Re: Web Audio API Proposal

On Wed, Jun 16, 2010 at 12:10 PM, Chris Marrin <cmarrin@apple.com> wrote:

> On Jun 15, 2010, at 4:38 PM, Robert O'Callahan wrote:
>
> I claim that stringing together a series of SVG filters to achieve the
> effect you want is often more clumsy and lower performance than writing the
> effect directly in a more programmable model --- even if you find the
> simplest possible set of filters that work.
>
> What more programmable model is available to test this statement against?


GLSL? I think almost any "programmable model" would do a better job on
monstrosities like this:
http://mxr.mozilla.org/mozilla-central/source/layout/tools/reftest/reftest-analyzer.xhtml#299

> OK, but is there any evidence that they're complete? What fraction of use
> cases would be forced to resort to JS-based sample processing?
>
> We can't know that.


We can at least collect use cases, starting with existing demos that get
direct access to samples, and see how many of them fit.

> I have never seen anyone implement their own kinds of curves in 2D canvas
> because Beziers weren't adequate to describe their paths.
>
> >
> I don't want to belabor this point, but there are many mathematical curve
> types that can't be represented with cubic beziers. These are usually
> approximated with piecewise linear curves.
>

I understand that, but I have not seen JS canvas apps doing this, which
suggests that for the vast majority of canvas use cases, Beziers suffice.

Rob
-- 
"He was pierced for our transgressions, he was crushed for our iniquities;
the punishment that brought us peace was upon him, and by his wounds we are
healed. We all, like sheep, have gone astray, each of us has turned to his
own way; and the LORD has laid on him the iniquity of us all." [Isaiah
53:5-6]