1 /*
2 * Copyright (c) 1997, 2016, 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 final AATileGenerator aatg,
147 final int[] abox, final TileState ts)
148 {
149 Object context = null;
150 try {
151 // defensive copy of int[] abox as local variables:
152 final int bx = abox[0];
153 final int by = abox[1];
154 final int bw = abox[2];
155 final int bh = abox[3];
156
157 // reentrance: outpipe may also use AAShapePipe:
158 context = outpipe.startSequence(sg, s,
159 ts.computeDevBox(abox),
160 abox);
161
162 final int tw = aatg.getTileWidth();
163 final int th = aatg.getTileHeight();
164
165 // get tile from thread local storage:
166 final byte[] alpha = ts.getAlphaTile(tw * th);
167 byte[] atile;
168
169 for (int y = by; y < bh; y += th) {
170 final int h = Math.min(th, bh - y);
171
172 for (int x = bx; x < bw; x += tw) {
173 final int w = Math.min(tw, bw - x);
174
175 final int a = aatg.getTypicalAlpha();
176
177 if (a == 0x00 || !outpipe.needTile(context, x, y, w, h)) {
178 aatg.nextTile();
179 outpipe.skipTile(context, x, y);
180 continue;
181 }
182 if (a == 0xff) {
183 atile = null;
184 aatg.nextTile();
185 } else {
186 atile = alpha;
187 aatg.getAlpha(alpha, 0, tw);
188 }
189
190 // TODO: check reentrance issue ? on byte[] alpha ?
191 outpipe.renderPathTile(context, atile, 0, tw, x, y, w, h);
192 }
193 }
194 } finally {
195 aatg.dispose();
196 if (context != null) {
197 outpipe.endSequence(context);
198 }
199 }
200 }
201
202 // Tile state used by AAShapePipe
203 static final class TileState {
204 // cached tile (32 x 32 tile by default)
205 private byte[] theTile = new byte[32 * 32];
206 // dirty aabox array
207 final int[] abox = new int[4];
208 // dirty bbox rectangle
209 private final Rectangle dev = new Rectangle();
210 // dirty bbox rectangle2D.Double
211 private final Rectangle2D.Double bbox2D = new Rectangle2D.Double();
212
213 byte[] getAlphaTile(int len) {
214 byte[] t = theTile;
215 if (t.length < len) {
216 // create a larger tile and may free current theTile (too small)
217 theTile = t = new byte[len];
218 }
219 return t;
220 }
221
222 Rectangle computeDevBox(final int[] abox) {
223 final Rectangle box = this.dev;
224 box.x = abox[0];
225 box.y = abox[1];
226 box.width = abox[2] - abox[0];
227 box.height = abox[3] - abox[1];
228 return box;
229 }
230
231 Rectangle2D computeBBox(double ux1, double uy1,
232 double ux2, double uy2)
233 {
234 if ((ux2 -= ux1) < 0.0) {
235 ux1 += ux2;
236 ux2 = -ux2;
237 }
238 if ((uy2 -= uy1) < 0.0) {
239 uy1 += uy2;
240 uy2 = -uy2;
241 }
242 final Rectangle2D.Double box = this.bbox2D;
243 box.x = ux1;
244 box.y = uy1;
245 box.width = ux2;
246 box.height = uy2;
247 return box;
248 }
249 }
250
251 }