Class PCHGChunk

java.lang.Object

com.twelvemonkeys.imageio.plugins.iff.IFFChunk

com.twelvemonkeys.imageio.plugins.iff.AbstractMultiPaletteChunk

com.twelvemonkeys.imageio.plugins.iff.PCHGChunk

All Implemented Interfaces:

MultiPalette

final class PCHGChunk
extends AbstractMultiPaletteChunk

PCHGChunk

Version:

$Id: PCHGChunk.java,v 1.0 27.03.12 13:02 haraldk Exp$

Field Summary

Fields

Modifier and Type	Field	Description
private int	changedLines
private int	lineCount
private int	minReg
(package private) static final int	PCHG_COMP_HUFFMAN
(package private) static final int	PCHG_COMP_NONE
(package private) static final int	PCHGF_12BIT	Use SmallLineChanges
(package private) static final int	PCHGF_32BIT	Use BigLineChanges
(package private) static final int	PCHGF_USE_ALPHA	meaningful only if PCHG_32BIT is on: use the Alpha channel info
private int	startLine
private int	totalChanges

Fields inherited from class AbstractMultiPaletteChunk

changes, FACTOR_4BIT, initialChanges, lastRow, mutablePalette, originalPalette

Fields inherited from class IFFChunk

chunkId, chunkLength

Constructor Summary

Constructors

Constructor	Description
PCHGChunk(int chunkLength)

Method Summary

Modifier and Type	Method	Description
(package private) static void	decompressHuffman(byte[] src, byte[] dest, short[] tree, int origSize)
private void	parseChanges(byte[] data, int flags)
(package private) void	readChunk(DataInput input)
private static short	toShort(byte[] bytes, int idx)

Methods inherited from class AbstractMultiPaletteChunk

getColorModel, skipLaced, writeChunk

Methods inherited from class IFFChunk

skipData, toString

Methods inherited from class Object

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

Field Details

PCHG_COMP_NONE

static final int PCHG_COMP_NONE

See Also:

• Constant Field Values

PCHG_COMP_HUFFMAN

static final int PCHG_COMP_HUFFMAN

See Also:

• Constant Field Values

PCHGF_12BIT

static final int PCHGF_12BIT

Use SmallLineChanges

See Also:

• Constant Field Values

PCHGF_32BIT

static final int PCHGF_32BIT

Use BigLineChanges

See Also:

• Constant Field Values

PCHGF_USE_ALPHA

static final int PCHGF_USE_ALPHA

meaningful only if PCHG_32BIT is on: use the Alpha channel info

See Also:

• Constant Field Values

startLine

private int startLine

changedLines

private int changedLines

lineCount

private int lineCount

totalChanges

private int totalChanges

minReg

private int minReg

Constructor Details

PCHGChunk

PCHGChunk(int chunkLength)

Method Details

readChunk

void readChunk(DataInput input)
        throws IOException

Overrides:

readChunk in class AbstractMultiPaletteChunk

Throws:

IOException

decompressHuffman

static void decompressHuffman(byte[] src,
 byte[] dest,
 short[] tree,
 int origSize)

parseChanges

private void parseChanges(byte[] data,
 int flags)
                   throws IIOException

Throws:

IIOException

toShort

private static short toShort(byte[] bytes,
 int idx)