Short:        Load alpha channel from PNG pictures etc.
Author:       Andreas Falkenhahn <andreas@airsoftsoftwair.de>
Uploader:     Andreas Falkenhahn <andreas airsoftsoftwair de>
Type:         util/libs
Version:      2.0
Replaces:     util/libs/pngalpha_lib.lha
Requires:     68020
Architecture: m68k-amigaos >= 3.0

pngalpha.library
================

This library can be used on to extract alpha channel information out of PNG
pictures and you can use it to save RGB arrays as PNG pictures (optionally with
alpha channel).
MorphOS, AROS and AmigaOS4 all support alpha channel extraction through the
picture.datatype. On classic Amigas, however, the picture.datatype still does
not support alpha channel handling which is the reason why I have created this
library.

pngalpha.library uses libpng 1.2.8 and zlib 1.2.3.


Copyright
=========

libpng version 1.2.8 - December 3, 2004
Copyright (c) 1998-2004 Glenn Randers-Pehrson
(Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger)
(Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.)

zlib version 1.2.3 (C) 1995-2004 Jean-loup Gailly and Mark Adler

pngalpha.library was compiled by Andreas Falkenhahn. Please contact me with
any questions you may have at andreas@airsoftsoftwair.de. The source code
is available on request but it is really just a front-end for libpng. Nothing
interesting.


History
=======

2.0 (12-05-06)
- added glue code for OS4
- added support for saving RGB data as PNG picture

1.0 (19-11-05)
- initial release