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| 1 | /* | ||
| 2 | * Copyright (c) 1997, 2008, 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 java.awt; | ||
| 27 | |||
| 28 | import java.awt.geom.Rectangle2D; | ||
| 29 | import java.awt.geom.AffineTransform; | ||
| 30 | import java.awt.image.BufferedImage; | ||
| 31 | import java.awt.image.ColorModel; | ||
| 32 | |||
| 33 | /** | ||
| 34 | * The <code>TexturePaint</code> class provides a way to fill a | ||
| 35 | * {@link Shape} with a texture that is specified as | ||
| 36 | * a {@link BufferedImage}. The size of the <code>BufferedImage</code> | ||
| 37 | * object should be small because the <code>BufferedImage</code> data | ||
| 38 | * is copied by the <code>TexturePaint</code> object. | ||
| 39 | * At construction time, the texture is anchored to the upper | ||
| 40 | * left corner of a {@link Rectangle2D} that is | ||
| 41 | * specified in user space. Texture is computed for | ||
| 42 | * locations in the device space by conceptually replicating the | ||
| 43 | * specified <code>Rectangle2D</code> infinitely in all directions | ||
| 44 | * in user space and mapping the <code>BufferedImage</code> to each | ||
| 45 | * replicated <code>Rectangle2D</code>. | ||
| 46 | * @see Paint | ||
| 47 | * @see Graphics2D#setPaint | ||
| 48 | * @version 1.48, 06/05/07 | ||
| 49 | */ | ||
| 50 | |||
| 51 | public class TexturePaint implements Paint { | ||
| 52 | |||
| 53 | BufferedImage bufImg; | ||
| 54 | double tx; | ||
| 55 | double ty; | ||
| 56 | double sx; | ||
| 57 | double sy; | ||
| 58 | |||
| 59 | /** | ||
| 60 | * Constructs a <code>TexturePaint</code> object. | ||
| 61 | * @param txtr the <code>BufferedImage</code> object with the texture | ||
| 62 | * used for painting | ||
| 63 | * @param anchor the <code>Rectangle2D</code> in user space used to | ||
| 64 | * anchor and replicate the texture | ||
| 65 | */ | ||
| 66 | public TexturePaint(BufferedImage txtr, | ||
| 67 | Rectangle2D anchor) { | ||
| 68 | this.bufImg = txtr; | ||
| 69 | this.tx = anchor.getX(); | ||
| 70 | this.ty = anchor.getY(); | ||
| 71 | this.sx = anchor.getWidth() / bufImg.getWidth(); | ||
| 72 | this.sy = anchor.getHeight() / bufImg.getHeight(); | ||
| 73 | } | ||
| 74 | |||
| 75 | /** | ||
| 76 | * Returns the <code>BufferedImage</code> texture used to | ||
| 77 | * fill the shapes. | ||
| 78 | * @return a <code>BufferedImage</code>. | ||
| 79 | */ | ||
| 80 | public BufferedImage getImage() { | ||
| 81 | return bufImg; | ||
| 82 | } | ||
| 83 | |||
| 84 | /** | ||
| 85 | * Returns a copy of the anchor rectangle which positions and | ||
| 86 | * sizes the textured image. | ||
| 87 | * @return the <code>Rectangle2D</code> used to anchor and | ||
| 88 | * size this <code>TexturePaint</code>. | ||
| 89 | */ | ||
| 90 | public Rectangle2D getAnchorRect() { | ||
| 91 | return new Rectangle2D.Double(tx, ty, | ||
| 92 | sx * bufImg.getWidth(), | ||
| 93 | sy * bufImg.getHeight()); | ||
| 94 | } | ||
| 95 | |||
| 96 | /** | ||
| 97 | * Creates and returns a {@link PaintContext} used to | ||
| 98 | * generate a tiled image pattern. | ||
| 99 | * See the {@link Paint#createContext specification} of the | ||
| 100 | * method in the {@link Paint} interface for information | ||
| 101 | * on null parameter handling. | ||
| 102 | * | ||
| 103 | * @param cm the preferred {@link ColorModel} which represents the most convenient | ||
| 104 | * format for the caller to receive the pixel data, or {@code null} | ||
| 105 | * if there is no preference. | ||
| 106 | * @param deviceBounds the device space bounding box | ||
| 107 | * of the graphics primitive being rendered. | ||
| 108 | * @param userBounds the user space bounding box | ||
| 109 | * of the graphics primitive being rendered. | ||
| 110 | * @param xform the {@link AffineTransform} from user | ||
| 111 | * space into device space. | ||
| 112 | * @param hints the set of hints that the context object can use to | ||
| 113 | * choose between rendering alternatives. | ||
| 114 | * @return the {@code PaintContext} for | ||
| 115 | * generating color patterns. | ||
| 116 | * @see Paint | ||
| 117 | * @see PaintContext | ||
| 118 | * @see ColorModel | ||
| 119 | * @see Rectangle | ||
| 120 | * @see Rectangle2D | ||
| 121 | * @see AffineTransform | ||
| 122 | * @see RenderingHints | ||
| 123 | */ | ||
| 124 | public PaintContext createContext(ColorModel cm, | ||
| 125 | Rectangle deviceBounds, | ||
| 126 | Rectangle2D userBounds, | ||
| 127 | AffineTransform xform, | ||
| 128 | RenderingHints hints) { | ||
| 129 | if (xform == null) { | ||
| 130 | xform = new AffineTransform(); | ||
| 131 | } else { | ||
| 132 | xform = (AffineTransform) xform.clone(); | ||
| 133 | } | ||
| 134 | xform.translate(tx, ty); | ||
| 135 | xform.scale(sx, sy); | ||
| 136 | |||
| 137 | return TexturePaintContext.getContext(bufImg, xform, hints, | ||
| 138 | deviceBounds); | ||
| 139 | } | ||
| 140 | |||
| 141 | /** | ||
| 142 | * Returns the transparency mode for this <code>TexturePaint</code>. | ||
| 143 | * @return the transparency mode for this <code>TexturePaint</code> | ||
| 144 | * as an integer value. | ||
| 145 | * @see Transparency | ||
| 146 | */ | ||
| 147 | public int getTransparency() { | ||
| 148 | return (bufImg.getColorModel()).getTransparency(); | ||
| 149 | } | ||
| 150 | |||
| 151 | } | ||