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products/Sources/formale Sprachen/Java/Openjdk/src/java.desktop/share/classes/java/awt/ (Sun/Oracle ^©) Datei vom 13.11.2022 mit Größe 43 kB

Quelle Color.java Sprache: JAVA

/*
* Copyright (c) 1995, 2021, 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.
*/

package java.awt;

import java.awt.color.ColorSpace;
import java.awt.geom.AffineTransform;
import java.awt.geom.Rectangle2D;
import java.awt.image.ColorModel;
import java.beans.ConstructorProperties;
import java.io.Serial;

/**
* The {@code Color} class is used to encapsulate colors in the default
* sRGB color space or colors in arbitrary color spaces identified by a
* {@link ColorSpace}. Every color has an implicit alpha value of 1.0 or
* an explicit one provided in the constructor. The alpha value
* defines the transparency of a color and can be represented by
* a float value in the range 0.0 - 1.0 or 0 - 255.
* An alpha value of 1.0 or 255 means that the color is completely
* opaque and an alpha value of 0 or 0.0 means that the color is
* completely transparent.
* When constructing a {@code Color} with an explicit alpha or
* getting the color/alpha components of a {@code Color}, the color
* components are never premultiplied by the alpha component.
* 
* The default color space for the Java 2D(tm) API is sRGB, a proposed
* standard RGB color space. For further information on sRGB,
* see <A href="http://www.w3.org/pub/WWW/Graphics/Color/sRGB.html">
* http://www.w3.org/pub/WWW/Graphics/Color/sRGB.html
* </A>.
*
* @version 10 Feb 1997
* @author Sami Shaio
* @author Arthur van Hoff
* @see ColorSpace
* @see AlphaComposite
*/
public class Color implements Paint, java.io.Serializable {

 /**
 * The color white. In the default sRGB space.
 */
 public static final Color white = new Color(255, 255, 255);

 /**
 * The color white. In the default sRGB space.
 * @since 1.4
 */
 public static final Color WHITE = white;

 /**
 * The color light gray. In the default sRGB space.
 */
 public static final Color lightGray = new Color(192, 192, 192);

 /**
 * The color light gray. In the default sRGB space.
 * @since 1.4
 */
 public static final Color LIGHT_GRAY = lightGray;

 /**
 * The color gray. In the default sRGB space.
 */
 public static final Color gray = new Color(128, 128, 128);

 /**
 * The color gray. In the default sRGB space.
 * @since 1.4
 */
 public static final Color GRAY = gray;

 /**
 * The color dark gray. In the default sRGB space.
 */
 public static final Color darkGray = new Color(64, 64, 64);

 /**
 * The color dark gray. In the default sRGB space.
 * @since 1.4
 */
 public static final Color DARK_GRAY = darkGray;

 /**
 * The color black. In the default sRGB space.
 */
 public static final Color black = new Color(0, 0, 0);

 /**
 * The color black. In the default sRGB space.
 * @since 1.4
 */
 public static final Color BLACK = black;

 /**
 * The color red. In the default sRGB space.
 */
 public static final Color red = new Color(255, 0, 0);

 /**
 * The color red. In the default sRGB space.
 * @since 1.4
 */
 public static final Color RED = red;

 /**
 * The color pink. In the default sRGB space.
 */
 public static final Color pink = new Color(255, 175, 175);

 /**
 * The color pink. In the default sRGB space.
 * @since 1.4
 */
 public static final Color PINK = pink;

 /**
 * The color orange. In the default sRGB space.
 */
 public static final Color orange = new Color(255, 200, 0);

 /**
 * The color orange. In the default sRGB space.
 * @since 1.4
 */
 public static final Color ORANGE = orange;

 /**
 * The color yellow. In the default sRGB space.
 */
 public static final Color yellow = new Color(255, 255, 0);

 /**
 * The color yellow. In the default sRGB space.
 * @since 1.4
 */
 public static final Color YELLOW = yellow;

 /**
 * The color green. In the default sRGB space.
 */
 public static final Color green = new Color(0, 255, 0);

 /**
 * The color green. In the default sRGB space.
 * @since 1.4
 */
 public static final Color GREEN = green;

 /**
 * The color magenta. In the default sRGB space.
 */
 public static final Color magenta = new Color(255, 0, 255);

 /**
 * The color magenta. In the default sRGB space.
 * @since 1.4
 */
 public static final Color MAGENTA = magenta;

 /**
 * The color cyan. In the default sRGB space.
 */
 public static final Color cyan = new Color(0, 255, 255);

 /**
 * The color cyan. In the default sRGB space.
 * @since 1.4
 */
 public static final Color CYAN = cyan;

 /**
 * The color blue. In the default sRGB space.
 */
 public static final Color blue = new Color(0, 0, 255);

 /**
 * The color blue. In the default sRGB space.
 * @since 1.4
 */
 public static final Color BLUE = blue;

