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| 1 | /* | ||
| 2 | * Copyright (c) 1998, 2006, 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 | /* | ||
| 27 | * (C) Copyright Taligent, Inc. 1996 - 1997, All Rights Reserved | ||
| 28 | * (C) Copyright IBM Corp. 1996 - 1998, All Rights Reserved | ||
| 29 | * | ||
| 30 | * The original version of this source code and documentation is | ||
| 31 | * copyrighted and owned by Taligent, Inc., a wholly-owned subsidiary | ||
| 32 | * of IBM. These materials are provided under terms of a License | ||
| 33 | * Agreement between Taligent and Sun. This technology is protected | ||
| 34 | * by multiple US and International patents. | ||
| 35 | * | ||
| 36 | * This notice and attribution to Taligent may not be removed. | ||
| 37 | * Taligent is a registered trademark of Taligent, Inc. | ||
| 38 | * | ||
| 39 | */ | ||
| 40 | |||
| 41 | package java.awt.font; | ||
| 42 | |||
| 43 | import java.awt.Image; | ||
| 44 | import java.awt.Graphics2D; | ||
| 45 | import java.awt.geom.Rectangle2D; | ||
| 46 | |||
| 47 | /** | ||
| 48 | * The <code>ImageGraphicAttribute</code> class is an implementation of | ||
| 49 | * {@link GraphicAttribute} which draws images in | ||
| 50 | * a {@link TextLayout}. | ||
| 51 | * @see GraphicAttribute | ||
| 52 | */ | ||
| 53 | |||
| 54 | public final class ImageGraphicAttribute extends GraphicAttribute { | ||
| 55 | |||
| 56 | private Image fImage; | ||
| 57 | private float fImageWidth, fImageHeight; | ||
| 58 | private float fOriginX, fOriginY; | ||
| 59 | |||
| 60 | /** | ||
| 61 | * Constucts an <code>ImageGraphicAttribute</code> from the specified | ||
| 62 | * {@link Image}. The origin is at (0, 0). | ||
| 63 | * @param image the <code>Image</code> rendered by this | ||
| 64 | * <code>ImageGraphicAttribute</code>. | ||
| 65 | * This object keeps a reference to <code>image</code>. | ||
| 66 | * @param alignment one of the alignments from this | ||
| 67 | * <code>ImageGraphicAttribute</code> | ||
| 68 | */ | ||
| 69 | public ImageGraphicAttribute(Image image, int alignment) { | ||
| 70 | |||
| 71 | this(image, alignment, 0, 0); | ||
| 72 | } | ||
| 73 | |||
| 74 | /** | ||
| 75 | * Constructs an <code>ImageGraphicAttribute</code> from the specified | ||
| 76 | * <code>Image</code>. The point | ||
| 77 | * (<code>originX</code>, <code>originY</code>) in the | ||
| 78 | * <code>Image</code> appears at the origin of the | ||
| 79 | * <code>ImageGraphicAttribute</code> within the text. | ||
| 80 | * @param image the <code>Image</code> rendered by this | ||
| 81 | * <code>ImageGraphicAttribute</code>. | ||
| 82 | * This object keeps a reference to <code>image</code>. | ||
| 83 | * @param alignment one of the alignments from this | ||
| 84 | * <code>ImageGraphicAttribute</code> | ||
| 85 | * @param originX the X coordinate of the point within | ||
| 86 | * the <code>Image</code> that appears at the origin of the | ||
| 87 | * <code>ImageGraphicAttribute</code> in the text line. | ||
| 88 | * @param originY the Y coordinate of the point within | ||
| 89 | * the <code>Image</code> that appears at the origin of the | ||
| 90 | * <code>ImageGraphicAttribute</code> in the text line. | ||
| 91 | */ | ||
| 92 | public ImageGraphicAttribute(Image image, | ||
| 93 | int alignment, | ||
| 94 | float originX, | ||
| 95 | float originY) { | ||
| 96 | |||
| 97 | super(alignment); | ||
| 98 | |||
| 99 | // Can't clone image | ||
| 100 | // fImage = (Image) image.clone(); | ||
| 101 | fImage = image; | ||
| 102 | |||
| 103 | fImageWidth = image.getWidth(null); | ||
| 104 | fImageHeight = image.getHeight(null); | ||
| 105 | |||
| 106 | // ensure origin is in Image? | ||
| 107 | fOriginX = originX; | ||
| 108 | fOriginY = originY; | ||
| 109 | } | ||
| 110 | |||
| 111 | /** | ||
| 112 | * Returns the ascent of this <code>ImageGraphicAttribute</code>. The | ||
| 113 | * ascent of an <code>ImageGraphicAttribute</code> is the distance | ||
| 114 | * from the top of the image to the origin. | ||
| 115 | * @return the ascent of this <code>ImageGraphicAttribute</code>. | ||
| 116 | */ | ||
