Package com.aowagie.text.pdf
Class LZWDecoder
- java.lang.Object
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- com.aowagie.text.pdf.LZWDecoder
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class LZWDecoder 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
nextBits
private int
nextData
private byte[][]
stringTable
private int
tableIndex
private java.io.OutputStream
uncompData
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Constructor Summary
Constructors Constructor Description LZWDecoder()
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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
.void
decode(byte[] data, java.io.OutputStream uncompData)
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 java.io.OutputStream 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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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
public void decode(byte[] data, java.io.OutputStream uncompData)
Method to decode LZW compressed data.- Parameters:
data
- The compressed data.uncompData
- Array to return the uncompressed data in.
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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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