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java.lang.Objectjava.awt.color.ColorSpace
org.faceless.pdf2.SpotColorSpace
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.
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)
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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 |
public SpotColorSpace(String name, Color color)
name
- the name of the inkcolor
- 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 |
public String getName()
public Color getFallbackColor()
public Color getColor(float amt)
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
IllegalArgumentException
public Color getColor(float amt, float alpha)
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 thrownalpha
- the alpha value of this color - 0 meaning transparent, 1 meaning opaque.
If the number is outside this range, an IllegalArgumentException is thrown
IllegalArgumentException
public Color getColor()
public float[] toCIEXYZ(float[] comp)
public float[] fromCIEXYZ(float[] comp)
public float[] toRGB(float[] comp)
public float[] fromRGB(float[] comp)
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