wxPdfLzwDecoder Class Reference

Class representing an LZW decoder. (For internal use only). More...

#include <pdfparser.h>

Public Member Functions
	wxPdfLzwDecoder ()
	Constructor.
virtual	~wxPdfLzwDecoder ()
	Destructor.
int	GetNextCode ()
	Get next code from the encoded stream.
bool	Decode (wxMemoryInputStream *dataIn, wxMemoryOutputStream *dataOut)
	Decode a byte stream.
void	InitializeStringTable ()
	Initialize the string table with initial 256 entries.
void	WriteString (int code)
	Write decoded string associated with code into output buffer.
void	AddStringToTable (int oldCode, char newString)
	Add a new string to the string table.

Detailed Description

Class representing an LZW decoder. (For internal use only).

Decodes streams that use the Lempel-Ziv-Welch (LZW) compression algorithm, commonly used in PDF and TIFF files.

Constructor & Destructor Documentation

wxPdfLzwDecoder()

wxPdfLzwDecoder::wxPdfLzwDecoder

(

)

Constructor.

~wxPdfLzwDecoder()

virtual wxPdfLzwDecoder::~wxPdfLzwDecoder ( )

virtual

Destructor.

Member Function Documentation

AddStringToTable()

void wxPdfLzwDecoder::AddStringToTable	(	int	oldCode,
		char	newString )

Add a new string to the string table.

Parameters

oldCode	The previous code
newString	The new character to append

Decode()

bool wxPdfLzwDecoder::Decode	(	wxMemoryInputStream *	dataIn,
		wxMemoryOutputStream *	dataOut )

Decode a byte stream.

Parameters

dataIn	The encoded input stream
dataOut	The decoded output stream

Returns

true if successful, false otherwise

GetNextCode()

int wxPdfLzwDecoder::GetNextCode

(

)

Get next code from the encoded stream.

Returns

The next LZW code

InitializeStringTable()

void wxPdfLzwDecoder::InitializeStringTable

(

)

Initialize the string table with initial 256 entries.

WriteString()

void wxPdfLzwDecoder::WriteString

(

int

code

)

Write decoded string associated with code into output buffer.

Parameters

code	The code to look up in the string table

---

The documentation for this class was generated from the following file:

• E:/github/wxpdfdoc-current/include/wx/pdfparser.h