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PNG: The Definitive Guide: Source Code
Chapters 13, 14 and 15 of PNG: The Definitive Guide discuss three
cross-platform demo programs that show how to use the libpng reference
library: rpng, rpng2 and wpng. rpng and rpng2 are viewers; the first is a
very simple example that that shows how a standard file-viewer might use
libpng, while the second is designed to process streaming data and shows how
a web browser might be written. wpng is a simple command-line program that
reads binary PPM files (the ``raw'' RGB subset of NetPBM) and converts them
to PNG.
The source code for all three demo programs currently compiles only under
Unix and 32-bit Windows. It has been tested with gcc 2.7.2.3 under Linux and
Solaris and with Microsoft Visual C++ 5.0 under Windows 95. Brief
instructions for compiling the programs are included at the top of the
makefiles; makefile.unx is the Unix version, and makefile.w32 is (you
guessed it!) the version for 32-bit Windows. libpng and zlib are required.
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License
The source code to the demo programs may be used and distributed freely
(even if you didn't buy the book--but feel free to do so at any time),
subject to the terms of the following BSD-like license:
Copyright (c) 1998-1999 Greg Roelofs. All rights reserved.
This software is provided "as is," without warranty of any kind,
express or implied. In no event shall the author or contributors
be held liable for any damages arising in any way from the use of
this software.
Permission is granted to anyone to use this software for any
purpose, including commercial applications, and to alter it and
redistribute it freely, subject to the following restrictions:
1. Redistributions of source code must retain the above
copyright notice, disclaimer, and this list of conditions.
2. Redistributions in binary form must reproduce the above
copyright notice, disclaimer, and this list of conditions in
the documentation and/or other materials provided with the
distribution.
3. All advertising materials mentioning features or use of this
software must display the following acknowledgment:
This product includes software developed by Greg Roelofs
and contributors for the book, "PNG: The Definitive
Guide," published by O'Reilly and Associates.
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http://www.cdrom.com/pub/png/book/sources.html