[whatwg] Canvas operators (was Re: several messages)

Krzysztof Żelechowski giecrilj at stegny.2a.pl
Wed Jan 16 07:35:47 PST 2008

Dnia 16-01-2008, Śr o godzinie 02:48 +0000, Ian Hickson pisze:
> On Sun, 20 May 2007, ddailey wrote:
> > Another question arises in my mind in this context: is there any reason 
> > that any of the treatments of these effects (like the Porter-Duff 
> > operators, darken, saturate etc.) should be any different than they are 
> > in the SVG spec? So many things that I see in the treatment of canvas 
> > remind me of something so similar to what is in SVG that it makes me 
> > wonder why not just reference say http://www.w3.org/TR/SVG/filters.html 
> > ?
> The <canvas> globalCompositeOperation is just defined in terms of 
> PorterDuff, which far predates SVG.

And why does the canvas specification have to pretend that it predates
SVG too?

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