1 /*
2 * Copyright (c) 1997, 2013, 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 private static synchronized 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 private static synchronized 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 <= SunGraphics2D.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 }