@ -0,0 +1,20 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { fill: yellow; stroke: black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "fill",
+                           "calcMode"      : "paced",
+                           "values" : "rgb(0, 10, 20); " +
+                                      "rgb(20, 50, 80); " +
+                                      "rgb(140, 130, 120)" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fill-2-ref.svg b/layout/reftests/svg/smil/style/anim-css-fill-2-ref.svg
new file mode 100644
index 0000000000..1058125a66
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fill-2-ref.svg
@@ -0,0 +1,32 @@
+<svg xmlns="http://www.w3.org/2000/svg">
+  <style>
+    rect { stroke: black; }
+  </style>
+  <rect x="20px" y="20px" width="15px" height="15px"
+        style="fill: yellow">
+  </rect>
+  <rect x="70px" y="20px" width="15px" height="15px"
+        style="fill: rgb(0, 10, 20)">
+  </rect>
+  <rect x="120px" y="20px" width="15px" height="15px"
+        style="fill: rgb(9, 28, 47)">
+  </rect>
+  <rect x="20px" y="70px" width="15px" height="15px"
+        style="fill: rgb(28, 55, 83)">
+  </rect>
+  <rect x="70px" y="70px" width="15px" height="15px"
+        style="fill: rgb(49, 69, 90)">
+  </rect>
+  <rect x="120px" y="70px" width="15px" height="15px"
+        style="fill: rgb(95, 100, 105)">
+  </rect>
+  <rect x="20px" y="120px" width="15px" height="15px"
+        style="fill: rgb(104, 106, 108)">
+  </rect>
+  <rect x="70px" y="120px" width="15px" height="15px"
+        style="fill: rgb(140, 130, 120)">
+  </rect>
+  <rect x="120px" y="120px" width="15px" height="15px"
+        style="fill: rgb(140, 130, 120)">
+  </rect>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fill-3-by-ident-ident.svg b/layout/reftests/svg/smil/style/anim-css-fill-3-by-ident-ident.svg
new file mode 100644
index 0000000000..16fbbc062d
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fill-3-by-ident-ident.svg
@@ -0,0 +1,19 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <!-- This is a test with a named color (DarkSlateGray == rgb(47, 79, 79)) -->
+  <!-- being added to another color (DarkOliveGreen == rbg(85, 107, 47)).   -->
+  <style>
+    rect { fill: DarkOliveGreen; stroke: Black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "fill",
+                           "by"            : "DarkSlateGray" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fill-3-from-by-ident-ident.svg b/layout/reftests/svg/smil/style/anim-css-fill-3-from-by-ident-ident.svg
new file mode 100644
index 0000000000..a2bdf8e8fc
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fill-3-from-by-ident-ident.svg
@@ -0,0 +1,20 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <!-- This is a test with a named color (DarkSlateGray == rgb(47, 79, 79)) -->
+  <!-- being added to another color (DarkOliveGreen == rbg(85, 107, 47)).   -->
+  <style>
+    rect { fill: DarkOliveGreen; stroke: Black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "fill",
+                           "from"          : "DarkOliveGreen",
+                           "by"            : "DarkSlateGray" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fill-3-from-by-rgb-ident.svg b/layout/reftests/svg/smil/style/anim-css-fill-3-from-by-rgb-ident.svg
new file mode 100644
index 0000000000..b2b8b689ea
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fill-3-from-by-rgb-ident.svg
@@ -0,0 +1,20 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <!-- This is a test with a named color (DarkSlateGray == rgb(47, 79, 79)) -->
+  <!-- being added to another color (DarkOliveGreen == rbg(85, 107, 47)).   -->
+  <style>
+    rect { fill: DarkOliveGreen; stroke: Black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "fill",
+                           "from"          : "rgb(85, 107, 47)",
+                           "by"            : "DarkSlateGray" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fill-3-ref.svg b/layout/reftests/svg/smil/style/anim-css-fill-3-ref.svg
new file mode 100644
index 0000000000..8a14da61ea
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fill-3-ref.svg
@@ -0,0 +1,32 @@
+<svg xmlns="http://www.w3.org/2000/svg">
+  <style>
+    rect { stroke: black; }
+  </style>
+  <rect x="20px" y="20px" width="15px" height="15px"
+        style="fill: rgb(85, 107, 47)">
+  </rect>
+  <rect x="70px" y="20px" width="15px" height="15px"
+        style="fill: rgb(85, 107, 47)">
+  </rect>
+  <rect x="120px" y="20px" width="15px" height="15px"
+        style="fill: rgb(92, 119, 59)">
+  </rect>
+  <rect x="20px" y="70px" width="15px" height="15px"
+        style="fill: rgb(103, 137, 77)">
+  </rect>
+  <rect x="70px" y="70px" width="15px" height="15px"
+        style="fill: rgb(108, 146, 86)">
+  </rect>
+  <rect x="120px" y="70px" width="15px" height="15px"
+        style="fill: rgb(120, 166, 106)">
+  </rect>
+  <rect x="20px" y="120px" width="15px" height="15px"
+        style="fill: rgb(123, 170, 110)">
+  </rect>
+  <rect x="70px" y="120px" width="15px" height="15px"
+        style="fill: rgb(132, 186, 126)">
+  </rect>
+  <rect x="120px" y="120px" width="15px" height="15px"
+        style="fill: rgb(132, 186, 126)">
+  </rect>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fill-overflow-1-by.svg b/layout/reftests/svg/smil/style/anim-css-fill-overflow-1-by.svg
new file mode 100644
index 0000000000..d65f963b33
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fill-overflow-1-by.svg
@@ -0,0 +1,20 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <!-- This is a series of snapshots of a color animation, starting at  -->
+  <!-- YellowGreen (#9ACD32 == rgb(154,205,50)) and increasing each     -->
+  <!-- channel beyond its maximum. (which should clamp it to 255)       -->
+  <style>
+    rect { fill: yellowgreen; stroke: black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "fill",
+                           "by"            : "rgb(200, 100, 250)" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fill-overflow-1-from-by.svg b/layout/reftests/svg/smil/style/anim-css-fill-overflow-1-from-by.svg
new file mode 100644
index 0000000000..df06aea2de
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fill-overflow-1-from-by.svg
@@ -0,0 +1,21 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <!-- This is a series of snapshots of a color animation, starting at  -->
+  <!-- YellowGreen (#9ACD32 == rgb(154,205,50)) and increasing each     -->
+  <!-- channel beyond its maximum. (which should clamp it to 255)       -->
+  <style>
+    rect { fill: yellowgreen; stroke: black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "fill",
+                           "from"          : "yellowgreen",
+                           "by"            : "rgb(200, 100, 250)" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fill-overflow-1-ref.svg b/layout/reftests/svg/smil/style/anim-css-fill-overflow-1-ref.svg
new file mode 100644
index 0000000000..917bfef9f5
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fill-overflow-1-ref.svg
@@ -0,0 +1,32 @@
+<svg xmlns="http://www.w3.org/2000/svg">
+  <style>
+    rect { stroke: black; }
+  </style>
+  <rect x="20px" y="20px" width="15px" height="15px"
+        style="fill: yellowgreen">
+  </rect>
+  <rect x="70px" y="20px" width="15px" height="15px"
+        style="fill: yellowgreen">
+  </rect>
+  <rect x="120px" y="20px" width="15px" height="15px"
+        style="fill: rgb(184, 220, 88)">
+  </rect>
+  <rect x="20px" y="70px" width="15px" height="15px"
+        style="fill: rgb(229, 243, 144)">
+  </rect>
+  <rect x="70px" y="70px" width="15px" height="15px"
+        style="fill: rgb(253, 255, 174)">
+  </rect>
+  <rect x="120px" y="70px" width="15px" height="15px"
+        style="fill: rgb(255, 255, 238)">
+  </rect>
+  <rect x="20px" y="120px" width="15px" height="15px"
+        style="fill: rgb(255, 255, 250)">
+  </rect>
+  <rect x="70px" y="120px" width="15px" height="15px"
+        style="fill: rgb(255, 255, 255)">
+  </rect>
+  <rect x="120px" y="120px" width="15px" height="15px"
+        style="fill: rgb(255, 255, 255)">
+  </rect>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fillopacity-1-by.svg b/layout/reftests/svg/smil/style/anim-css-fillopacity-1-by.svg
new file mode 100644
index 0000000000..fc3f4b042e
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fillopacity-1-by.svg
@@ -0,0 +1,17 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { fill: blue; stroke: black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "fill-opacity",
+                           "by"            : "-1" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fillopacity-1-from-by.svg b/layout/reftests/svg/smil/style/anim-css-fillopacity-1-from-by.svg
new file mode 100644
index 0000000000..39e03b8db2
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fillopacity-1-from-by.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { fill: blue; stroke: black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "fill-opacity",
+                           "from"          : "1",
+                           "by"            : "-1" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fillopacity-1-from-to.svg b/layout/reftests/svg/smil/style/anim-css-fillopacity-1-from-to.svg
new file mode 100644
index 0000000000..2ec29db9b2
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fillopacity-1-from-to.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { fill: blue; stroke: black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "fill-opacity",
+                           "from"          : "1",
+                           "to"            : "0" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fillopacity-1-ref.svg b/layout/reftests/svg/smil/style/anim-css-fillopacity-1-ref.svg
new file mode 100644
index 0000000000..f35de241c1
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fillopacity-1-ref.svg
@@ -0,0 +1,32 @@
+<svg xmlns="http://www.w3.org/2000/svg">
+  <style>
+    rect { fill: blue; stroke: black; }
+  </style>
+  <rect x="20px" y="20px" width="15px" height="15px"
+        style="fill-opacity: 1">
+  </rect>
+  <rect x="70px" y="20px" width="15px" height="15px"
+        style="fill-opacity: 1">
+  </rect>
+  <rect x="120px" y="20px" width="15px" height="15px"
+        style="fill-opacity: 0.85">
+  </rect>
+  <rect x="20px" y="70px" width="15px" height="15px"
+        style="fill-opacity: 0.625">
+  </rect>
+  <rect x="70px" y="70px" width="15px" height="15px"
+        style="fill-opacity: 0.505">
+  </rect>
+  <rect x="120px" y="70px" width="15px" height="15px"
