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| 1 | +/* | |
| 2 | + * Copyright (c) 2003, Oracle and/or its affiliates. All rights reserved. | |
| 3 | + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 | + * | |
| 5 | + * This code is free software; you can redistribute it and/or modify it | |
| 6 | + * under the terms of the GNU General Public License version 2 only, as | |
| 7 | + * published by the Free Software Foundation. Oracle designates this | |
| 8 | + * particular file as subject to the "Classpath" exception as provided | |
| 9 | + * by Oracle in the LICENSE file that accompanied this code. | |
| 10 | + * | |
| 11 | + * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 12 | + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 | + * version 2 for more details (a copy is included in the LICENSE file that | |
| 15 | + * accompanied this code). | |
| 16 | + * | |
| 17 | + * You should have received a copy of the GNU General Public License version | |
| 18 | + * 2 along with this work; if not, write to the Free Software Foundation, | |
| 19 | + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 20 | + * | |
| 21 | + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA | |
| 22 | + * or visit www.oracle.com if you need additional information or have any | |
| 23 | + * questions. | |
| 24 | + */ | |
| 25 | + | |
| 26 | +package com.sun.imageio.plugins.common; | |
| 27 | + | |
| 28 | +import java.awt.color.ColorSpace; | |
| 29 | + | |
| 30 | +/** | |
| 31 | + * A dummy <code>ColorSpace</code> to enable <code>ColorModel</code> | |
| 32 | + * for image data which do not have an innate color representation. | |
| 33 | + */ | |
| 34 | +public class BogusColorSpace extends ColorSpace { | |
| 35 | + /** | |
| 36 | + * Return the type given the number of components. | |
| 37 | + * | |
| 38 | + * @param numComponents The number of components in the | |
| 39 | + * <code>ColorSpace</code>. | |
| 40 | + * @exception IllegalArgumentException if <code>numComponents</code> | |
| 41 | + * is less than 1. | |
| 42 | + */ | |
| 43 | + private static int getType(int numComponents) { | |
| 44 | + if(numComponents < 1) { | |
| 45 | + throw new IllegalArgumentException("numComponents < 1!"); | |
| 46 | + } | |
| 47 | + | |
| 48 | + int type; | |
| 49 | + switch(numComponents) { | |
| 50 | + case 1: | |
| 51 | + type = ColorSpace.TYPE_GRAY; | |
| 52 | + break; | |
| 53 | + default: | |
| 54 | + // Based on the constant definitions TYPE_2CLR=12 through | |
| 55 | + // TYPE_FCLR=25. This will return unknown types for | |
| 56 | + // numComponents > 15. | |
| 57 | + type = numComponents + 10; | |
| 58 | + } | |
| 59 | + | |
| 60 | + return type; | |
| 61 | + } | |
| 62 | + | |
| 63 | + /** | |
| 64 | + * Constructs a bogus <code>ColorSpace</code>. | |
| 65 | + * | |
| 66 | + * @param numComponents The number of components in the | |
| 67 | + * <code>ColorSpace</code>. | |
| 68 | + * @exception IllegalArgumentException if <code>numComponents</code> | |
| 69 | + * is less than 1. | |
| 70 | + */ | |
| 71 | + public BogusColorSpace(int numComponents) { | |
| 72 | + super(getType(numComponents), numComponents); | |
| 73 | + } | |
| 74 | + | |
| 75 | + // | |
| 76 | + // The following methods simply copy the input array to the | |
| 77 | + // output array while otherwise attempting to adhere to the | |
| 78 | + // specified behavior of the methods vis-a-vis exceptions. | |
| 79 | + // | |
| 80 | + | |
| 81 | + public float[] toRGB(float[] colorvalue) { | |
| 82 | + if(colorvalue.length < getNumComponents()) { | |
| 83 | + throw new ArrayIndexOutOfBoundsException | |
| 84 | + ("colorvalue.length < getNumComponents()"); | |
| 85 | + } | |
| 86 | + | |
| 87 | + float[] rgbvalue = new float[3]; | |
| 88 | + | |
| 89 | + System.arraycopy(colorvalue, 0, rgbvalue, 0, | |
| 90 | + Math.min(3, getNumComponents())); | |
| 91 | + | |
| 92 | + return colorvalue; | |
| 93 | + } | |
| 94 | + | |
| 95 | + public float[] fromRGB(float[] rgbvalue) { | |
| 96 | + if(rgbvalue.length < 3) { | |
| 97 | + throw new ArrayIndexOutOfBoundsException | |
| 98 | + ("rgbvalue.length < 3"); | |
| 99 | + } | |
| 100 | + | |
| 101 | + float[] colorvalue = new float[getNumComponents()]; | |
| 102 | + | |
| 103 | + System.arraycopy(rgbvalue, 0, colorvalue, 0, | |
| 104 | + Math.min(3, colorvalue.length)); | |
| 105 | + | |
| 106 | + return rgbvalue; | |
| 107 | + } | |
| 108 | + | |
| 109 | + public float[] toCIEXYZ(float[] colorvalue) { | |
| 110 | + if(colorvalue.length < getNumComponents()) { | |
| 111 | + throw new ArrayIndexOutOfBoundsException | |
| 112 | + ("colorvalue.length < getNumComponents()"); | |
| 113 | + } | |
| 114 | + | |
| 115 | + float[] xyzvalue = new float[3]; | |
| 116 | + | |
| 117 | + System.arraycopy(colorvalue, 0, xyzvalue, 0, | |
| 118 | + Math.min(3, getNumComponents())); | |
| 119 | + | |
| 120 | + return colorvalue; | |
| 121 | + } | |
| 122 | + | |
| 123 | + public float[] fromCIEXYZ(float[] xyzvalue) { | |
| 124 | + if(xyzvalue.length < 3) { | |
| 125 | + throw new ArrayIndexOutOfBoundsException | |
| 126 | + ("xyzvalue.length < 3"); | |
| 127 | + } | |
| 128 | + | |
| 129 | + float[] colorvalue = new float[getNumComponents()]; | |
| 130 | + | |
| 131 | + System.arraycopy(xyzvalue, 0, colorvalue, 0, | |
| 132 | + Math.min(3, colorvalue.length)); | |
| 133 | + | |
| 134 | + return xyzvalue; | |
| 135 | + } | |
| 136 | +} | |