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