1 /*
2 * Copyright (c) 1997, 2015, 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 package sun.java2d.pipe;
26
27 import java.awt.BasicStroke;
28 import java.awt.Rectangle;
29 import java.awt.Shape;
30 import java.awt.geom.Rectangle2D;
31 import sun.awt.SunHints;
32 import sun.java2d.SunGraphics2D;
33
34 /**
35 * This class is used to convert raw geometry into 8-bit alpha tiles
36 * using an AATileGenerator for application by the next stage of
37 * the pipeline.
38 * This class sets up the Generator and computes the alpha tiles
39 * and then passes them on to a CompositePipe object for painting.
40 */
41 public class AAShapePipe
42 implements ShapeDrawPipe, ParallelogramPipe
43 {
44 static RenderingEngine renderengine = RenderingEngine.getInstance();
45
46 // Per-thread TileState (~1K very small so do not use any Weak Reference)
47 private static final ThreadLocal<TileState> tileStateThreadLocal =
48 new ThreadLocal<TileState>() {
49 @Override
50 protected TileState initialValue() {
51 return new TileState();
52 }
53 };
54
55 CompositePipe outpipe;
56
57 public AAShapePipe(CompositePipe pipe) {
58 outpipe = pipe;
59 }
60
61 public void draw(SunGraphics2D sg, Shape s) {
62 BasicStroke bs;
63
64 if (sg.stroke instanceof BasicStroke) {
65 bs = (BasicStroke) sg.stroke;
66 } else {
67 s = sg.stroke.createStrokedShape(s);
68 bs = null;
69 }
70
71 renderPath(sg, s, bs);
72 }
73
74 public void fill(SunGraphics2D sg, Shape s) {
75 renderPath(sg, s, null);
76 }
77
78 public void fillParallelogram(SunGraphics2D sg,
79 double ux1, double uy1,
80 double ux2, double uy2,
81 double x, double y,
82 double dx1, double dy1,
83 double dx2, double dy2)
84 {
85 Region clip = sg.getCompClip();
86 final TileState ts = tileStateThreadLocal.get();
87 final int[] abox = ts.abox;
88
89 AATileGenerator aatg =
90 renderengine.getAATileGenerator(x, y, dx1, dy1, dx2, dy2, 0, 0,
91 clip, abox);
92 if (aatg == null) {
93 // Nothing to render
94 return;
95 }
96
97 renderTiles(sg, ts.computeBBox(ux1, uy1, ux2, uy2), aatg, abox, ts);
98 }
99
100 public void drawParallelogram(SunGraphics2D sg,
101 double ux1, double uy1,
102 double ux2, double uy2,
103 double x, double y,
104 double dx1, double dy1,
105 double dx2, double dy2,
106 double lw1, double lw2)
107 {
108 Region clip = sg.getCompClip();
109 final TileState ts = tileStateThreadLocal.get();
110 final int[] abox = ts.abox;
111
112 AATileGenerator aatg =
113 renderengine.getAATileGenerator(x, y, dx1, dy1, dx2, dy2, lw1, lw2,
114 clip, abox);
115 if (aatg == null) {
116 // Nothing to render
117 return;
118 }
119
120 // Note that bbox is of the original shape, not the wide path.
121 // This is appropriate for handing to Paint methods...
122 renderTiles(sg, ts.computeBBox(ux1, uy1, ux2, uy2), aatg, abox, ts);
123 }
124
125 public void renderPath(SunGraphics2D sg, Shape s, BasicStroke bs) {
126 boolean adjust = (bs != null &&
127 sg.strokeHint != SunHints.INTVAL_STROKE_PURE);
128 boolean thin = (sg.strokeState <= SunGraphics2D.STROKE_THINDASHED);
129
130 Region clip = sg.getCompClip();
131 final TileState ts = tileStateThreadLocal.get();
132 final int[] abox = ts.abox;
133
134 AATileGenerator aatg =
135 renderengine.getAATileGenerator(s, sg.transform, clip,
136 bs, thin, adjust, abox);
137 if (aatg == null) {
138 // Nothing to render
139 return;
140 }
141
142 renderTiles(sg, s, aatg, abox, ts);
143 }
144
145 public void renderTiles(SunGraphics2D sg, Shape s,
146 AATileGenerator aatg, int abox[], TileState ts)
147 {
148 Object context = null;
149 try {
150 context = outpipe.startSequence(sg, s,
151 ts.computeDevBox(abox),
152 abox);
153
154 final int tw = aatg.getTileWidth();
155 final int th = aatg.getTileHeight();
156
157 // get tile from thread local storage:
158 final byte[] alpha = ts.getAlphaTile(tw * th);
159 byte[] atile;
160
161 for (int y = abox[1]; y < abox[3]; y += th) {
162 int h = Math.min(th, abox[3] - y);
163
164 for (int x = abox[0]; x < abox[2]; x += tw) {
165 int w = Math.min(tw, abox[2] - x);
166
167 int a = aatg.getTypicalAlpha();
168 if (a == 0x00 ||
169 outpipe.needTile(context, x, y, w, h) == false)
170 {
171 aatg.nextTile();
172 outpipe.skipTile(context, x, y);
173 continue;
174 }
175 if (a == 0xff) {
176 atile = null;
177 aatg.nextTile();
178 } else {
179 atile = alpha;
180 aatg.getAlpha(alpha, 0, tw);
181 }
182
183 outpipe.renderPathTile(context, atile, 0, tw,
184 x, y, w, h);
185 }
186 }
187 } finally {
188 aatg.dispose();
189 if (context != null) {
190 outpipe.endSequence(context);
191 }
192 }
193 }
194
195 // Tile state used by AAShapePipe
196 static final class TileState {
197 // cached tile (32 x 32 tile by default)
198 private byte[] theTile = new byte[32 * 32];
199 // dirty aabox array
200 final int[] abox = new int[4];
201 // dirty bbox rectangle
202 private final Rectangle dev = new Rectangle();
203 // dirty bbox rectangle2D.Double
204 private final Rectangle2D.Double bbox2D = new Rectangle2D.Double();
205
206 byte[] getAlphaTile(int len) {
207 byte[] t = theTile;
208 if (t.length < len) {
209 // create a larger tile and may free current theTile (too small)
210 theTile = t = new byte[len];
211 }
212 return t;
213 }
214
215 Rectangle computeDevBox(final int[] abox) {
216 final Rectangle box = this.dev;
217 box.x = abox[0];
218 box.y = abox[1];
219 box.width = abox[2] - abox[0];
220 box.height = abox[3] - abox[1];
221 return box;
222 }
223
224 Rectangle2D computeBBox(double ux1, double uy1,
225 double ux2, double uy2)
226 {
227 if ((ux2 -= ux1) < 0.0) {
228 ux1 += ux2;
229 ux2 = -ux2;
230 }
231 if ((uy2 -= uy1) < 0.0) {
232 uy1 += uy2;
233 uy2 = -uy2;
234 }
235 final Rectangle2D.Double box = this.bbox2D;
236 box.x = ux1;
237 box.y = uy1;
238 box.width = ux2;
239 box.height = uy2;
240 return box;
241 }
242 }
243
244 }