copy(src, *opts)
Instance Public methods
Copies a region from the image called source to the image called
destination, possibly with pixel zooming and/or subsampling. If no options
are specified, this method copies the whole of source into destination,
starting at coordinates (0,0) in destination. The following options may be
specified:
:from [x1, y1, x2, y2] Specifies a rectangular sub-region of the source
image to be copied. (x1,y1) and (x2,y2) specify diagonally opposite corner