public MemoryImageSource(int w, int h, int pix[], int off, int scan)
public MemoryImageSource(int w, int h, ColorModel cm, byte[] pix, int off, int scan)
    public MemoryImageSource(int w, int h,			     int pix[], int off, int scan)    {	this ( w, h, ColorModel.getRGBdefault(), pix, off, scan, null);	}