Get the color of a specific pixel from this texture and store it in a Color object.
If you have drawn anything to this CanvasTexture since it was created you must call
CanvasTexture.update to refresh the array buffer,
otherwise this may return out of date color values, or worse - throw a run-time error as it tries to access an array element that doesn't exist.
The x coordinate of the pixel to get. Must lay within the dimensions of this CanvasTexture and be an integer.
The y coordinate of the pixel to get. Must lay within the dimensions of this CanvasTexture and be an integer.
A Color object to store the pixel values in. If not provided a new Color object will be created.
An object with the red, green, blue and alpha values set in the r, g, b and a properties.