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     {
  47         return wp_Path2DWrapper.init(p2d);
  48     }
  49 
  50     public PathConsumer2D deltaTransformConsumer(PathConsumer2D out,
  51                                                  BaseTransform at)
  52     {
  53         if (at == null) {
  54             return out;
  55         }
  56         float mxx = (float) at.getMxx();
  57         float mxy = (float) at.getMxy();
  58         float myx = (float) at.getMyx();
  59         float myy = (float) at.getMyy();
  60 
  61         if (mxy == 0.0f && myx == 0.0f) {
  62             if (mxx == 1.0f && myy == 1.0f) {
  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     public PathConsumer2D inverseDeltaTransformConsumer(PathConsumer2D out,
  77                                                         BaseTransform at)
  78     {
  79         if (at == null) {
  80             return out;
  81         }
  82         float mxx = (float) at.getMxx();
  83         float mxy = (float) at.getMxy();
  84         float myx = (float) at.getMyx();
  85         float myy = (float) at.getMyy();
  86 
  87         if (mxy == 0.0f && myx == 0.0f) {
  88             if (mxx == 1.0f && myy == 1.0f) {
  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     static final class DeltaScaleFilter implements PathConsumer2D {
 104         private PathConsumer2D out;
 105         private float sx, sy;
 106 
 107         DeltaScaleFilter() {}
 108 
 109         DeltaScaleFilter init(PathConsumer2D out,
 110                               float mxx, float myy)
 111         {
 112             this.out = out;
 113             sx = mxx;
 114             sy = myy;
 115             return this; // fluent API
 116         }
 117 
 118         @Override
 119         public void moveTo(float x0, float y0) {
 120             out.moveTo(x0 * sx, y0 * sy);
 121         }
 122 
 123         @Override
 124         public void lineTo(float x1, float y1) {
 125             out.lineTo(x1 * sx, y1 * sy);
 126         }
 127 
 128         @Override
 129         public void quadTo(float x1, float y1,
 130                            float x2, float y2)
 131         {
 132             out.quadTo(x1 * sx, y1 * sy,
 133                        x2 * sx, y2 * sy);
 134         }
 135 
 136         @Override
 137         public void curveTo(float x1, float y1,
 138                             float x2, float y2,
 139                             float x3, float y3)
 140         {
 141             out.curveTo(x1 * sx, y1 * sy,
 142                         x2 * sx, y2 * sy,
 143                         x3 * sx, y3 * sy);
 144         }
 145 
 146         @Override
 147         public void closePath() {
 148             out.closePath();
 149         }
 150 
 151         @Override
 152         public void pathDone() {
 153             out.pathDone();
 154         }
 155     }
 156 
 157     static final class DeltaTransformFilter implements PathConsumer2D {
 158         private PathConsumer2D out;
 159         private float mxx, mxy, myx, myy;
 160 
 161         DeltaTransformFilter() {}
 162 
 163         DeltaTransformFilter init(PathConsumer2D out,
 164                                   float mxx, float mxy,
 165                                   float myx, float myy)
 166         {
 167             this.out = out;
 168             this.mxx = mxx;
 169             this.mxy = mxy;
 170             this.myx = myx;
 171             this.myy = myy;
 172             return this; // fluent API
 173         }
 174 
 175         @Override
 176         public void moveTo(float x0, float y0) {
 177             out.moveTo(x0 * mxx + y0 * mxy,
 178                        x0 * myx + y0 * myy);
 179         }
 180 
 181         @Override
 182         public void lineTo(float x1, float y1) {
 183             out.lineTo(x1 * mxx + y1 * mxy,
 184                        x1 * myx + y1 * myy);
 185         }
 186 
 187         @Override
 188         public void quadTo(float x1, float y1,
 189                            float x2, float y2)
 190         {
 191             out.quadTo(x1 * mxx + y1 * mxy,
 192                        x1 * myx + y1 * myy,
 193                        x2 * mxx + y2 * mxy,
 194                        x2 * myx + y2 * myy);
 195         }
 196 
 197         @Override
 198         public void curveTo(float x1, float y1,
 199                             float x2, float y2,
 200                             float x3, float y3)
 201         {
 202             out.curveTo(x1 * mxx + y1 * mxy,
 203                         x1 * myx + y1 * myy,
 204                         x2 * mxx + y2 * mxy,
 205                         x2 * myx + y2 * myy,
 206                         x3 * mxx + y3 * mxy,
 207                         x3 * myx + y3 * myy);
 208         }
 209 
 210         @Override
 211         public void closePath() {
 212             out.closePath();
 213         }
 214 
 215         @Override
 216         public void pathDone() {
 217             out.pathDone();
 218         }
 219     }
 220 
 221     static final class Path2DWrapper implements PathConsumer2D {
 222         private Path2D p2d;
 223 
 224         Path2DWrapper() {}
 225 
 226         Path2DWrapper init(Path2D p2d) {
 227             this.p2d = p2d;
 228             return this;
 229         }
 230 
 231         @Override
 232         public void moveTo(float x0, float y0) {
 233             p2d.moveTo(x0, y0);
 234         }
 235 
 236         @Override
 237         public void lineTo(float x1, float y1) {
 238             p2d.lineTo(x1, y1);
 239         }
 240 
 241         @Override
 242         public void closePath() {
 243             p2d.closePath();
 244         }
 245 
 246         @Override
 247         public void pathDone() {}
 248 
 249         @Override
 250         public void curveTo(float x1, float y1,
 251                             float x2, float y2,
 252                             float x3, float y3)
 253         {
 254             p2d.curveTo(x1, y1, x2, y2, x3, y3);
 255         }
 256 
 257         @Override
 258         public void quadTo(float x1, float y1, float x2, float y2) {
 259             p2d.quadTo(x1, y1, x2, y2);
 260         }
 261     }
 262 }