1 files changed, 31 insertions, 0 deletions
diff --git a/src/spof.js b/src/spof.js
new file mode 100644
index 0000000..cf4fe2f
--- /dev/null
+++ b/src/spof.js
@@ -0,0 +1,31 @@
+// Fix for possible sub-pixel offset. See:
+// https://bugzilla.mozilla.org/show_bug.cgi?id=608812
+SVG.extend(SVG.Doc, {
+  // Callback
+  spof: function() {
+    if (this.doSpof) {
+      var pos = this.node.getScreenCTM()
+      
+      if (pos)
+        this
+          .style('left', (-pos.e % 1) + 'px')
+          .style('top',  (-pos.f % 1) + 'px')
+    }
+    
+    return this
+  }
+
+  // Sub-pixel offset enabler
+, fixSubPixelOffset: function() {
+    var self = this
+
+    // Enable spof
+    this.doSpof = true
+
+    // Make sure sub-pixel offset is fixed every time the window is resized
+    SVG.on(window, 'resize', function() { self.spof() })
+
+    return this.spof()
+  }
+  
+})
+\ No newline at end of file