eas that may have dimensions
    less than the image width and height.  All the tiles
    in an image have the same size, and the tile width and length must each
    be a multiple of 16 pixels.  Tiles are ordered left-to-right and
    top-to-bottom in an image.  As for scanlines, samples can be packed
    contiguously or separately.  When separated, all the tiles for a sample
    are colocated in the file.  That is, all the tiles for sample 0 appear
    before the tiles for sample 1, etc.
  </p>
  <p>
    T