nderlying codec.  You need
      to download libwebp.  See webpio.c.

    - JP2 (jpeg2000) is a wavelet encoding method, that has clear
      advantages over jpeg in compression and quality (especially when
      the image has sharp edges, such as scanned documents), but is
      only slowly growing in acceptance.  For it to be widely supported,
      it will require support on a major browser (as with webp).
      Leptonica provides an interface through openjpeg into the underlying
      codec.  You need t