+        style="fill-opacity: 0.25">
+  </rect>
+  <rect x="20px" y="120px" width="15px" height="15px"
+        style="fill-opacity: 0.2">
+  </rect>
+  <rect x="70px" y="120px" width="15px" height="15px"
+        style="fill-opacity: 0.0">
+  </rect>
+  <rect x="120px" y="120px" width="15px" height="15px"
+        style="fill-opacity: 0.0">
+  </rect>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fillopacity-1-to.svg b/layout/reftests/svg/smil/style/anim-css-fillopacity-1-to.svg
new file mode 100644
index 0000000000..110cbd6d82
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fillopacity-1-to.svg
@@ -0,0 +1,17 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { fill: blue; stroke: black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "fill-opacity",
+                           "to"            : "0" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fillopacity-2-paced.svg b/layout/reftests/svg/smil/style/anim-css-fillopacity-2-paced.svg
new file mode 100644
index 0000000000..61ac49a8d1
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fillopacity-2-paced.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { fill: blue; stroke: black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "fill-opacity",
+                           "calcMode"      : "paced",
+                           "values"        : "0.6;0.1;0.95;0.3" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fillopacity-2-ref.svg b/layout/reftests/svg/smil/style/anim-css-fillopacity-2-ref.svg
new file mode 100644
index 0000000000..c30942bcf6
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fillopacity-2-ref.svg
@@ -0,0 +1,32 @@
+<svg xmlns="http://www.w3.org/2000/svg">
+  <style>
+    rect { fill: blue; stroke: black; }
+  </style>
+  <rect x="20px" y="20px" width="15px" height="15px"
+        style="fill-opacity: 1">
+  </rect>
+  <rect x="70px" y="20px" width="15px" height="15px"
+        style="fill-opacity: 0.6">
+  </rect>
+  <rect x="120px" y="20px" width="15px" height="15px"
+        style="fill-opacity: 0.3">
+  </rect>
+  <rect x="20px" y="70px" width="15px" height="15px"
+        style="fill-opacity: 0.35">
+  </rect>
+  <rect x="70px" y="70px" width="15px" height="15px"
+        style="fill-opacity: 0.59">
+  </rect>
+  <rect x="120px" y="70px" width="15px" height="15px"
+        style="fill-opacity: 0.8">
+  </rect>
+  <rect x="20px" y="120px" width="15px" height="15px"
+        style="fill-opacity: 0.7">
+  </rect>
+  <rect x="70px" y="120px" width="15px" height="15px"
+        style="fill-opacity: 0.3">
+  </rect>
+  <rect x="120px" y="120px" width="15px" height="15px"
+        style="fill-opacity: 0.3">
+  </rect>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fillopacity-3-clamp-big.svg b/layout/reftests/svg/smil/style/anim-css-fillopacity-3-clamp-big.svg
new file mode 100644
index 0000000000..0faec1156b
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fillopacity-3-clamp-big.svg
@@ -0,0 +1,27 @@
+<!--
+   This testcase checks that we don't clamp negative opacity values to their
+   valid range [0,1] until *after* we've done animation & interpolation.
+   If we clamped intermediate results too early (e.g. after parsing, during
+   interpolation, or right after we add the first animation's interpolated
+   value), we'd end up with the wrong intermediate opacity values here.
+ -->
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { fill: blue; stroke: black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHashA = { "attributeName" : "fill-opacity",
+                            "from"          : "-0.4",
+                            "by"            : "1.2" };
+      var animAttrHashB = { "attributeName" : "fill-opacity",
+                            "by"            : "0.2" };
+      testAnimatedRectGrid("animate", [animAttrHashA, animAttrHashB]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fillopacity-3-clamp-small.svg b/layout/reftests/svg/smil/style/anim-css-fillopacity-3-clamp-small.svg
new file mode 100644
index 0000000000..d7ff87e20a
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fillopacity-3-clamp-small.svg
@@ -0,0 +1,27 @@
+<!--
+   This testcase checks that we don't clamp negative opacity values to their
+   valid range [0,1] until *after* we've done animation & interpolation.
+   If we clamped intermediate results too early (e.g. after parsing, during
+   interpolation, or right after we add the first animation's interpolated
+   value), we'd end up with the wrong intermediate opacity values here.
+ -->
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { fill: blue; stroke: black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHashA = { "attributeName" : "fill-opacity",
+                            "from"          : "-0.4",
+                            "by"            : "0.6" };
+      var animAttrHashB = { "attributeName" : "fill-opacity",
+                            "by"            : "0.4" };
+      testAnimatedRectGrid("animate", [animAttrHashA, animAttrHashB]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fillopacity-3-ref.svg b/layout/reftests/svg/smil/style/anim-css-fillopacity-3-ref.svg
new file mode 100644
index 0000000000..bc089e43c4
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fillopacity-3-ref.svg
@@ -0,0 +1,32 @@
+<svg xmlns="http://www.w3.org/2000/svg">
+  <style>
+    rect { fill: blue; stroke: black; }
+  </style>
+  <rect x="20px" y="20px" width="15px" height="15px"
+        style="fill-opacity: 1">
+  </rect>
+  <rect x="70px" y="20px" width="15px" height="15px"
+        style="fill-opacity: 0">
+  </rect>
+  <rect x="120px" y="20px" width="15px" height="15px"
+        style="fill-opacity: 0">
+  </rect>
+  <rect x="20px" y="70px" width="15px" height="15px"
+        style="fill-opacity: 0">
+  </rect>
+  <rect x="70px" y="70px" width="15px" height="15px"
+        style="fill-opacity: 0.095">
+  </rect>
+  <rect x="120px" y="70px" width="15px" height="15px"
+        style="fill-opacity: 0.35">
+  </rect>
+  <rect x="20px" y="120px" width="15px" height="15px"
+        style="fill-opacity: 0.4">
+  </rect>
+  <rect x="70px" y="120px" width="15px" height="15px"
+        style="fill-opacity: 0.6">
+  </rect>
+  <rect x="120px" y="120px" width="15px" height="15px"
+        style="fill-opacity: 0.6">
+  </rect>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-floodcolor-overflow-1-from-by.svg b/layout/reftests/svg/smil/style/anim-css-floodcolor-overflow-1-from-by.svg
new file mode 100644
index 0000000000..1def47fafd
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-floodcolor-overflow-1-from-by.svg
@@ -0,0 +1,26 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <!-- This is a series of snapshots of a color animation, starting at  -->
+  <!-- YellowGreen (#9ACD32 == rgb(154,205,50)) and increasing each     -->
+  <!-- channel beyond its maximum. (which should clamp it to 255)       -->
+  <style>
+    feFlood { flood-color: yellowgreen; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "flood-color",
+                           "from"          : "yellowgreen",
+                           "by"            : "rgb(200, 100, 250)" };
+      var graphicElemTag = "rect";
+      var graphicElemAttrHash = { "width"  : "15px",
+                                  "height" : "15px" };
+      testAnimatedGridWithDefs(graphicElemTag, graphicElemAttrHash, "filter",
+                               [ "filter", "feFlood" ],
+                               "animate", [ animAttrHash ]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-floodcolor-overflow-1-ref.svg b/layout/reftests/svg/smil/style/anim-css-floodcolor-overflow-1-ref.svg
new file mode 100644
index 0000000000..27d0bcd56e
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-floodcolor-overflow-1-ref.svg
@@ -0,0 +1,40 @@
+<svg xmlns="http://www.w3.org/2000/svg">
+  <defs>
+    <filter id="f0"><feFlood flood-color="yellowgreen" /></filter>
+    <filter id="f1"><feFlood flood-color="yellowgreen" /></filter>
+    <filter id="f2"><feFlood flood-color="rgb(184, 220, 88)" /></filter>
+    <filter id="f3"><feFlood flood-color="rgb(229, 243, 144)" /></filter>
+    <filter id="f4"><feFlood flood-color="rgb(253, 255, 174)" /></filter>
+    <filter id="f5"><feFlood flood-color="rgb(255, 255, 238)" /></filter>
+    <filter id="f6"><feFlood flood-color="rgb(255, 255, 250)" /></filter>
+    <filter id="f7"><feFlood flood-color="rgb(255, 255, 255)" /></filter>
+    <filter id="f8"><feFlood flood-color="rgb(255, 255, 255)" /></filter>
+  </defs>
+  <rect x="20px" y="20px" width="15px" height="15px"
+        style="filter:url(#f0)">
+  </rect>
+  <rect x="70px" y="20px" width="15px" height="15px"
+        style="filter:url(#f1)">
+  </rect>
+  <rect x="120px" y="20px" width="15px" height="15px"
+        style="filter:url(#f2)">
+  </rect>
+  <rect x="20px" y="70px" width="15px" height="15px"
+        style="filter:url(#f3)">
+  </rect>
+  <rect x="70px" y="70px" width="15px" height="15px"
+        style="filter:url(#f4)">
+  </rect>
+  <rect x="120px" y="70px" width="15px" height="15px"
+        style="filter:url(#f5)">
+  </rect>
+  <rect x="20px" y="120px" width="15px" height="15px"
+        style="filter:url(#f6)">
+  </rect>
+  <rect x="70px" y="120px" width="15px" height="15px"
+        style="filter:url(#f7)">
+  </rect>
+  <rect x="120px" y="120px" width="15px" height="15px"
+        style="filter:url(#f8)">
+  </rect>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-font-1-ref.svg b/layout/reftests/svg/smil/style/anim-css-font-1-ref.svg
new file mode 100644
index 0000000000..de028ec6be
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-font-1-ref.svg
@@ -0,0 +1,76 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     width="300px" height="400px">
+
+  <!-- 'inherit' to 'caption' -->
+  <text x="0px"   y="50px" style="font: inherit">abc
+  </text>
+  <text x="50px"  y="50px" style="font: inherit">abc
+  </text>
+  <text x="100px" y="50px" style="font: inherit">abc
+  </text>
+  <text x="150px" y="50px" style="font: caption">abc
+  </text>
+  <text x="200px" y="50px" style="font: caption">abc
+  </text>
+
+  <!-- 'caption' to 'inherit' -->
+  <text x="0px"   y="100px" style="font: inherit">abc
+  </text>
+  <text x="50px"  y="100px" style="font: caption">abc
+  </text>
+  <text x="100px" y="100px" style="font: caption">abc
+  </text>
+  <text x="150px" y="100px" style="font: inherit">abc
+  </text>
+  <text x="200px" y="100px" style="font: inherit">abc
+  </text>
+
+  <!-- 'caption' to 'icon' -->
