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    ANNOUNCE      =>  Announcement of this version, with recent changes
    AUTHORS       =>  List of contributing authors
    CHANGES       =>  Description of changes between libpng versions
    INSTALL       =>  Instructions to install libpng
    LICENSE       =>  License to use and redistribute libpng
    README        =>  This file
    TODO          =>  Things not implemented in the current library
    TRADEMARK     =>  Trademark information
    example.c     =>  Example code for using libpng functions
    libpng.3      =>  Manual page for libpng (includes libpng-manual.txt)
    libpng-manual.txt  =>  Description of libpng and its functions
    libpngpf.3    =>  Manual page for libpng's private functions (deprecated)
    png.5         =>  Manual page for the PNG format
    png.c         =>  Basic interface functions common to library
    png.h         =>  Library function and interface declarations (public)
    pngpriv.h     =>  Library function and interface declarations (private)
    pngconf.h     =>  System specific library configuration (public)
    pngstruct.h   =>  png_struct declaration (private)
    pnginfo.h     =>  png_info struct declaration (private)
    pngdebug.h    =>  debugging macros (private)
    pngerror.c    =>  Error/warning message I/O functions
    pngget.c      =>  Functions for retrieving info from struct
    pngmem.c      =>  Memory handling functions
    pngbar.png    =>  PNG logo, 88x31
    pngnow.png    =>  PNG logo, 98x31
    pngpread.c    =>  Progressive reading functions
    pngread.c     =>  Read data/helper high-level functions
    pngrio.c      =>  Lowest-level data read I/O functions
    pngrtran.c    =>  Read data transformation functions
    pngrutil.c    =>  Read data utility functions
    pngset.c      =>  Functions for storing data into the info_struct
    pngtest.c     =>  Library test program
    pngtest.png   =>  Library test sample image
    pngtrans.c    =>  Common data transformation functions
    pngwio.c      =>  Lowest-level write I/O functions
    pngwrite.c    =>  High-level write functions
    pngwtran.c    =>  Write data transformations
    pngwutil.c    =>  Write utility functions
    arm/          =>  Optimized code for ARM Neon
    intel/        =>  Optimized code for INTEL SSE2
    loongarch/    =>  Optimized code for LoongArch LSX
    mips/         =>  Optimized code for MIPS MSA and MIPS MMI
    powerpc/      =>  Optimized code for PowerPC VSX
    ci/           =>  Scripts for continuous integration
    contrib/      =>  External contributions
        arm-neon/     =>  Optimized code for the ARM-NEON platform
        mips-msa/     =>  Optimized code for the MIPS-MSA platform
        powerpc-vsx/  =>  Optimized code for the POWERPC-VSX platform
        examples/     =>  Examples of libpng usage
        gregbook/     =>  Source code for PNG reading and writing, from
                          "PNG: The Definitive Guide" by Greg Roelofs,
                          O'Reilly, 1999
        libtests/     =>  Test programs
        pngexif/      =>  Program to inspect the EXIF information in PNG files
        pngminim/     =>  Minimal decoder, encoder, and progressive decoder
                          programs demonstrating the use of pngusr.dfa
        pngminus/     =>  Simple pnm2png and png2pnm programs
        pngsuite/     =>  Test images
        testpngs/     =>  Test images
        tools/        =>  Various tools
        visupng/      =>  VisualPng, a Windows viewer for PNG images
    projects/     =>  Project files and workspaces for various IDEs
        owatcom/      =>  OpenWatcom project
        visualc71/    =>  Microsoft Visual C++ 7.1 workspace
        vstudio/      =>  Microsoft Visual Studio workspace
    scripts/      =>  Scripts and makefiles for building libpng
                      (see scripts/README.txt for the complete list)
    tests/        =>  Test scripts

Good luck, and happy coding!

 * Cosmin Truta (current maintainer, since 2018)
 * Glenn Randers-Pehrson (former maintainer, 1998-2018)
 * Andreas Eric Dilger (former maintainer, 1996-1997)
 * Guy Eric Schalnat (original author and former maintainer, 1995-1996)
   (formerly of Group 42, Inc.)