- From: Robert O'Callahan <robert@ocallahan.org>
- Date: Sun, 20 Oct 2013 09:28:49 +0200
- To: Rik Cabanier <cabanier@gmail.com>
- Cc: Justin Novosad <junov@google.com>, "whatwg@whatwg.org" <whatwg@whatwg.org>
On Fri, Oct 18, 2013 at 6:50 AM, Rik Cabanier <cabanier@gmail.com> wrote:
> Extra methods on the canvas API:
>
> Promise setTaskScript(DOMString script); // can error be in promise?
> Promise executeTask(DOMString id, dictionary json, boolean synchronized =
> true); // Transferable elements allowed in dictionary
>
> Object that is active in the task:
>
> interface CanvasTask {
>
> HTMLCanvasElement createCanvas(unsigned long width, unsigned long height);
> attribute Function onTask;
>
> }
>
> CanvasTask implements HTMLCanvasElement;
>
It looks like you intend CanvasTask to be the global object for the task
script? So it's not a Worker and you don't get anything from
WorkerGlobalScope? That's extremely limiting and also adds a lot of
complexity by introducing a new kind of script global. You really would
want to reuse workers here.
Also, making the HTMLCanvasElement API accessible from non-main threads is
a big no-no. You can't let people do CanvasTask.document.window.whatever
from non-main threads.
Rob
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Received on Sunday, 20 October 2013 07:29:14 UTC