+  <text x="0px"   y="150px" style="font: inherit">abc
+  </text>
+  <text x="50px"  y="150px" style="font: caption">abc
+  </text>
+  <text x="100px" y="150px" style="font: caption">abc
+  </text>
+  <text x="150px" y="150px" style="font: icon">abc
+  </text>
+  <text x="200px" y="150px" style="font: icon">abc
+  </text>
+
+  <!-- 'caption' to 'menu' -->
+  <text x="0px"   y="200px" style="font: inherit">abc
+  </text>
+  <text x="50px"  y="200px" style="font: caption">abc
+  </text>
+  <text x="100px" y="200px" style="font: caption">abc
+  </text>
+  <text x="150px" y="200px" style="font: menu">abc
+  </text>
+  <text x="200px" y="200px" style="font: menu">abc
+  </text>
+
+  <!-- 'caption' to 'message-box' -->
+  <text x="0px"   y="250px" style="font: inherit">abc
+  </text>
+  <text x="50px"  y="250px" style="font: caption">abc
+  </text>
+  <text x="100px" y="250px" style="font: caption">abc
+  </text>
+  <text x="150px" y="250px" style="font: message-box">abc
+  </text>
+  <text x="200px" y="250px" style="font: message-box">abc
+  </text>
+
+  <!-- 'caption' to 'small-caption' -->
+  <text x="0px"   y="300px" style="font: inherit">abc
+  </text>
+  <text x="50px"  y="300px" style="font: caption">abc
+  </text>
+  <text x="100px" y="300px" style="font: caption">abc
+  </text>
+  <text x="150px" y="300px" style="font: small-caption">abc
+  </text>
+  <text x="200px" y="300px" style="font: small-caption">abc
+  </text>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-font-1.svg b/layout/reftests/svg/smil/style/anim-css-font-1.svg
new file mode 100644
index 0000000000..0cd69258fd
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-font-1.svg
@@ -0,0 +1,144 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     width="300px" height="400px"
+     class="reftest-wait"
+     onload="go()">
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      requestAnimationFrame(() => { setTimeAndSnapshot(3.0, true) });
+    }
+  </script>
+
+  <!-- 'inherit' to 'caption' -->
+  <text x="0px"   y="50px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="inherit" to="caption" begin="4.0s" dur="2s"/>
+  </text>
+  <text x="50px"  y="50px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="inherit" to="caption" begin="3.0s" dur="2s"/>
+  </text>
+  <text x="100px" y="50px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="inherit" to="caption" begin="2.01s" dur="2s"/>
+  </text>
+  <text x="150px" y="50px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="inherit" to="caption" begin="2.0s" dur="2s"/>
+  </text>
+  <text x="200px" y="50px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="inherit" to="caption" begin="1.0s" dur="2s"/>
+  </text>
+
+  <!-- 'caption' to 'inherit' -->
+  <text x="0px"   y="100px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="caption" to="inherit" begin="4.0s" dur="2s"/>
+  </text>
+  <text x="50px"  y="100px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="caption" to="inherit" begin="3.0s" dur="2s"/>
+  </text>
+  <text x="100px" y="100px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="caption" to="inherit" begin="2.01s" dur="2s"/>
+  </text>
+  <text x="150px" y="100px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="caption" to="inherit" begin="2.0s" dur="2s"/>
+  </text>
+  <text x="200px" y="100px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="caption" to="inherit" begin="1.0s" dur="2s"/>
+  </text>
+
+  <!-- 'caption' to 'icon' -->
+  <text x="0px"   y="150px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="caption" to="icon" begin="4.0s" dur="2s"/>
+  </text>
+  <text x="50px"  y="150px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="caption" to="icon" begin="3.0s" dur="2s"/>
+  </text>
+  <text x="100px" y="150px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="caption" to="icon" begin="2.01s" dur="2s"/>
+  </text>
+  <text x="150px" y="150px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="caption" to="icon" begin="2.0s" dur="2s"/>
+  </text>
+  <text x="200px" y="150px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="caption" to="icon" begin="1.0s" dur="2s"/>
+  </text>
+
+  <!-- 'caption' to 'menu' -->
+  <text x="0px"   y="200px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="caption" to="menu" begin="4.0s" dur="2s"/>
+  </text>
+  <text x="50px"  y="200px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="caption" to="menu" begin="3.0s" dur="2s"/>
+  </text>
+  <text x="100px" y="200px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="caption" to="menu" begin="2.01s" dur="2s"/>
+  </text>
+  <text x="150px" y="200px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="caption" to="menu" begin="2.0s" dur="2s"/>
+  </text>
+  <text x="200px" y="200px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="caption" to="menu" begin="1.0s" dur="2s"/>
+  </text>
+
+  <!-- 'caption' to 'message-box' -->
+  <text x="0px"   y="250px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="caption" to="message-box" begin="4.0s" dur="2s"/>
+  </text>
+  <text x="50px"  y="250px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="caption" to="message-box" begin="3.0s" dur="2s"/>
+  </text>
+  <text x="100px" y="250px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="caption" to="message-box" begin="2.01s" dur="2s"/>
+  </text>
+  <text x="150px" y="250px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="caption" to="message-box" begin="2.0s" dur="2s"/>
+  </text>
+  <text x="200px" y="250px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="caption" to="message-box" begin="1.0s" dur="2s"/>
+  </text>
+
+  <!-- 'caption' to 'small-caption' -->
+  <text x="0px"   y="300px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="caption" to="small-caption" begin="4.0s" dur="2s"/>
+  </text>
+  <text x="50px"  y="300px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="caption" to="small-caption" begin="3.0s" dur="2s"/>
+  </text>
+  <text x="100px" y="300px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="caption" to="small-caption" begin="2.01s" dur="2s"/>
+  </text>
+  <text x="150px" y="300px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="caption" to="small-caption" begin="2.0s" dur="2s"/>
+  </text>
+  <text x="200px" y="300px">abc
+    <animate attributeName="font" attributeType="CSS" fill="freeze"
+             from="caption" to="small-caption" begin="1.0s" dur="2s"/>
+  </text>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-by-pct-pct.svg b/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-by-pct-pct.svg
new file mode 100644
index 0000000000..38afe61f07
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-by-pct-pct.svg
@@ -0,0 +1,16 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "font-size",
+                           "from"          : "500%",
+                           "by"            : "1000%" };
+      testAnimatedTextGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-by-pct-px.svg b/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-by-pct-px.svg
new file mode 100644
index 0000000000..ea4d7c3e8c
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-by-pct-px.svg
@@ -0,0 +1,16 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "font-size",
+                           "from"          : "500%",
+                           "by"            : "20px" };
+      testAnimatedTextGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-by-px-pct.svg b/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-by-px-pct.svg
new file mode 100644
index 0000000000..8e4b6d5866
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-by-px-pct.svg
@@ -0,0 +1,16 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "font-size",
+                           "from"          : "10px",
+                           "by"            : "1000%" };
+      testAnimatedTextGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-by-px-px.svg b/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-by-px-px.svg
new file mode 100644
index 0000000000..637c49e318
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-by-px-px.svg
@@ -0,0 +1,16 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "font-size",
+                           "from"          : "10px",
+                           "by"            : "20px" };
+      testAnimatedTextGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-to-no-no.svg b/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-to-no-no.svg
new file mode 100644
index 0000000000..2b4e18030e
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-to-no-no.svg
@@ -0,0 +1,17 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "font-size",
+                           "attributeType" : "CSS",
+                           "from"          : "10",
+                           "to"            : "30" };
+      testAnimatedTextGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-to-no-px.svg b/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-to-no-px.svg
new file mode 100644
index 0000000000..7ced25e9af
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-to-no-px.svg
@@ -0,0 +1,17 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "font-size",
+                           "attributeType" : "CSS",
+                           "from"          : "10",
+                           "to"            : "30px" };
+      testAnimatedTextGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-to-pct-pct.svg b/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-to-pct-pct.svg
new file mode 100644
index 0000000000..0cf6c0cf36
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-to-pct-pct.svg
@@ -0,0 +1,16 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "font-size",
+                           "from"          : "500%",
+                           "to"            : "1500%" };
+      testAnimatedTextGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-to-pct-px.svg b/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-to-pct-px.svg
new file mode 100644
index 0000000000..fc4ff3afd1
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-to-pct-px.svg
@@ -0,0 +1,16 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "font-size",
+                           "from"          : "500%",
+                           "to"            : "30px" };
+      testAnimatedTextGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-to-px-no.svg b/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-to-px-no.svg
new file mode 100644
index 0000000000..56e51eeab7
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-to-px-no.svg
@@ -0,0 +1,17 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "font-size",
