Class TIFFFaxDecoder

java.lang.Object

com.aowagie.text.pdf.codec.TIFFFaxDecoder

public class TIFFFaxDecoder
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
private static short[]	additionalMakeup
private int	bitPointer
private static short[]	black
private int	bytePointer
private int	changingElemSize
private int	compression
private int[]	currChangingElems
private byte[]	data
private int	fillBits
private final int	fillOrder
private static byte[]	flipTable
private final int	h
private static short[]	initBlack
private int	lastChangingElement
private int	oneD
private int[]	prevChangingElems
private static int[]	table1
private static int[]	table2
private static short[]	twoBitBlack
private static byte[]	twoDCodes
private int	uncompressedMode
private final int	w
private static short[]	white

Constructor Summary

Constructors

Constructor	Description
TIFFFaxDecoder(int fillOrder, int w, int h)

Method Summary

Modifier and Type	Method	Description
private boolean	advancePointer()
(package private) void	decode1D(byte[] buffer, byte[] compData, int startX, int height)
(package private) void	decode2D(byte[] buffer, byte[] compData, int startX, int height, long tiffT4Options)
private int	decodeBlackCodeWord()
private void	decodeNextScanline(byte[] buffer, int lineOffset, int bitOffset)
(package private) void	decodeT6(byte[] buffer, byte[] compData, int startX, int height, long tiffT6Options)
private int	decodeWhiteCodeWord()
private void	getNextChangingElement(int a0, boolean isWhite, int[] ret)
private int	nextLesserThan8Bits(int bitsToGet)
private int	nextNBits(int bitsToGet)
private int	readEOL(boolean isFirstEOL)
static void	reverseBits(byte[] b)	Reverses the bits in the array
private void	setToBlack(byte[] buffer, int lineOffset, int bitOffset, int numBits)
private void	updatePointer(int bitsToMoveBack)

Methods inherited from class Object

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

Field Details

bitPointer

private int bitPointer

bytePointer

private int bytePointer

data

private byte[] data

w

private final int w

h

private final int h

fillOrder

private final int fillOrder

changingElemSize

private int changingElemSize

prevChangingElems

private int[] prevChangingElems

currChangingElems

private int[] currChangingElems

lastChangingElement

private int lastChangingElement

compression

private int compression

uncompressedMode

private int uncompressedMode

fillBits

private int fillBits

oneD

private int oneD

table1

private static int[] table1

table2

private static int[] table2

flipTable

private static byte[] flipTable

white

private static short[] white

additionalMakeup

private static short[] additionalMakeup

initBlack

private static short[] initBlack

twoBitBlack

private static short[] twoBitBlack

black

private static short[] black

twoDCodes

private static byte[] twoDCodes

Constructor Details

TIFFFaxDecoder

TIFFFaxDecoder(int fillOrder,
 int w,
 int h)

Parameters:

fillOrder - The fill order of the compressed data bytes.

w -

h -

Method Details

reverseBits

public static void reverseBits(byte[] b)

Reverses the bits in the array

Parameters:

b - the bits to reverse

Since:

2.0.7

decode1D

void decode1D(byte[] buffer,
 byte[] compData,
 int startX,
 int height)

decodeNextScanline

private void decodeNextScanline(byte[] buffer,
 int lineOffset,
 int bitOffset)

decode2D

void decode2D(byte[] buffer,
 byte[] compData,
 int startX,
 int height,
 long tiffT4Options)

decodeT6

void decodeT6(byte[] buffer,
 byte[] compData,
 int startX,
 int height,
 long tiffT6Options)

setToBlack

private void setToBlack(byte[] buffer,
 int lineOffset,
 int bitOffset,
 int numBits)

decodeWhiteCodeWord

private int decodeWhiteCodeWord()

decodeBlackCodeWord

private int decodeBlackCodeWord()

readEOL

private int readEOL(boolean isFirstEOL)

getNextChangingElement

private void getNextChangingElement(int a0,
 boolean isWhite,
 int[] ret)

nextNBits

private int nextNBits(int bitsToGet)

nextLesserThan8Bits

private int nextLesserThan8Bits(int bitsToGet)

updatePointer

private void updatePointer(int bitsToMoveBack)

advancePointer

private boolean advancePointer()