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 }
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