I have a Fabric.js prototype where people can load photos, text, and maps into the canvas. When they're done, I want them to be able to save the canvas as an image. I've tried using the standard:

canvasURL = canvas.toDataURL();

var image = new Image();

image.src = canvas.toDataURL(image/png);

$('#canvasContainer').replaceWith(image);

but it says that the canvas is tainted - I think because of the images (the method above works when it's just text). The error is:

Uncaught SecurityError: Failed to execute 'toDataURL' on 'HTMLCanvasElement': Tainted canvases may not be exported. 

I can use Fabric's built-in method to save as SVG:

var canvasSVG = canvas.toSVG();

$('#canvasContainer').replaceWith(canvasSVG);

But I'd rather have a PNG/JPG. Any ideas?

Here's the Fabric.js documentation on serialization of the canvas.

http://fabricjs.com/fabric-intro-part-3/#serialization