[whatwg] SVG extensions to <canvas>

[ddailey]

> On Thu, 30 Apr 2009 21:15:04 +0200, Ian Hickson <ian at hixie.ch> wrote:
>> As far as I can tell this doesn't require any changes to HTML5, since the
>> same applies here as applies to a regular <img>, right?

Anne van Kesteren replied:
> Maybe you misunderstood, but the request was not about <img> referencing 
> SVG, but passing an SVGSVGElement object directly to drawImage() and 
> friends.

Maybe I misunderstood (or, more precisely, I am about to state my probable 
misunderstanding):

Does this mean for example, that the author could take a chunk of <svg> code 
or its equivalent and pass it to canvas.drawImage() (and friends) and then 
have a raster version in JavaScript of the <svg> ? If so, then would that 
not allow, client-side, things like interrogating pixel values at point 
(x,y) within an SVG? That's something I'd like to see. I understand that if 
done improperly this can yield security problems across domains, but it 
seems in this case we're only talking one domain.

David