- Dart
- dart:io
- ZLibEncoder class
Constructors
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ZLibEncoder({bool gzip: false, int level: ZLibOption.defaultLevel, int windowBits: ZLibOption.defaultWindowBits, int memLevel: ZLibOption.defaultMemLevel, int strategy: ZLibOption.strategyDefault, List<int> dictionary, bool raw: false })
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Properties
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dictionary
→ List<int>
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Initial compression dictionary. [...]
final
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gzip
→ bool
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When true,
GZip frames will be added to the compressed data.
final
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level
→ int
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The compression-level can be set in the range of
-1..9, with 6 being
the default compression level. Levels above 6 will have higher
compression rates at the cost of more CPU and memory usage. Levels below
6 will use less CPU and memory at the cost of lower compression rates.
final
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memLevel
→ int
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Specifies how much memory should be allocated for the internal compression
state.
1 uses minimum memory but is slow and reduces compression ratio;
9 uses maximum memory for optimal speed. The default value is 8. [...]
final
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raw
→ bool
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When true, deflate generates raw data with no zlib header or trailer, and
will not compute an adler32 check value
final
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strategy
→ int
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Tunes the compression algorithm. Use the value
ZLibOption.strategyDefault for normal data,
ZLibOption.strategyFiltered for data produced by a filter
(or predictor), ZLibOption.strategyHuffmanOnly to force Huffman
encoding only (no string match), or ZLibOption.strategyRle to limit
match distances to one (run-length encoding).
final
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windowBits
→ int
-
Base two logarithm of the window size (the size of the history buffer). It
should be in the range
8..15. Larger values result in better compression
at the expense of memory usage. The default value is 15
final
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hashCode
→ int
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The hash code for this object. [...]
read-only, inherited
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runtimeType
→ Type
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A representation of the runtime type of the object.
read-only, inherited