[whatwg] HTMLCanvasElement.toFile()

Jonas Sicking jonas at sicking.cc
Thu Jan 7 15:15:42 PST 2010

On Thu, Jan 7, 2010 at 3:14 PM, Jonas Sicking <jonas at sicking.cc> wrote:
> On Thu, Jan 7, 2010 at 2:27 PM, João Eiras <joaoe at opera.com> wrote:
>>>> This function takes the same arguments as toDataURL(), plus an
>>>> additional 'name' argument. It produces the same result as
>>>> toDataURL(), except that it returns the result as a File object rather
>>>> than as a data-url encoded string. This can then be directly sent
>>>> using XMLHttpRequest.
>>> I think it would make more sense to have an actual type for binary data
>>> (for example along the lines of my proposal on public-script-coord and
>>> es-discuss) and enable getting one from <canvas> and sending via XHR.
>> How about just overloading xhr.send() to handle a <canvas> element ?
> I'm reluctant to overload the meaning of sending an Element object.
> When a Document is passed to xhr.send() we already serialize that
> document into markup, it seems likely to me that in the future we'll
> want to do the same thing for Elements.

Additionally, this doesn't allow specifying the encoding type, such as
JPEG or PNG, or encoding parameters, such as JPEG quality.

/ Jonas

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