com.lowagie.text.pdf.codec
Class TIFFLZWDecoder

java.lang.Object
  com.lowagie.text.pdf.codec.TIFFLZWDecoder

public class TIFFLZWDecoder
extends Object

A class for performing LZW decoding.

Field Summary

(package private) int[]	andTable
(package private) int	bitPointer
(package private) int	bitsToGet
(package private) int	bytePointer
(package private) byte[]	data
(package private) int	dstIndex
(package private) int	h
(package private) int	nextBits
(package private) int	nextData
(package private) int	predictor
(package private) int	samplesPerPixel
(package private) byte[][]	stringTable
(package private) int	tableIndex
(package private) byte[]	uncompData
(package private) int	w

Constructor Summary

TIFFLZWDecoder(int w, int predictor, int samplesPerPixel)

Method Summary

void	addStringToTable(byte[] string) Add a new string to the string table.
void	addStringToTable(byte[] oldString, byte newString) Add a new string to the string table.
byte[]	composeString(byte[] oldString, byte newString) Append newString to the end of oldString.
byte[]	decode(byte[] data, byte[] uncompData, int h) Method to decode LZW compressed data.
int	getNextCode()
void	initializeStringTable() Initialize the string table.
void	writeString(byte[] string) Write out the string just uncompressed.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

stringTable

byte[][] stringTable

data

byte[] data

uncompData

byte[] uncompData

tableIndex

int tableIndex

bitsToGet

int bitsToGet

bytePointer

int bytePointer

bitPointer

int bitPointer

dstIndex

int dstIndex

w

int w

h

int h

predictor

int predictor

samplesPerPixel

int samplesPerPixel

nextData

int nextData

nextBits

int nextBits

andTable

int[] andTable

Constructor Detail

TIFFLZWDecoder

public TIFFLZWDecoder(int w,
                      int predictor,
                      int samplesPerPixel)

Method Detail

decode

public byte[] decode(byte[] data,
                     byte[] uncompData,
                     int h)

Method to decode LZW compressed data.

Parameters:

data - The compressed data.

uncompData - Array to return the uncompressed data in.

h - The number of rows the compressed data contains.

initializeStringTable

public void initializeStringTable()

Initialize the string table.

writeString

public void writeString(byte[] string)

Write out the string just uncompressed.

addStringToTable

public void addStringToTable(byte[] oldString,
                             byte newString)

Add a new string to the string table.

addStringToTable

public void addStringToTable(byte[] string)

Add a new string to the string table.

composeString

public byte[] composeString(byte[] oldString,
                            byte newString)

Append newString to the end of oldString.

getNextCode

public int getNextCode()