+                           "attributeType" : "CSS",
+                           "from"          : "10px",
+                           "to"            : "30" };
+      testAnimatedTextGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-to-px-pct.svg b/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-to-px-pct.svg
new file mode 100644
index 0000000000..94c195c2f3
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-to-px-pct.svg
@@ -0,0 +1,16 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "font-size",
+                           "from"          : "10px",
+                           "to"            : "1500%" };
+      testAnimatedTextGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-to-px-px.svg b/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-to-px-px.svg
new file mode 100644
index 0000000000..7158f64644
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fontsize-1-from-to-px-px.svg
@@ -0,0 +1,16 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "font-size",
+                           "from"          : "10px",
+                           "to"            : "30px" };
+      testAnimatedTextGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fontsize-1-ref.svg b/layout/reftests/svg/smil/style/anim-css-fontsize-1-ref.svg
new file mode 100644
index 0000000000..4747c2824c
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fontsize-1-ref.svg
@@ -0,0 +1,20 @@
+<svg xmlns="http://www.w3.org/2000/svg">
+  <text x="20px" y="20px" style="font-size: 2px">abc
+  </text>
+  <text x="70px" y="20px" style="font-size: 10px">abc
+  </text>
+  <text x="120px" y="20px" style="font-size: 13px">abc
+  </text>
+  <text x="20px" y="70px" style="font-size: 17.5px">abc
+  </text>
+  <text x="70px" y="70px" style="font-size: 19.9px">abc
+  </text>
+  <text x="120px" y="70px" style="font-size: 25px">abc
+  </text>
+  <text x="20px" y="120px" style="font-size: 26px">abc
+  </text>
+  <text x="70px" y="120px" style="font-size: 30px">abc
+  </text>
+  <text x="120px" y="120px" style="font-size: 30px">abc
+  </text>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fontsize-2-from-by-em-em.svg b/layout/reftests/svg/smil/style/anim-css-fontsize-2-from-by-em-em.svg
new file mode 100644
index 0000000000..3fe3ae0ce9
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fontsize-2-from-by-em-em.svg
@@ -0,0 +1,16 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "font-size",
+                           "from"          : "15em",
+                           "by"            : "-10em" };
+      testAnimatedTextGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fontsize-2-from-by-px-em.svg b/layout/reftests/svg/smil/style/anim-css-fontsize-2-from-by-px-em.svg
new file mode 100644
index 0000000000..44b407e185
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fontsize-2-from-by-px-em.svg
@@ -0,0 +1,16 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "font-size",
+                           "from"          : "30px",
+                           "by"            : "-10em" };
+      testAnimatedTextGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fontsize-2-from-by-px-px.svg b/layout/reftests/svg/smil/style/anim-css-fontsize-2-from-by-px-px.svg
new file mode 100644
index 0000000000..70199be78b
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fontsize-2-from-by-px-px.svg
@@ -0,0 +1,16 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "font-size",
+                           "from"          : "30px",
+                           "by"            : "-20px" };
+      testAnimatedTextGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-fontsize-2-ref.svg b/layout/reftests/svg/smil/style/anim-css-fontsize-2-ref.svg
new file mode 100644
index 0000000000..6edb8deff6
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-fontsize-2-ref.svg
@@ -0,0 +1,20 @@
+<svg xmlns="http://www.w3.org/2000/svg">
+  <text x="20px" y="20px" style="font-size: 2px">abc
+  </text>
+  <text x="70px" y="20px" style="font-size: 30px">abc
+  </text>
+  <text x="120px" y="20px" style="font-size: 27px">abc
+  </text>
+  <text x="20px" y="70px" style="font-size: 22.5px">abc
+  </text>
+  <text x="70px" y="70px" style="font-size: 20.1px">abc
+  </text>
+  <text x="120px" y="70px" style="font-size: 15px">abc
+  </text>
+  <text x="20px" y="120px" style="font-size: 14px">abc
+  </text>
+  <text x="70px" y="120px" style="font-size: 10px">abc
+  </text>
+  <text x="120px" y="120px" style="font-size: 10px">abc
+  </text>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-letterspacing-1-ref.svg b/layout/reftests/svg/smil/style/anim-css-letterspacing-1-ref.svg
new file mode 100644
index 0000000000..b56522931c
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-letterspacing-1-ref.svg
@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg">
+  <text x="50" y="50" font-size="20" letter-spacing="15">abc</text>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-letterspacing-1.svg b/layout/reftests/svg/smil/style/anim-css-letterspacing-1.svg
new file mode 100644
index 0000000000..e10d430cf0
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-letterspacing-1.svg
@@ -0,0 +1,8 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait" onload="setTimeAndSnapshot(3.0, true)">
+  <script xlink:href="../smil-util.js"/>
+  <text x="50" y="50" font-size="20">abc
+    <animate attributeName="letter-spacing" fill="freeze" from="0" to="20" begin="0s" dur="4s"/>
+  </text>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-stopcolor-overflow-1-from-by.svg b/layout/reftests/svg/smil/style/anim-css-stopcolor-overflow-1-from-by.svg
new file mode 100644
index 0000000000..da3ace6784
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-stopcolor-overflow-1-from-by.svg
@@ -0,0 +1,27 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <!-- This is a series of snapshots of a color animation, starting at  -->
+  <!-- YellowGreen (#9ACD32 == rgb(154,205,50)) and increasing each     -->
+  <!-- channel beyond its maximum. (which should clamp it to 255)       -->
+  <style>
+    stop { stop-color: yellowgreen; }
+    rect { stroke: black; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stop-color",
+                           "from"          : "yellowgreen",
+                           "by"            : "rgb(200, 100, 250)" };
+      var graphicElemTag = "rect";
+      var graphicElemAttrHash = { "width"  : "15px",
+                                  "height" : "15px" };
+      testAnimatedGridWithDefs(graphicElemTag, graphicElemAttrHash, "fill",
+                               [ "linearGradient", "stop" ],
+                               "animate", [ animAttrHash ]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-stopcolor-overflow-1-ref.svg b/layout/reftests/svg/smil/style/anim-css-stopcolor-overflow-1-ref.svg
new file mode 100644
index 0000000000..917bfef9f5
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-stopcolor-overflow-1-ref.svg
@@ -0,0 +1,32 @@
+<svg xmlns="http://www.w3.org/2000/svg">
+  <style>
+    rect { stroke: black; }
+  </style>
+  <rect x="20px" y="20px" width="15px" height="15px"
+        style="fill: yellowgreen">
+  </rect>
+  <rect x="70px" y="20px" width="15px" height="15px"
+        style="fill: yellowgreen">
+  </rect>
+  <rect x="120px" y="20px" width="15px" height="15px"
+        style="fill: rgb(184, 220, 88)">
+  </rect>
+  <rect x="20px" y="70px" width="15px" height="15px"
+        style="fill: rgb(229, 243, 144)">
+  </rect>
+  <rect x="70px" y="70px" width="15px" height="15px"
+        style="fill: rgb(253, 255, 174)">
+  </rect>
+  <rect x="120px" y="70px" width="15px" height="15px"
+        style="fill: rgb(255, 255, 238)">
+  </rect>
+  <rect x="20px" y="120px" width="15px" height="15px"
+        style="fill: rgb(255, 255, 250)">
+  </rect>
+  <rect x="70px" y="120px" width="15px" height="15px"
+        style="fill: rgb(255, 255, 255)">
+  </rect>
+  <rect x="120px" y="120px" width="15px" height="15px"
+        style="fill: rgb(255, 255, 255)">
+  </rect>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokedasharray-1-ref.svg b/layout/reftests/svg/smil/style/anim-css-strokedasharray-1-ref.svg
new file mode 100644
index 0000000000..d2cfe9b4bb
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokedasharray-1-ref.svg
@@ -0,0 +1,32 @@
+<svg xmlns="http://www.w3.org/2000/svg">
+  <style>
+    rect { stroke: blue; stroke-width: 5px; }
+  </style>
+  <rect x="20px" y="20px" width="15px" height="15px"
+        style="stroke-dasharray: 20px, 5px">
+  </rect>
+  <rect x="70px" y="20px" width="15px" height="15px"
+        style="stroke-dasharray: 20px, 5px">
+  </rect>
+  <rect x="120px" y="20px" width="15px" height="15px"
+        style="stroke-dasharray: 18.5px, 6.5px">
+  </rect>
+  <rect x="20px" y="70px" width="15px" height="15px"
+        style="stroke-dasharray: 16.25px, 8.75px">
+  </rect>
+  <rect x="70px" y="70px" width="15px" height="15px"
+        style="stroke-dasharray: 15.05px, 9.95px">
+  </rect>
+  <rect x="120px" y="70px" width="15px" height="15px"
+        style="stroke-dasharray: 12.5px, 12.5px">
+  </rect>
+  <rect x="20px" y="120px" width="15px" height="15px"
+        style="stroke-dasharray: 12px, 13px">
+  </rect>
+  <rect x="70px" y="120px" width="15px" height="15px"
+        style="stroke-dasharray: 10px, 15px">
+  </rect>
+  <rect x="120px" y="120px" width="15px" height="15px"
+        style="stroke-dasharray: 10px, 15px">
+  </rect>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokedasharray-1.svg b/layout/reftests/svg/smil/style/anim-css-strokedasharray-1.svg
new file mode 100644
index 0000000000..9488f6546e
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokedasharray-1.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 5px; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-dasharray",
+                           "from"          : "20px, 5px",
+                           "to"            : "10px, 15px" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-by-em-em.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-by-em-em.svg
new file mode 100644
index 0000000000..1472123ee7
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-by-em-em.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 5em; shape-rendering: crispEdges; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "by"            : "10em" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-by-em-px.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-by-em-px.svg
new file mode 100644
index 0000000000..2b6a983f2d
