com.sun.media.imageioimpl.plugins.jpeg2000

Class PaletteBox

java.lang.Object

com.sun.media.imageioimpl.plugins.jpeg2000.Box

com.sun.media.imageioimpl.plugins.jpeg2000.PaletteBox

public class PaletteBox
extends Box

This class is designed to represent a palette box for JPEG 2000 JP2 file format. A palette box has a length, and a fixed type of "pclr". Its content contains the number of palette entry, the number of color components, the bit depths of the output components, the LUT. Currently, only 8-bit color index is supported.

Field Summary

Fields

Modifier and Type	Field and Description
private byte[]	bitDepth
private byte[][]	lut
private int	numComps
private int	numEntries The value of the data elements.

Fields inherited from class com.sun.media.imageioimpl.plugins.jpeg2000.Box

data, extraLength, length, type

Constructor Summary

Constructors

Constructor and Description
PaletteBox(byte[] data) Constructs a PlatteBox from the provided byte array.
PaletteBox(IndexColorModel icm) Constructs a PlatteBox from an IndexColorModel.
PaletteBox(int length, byte[] comp, byte[][] lut) Constructs a PlatteBox from the provided length, bit depths of the color components and the LUT.
PaletteBox(Node node) Constructs a PlatteBox from an org.w3c.dom.Node.

Method Summary

Modifier and Type	Method and Description
protected void	compose() Composes the content byte array from the data elements.
private static int	computeLength(IndexColorModel icm) Compute the length of this box.
byte[]	getBitDepths() Return the bit depths for all the color components.
private static byte[]	getCompSize(IndexColorModel icm) Gets the size of the components or the bit depth for all the color coomponents.
byte[][]	getLUT() Return the LUT.
private static byte[][]	getLUT(IndexColorModel icm) Gets the LUT from the IndexColorModel as an two-dimensional byte array.
IIOMetadataNode	getNativeNode() creates an IIOMetadataNode from this palette box.
int	getNumComp() Return the number of color components.
int	getNumEntries() Return the number of palette entries.
protected void	parse(byte[] data) Parses the data elements from the byte array.

Methods inherited from class com.sun.media.imageioimpl.plugins.jpeg2000.Box

copyInt, createBox, getAttribute, getBoxClass, getByteArrayElementValue, getByteElementValue, getContent, getExtraLength, getIntArrayElementValue, getIntElementValue, getLength, getName, getNativeNodeForSimpleBox, getShortElementValue, getStringElementValue, getType, getTypeByName, getTypeInt, getTypeString, parseByteArray, parseIntArray, read, setContent, setDefaultAttributes, setExtraLength, setLength, write

Methods inherited from class java.lang.Object

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

Field Detail

numEntries

private int numEntries

The value of the data elements.

numComps

private int numComps

bitDepth

private byte[] bitDepth

lut

private byte[][] lut

Constructor Detail

PaletteBox

public PaletteBox(IndexColorModel icm)

Constructs a PlatteBox from an IndexColorModel.

PaletteBox

public PaletteBox(Node node)
           throws IIOInvalidTreeException

Constructs a PlatteBox from an org.w3c.dom.Node.

Throws:

IIOInvalidTreeException

PaletteBox

public PaletteBox(int length,
                  byte[] comp,
                  byte[][] lut)

Constructs a PlatteBox from the provided length, bit depths of the color components and the LUT.

PaletteBox

public PaletteBox(byte[] data)

Constructs a PlatteBox from the provided byte array.

Method Detail

computeLength

private static int computeLength(IndexColorModel icm)

Compute the length of this box.

getCompSize

private static byte[] getCompSize(IndexColorModel icm)

Gets the size of the components or the bit depth for all the color coomponents.

getLUT

private static byte[][] getLUT(IndexColorModel icm)

Gets the LUT from the IndexColorModel as an two-dimensional byte array.

getNumEntries

public int getNumEntries()

Return the number of palette entries.

getNumComp

public int getNumComp()

Return the number of color components.

getBitDepths

public byte[] getBitDepths()

Return the bit depths for all the color components.

getLUT

public byte[][] getLUT()

Return the LUT.

getNativeNode

public IIOMetadataNode getNativeNode()

creates an IIOMetadataNode from this palette box. The format of this node is defined in the XML dtd and xsd for the JP2 image file.

Overrides:

getNativeNode in class Box

parse

protected void parse(byte[] data)

Description copied from class: Box

Parses the data elements from the byte array. The subclasses should override this method.

Overrides:

parse in class Box

compose

protected void compose()

Description copied from class: Box

Composes the content byte array from the data elements.

Overrides:

compose in class Box