Package 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.

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 final int	END_OF_FILE
static final int	END_OF_PAGE
static final int	END_OF_STRIPE
static final int	EXTENSION
static final int	IMMEDIATE_GENERIC_REFINEMENT_REGION
static final int	IMMEDIATE_GENERIC_REGION
static final int	IMMEDIATE_HALFTONE_REGION
static final int	IMMEDIATE_LOSSLESS_GENERIC_REFINEMENT_REGION
static final int	IMMEDIATE_LOSSLESS_GENERIC_REGION
static final int	IMMEDIATE_LOSSLESS_HALFTONE_REGION
static final int	IMMEDIATE_LOSSLESS_TEXT_REGION
static final int	IMMEDIATE_TEXT_REGION
static final int	INTERMEDIATE_GENERIC_REFINEMENT_REGION
static final int	INTERMEDIATE_GENERIC_REGION
static final int	INTERMEDIATE_HALFTONE_REGION
static final int	INTERMEDIATE_TEXT_REGION
static final int	PAGE_INFORMATION
static final int	PATTERN_DICTIONARY
static final int	PROFILES
static final int	SYMBOL_DICTIONARY
static final 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()
String	toString()

Methods inherited from class java.lang.Object

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

Field Details

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

Constructor Details

Jbig2SegmentReader

             public Jbig2SegmentReader
             (RandomAccessFileOrArray ra)
            

Method Details

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