The zlib plugin provides an interface for the zlib library.

For more information about zlib see http://www.zlib.net/

Codecs

• gzip — deflate data with a gzip header RFC 1952).
• zlib — deflate data with a zlib header (RFC 1950).
• deflate — raw deflate data (RFC 1951).

Options

• window-bits (integer, 8-15, default 15): The base two logarithm of the maximum window size. The value passed to the decompressor must be greater than or equal to the value passed to the compressor.

Encoder Only

• level (integer, 1-9, default 6): Compression level. 1 will result in the fastest compression while 9 will result in the highest compression ratio.
• mem-level (integer, 1-9, default 8):
• strategy (enumeration, default "default"): Descriptions adapted from the deflateInit2 zlib documentation:
  • default — Use this for normal data.
  • filtered — For data produced by a filter (or predictor). The effect of filtered is to force more Huffman coding and less string matching; it is somewhat intermediate between default and huffman.
  • huffman — Force Huffman encoding only (no string match)
  • rle — Limit match distances to one (run-length encoding)
  • fixed — Prevent the use of dynamic Huffman codes, allowing for a simpler decoder for special applications.

License

The zlib plugin is licensed under the MIT License, and zlib is licensed under the zlib License, a permissive OSI-approved license.