Package org.apache.commons.imaging.palette

Class QuantizedPalette

java.lang.Object

org.apache.commons.imaging.palette.QuantizedPalette

All Implemented Interfaces:

Palette

public class QuantizedPalette
extends Object
implements Palette

Field Summary

Fields

Modifier and Type	Field	Description
private final int	precision
private final ColorSpaceSubset[]	straight
private final List<ColorSpaceSubset>	subsets

Constructor Summary

Constructors

Constructor	Description
QuantizedPalette(List<ColorSpaceSubset> subsets, int precision)

Method Summary

Modifier and Type	Method	Description
int	getEntry(int index)	Looks up the color for a given palette index.
int	getPaletteIndex(int rgb)	Looks up the palette index for a given color.
int	length()	The number of entries in the palette.

Methods inherited from class java.lang.Object

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

Field Details

precision

private final int precision

subsets

private final List<ColorSpaceSubset> subsets

straight

private final ColorSpaceSubset[] straight

Constructor Details

QuantizedPalette

public QuantizedPalette(List<ColorSpaceSubset> subsets,
 int precision)

Method Details

getPaletteIndex

public int getPaletteIndex(int rgb)
                    throws ImageWriteException

Description copied from interface: Palette

Looks up the palette index for a given color.

Specified by:

getPaletteIndex in interface Palette

Parameters:

rgb - the color to look up

Returns:

the palette index

Throws:

ImageWriteException - if it fails to read the palette index

getEntry

public int getEntry(int index)

Description copied from interface: Palette

Looks up the color for a given palette index.

Specified by:

getEntry in interface Palette

Parameters:

index - the palette index to look up

Returns:

the color in ARGB format

length

public int length()

Description copied from interface: Palette

The number of entries in the palette.

Specified by:

length in interface Palette

Returns:

the number of palette entries