ould normally
    encounter.  Image data is, by default, returned as ABGR
    pixels packed into 32-bit words (8 bits per sample).  Rectangular
    rasters can be read or data can be intercepted at an intermediate
    level and packed into memory in a format more suitable to the
    application.
    The library handles all the details of the format of data stored on
    disk and, in most cases, if any colorspace conversions are required:
    bilevel to RGB, greyscale to RGB, CMYK to RGB, YCbCr to RGB, 16-bi