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A library of functions for manipulating PNG image format files

The libpng package contains a library of functions for creating and manipulating PNG (Portable Network Graphics) image format files. PNG is a bit-mapped graphics format similar to the GIF format. PNG was created to replace the GIF format, since GIF uses a patented data compression algorithm.

Libpng should be installed if you need to manipulate PNG format image files.

Package version:1.2.49


README for libpng version 1.2.49 - March 29, 2012 (shared library 12.0)
See the note about version numbers near the top of png.h

See INSTALL for instructions on how to install libpng.

Libpng comes in several distribution formats.  Get libpng-*.tar.gz,
libpng-*.tar.xz, or libpng-*.tar.bz2 if you want UNIX-style line
endings in the text files, or lpng*.7z or lpng*.zip if you want DOS-style
line en


PNG(5)                                                        PNG(5)

       png - Portable Network Graphics (PNG) format

       PNG  (Portable Network Graphics) is an extensible file format
       for the lossless, portable, well-compressed storage of raster
       images.  PNG  provides  a patent-free replacement for GIF and
       can also replace many common  uses  of  TIFF


#if 0
CHANGES - changes for libpng

version 0.2
  added reader into png.h
  fixed small problems in stub file

version 0.3
  added pull reader
  split up pngwrite.c to several files
  added pnglib.txt
  added example.c
  cleaned up writer, adding a few new transformations
  fixed some bugs in writer
  interfaced with zlib 0.5
  added K&R support
  added check for 64 KB blocks for 16 bit machines



TODO - list of things to do for libpng:

Final bug fixes.
Improve API by hiding the png_struct and p


This copy of the libpng notices is provided for your convenience.  In case of
any discrepancy betwe

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