Inserting HTML into canvas without creating CORS restriction

I am trying to get the image data from a canvas to which I added a HTML element's data by using MDN's method. After I insert the HTML data, I can't access the canvas' image data anymore though (in Chrome):

//This function is a direct copy of http://ift.tt/1wM4r2W
onload = function() {
  var canvas = document.getElementById('canvas');
  var ctx = canvas.getContext('2d');

  var data = '<svg xmlns="http://ift.tt/nvqhV5" width="200" height="200">' +
      '<foreignObject width="100%" height="100%">' +
      '<div xmlns="http://ift.tt/lH0Osb" style="font-size:14px">' +
      'example' +
      '</div>' +
      '</foreignObject>' +
      '</svg>';

  var DOMURL = window.URL || window.webkitURL || window;

  var img = new Image();
  var svg = new Blob([data], {type: 'image/svg+xml;charset=utf-8'});
  var url = DOMURL.createObjectURL(svg);

  img.onload = function () {
    ctx.drawImage(img, 0, 0);
    DOMURL.revokeObjectURL(url);
    getData(ctx);
  };

  img.src = url;
};

//the part where it goes wrong:
function getData(ctx) {
  try {
    ctx.getImageData(0,0,100,100);
  } catch(e) {
    alert(e);
  }
}

<canvas id="canvas"></canvas>

My question is: is it possible to insert the HTML data, and still be able to access the image data?