[whatwg] Adding SVG Filter-like functionality to Canvas 2D Context

[Hans Schmucker]

> I think in practice if people have declarative filter needs, they'll just
> use SVG. But that said, filters are indeed something we should look at in
> a future version. Right now, though, I'd rather we let the browser vendors
> get interoperable on what exists already in the spec.

Often, you have need for both. Right now it's either fast,
declarative, but limited OR slow, but customizable.

About interoperability: At least for me Canvas support seems very
stable across browsers, which is why I'm comfortable asking for the
next step, as long as including it doesn't change compatibility with
existing JS code and wouldn't require needlessly complicated
fallbacks. Both fallbacks and support would be pretty straight-forward
for this.