| Zopfli Compression Algorithm is a compression library programmed in C to perform |
| very good, but slow, deflate or zlib compression. |
| |
| The basic function to compress data is ZopfliCompress in zopfli.h. Use the |
| ZopfliOptions object to set parameters that affect the speed and compression. |
| Use the ZopfliInitOptions function to place the default values in the |
| ZopfliOptions first. |
| |
| ZopfliCompress supports deflate, gzip and zlib output format with a parameter. |
| To support only one individual format, you can instead use ZopfliDeflate in |
| deflate.h, ZopfliZlibCompress in zlib_container.h or ZopfliGzipCompress in |
| gzip_container.h. |
| |
| ZopfliDeflate creates a valid deflate stream in memory, see: |
| http://www.ietf.org/rfc/rfc1951.txt |
| ZopfliZlibCompress creates a valid zlib stream in memory, see: |
| http://www.ietf.org/rfc/rfc1950.txt |
| ZopfliGzipCompress creates a valid gzip stream in memory, see: |
| http://www.ietf.org/rfc/rfc1952.txt |
| |
| This library can only compress, not decompress. Existing zlib or deflate |
| libraries can decompress the data. |
| |
| zopfli_bin.c is separate from the library and contains an example program to |
| create very well compressed gzip files. Currently the makefile builds this |
| program with the library statically linked in. |
| |
| The source code of Zopfli is under src/zopfli. Build instructions: |
| |
| To build zopfli, compile all .c source files under src/zopfli to a single binary |
| with C, and link to the standard C math library, e.g.: |
| gcc src/zopfli/*.c -O2 -W -Wall -Wextra -Wno-unused-function -ansi -pedantic -lm -o zopfli |
| |
| A makefile is provided as well, but only for linux. Use "make" to build the |
| binary, "make libzopfli" to build it as a shared library. For other platforms, |
| please use the build instructions above instead. |
| |
| Zopfli Compression Algorithm was created by Lode Vandevenne and Jyrki |
| Alakuijala, based on an algorithm by Jyrki Alakuijala. |
