[whatwg] Canvas Path.addPath SVGMatrix not optimal?

Justin Novosad junov at google.com
Wed Mar 19 14:22:58 PDT 2014

On Wed, Mar 19, 2014 at 4:46 PM, Dirk Schulze <dschulze at adobe.com> wrote:

> Hi,
> I just looked at the definition of Path.addPath[1]:
>     void addPath(Path path, SVGMatrix? transformation);
> SVGMatrix is nullable but can not be omitted all together. Why isn’t it
> optional as well? I think it should be optional, especially because
> creating an SVGMatrix at the moment means writing:
>     var matrix = document.createElementNS('http://www.w3.org/2000/svg
> ','svg').createSVGMatrix();
> Greetings,
> Dirk
> [1]
> http://www.whatwg.org/specs/web-apps/current-work/multipage/the-canvas-element.html#path

I agree it should be optional, but just to play devil's advocate : you can
create an identity SVGMatrix with a simpler bit of code. Just do this right
after creating a canvas rendering context: var identity =


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