Source for java.awt.color.ColorSpace

   1: /* ColorSpace.java -- transforms between color spaces
   2:    Copyright (C) 2000, 2002 Free Software Foundation
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: 
  39: package java.awt.color;
  40: 
  41: import java.io.Serializable;
  42: 
  43: /**
  44:  * NEEDS DOCUMENTATION
  45:  *
  46:  * @author Rolf W. Rasmussen (rolfwr@ii.uib.no)
  47:  * @since 1.2
  48:  */
  49: public abstract class ColorSpace implements Serializable
  50: {
  51:   /**
  52:    * Compatible with JDK 1.2+.
  53:    */
  54:   private static final long serialVersionUID = -409452704308689724L;
  55: 
  56:   public static final int TYPE_XYZ = 0;
  57:   public static final int TYPE_Lab = 1;
  58:   public static final int TYPE_Luv = 2;
  59:   public static final int TYPE_YCbCr = 3;
  60:   public static final int TYPE_Yxy = 4;
  61:   public static final int TYPE_RGB = 5;
  62:   public static final int TYPE_GRAY = 6;
  63:   public static final int TYPE_HSV = 7;
  64:   public static final int TYPE_HLS = 8;
  65:   public static final int TYPE_CMYK = 9;
  66:   // mysterious gap in the enumeration sequenece
  67:   public static final int TYPE_CMY = 11;
  68:   public static final int TYPE_2CLR = 12;
  69:   public static final int TYPE_3CLR = 13;
  70:   public static final int TYPE_4CLR = 14;
  71:   public static final int TYPE_5CLR = 15;
  72:   public static final int TYPE_6CLR = 16;
  73:   public static final int TYPE_7CLR = 17;
  74:   public static final int TYPE_8CLR = 18;
  75:   public static final int TYPE_9CLR = 19;
  76:   public static final int TYPE_ACLR = 20;
  77:   public static final int TYPE_BCLR = 21;
  78:   public static final int TYPE_CCLR = 22;
  79:   public static final int TYPE_DCLR = 23;
  80:   public static final int TYPE_ECLR = 24;
  81:   public static final int TYPE_FCLR = 25;
  82: 
  83:   public static final int CS_sRGB = 1000;
  84:   public static final int CS_LINEAR_RGB = 1004;
  85:   public static final int CS_CIEXYZ = 1001;
  86:   public static final int CS_PYCC = 1002;
  87:   public static final int CS_GRAY = 1003;
  88: 
  89:   private static final int CS_BASE = CS_sRGB;
  90:   private static final int CS_END = CS_LINEAR_RGB + 1;
  91:   private static final int CS_COUNT = CS_END - CS_BASE;
  92: 
  93:   // Instances are lazily instantiated
  94:   private static final ColorSpace[] INSTANCES = new ColorSpace[CS_COUNT];
  95: 
  96:   /**
  97:    * @serial
  98:    */
  99:   // 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