 /**
 * The color value.
 * @serial
 * @see #getRGB
 */
 int value;

 /**
 * The color value in the default sRGB {@code ColorSpace} as
 * {@code float} components (no alpha).
 * If {@code null} after object construction, this must be an
 * sRGB color constructed with 8-bit precision, so compute from the
 * {@code int} color value.
 * @serial
 * @see #getRGBColorComponents
 * @see #getRGBComponents
 */
 private float[] frgbvalue = null;

 /**
 * The color value in the native {@code ColorSpace} as
 * {@code float} components (no alpha).
 * If {@code null} after object construction, this must be an
 * sRGB color constructed with 8-bit precision, so compute from the
 * {@code int} color value.
 * @serial
 * @see #getRGBColorComponents
 * @see #getRGBComponents
 */
 private float[] fvalue = null;

 /**
 * The alpha value as a {@code float} component.
 * If {@code frgbvalue} is {@code null}, this is not valid
 * data, so compute from the {@code int} color value.
 * @serial
 * @see #getRGBComponents
 * @see #getComponents
 */
 private float falpha = 0.0f;

 /**
 * The {@code ColorSpace}. If {@code null}, then it's
 * default is sRGB.
 * @serial
 * @see #getColor
 * @see #getColorSpace
 * @see #getColorComponents
 */
 private ColorSpace cs = null;

 /**
 * Use serialVersionUID from JDK 1.1 for interoperability.
 */
 @Serial
 private static final long serialVersionUID = 118526816881161077L;

 /**
 * Initialize JNI field and method IDs
 */
 private static native void initIDs();

 static {
 /** 4112352 - Calling getDefaultToolkit()
 ** here can cause this class to be accessed before it is fully
 ** initialized. DON'T DO IT!!!
 **
 ** Toolkit.getDefaultToolkit();
 **/

 /* ensure that the necessary native libraries are loaded */
 Toolkit.loadLibraries();
 if (!GraphicsEnvironment.isHeadless()) {
 initIDs();
 }
 }

 /**
 * Checks the color integer components supplied for validity.
 * Throws an {@link IllegalArgumentException} if the value is out of
 * range.
 * @param r the Red component
 * @param g the Green component
 * @param b the Blue component
 **/
 private static void testColorValueRange(int r, int g, int b, int a) {
 boolean rangeError = false;
 String badComponentString = "";

 if ( a < 0 || a > 255) {
 rangeError = true;
 badComponentString = badComponentString + " Alpha";
 }
 if ( r < 0 || r > 255) {
 rangeError = true;
 badComponentString = badComponentString + " Red";
 }
 if ( g < 0 || g > 255) {
 rangeError = true;
 badComponentString = badComponentString + " Green";
 }
 if ( b < 0 || b > 255) {
 rangeError = true;
 badComponentString = badComponentString + " Blue";
 }
 if ( rangeError == true ) {
 throw new IllegalArgumentException("Color parameter outside of expected range:"
 + badComponentString);
 }
 }

 /**
 * Checks the color {@code float} components supplied for
 * validity.
 * Throws an {@code IllegalArgumentException} if the value is out
 * of range.
 * @param r the Red component
 * @param g the Green component
 * @param b the Blue component
 **/
 private static void testColorValueRange(float r, float g, float b, float a) {
 boolean rangeError = false;
 String badComponentString = "";
 if ( a < 0.0 || a > 1.0) {
 rangeError = true;
 badComponentString = badComponentString + " Alpha";
 }
 if ( r < 0.0 || r > 1.0) {
 rangeError = true;
 badComponentString = badComponentString + " Red";
 }
 if ( g < 0.0 || g > 1.0) {
 rangeError = true;
 badComponentString = badComponentString + " Green";
 }
 if ( b < 0.0 || b > 1.0) {
 rangeError = true;
 badComponentString = badComponentString + " Blue";
 }
 if ( rangeError == true ) {
 throw new IllegalArgumentException("Color parameter outside of expected range:"
 + badComponentString);
 }
 }

 /**
 * Creates an opaque sRGB color with the specified red, green,
 * and blue values in the range (0 - 255).
 * The actual color used in rendering depends
 * on finding the best match given the color space
 * available for a given output device.
 * Alpha is defaulted to 255.
 *
 * @throws IllegalArgumentException if {@code r}, {@code g}
 * or {@code b} are outside of the range
 * 0 to 255, inclusive
 * @param r the red component
 * @param g the green component
 * @param b the blue component
 * @see #getRed
 * @see #getGreen
 * @see #getBlue
 * @see #getRGB
 */
 public Color(int r, int g, int b) {
 this(r, g, b, 255);
 }

