[whatwg] Supporting scanners on the web

[Robert O'Callahan]

On Fri, Sep 27, 2013 at 5:29 PM, Jonas Sicking <jonas at sicking.cc> wrote:

> The most requested ability is to resize images to a particular
> resolution. This is something that can be done using canvas, but not
> for videos or animated images. And currently you can't do it off the
> main thread, which is an issue for larger images.
>

You can actually. You can draw the image to an offscreen <canvas>, scaling
it, and then call toBlob() on the canvas, which is async. Nothing forces
the image drawing and scaling part of that process to be sync.

Rob
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