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javascripthtmlgetimagedatadomexception

getImageData causes "Uncaught Error: NOT_SUPPORTED_ERR: DOM Exception 9"

I'm trying to get a feel for some image manipulation in HTML5. I am finding that when I try and use the getImageData method I get this JS exception thrown. I am using Chrome and running on localhost.

Thanks!

Solution

  • Okay figured out what the problem was. All I have to say is "derp". I was using 

    getImageData(x, x)

    but the way I was intending to use this requires 4 arguments

    getImageData(x,x,x,x)