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| 1 | +/* | |
| 2 | + * Copyright (c) 1997, 2011, 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 sun.java2d.pipe; | |
| 27 | + | |
| 28 | +import java.awt.BasicStroke; | |
| 29 | +import java.awt.Rectangle; | |
| 30 | +import java.awt.Shape; | |
| 31 | +import java.awt.geom.Rectangle2D; | |
| 32 | +import java.awt.geom.PathIterator; | |
| 33 | +import sun.awt.SunHints; | |
| 34 | +import sun.java2d.SunGraphics2D; | |
| 35 | + | |
| 36 | +/** | |
| 37 | + * This class is used to convert raw geometry into 8-bit alpha tiles | |
| 38 | + * using an AATileGenerator for application by the next stage of | |
| 39 | + * the pipeline. | |
| 40 | + * This class sets up the Generator and computes the alpha tiles | |
| 41 | + * and then passes them on to a CompositePipe object for painting. | |
| 42 | + */ | |
| 43 | +public class AAShapePipe | |
| 44 | + implements ShapeDrawPipe, ParallelogramPipe | |
| 45 | +{ | |
| 46 | + static RenderingEngine renderengine = RenderingEngine.getInstance(); | |
| 47 | + | |
| 48 | + CompositePipe outpipe; | |
| 49 | + | |
| 50 | + public AAShapePipe(CompositePipe pipe) { | |
| 51 | + outpipe = pipe; | |
| 52 | + } | |
| 53 | + | |
| 54 | + public void draw(SunGraphics2D sg, Shape s) { | |
| 55 | + BasicStroke bs; | |
| 56 | + | |
| 57 | + if (sg.stroke instanceof BasicStroke) { | |
| 58 | + bs = (BasicStroke) sg.stroke; | |
| 59 | + } else { | |
| 60 | + s = sg.stroke.createStrokedShape(s); | |
| 61 | + bs = null; | |
| 62 | + } | |
| 63 | + | |
| 64 | + renderPath(sg, s, bs); | |
| 65 | + } | |
| 66 | + | |
| 67 | + public void fill(SunGraphics2D sg, Shape s) { | |
| 68 | + renderPath(sg, s, null); | |
| 69 | + } | |
| 70 | + | |
| 71 | + private static Rectangle2D computeBBox(double ux1, double uy1, | |
| 72 | + double ux2, double uy2) | |
| 73 | + { | |
| 74 | + if ((ux2 -= ux1) < 0) { | |
| 75 | + ux1 += ux2; | |
| 76 | + ux2 = -ux2; | |
| 77 | + } | |
| 78 | + if ((uy2 -= uy1) < 0) { | |
| 79 | + uy1 += uy2; | |
| 80 | + uy2 = -uy2; | |
| 81 | + } | |
| 82 | + return new Rectangle2D.Double(ux1, uy1, ux2, uy2); | |
| 83 | + } | |
| 84 | + | |
| 85 | + public void fillParallelogram(SunGraphics2D sg, | |
| 86 | + double ux1, double uy1, | |
| 87 | + double ux2, double uy2, | |
| 88 | + double x, double y, | |
| 89 | + double dx1, double dy1, | |
| 90 | + double dx2, double dy2) | |
| 91 | + { | |
| 92 | + Region clip = sg.getCompClip(); | |
| 93 | + int abox[] = new int[4]; | |
| 94 | + AATileGenerator aatg = | |
| 95 | + renderengine.getAATileGenerator(x, y, dx1, dy1, dx2, dy2, 0, 0, | |
| 96 | + clip, abox); | |
| 97 | + if (aatg == null) { | |
| 98 | + // Nothing to render | |
| 99 | + return; | |
| 100 | + } | |
| 101 | + | |
| 102 | + renderTiles(sg, computeBBox(ux1, uy1, ux2, uy2), aatg, abox); | |
| 103 | + } | |
| 104 | + | |
| 105 | + public void drawParallelogram(SunGraphics2D sg, | |
| 106 | + double ux1, double uy1, | |
| 107 | + double ux2, double uy2, | |
| 108 | + double x, double y, | |
| 109 | + double dx1, double dy1, | |
| 110 | + double dx2, double dy2, | |
| 111 | + double lw1, double lw2) | |
| 112 | + { | |
| 113 | + Region clip = sg.getCompClip(); | |
| 114 | + int abox[] = new int[4]; | |
| 115 | + AATileGenerator aatg = | |
| 116 | + renderengine.getAATileGenerator(x, y, dx1, dy1, dx2, dy2, lw1, lw2, | |
