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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 | } | ||