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-by-em-px.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 5em; shape-rendering: crispEdges; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "by"            : "20px" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-by-no-no.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-by-no-no.svg
new file mode 100644
index 0000000000..0ae489d628
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-by-no-no.svg
@@ -0,0 +1,17 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 10; shape-rendering: crispEdges; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "by"            : "20" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-by-pct-pct.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-by-pct-pct.svg
new file mode 100644
index 0000000000..e9e1cc2d6e
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-by-pct-pct.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     width="200px" height="200px"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 5%; shape-rendering: crispEdges; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "by"            : "10%" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-by-pct-px.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-by-pct-px.svg
new file mode 100644
index 0000000000..3199059764
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-by-pct-px.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     width="200px" height="200px"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 5%; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "by"            : "20px" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-by-px-em.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-by-px-em.svg
new file mode 100644
index 0000000000..f1a918ea75
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-by-px-em.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 10px; shape-rendering: crispEdges; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "by"            : "10em" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-by-px-pct.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-by-px-pct.svg
new file mode 100644
index 0000000000..076e49adf4
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-by-px-pct.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     width="200px" height="200px"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 10px; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "by"            : "10%" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-by-px-px.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-by-px-px.svg
new file mode 100644
index 0000000000..65d3bbc6e9
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-by-px-px.svg
@@ -0,0 +1,17 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 10px; shape-rendering: crispEdges; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "by"            : "20px" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-by-em-em.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-by-em-em.svg
new file mode 100644
index 0000000000..2058d83661
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-by-em-em.svg
@@ -0,0 +1,19 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 10px; shape-rendering: crispEdges; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "from"          : "5em",
+                           "by"            : "10em" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-by-em-px.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-by-em-px.svg
new file mode 100644
index 0000000000..e37bc12cf3
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-by-em-px.svg
@@ -0,0 +1,19 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 10px; shape-rendering: crispEdges; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "from"          : "5em",
+                           "by"            : "20px" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-by-no-no.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-by-no-no.svg
new file mode 100644
index 0000000000..0c1afad42b
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-by-no-no.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 10px; shape-rendering: crispEdges; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "from"          : "10",
+                           "by"            : "20" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-by-pct-pct.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-by-pct-pct.svg
new file mode 100644
index 0000000000..76e5c1e520
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-by-pct-pct.svg
@@ -0,0 +1,19 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     width="200px" height="200px"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 5%; shape-rendering: crispEdges; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "from"          : "5%",
+                           "by"            : "10%" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-by-pct-px.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-by-pct-px.svg
new file mode 100644
index 0000000000..3394572e76
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-by-pct-px.svg
@@ -0,0 +1,19 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     width="200px" height="200px"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 5%; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "from"          : "5%",
+                           "by"            : "20px" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-by-px-em.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-by-px-em.svg
new file mode 100644
index 0000000000..3e26f8973a
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-by-px-em.svg
@@ -0,0 +1,19 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 10px; shape-rendering: crispEdges; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "from"          : "10px",
+                           "by"            : "10em" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-by-px-pct.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-by-px-pct.svg
new file mode 100644
index 0000000000..66c0f137ba
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-by-px-pct.svg
@@ -0,0 +1,19 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     width="200px" height="200px"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 10px; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "from"          : "10px",
+                           "by"            : "10%" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-by-px-px.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-by-px-px.svg
new file mode 100644
index 0000000000..e4bba5ae2e
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-by-px-px.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 10px; shape-rendering: crispEdges; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "from"          : "10px",
+                           "by"            : "20px" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-to-em-em.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-to-em-em.svg
new file mode 100644
index 0000000000..7e7d035739
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-to-em-em.svg
@@ -0,0 +1,19 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 10px; shape-rendering: crispEdges; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "from"          : "5em",
+                           "to"            : "15em" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-to-em-px.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-to-em-px.svg
new file mode 100644
index 0000000000..5c538b65b4
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-to-em-px.svg
@@ -0,0 +1,19 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 10px; shape-rendering: crispEdges; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "from"          : "5em",
+                           "to"            : "30px" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-to-no-no.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-to-no-no.svg
new file mode 100644
index 0000000000..1f4e5d09a2
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-to-no-no.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 10px; shape-rendering: crispEdges; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "from"          : "10",
+                           "to"            : "30" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-to-pct-pct.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-to-pct-pct.svg
new file mode 100644
index 0000000000..0da954bb54
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-to-pct-pct.svg
@@ -0,0 +1,19 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     width="200px" height="200px"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 5%; shape-rendering: crispEdges; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "from"          : "5%",
+                           "to"            : "15%" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-to-pct-px.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-to-pct-px.svg
new file mode 100644
index 0000000000..37afdef686
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-to-pct-px.svg
@@ -0,0 +1,19 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     width="200px" height="200px"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 5%; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "from"          : "5%",
+                           "to"            : "30px" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-to-px-em.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-to-px-em.svg
new file mode 100644
index 0000000000..4dd6908d09
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-to-px-em.svg
@@ -0,0 +1,19 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 10px; shape-rendering: crispEdges; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "from"          : "10px",
+                           "to"            : "15em" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-to-px-pct.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-to-px-pct.svg
new file mode 100644
index 0000000000..3c0b237f08
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-to-px-pct.svg
@@ -0,0 +1,19 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     width="200px" height="200px"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 10px; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "from"          : "10px",
+                           "to"            : "15%" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-to-px-px.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-to-px-px.svg
