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