Package com.lowagie.text.pdf
Class LZWDecoder
java.lang.Object
com.lowagie.text.pdf.LZWDecoder
A class for performing LZW decoding.
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Field Summary
FieldsModifier and TypeFieldDescription(package private) int[]
(package private) int
(package private) int
(package private) int
(package private) byte[]
(package private) int
(package private) int
(package private) byte[][]
(package private) int
(package private) OutputStream
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
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
.void
decode
(byte[] data, OutputStream uncompData) Method to decode LZW compressed data.int
void
Initialize the string table.void
writeString
(byte[] string) Write out the string just uncompressed.
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Field Details
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stringTable
byte[][] stringTable -
data
byte[] data -
uncompData
OutputStream uncompData -
tableIndex
int tableIndex -
bitsToGet
int bitsToGet -
bytePointer
int bytePointer -
bitPointer
int bitPointer -
nextData
int nextData -
nextBits
int nextBits -
andTable
int[] andTable
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Constructor Details
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LZWDecoder
public LZWDecoder()
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Method Details
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decode
Method to decode LZW compressed data.- Parameters:
data
- The compressed data.uncompData
- Array to return the uncompressed data in.
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initializeStringTable
public void initializeStringTable()Initialize the string table. -
writeString
public void writeString(byte[] string) Write out the string just uncompressed.- Parameters:
string
- bytes
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addStringToTable
public void addStringToTable(byte[] oldString, byte newString) Add a new string to the string table.- Parameters:
oldString
- old string bytesnewString
- new string bytes
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addStringToTable
public void addStringToTable(byte[] string) Add a new string to the string table.- Parameters:
string
- bytes
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composeString
public byte[] composeString(byte[] oldString, byte newString) AppendnewString
to the end ofoldString
.- Parameters:
oldString
- old string bytesnewString
- new string bytes- Returns:
- byes
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getNextCode
public int getNextCode()
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