 /**
 * Creates an sRGB color with the specified red, green, blue, and alpha
 * values in the range (0 - 255).
 *
 * @throws IllegalArgumentException if {@code r}, {@code g},
 * {@code b} or {@code a} are outside of the range
 * 0 to 255, inclusive
 * @param r the red component
 * @param g the green component
 * @param b the blue component
 * @param a the alpha component
 * @see #getRed
 * @see #getGreen
 * @see #getBlue
 * @see #getAlpha
 * @see #getRGB
 */
 @ConstructorProperties({"red", "green", "blue", "alpha"})
 public Color(int r, int g, int b, int a) {
 value = ((a & 0xFF) << 24) |
 ((r & 0xFF) << 16) |
 ((g & 0xFF) << 8) |
 ((b & 0xFF) << 0);
 testColorValueRange(r,g,b,a);
 }

 /**
 * Creates an opaque sRGB color with the specified combined RGB value
 * consisting of the red component in bits 16-23, the green component
 * in bits 8-15, and the blue component in bits 0-7. The actual color
 * used in rendering depends on finding the best match given the
 * color space available for a particular output device. Alpha is
 * defaulted to 255.
 *
 * @param rgb the combined RGB components
 * @see java.awt.image.ColorModel#getRGBdefault
 * @see #getRed
 * @see #getGreen
 * @see #getBlue
 * @see #getRGB
 */
 public Color(int rgb) {
 value = 0xff000000 | rgb;
 }

 /**
 * Creates an sRGB color with the specified combined RGBA value consisting
 * of the alpha component in bits 24-31, the red component in bits 16-23,
 * the green component in bits 8-15, and the blue component in bits 0-7.
 * If the {@code hasalpha} argument is {@code false}, alpha
 * is defaulted to 255.
 *
 * @param rgba the combined RGBA components
 * @param hasalpha {@code true} if the alpha bits are valid;
 * {@code false} otherwise
 * @see java.awt.image.ColorModel#getRGBdefault
 * @see #getRed
 * @see #getGreen
 * @see #getBlue
 * @see #getAlpha
 * @see #getRGB
 */
 public Color(int rgba, boolean hasalpha) {
 if (hasalpha) {
 value = rgba;
 } else {
 value = 0xff000000 | rgba;
 }
 }

 /**
 * Creates an opaque sRGB color with the specified red, green, and blue
 * values in the range (0.0 - 1.0). Alpha is defaulted to 1.0. The
 * actual color used in rendering depends on finding the best
 * match given the color space available for a particular output
 * device.
 *
 * @throws IllegalArgumentException if {@code r}, {@code g}
 * or {@code b} are outside of the range
 * 0.0 to 1.0, inclusive
 * @param r the red component
 * @param g the green component
 * @param b the blue component
 * @see #getRed
 * @see #getGreen
 * @see #getBlue
 * @see #getRGB
 */
 public Color(float r, float g, float b) {
 this( (int) (r*255+0.5), (int) (g*255+0.5), (int) (b*255+0.5));
 testColorValueRange(r,g,b,1.0f);
 frgbvalue = new float[3];
 frgbvalue[0] = r;
 frgbvalue[1] = g;
 frgbvalue[2] = b;
 falpha = 1.0f;
 fvalue = frgbvalue;
 }

 /**
 * Creates an sRGB color with the specified red, green, blue, and
 * alpha values in the range (0.0 - 1.0). The actual color
 * used in rendering depends on finding the best match given the
 * color space available for a particular output device.
 * @throws IllegalArgumentException if {@code r}, {@code g}
 * {@code b} or {@code a} are outside of the range
 * 0.0 to 1.0, inclusive
 * @param r the red component
 * @param g the green component
 * @param b the blue component
 * @param a the alpha component
 * @see #getRed
 * @see #getGreen
 * @see #getBlue
 * @see #getAlpha
 * @see #getRGB
 */
 public Color(float r, float g, float b, float a) {
 this((int)(r*255+0.5), (int)(g*255+0.5), (int)(b*255+0.5), (int)(a*255+0.5));
 frgbvalue = new float[3];
 frgbvalue[0] = r;
 frgbvalue[1] = g;
 frgbvalue[2] = b;
 falpha = a;
 fvalue = frgbvalue;
 }

