com.itextpdf.text.pdf.codec

Class TIFFLZWDecoder

java.lang.Object

com.itextpdf.text.pdf.codec.TIFFLZWDecoder

public class TIFFLZWDecoder
extends Object

A class for performing LZW decoding.

Constructor Summary

Constructors

Constructor and Description
TIFFLZWDecoder(int w, int predictor, int samplesPerPixel)

Method Summary

Modifier and Type	Method and Description
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

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()