[whatwg] ArrayBuffer and the structured clone algorithm

Tab Atkins Jr. jackalmage at gmail.com
Tue Feb 1 11:08:25 PST 2011

On Tue, Feb 1, 2011 at 10:04 AM, Anne van Kesteren <annevk at opera.com> wrote:
> On Tue, 01 Feb 2011 18:36:19 +0100, Boris Zbarsky <bzbarsky at mit.edu> wrote:
>> On 2/1/11 5:19 AM, Simon Pieters wrote:
>>> While you're discussing efficient handoff of ArrayBuffer, do you also
>>> keep in mind efficient handoff of other objects (e.g. ImageData) as
>>> discussed in this thread?:
>>> http://lists.whatwg.org/pipermail/whatwg-whatwg.org/2011-January/029885.html
>> For what it's worth, in Gecko that's the same thing, since imagedata is
>> just a typed array in our implementation.
> ImageData.data you mean? I wonder if we can still remove CanvasPixelArray.

Only if the out-of-bounds behavior for entries in Typed Arrays matches
the current clamping behavior for CanvasPixelArray.  I don't see any
explicit indication of what should be done in the Typed Array spec,
which I suppose means that they're relying on WebIDL's coercion algos
to keep things in-range for the given view.  WebIDL has the wrong
behavior here right now (it wraps), though I think heycan is receptive
to changing it.


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