zlib是提供数据压缩用的函式库，由Jean-loup Gailly与Mark Adler所开发，初版0.9版在1995年5月1日发表。zlib使用DEFLATE算法，最初是为libpng函式库所写的，后来普遍为许多软件所使用。-Zlib is the availability of data compression with the library, by Jean-loup Gailly and Mark Adler development, first edition 0.9 edition published in May 1, 1995. Zlib using the DEFLATE algorithm, was originally developed for the libpng type library written, then the widespread as many software used.