[whatwg] getImageData/putImageData comments
bzbarsky at MIT.EDU
Fri Jun 12 11:47:14 PDT 2009
Ian Hickson wrote:
> On Mon, 1 Jun 2009, Boris Zbarsky wrote:
>> 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...
> It's not that hard, it's an extra four or five lines of code to fill in
> multiple pixels in a square (two nested for-loops and an expression or two
> to work out what the limit is). Compared to the maths such code would be
> doing anyway, this is trivial stuff.
The hard part is realizing you have to do it...
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