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- 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.
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