Package com.itextpdf.text.pdf.codec
Class TIFFLZWDecoder
- java.lang.Object
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- com.itextpdf.text.pdf.codec.TIFFLZWDecoder
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public class TIFFLZWDecoder extends java.lang.Object
A class for performing LZW decoding.
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Field Summary
Fields Modifier and Type Field Description (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
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Constructor Summary
Constructors Constructor Description TIFFLZWDecoder(int w, int predictor, int samplesPerPixel)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method 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)
AppendnewString
to the end ofoldString
.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.
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Field Detail
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stringTable
byte[][] stringTable
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data
byte[] data
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uncompData
byte[] uncompData
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tableIndex
int tableIndex
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bitsToGet
int bitsToGet
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bytePointer
int bytePointer
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bitPointer
int bitPointer
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dstIndex
int dstIndex
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w
int w
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h
int h
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predictor
int predictor
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samplesPerPixel
int samplesPerPixel
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nextData
int nextData
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nextBits
int nextBits
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andTable
int[] andTable
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Method Detail
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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.
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initializeStringTable
public void initializeStringTable()
Initialize the string table.
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writeString
public void writeString(byte[] string)
Write out the string just uncompressed.
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addStringToTable
public void addStringToTable(byte[] oldString, byte newString)
Add a new string to the string table.
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addStringToTable
public void addStringToTable(byte[] string)
Add a new string to the string table.
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composeString
public byte[] composeString(byte[] oldString, byte newString)
AppendnewString
to the end ofoldString
.
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getNextCode
public int getNextCode()
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