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	/*
	* Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/

	/*
	**********************************************************************
	**********************************************************************
	**********************************************************************
	* COPYRIGHT (c) Eastman Kodak Company, 1997 *
	* As an unpublished work pursuant to Title 17 of the United *
	* States Code. All rights reserved. *
	**********************************************************************
	**********************************************************************
	**********************************************************************/

	package java.awt.color;

	import java.lang.annotation.Native;

	import sun.java2d.cmm.PCMM;
	import sun.java2d.cmm.CMSManager;


	/**
	* This abstract class is used to serve as a color space tag to identify the
	* specific color space of a Color object or, via a ColorModel object,
	* of an Image, a BufferedImage, or a GraphicsDevice. It contains
	* methods that transform colors in a specific color space to/from sRGB
	* and to/from a well-defined CIEXYZ color space.
	* <p>
	* For purposes of the methods in this class, colors are represented as
	* arrays of color components represented as floats in a normalized range
	* defined by each ColorSpace. For many ColorSpaces (e.g. sRGB), this
	* range is 0.0 to 1.0. However, some ColorSpaces have components whose
	* values have a different range. Methods are provided to inquire per
	* component minimum and maximum normalized values.
	* <p>
	* Several variables are defined for purposes of referring to color
	* space types (e.g. TYPE_RGB, TYPE_XYZ, etc.) and to refer to specific
	* color spaces (e.g. CS_sRGB and CS_CIEXYZ).
	* sRGB is a proposed standard RGB color space. For more information,
	* see <A href="http://www.w3.org/pub/WWW/Graphics/Color/sRGB.html">
	* http://www.w3.org/pub/WWW/Graphics/Color/sRGB.html
	* </A>.
	* <p>
	* The purpose of the methods to transform to/from the well-defined
	* CIEXYZ color space is to support conversions between any two color
	* spaces at a reasonably high degree of accuracy. It is expected that
	* particular implementations of subclasses of ColorSpace (e.g.
	* ICC_ColorSpace) will support high performance conversion based on
	* underlying platform color management systems.
	* <p>
	* The CS_CIEXYZ space used by the toCIEXYZ/fromCIEXYZ methods can be
	* described as follows:
	<pre>

	CIEXYZ
	viewing illuminance: 200 lux
	viewing white point: CIE D50
	media white point: "that of a perfectly reflecting diffuser" -- D50
	media black point: 0 lux or 0 Reflectance
	flare: 1 percent
	surround: 20percent of the media white point
	media description: reflection print (i.e., RLAB, Hunt viewing media)
	note: For developers creating an ICC profile for this conversion
	space, the following is applicable. Use a simple Von Kries
	white point adaptation folded into the 3X3 matrix parameters
	and fold the flare and surround effects into the three
	one-dimensional lookup tables (assuming one uses the minimal
	model for monitors).

	</pre>
	*
	* @see ICC_ColorSpace
	*/

	public abstract class ColorSpace implements java.io.Serializable {

	static final long serialVersionUID = -409452704308689724L;

	private int type;
	private int numComponents;
	private transient String [] compName = null;

	// Cache of singletons for the predefined color spaces.
	private static ColorSpace sRGBspace;
	private static ColorSpace XYZspace;
	private static ColorSpace PYCCspace;
	private static ColorSpace GRAYspace;
	private static ColorSpace LINEAR_RGBspace;

	/**
	* Any of the family of XYZ color spaces.
	*/
	@Native public static final int TYPE_XYZ = 0;

	/**
	* Any of the family of Lab color spaces.
	*/
	@Native public static final int TYPE_Lab = 1;

	/**
	* Any of the family of Luv color spaces.
	*/
	@Native public static final int TYPE_Luv = 2;

	/**
	* Any of the family of YCbCr color spaces.
	*/
	@Native public static final int TYPE_YCbCr = 3;

	/**
	* Any of the family of Yxy color spaces.
	*/
	@Native public static final int TYPE_Yxy = 4;

	/**
	* Any of the family of RGB color spaces.
	*/
	@Native public static final int TYPE_RGB = 5;

	/**
	* Any of the family of GRAY color spaces.
	*/
	@Native public static final int TYPE_GRAY = 6;

	/**
	* Any of the family of HSV color spaces.
	*/
	@Native public static final int TYPE_HSV = 7;

	/**
	* Any of the family of HLS color spaces.
	*/
	@Native public static final int TYPE_HLS = 8;

	/**
	* Any of the family of CMYK color spaces.
	*/
	@Native public static final int TYPE_CMYK = 9;

	/**
	* Any of the family of CMY color spaces.
	*/
	@Native public static final int TYPE_CMY = 11;

	/**
	* Generic 2 component color spaces.
	*/
	@Native public static final int TYPE_2CLR = 12;