| 117 | public float getAscent() { | ||
| 118 | |||
| 119 | return Math.max(0, fOriginY); | ||
| 120 | } | ||
| 121 | |||
| 122 | /** | ||
| 123 | * Returns the descent of this <code>ImageGraphicAttribute</code>. | ||
| 124 | * The descent of an <code>ImageGraphicAttribute</code> is the | ||
| 125 | * distance from the origin to the bottom of the image. | ||
| 126 | * @return the descent of this <code>ImageGraphicAttribute</code>. | ||
| 127 | */ | ||
| 128 | public float getDescent() { | ||
| 129 | |||
| 130 | return Math.max(0, fImageHeight-fOriginY); | ||
| 131 | } | ||
| 132 | |||
| 133 | /** | ||
| 134 | * Returns the advance of this <code>ImageGraphicAttribute</code>. | ||
| 135 | * The advance of an <code>ImageGraphicAttribute</code> is the | ||
| 136 | * distance from the origin to the right edge of the image. | ||
| 137 | * @return the advance of this <code>ImageGraphicAttribute</code>. | ||
| 138 | */ | ||
| 139 | public float getAdvance() { | ||
| 140 | |||
| 141 | return Math.max(0, fImageWidth-fOriginX); | ||
| 142 | } | ||
| 143 | |||
| 144 | /** | ||
| 145 | * Returns a {@link Rectangle2D} that encloses all of the | ||
| 146 | * bits rendered by this <code>ImageGraphicAttribute</code>, relative | ||
| 147 | * to the rendering position. A graphic can be rendered beyond its | ||
| 148 | * origin, ascent, descent, or advance; but if it is, this | ||
| 149 | * method's implementation must indicate where the graphic is rendered. | ||
| 150 | * @return a <code>Rectangle2D</code> that encloses all of the bits | ||
| 151 | * rendered by this <code>ImageGraphicAttribute</code>. | ||
| 152 | */ | ||
| 153 | public Rectangle2D getBounds() { | ||
| 154 | |||
| 155 | return new Rectangle2D.Float( | ||
| 156 | -fOriginX, -fOriginY, fImageWidth, fImageHeight); | ||
| 157 | } | ||
| 158 | |||
| 159 | /** | ||
| 160 | * {@inheritDoc} | ||
| 161 | */ | ||
| 162 | public void draw(Graphics2D graphics, float x, float y) { | ||
| 163 | |||
| 164 | graphics.drawImage(fImage, (int) (x-fOriginX), (int) (y-fOriginY), null); | ||
| 165 | } | ||
| 166 | |||
| 167 | /** | ||
| 168 | * Returns a hashcode for this <code>ImageGraphicAttribute</code>. | ||
| 169 | * @return a hash code value for this object. | ||
| 170 | */ | ||
| 171 | public int hashCode() { | ||
| 172 | |||
| 173 | return fImage.hashCode(); | ||
| 174 | } | ||
| 175 | |||
| 176 | /** | ||
| 177 | * Compares this <code>ImageGraphicAttribute</code> to the specified | ||
| 178 | * {@link Object}. | ||
| 179 | * @param rhs the <code>Object</code> to compare for equality | ||
| 180 | * @return <code>true</code> if this | ||
| 181 | * <code>ImageGraphicAttribute</code> equals <code>rhs</code>; | ||
| 182 | * <code>false</code> otherwise. | ||
| 183 | */ | ||
| 184 | public boolean equals(Object rhs) { | ||
| 185 | |||
| 186 | try { | ||
| 187 | return equals((ImageGraphicAttribute) rhs); | ||
| 188 | } | ||
| 189 | catch(ClassCastException e) { | ||
| 190 | return false; | ||
| 191 | } | ||
| 192 | } | ||
| 193 | |||
| 194 | /** | ||
| 195 | * Compares this <code>ImageGraphicAttribute</code> to the specified | ||
| 196 | * <code>ImageGraphicAttribute</code>. | ||
| 197 | * @param rhs the <code>ImageGraphicAttribute</code> to compare for | ||
| 198 | * equality | ||
| 199 | * @return <code>true</code> if this | ||
| 200 | * <code>ImageGraphicAttribute</code> equals <code>rhs</code>; | ||
| 201 | * <code>false</code> otherwise. | ||
| 202 | */ | ||
| 203 | public boolean equals(ImageGraphicAttribute rhs) { | ||
| 204 | |||
| 205 | if (rhs == null) { | ||
| 206 | return false; | ||
| 207 | } | ||
| 208 | |||
| 209 | if (this == rhs) { | ||
| 210 | return true; | ||
| 211 | } | ||
| 212 | |||
| 213 | if (fOriginX != rhs.fOriginX || fOriginY != rhs.fOriginY) { | ||
| 214 | return false; | ||
| 215 | } | ||
| 216 | |||
| 217 | if (getAlignment() != rhs.getAlignment()) { | ||
| 218 | return false; | ||
| 219 | } | ||
| 220 | |||
| 221 | if (!fImage.equals(rhs.fImage)) { | ||
| 222 | return false; | ||
| 223 | } | ||
| 224 | |||
| 225 | return true; | ||
| 226 | } | ||
| 227 | } | ||