001 /* ColorSpace.java -- transforms between color spaces
002 Copyright (C) 2000, 2002 Free Software Foundation
003
004 This file is part of GNU Classpath.
005
006 GNU Classpath is free software; you can redistribute it and/or modify
007 it under the terms of the GNU General Public License as published by
008 the Free Software Foundation; either version 2, or (at your option)
009 any later version.
010
011 GNU Classpath is distributed in the hope that it will be useful, but
012 WITHOUT ANY WARRANTY; without even the implied warranty of
013 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
014 General Public License for more details.
015
016 You should have received a copy of the GNU General Public License
017 along with GNU Classpath; see the file COPYING. If not, write to the
018 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019 02110-1301 USA.
020
021 Linking this library statically or dynamically with other modules is
022 making a combined work based on this library. Thus, the terms and
023 conditions of the GNU General Public License cover the whole
024 combination.
025
026 As a special exception, the copyright holders of this library give you
027 permission to link this library with independent modules to produce an
028 executable, regardless of the license terms of these independent
029 modules, and to copy and distribute the resulting executable under
030 terms of your choice, provided that you also meet, for each linked
031 independent module, the terms and conditions of the license of that
032 module. An independent module is a module which is not derived from
033 or based on this library. If you modify this library, you may extend
034 this exception to your version of the library, but you are not
035 obligated to do so. If you do not wish to do so, delete this
036 exception statement from your version. */
037
038
039 package java.awt.color;
040
041 import java.io.Serializable;
042
043 /**
044 * NEEDS DOCUMENTATION
045 *
046 * @author Rolf W. Rasmussen (rolfwr@ii.uib.no)
047 * @since 1.2
048 */
049 public abstract class ColorSpace implements Serializable
050 {
051 /**
052 * Compatible with JDK 1.2+.
053 */
054 private static final long serialVersionUID = -409452704308689724L;
055
056 public static final int TYPE_XYZ = 0;
057 public static final int TYPE_Lab = 1;
058 public static final int TYPE_Luv = 2;
059 public static final int TYPE_YCbCr = 3;
060 public static final int TYPE_Yxy = 4;
061 public static final int TYPE_RGB = 5;
062 public static final int TYPE_GRAY = 6;
063 public static final int TYPE_HSV = 7;
064 public static final int TYPE_HLS = 8;
065 public static final int TYPE_CMYK = 9;
066 // mysterious gap in the enumeration sequenece
067 public static final int TYPE_CMY = 11;
068 public static final int TYPE_2CLR = 12;
069 public static final int TYPE_3CLR = 13;
070 public static final int TYPE_4CLR = 14;
071 public static final int TYPE_5CLR = 15;
072 public static final int TYPE_6CLR = 16;
073 public static final int TYPE_7CLR = 17;
074 public static final int TYPE_8CLR = 18;
075 public static final int TYPE_9CLR = 19;
076 public static final int TYPE_ACLR = 20;
077 public static final int TYPE_BCLR = 21;
078 public static final int TYPE_CCLR = 22;
079 public static final int TYPE_DCLR = 23;
080 public static final int TYPE_ECLR = 24;
081 public static final int TYPE_FCLR = 25;
082
083 public static final int CS_sRGB = 1000;
084 public static final int CS_LINEAR_RGB = 1004;
085 public static final int CS_CIEXYZ = 1001;
086 public static final int CS_PYCC = 1002;
087 public static final int CS_GRAY = 1003;
088
089 private static final int CS_BASE = CS_sRGB;
090 private static final int CS_END = CS_LINEAR_RGB + 1;
091 private static final int CS_COUNT = CS_END - CS_BASE;
092
093 // Instances are lazily instantiated
094 private static final ColorSpace[] INSTANCES = new ColorSpace[CS_COUNT];
095
096 /**
097 * @serial
098 */
099 // Visible in subclass.
100 final int type;
101
102 /**
103 * @serial
104 */
105 // Visible in subclass.
106 final int numComponents;
107
108 protected ColorSpace(int type, int numcomponents)
109 {
110 this.type = type;
111 numComponents = numcomponents;
112 }
113
114 public static ColorSpace getInstance(int colorspace)
115 {
116 if ((colorspace >= CS_BASE) && (colorspace < CS_END))
117 {
118 int instanceIndex = colorspace - CS_BASE;
119 if (INSTANCES[instanceIndex] == null)
120 {
121 ICC_Profile profile = new ICC_Profile(colorspace);
122 INSTANCES[instanceIndex] = new ICC_ColorSpace(profile);
123 }
124 return INSTANCES[instanceIndex];
125 }
126 throw new IllegalArgumentException("unknown/unsupported colorspace");
127 }
128
129 public boolean isCS_sRGB()
130 {
131 return type == CS_sRGB;
132 }
133
134 /**
135 * Transforms a color value assumed to be in this ColorSpace into a value in
136 * the default CS_sRGB color space.
137 *
138 * @exception ArrayIndexOutOfBoundsException If array length is not at least
139 * the number of components in this ColorSpace.
140 */
141 public abstract float[] toRGB(float[] colorvalue);
142
143 public abstract float[] fromRGB(float[] rgbvalue);
144
145 public abstract float[] toCIEXYZ(float[] colorvalue);
146
147 public abstract float[] fromCIEXYZ(float[] colorvalue);
148
149 public int getType()
150 {
151 return type;
152 }
153
154 public int getNumComponents()
155 {
156 return numComponents;
157 }
158
159 public String getName(int idx)
160 {
161 return "type " + type;
162 }
163
164 /**
165 * @since 1.4
166 */
167 public float getMinValue(int idx)
168 {
169 if (idx < 0 || idx >= numComponents)
170 throw new IllegalArgumentException();
171 return 0;
172 }
173
174 /**
175 * @since 1.4
176 */
177 public float getMaxValue(int idx)
178 {
179 if (idx < 0 || idx >= numComponents)
180 throw new IllegalArgumentException();
181 return 1;
182 }
183 } // class ColorSpace