 /**
 * Creates a color in the specified {@code ColorSpace}
 * with the color components specified in the {@code float}
 * array and the specified alpha. The number of components is
 * determined by the type of the {@code ColorSpace}. For
 * example, RGB requires 3 components, but CMYK requires 4
 * components.
 * @param cspace the {@code ColorSpace} to be used to
 * interpret the components
 * @param components an arbitrary number of color components
 * that is compatible with the {@code ColorSpace}
 * @param alpha alpha value
 * @throws IllegalArgumentException if any of the values in the
 * {@code components} array or {@code alpha} is
 * outside of the range 0.0 to 1.0
 * @see #getComponents
 * @see #getColorComponents
 */
 public Color(ColorSpace cspace, float[] components, float alpha) {
 boolean rangeError = false;
 String badComponentString = "";
 int n = cspace.getNumComponents();
 fvalue = new float[n];
 for (int i = 0; i < n; i++) {
 if (components[i] < 0.0 || components[i] > 1.0) {
 rangeError = true;
 badComponentString = badComponentString + "Component " + i
 + " ";
 } else {
 fvalue[i] = components[i];
 }
 }
 if (alpha < 0.0 || alpha > 1.0) {
 rangeError = true;
 badComponentString = badComponentString + "Alpha";
 } else {
 falpha = alpha;
 }
 if (rangeError) {
 throw new IllegalArgumentException(
 "Color parameter outside of expected range: " +
 badComponentString);
 }
 frgbvalue = cspace.toRGB(fvalue);
 cs = cspace;
 value = ((((int)(falpha*255)) & 0xFF) << 24) |
 ((((int)(frgbvalue[0]*255)) & 0xFF) << 16) |
 ((((int)(frgbvalue[1]*255)) & 0xFF) << 8) |
 ((((int)(frgbvalue[2]*255)) & 0xFF) << 0);
 }

 /**
 * Returns the red component in the range 0-255 in the default sRGB
 * space.
 * @return the red component.
 * @see #getRGB
 */
 public int getRed() {
 return (getRGB() >> 16) & 0xFF;
 }

 /**
 * Returns the green component in the range 0-255 in the default sRGB
 * space.
 * @return the green component.
 * @see #getRGB
 */
 public int getGreen() {
 return (getRGB() >> 8) & 0xFF;
 }

 /**
 * Returns the blue component in the range 0-255 in the default sRGB
 * space.
 * @return the blue component.
 * @see #getRGB
 */
 public int getBlue() {
 return (getRGB() >> 0) & 0xFF;
 }

 /**
 * Returns the alpha component in the range 0-255.
 * @return the alpha component.
 * @see #getRGB
 */
 public int getAlpha() {
 return (getRGB() >> 24) & 0xff;
 }

 /**
 * Returns the RGB value representing the color in the default sRGB
 * {@link ColorModel}.
 * (Bits 24-31 are alpha, 16-23 are red, 8-15 are green, 0-7 are
 * blue).
 * @return the RGB value of the color in the default sRGB
 * {@code ColorModel}.
 * @see java.awt.image.ColorModel#getRGBdefault
 * @see #getRed
 * @see #getGreen
 * @see #getBlue
 * @since 1.0
 */
 public int getRGB() {
 return value;
 }

 private static final double FACTOR = 0.7;

 /**
 * Creates a new {@code Color} that is a brighter version of this
 * {@code Color}.
 * 
 * This method applies an arbitrary scale factor to each of the three RGB
 * components of this {@code Color} to create a brighter version
 * of this {@code Color}.
 * The {@code alpha} value is preserved.
 * Although {@code brighter} and
 * {@code darker} are inverse operations, the results of a
 * series of invocations of these two methods might be inconsistent
 * because of rounding errors.
 * @return a new {@code Color} object that is
 * a brighter version of this {@code Color}
 * with the same {@code alpha} value.
 * @see java.awt.Color#darker
 * @since 1.0
 */
 public Color brighter() {
 int r = getRed();
 int g = getGreen();
 int b = getBlue();
 int alpha = getAlpha();

 /* From 2D group:
 * 1. black.brighter() should return grey
 * 2. applying brighter to blue will always return blue, brighter
 * 3. non pure color (non zero rgb) will eventually return white
 */
 int i = (int)(1.0/(1.0-FACTOR));
 if ( r == 0 && g == 0 && b == 0) {
 return new Color(i, i, i, alpha);
 }
 if ( r > 0 && r 0 && g 0 && b < i ) b = i;

 return new Color(Math.min((int)(r/FACTOR), 255),
 Math.min((int)(g/FACTOR), 255),
 Math.min((int)(b/FACTOR), 255),
 alpha);
 }

 /**
 * Creates a new {@code Color} that is a darker version of this
 * {@code Color}.
 * 
 * This method applies an arbitrary scale factor to each of the three RGB
 * components of this {@code Color} to create a darker version of
 * this {@code Color}.
 * The {@code alpha} value is preserved.
 * Although {@code brighter} and
 * {@code darker} are inverse operations, the results of a series
 * of invocations of these two methods might be inconsistent because
 * of rounding errors.
 * @return a new {@code Color} object that is
 * a darker version of this {@code Color}
 * with the same {@code alpha} value.
 * @see java.awt.Color#brighter
 * @since 1.0
 */
 public Color darker() {
 return new Color(Math.max((int)(getRed() *FACTOR), 0),
 Math.max((int)(getGreen()*FACTOR), 0),
 Math.max((int)(getBlue() *FACTOR), 0),
 getAlpha());
 }

