1 /*
2 * Copyright 1998-2007 Sun Microsystems, Inc. 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. Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any questions.
24 */
25
26 package sun.java2d.pipe;
27
28 import sun.java2d.SunGraphics2D;
29 import sun.java2d.SurfaceData;
30 import java.awt.Rectangle;
31 import java.awt.Shape;
32 import java.awt.BasicStroke;
33 import java.awt.geom.PathIterator;
34 import java.awt.geom.AffineTransform;
35 import java.awt.geom.Rectangle2D;
36 import sun.awt.SunHints;
37
38 /**
39 * This class is used to convert raw geometry into a span iterator
40 * object using a simple flattening polygon scan converter.
41 * The iterator can be passed on to special SpanFiller loops to
42 * perform the actual rendering.
43 */
44 public abstract class SpanShapeRenderer implements ShapeDrawPipe {
45 final static RenderingEngine RenderEngine = RenderingEngine.getInstance();
46
47 public static class Composite extends SpanShapeRenderer {
48 CompositePipe comppipe;
49
50 public Composite(CompositePipe pipe) {
51 comppipe = pipe;
52 }
53
54 public Object startSequence(SunGraphics2D sg, Shape s,
55 Rectangle devR, int[] bbox) {
56 return comppipe.startSequence(sg, s, devR, bbox);
57 }
58
59 public void renderBox(Object ctx, int x, int y, int w, int h) {
60 comppipe.renderPathTile(ctx, null, 0, w, x, y, w, h);
61 }
62
63 public void endSequence(Object ctx) {
64 comppipe.endSequence(ctx);
65 }
66 }
67
68 public static class Simple extends SpanShapeRenderer {
69 public Object startSequence(SunGraphics2D sg, Shape s,
70 Rectangle devR, int[] bbox) {
71 return sg;
72 }
73
74 public void renderBox(Object ctx, int x, int y, int w, int h) {
75 SunGraphics2D sg2d = (SunGraphics2D) ctx;
76 SurfaceData sd = sg2d.getSurfaceData();
77 sg2d.getLoops().fillRectLoop.FillRect(sg2d, sd, x, y, w, h);
78 }
79
80 public void endSequence(Object ctx) {
81 }
82 }
83
84 public void draw(SunGraphics2D sg, Shape s) {
85 if (sg.stroke instanceof BasicStroke) {
86 ShapeSpanIterator sr = LoopPipe.getStrokeSpans(sg, s);
87 try {
88 renderSpans(sg, sg.getCompClip(), s, sr);
89 } finally {
90 sr.dispose();
91 }
92 } else {
93 fill(sg, sg.stroke.createStrokedShape(s));
94 }
95 }
96
97 public static final int NON_RECTILINEAR_TRANSFORM_MASK =
98 (AffineTransform.TYPE_GENERAL_TRANSFORM |
99 AffineTransform.TYPE_GENERAL_ROTATION);
100
101 public void fill(SunGraphics2D sg, Shape s) {
102 if (s instanceof Rectangle2D &&
103 (sg.transform.getType() & NON_RECTILINEAR_TRANSFORM_MASK) == 0)
104 {
105 renderRect(sg, (Rectangle2D) s);
106 return;
107 }
108
109 Region clipRegion = sg.getCompClip();
110 ShapeSpanIterator sr = LoopPipe.getFillSSI(sg);
111 try {
112 sr.setOutputArea(clipRegion);
113 sr.appendPath(s.getPathIterator(sg.transform));
114 renderSpans(sg, clipRegion, s, sr);
115 } finally {
116 sr.dispose();
117 }
118 }
119
120 public abstract Object startSequence(SunGraphics2D sg, Shape s,
121 Rectangle devR, int[] bbox);
122
123 public abstract void renderBox(Object ctx, int x, int y, int w, int h);
124
125 public abstract void endSequence(Object ctx);
126
127 public void renderRect(SunGraphics2D sg, Rectangle2D r) {
128 double corners[] = {
129 r.getX(), r.getY(), r.getWidth(), r.getHeight(),
130 };
131 corners[2] += corners[0];
132 corners[3] += corners[1];
133 if (corners[2] <= corners[0] || corners[3] <= corners[1]) {
134 return;
135 }
136 sg.transform.transform(corners, 0, corners, 0, 2);
137 if (corners[2] < corners[0]) {
138 double t = corners[2];
139 corners[2] = corners[0];
140 corners[0] = t;
141 }
142 if (corners[3] < corners[1]) {
143 double t = corners[3];
144 corners[3] = corners[1];
145 corners[1] = t;
146 }
147 int abox[] = {
148 (int) corners[0],
149 (int) corners[1],
150 (int) corners[2],
151 (int) corners[3],
152 };
153 Rectangle devR = new Rectangle(abox[0], abox[1],
154 abox[2] - abox[0],
155 abox[3] - abox[1]);
156 Region clipRegion = sg.getCompClip();
157 clipRegion.clipBoxToBounds(abox);
158 if (abox[0] >= abox[2] || abox[1] >= abox[3]) {
159 return;
160 }
161 Object context = startSequence(sg, r, devR, abox);
162 if (clipRegion.isRectangular()) {
163 renderBox(context, abox[0], abox[1],
164 abox[2] - abox[0],
165 abox[3] - abox[1]);
166 } else {
167 SpanIterator sr = clipRegion.getSpanIterator(abox);
168 while (sr.nextSpan(abox)) {
169 renderBox(context, abox[0], abox[1],
170 abox[2] - abox[0],
171 abox[3] - abox[1]);
172 }
173 }
174 endSequence(context);
175 }
176
177 public void renderSpans(SunGraphics2D sg, Region clipRegion, Shape s,
178 ShapeSpanIterator sr)
179 {
180 Object context = null;
181 int abox[] = new int[4];
182 try {
183 sr.getPathBox(abox);
184 Rectangle devR = new Rectangle(abox[0], abox[1],
185 abox[2] - abox[0],
186 abox[3] - abox[1]);
187 clipRegion.clipBoxToBounds(abox);
188 if (abox[0] >= abox[2] || abox[1] >= abox[3]) {
189 return;
190 }
191 sr.intersectClipBox(abox[0], abox[1], abox[2], abox[3]);
192 context = startSequence(sg, s, devR, abox);
193
194 spanClipLoop(context, sr, clipRegion, abox);
195
196 } finally {
197 if (context != null) {
198 endSequence(context);
199 }
200 }
201 }
202
203 public void spanClipLoop(Object ctx, SpanIterator sr,
204 Region r, int[] abox) {
205 if (!r.isRectangular()) {
206 sr = r.filter(sr);
207 }
208 while (sr.nextSpan(abox)) {
209 int x = abox[0];
210 int y = abox[1];
211 renderBox(ctx, x, y, abox[2] - x, abox[3] - y);
212 }
213 }
214 }