[whatwg] Offscreen canvas (or canvas for web workers).

[David Levin]

On Fri, Mar 12, 2010 at 2:35 PM, Jonas Sicking <jonas at sicking.cc> wrote:

> On Fri, Mar 12, 2010 at 12:46 PM, Oliver Hunt <oliver at apple.com> wrote:
> >
> > On Mar 12, 2010, at 12:16 PM, Jonas Sicking wrote:
> >> I'm not saying that the proposed API is bad. It just doesn't seem to
> >> solve the (seemingly most commonly requested) use case of
> >> rotating/scaling images. So if we want to solve those use cases we
> >> need to either come up with a separate API for that, or extend this
> >> proposal to solve that use case somehow.
> >
> > Just for reference I think one thing that people are forgetting that
> there is a difference between
> > being computationally faster, and being more responsive.
>
> As I mentioned in my email, if you look at the steps listed, enough of
> them happen *on the main thread* that you're spending far more of the
> main threads CPU cycles than you'd like. Possibly even more than doing
> all the resizing on the main thread.
>
> With the other improvements suggested by David things do definitely
> look different, but those are not in a proposal yet.
>

There is the other scenario I mentioned, but I'll see what I can do about
separately working up a proposal for adding those methods because they were
next on my list to deal with. (fromBlob/load may be enough for this.)

dave
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