From caa965d23db217e4c5913d5207b41c843bc1dbc5 Mon Sep 17 00:00:00 2001
From: "Davide P. Cervone" <dpvc@union.edu>
Date: Thu, 31 Jan 2013 15:39:21 -0500
Subject: [PATCH] Add a pixel extra around the SVG image to accommodate
 antialiasing pixels.  Also, try to work around truncation versus rounding
 issue in Chrome for ex-sizes (may not work well in other browsers, though). 
 Addresses issue #383.

---
 unpacked/jax/output/SVG/config.js |  2 +-
 unpacked/jax/output/SVG/jax.js    | 17 ++++++++++++-----
 2 files changed, 13 insertions(+), 6 deletions(-)

diff --git a/unpacked/jax/output/SVG/config.js b/unpacked/jax/output/SVG/config.js
index e8c1f585e..e66b18aee 100644
--- a/unpacked/jax/output/SVG/config.js
+++ b/unpacked/jax/output/SVG/config.js
@@ -24,7 +24,7 @@
 
 MathJax.OutputJax.SVG = MathJax.OutputJax({
   id: "SVG",
-  version: "2.1",
+  version: "2.1.1",
   directory: MathJax.OutputJax.directory + "/SVG",
   extensionDir: MathJax.OutputJax.extensionDir + "/SVG",
   autoloadDir: MathJax.OutputJax.directory + "/SVG/autoload",
diff --git a/unpacked/jax/output/SVG/jax.js b/unpacked/jax/output/SVG/jax.js
index 7a61925e2..83d525074 100644
--- a/unpacked/jax/output/SVG/jax.js
+++ b/unpacked/jax/output/SVG/jax.js
@@ -414,8 +414,15 @@
       if (Math.abs(m) < .0006) {return "0em"}
       return m.toFixed(3).replace(/\.?0+$/,"") + "em";
     },
+    /* 
+     * Ex: function (m) {
+     *   m = m / this.TeX.x_height;
+     *   if (Math.abs(m) < .0006) {return "0ex"}
+     *   return m.toFixed(3).replace(/\.?0+$/,"") + "ex";
+     * },
+     */
     Ex: function (m) {
-      m = m / this.TeX.x_height;
+      m = Math.round(m / this.TeX.x_height * this.ex) / this.ex;
       if (Math.abs(m) < .0006) {return "0ex"}
       return m.toFixed(3).replace(/\.?0+$/,"") + "ex";
     },
@@ -1891,10 +1898,10 @@
           var l = Math.max(-svg.l,0), r = Math.max(svg.r-svg.w,0);
           var style = svg.element.style;
           style.width = SVG.Ex(l+svg.w+r);
-          style.height = SVG.Ex(svg.H+svg.D);
-          style.verticalAlign = SVG.Ex(-svg.D-2*SVG.em); // remove 2 extra pixels added below
+          style.height = SVG.Ex(svg.H+svg.D+2*SVG.em);
+          style.verticalAlign = SVG.Ex(-svg.D-3*SVG.em); // remove 2 extra pixels added below plus padding
           style.marginLeft = SVG.Ex(-l); style.marginRight = SVG.Ex(-r);
-          svg.element.setAttribute("viewBox",(-l)+" "+(-svg.H)+" "+(l+svg.w+r)+" "+(svg.H+svg.D));
+          svg.element.setAttribute("viewBox",(-l)+" "+(-svg.H-SVG.em)+" "+(l+svg.w+r)+" "+(svg.H+svg.D+2*SVG.em));
           svg.element.style.margin="1px 0px"; // 1px above and below to prevent lines from touching
           //
           //  If there is extra height or depth, hide that
@@ -1906,7 +1913,7 @@
                               width:SVG.Ex(svg.w), height:SVG.Ex(svg.h+svg.d),
                               "vertical-align":SVG.Ex(-svg.d)}}]]);
             frame.firstChild.appendChild(svg.element); svg.element = frame;
-            style.verticalAlign = ""; style.position = "absolute";
+            style.verticalAlign = style.margin = ""; style.position = "absolute";
             style.bottom = SVG.Ex(svg.d-svg.D); style.left = 0;
           }
           //