1 /*
2 * Copyright (c) 1998, 2007, 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 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 static final 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 implements LoopBasedPipe
70 {
71 public Object startSequence(SunGraphics2D sg, Shape s,
72 Rectangle devR, int[] bbox) {
73 return sg;
74 }
75
76 public void renderBox(Object ctx, int x, int y, int w, int h) {
77 SunGraphics2D sg2d = (SunGraphics2D) ctx;
78 SurfaceData sd = sg2d.getSurfaceData();
79 sg2d.loops.fillRectLoop.FillRect(sg2d, sd, x, y, w, h);
80 }
81
82 public void endSequence(Object ctx) {
83 }
84 }
85
86 public void draw(SunGraphics2D sg, Shape s) {
87 if (sg.stroke instanceof BasicStroke) {
88 ShapeSpanIterator sr = LoopPipe.getStrokeSpans(sg, s);
89 try {
90 renderSpans(sg, sg.getCompClip(), s, sr);
91 } finally {
92 sr.dispose();
93 }
94 } else {
95 fill(sg, sg.stroke.createStrokedShape(s));
96 }
97 }
98
99 public static final int NON_RECTILINEAR_TRANSFORM_MASK =
100 (AffineTransform.TYPE_GENERAL_TRANSFORM |
101 AffineTransform.TYPE_GENERAL_ROTATION);
102
103 public void fill(SunGraphics2D sg, Shape s) {
104 if (s instanceof Rectangle2D &&
105 (sg.transform.getType() & NON_RECTILINEAR_TRANSFORM_MASK) == 0)
106 {
107 renderRect(sg, (Rectangle2D) s);
108 return;
109 }
110
111 Region clipRegion = sg.getCompClip();
112 ShapeSpanIterator sr = LoopPipe.getFillSSI(sg);
113 try {
114 sr.setOutputArea(clipRegion);
115 sr.appendPath(s.getPathIterator(sg.transform));
116 renderSpans(sg, clipRegion, s, sr);
117 } finally {
118 sr.dispose();
119 }
120 }
121
122 public abstract Object startSequence(SunGraphics2D sg, Shape s,
123 Rectangle devR, int[] bbox);
124
125 public abstract void renderBox(Object ctx, int x, int y, int w, int h);
126
127 public abstract void endSequence(Object ctx);
128
129 public void renderRect(SunGraphics2D sg, Rectangle2D r) {
130 double corners[] = {
131 r.getX(), r.getY(), r.getWidth(), r.getHeight(),
132 };
133 corners[2] += corners[0];
134 corners[3] += corners[1];
135 if (corners[2] <= corners[0] || corners[3] <= corners[1]) {
136 return;
137 }
138 sg.transform.transform(corners, 0, corners, 0, 2);
139 if (corners[2] < corners[0]) {
140 double t = corners[2];
141 corners[2] = corners[0];
142 corners[0] = t;
143 }
144 if (corners[3] < corners[1]) {
145 double t = corners[3];
146 corners[3] = corners[1];
147 corners[1] = t;
148 }
149 int abox[] = {
150 (int) corners[0],
151 (int) corners[1],
152 (int) corners[2],
153 (int) corners[3],
154 };
155 Rectangle devR = new Rectangle(abox[0], abox[1],
156 abox[2] - abox[0],
157 abox[3] - abox[1]);
158 Region clipRegion = sg.getCompClip();
159 clipRegion.clipBoxToBounds(abox);
160 if (abox[0] >= abox[2] || abox[1] >= abox[3]) {
161 return;
162 }
163 Object context = startSequence(sg, r, devR, abox);
164 if (clipRegion.isRectangular()) {
165 renderBox(context, abox[0], abox[1],
166 abox[2] - abox[0],
167 abox[3] - abox[1]);
168 } else {
169 SpanIterator sr = clipRegion.getSpanIterator(abox);
170 while (sr.nextSpan(abox)) {
171 renderBox(context, abox[0], abox[1],
172 abox[2] - abox[0],
173 abox[3] - abox[1]);
174 }
175 }
176 endSequence(context);
177 }
178
179 public void renderSpans(SunGraphics2D sg, Region clipRegion, Shape s,
180 ShapeSpanIterator sr)
181 {
182 Object context = null;
183 int abox[] = new int[4];
184 try {
185 sr.getPathBox(abox);
186 Rectangle devR = new Rectangle(abox[0], abox[1],
187 abox[2] - abox[0],
188 abox[3] - abox[1]);
189 clipRegion.clipBoxToBounds(abox);
190 if (abox[0] >= abox[2] || abox[1] >= abox[3]) {
191 return;
192 }
193 sr.intersectClipBox(abox[0], abox[1], abox[2], abox[3]);
194 context = startSequence(sg, s, devR, abox);
195
196 spanClipLoop(context, sr, clipRegion, abox);
197
198 } finally {
199 if (context != null) {
200 endSequence(context);
201 }
202 }
203 }
204
205 public void spanClipLoop(Object ctx, SpanIterator sr,
206 Region r, int[] abox) {
207 if (!r.isRectangular()) {
208 sr = r.filter(sr);
209 }
210 while (sr.nextSpan(abox)) {
211 int x = abox[0];
212 int y = abox[1];
213 renderBox(ctx, x, y, abox[2] - x, abox[3] - y);
214 }
215 }
216 }