org.eclipse.swt.internal.image

Class LZWCodec

java.lang.Object

org.eclipse.swt.internal.image.LZWCodec

final class LZWCodec
extends java.lang.Object

Structure Diagram

Field Summary

Fields

Modifier and Type	Field and Description
(package private) int	bitsLeft
(package private) int	bitsPerPixel
(package private) byte[]	block
(package private) int	blockIndex
(package private) int	blockSize
(package private) int	clearCode
(package private) int	codeMask
(package private) int	codeSize
(package private) int	currentByte
(package private) int	currentSlot
(package private) int	endCode
(package private) ImageData	image
(package private) int	imageHeight
(package private) int	imageWidth
(package private) int	imageX
(package private) int	imageY
(package private) LEDataInputStream	inputStream
(package private) boolean	interlaced
(package private) int	line
(package private) byte[]	lineArray
(package private) ImageLoader	loader
(package private) static int[]	MASK_TABLE
(package private) int	newCodes
(package private) LZWNode[]	nodeStack
(package private) LEDataOutputStream	outputStream
(package private) int	pass
(package private) int[]	prefix
(package private) int[]	stack
(package private) int[]	suffix
(package private) int	topSlot

Constructor Summary

Constructors

Constructor and Description
LZWCodec()

Method Summary

Methods

Modifier and Type	Method and Description
(package private) void	copyRow(byte[] buf, int copies) Copy duplicate rows of pixel values to the image.
(package private) void	decode() Decode the input.
void	decode(LEDataInputStream inputStream, ImageLoader loader, ImageData image, boolean interlaced, int depth) Decode the LZW-encoded bytes in the given byte stream into the given DeviceIndependentImage.
(package private) void	encode() Encode the image.
void	encode(LEDataOutputStream byteStream, ImageData image) Encode the bytes into the given byte stream from the given DeviceIndependentImage.
(package private) int	encodeLoop() Encoding loop broken out to allow early return.
(package private) void	initializeForDecoding() Initialize the receiver for decoding the given byte array.
(package private) void	initializeForEncoding() Initialize the receiver for encoding the given byte array.
(package private) int	nextCode() Answer the next code from the input byte array.
(package private) int	nextPixel() Answer the next pixel to encode in the image
(package private) void	nextPixels(byte[] buf, int lineWidth) Copy a row of pixel values from the image.
(package private) void	nextPutCode(int aCode) Output aCode to the output stream.
(package private) void	nextPutPixels(byte[] buf) Copy a row of pixel values to the image.
(package private) int	readBlock() Read a block from the byte stream.
(package private) void	writeBlock() Write a block to the byte stream.

Methods inherited from class java.lang.Object

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

Field Detail

bitsPerPixel

int bitsPerPixel

blockSize

int blockSize

blockIndex

int blockIndex

currentByte

int currentByte

bitsLeft

int bitsLeft

codeSize

int codeSize

clearCode

int clearCode

endCode

int endCode

newCodes

int newCodes

topSlot

int topSlot

currentSlot

int currentSlot

imageWidth

int imageWidth

imageHeight

int imageHeight

imageX

int imageX

imageY

int imageY

pass

int pass

line

int line

codeMask

int codeMask

block

byte[] block

lineArray

byte[] lineArray

stack

int[] stack

suffix

int[] suffix

prefix

int[] prefix

nodeStack

LZWNode[] nodeStack

inputStream

LEDataInputStream inputStream

outputStream

LEDataOutputStream outputStream

image

ImageData image

loader

ImageLoader loader

interlaced

boolean interlaced

MASK_TABLE

static final int[] MASK_TABLE

Constructor Detail

LZWCodec

LZWCodec()

Method Detail

decode

void decode()

Decode the input.

decode

public void decode(LEDataInputStream inputStream,
          ImageLoader loader,
          ImageData image,
          boolean interlaced,
          int depth)

Decode the LZW-encoded bytes in the given byte stream into the given DeviceIndependentImage.

encode

void encode()

Encode the image.

encode

public void encode(LEDataOutputStream byteStream,
          ImageData image)

Encode the bytes into the given byte stream from the given DeviceIndependentImage.

encodeLoop

int encodeLoop()

Encoding loop broken out to allow early return.

initializeForDecoding

void initializeForDecoding()

Initialize the receiver for decoding the given byte array.

initializeForEncoding

void initializeForEncoding()

Initialize the receiver for encoding the given byte array.

nextCode

int nextCode()

Answer the next code from the input byte array.

nextPixel

int nextPixel()

Answer the next pixel to encode in the image

nextPixels

void nextPixels(byte[] buf,
              int lineWidth)

Copy a row of pixel values from the image.

nextPutCode

void nextPutCode(int aCode)

Output aCode to the output stream.

nextPutPixels

void nextPutPixels(byte[] buf)

Copy a row of pixel values to the image.

copyRow

void copyRow(byte[] buf,
           int copies)

Copy duplicate rows of pixel values to the image. This is to fill in rows if the image is interlaced.

readBlock

int readBlock()

Read a block from the byte stream. Return the number of bytes read. Throw an exception if the block could not be read.

writeBlock

void writeBlock()

Write a block to the byte stream. Throw an exception if the block could not be written.