	/**
	* Generic 3 component color spaces.
	*/
	@Native public static final int TYPE_3CLR = 13;

	/**
	* Generic 4 component color spaces.
	*/
	@Native public static final int TYPE_4CLR = 14;

	/**
	* Generic 5 component color spaces.
	*/
	@Native public static final int TYPE_5CLR = 15;

	/**
	* Generic 6 component color spaces.
	*/
	@Native public static final int TYPE_6CLR = 16;

	/**
	* Generic 7 component color spaces.
	*/
	@Native public static final int TYPE_7CLR = 17;

	/**
	* Generic 8 component color spaces.
	*/
	@Native public static final int TYPE_8CLR = 18;

	/**
	* Generic 9 component color spaces.
	*/
	@Native public static final int TYPE_9CLR = 19;

	/**
	* Generic 10 component color spaces.
	*/
	@Native public static final int TYPE_ACLR = 20;

	/**
	* Generic 11 component color spaces.
	*/
	@Native public static final int TYPE_BCLR = 21;

	/**
	* Generic 12 component color spaces.
	*/
	@Native public static final int TYPE_CCLR = 22;

	/**
	* Generic 13 component color spaces.
	*/
	@Native public static final int TYPE_DCLR = 23;

	/**
	* Generic 14 component color spaces.
	*/
	@Native public static final int TYPE_ECLR = 24;

	/**
	* Generic 15 component color spaces.
	*/
	@Native public static final int TYPE_FCLR = 25;

	/**
	* The sRGB color space defined at
	* <A href="http://www.w3.org/pub/WWW/Graphics/Color/sRGB.html">
	* http://www.w3.org/pub/WWW/Graphics/Color/sRGB.html
	* </A>.
	*/
	@Native public static final int CS_sRGB = 1000;

	/**
	* A built-in linear RGB color space. This space is based on the
	* same RGB primaries as CS_sRGB, but has a linear tone reproduction curve.
	*/
	@Native public static final int CS_LINEAR_RGB = 1004;

	/**
	* The CIEXYZ conversion color space defined above.
	*/
	@Native public static final int CS_CIEXYZ = 1001;

	/**
	* The Photo YCC conversion color space.
	*/
	@Native public static final int CS_PYCC = 1002;

	/**
	* The built-in linear gray scale color space.
	*/
	@Native public static final int CS_GRAY = 1003;


	/**
	* Constructs a ColorSpace object given a color space type
	* and the number of components.
	* @param type one of the <CODE>ColorSpace</CODE> type constants
	* @param numcomponents the number of components in the color space
	*/
	protected ColorSpace (int type, int numcomponents) {
	this.type = type;
	this.numComponents = numcomponents;
	}


	/**
	* Returns a ColorSpace representing one of the specific
	* predefined color spaces.
	* @param colorspace a specific color space identified by one of
	* the predefined class constants (e.g. CS_sRGB, CS_LINEAR_RGB,
	* CS_CIEXYZ, CS_GRAY, or CS_PYCC)
	* @return the requested <CODE>ColorSpace</CODE> object
	*/
	// NOTE: This method may be called by privileged threads.
	// DO NOT INVOKE CLIENT CODE ON THIS THREAD!
	public static ColorSpace getInstance (int colorspace)
	{
	ColorSpace theColorSpace;

	switch (colorspace) {
	case CS_sRGB:
	synchronized(ColorSpace.class) {
	if (sRGBspace == null) {
	ICC_Profile theProfile = ICC_Profile.getInstance (CS_sRGB);
	sRGBspace = new ICC_ColorSpace (theProfile);
	}

	theColorSpace = sRGBspace;
	}
	break;

	case CS_CIEXYZ:
	synchronized(ColorSpace.class) {
	if (XYZspace == null) {
	ICC_Profile theProfile =
	ICC_Profile.getInstance (CS_CIEXYZ);
	XYZspace = new ICC_ColorSpace (theProfile);
	}

	theColorSpace = XYZspace;
	}
	break;

	case CS_PYCC:
	synchronized(ColorSpace.class) {
	if (PYCCspace == null) {
	ICC_Profile theProfile = ICC_Profile.getInstance (CS_PYCC);
	PYCCspace = new ICC_ColorSpace (theProfile);
	}

	theColorSpace = PYCCspace;
	}
	break;


	case CS_GRAY:
	synchronized(ColorSpace.class) {
	if (GRAYspace == null) {
	ICC_Profile theProfile = ICC_Profile.getInstance (CS_GRAY);
	GRAYspace = new ICC_ColorSpace (theProfile);
	/* to allow access from java.awt.ColorModel */
	CMSManager.GRAYspace = GRAYspace;
	}

	theColorSpace = GRAYspace;
	}
	break;


