June 1999
Intermediate to advanced
340 pages
10h 10m
English
Content preview from PNG: The Definitive Guide
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Chapter 16. Other Libraries and Concluding Remarks
As I mentioned at the beginning of Chapter 13, “Reading PNG Images”, libpng is not the only option for adding PNG support to an application. There are numerous other possibilities, particularly for the Windows platforms; a number of these use libpng themselves.
16.1. Cross-Platform Libraries
In the next two sections, I list roughly two dozen PNG-supporting libraries and toolkits, with particular emphasis on those with the greatest cross-platform support or support for some of the less common platforms. For an up-to-date list of PNG toolkits and related code, please check the Toolkits web page and the Source Code and Libraries page at the PNG home site:
http://www.libpnq.org/pub/pnq/pnqaptk.html http://www.libpng.org/pub/png/pngcode.html
Note that I have not personally tested any of the libraries or toolkits listed here.
ImageMagick
John Cristy's ImageMagick is a C library that provides a uniform interface to a few dozen image formats. It not only includes a standard C API but also has Perl and Python interfaces. It also provides several powerful utilities, including an X-based viewer called display, for which it is probably better known. ImageMagick is freely available in source and binary formats for Unix, VMS, Macintosh, and 32-bit Windows platforms, albeit without the display and animate tools on the Mac. (An X server is required for those two programs on the other platforms.) It uses libpng and zlib for PNG support and may ...
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