C# Class Moxie.PngEncoder.DeflaterEngine

Low level compression engine for deflate algorithm which uses a 32K sliding window with secondary compression from Huffman/Shannon-Fano codes.

Inheritance: DeflaterConstants

Public Methods

Method	Description
Deflate ( bool flush, bool finish ) : bool	Deflate drives actual compression of data
DeflaterEngine ( DeflaterPending pending ) : System	Construct instance with pending buffer
FillWindow ( ) : void	Fill the window
NeedsInput ( ) : bool	Determines if more input is needed.
Reset ( ) : void	Reset internal state
ResetAdler ( ) : void	Reset Adler checksum
SetDictionary ( byte buffer, int offset, int length ) : void	Set compression dictionary
SetInput ( byte buffer, int offset, int count ) : void	Sets input data to be deflated. Should only be called when `NeedsInput()` returns true
SetLevel ( int level ) : void	Set the deflate level (0-9)

Method	Description
DeflateFast ( bool flush, bool finish ) : bool
DeflateSlow ( bool flush, bool finish ) : bool
DeflateStored ( bool flush, bool finish ) : bool
FindLongestMatch ( int curMatch ) : bool	Find the best (longest) string in the window matching the string starting at strstart. Preconditions: `strstart + MAX_MATCH <= window.length.`
InsertString ( ) : int	Inserts the current string in the head hash and returns the previous value for this hash.
SlideWindow ( ) : void
UpdateHash ( ) : void

Deflate drives actual compression of data

public Deflate ( bool flush, bool finish ) : bool
flush	bool	True to flush input buffers
finish	bool	Finish deflation with the current input.
return	bool

Construct instance with pending buffer

public DeflaterEngine ( DeflaterPending pending ) : System
pending	DeflaterPending	/// Pending buffer to use ///
return	System

Fill the window

public FillWindow ( ) : void
return	void

Determines if more input is needed.

public NeedsInput ( ) : bool
return	bool

Reset internal state

public Reset ( ) : void
return	void

Reset Adler checksum

public ResetAdler ( ) : void
return	void

Set compression dictionary

public SetDictionary ( byte buffer, int offset, int length ) : void
buffer	byte	The buffer containing the dictionary data
offset	int	The offset in the buffer for the first byte of data
length	int	The length of the dictionary data.
return	void

Sets input data to be deflated. Should only be called when NeedsInput() returns true

public SetInput ( byte buffer, int offset, int count ) : void
buffer	byte	The buffer containing input data.
offset	int	The offset of the first byte of data.
count	int	The number of bytes of data to use as input.
return	void

Set the deflate level (0-9)

public SetLevel ( int level ) : void
level	int	The value to set the level to.
return	void