1 /*
2 * Copyright (c) 2007, 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
26 package sun.java2d.marlin;
27
28 import sun.awt.geom.PathConsumer2D;
29 import java.awt.geom.AffineTransform;
30 import java.awt.geom.Path2D;
31
32 final class TransformingPathConsumer2D {
33
34 TransformingPathConsumer2D() {
35 // used by RendererContext
36 }
37
38 // recycled PathConsumer2D instance from wrapPath2d()
39 private final Path2DWrapper wp_Path2DWrapper = new Path2DWrapper();
40
41 PathConsumer2D wrapPath2d(Path2D.Float p2d)
42 {
43 return wp_Path2DWrapper.init(p2d);
44 }
45
46 // recycled PathConsumer2D instances from deltaTransformConsumer()
47 private final DeltaScaleFilter dt_DeltaScaleFilter = new DeltaScaleFilter();
48 private final DeltaTransformFilter dt_DeltaTransformFilter = new DeltaTransformFilter();
49
50 PathConsumer2D deltaTransformConsumer(PathConsumer2D out,
51 AffineTransform at)
52 {
53 if (at == null) {
54 return out;
55 }
56 float mxx = (float) at.getScaleX();
57 float mxy = (float) at.getShearX();
58 float myx = (float) at.getShearY();
59 float myy = (float) at.getScaleY();
60
61 if (mxy == 0f && myx == 0f) {
62 if (mxx == 1f && myy == 1f) {
63 return out;
64 } else {
65 return dt_DeltaScaleFilter.init(out, mxx, myy);
66 }
67 } else {
68 return dt_DeltaTransformFilter.init(out, mxx, mxy, myx, myy);
69 }
70 }
71
72 // recycled PathConsumer2D instances from inverseDeltaTransformConsumer()
73 private final DeltaScaleFilter iv_DeltaScaleFilter = new DeltaScaleFilter();
74 private final DeltaTransformFilter iv_DeltaTransformFilter = new DeltaTransformFilter();
75
76 PathConsumer2D inverseDeltaTransformConsumer(PathConsumer2D out,
77 AffineTransform at)
78 {
79 if (at == null) {
80 return out;
81 }
82 float mxx = (float) at.getScaleX();
83 float mxy = (float) at.getShearX();
84 float myx = (float) at.getShearY();
85 float myy = (float) at.getScaleY();
86
87 if (mxy == 0f && myx == 0f) {
88 if (mxx == 1f && myy == 1f) {
89 return out;
90 } else {
91 return iv_DeltaScaleFilter.init(out, 1.0f/mxx, 1.0f/myy);
92 }
93 } else {
94 float det = mxx * myy - mxy * myx;
95 return iv_DeltaTransformFilter.init(out,
96 myy / det,
97 -mxy / det,
98 -myx / det,
99 mxx / det);
100 }
101 }
102
103
104 static final class DeltaScaleFilter implements PathConsumer2D {
105 private PathConsumer2D out;
106 private float sx, sy;
107
108 DeltaScaleFilter() {}
109
110 DeltaScaleFilter init(PathConsumer2D out,
111 float mxx, float myy)
112 {
113 this.out = out;
114 sx = mxx;
115 sy = myy;
116 return this; // fluent API
117 }
118
119 @Override
120 public void moveTo(float x0, float y0) {
121 out.moveTo(x0 * sx, y0 * sy);
122 }
123
124 @Override
125 public void lineTo(float x1, float y1) {
126 out.lineTo(x1 * sx, y1 * sy);
127 }
128
129 @Override
130 public void quadTo(float x1, float y1,
131 float x2, float y2)
132 {
133 out.quadTo(x1 * sx, y1 * sy,
134 x2 * sx, y2 * sy);
135 }
136
137 @Override
138 public void curveTo(float x1, float y1,
139 float x2, float y2,
140 float x3, float y3)
141 {
142 out.curveTo(x1 * sx, y1 * sy,
143 x2 * sx, y2 * sy,
144 x3 * sx, y3 * sy);
145 }
146
147 @Override
148 public void closePath() {
149 out.closePath();
150 }
151
152 @Override
153 public void pathDone() {
154 out.pathDone();
155 }
156
157 @Override
158 public long getNativeConsumer() {
159 return 0;
160 }
161 }
162
163 static final class DeltaTransformFilter implements PathConsumer2D {
164 private PathConsumer2D out;
165 private float mxx, mxy, myx, myy;
166
167 DeltaTransformFilter() {}
168
169 DeltaTransformFilter init(PathConsumer2D out,
170 float mxx, float mxy,
171 float myx, float myy)
172 {
173 this.out = out;
174 this.mxx = mxx;
175 this.mxy = mxy;
176 this.myx = myx;
177 this.myy = myy;
178 return this; // fluent API
179 }
180
181 @Override
182 public void moveTo(float x0, float y0) {
183 out.moveTo(x0 * mxx + y0 * mxy,
184 x0 * myx + y0 * myy);
185 }
186
187 @Override
188 public void lineTo(float x1, float y1) {
189 out.lineTo(x1 * mxx + y1 * mxy,
190 x1 * myx + y1 * myy);
191 }
192
193 @Override
194 public void quadTo(float x1, float y1,
195 float x2, float y2)
196 {
197 out.quadTo(x1 * mxx + y1 * mxy,
198 x1 * myx + y1 * myy,
199 x2 * mxx + y2 * mxy,
200 x2 * myx + y2 * myy);
201 }
202
203 @Override
204 public void curveTo(float x1, float y1,
205 float x2, float y2,
206 float x3, float y3)
207 {
208 out.curveTo(x1 * mxx + y1 * mxy,
209 x1 * myx + y1 * myy,
210 x2 * mxx + y2 * mxy,
211 x2 * myx + y2 * myy,
212 x3 * mxx + y3 * mxy,
213 x3 * myx + y3 * myy);
214 }
215
216 @Override
217 public void closePath() {
218 out.closePath();
219 }
220
221 @Override
222 public void pathDone() {
223 out.pathDone();
224 }
225
226 @Override
227 public long getNativeConsumer() {
228 return 0;
229 }
230 }
231
232 static final class Path2DWrapper implements PathConsumer2D {
233 private Path2D.Float p2d;
234
235 Path2DWrapper() {}
236
237 Path2DWrapper init(Path2D.Float p2d) {
238 this.p2d = p2d;
239 return this;
240 }
241
242 @Override
243 public void moveTo(float x0, float y0) {
244 p2d.moveTo(x0, y0);
245 }
246
247 @Override
248 public void lineTo(float x1, float y1) {
249 p2d.lineTo(x1, y1);
250 }
251
252 @Override
253 public void closePath() {
254 p2d.closePath();
255 }
256
257 @Override
258 public void pathDone() {}
259
260 @Override
261 public void curveTo(float x1, float y1,
262 float x2, float y2,
263 float x3, float y3)
264 {
265 p2d.curveTo(x1, y1, x2, y2, x3, y3);
266 }
267
268 @Override
269 public void quadTo(float x1, float y1, float x2, float y2) {
270 p2d.quadTo(x1, y1, x2, y2);
271 }
272
273 @Override
274 public long getNativeConsumer() {
275 throw new InternalError("Not using a native peer");
276 }
277 }
278 }