001: /*
002: * $RCSfile: BogusColorSpace.java,v $
003: *
004: *
005: * Copyright (c) 2005 Sun Microsystems, Inc. All Rights Reserved.
006: *
007: * Redistribution and use in source and binary forms, with or without
008: * modification, are permitted provided that the following conditions
009: * are met:
010: *
011: * - Redistribution of source code must retain the above copyright
012: * notice, this list of conditions and the following disclaimer.
013: *
014: * - Redistribution in binary form must reproduce the above copyright
015: * notice, this list of conditions and the following disclaimer in
016: * the documentation and/or other materials provided with the
017: * distribution.
018: *
019: * Neither the name of Sun Microsystems, Inc. or the names of
020: * contributors may be used to endorse or promote products derived
021: * from this software without specific prior written permission.
022: *
023: * This software is provided "AS IS," without a warranty of any
024: * kind. ALL EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND
025: * WARRANTIES, INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY,
026: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY
027: * EXCLUDED. SUN MIDROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL
028: * NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF
029: * USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
030: * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR
031: * ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL,
032: * CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND
033: * REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF OR
034: * INABILITY TO USE THIS SOFTWARE, EVEN IF SUN HAS BEEN ADVISED OF THE
035: * POSSIBILITY OF SUCH DAMAGES.
036: *
037: * You acknowledge that this software is not designed or intended for
038: * use in the design, construction, operation or maintenance of any
039: * nuclear facility.
040: *
041: * $Revision: 1.1 $
042: * $Date: 2005/02/11 05:01:22 $
043: * $State: Exp $
044: */
045: package com.sun.media.imageioimpl.common;
046:
047: import java.awt.color.ColorSpace;
048:
049: /**
050: * A dummy <code>ColorSpace</code> to enable <code>ColorModel</code>
051: * for image data which do not have an innate color representation.
052: */
053: public class BogusColorSpace extends ColorSpace {
054: /**
055: * Return the type given the number of components.
056: *
057: * @param numComponents The number of components in the
058: * <code>ColorSpace</code>.
059: * @exception IllegalArgumentException if <code>numComponents</code>
060: * is less than 1.
061: */
062: private static int getType(int numComponents) {
063: if (numComponents < 1) {
064: throw new IllegalArgumentException("numComponents < 1!");
065: }
066:
067: int type;
068: switch (numComponents) {
069: case 1:
070: type = ColorSpace.TYPE_GRAY;
071: break;
072: default:
073: // Based on the constant definitions TYPE_2CLR=12 through
074: // TYPE_FCLR=25. This will return unknown types for
075: // numComponents > 15.
076: type = numComponents + 10;
077: }
078:
079: return type;
080: }
081:
082: /**
083: * Constructs a bogus <code>ColorSpace</code>.
084: *
085: * @param numComponents The number of components in the
086: * <code>ColorSpace</code>.
087: * @exception IllegalArgumentException if <code>numComponents</code>
088: * is less than 1.
089: */
090: public BogusColorSpace(int numComponents) {
091: super (getType(numComponents), numComponents);
092: }
093:
094: //
095: // The following methods simply copy the input array to the
096: // output array while otherwise attempting to adhere to the
097: // specified behavior of the methods vis-a-vis exceptions.
098: //
099:
100: public float[] toRGB(float[] colorvalue) {
101: if (colorvalue.length < getNumComponents()) {
102: throw new ArrayIndexOutOfBoundsException(
103: "colorvalue.length < getNumComponents()");
104: }
105:
106: float[] rgbvalue = new float[3];
107:
108: System.arraycopy(colorvalue, 0, rgbvalue, 0, Math.min(3,
109: getNumComponents()));
110:
111: return colorvalue;
112: }
113:
114: public float[] fromRGB(float[] rgbvalue) {
115: if (rgbvalue.length < 3) {
116: throw new ArrayIndexOutOfBoundsException(
117: "rgbvalue.length < 3");
118: }
119:
120: float[] colorvalue = new float[getNumComponents()];
121:
122: System.arraycopy(rgbvalue, 0, colorvalue, 0, Math.min(3,
123: colorvalue.length));
124:
125: return rgbvalue;
126: }
127:
128: public float[] toCIEXYZ(float[] colorvalue) {
129: if (colorvalue.length < getNumComponents()) {
130: throw new ArrayIndexOutOfBoundsException(
131: "colorvalue.length < getNumComponents()");
132: }
133:
134: float[] xyzvalue = new float[3];
135:
136: System.arraycopy(colorvalue, 0, xyzvalue, 0, Math.min(3,
137: getNumComponents()));
138:
139: return colorvalue;
140: }
141:
142: public float[] fromCIEXYZ(float[] xyzvalue) {
143: if (xyzvalue.length < 3) {
144: throw new ArrayIndexOutOfBoundsException(
145: "xyzvalue.length < 3");
146: }
147:
148: float[] colorvalue = new float[getNumComponents()];
149:
150: System.arraycopy(xyzvalue, 0, colorvalue, 0, Math.min(3,
151: colorvalue.length));
152:
153: return xyzvalue;
154: }
155: }
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