com.itextpdf.io.codec

Class Jbig2SegmentReader

java.lang.Object

com.itextpdf.io.codec.Jbig2SegmentReader

public class Jbig2SegmentReader
extends Object

Class to read a JBIG2 file at a basic level: understand all the segments, understand what segments belong to which pages, how many pages there are, what the width and height of each page is, and global segments if there are any. Or: the minimum required to be able to take a normal sequential or random-access organized file, and be able to embed JBIG2 pages as images in a PDF. TODO: the indeterminate-segment-size value of dataLength, else?

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Jbig2SegmentReader.Jbig2Page Inner class that holds information about a JBIG2 page.
static class	Jbig2SegmentReader.Jbig2Segment Inner class that holds information about a JBIG2 segment.

Field Summary

Fields

Modifier and Type	Field and Description
static int	END_OF_FILE
static int	END_OF_PAGE
static int	END_OF_STRIPE
static int	EXTENSION
static int	IMMEDIATE_GENERIC_REFINEMENT_REGION
static int	IMMEDIATE_GENERIC_REGION
static int	IMMEDIATE_HALFTONE_REGION
static int	IMMEDIATE_LOSSLESS_GENERIC_REFINEMENT_REGION
static int	IMMEDIATE_LOSSLESS_GENERIC_REGION
static int	IMMEDIATE_LOSSLESS_HALFTONE_REGION
static int	IMMEDIATE_LOSSLESS_TEXT_REGION
static int	IMMEDIATE_TEXT_REGION
static int	INTERMEDIATE_GENERIC_REFINEMENT_REGION
static int	INTERMEDIATE_GENERIC_REGION
static int	INTERMEDIATE_HALFTONE_REGION
static int	INTERMEDIATE_TEXT_REGION
static int	PAGE_INFORMATION
static int	PATTERN_DICTIONARY
static int	PROFILES
static int	SYMBOL_DICTIONARY
static int	TABLES

Constructor Summary

Constructors

Constructor and Description
Jbig2SegmentReader(RandomAccessFileOrArray ra)

Method Summary

Modifier and Type	Method and Description
static byte[]	copyByteArray(byte[] b)
byte[]	getGlobal(boolean for_embedding)
Jbig2SegmentReader.Jbig2Page	getPage(int page)
int	getPageHeight(int i)
int	getPageWidth(int i)
int	numberOfPages()
void	read()
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

SYMBOL_DICTIONARY

public static final int SYMBOL_DICTIONARY

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Constant Field Values

INTERMEDIATE_TEXT_REGION

public static final int INTERMEDIATE_TEXT_REGION

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IMMEDIATE_TEXT_REGION

public static final int IMMEDIATE_TEXT_REGION

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Constant Field Values

IMMEDIATE_LOSSLESS_TEXT_REGION

public static final int IMMEDIATE_LOSSLESS_TEXT_REGION

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PATTERN_DICTIONARY

public static final int PATTERN_DICTIONARY

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Constant Field Values

INTERMEDIATE_HALFTONE_REGION

public static final int INTERMEDIATE_HALFTONE_REGION

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Constant Field Values

IMMEDIATE_HALFTONE_REGION

public static final int IMMEDIATE_HALFTONE_REGION

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Constant Field Values

IMMEDIATE_LOSSLESS_HALFTONE_REGION

public static final int IMMEDIATE_LOSSLESS_HALFTONE_REGION

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INTERMEDIATE_GENERIC_REGION

public static final int INTERMEDIATE_GENERIC_REGION

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Constant Field Values

IMMEDIATE_GENERIC_REGION

public static final int IMMEDIATE_GENERIC_REGION

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IMMEDIATE_LOSSLESS_GENERIC_REGION

public static final int IMMEDIATE_LOSSLESS_GENERIC_REGION

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Constant Field Values

INTERMEDIATE_GENERIC_REFINEMENT_REGION

public static final int INTERMEDIATE_GENERIC_REFINEMENT_REGION

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IMMEDIATE_GENERIC_REFINEMENT_REGION

public static final int IMMEDIATE_GENERIC_REFINEMENT_REGION

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IMMEDIATE_LOSSLESS_GENERIC_REFINEMENT_REGION

public static final int IMMEDIATE_LOSSLESS_GENERIC_REFINEMENT_REGION

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Constant Field Values

PAGE_INFORMATION

public static final int PAGE_INFORMATION

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Constant Field Values

END_OF_PAGE

public static final int END_OF_PAGE

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Constant Field Values

END_OF_STRIPE

public static final int END_OF_STRIPE

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Constant Field Values

END_OF_FILE

public static final int END_OF_FILE

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PROFILES

public static final int PROFILES

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TABLES

public static final int TABLES

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Constant Field Values

EXTENSION

public static final int EXTENSION

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Constant Field Values

Constructor Detail

Jbig2SegmentReader

public Jbig2SegmentReader(RandomAccessFileOrArray ra)
                   throws IOException

Throws:

IOException

Method Detail

copyByteArray

public static byte[] copyByteArray(byte[] b)

read

public void read()
          throws IOException

Throws:

IOException

numberOfPages

public int numberOfPages()

getPageHeight

public int getPageHeight(int i)

getPageWidth

public int getPageWidth(int i)

getPage

public Jbig2SegmentReader.Jbig2Page getPage(int page)

getGlobal

public byte[] getGlobal(boolean for_embedding)

toString

public String toString()

Overrides:

toString in class Object