new file mode 100644
index 0000000000..2e4631b7a4
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-from-to-px-px.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 10px; shape-rendering: crispEdges; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "from"          : "10px",
+                           "to"            : "30px" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-ref.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-ref.svg
new file mode 100644
index 0000000000..0c6ad16742
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-ref.svg
@@ -0,0 +1,29 @@
+<svg xmlns="http://www.w3.org/2000/svg" shape-rendering="crispEdges">
+  <rect x="20px" y="20px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 10px">
+  </rect>
+  <rect x="70px" y="20px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 10px">
+  </rect>
+  <rect x="120px" y="20px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 13px">
+  </rect>
+  <rect x="20px" y="70px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 17.5px">
+  </rect>
+  <rect x="70px" y="70px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 19.9px">
+  </rect>
+  <rect x="120px" y="70px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 25px">
+  </rect>
+  <rect x="20px" y="120px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 26px">
+  </rect>
+  <rect x="70px" y="120px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 30px">
+  </rect>
+  <rect x="120px" y="120px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 30px">
+  </rect>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-to-em-em.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-to-em-em.svg
new file mode 100644
index 0000000000..07df6d5a1a
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-to-em-em.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 5em; shape-rendering: crispEdges; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "to"            : "15em" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-to-em-px.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-to-em-px.svg
new file mode 100644
index 0000000000..56ffff8d02
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-to-em-px.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 5em; shape-rendering: crispEdges; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "to"            : "30px" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-to-no-no.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-to-no-no.svg
new file mode 100644
index 0000000000..7784dd6ca2
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-to-no-no.svg
@@ -0,0 +1,17 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 10; shape-rendering: crispEdges; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "to"            : "30" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-to-pct-pct.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-to-pct-pct.svg
new file mode 100644
index 0000000000..d44e56b499
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-to-pct-pct.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     width="200px" height="200px"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 5%; shape-rendering: crispEdges; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "to"            : "15%" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-to-pct-px.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-to-pct-px.svg
new file mode 100644
index 0000000000..9d00d27444
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-to-pct-px.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     width="200px" height="200px"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 5%; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "to"            : "30px" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-to-px-em.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-to-px-em.svg
new file mode 100644
index 0000000000..17d5b76284
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-to-px-em.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 10px; shape-rendering: crispEdges; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "to"            : "15em" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-to-px-pct.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-to-px-pct.svg
new file mode 100644
index 0000000000..c7dd235f25
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-to-px-pct.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     width="200px" height="200px"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 10px; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "to"            : "15%" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-1-to-px-px.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-to-px-px.svg
new file mode 100644
index 0000000000..5121cb2bf0
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-1-to-px-px.svg
@@ -0,0 +1,17 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 10px; shape-rendering: crispEdges; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "to"            : "30px" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-2-ref.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-2-ref.svg
new file mode 100644
index 0000000000..fc16e65154
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-2-ref.svg
@@ -0,0 +1,29 @@
+<svg xmlns="http://www.w3.org/2000/svg">
+  <rect x="20px" y="20px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 10px">
+  </rect>
+  <rect x="70px" y="20px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 20px">
+  </rect>
+  <rect x="120px" y="20px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 17px">
+  </rect>
+  <rect x="20px" y="70px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 12.5px">
+  </rect>
+  <rect x="70px" y="70px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 10.1px">
+  </rect>
+  <rect x="120px" y="70px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 20px">
+  </rect>
+  <rect x="20px" y="120px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 22px">
+  </rect>
+  <rect x="70px" y="120px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 30px">
+  </rect>
+  <rect x="120px" y="120px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 30px">
+  </rect>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-2-values-em-em.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-2-values-em-em.svg
new file mode 100644
index 0000000000..d26e7d7041
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-2-values-em-em.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 10px; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "values"        : "10em; 5em; 15em" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-2-values-em-px.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-2-values-em-px.svg
new file mode 100644
index 0000000000..27a15b6663
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-2-values-em-px.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 10px; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "values"        : "10em; 10px; 15em" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-2-values-px-em.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-2-values-px-em.svg
new file mode 100644
index 0000000000..4fb2e61906
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-2-values-px-em.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 10px; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "values"        : "20px; 5em; 30px" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-2-values-px-px.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-2-values-px-px.svg
new file mode 100644
index 0000000000..b1a21817d3
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-2-values-px-px.svg
@@ -0,0 +1,17 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 10px; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "values"        : "20px; 10px; 30px" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-3-paced.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-3-paced.svg
new file mode 100644
index 0000000000..2449345ecd
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-3-paced.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 10px; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "calcMode"      : "paced",
+                           "values"        : "10px; 5px; 30px; 20px" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-3-ref.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-3-ref.svg
new file mode 100644
index 0000000000..2ddabf480c
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-3-ref.svg
@@ -0,0 +1,29 @@
+<svg xmlns="http://www.w3.org/2000/svg">
+  <rect x="20px" y="20px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 10px">
+  </rect>
+  <rect x="70px" y="20px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 10px">
+  </rect>
+  <rect x="120px" y="20px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 6px">
+  </rect>
+  <rect x="20px" y="70px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 15px">
+  </rect>
+  <rect x="70px" y="70px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 19.8px">
+  </rect>
+  <rect x="120px" y="70px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 30px">
+  </rect>
+  <rect x="20px" y="120px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 28px">
+  </rect>
+  <rect x="70px" y="120px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 20px">
+  </rect>
+  <rect x="120px" y="120px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 20px">
+  </rect>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-4-from-by-em-em.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-4-from-by-em-em.svg
new file mode 100644
index 0000000000..9a55c55fc6
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-4-from-by-em-em.svg
@@ -0,0 +1,19 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 30px; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "from"          : "15em",
+                           "by"            : "-10em" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-4-from-by-no-no.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-4-from-by-no-no.svg
new file mode 100644
index 0000000000..43845db4f7
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-4-from-by-no-no.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 30px; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "from"          : "30",
+                           "by"            : "-20" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-4-from-by-px-em.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-4-from-by-px-em.svg
