Short: Load alpha channel from PNG pictures etc. Author: Andreas Falkenhahn Uploader: Andreas Falkenhahn 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