1 Zopfli Compression Algorithm is a compression library programmed in C to perform 2 very good, but slow, deflate or zlib compression. 3 4 The basic function to compress data is ZopfliCompress in zopfli.h. Use the 5 ZopfliOptions object to set parameters that affect the speed and compression. 6 Use the ZopfliInitOptions function to place the default values in the 7 ZopfliOptions first. 8 9 ZopfliCompress supports deflate, gzip and zlib output format with a parameter. 10 To support only one individual format, you can instead use ZopfliDeflate in 11 deflate.h, ZopfliZlibCompress in zlib_container.h or ZopfliGzipCompress in 12 gzip_container.h. 13 14 ZopfliDeflate creates a valid deflate stream in memory, see: 15 http://www.ietf.org/rfc/rfc1951.txt 16 ZopfliZlibCompress creates a valid zlib stream in memory, see: 17 http://www.ietf.org/rfc/rfc1950.txt 18 ZopfliGzipCompress creates a valid gzip stream in memory, see: 19 http://www.ietf.org/rfc/rfc1952.txt 20 21 This library can only compress, not decompress. Existing zlib or deflate 22 libraries can decompress the data. 23 24 zopfli_bin.c is separate from the library and contains an example program to 25 create very well compressed gzip files. Currently the makefile builds this 26 program with the library statically linked in. 27 28 To build the binary, use "make". To build the library as a shared Linux library, 29 use "make libzopfli". The source code of Zopfli is under src/zopfli. 30 31 Zopfli Compression Algorithm was created by Lode Vandevenne and Jyrki 32 Alakuijala, based on an algorithm by Jyrki Alakuijala. 33