 /**
 * Computes the hash code for this {@code Color}.
 * @return a hash code value for this object.
 * @since 1.0
 */
 public int hashCode() {
 return value;
 }

 /**
 * Determines whether another object is equal to this
 * {@code Color}.
 * 
 * The result is {@code true} if and only if the argument is not
 * {@code null} and is a {@code Color} object that has the same
 * red, green, blue, and alpha values as this object.
 * @param obj the object to test for equality with this
 * {@code Color}
 * @return {@code true} if the objects are the same;
 * {@code false} otherwise.
 * @since 1.0
 */
 public boolean equals(Object obj) {
 return obj instanceof Color && ((Color)obj).getRGB() == this.getRGB();
 }

 /**
 * Returns a string representation of this {@code Color}. This
 * method is intended to be used only for debugging purposes. The
 * content and format of the returned string might vary between
 * implementations. The returned string might be empty but cannot
 * be {@code null}.
 *
 * @return a string representation of this {@code Color}.
 */
 public String toString() {
 return getClass().getName() + "[r=" + getRed() + ",g=" + getGreen() + ",b=" + getBlue() + "]";
 }

 /**
 * Converts a {@code String} to an integer and returns the
 * specified opaque {@code Color}. This method handles string
 * formats that are used to represent octal and hexadecimal numbers.
 * @param nm a {@code String} that represents
 * an opaque color as a 24-bit integer
 * @return the new {@code Color} object.
 * @see java.lang.Integer#decode
 * @throws NumberFormatException if the specified string cannot
 * be interpreted as a decimal,
 * octal, or hexadecimal integer.
 * @since 1.1
 */
 public static Color decode(String nm) throws NumberFormatException {
 Integer intval = Integer.decode(nm);
 int i = intval.intValue();
 return new Color((i >> 16) & 0xFF, (i >> 8) & 0xFF, i & 0xFF);
 }

 /**
 * Finds a color in the system properties.
 * 
 * The argument is treated as the name of a system property to
 * be obtained. The string value of this property is then interpreted
 * as an integer which is then converted to a {@code Color}
 * object.
 * 
 * If the specified property is not found or could not be parsed as
 * an integer then {@code null} is returned.
 * @param nm the name of the color property
 * @return the {@code Color} converted from the system
 * property.
 * @see java.lang.System#getProperty(java.lang.String)
 * @see java.lang.Integer#getInteger(java.lang.String)
 * @see java.awt.Color#Color(int)
 * @since 1.0
 */
 public static Color getColor(String nm) {
 return getColor(nm, null);
 }

 /**
 * Finds a color in the system properties.
 * 
 * The first argument is treated as the name of a system property to
 * be obtained. The string value of this property is then interpreted
 * as an integer which is then converted to a {@code Color}
 * object.
 * 
 * If the specified property is not found or cannot be parsed as
 * an integer then the {@code Color} specified by the second
 * argument is returned instead.
 * @param nm the name of the color property
 * @param v the default {@code Color}
 * @return the {@code Color} converted from the system
 * property, or the specified {@code Color}.
 * @see java.lang.System#getProperty(java.lang.String)
 * @see java.lang.Integer#getInteger(java.lang.String)
 * @see java.awt.Color#Color(int)
 * @since 1.0
 */
 public static Color getColor(String nm, Color v) {
 Integer intval = Integer.getInteger(nm);
 if (intval == null) {
 return v;
 }
 int i = intval.intValue();
 return new Color((i >> 16) & 0xFF, (i >> 8) & 0xFF, i & 0xFF);
 }

 /**
 * Finds a color in the system properties.
 * 
 * The first argument is treated as the name of a system property to
 * be obtained. The string value of this property is then interpreted
 * as an integer which is then converted to a {@code Color}
 * object.
 * 
 * If the specified property is not found or could not be parsed as
 * an integer then the integer value {@code v} is used instead,
 * and is converted to a {@code Color} object.
 * @param nm the name of the color property
 * @param v the default color value, as an integer
 * @return the {@code Color} converted from the system
 * property or the {@code Color} converted from
 * the specified integer.
 * @see java.lang.System#getProperty(java.lang.String)
 * @see java.lang.Integer#getInteger(java.lang.String)
 * @see java.awt.Color#Color(int)
 * @since 1.0
 */
 public static Color getColor(String nm, int v) {
 Integer intval = Integer.getInteger(nm);
 int i = (intval != null) ? intval.intValue() : v;
 return new Color((i >> 16) & 0xFF, (i >> 8) & 0xFF, (i >> 0) & 0xFF);
 }

