Package com.inductiveautomation.rm.pdf.reader

Class PDFDeviceCMYK

java.lang.Object

java.awt.color.ColorSpace

com.inductiveautomation.rm.pdf.reader.PDFDeviceCMYK

All Implemented Interfaces:

Serializable

public class PDFDeviceCMYK
extends ColorSpace

This is an implementation of the DeviceCMYK colorspace as defined in the pdf spec. Note that there is a CMYK colorspace profile available from Sun in the JAICMM package, but there are several problems with it. First and foremost, it doesn't generate colors that are consistent with Acrobat. Secondly, it is enormous, at 1/2 meg.

The cmyk->rgb conversion is trivial. rgb->cmyk, however, can be arbitrarily complex as custom black-generation and undercolor-removal functions can be specified in the graphics state.

The spec defines the rgb->cmyk conversion like this : UCR(x) = undercolor-removal function BG(x) = black-generation function k = min(1-red, 1-green, 1-blue) cyan = min(1, max(0, 1-red-UCR(k))) magenta = min(1, max(0, 1-green-UCR(k))) yellow = min(1, max(0, 1-blue-UCR(k))) black = min(1, max(0, BG(k)))

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

Constructors

Constructor	Description
PDFDeviceCMYK()
PDFDeviceCMYK(int type, int numcomponents)

Method Summary

Modifier and Type	Method	Description
float[]	fromCIEXYZ(float[] colorvalue)
float[]	fromRGB(float[] rgbvalue)
float[]	toCIEXYZ(float[] colorvalue)
float[]	toRGB(float[] colorvalue)

Methods inherited from class java.awt.color.ColorSpace

getInstance, getMaxValue, getMinValue, getName, getNumComponents, getType, isCS_sRGB

Methods inherited from class java.lang.Object

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

Constructor Details

PDFDeviceCMYK

public PDFDeviceCMYK()

PDFDeviceCMYK

public PDFDeviceCMYK(int type,
 int numcomponents)

Method Details

toRGB

public float[] toRGB(float[] colorvalue)

Specified by:

toRGB in class ColorSpace

fromRGB

public float[] fromRGB(float[] rgbvalue)

Specified by:

fromRGB in class ColorSpace

toCIEXYZ

public float[] toCIEXYZ(float[] colorvalue)

Specified by:

toCIEXYZ in class ColorSpace

fromCIEXYZ

public float[] fromCIEXYZ(float[] colorvalue)

Specified by:

fromCIEXYZ in class ColorSpace