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

javascript html getimagedata domexception
flerngobot picture flerngobot · Apr 24, 2012 · Viewed 9.2k times · Source

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!

Answer

flerngobot picture flerngobot · Apr 27, 2012

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)

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