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On Sat, 15 Mar 2014, Dirk Schulze wrote: > > I would suggest a filter attribute that takes a list of filter > operations similar to the CSS Image filter function. Similar to > shadows[2], each drawing operation would be filtered. The API looks like > this: > > partial interface CanvasRenderingContext2D { > attribute DOMString filter; > } > > A filter DOMString could looks like: “contrast(50%) blur(3px)” > > With the combination of grouping in canvas it would be possible to > group drawing operations and filter them together. > > Filter functions include a reference to a <filter> element and a > specification of SVG filters. I am unsure if a reference do an element > within a document can cause problems. If it does, we would just not > support SVG filter references.
See also: http://lists.whatwg.org/pipermail/whatwg-whatwg.org/2012-September/037432.html
That's: http://lists.w3.org/Archives/Public/public-whatwg-archive/2012Sep/0348.html See also: http://lists.w3.org/Archives/Public/public-whatwg-archive/2014Sep/thread.html#msg110
https://github.com/whatwg/html/pull/978