Package com.lowagie.text.pdf.codec

Class JBIG2SegmentReader

java.lang.Object

com.lowagie.text.pdf.codec.JBIG2SegmentReader

public class JBIG2SegmentReader
extends java.lang.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?

Since:

2.1.5

Nested Class Summary

Nested Classes

Modifier and Type	Class	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	Description
static int	END_OF_FILE
static int	END_OF_PAGE
static int	END_OF_STRIPE
static int	EXTENSION
private java.util.SortedSet	globals
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
private int	number_of_pages
private boolean	number_of_pages_known
static int	PAGE_INFORMATION
private java.util.SortedMap	pages
static int	PATTERN_DICTIONARY
static int	PROFILES
private RandomAccessFileOrArray	ra
private boolean	read
private java.util.SortedMap	segments
private boolean	sequential
static int	SYMBOL_DICTIONARY
static int	TABLES

Constructor Summary

Constructors

Constructor	Description
JBIG2SegmentReader(RandomAccessFileOrArray ra)

Method Summary

Modifier and Type	Method	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()
(package private) void	readFileHeader()
(package private) JBIG2SegmentReader.JBIG2Segment	readHeader()
(package private) void	readSegment(JBIG2SegmentReader.JBIG2Segment s)
java.lang.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

See Also:

Constant Field Values

INTERMEDIATE_TEXT_REGION

public static final int INTERMEDIATE_TEXT_REGION

See Also:

Constant Field Values

IMMEDIATE_TEXT_REGION

public static final int IMMEDIATE_TEXT_REGION

See Also:

Constant Field Values

IMMEDIATE_LOSSLESS_TEXT_REGION

public static final int IMMEDIATE_LOSSLESS_TEXT_REGION

See Also:

Constant Field Values

PATTERN_DICTIONARY

public static final int PATTERN_DICTIONARY

See Also:

Constant Field Values

INTERMEDIATE_HALFTONE_REGION

public static final int INTERMEDIATE_HALFTONE_REGION

See Also:

Constant Field Values

IMMEDIATE_HALFTONE_REGION

public static final int IMMEDIATE_HALFTONE_REGION

See Also:

Constant Field Values

IMMEDIATE_LOSSLESS_HALFTONE_REGION

public static final int IMMEDIATE_LOSSLESS_HALFTONE_REGION

See Also:

Constant Field Values

INTERMEDIATE_GENERIC_REGION

public static final int INTERMEDIATE_GENERIC_REGION

See Also:

Constant Field Values

IMMEDIATE_GENERIC_REGION

public static final int IMMEDIATE_GENERIC_REGION

See Also:

Constant Field Values

IMMEDIATE_LOSSLESS_GENERIC_REGION

public static final int IMMEDIATE_LOSSLESS_GENERIC_REGION

See Also:

Constant Field Values

INTERMEDIATE_GENERIC_REFINEMENT_REGION

public static final int INTERMEDIATE_GENERIC_REFINEMENT_REGION

See Also:

Constant Field Values

IMMEDIATE_GENERIC_REFINEMENT_REGION

public static final int IMMEDIATE_GENERIC_REFINEMENT_REGION

See Also:

Constant Field Values

IMMEDIATE_LOSSLESS_GENERIC_REFINEMENT_REGION

public static final int IMMEDIATE_LOSSLESS_GENERIC_REFINEMENT_REGION

See Also:

Constant Field Values

PAGE_INFORMATION

public static final int PAGE_INFORMATION

See Also:

Constant Field Values

END_OF_PAGE

public static final int END_OF_PAGE

See Also:

Constant Field Values

END_OF_STRIPE

public static final int END_OF_STRIPE

See Also:

Constant Field Values

END_OF_FILE

public static final int END_OF_FILE

See Also:

Constant Field Values

PROFILES

public static final int PROFILES

See Also:

Constant Field Values

TABLES

public static final int TABLES

See Also:

Constant Field Values

EXTENSION

public static final int EXTENSION

See Also:

Constant Field Values

segments

private final java.util.SortedMap segments

pages

private final java.util.SortedMap pages

globals

private final java.util.SortedSet globals

ra

private RandomAccessFileOrArray ra

sequential

private boolean sequential

number_of_pages_known

private boolean number_of_pages_known

number_of_pages

private int number_of_pages

read

private boolean read

Constructor Detail

JBIG2SegmentReader

public JBIG2SegmentReader(RandomAccessFileOrArray ra)
                   throws java.io.IOException

Throws:

java.io.IOException

Method Detail

copyByteArray

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

read

public void read()
          throws java.io.IOException

Throws:

java.io.IOException

readSegment

void readSegment(JBIG2SegmentReader.JBIG2Segment s)
          throws java.io.IOException

Throws:

java.io.IOException

readHeader

JBIG2SegmentReader.JBIG2Segment readHeader()
                                    throws java.io.IOException

Throws:

java.io.IOException

readFileHeader

void readFileHeader()
             throws java.io.IOException

Throws:

java.io.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 java.lang.String toString()

Overrides:

toString in class java.lang.Object