 /**
 * Converts the components of a color, as specified by the HSB
 * model, to an equivalent set of values for the default RGB model.
 * 
 * The {@code saturation} and {@code brightness} components
 * should be floating-point values between zero and one
 * (numbers in the range 0.0-1.0). The {@code hue} component
 * can be any floating-point number. The floor of this number is
 * subtracted from it to create a fraction between 0 and 1. This
 * fractional number is then multiplied by 360 to produce the hue
 * angle in the HSB color model.
 * 
 * The integer that is returned by {@code HSBtoRGB} encodes the
 * value of a color in bits 0-23 of an integer value that is the same
 * format used by the method {@link #getRGB() getRGB}.
 * This integer can be supplied as an argument to the
 * {@code Color} constructor that takes a single integer argument.
 * @param hue the hue component of the color
 * @param saturation the saturation of the color
 * @param brightness the brightness of the color
 * @return the RGB value of the color with the indicated hue,
 * saturation, and brightness.
 * @see java.awt.Color#getRGB()
 * @see java.awt.Color#Color(int)
 * @see java.awt.image.ColorModel#getRGBdefault()
 * @since 1.0
 */
 public static int HSBtoRGB(float hue, float saturation, float brightness) {
 int r = 0, g = 0, b = 0;
 if (saturation == 0) {
 r = g = b = (int) (brightness * 255.0f + 0.5f);
 } else {
 float h = (hue - (float)Math.floor(hue)) * 6.0f;
 float f = h - (float)java.lang.Math.floor(h);
 float p = brightness * (1.0f - saturation);
 float q = brightness * (1.0f - saturation * f);
 float t = brightness * (1.0f - (saturation * (1.0f - f)));
 switch ((int) h) {
 case 0:
 r = (int) (brightness * 255.0f + 0.5f);
 g = (int) (t * 255.0f + 0.5f);
 b = (int) (p * 255.0f + 0.5f);
 break;
 case 1:
 r = (int) (q * 255.0f + 0.5f);
 g = (int) (brightness * 255.0f + 0.5f);
 b = (int) (p * 255.0f + 0.5f);
 break;
 case 2:
 r = (int) (p * 255.0f + 0.5f);
 g = (int) (brightness * 255.0f + 0.5f);
 b = (int) (t * 255.0f + 0.5f);
 break;
 case 3:
 r = (int) (p * 255.0f + 0.5f);
 g = (int) (q * 255.0f + 0.5f);
 b = (int) (brightness * 255.0f + 0.5f);
 break;
 case 4:
 r = (int) (t * 255.0f + 0.5f);
 g = (int) (p * 255.0f + 0.5f);
 b = (int) (brightness * 255.0f + 0.5f);
 break;
 case 5:
 r = (int) (brightness * 255.0f + 0.5f);
 g = (int) (p * 255.0f + 0.5f);
 b = (int) (q * 255.0f + 0.5f);
 break;
 }
 }
 return 0xff000000 | (r << 16) | (g << 8) | (b << 0);
 }

 /**
 * Converts the components of a color, as specified by the default RGB
 * model, to an equivalent set of values for hue, saturation, and
 * brightness that are the three components of the HSB model.
 * 
 * If the {@code hsbvals} argument is {@code null}, then a
 * new array is allocated to return the result. Otherwise, the method
 * returns the array {@code hsbvals}, with the values put into
 * that array.
 * @param r the red component of the color
 * @param g the green component of the color
 * @param b the blue component of the color
 * @param hsbvals the array used to return the
 * three HSB values, or {@code null}
 * @return an array of three elements containing the hue, saturation,
 * and brightness (in that order), of the color with
 * the indicated red, green, and blue components.
 * @see java.awt.Color#getRGB()
 * @see java.awt.Color#Color(int)
 * @see java.awt.image.ColorModel#getRGBdefault()
 * @since 1.0
 */
 public static float[] RGBtoHSB(int r, int g, int b, float[] hsbvals) {
 float hue, saturation, brightness;
 if (hsbvals == null) {
 hsbvals = new float[3];
 }
 int cmax = (r > g) ? r : g;
 if (b > cmax) cmax = b;
 int cmin = (r < g) ? r : g;
 if (b < cmin) cmin = b;

 brightness = ((float) cmax) / 255.0f;
 if (cmax != 0)
 saturation = ((float) (cmax - cmin)) / ((float) cmax);
 else
 saturation = 0;
 if (saturation == 0)
 hue = 0;
 else {
 float redc = ((float) (cmax - r)) / ((float) (cmax - cmin));
 float greenc = ((float) (cmax - g)) / ((float) (cmax - cmin));
 float bluec = ((float) (cmax - b)) / ((float) (cmax - cmin));
 if (r == cmax)
 hue = bluec - greenc;
 else if (g == cmax)
 hue = 2.0f + redc - bluec;
 else
 hue = 4.0f + greenc - redc;
 hue = hue / 6.0f;
 if (hue < 0)
 hue = hue + 1.0f;
 }
 hsbvals[0] = hue;
 hsbvals[1] = saturation;
 hsbvals[2] = brightness;
 return hsbvals;
 }

