
OptiPNG-supporting libraries
============================


IMPORTANT NOTICE
----------------
  OptiPNG uses MODIFIED versions of zlib and libpng, which are
  NOT SUPPORTED by their authors.
  If you have comments, complaints or bug reports regarding these
  particular versions, you may use the OptiPNG support channels.
  Please DO NOT send such reports to the authors of these libraries!
  (You may send them compliments, though.)


Library list
------------

libpng
  * authors: Glenn Randers-Pehrson and the PNG Development Group
  * version: 1.4.5-optipng (altered version, derived from 1.4.5)
  * patch:   libpng/libpng-1.4.5-optipng.diff
  * license: the libpng license (zlib-like); see libpng/LICENSE

pngxtern
  * author:  Cosmin Truta
  * version: 0.6.5
  * acknowledgements:
    - BMP read support derived from bmp2png by MIYASAKA Masaru
    - GIF read support derived from giftopnm by David Koblas
    - PNM support based on pnmio by Cosmin Truta
    - TIFF read support based on minitiff by Cosmin Truta
  * license: the libpng license (zlib-like); see libpng/LICENSE

zlib
  * authors: Jean-loup Gailly and Mark Adler
  * version: 1.2.5-optipng (altered version, derived from 1.2.5)
  * patch:   zlib/zlib-1.2.5-optipng.diff
  * license: the zlib license; see zlib/README