	case CS_LINEAR_RGB:
	synchronized(ColorSpace.class) {
	if (LINEAR_RGBspace == null) {
	ICC_Profile theProfile =
	ICC_Profile.getInstance(CS_LINEAR_RGB);
	LINEAR_RGBspace = new ICC_ColorSpace (theProfile);
	/* to allow access from java.awt.ColorModel */
	CMSManager.LINEAR_RGBspace = LINEAR_RGBspace;
	}

	theColorSpace = LINEAR_RGBspace;
	}
	break;


	default:
	throw new IllegalArgumentException ("Unknown color space");
	}

	return theColorSpace;
	}


	/**
	* Returns true if the ColorSpace is CS_sRGB.
	* @return <CODE>true</CODE> if this is a <CODE>CS_sRGB</CODE> color
	* space, <code>false</code> if it is not
	*/
	public boolean isCS_sRGB () {
	/* REMIND - make sure we know sRGBspace exists already */
	return (this == sRGBspace);
	}

	/**
	* Transforms a color value assumed to be in this ColorSpace
	* into a value in the default CS_sRGB color space.
	* <p>
	* This method transforms color values using algorithms designed
	* to produce the best perceptual match between input and output
	* colors. In order to do colorimetric conversion of color values,
	* you should use the <code>toCIEXYZ</code>
	* method of this color space to first convert from the input
	* color space to the CS_CIEXYZ color space, and then use the
	* <code>fromCIEXYZ</code> method of the CS_sRGB color space to
	* convert from CS_CIEXYZ to the output color space.
	* See {@link #toCIEXYZ(float[]) toCIEXYZ} and
	* {@link #fromCIEXYZ(float[]) fromCIEXYZ} for further information.
	* <p>
	* @param colorvalue a float array with length of at least the number
	* of components in this ColorSpace
	* @return a float array of length 3
	* @throws ArrayIndexOutOfBoundsException if array length is not
	* at least the number of components in this ColorSpace
	*/
	public abstract float[] toRGB(float[] colorvalue);


	/**
	* Transforms a color value assumed to be in the default CS_sRGB
	* color space into this ColorSpace.
	* <p>
	* This method transforms color values using algorithms designed
	* to produce the best perceptual match between input and output
	* colors. In order to do colorimetric conversion of color values,
	* you should use the <code>toCIEXYZ</code>
	* method of the CS_sRGB color space to first convert from the input
	* color space to the CS_CIEXYZ color space, and then use the
	* <code>fromCIEXYZ</code> method of this color space to
	* convert from CS_CIEXYZ to the output color space.
	* See {@link #toCIEXYZ(float[]) toCIEXYZ} and
	* {@link #fromCIEXYZ(float[]) fromCIEXYZ} for further information.
	* <p>
	* @param rgbvalue a float array with length of at least 3
	* @return a float array with length equal to the number of
	* components in this ColorSpace
	* @throws ArrayIndexOutOfBoundsException if array length is not
	* at least 3
	*/
	public abstract float[] fromRGB(float[] rgbvalue);


	/**
	* Transforms a color value assumed to be in this ColorSpace
	* into the CS_CIEXYZ conversion color space.
	* <p>
	* This method transforms color values using relative colorimetry,
	* as defined by the International Color Consortium standard. This
	* means that the XYZ values returned by this method are represented
	* relative to the D50 white point of the CS_CIEXYZ color space.
	* This representation is useful in a two-step color conversion
	* process in which colors are transformed from an input color
	* space to CS_CIEXYZ and then to an output color space. This
	* representation is not the same as the XYZ values that would
	* be measured from the given color value by a colorimeter.
	* A further transformation is necessary to compute the XYZ values
	* that would be measured using current CIE recommended practices.
	* See the {@link ICC_ColorSpace#toCIEXYZ(float[]) toCIEXYZ} method of
	* <code>ICC_ColorSpace</code> for further information.
	* <p>
	* @param colorvalue a float array with length of at least the number
	* of components in this ColorSpace
	* @return a float array of length 3
	* @throws ArrayIndexOutOfBoundsException if array length is not
	* at least the number of components in this ColorSpace.
	*/
	public abstract float[] toCIEXYZ(float[] colorvalue);


