[whatwg] [canvas] request for {create, get, put}ImageDataHD and ctx.backingStorePixelRatio

[Boris Zbarsky]

On 3/20/12 3:00 PM, James Robinson wrote:
> If we are adding new APIs for manipulating the backing directly, can we
> make them asynchronous? This would allow for many optimization
> opportunities that are currently difficult or impossible.

You mean like not blocking the world on the readback?

That would indeed be very nice.  The question is what happens if drawing 
happens after the getImageData call...  Or for that matter after the 
putImageData call (though I suspect there's less need for putImageData 
to be async).

-Boris