com.sun.pdfview.colorspace
Class LabColor

java.lang.Object
  extended by java.awt.color.ColorSpace
      extended by 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