org.jhotdraw.color

Class CIEXYChromaticityDiagramImageProducer

java.lang.Object

java.awt.image.MemoryImageSource

org.jhotdraw.color.CIEXYChromaticityDiagramImageProducer

All Implemented Interfaces:

java.awt.image.ImageProducer

public class CIEXYChromaticityDiagramImageProducer
extends java.awt.image.MemoryImageSource

Produces a CIE xy Chromaticity Diagram.

The diagram shows a projection of the CIE XYZ cube on a xy plane. The projection is based on the following equations:

x = X / (X + Y + Z), y = Y / (X + Y + Z), z = 1 - x - y.

The equations can be rewritten as:

X = (x*(Y+Z)/(1-x), Y = (y*(X+Z)/(1-y).

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	CIEXYChromaticityDiagramImageProducer.OutsideGamutHandling

Field Summary

Fields

Modifier and Type	Field and Description
protected int	angularIndex
protected java.awt.color.ColorSpace	colorSpace
protected int	h
protected boolean	isLookupValid
protected boolean	isPixelsValid
protected int[]	pixels
protected int	radialIndex
protected int	verticalIndex
protected float	verticalValue
protected int	w

Constructor Summary

Constructors

Constructor and Description
CIEXYChromaticityDiagramImageProducer(int w, int h)

Method Summary

Modifier and Type	Method and Description
void	generateImage()
float[]	getColorAt(int x, int y)
java.awt.Point	getColorLocation(java.awt.Color c)
java.awt.Point	getColorLocation(float[] components)
int	getHeight()
int	getWidth()
boolean	needsGeneration()
void	regenerateDiagram()
void	toRGB(float[] ciexyz, float[] rgb)

Methods inherited from class java.awt.image.MemoryImageSource

addConsumer, isConsumer, newPixels, newPixels, newPixels, newPixels, newPixels, removeConsumer, requestTopDownLeftRightResend, setAnimated, setFullBufferUpdates, startProduction

Methods inherited from class java.lang.Object

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

Field Detail

pixels

protected int[] pixels

w

protected int w

h

protected int h

colorSpace

protected java.awt.color.ColorSpace colorSpace

radialIndex

protected int radialIndex

angularIndex

protected int angularIndex

verticalIndex

protected int verticalIndex

isPixelsValid

protected boolean isPixelsValid

verticalValue

protected float verticalValue

isLookupValid

protected boolean isLookupValid

Constructor Detail

CIEXYChromaticityDiagramImageProducer

public CIEXYChromaticityDiagramImageProducer(int w,
                                             int h)

Method Detail

needsGeneration

public boolean needsGeneration()

regenerateDiagram

public void regenerateDiagram()

generateImage

public void generateImage()

getColorLocation

public java.awt.Point getColorLocation(java.awt.Color c)

getColorLocation

public java.awt.Point getColorLocation(float[] components)

getColorAt

public float[] getColorAt(int x,
                          int y)

getWidth

public int getWidth()

getHeight

public int getHeight()

toRGB

public void toRGB(float[] ciexyz,
                  float[] rgb)