[whatwg] [canvas] inner shadows
cabanier at gmail.com
Fri Nov 23 16:13:28 PST 2012
On Fri, Nov 23, 2012 at 4:03 PM, Ian Hickson <ian at hixie.ch> wrote:
> On Fri, 23 Nov 2012, Rik Cabanier wrote:
> > It would still be quite complex to draw an inner shadow this way because
> > the blur is calculated on the inverse of the shape.
> > A user will need to draw to another canvas and then 'clear' it to get the
> > inverse.
> Turns out it's much easier than that; see my e-mail just now.
No. You don't want to see a black shadow with blurred edges.
For an 'inner' shadow, the shadow image sits outside the shape so you have
to calculate that.
> > > Is this something implementors would be interested in?
> > It seems like this would be easy for them to implement...
> That's not really the question. :-)
> There's a cost to every feature. We have to prioritise.
> Ian Hickson U+1047E )\._.,--....,'``. fL
> http://ln.hixie.ch/ U+263A /, _.. \ _\ ;`._ ,.
> Things that are impossible just take longer. `._.-(,_..'--(,_..'`-.;.'
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