[whatwg] getImageData/putImageData comments
bzbarsky at MIT.EDU
Mon Jun 1 07:00:49 PDT 2009
Boris Zbarsky wrote:
> The other use case is doing createImageData, followed by filling in the
> pixels, followed by putImageData.
I just saw the example in the spec that does just this, but bases the
values it puts in on numbers it gets out of getImageData. For that case
you would of course want a blank imagedata that matches what
getImageData hands out.
I still think that we need a better "I have some externally-derived
pixel data I'd like to just stick in this canvas" API here. fillRect()
has terrible performance characteristics (as has been brought up many
times before), and the current imagedata design makes it very difficult
to use it correctly for this purpose...
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