Package com.itextpdf.io.codec
Class TIFFLZWDecoder
java.lang.Object
com.itextpdf.io.codec.TIFFLZWDecoder
A class for performing LZW decoding.
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionvoid
addStringToTable
(byte[] str) 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
void
Initialize the string table.void
writeString
(byte[] str) Write out the string just uncompressed.
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Constructor Details
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TIFFLZWDecoder
public TIFFLZWDecoder(int w, int predictor, int samplesPerPixel)
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Method Details
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decode
public byte[] decode(byte[] data, byte[] uncompData, int h) Method to decode LZW compressed data.- Parameters:
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data
- The compressed data -
uncompData
- Array to return the uncompressed data in -
h
- The number of rows the compressed data contains - Returns:
- The decoded data
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initializeStringTable
public void initializeStringTable()Initialize the string table. -
writeString
public void writeString(byte[] str) Write out the string just uncompressed.- Parameters:
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str
- the byte string for uncompressed write out
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addStringToTable
public void addStringToTable(byte[] oldString, byte newString) Add a new string to the string table.- Parameters:
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oldString
- the byte string at the end of which the new string will be written and which will be added to the string table -
newString
- the byte to be written to the end of the old string
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addStringToTable
public void addStringToTable(byte[] str) Add a new string to the string table.- Parameters:
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str
- the byte string which will be added to the string table
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composeString
public byte[] composeString(byte[] oldString, byte newString) AppendnewString
to the end ofoldString
.- Parameters:
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oldString
- the byte string at the end of which the new string will be written -
newString
- the byte to be written to the end of the old string - Returns:
- the byte string which is the sum of the new string and the old string
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getNextCode
public int getNextCode()
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