 /**
 * Creates a {@code Color} object based on the specified values
 * for the HSB color model.
 * 
 * The {@code s} and {@code b} components should be
 * floating-point values between zero and one
 * (numbers in the range 0.0-1.0). The {@code h} component
 * can be any floating-point number. The floor of this number is
 * subtracted from it to create a fraction between 0 and 1. This
 * fractional number is then multiplied by 360 to produce the hue
 * angle in the HSB color model.
 * @param h the hue component
 * @param s the saturation of the color
 * @param b the brightness of the color
 * @return a {@code Color} object with the specified hue,
 * saturation, and brightness.
 * @since 1.0
 */
 public static Color getHSBColor(float h, float s, float b) {
 return new Color(HSBtoRGB(h, s, b));
 }

 /**
 * Returns a {@code float} array containing the color and alpha
 * components of the {@code Color}, as represented in the default
 * sRGB color space.
 * If {@code compArray} is {@code null}, an array of length
 * 4 is created for the return value. Otherwise,
 * {@code compArray} must have length 4 or greater,
 * and it is filled in with the components and returned.
 * @param compArray an array that this method fills with
 * color and alpha components and returns
 * @return the RGBA components in a {@code float} array.
 */
 public float[] getRGBComponents(float[] compArray) {
 float[] f;
 if (compArray == null) {
 f = new float[4];
 } else {
 f = compArray;
 }
 if (frgbvalue == null) {
 f[0] = ((float)getRed())/255f;
 f[1] = ((float)getGreen())/255f;
 f[2] = ((float)getBlue())/255f;
 f[3] = ((float)getAlpha())/255f;
 } else {
 f[0] = frgbvalue[0];
 f[1] = frgbvalue[1];
 f[2] = frgbvalue[2];
 f[3] = falpha;
 }
 return f;
 }

 /**
 * Returns a {@code float} array containing only the color
 * components of the {@code Color}, in the default sRGB color
 * space. If {@code compArray} is {@code null}, an array of
 * length 3 is created for the return value. Otherwise,
 * {@code compArray} must have length 3 or greater, and it is
 * filled in with the components and returned.
 * @param compArray an array that this method fills with color
 * components and returns
 * @return the RGB components in a {@code float} array.
 */
 public float[] getRGBColorComponents(float[] compArray) {
 float[] f;
 if (compArray == null) {
 f = new float[3];
 } else {
 f = compArray;
 }
 if (frgbvalue == null) {
 f[0] = ((float)getRed())/255f;
 f[1] = ((float)getGreen())/255f;
 f[2] = ((float)getBlue())/255f;
 } else {
 f[0] = frgbvalue[0];
 f[1] = frgbvalue[1];
 f[2] = frgbvalue[2];
 }
 return f;
 }

 /**
 * Returns a {@code float} array containing the color and alpha
 * components of the {@code Color}, in the
 * {@code ColorSpace} of the {@code Color}.
 * If {@code compArray} is {@code null}, an array with
 * length equal to the number of components in the associated
 * {@code ColorSpace} plus one is created for
 * the return value. Otherwise, {@code compArray} must have at
 * least this length and it is filled in with the components and
 * returned.
 * @param compArray an array that this method fills with the color and
 * alpha components of this {@code Color} in its
 * {@code ColorSpace} and returns
 * @return the color and alpha components in a {@code float}
 * array.
 */
 public float[] getComponents(float[] compArray) {
 if (fvalue == null)
 return getRGBComponents(compArray);
 float[] f;
 int n = fvalue.length;
 if (compArray == null) {
 f = new float[n + 1];
 } else {
 f = compArray;
 }
 for (int i = 0; i < n; i++) {
 f[i] = fvalue[i];
 }
 f[n] = falpha;
 return f;
 }

 /**
 * Returns a {@code float} array containing only the color
 * components of the {@code Color}, in the
 * {@code ColorSpace} of the {@code Color}.
 * If {@code compArray} is {@code null}, an array with
 * length equal to the number of components in the associated
 * {@code ColorSpace} is created for
 * the return value. Otherwise, {@code compArray} must have at
 * least this length and it is filled in with the components and
 * returned.
 * @param compArray an array that this method fills with the color
 * components of this {@code Color} in its
 * {@code ColorSpace} and returns
 * @return the color components in a {@code float} array.
 */
 public float[] getColorComponents(float[] compArray) {
 if (fvalue == null)
 return getRGBColorComponents(compArray);
 float[] f;
 int n = fvalue.length;
 if (compArray == null) {
 f = new float[n];
 } else {
 f = compArray;
 }
 for (int i = 0; i < n; i++) {
 f[i] = fvalue[i];
 }
 return f;
 }

