ctions have been
   provided to allow reading and writing of files in JPEG, PNG,
   TIFF, BMP, PNM ,GIF, WEBP and JP2 formats.  These formats were chosen
   for the following reasons:

    - JFIF JPEG is the standard method for lossy compression
      of grayscale and color images.  It is supported natively
      in all browsers, and uses a good open source compression
      library.  Decompression is supported by the rasterizers
      in PS and PDF, for level 2 and above.  It has a progressive
      mode t