Rasterizing an in-document SVG to Canvas

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In Firefox, SVG images taint the canvas but we’re working on removing that restriction in https://bugzilla.mozilla.org/show_bug.cgi?id=672013 when that bug lands what you’re trying to do should be possible. This restriction has been removed in FFv12.

All browsers implement similar restrictions and all are working on removing them; generally by making what you can do in SVG images more restricted. For instance we don’t want to get back to the bad old days of being able to work out what sites you’ve visited by creating an SVG image with links in it and then reading off the colour of the links using canvas.

In addition at the moment firefox requires that the svg element have width and height attributes in order to render to canvas. This restriction may be removed in future.

Edit by Phrogz: as noted in my comment above, I received independent confirmation that the security issue in Chrome is the same issue: Chrome (currently) always taints a canvas when an SVG document is drawn to it.

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