 /**
 * Returns a {@code float} array containing the color and alpha
 * components of the {@code Color}, in the
 * {@code ColorSpace} specified by the {@code cspace}
 * parameter. If {@code compArray} is {@code null}, an
 * array with length equal to the number of components in
 * {@code cspace} plus one is created for the return value.
 * Otherwise, {@code compArray} must have at least this
 * length, and it is filled in with the components and returned.
 * @param cspace a specified {@code ColorSpace}
 * @param compArray an array that this method fills with the
 * color and alpha components of this {@code Color} in
 * the specified {@code ColorSpace} and returns
 * @return the color and alpha components in a {@code float}
 * array.
 */
 public float[] getComponents(ColorSpace cspace, float[] compArray) {
 if (cs == null) {
 cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
 }
 float[] f;
 if (fvalue == null) {
 f = new float[3];
 f[0] = ((float)getRed())/255f;
 f[1] = ((float)getGreen())/255f;
 f[2] = ((float)getBlue())/255f;
 } else {
 f = fvalue;
 }
 float[] tmp = cs.toCIEXYZ(f);
 float[] tmpout = cspace.fromCIEXYZ(tmp);
 if (compArray == null) {
 compArray = new float[tmpout.length + 1];
 }
 for (int i = 0 ; i < tmpout.length ; i++) {
 compArray[i] = tmpout[i];
 }
 if (fvalue == null) {
 compArray[tmpout.length] = ((float)getAlpha())/255f;
 } else {
 compArray[tmpout.length] = falpha;
 }
 return compArray;
 }

 /**
 * Returns a {@code float} array containing only the color
 * components of the {@code Color} in the
 * {@code ColorSpace} specified by the {@code cspace}
 * parameter. If {@code compArray} is {@code null}, an array
 * with length equal to the number of components in
 * {@code cspace} is created for the return value. Otherwise,
 * {@code compArray} must have at least this length, and it is
 * filled in with the components and returned.
 * @param cspace a specified {@code ColorSpace}
 * @param compArray an array that this method fills with the color
 * components of this {@code Color} in the specified
 * {@code ColorSpace}
 * @return the color components in a {@code float} array.
 */
 public float[] getColorComponents(ColorSpace cspace, float[] compArray) {
 if (cs == null) {
 cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
 }
 float[] f;
 if (fvalue == null) {
 f = new float[3];
 f[0] = ((float)getRed())/255f;
 f[1] = ((float)getGreen())/255f;
 f[2] = ((float)getBlue())/255f;
 } else {
 f = fvalue;
 }
 float[] tmp = cs.toCIEXYZ(f);
 float[] tmpout = cspace.fromCIEXYZ(tmp);
 if (compArray == null) {
 return tmpout;
 }
 for (int i = 0 ; i < tmpout.length ; i++) {
 compArray[i] = tmpout[i];
 }
 return compArray;
 }

 /**
 * Returns the {@code ColorSpace} of this {@code Color}.
 * @return this {@code Color} object's {@code ColorSpace}.
 */
 public ColorSpace getColorSpace() {
 if (cs == null) {
 cs = ColorSpace.getInstance(ColorSpace.CS_sRGB);
 }
 return cs;
 }

 /**
 * Creates and returns a {@link PaintContext} used to
 * generate a solid color field pattern.
 * See the {@link Paint#createContext specification} of the
 * method in the {@link Paint} interface for information
 * on null parameter handling.
 *
 * @param cm the preferred {@link ColorModel} which represents the most convenient
 * format for the caller to receive the pixel data, or {@code null}
 * if there is no preference.
 * @param r the device space bounding box
 * of the graphics primitive being rendered.
 * @param r2d the user space bounding box
 * of the graphics primitive being rendered.
 * @param xform the {@link AffineTransform} from user
 * space into device space.
 * @param hints the set of hints that the context object can use to
 * choose between rendering alternatives.
 * @return the {@code PaintContext} for
 * generating color patterns.
 * @see Paint
 * @see PaintContext
 * @see ColorModel
 * @see Rectangle
 * @see Rectangle2D
 * @see AffineTransform
 * @see RenderingHints
 */
 public synchronized PaintContext createContext(ColorModel cm, Rectangle r,
 Rectangle2D r2d,
 AffineTransform xform,
 RenderingHints hints) {
 return new ColorPaintContext(getRGB(), cm);
 }

 /**
 * Returns the transparency mode for this {@code Color}. This is
 * required to implement the {@code Paint} interface.
 * @return this {@code Color} object's transparency mode.
 * @see Paint
 * @see Transparency
 * @see #createContext
 */
 public int getTransparency() {
 int alpha = getAlpha();
 if (alpha == 0xff) {
 return Transparency.OPAQUE;
 }
 else if (alpha == 0) {
 return Transparency.BITMASK;
 }
 else {
 return Transparency.TRANSLUCENT;
 }
 }

}

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