Class TIFFFaxDecompressor

java.lang.Object

com.github.jaiimageio.plugins.tiff.TIFFDecompressor

com.github.jaiimageio.impl.plugins.tiff.TIFFFaxDecompressor

public class TIFFFaxDecompressor
extends TIFFDecompressor

Field Summary

Fields

Modifier and Type	Field	Description
(package private) static short[]	additionalMakeup
private int	bitPointer
private int	bitsPerScanline
(package private) static short[]	black
private byte[]	buffer
private int	bytePointer
private int	changingElemSize
protected int	compression
private int[]	currChangingElems
private byte[]	data
protected int	fillBits	EOL padding flag: 1 if fill bits have been added before an EOL such that the EOL ends on a byte boundary, 0 otherwise.
protected int	fillOrder	The logical order of bits within a byte.
(package private) static byte[]	flipTable
private int	h
(package private) static short[]	initBlack
private int	lastChangingElement
private int	lineBitNum
protected int	oneD	Coding dimensionality: 1 for 2-dimensional, 0 for 1-dimensional.
private int[]	prevChangingElems
private int	t4Options
private int	t6Options
(package private) static int[]	table1
(package private) static int[]	table2
(package private) static short[]	twoBitBlack
(package private) static byte[]	twoDCodes
protected int	uncompressedMode	Uncompressed mode flag: 1 if uncompressed, 0 if not.
private int	w
(package private) static short[]	white

Fields inherited from class TIFFDecompressor

activeSrcHeight, activeSrcMinX, activeSrcMinY, activeSrcWidth, bitsPerSample, byteCount, colorConverter, colorMap, destinationBands, dstHeight, dstMinX, dstMinY, dstWidth, dstXOffset, dstYOffset, extraSamples, image, metadata, offset, photometricInterpretation, planar, rawImage, reader, sampleFormat, samplesPerPixel, sourceBands, sourceXOffset, sourceYOffset, srcHeight, srcMinX, srcMinY, srcWidth, stream, subsampleX, subsampleY

Constructor Summary

Constructors

Constructor	Description
TIFFFaxDecompressor()

Method Summary

Modifier and Type	Method	Description
void	beginDecoding()	Invokes the superclass method and then sets instance variables on the basis of the metadata set on this decompressor.
private int	decodeBlackCodeWord()
void	decodeNextScanline(int lineIndex)
void	decodeRaw(byte[] b, int dstOffset, int pixelBitStride, int scanlineStride)	Decodes the source data into the provided byte array b, starting at the offset given by dstOffset.
void	decodeRLE()
void	decodeT4()
void	decodeT6()
private int	decodeWhiteCodeWord()
private int	findNextLine()
private void	getNextChangingElement(int a0, boolean isWhite, int[] ret)
private int	nextLesserThan8Bits(int bitsToGet)
private int	nextNBits(int bitsToGet)
private void	setToBlack(int bitNum, int numBits)
private void	updatePointer(int bitsToMoveBack)
private void	warning(String msg)

Methods inherited from class TIFFDecompressor

createRawImage, decode, decodeRaw, decodeRaw, decodeRaw, getRawImageType, getRawImageTypeSpecifier, setActiveSrcHeight, setActiveSrcMinX, setActiveSrcMinY, setActiveSrcWidth, setBitsPerSample, setByteCount, setColorConverter, setColorMap, setCompression, setDestinationBands, setDstHeight, setDstMinX, setDstMinY, setDstWidth, setDstXOffset, setDstYOffset, setExtraSamples, setImage, setMetadata, setOffset, setPhotometricInterpretation, setPlanar, setReader, setSampleFormat, setSamplesPerPixel, setSourceBands, setSourceXOffset, setSourceYOffset, setSrcHeight, setSrcMinX, setSrcMinY, setSrcWidth, setStream, setSubsampleX, setSubsampleY

Methods inherited from class Object

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

Field Details

fillOrder

protected int fillOrder

The logical order of bits within a byte.

1 = MSB-to-LSB
2 = LSB-to-MSB (flipped)

compression

protected int compression

t4Options

private int t4Options

t6Options

private int t6Options

uncompressedMode

protected int uncompressedMode

Uncompressed mode flag: 1 if uncompressed, 0 if not.

fillBits

protected int fillBits

EOL padding flag: 1 if fill bits have been added before an EOL such that the EOL ends on a byte boundary, 0 otherwise.

oneD

protected int oneD

Coding dimensionality: 1 for 2-dimensional, 0 for 1-dimensional.

data

private byte[] data

bitPointer

private int bitPointer

bytePointer

private int bytePointer

buffer

private byte[] buffer

w

private int w

h

private int h

bitsPerScanline

private int bitsPerScanline

lineBitNum

private int lineBitNum

changingElemSize

private int changingElemSize

prevChangingElems

private int[] prevChangingElems

currChangingElems

private int[] currChangingElems

lastChangingElement

private int lastChangingElement

table1

static int[] table1

table2

static int[] table2

flipTable

static byte[] flipTable

white

static short[] white

additionalMakeup

static short[] additionalMakeup

initBlack

static short[] initBlack

twoBitBlack

static short[] twoBitBlack

black

static short[] black

twoDCodes

static byte[] twoDCodes

Constructor Details

TIFFFaxDecompressor

public TIFFFaxDecompressor()

Method Details

beginDecoding

public void beginDecoding()

Invokes the superclass method and then sets instance variables on the basis of the metadata set on this decompressor.

Overrides:

beginDecoding in class TIFFDecompressor

decodeRaw

public void decodeRaw(byte[] b,
 int dstOffset,
 int pixelBitStride,
 int scanlineStride)
               throws IOException

Description copied from class: TIFFDecompressor

Decodes the source data into the provided byte array b, starting at the offset given by dstOffset. Each pixel occupies bitsPerPixel bits, with no padding between pixels. Scanlines are separated by scanlineStride bytes.

Specified by:

decodeRaw in class TIFFDecompressor

Parameters:

b - a byte array to be written.

dstOffset - the starting offset in b to be written.

pixelBitStride - the number of bits for each pixel.

scanlineStride - the number of bytes to advance between that starting pixels of each scanline.

Throws:

IOException - if an error occurs reading from the source ImageInputStream.

decodeRLE

public void decodeRLE()
               throws IIOException

Throws:

IIOException

decodeNextScanline

public void decodeNextScanline(int lineIndex)
                        throws IIOException

Throws:

IIOException

decodeT4

public void decodeT4()
              throws IIOException

Throws:

IIOException

decodeT6

public void decodeT6()
              throws IIOException

Throws:

IIOException

setToBlack

private void setToBlack(int bitNum,
 int numBits)

decodeWhiteCodeWord

private int decodeWhiteCodeWord()
                         throws IIOException

Throws:

IIOException

decodeBlackCodeWord

private int decodeBlackCodeWord()
                         throws IIOException

Throws:

IIOException

findNextLine

private int findNextLine()
                  throws IIOException,
EOFException

Throws:

IIOException

EOFException

getNextChangingElement

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

Throws:

IIOException

nextNBits

private int nextNBits(int bitsToGet)
               throws IIOException

Throws:

IIOException

nextLesserThan8Bits

private int nextLesserThan8Bits(int bitsToGet)
                         throws IIOException

Throws:

IIOException

updatePointer

private void updatePointer(int bitsToMoveBack)

warning

private void warning(String msg)