libpng by Glenn Randers-Pehrson / Andreas Eric Dilger / Guy Eric Schalnat
cgilib by Martin Schulze
zlib by Jean-loup Gailly and Mark Adler
libpng by Glenn Randers-Pehrson / Andreas Eric Dilger / Guy Eric Schalnat
cgilib by Martin Schulze
zlib by Jean-loup Gailly and Mark Adler