com.sun.pdfview.colorspace
Class LabColor

java.lang.Object
  java.awt.color.ColorSpace
      com.sun.pdfview.colorspace.LabColor

All Implemented Interfaces:

java.io.Serializable

public class LabColor
extends java.awt.color.ColorSpace

A ColorSpace for Lab color

See Also:

Serialized Form

Field Summary

Fields inherited from class java.awt.color.ColorSpace

CS_CIEXYZ, CS_GRAY, CS_LINEAR_RGB, CS_PYCC, CS_sRGB, TYPE_2CLR, TYPE_3CLR, TYPE_4CLR, TYPE_5CLR, TYPE_6CLR, TYPE_7CLR, TYPE_8CLR, TYPE_9CLR, TYPE_ACLR, TYPE_BCLR, TYPE_CCLR, TYPE_CMY, TYPE_CMYK, TYPE_DCLR, TYPE_ECLR, TYPE_FCLR, TYPE_GRAY, TYPE_HLS, TYPE_HSV, TYPE_Lab, TYPE_Luv, TYPE_RGB, TYPE_XYZ, TYPE_YCbCr, TYPE_Yxy

Constructor Summary

LabColor(PDFObject obj)
Create a new Lab color space object, given the description in a PDF dictionary.

Method Summary

float[]	fromCIEXYZ(float[] colorvalue) convert from CIEXYZ to Lab.
float[]	fromRGB(float[] rgbvalue) convert from RGB to Lab.
int	getNumComponents() get the number of components for this color space (3)
int	getType() get the type of this colorspace (TYPE_Lab)
float	stage2(float s1) Stage 2 of the conversion algorithm.
float[]	toCIEXYZ(float[] colorvalue) convert from Lab to CIEXYZ.
float[]	toRGB(float[] comp) convert from Lab to RGB

Methods inherited from class java.awt.color.ColorSpace

getInstance, getMaxValue, getMinValue, getName, isCS_sRGB

Methods inherited from class java.lang.Object

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

Constructor Detail

LabColor

public LabColor(PDFObject obj)
         throws java.io.IOException

Create a new Lab color space object, given the description in a PDF dictionary.

Parameters:

obj - a dictionary that contains an Array of 3 Numbers for "WhitePoint" and "BlackPoint", and an array of 4 Numbers for "Range".

Throws:

java.io.IOException

Method Detail

getNumComponents

public int getNumComponents()

get the number of components for this color space (3)

Overrides:

getNumComponents in class java.awt.color.ColorSpace

stage2

public final float stage2(float s1)

Stage 2 of the conversion algorithm. Pulled out because it gets invoked for each component

toRGB

public float[] toRGB(float[] comp)

convert from Lab to RGB

Specified by:

toRGB in class java.awt.color.ColorSpace

Parameters:

comp - the Lab values (0-1)

Returns:

the RGB values (0-1)

fromRGB

public float[] fromRGB(float[] rgbvalue)

convert from RGB to Lab. NOT IMPLEMENTED

Specified by:

fromRGB in class java.awt.color.ColorSpace

fromCIEXYZ

public float[] fromCIEXYZ(float[] colorvalue)

convert from CIEXYZ to Lab. NOT IMPLEMENTED

Specified by:

fromCIEXYZ in class java.awt.color.ColorSpace

getType

public int getType()

get the type of this colorspace (TYPE_Lab)

Overrides:

getType in class java.awt.color.ColorSpace

toCIEXYZ

public float[] toCIEXYZ(float[] colorvalue)

convert from Lab to CIEXYZ. NOT IMPLEMENTED

Specified by:

toCIEXYZ in class java.awt.color.ColorSpace