new file mode 100644
index 0000000000..96aa4e4095
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-4-from-by-px-em.svg
@@ -0,0 +1,19 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 30px; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "from"          : "30px",
+                           "by"            : "-10em" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-4-from-by-px-px.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-4-from-by-px-px.svg
new file mode 100644
index 0000000000..f70c9617b1
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-4-from-by-px-px.svg
@@ -0,0 +1,18 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait"
+     onload="go()">
+  <style>
+    rect { stroke: blue; stroke-width: 30px; }
+  </style>
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "stroke-width",
+                           "from"          : "30px",
+                           "by"            : "-20px" };
+      testAnimatedRectGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-strokewidth-4-ref.svg b/layout/reftests/svg/smil/style/anim-css-strokewidth-4-ref.svg
new file mode 100644
index 0000000000..bfbb8e3fae
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-strokewidth-4-ref.svg
@@ -0,0 +1,29 @@
+<svg xmlns="http://www.w3.org/2000/svg">
+  <rect x="20px" y="20px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 30px">
+  </rect>
+  <rect x="70px" y="20px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 30px">
+  </rect>
+  <rect x="120px" y="20px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 27px">
+  </rect>
+  <rect x="20px" y="70px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 22.5px">
+  </rect>
+  <rect x="70px" y="70px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 20.1px">
+  </rect>
+  <rect x="120px" y="70px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 15px">
+  </rect>
+  <rect x="20px" y="120px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 14px">
+  </rect>
+  <rect x="70px" y="120px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 10px">
+  </rect>
+  <rect x="120px" y="120px" width="15px" height="15px" stroke="blue"
+        style="stroke-width: 10px">
+  </rect>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-wordspacing-1-ref.svg b/layout/reftests/svg/smil/style/anim-css-wordspacing-1-ref.svg
new file mode 100644
index 0000000000..18ab815f77
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-wordspacing-1-ref.svg
@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg">
+  <text x="50" y="50" font-size="20" word-spacing="15">hello there</text>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-css-wordspacing-1.svg b/layout/reftests/svg/smil/style/anim-css-wordspacing-1.svg
new file mode 100644
index 0000000000..46e636e076
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-css-wordspacing-1.svg
@@ -0,0 +1,8 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     class="reftest-wait" onload="setTimeAndSnapshot(3.0, true)">
+  <script xlink:href="../smil-util.js"/>
+  <text x="50" y="50" font-size="20">hello there
+    <animate attributeName="word-spacing" fill="freeze" from="0" to="20" begin="0s" dur="4s"/>
+  </text>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-mapped-fontsize-1-from-to-no-no.svg b/layout/reftests/svg/smil/style/anim-mapped-fontsize-1-from-to-no-no.svg
new file mode 100644
index 0000000000..2583c2a7ce
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-mapped-fontsize-1-from-to-no-no.svg
@@ -0,0 +1,17 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "font-size",
+                           "attributeType" : "XML",
+                           "from"          : "10",
+                           "to"            : "30" };
+      testAnimatedTextGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-mapped-fontsize-1-from-to-no-px.svg b/layout/reftests/svg/smil/style/anim-mapped-fontsize-1-from-to-no-px.svg
new file mode 100644
index 0000000000..4a487ece7a
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-mapped-fontsize-1-from-to-no-px.svg
@@ -0,0 +1,17 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "font-size",
+                           "attributeType" : "XML",
+                           "from"          : "10",
+                           "to"            : "30px" };
+      testAnimatedTextGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-mapped-fontsize-1-from-to-px-no.svg b/layout/reftests/svg/smil/style/anim-mapped-fontsize-1-from-to-px-no.svg
new file mode 100644
index 0000000000..689fd045d4
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-mapped-fontsize-1-from-to-px-no.svg
@@ -0,0 +1,17 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+     style="font-size: 2px"
+     class="reftest-wait"
+     onload="go()">
+  <script xlink:href="../smil-grid.js" type="text/javascript"/>
+  <script xlink:href="../smil-util.js" type="text/javascript"/>
+  <script>
+    function go() {
+      var animAttrHash = { "attributeName" : "font-size",
+                           "attributeType" : "XML",
+                           "from"          : "10px",
+                           "to"            : "30" };
+      testAnimatedTextGrid("animate", [animAttrHash]);
+    }
+  </script>
+</svg>
diff --git a/layout/reftests/svg/smil/style/anim-standard-ref.svg b/layout/reftests/svg/smil/style/anim-standard-ref.svg
new file mode 100644
index 0000000000..39f37ae6d1
--- /dev/null
+++ b/layout/reftests/svg/smil/style/anim-standard-ref.svg
@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg">
+  <rect x="15" y="15" width="200" height="200" fill="blue"/>
+</svg>
diff --git a/layout/reftests/svg/smil/style/important-set-1.svg b/layout/reftests/svg/smil/style/important-set-1.svg
new file mode 100644
index 0000000000..197ba26b6f
--- /dev/null
+++ b/layout/reftests/svg/smil/style/important-set-1.svg
@@ -0,0 +1,8 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+>
+  <rect x="15" y="15" width="200" height="200" style="fill: blue !important">
+    <set attributeName="fill" attributeType="CSS"
+         to="red" begin="0s" fill="freeze"/>
+  </rect>
+</svg>
diff --git a/layout/reftests/svg/smil/style/important-set-2.svg b/layout/reftests/svg/smil/style/important-set-2.svg
new file mode 100644
index 0000000000..e5515db10c
--- /dev/null
+++ b/layout/reftests/svg/smil/style/important-set-2.svg
@@ -0,0 +1,11 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink"
+>
+  <style>
+    rect { fill: blue !important; }
+  </style>
+  <rect x="15" y="15" width="200" height="200">
+    <set attributeName="fill" attributeType="CSS"
+         to="red" begin="0s" fill="freeze"/>
+  </rect>
+</svg>
diff --git a/layout/reftests/svg/smil/style/namespaced-property-1.svg b/layout/reftests/svg/smil/style/namespaced-property-1.svg
new file mode 100644
index 0000000000..415c1ffb62
--- /dev/null
+++ b/layout/reftests/svg/smil/style/namespaced-property-1.svg
@@ -0,0 +1,6 @@
+<svg xmlns="http://www.w3.org/2000/svg"
+     xmlns:xlink="http://www.w3.org/1999/xlink">
+  <rect x="15" y="15" width="200" height="200" fill="blue">
+    <set attributeName="xlink:opacity" to="0.5" begin="0s" fill="freeze"/>
+  </rect>
+</svg>
diff --git a/layout/reftests/svg/smil/style/reftest.list b/layout/reftests/svg/smil/style/reftest.list
new file mode 100644
index 0000000000..a7888a3abe
--- /dev/null
+++ b/layout/reftests/svg/smil/style/reftest.list
@@ -0,0 +1,169 @@
+# Tests related to SVG Animation (using SMIL) of CSS properties
+
+# XXXdholbert TODO: Test color animation with "color-interpolation: linearRGB"
+# (when it's implemented)
+
+# 'color' property, from/to/by with named colors & hex values
+== anim-css-color-1-by-ident-hex.svg         anim-css-fill-1-ref.svg
+== anim-css-color-1-from-by-hex-hex.svg      anim-css-fill-1-ref.svg
+fuzzy(0-1,0-550) == anim-css-color-1-from-by-ident-hex.svg anim-css-fill-1-ref.svg
+fuzzy(0-1,0-550) == anim-css-color-1-from-to-hex-hex.svg anim-css-fill-1-ref.svg
+fuzzy(0-1,0-550) == anim-css-color-1-from-to-ident-ident.svg anim-css-fill-1-ref.svg
+fuzzy(0-1,0-550) == anim-css-color-1-to-ident-hex.svg anim-css-fill-1-ref.svg
+fuzzy(0-1,0-550) == anim-css-color-1-to-ident-ident.svg anim-css-fill-1-ref.svg
+
+# 'color' property, paced calcMode
+== anim-css-color-2-paced-rgb.svg            anim-css-fill-2-ref.svg
+
+# 'color' property, animating *by* a named color
+fuzzy(0-1,0-580) == anim-css-color-3-by-ident-ident.svg anim-css-fill-3-ref.svg
+fuzzy(0-1,0-580) == anim-css-color-3-from-by-ident-ident.svg anim-css-fill-3-ref.svg
+fuzzy(0-1,0-580) == anim-css-color-3-from-by-rgb-ident.svg anim-css-fill-3-ref.svg
+
+# 'fill' property, from/to/by with named colors & hex values
+fuzzy(0-1,0-550) == anim-css-fill-1-by-ident-hex.svg anim-css-fill-1-ref.svg
+fuzzy(0-1,0-550) == anim-css-fill-1-from-by-hex-hex.svg anim-css-fill-1-ref.svg
+fuzzy(0-1,0-550) == anim-css-fill-1-from-by-ident-hex.svg anim-css-fill-1-ref.svg
+fuzzy(0-1,0-550) == anim-css-fill-1-from-to-hex-hex.svg anim-css-fill-1-ref.svg
+fuzzy(0-1,0-550) == anim-css-fill-1-from-to-ident-ident.svg anim-css-fill-1-ref.svg
+fuzzy(0-1,0-550) == anim-css-fill-1-to-ident-hex.svg anim-css-fill-1-ref.svg
+fuzzy(0-1,0-550) == anim-css-fill-1-to-ident-ident.svg anim-css-fill-1-ref.svg
+
+# 'fill' property, from/to/by, with 'currentColor' keyword
+fuzzy(0-1,0-550) == anim-css-fill-1-by-ident-curcol.svg anim-css-fill-1-ref.svg
+fuzzy(0-1,0-550) == anim-css-fill-1-from-by-curcol-hex.svg anim-css-fill-1-ref.svg
+fuzzy(0-1,0-550) == anim-css-fill-1-from-by-hex-curcol.svg anim-css-fill-1-ref.svg
+fuzzy(0-1,0-550) == anim-css-fill-1-from-to-curcol-hex.svg anim-css-fill-1-ref.svg
+fuzzy(0-1,0-550) == anim-css-fill-1-from-to-hex-curcol.svg anim-css-fill-1-ref.svg
+fuzzy(0-1,0-550) == anim-css-fill-1-to-ident-curcol.svg anim-css-fill-1-ref.svg
+
+# 'fill' property, paced calcMode
+== anim-css-fill-2-paced-rgb.svg            anim-css-fill-2-ref.svg
+
+# 'fill' property, animating *by* a named color
+fuzzy(0-1,0-580) == anim-css-fill-3-by-ident-ident.svg anim-css-fill-3-ref.svg
+fuzzy(0-1,0-580) == anim-css-fill-3-from-by-ident-ident.svg anim-css-fill-3-ref.svg
+fuzzy(0-1,0-580) == anim-css-fill-3-from-by-rgb-ident.svg anim-css-fill-3-ref.svg
+
+# check handling of overflowing color values
+# NOTE: Some of the tests below fail in Gecko because we compute
+# "from + by" as the animation end-point, and we clamp that final color value
+# (due to bug 515919) and use the clamped value for interpolation.
+# That's earlier than the SVG spec wants us to clamp -- we're only supposed to
+# clamp *final presentation values*.
