[Sugar-devel] Preview field in web activities

[Suraj K S]

I'm able to capture the screen shot of the activity using
http://html2canvas.hertzen.com/

It captures the screenshot and returns a canvas.

Now to convert it to a png image I'm using:

var previewImage = canvas.toDataURL("image/png;base64");

The problem with this is that it throws a

SECURITY_ERR: DOM Exception 18

After reading a bit on this error, got to know that when the canvas has an
element whose origin-clean flag is set to false, it would generate this
error.
Not able to understand why exactly this is happening in Sugar though.

Is there a way around this?
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