org.faceless.pdf2
Class SpotColorSpace

java.lang.Object
  extended byjava.awt.color.ColorSpace
      extended byorg.faceless.pdf2.SpotColorSpace
All Implemented Interfaces:
Serializable

public final class SpotColorSpace
extends ColorSpace

A type of ColorSpace dealing with Separation ("Spot") Colors.

Spot colors are used to define an exact color in the printed output. This is usually done by printing these colors using a matching ink onto a separate film, ink which may be outside the gamut of the normal CMYK printing process. Commonly used Spot colors include those from the PANTONE™ and Focoltone™ range of colors.

Every Spot colorspace has a name, which is the name used by the printer to identify the ink. Because not every output device may have the specified ink available (displaying the PDF on screen for example), every Spot color must have a "fallback" color specified as a process color (RGB or CMYK) as well. Remembering that not every spot color can be reproduced in CMYK, the fallback color is often just a close match.

Like normal colorspaces (RGB, CMYK and so on), different colors can be specified within this space, although they will all be just a different intensity of the specified ink - ranging from zero (no ink is applied) to one (the full intensity of the specified color is applied).

Here's an example showing how to use the PANTONE™ color "PANTONE Reflex Blue" to print a line of text.

   Color fallback = CYMKColorSpace.getColor(1.0, 0.72, 0, 0.06);
   SpotColorSpace blueink = new SpotColorSpace("PANTONE Reflex Blue CVC", fallback);
   Color logoblue = blueink.getColor(1);

   PDFStyle style = new PDFStyle();
   style.setFillColor(logoblue);
   page.setStyle(style);
   page.drawText("This is in PANTONE Reflex Blue CVC", 100, 100);
 

Note the three stages. First we create the fallback color, specified in CMYK. As it happens this spot color is outside the gamut of the CMYK colorspace, so our fallback is an approximation only. Then we create the colorspace, and finally we select a color which is this ink at 100% intensity. From there we can just use the color as normal.

In the PDF specification Spot color is referred to as a "Separation" color.

Since:
1.1.5
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
SpotColorSpace(String name, Color color)
          Create a new SpotColorSpace representing a single custom ink.
 
Method Summary
 float[] fromCIEXYZ(float[] comp)
           
 float[] fromRGB(float[] comp)
           
 Color getColor()
          A convenience method returning the color specified by the full intensity of this colorspace.
 Color getColor(float amt)
          A convenience method to return a color from this ColorSpace.
 Color getColor(float amt, float alpha)
          A convenience method to return a color from this ColorSpace.
 Color getFallbackColor()
          Get the fallback color to use if this ink is not available
 String getName()
          Get the name of this colorspace
 float[] toCIEXYZ(float[] comp)
           
 float[] toRGB(float[] comp)
           
 
Methods inherited from class java.awt.color.ColorSpace
getInstance, getMaxValue, getMinValue, getName, getNumComponents, getType, isCS_sRGB
 
Methods inherited from class java.lang.Object
equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Constructor Detail

SpotColorSpace

public SpotColorSpace(String name,
                      Color color)
Create a new SpotColorSpace representing a single custom ink.

Parameters:
name - the name of the ink
color - the color to use as a fallback color if this ink is not available. Must be from either an RGB, CMYK or Grayscale ColorSpace, or an IllegalArgumentException is thrown.
Method Detail

getName

public String getName()
Get the name of this colorspace


getFallbackColor

public Color getFallbackColor()
Get the fallback color to use if this ink is not available


getColor

public Color getColor(float amt)
A convenience method to return a color from this ColorSpace.

Parameters:
amt - The intensity of the color. Any value between zero and one, where zero means no ink at all and one means the full intensity. If the number is outside this range, an IllegalArgumentException is thrown
Throws:
IllegalArgumentException

getColor

public Color getColor(float amt,
                      float alpha)
A convenience method to return a color from this ColorSpace.

Parameters:
amt - The intensity of the color. Any value between zero and one, where zero means no ink at all and one means the full intensity. If the number is outside this range, an IllegalArgumentException is thrown
alpha - the alpha value of this color - 0 meaning transparent, 1 meaning opaque. If the number is outside this range, an IllegalArgumentException is thrown
Throws:
IllegalArgumentException
Since:
2.0.5

getColor

public Color getColor()
A convenience method returning the color specified by the full intensity of this colorspace. Equivalent to getColor(1).


toCIEXYZ

public float[] toCIEXYZ(float[] comp)

fromCIEXYZ

public float[] fromCIEXYZ(float[] comp)

toRGB

public float[] toRGB(float[] comp)

fromRGB

public float[] fromRGB(float[] comp)


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