[whatwg] Hardware accelerated canvas

Jussi Kalliokoski jussi.kalliokoski at gmail.com
Tue Sep 4 13:26:15 PDT 2012

I'm just wondering if there's a way to detect if the canvas was made with
the purpose of drawing a static image.

On providing a better way for those single shot canvases to make sure that
the image is preserved, I think one way would be to add a complementing
method to toDataURL(), being toBlobURL(). This has the advantage that the
Blob URL could act as a cross-origin resource if non-CORS-enabled resources
were made to draw the canvas, whereas toDataURL() will just throw a
security exception. The Blob URL could still be used to serve an image tag
on the page.


On Tue, Sep 4, 2012 at 11:03 PM, Boris Zbarsky <bzbarsky at mit.edu> wrote:

> On 9/4/12 3:31 PM, Jussi Kalliokoski wrote:
>> Hmm... Is it visible to the page outside getContext() ?
> No.  Why does that matter?
> -Boris

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