| 117 | + clip, abox); | |
| 118 | + if (aatg == null) { | |
| 119 | + // Nothing to render | |
| 120 | + return; | |
| 121 | + } | |
| 122 | + | |
| 123 | + // Note that bbox is of the original shape, not the wide path. | |
| 124 | + // This is appropriate for handing to Paint methods... | |
| 125 | + renderTiles(sg, computeBBox(ux1, uy1, ux2, uy2), aatg, abox); | |
| 126 | + } | |
| 127 | + | |
| 128 | + private static byte[] theTile; | |
| 129 | + | |
| 130 | + public synchronized static byte[] getAlphaTile(int len) { | |
| 131 | + byte[] t = theTile; | |
| 132 | + if (t == null || t.length < len) { | |
| 133 | + t = new byte[len]; | |
| 134 | + } else { | |
| 135 | + theTile = null; | |
| 136 | + } | |
| 137 | + return t; | |
| 138 | + } | |
| 139 | + | |
| 140 | + public synchronized static void dropAlphaTile(byte[] t) { | |
| 141 | + theTile = t; | |
| 142 | + } | |
| 143 | + | |
| 144 | + public void renderPath(SunGraphics2D sg, Shape s, BasicStroke bs) { | |
| 145 | + boolean adjust = (bs != null && | |
| 146 | + sg.strokeHint != SunHints.INTVAL_STROKE_PURE); | |
| 147 | + boolean thin = (sg.strokeState <= sg.STROKE_THINDASHED); | |
| 148 | + | |
| 149 | + Region clip = sg.getCompClip(); | |
| 150 | + int abox[] = new int[4]; | |
| 151 | + AATileGenerator aatg = | |
| 152 | + renderengine.getAATileGenerator(s, sg.transform, clip, | |
| 153 | + bs, thin, adjust, abox); | |
| 154 | + if (aatg == null) { | |
| 155 | + // Nothing to render | |
| 156 | + return; | |
| 157 | + } | |
| 158 | + | |
| 159 | + renderTiles(sg, s, aatg, abox); | |
| 160 | + } | |
| 161 | + | |
| 162 | + public void renderTiles(SunGraphics2D sg, Shape s, | |
| 163 | + AATileGenerator aatg, int abox[]) | |
| 164 | + { | |
| 165 | + Object context = null; | |
| 166 | + byte alpha[] = null; | |
| 167 | + try { | |
| 168 | + context = outpipe.startSequence(sg, s, | |
| 169 | + new Rectangle(abox[0], abox[1], | |
| 170 | + abox[2] - abox[0], | |
| 171 | + abox[3] - abox[1]), | |
| 172 | + abox); | |
| 173 | + | |
| 174 | + int tw = aatg.getTileWidth(); | |
| 175 | + int th = aatg.getTileHeight(); | |
| 176 | + alpha = getAlphaTile(tw * th); | |
| 177 | + | |
| 178 | + byte[] atile; | |
| 179 | + | |
| 180 | + for (int y = abox[1]; y < abox[3]; y += th) { | |
| 181 | + for (int x = abox[0]; x < abox[2]; x += tw) { | |
| 182 | + int w = Math.min(tw, abox[2] - x); | |
| 183 | + int h = Math.min(th, abox[3] - y); | |
| 184 | + | |
| 185 | + int a = aatg.getTypicalAlpha(); | |
| 186 | + if (a == 0x00 || | |
| 187 | + outpipe.needTile(context, x, y, w, h) == false) | |
| 188 | + { | |
| 189 | + aatg.nextTile(); | |
| 190 | + outpipe.skipTile(context, x, y); | |
| 191 | + continue; | |
| 192 | + } | |
| 193 | + if (a == 0xff) { | |
| 194 | + atile = null; | |
| 195 | + aatg.nextTile(); | |
| 196 | + } else { | |
| 197 | + atile = alpha; | |
| 198 | + aatg.getAlpha(alpha, 0, tw); | |
| 199 | + } | |
| 200 | + | |
| 201 | + outpipe.renderPathTile(context, atile, 0, tw, | |
| 202 | + x, y, w, h); | |
| 203 | + } | |
| 204 | + } | |
| 205 | + } finally { | |
| 206 | + aatg.dispose(); | |
| 207 | + if (context != null) { | |
| 208 | + outpipe.endSequence(context); | |
| 209 | + } | |
| 210 | + if (alpha != null) { | |
| 211 | + dropAlphaTile(alpha); | |
| 212 | + } | |
| 213 | + } | |
| 214 | + } | |
| 215 | +} | |