+# (Reference: SVG 1.1 Appendix F.4)
+== anim-css-fill-overflow-1-by.svg       anim-css-fill-overflow-1-ref.svg
+== anim-css-fill-overflow-1-from-by.svg anim-css-fill-overflow-1-ref.svg # bug 515919
+== anim-css-stopcolor-overflow-1-from-by.svg anim-css-stopcolor-overflow-1-ref.svg # bug 515919
+== anim-css-floodcolor-overflow-1-from-by.svg anim-css-floodcolor-overflow-1-ref.svg # bug 515919
+
+# 'fill-opacity' property
+fuzzy(0-1,0-885) == anim-css-fillopacity-1-by.svg anim-css-fillopacity-1-ref.svg
+fuzzy(0-1,0-210) == anim-css-fillopacity-1-from-by.svg anim-css-fillopacity-1-ref.svg
+== anim-css-fillopacity-1-from-to.svg       anim-css-fillopacity-1-ref.svg
+fuzzy(0-1,0-550) == anim-css-fillopacity-1-to.svg anim-css-fillopacity-1-ref.svg
+== anim-css-fillopacity-2-paced.svg         anim-css-fillopacity-2-ref.svg
+fails == anim-css-fillopacity-3-clamp-big.svg     anim-css-fillopacity-3-ref.svg # bug 501188
+fuzzy(0-1,0-365) == anim-css-fillopacity-3-clamp-small.svg anim-css-fillopacity-3-ref.svg
+
+# 'font' shorthand property
+fuzzy-if(gtkWidget,255-255,1520-1520) == anim-css-font-1.svg  anim-css-font-1-ref.svg # Windows: Bug 1392106 Linux: Bug 1599619
+
+# 'font-size' property, from/by/to with pixel values only
+== anim-css-fontsize-1-from-by-px-px.svg    anim-css-fontsize-1-ref.svg
+== anim-css-fontsize-1-from-to-px-px.svg    anim-css-fontsize-1-ref.svg
+
+# 'font-size' property (accepts unitless values)
+== anim-css-fontsize-1-from-to-no-no.svg    anim-css-fontsize-1-ref.svg
+== anim-css-fontsize-1-from-to-no-px.svg    anim-css-fontsize-1-ref.svg
+== anim-css-fontsize-1-from-to-px-no.svg    anim-css-fontsize-1-ref.svg
+
+# 'font-size' mapped attribute (accepts unitless values)
+== anim-mapped-fontsize-1-from-to-no-no.svg anim-css-fontsize-1-ref.svg
+== anim-mapped-fontsize-1-from-to-no-px.svg anim-css-fontsize-1-ref.svg
+== anim-mapped-fontsize-1-from-to-px-no.svg anim-css-fontsize-1-ref.svg
+
+# 'font-size' property, from/by/to with percent values
+== anim-css-fontsize-1-from-by-pct-pct.svg  anim-css-fontsize-1-ref.svg
+== anim-css-fontsize-1-from-by-pct-px.svg   anim-css-fontsize-1-ref.svg
+== anim-css-fontsize-1-from-by-px-pct.svg   anim-css-fontsize-1-ref.svg
+== anim-css-fontsize-1-from-to-pct-pct.svg  anim-css-fontsize-1-ref.svg
+== anim-css-fontsize-1-from-to-pct-px.svg   anim-css-fontsize-1-ref.svg
+== anim-css-fontsize-1-from-to-px-pct.svg   anim-css-fontsize-1-ref.svg
+
+# 'font-size' property, with negative addition
+== anim-css-fontsize-2-from-by-px-px.svg    anim-css-fontsize-2-ref.svg
+== anim-css-fontsize-2-from-by-px-em.svg    anim-css-fontsize-2-ref.svg
+== anim-css-fontsize-2-from-by-em-em.svg    anim-css-fontsize-2-ref.svg
+
+# 'stroke-dasharray' property, from/to with pixel values only
+fails == anim-css-strokedasharray-1.svg anim-css-strokedasharray-1-ref.svg # bug 474049
+
+# 'stroke-width' property, from/by/to with pixel values only
+== anim-css-strokewidth-1-by-px-px.svg        anim-css-strokewidth-1-ref.svg
+== anim-css-strokewidth-1-from-by-px-px.svg   anim-css-strokewidth-1-ref.svg
+== anim-css-strokewidth-1-from-to-px-px.svg   anim-css-strokewidth-1-ref.svg
+== anim-css-strokewidth-1-to-px-px.svg        anim-css-strokewidth-1-ref.svg
+
+# 'stroke-width' property, from/by/to with unitless values only
+== anim-css-strokewidth-1-by-no-no.svg        anim-css-strokewidth-1-ref.svg
+== anim-css-strokewidth-1-from-by-no-no.svg   anim-css-strokewidth-1-ref.svg
+== anim-css-strokewidth-1-from-to-no-no.svg   anim-css-strokewidth-1-ref.svg
+== anim-css-strokewidth-1-to-no-no.svg        anim-css-strokewidth-1-ref.svg
+
+# 'stroke-width' property, from/by/to with percent values
+# XXXdholbert the mixed pct + px tests fail right now, because we need calc()
+# in order to interpolate between pct and non-pct values, and we don't yet
+# support calc() for stroke-width & other SVG-specific properties.
+#
+# Bug 1258270 and 1386967
+== anim-css-strokewidth-1-by-pct-pct.svg                          anim-css-strokewidth-1-ref.svg
+fails == anim-css-strokewidth-1-by-pct-px.svg                     anim-css-strokewidth-1-ref.svg
+fails == anim-css-strokewidth-1-by-px-pct.svg                     anim-css-strokewidth-1-ref.svg
+fails-if(!useDrawSnapshot) == anim-css-strokewidth-1-from-by-pct-pct.svg anim-css-strokewidth-1-ref.svg # bug 1459418
+fails == anim-css-strokewidth-1-from-by-pct-px.svg                anim-css-strokewidth-1-ref.svg
+fails == anim-css-strokewidth-1-from-by-px-pct.svg                anim-css-strokewidth-1-ref.svg
+fails-if(!useDrawSnapshot) == anim-css-strokewidth-1-from-to-pct-pct.svg anim-css-strokewidth-1-ref.svg # bug 1459418
+fails == anim-css-strokewidth-1-from-to-pct-px.svg                anim-css-strokewidth-1-ref.svg
+fails == anim-css-strokewidth-1-from-to-px-pct.svg                anim-css-strokewidth-1-ref.svg
+fails-if(!useDrawSnapshot) == anim-css-strokewidth-1-to-pct-pct.svg anim-css-strokewidth-1-ref.svg # bug 1459418
+fails == anim-css-strokewidth-1-to-pct-px.svg                     anim-css-strokewidth-1-ref.svg
+fails == anim-css-strokewidth-1-to-px-pct.svg                     anim-css-strokewidth-1-ref.svg
+
+# 'stroke-width' property, from/by/to with em values
+== anim-css-strokewidth-1-by-px-em.svg        anim-css-strokewidth-1-ref.svg
+== anim-css-strokewidth-1-by-em-em.svg        anim-css-strokewidth-1-ref.svg
+== anim-css-strokewidth-1-by-em-px.svg        anim-css-strokewidth-1-ref.svg
+== anim-css-strokewidth-1-from-by-px-em.svg   anim-css-strokewidth-1-ref.svg
+== anim-css-strokewidth-1-from-by-em-em.svg   anim-css-strokewidth-1-ref.svg
+== anim-css-strokewidth-1-from-by-em-px.svg   anim-css-strokewidth-1-ref.svg
+== anim-css-strokewidth-1-from-to-px-em.svg   anim-css-strokewidth-1-ref.svg
+== anim-css-strokewidth-1-from-to-em-em.svg   anim-css-strokewidth-1-ref.svg
+== anim-css-strokewidth-1-from-to-em-px.svg   anim-css-strokewidth-1-ref.svg
+== anim-css-strokewidth-1-to-px-em.svg        anim-css-strokewidth-1-ref.svg
+== anim-css-strokewidth-1-to-em-em.svg        anim-css-strokewidth-1-ref.svg
+== anim-css-strokewidth-1-to-em-px.svg        anim-css-strokewidth-1-ref.svg
+
+# 'stroke-width' property, values-array & paced calc-mode support
+== anim-css-strokewidth-2-values-em-em.svg    anim-css-strokewidth-2-ref.svg
+== anim-css-strokewidth-2-values-em-px.svg    anim-css-strokewidth-2-ref.svg
+== anim-css-strokewidth-2-values-px-em.svg    anim-css-strokewidth-2-ref.svg
+fuzzy(0-1,0-360) == anim-css-strokewidth-2-values-px-px.svg anim-css-strokewidth-2-ref.svg
+== anim-css-strokewidth-3-paced.svg           anim-css-strokewidth-3-ref.svg
+
+# 'stroke-width' property, negative addition
+== anim-css-strokewidth-4-from-by-px-px.svg   anim-css-strokewidth-4-ref.svg
+== anim-css-strokewidth-4-from-by-px-em.svg   anim-css-strokewidth-4-ref.svg
+== anim-css-strokewidth-4-from-by-em-em.svg   anim-css-strokewidth-4-ref.svg
+fuzzy(0-1,0-170) == anim-css-strokewidth-4-from-by-no-no.svg anim-css-strokewidth-4-ref.svg
+
+# check correct handling of "!important" values
+== important-set-1.svg  anim-standard-ref.svg
+== important-set-2.svg  anim-standard-ref.svg
+
+# check namespaced attribute
+== namespaced-property-1.svg  anim-standard-ref.svg
+
+# 'letter-spacing' and 'word-spacing'
+== anim-css-letterspacing-1.svg anim-css-letterspacing-1-ref.svg
+== anim-css-wordspacing-1.svg anim-css-wordspacing-1-ref.svg
-- 
cgit v1.2.3