1 /*
2 * Copyright (c) 2007, 2017, 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 com.sun.marlin;
27
28 import com.sun.javafx.geom.Path2D;
29 import com.sun.javafx.geom.PathConsumer2D;
30 import com.sun.javafx.geom.transform.BaseTransform;
31
32 public 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 // recycled PathConsumer2D instances from deltaTransformConsumer()
42 private final DeltaScaleFilter dt_DeltaScaleFilter = new DeltaScaleFilter();
43 private final DeltaTransformFilter dt_DeltaTransformFilter = new DeltaTransformFilter();
44
45 public PathConsumer2D wrapPath2D(Path2D p2d) {
46 return wp_Path2DWrapper.init(p2d);
47 }
48
49 public PathConsumer2D deltaTransformConsumer(PathConsumer2D out,
50 BaseTransform at)
51 {
52 if (at == null) {
53 return out;
54 }
55 float mxx = (float) at.getMxx();
56 float mxy = (float) at.getMxy();
57 float myx = (float) at.getMyx();
58 float myy = (float) at.getMyy();
59
60 if (mxy == 0.0f && myx == 0.0f) {
61 if (mxx == 1.0f && myy == 1.0f) {
62 return out;
63 } else {
64 return dt_DeltaScaleFilter.init(out, mxx, myy);
65 }
66 } else {
67 return dt_DeltaTransformFilter.init(out, mxx, mxy, myx, myy);
68 }
69 }
70
71 // recycled PathConsumer2D instances from inverseDeltaTransformConsumer()
72 private final DeltaScaleFilter iv_DeltaScaleFilter = new DeltaScaleFilter();
73 private final DeltaTransformFilter iv_DeltaTransformFilter = new DeltaTransformFilter();
74
75 public PathConsumer2D inverseDeltaTransformConsumer(PathConsumer2D out,
76 BaseTransform at)
77 {
78 if (at == null) {
79 return out;
80 }
81 float mxx = (float) at.getMxx();
82 float mxy = (float) at.getMxy();
83 float myx = (float) at.getMyx();
84 float myy = (float) at.getMyy();
85
86 if (mxy == 0.0f && myx == 0.0f) {
87 if (mxx == 1.0f && myy == 1.0f) {
88 return out;
89 } else {
90 return iv_DeltaScaleFilter.init(out, 1.0f/mxx, 1.0f/myy);
91 }
92 } else {
93 float det = mxx * myy - mxy * myx;
94 return iv_DeltaTransformFilter.init(out,
95 myy / det,
96 -mxy / det,
97 -myx / det,
98 mxx / det);
99 }
100 }
101
102 static final class DeltaScaleFilter implements PathConsumer2D {
103 private PathConsumer2D out;
104 private float sx, sy;
105
106 DeltaScaleFilter() {}
107
108 DeltaScaleFilter init(PathConsumer2D out,
109 float mxx, float myy)
110 {
111 this.out = out;
112 sx = mxx;
113 sy = myy;
114 return this; // fluent API
115 }
116
117 @Override
118 public void moveTo(float x0, float y0) {
119 out.moveTo(x0 * sx, y0 * sy);
120 }
121
122 @Override
123 public void lineTo(float x1, float y1) {
124 out.lineTo(x1 * sx, y1 * sy);
125 }
126
127 @Override
128 public void quadTo(float x1, float y1,
129 float x2, float y2)
130 {
131 out.quadTo(x1 * sx, y1 * sy,
132 x2 * sx, y2 * sy);
133 }
134
135 @Override
136 public void curveTo(float x1, float y1,
137 float x2, float y2,
138 float x3, float y3)
139 {
140 out.curveTo(x1 * sx, y1 * sy,
141 x2 * sx, y2 * sy,
142 x3 * sx, y3 * sy);
143 }
144
145 @Override
146 public void closePath() {
147 out.closePath();
148 }
149
150 @Override
151 public void pathDone() {
152 out.pathDone();
153 }
154 }
155
156 static final class DeltaTransformFilter implements PathConsumer2D {
157 private PathConsumer2D out;
158 private float mxx, mxy, myx, myy;
159
160 DeltaTransformFilter() {}
161
162 DeltaTransformFilter init(PathConsumer2D out,
163 float mxx, float mxy,
164 float myx, float myy)
165 {
166 this.out = out;
167 this.mxx = mxx;
168 this.mxy = mxy;
169 this.myx = myx;
170 this.myy = myy;
171 return this; // fluent API
172 }
173
174 @Override
175 public void moveTo(float x0, float y0) {
176 out.moveTo(x0 * mxx + y0 * mxy,
177 x0 * myx + y0 * myy);
178 }
179
180 @Override
181 public void lineTo(float x1, float y1) {
182 out.lineTo(x1 * mxx + y1 * mxy,
183 x1 * myx + y1 * myy);
184 }
185
186 @Override
187 public void quadTo(float x1, float y1,
188 float x2, float y2)
189 {
190 out.quadTo(x1 * mxx + y1 * mxy,
191 x1 * myx + y1 * myy,
192 x2 * mxx + y2 * mxy,
193 x2 * myx + y2 * myy);
194 }
195
196 @Override
197 public void curveTo(float x1, float y1,
198 float x2, float y2,
199 float x3, float y3)
200 {
201 out.curveTo(x1 * mxx + y1 * mxy,
202 x1 * myx + y1 * myy,
203 x2 * mxx + y2 * mxy,
204 x2 * myx + y2 * myy,
205 x3 * mxx + y3 * mxy,
206 x3 * myx + y3 * myy);
207 }
208
209 @Override
210 public void closePath() {
211 out.closePath();
212 }
213
214 @Override
215 public void pathDone() {
216 out.pathDone();
217 }
218 }
219
220 static final class Path2DWrapper implements PathConsumer2D {
221 private Path2D p2d;
222
223 Path2DWrapper() {}
224
225 Path2DWrapper init(Path2D p2d) {
226 this.p2d = p2d;
227 return this;
228 }
229
230 @Override
231 public void moveTo(float x0, float y0) {
232 p2d.moveTo(x0, y0);
233 }
234
235 @Override
236 public void lineTo(float x1, float y1) {
237 p2d.lineTo(x1, y1);
238 }
239
240 @Override
241 public void closePath() {
242 p2d.closePath();
243 }
244
245 @Override
246 public void pathDone() {}
247
248 @Override
249 public void curveTo(float x1, float y1,
250 float x2, float y2,
251 float x3, float y3)
252 {
253 p2d.curveTo(x1, y1, x2, y2, x3, y3);
254 }
255
256 @Override
257 public void quadTo(float x1, float y1, float x2, float y2) {
258 p2d.quadTo(x1, y1, x2, y2);
259 }
260 }
261 }