1 /*
   2  *
   3  * Copyright (c) 2007, 2011, Oracle and/or its affiliates. All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  *   - Redistributions of source code must retain the above copyright
  10  *     notice, this list of conditions and the following disclaimer.
  11  *
  12  *   - Redistributions in binary form must reproduce the above copyright
  13  *     notice, this list of conditions and the following disclaimer in the
  14  *     documentation and/or other materials provided with the distribution.
  15  *
  16  *   - Neither the name of Oracle nor the names of its
  17  *     contributors may be used to endorse or promote products derived
  18  *     from this software without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  21  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  22  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  24  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  25  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  26  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  27  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  28  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  29  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  30  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31  */
  32 package java2d.demos.Images;
  33 
  34 
  35 import java.awt.Color;
  36 import java.awt.Graphics2D;
  37 import java.awt.Image;
  38 import java.awt.geom.CubicCurve2D;
  39 import java.awt.geom.PathIterator;
  40 import java.awt.geom.Point2D;
  41 import java2d.AnimatingSurface;
  42 
  43 
  44 /**
  45  * Warps a image on a CubicCurve2D flattened path.
  46  */
  47 @SuppressWarnings("serial")
  48 public class WarpImage extends AnimatingSurface {
  49 
  50     private static int iw, ih, iw2, ih2;
  51     private static Image img;
  52     private static final int FORWARD = 0;
  53     private static final int BACK = 1;
  54     private Point2D pts[];
  55     private int direction = FORWARD;
  56     private int pNum;
  57     private int x, y;
  58 
  59     @SuppressWarnings("LeakingThisInConstructor")
  60     public WarpImage() {
  61         setBackground(Color.white);
  62         img = getImage("surfing.png");
  63         iw = img.getWidth(this);
  64         ih = img.getHeight(this);
  65         iw2 = iw / 2;
  66         ih2 = ih / 2;
  67     }
  68 
  69     @Override
  70     public void reset(int w, int h) {
  71         pNum = 0;
  72         direction = FORWARD;
  73         CubicCurve2D cc = new CubicCurve2D.Float(
  74                 w * .2f, h * .5f, w * .4f, 0, w * .6f, h, w * .8f, h * .5f);
  75         PathIterator pi = cc.getPathIterator(null, 0.1);
  76         Point2D tmp[] = new Point2D[200];
  77         int i = 0;
  78         while (!pi.isDone()) {
  79             float[] coords = new float[6];
  80             switch (pi.currentSegment(coords)) {
  81                 case PathIterator.SEG_MOVETO:
  82                 case PathIterator.SEG_LINETO:
  83                     tmp[i] = new Point2D.Float(coords[0], coords[1]);
  84             }
  85             i++;
  86             pi.next();
  87         }
  88         pts = new Point2D[i];
  89         System.arraycopy(tmp, 0, pts, 0, i);
  90     }
  91 
  92     @Override
  93     public void step(int w, int h) {
  94         if (pts == null) {
  95             return;
  96         }
  97         x = (int) pts[pNum].getX();
  98         y = (int) pts[pNum].getY();
  99         if (direction == FORWARD) {
 100             if (++pNum == pts.length) {
 101                 direction = BACK;
 102             }
 103         }
 104         if (direction == BACK) {
 105             if (--pNum == 0) {
 106                 direction = FORWARD;
 107             }
 108         }
 109     }
 110 
 111     @Override
 112     public void render(int w, int h, Graphics2D g2) {
 113         g2.drawImage(img,
 114                 0, 0, x, y,
 115                 0, 0, iw2, ih2,
 116                 this);
 117         g2.drawImage(img,
 118                 x, 0, w, y,
 119                 iw2, 0, iw, ih2,
 120                 this);
 121         g2.drawImage(img,
 122                 0, y, x, h,
 123                 0, ih2, iw2, ih,
 124                 this);
 125         g2.drawImage(img,
 126                 x, y, w, h,
 127                 iw2, ih2, iw, ih,
 128                 this);
 129     }
 130 
 131     public static void main(String argv[]) {
 132         createDemoFrame(new WarpImage());
 133     }
 134 }