	/**
	* Transforms a color value assumed to be in the CS_CIEXYZ conversion
	* color space into this ColorSpace.
	* <p>
	* This method transforms color values using relative colorimetry,
	* as defined by the International Color Consortium standard. This
	* means that the XYZ argument values taken by this method are represented
	* relative to the D50 white point of the CS_CIEXYZ color space.
	* This representation is useful in a two-step color conversion
	* process in which colors are transformed from an input color
	* space to CS_CIEXYZ and then to an output color space. The color
	* values returned by this method are not those that would produce
	* the XYZ value passed to the method when measured by a colorimeter.
	* If you have XYZ values corresponding to measurements made using
	* current CIE recommended practices, they must be converted to D50
	* relative values before being passed to this method.
	* See the {@link ICC_ColorSpace#fromCIEXYZ(float[]) fromCIEXYZ} method of
	* <code>ICC_ColorSpace</code> for further information.
	* <p>
	* @param colorvalue a float array with length of at least 3
	* @return a float array with length equal to the number of
	* components in this ColorSpace
	* @throws ArrayIndexOutOfBoundsException if array length is not
	* at least 3
	*/
	public abstract float[] fromCIEXYZ(float[] colorvalue);

	/**
	* Returns the color space type of this ColorSpace (for example
	* TYPE_RGB, TYPE_XYZ, ...). The type defines the
	* number of components of the color space and the interpretation,
	* e.g. TYPE_RGB identifies a color space with three components - red,
	* green, and blue. It does not define the particular color
	* characteristics of the space, e.g. the chromaticities of the
	* primaries.
	*
	* @return the type constant that represents the type of this
	* <CODE>ColorSpace</CODE>
	*/
	public int getType() {
	return type;
	}

	/**
	* Returns the number of components of this ColorSpace.
	* @return The number of components in this <CODE>ColorSpace</CODE>.
	*/
	public int getNumComponents() {
	return numComponents;
	}

	/**
	* Returns the name of the component given the component index.
	*
	* @param idx the component index
	* @return the name of the component at the specified index
	* @throws IllegalArgumentException if <code>idx</code> is
	* less than 0 or greater than numComponents - 1
	*/
	public String getName (int idx) {
	/* REMIND - handle common cases here */
	if ((idx < 0) \|\| (idx > numComponents - 1)) {
	throw new IllegalArgumentException(
	"Component index out of range: " + idx);
	}

	if (compName == null) {
	switch (type) {
	case ColorSpace.TYPE_XYZ:
	compName = new String[] {"X", "Y", "Z"};
	break;
	case ColorSpace.TYPE_Lab:
	compName = new String[] {"L", "a", "b"};
	break;
	case ColorSpace.TYPE_Luv:
	compName = new String[] {"L", "u", "v"};
	break;
	case ColorSpace.TYPE_YCbCr:
	compName = new String[] {"Y", "Cb", "Cr"};
	break;
	case ColorSpace.TYPE_Yxy:
	compName = new String[] {"Y", "x", "y"};
	break;
	case ColorSpace.TYPE_RGB:
	compName = new String[] {"Red", "Green", "Blue"};
	break;
	case ColorSpace.TYPE_GRAY:
	compName = new String[] {"Gray"};
	break;
	case ColorSpace.TYPE_HSV:
	compName = new String[] {"Hue", "Saturation", "Value"};
	break;
	case ColorSpace.TYPE_HLS:
	compName = new String[] {"Hue", "Lightness",
	"Saturation"};
	break;
	case ColorSpace.TYPE_CMYK:
	compName = new String[] {"Cyan", "Magenta", "Yellow",
	"Black"};
	break;
	case ColorSpace.TYPE_CMY:
	compName = new String[] {"Cyan", "Magenta", "Yellow"};
	break;
	default:
	String [] tmp = new String[numComponents];
	for (int i = 0; i < tmp.length; i++) {
	tmp[i] = "Unnamed color component(" + i + ")";
	}
	compName = tmp;
	}
	}
	return compName[idx];
	}

	/**
	* Returns the minimum normalized color component value for the
	* specified component. The default implementation in this abstract
	* class returns 0.0 for all components. Subclasses should override
	* this method if necessary.
	*
	* @param component the component index
	* @return the minimum normalized component value
	* @throws IllegalArgumentException if component is less than 0 or
	* greater than numComponents - 1
	* @since 1.4
	*/
	public float getMinValue(int component) {
	if ((component < 0) \|\| (component > numComponents - 1)) {
	throw new IllegalArgumentException(
	"Component index out of range: " + component);
	}
	return 0.0f;
	}

	/**
	* Returns the maximum normalized color component value for the
	* specified component. The default implementation in this abstract
	* class returns 1.0 for all components. Subclasses should override
	* this method if necessary.
	*
	* @param component the component index
	* @return the maximum normalized component value
	* @throws IllegalArgumentException if component is less than 0 or
	* greater than numComponents - 1
	* @since 1.4
	*/
	public float getMaxValue(int component) {
	if ((component < 0) \|\| (component > numComponents - 1)) {
	throw new IllegalArgumentException(
	"Component index out of range: " + component);
	}
	return 1.0f;
	}

	/* Returns true if cspace is the XYZspace.
	*/
	static boolean isCS_CIEXYZ(ColorSpace cspace) {
	return (cspace == XYZspace);
	}
	}

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