com.lizardtech.djvu
Class Palette

java.lang.Object
  com.lizardtech.djvu.DjVuObject
      com.lizardtech.djvu.Palette

All Implemented Interfaces:

Codec, DjVuInterface, java.lang.Cloneable

public class Palette
extends DjVuObject
implements java.lang.Cloneable, Codec

DOCUMENT ME!

Version:

$Revision: 1.7 $

Author:

$author$

Field Summary

int[]	colordata Contains an optional sequence of color indices.
static int	DJVUPALETTEVERSION DOCUMENT ME!

Fields inherited from class com.lizardtech.djvu.DjVuObject

hasReferences

Constructor Summary

Palette()
Creates a new Palette object.

Method Summary

java.lang.Object	clone() DOCUMENT ME!
int	color_to_index(GPixel p) Returns the best palette index for representing color #bgr#.
static Palette	createPalette(DjVuInterface ref) Creates an instance of Palette with the options interherited from the specified reference.
void	decode_rgb_entries(java.io.InputStream input, int palettesize) Reads palette colors.
void	decode(CachedInputStream pool) Initializes the object by reading data from bytestream #bs#.
void	get_color(int nth, GPixel out) Returns colors from the color index sequence.
GPixel[]	getPalette() DOCUMENT ME!
void	index_to_color(int index, GPixel p) Overwrites #p# with the color located at position #index# in the palette.
boolean	isImageData() Query if this is image data.
void	setPalette(GPixel[] palette) DOCUMENT ME!
int	size() Returns the number of colors in the palette.

Methods inherited from class com.lizardtech.djvu.DjVuObject

checkLockTime, create, create, createSoftReference, createWeakReference, getDjVuOptions, getFromReference, invoke, logError, printStackTrace, setDjVuOptions, verbose

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.lizardtech.djvu.DjVuInterface

getDjVuOptions, setDjVuOptions

Field Detail

DJVUPALETTEVERSION

public static final int DJVUPALETTEVERSION

DOCUMENT ME!

See Also:

Constant Field Values

colordata

public int[] colordata

Contains an optional sequence of color indices. Function \Ref{encode} and \Ref{decode} also encode and decode this sequence when such a sequence is provided.

Constructor Detail

Palette

public Palette()

Creates a new Palette object.

Method Detail

isImageData

public boolean isImageData()

Query if this is image data.

Specified by:

isImageData in interface Codec

Returns:

true

setPalette

public void setPalette(GPixel[] palette)

DOCUMENT ME!

Parameters:

palette - DOCUMENT ME!

getPalette

public GPixel[] getPalette()

DOCUMENT ME!

Returns:

DOCUMENT ME!

createPalette

public static Palette createPalette(DjVuInterface ref)

Creates an instance of Palette with the options interherited from the specified reference.

Parameters:

ref - Object to interherit DjVuOptions from.

Returns:

a new instance of Palette.

clone

public java.lang.Object clone()

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Overrides:

clone in class java.lang.Object

Returns:

DOCUMENT ME!

get_color

public final void get_color(int nth,
                            GPixel out)

Returns colors from the color index sequence. Pixel #out# is overwritten with the color corresponding to the #nth# element of the color sequence \Ref{colordata}.

Parameters:

nth - DOCUMENT ME!

out - DOCUMENT ME!

size

public final int size()

Returns the number of colors in the palette.

Returns:

DOCUMENT ME!

color_to_index

public int color_to_index(GPixel p)

Returns the best palette index for representing color #bgr#.

Parameters:

p - DOCUMENT ME!

Returns:

DOCUMENT ME!

index_to_color

public final void index_to_color(int index,
                                 GPixel p)

Overwrites #p# with the color located at position #index# in the palette.

Parameters:

index - DOCUMENT ME!

p - DOCUMENT ME!

decode

public void decode(CachedInputStream pool)
            throws java.io.IOException

Initializes the object by reading data from bytestream #bs#. This function reads a version byte, the palette size, the palette and the color index sequence from bytestream #bs#.

Specified by:

decode in interface Codec

Parameters:

pool - DOCUMENT ME!

Throws:

java.io.IOException - DOCUMENT ME!

decode_rgb_entries

public void decode_rgb_entries(java.io.InputStream input,
                               int palettesize)
                        throws java.io.IOException

Reads palette colors. This function initializes the palette colors by reading #palettesize# RGB triples from bytestream #bs#.

Parameters:

input - DOCUMENT ME!

palettesize - DOCUMENT ME!

Throws:

java.io.IOException - DOCUMENT ME!