Short:        PNG lossless optimizer (reduces filesize)
Author:       Cosmin Truta, Morphos port by Fabrizio "Lanch" Bartoloni
Uploader:     lanch tiscali it (Fabrizio Bartoloni)
Type:         gfx/misc
Version:      0.5.5
Replaces:     gfx/misc/optipng-mos.lha
Architecture: ppc-morphos

OptiPNG   is a PNG optimizer that recompresses the image files to a smaller size, without losing any information.   
The idea has been inspired from   pngcrush  ( http://pmt.sourceforge.net/pngcrush ), and is explained in detail in
 the PNG-Tech article " A guide to PNG optimization ". The implementation is carried forward in OptiPNG, which
  offers a faster execution per trial, and a wider search space.   

Note from the author of the porting: For pictures <8 bits is strongly advised to preprocess them with PngRewrite
 to achive best results. This version didn't compile out of the box because of a silly "cc" defined as default
 compiler instead of "gcc" in lib/zlib/Makefile, changing it has been enough to accomplish the task anyway.


OptiPNG - Revision history (changes since previous Aminet release)
==========================

Legend
------
++ Added or improved feature that might affect compression ratio
   or speed.
 + Added or improved feature.
 - Removed feature.
 * Other modification (e.g. architectural improvements).
 ! Fixed bug.
!! Fixed dangerous bug that might cause accidental data loss.


Version 0.5.5   28-jan-2007
-------------
 + Upgraded libpng to version 1.2.15-optipng [private]
++ Used a previously-missed RGB-to-palette reduction opportunity
   for images containing 256 distinct colors.
   (Thanks to Joachim Kluge for the report.)
!! Fixed conversion of bKGD info during rgb-to-palette reductions.
   (Thanks to Matthew Fearnley for the report.)
 ! Fixed pre-computation of iterations.
   (Thanks to Matthew Fearnley for the report.)
 ! Eliminated a false alarm when processing RGB images with tRNS
   in Unix-secure mode.  (Thanks to Till Mass for the report, and
   thanks to Nelson A. de Oliveira for the fix.)
 ! Fixed behavior of -out and -dir when changing interlacing.
   (Thanks to Martin Packman for the report.)
 ! Fixed behavior of "-dir [DRIVE]:" on Windows.


Version 0.5.4   11-aug-2006
-------------
 + Added user options -out and -dir, to specify the name of
   the output file or directory.
   (Thanks to Alexander Lucas for the suggestion.)
 * Added support for builds based on the system-supplied libpng.
   (Thanks to Nelson A. de Oliveira for the valuable help.)


Version 0.5.3   23-jul-2006
-------------
 + Upgraded libpng to version 1.2.12-optipng [private]
 + Implemented basic support for TIFF (grayscale, RGB and RGBA,
   uncompressed).
++ Avoided the redundant trial when the search space is singular
   (e.g. when running "optipng -o1 example.tif").
 + Prevented accidental file corruption when using option "-log".
 ! Fixed (again) a small typo in the online help.


Version 0.5.2    7-may-2006
-------------
 + Improved handling of inexact PNM-to-PNG conversions.
 ! Fixed a typo that was breaking the build on some Unix platforms.
   (Thanks to Aaron Reitz for the report.)


Version 0.5.1   30-apr-2006
-------------
++ Implemented bit depth reduction for palette images.
 + Upgraded libpng to version 1.2.10-optipng [private]
 + Improved the BMP support.
 + Added a Unix man page.
   (Thanks to Nelson A. de Oliveira for the contribution.)
 + Allowed abbreviation of command-line options.
 + Changed user option -log to accept a file name as an argument.
 * Changed user option -no to -simulate.
 ! Fixed an error in handling .bak files on Unix.
   (Thanks to Adam Szojda and Nelson A. de Oliveira for the report.)
 ! Fixed a small typo in the help screen.
   (Thanks to A. Costa and Nelson A. de Oliveira for the report.)
 + Added the GUIDE and THANKS documents.
 * Converted some text document files to HTML.

 Morphos conversion by Fabrizio "Lanch" Bartoloni (lanch@tiscali.it)