title: fabric JS toDataURL is producing large images with iPad browsers.
body: <p>I have created a small website that lets users create a collage of images in frames.  I have no issues with all browsers I have tried...except any browsers on my iPad; both Chrome and Safari.</p>
  
  <p>My call to save the canvas is as follows...</p>
  
  <pre><code>var durl = fabCanvas.toDataURL({
     format: 'png',
     multiplier: 1
  });
  </code></pre>
  
  <p>The image should come out as follows...
  <br>
  <br>
  <a href="https://i.stack.imgur.com/IHfmh.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/IHfmh.png" alt="enter image description here"></a>
  <br>
  <br>
  But instead it is coming out like so...
  <br>
  <br>
  <a href="https://i.stack.imgur.com/iNvJN.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/iNvJN.png" alt="enter image description here"></a>
  <br>
  <br>
  These images are not big.  Any reason why it would be doing this?</p>
  
  <p>Thanks in advance.</p>