CanvasData type

[Chadtech]

Its really performant to turn canvas data into a 2D JavaScript array of rows and columns of pixels. Its unfortunately less performant to turn a 2D JavaScript array into an Elm list or a JavaScript list.

Perhaps there could be type CanvasData. and functions like `transform : Position -> (Color -> Color)

transformPixel : Position -> (Color -> Color) -> CanvasData

fromData : CanvasData -> Size -> Canvas

type alias Color = (Int, Int, Int, Int)

[bcb]

I would also like this