Retina textbox toDataURL image appears different to fabric object on canvas.

[ghost]

Version

1.6.1

Test Case

http://jsfiddle.net/7dq9ucyb/1/

Steps to reproduce

1. Create a textbox on a fabric canvas on a "retina" screen (e.g. macbook pro retina)
2. Call toDataURL on the textbox
3. Place the generated data URL into an image tag and append it to the body

Expected Behavior

The data url image should be double the apparent size of the textbox but the crop and padding of the text should be exactly matching what is on the canvas.

Actual Behavior

The text appears cropped differently in the data url when compared with the original canvas rendering.

Object on Canvas:

Data URL image: