ImageData:getPixel
Gets the color of a pixel at a specific position in the image.
Valid x and y values start at 0 and go up to image width and height minus 1. Non-integer values are floored. Prior to 0.10.2, this function does not properly handle non-integer coordinates, and may produce an invalid result when non-integer values are passed. Function Synopsis r, g, b, a = ImageData:getPixel( x, y ) Arguments number x The position of the pixel on the x-axis. number y The position of the pixel