message: make viewport clip.
diff: @@ -80,6 +80,11 @@ SVGParser.prototype.parse = function (xml) {
  child = child.nextSibling;
  }
  + // The viewport should clip contents.
  + root.setClipPath(new Rect({
  + shape: {x: 0, y: 0, width: width, height: height}
  + }));
  +
  // Set width/height on group just for output the viewport size.
  root.width = width;
  root.height = height;
  