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org.eclipse.swt.internal.image
Class PngDecodingDataStream  

java.lang.Object
  org.eclipse.swt.internal.image.PngDecodingDataStream

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public class PngDecodingDataStream

extends java.lang.Object

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Field Summary
(package private)  int	adlerValue
(package private)  PngChunkReader	chunkReader
(package private)  byte	currentByte
(package private)  PngIdatChunk	currentChunk
(package private)  PngLzBlockReader	lzBlockReader
(package private) static int	MAX_BIT
(package private)  int	nextBitIndex
(package private)  int	nextByteIndex
(package private) static int	PRIME

 

Constructor Summary
(package private)	PngDecodingDataStream(PngIdatChunk idatChunk, PngChunkReader chunkReader)

 

Method Summary
(package private)  void	assertImageDataAtEnd()           This method should be called when the image decoder thinks that all of the compressed image data has been read.
(package private)  void	checkAdler()
(package private)  void	error()
private  PngIdatChunk	getNextChunk()
(package private)  byte	getNextDecodedByte()
(package private)  byte	getNextIdatBit()
(package private)  int	getNextIdatBits(int length)
(package private)  byte	getNextIdatByte()
private  void	readCompressedDataHeader()
private  void	updateAdler(byte value)

 

Methods inherited from class java.lang.Object

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

 

Field Detail

currentChunk

PngIdatChunk currentChunk

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chunkReader

PngChunkReader chunkReader

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currentByte

byte currentByte

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nextByteIndex

int nextByteIndex

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nextBitIndex

int nextBitIndex

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lzBlockReader

PngLzBlockReader lzBlockReader

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adlerValue

int adlerValue

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PRIME

static final int PRIME

See Also:

Constant Field Values

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MAX_BIT

static final int MAX_BIT

See Also:

Constant Field Values

Constructor Detail

PngDecodingDataStream

PngDecodingDataStream(PngIdatChunk idatChunk,
                      PngChunkReader chunkReader)

Method Detail

assertImageDataAtEnd

void assertImageDataAtEnd()

This method should be called when the image decoder thinks that all of the compressed image data has been read. This method will ensure that the next data value is an end of block marker. If there are more blocks after this one, the method will read them and ensure that they are empty.

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getNextIdatBits

int getNextIdatBits(int length)

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getNextIdatBit

byte getNextIdatBit()

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getNextChunk

private PngIdatChunk getNextChunk()

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getNextIdatByte

byte getNextIdatByte()

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updateAdler

private void updateAdler(byte value)

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getNextDecodedByte

byte getNextDecodedByte()

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error

void error()

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readCompressedDataHeader

private void readCompressedDataHeader()

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checkAdler

void checkAdler()

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