com.twelvemonkeys.imageio.color

Class DiscreteAlphaIndexColorModel

java.lang.Object

java.awt.image.ColorModel

com.twelvemonkeys.imageio.color.DiscreteAlphaIndexColorModel

All Implemented Interfaces:

Transparency

public final class DiscreteAlphaIndexColorModel
extends ColorModel

This class represents a hybrid between an IndexColorModel and a ComponentColorModel, having both a color map and a full, discrete alpha channel and/or one or more "extra" channels. The color map entries are assumed to be fully opaque and should have no transparent index.

ColorSpace will always be the default sRGB color space (as with IndexColorModel).

Component order is always I, A, X₁, X₂... X_n, where I is a palette index, A is the alpha value and X_n are extra samples (ignored for display).

See Also:

IndexColorModel, ComponentColorModel

Field Summary

Fields inherited from class java.awt.image.ColorModel

pixel_bits, transferType

Fields inherited from interface java.awt.Transparency

BITMASK, OPAQUE, TRANSLUCENT

Constructor Summary

Constructors

Constructor and Description
DiscreteAlphaIndexColorModel(IndexColorModel icm) Creates a DiscreteAlphaIndexColorModel, delegating color map look-ups to the given IndexColorModel.
DiscreteAlphaIndexColorModel(IndexColorModel icm, int extraSamples, boolean hasAlpha) Creates a DiscreteAlphaIndexColorModel, delegating color map look-ups to the given IndexColorModel.

Method Summary

Modifier and Type	Method and Description
SampleModel	createCompatibleSampleModel(int w, int h)
WritableRaster	createCompatibleWritableRaster(int w, int h)
boolean	equals(Object obj)
int	getAlpha(int pixel)
int	getAlpha(Object inData)
int	getBlue(int pixel)
int	getBlue(Object inData)
int	getGreen(int pixel)
int	getGreen(Object inData)
int	getNumComponents()
int	getRed(int pixel)
int	getRed(Object inData)
boolean	isCompatibleRaster(Raster raster)
boolean	isCompatibleSampleModel(SampleModel sm)
String	toString()

Methods inherited from class java.awt.image.ColorModel

coerceData, finalize, getAlphaRaster, getColorSpace, getComponents, getComponents, getComponentSize, getComponentSize, getDataElement, getDataElement, getDataElements, getDataElements, getDataElements, getNormalizedComponents, getNormalizedComponents, getNumColorComponents, getPixelSize, getRGB, getRGB, getRGBdefault, getTransferType, getTransparency, getUnnormalizedComponents, hasAlpha, hashCode, isAlphaPremultiplied

Methods inherited from class java.lang.Object

clone, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

DiscreteAlphaIndexColorModel

public DiscreteAlphaIndexColorModel(IndexColorModel icm)

Creates a DiscreteAlphaIndexColorModel, delegating color map look-ups to the given IndexColorModel.

Parameters:

icm - The IndexColorModel delegate. Color map entries are assumed to be fully opaque, any transparency or transparent index will be ignored.

DiscreteAlphaIndexColorModel

public DiscreteAlphaIndexColorModel(IndexColorModel icm,
                                    int extraSamples,
                                    boolean hasAlpha)

Creates a DiscreteAlphaIndexColorModel, delegating color map look-ups to the given IndexColorModel.

Parameters:

icm - The IndexColorModel delegate. Color map entries are assumed to be fully opaque, any transparency or transparent index will be ignored.

extraSamples - the number of extra samples in the color model.

hasAlpha - true if the extra samples contains alpha, otherwise false.

Method Detail

getNumComponents

public int getNumComponents()

Overrides:

getNumComponents in class ColorModel

getRed

public int getRed(int pixel)

Specified by:

getRed in class ColorModel

getGreen

public int getGreen(int pixel)

Specified by:

getGreen in class ColorModel

getBlue

public int getBlue(int pixel)

Specified by:

getBlue in class ColorModel

getAlpha

public int getAlpha(int pixel)

Specified by:

getAlpha in class ColorModel

getRed

public int getRed(Object inData)

Overrides:

getRed in class ColorModel

getGreen

public int getGreen(Object inData)

Overrides:

getGreen in class ColorModel

getBlue

public int getBlue(Object inData)

Overrides:

getBlue in class ColorModel

getAlpha

public int getAlpha(Object inData)

Overrides:

getAlpha in class ColorModel

createCompatibleSampleModel

public SampleModel createCompatibleSampleModel(int w,
                                               int h)

Overrides:

createCompatibleSampleModel in class ColorModel

isCompatibleSampleModel

public boolean isCompatibleSampleModel(SampleModel sm)

Overrides:

isCompatibleSampleModel in class ColorModel

createCompatibleWritableRaster

public WritableRaster createCompatibleWritableRaster(int w,
                                                     int h)

Overrides:

createCompatibleWritableRaster in class ColorModel

isCompatibleRaster

public boolean isCompatibleRaster(Raster raster)

Overrides:

isCompatibleRaster in class ColorModel

equals

public boolean equals(Object obj)

Overrides:

equals in class ColorModel

toString

public String toString()

Overrides:

toString in class ColorModel