bundles/org.simantics.g2d/src/org/simantics/g2d/image/impl/Shadow.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.g2d.image.impl;
  13
  14 import java.awt.AlphaComposite;
  15 import java.awt.Color;
  16 import java.awt.Graphics2D;
  17 import java.awt.geom.Point2D;
  18 import java.awt.geom.Rectangle2D;
  19 import java.awt.image.BufferedImage;
  20 import java.awt.image.ConvolveOp;
  21 import java.awt.image.Kernel;
  22 import java.util.Arrays;
  23 import java.util.EnumSet;
  24
  25 import org.simantics.g2d.image.Image;
  26 import org.simantics.scenegraph.Node;
  27 import org.simantics.scenegraph.g2d.G2DParentNode;
  28
  29 /**
  30  * Reflects to a shadow of a symbol.
  31  *
  32  * @author Toni Kalajainen
  33  */
  34 public class Shadow extends ImageProxy implements Image {
  35
  36     public static final ShadowParameters SHADOW = new ShadowParameters(0.5, Color.BLACK, 2);
  37     public static final class ShadowParameters {
  38         public final double alpha;
  39         public final Color color;
  40         public final int size;
  41         public ShadowParameters(double alpha, Color color, int size) {
  42             this.alpha = alpha;
  43             this.color = color;
  44             this.size = size;
  45         }
  46     }
  47
  48     public final ShadowParameters shadow;
  49     Point2D size;
  50     ConvolveOp horiz, vert;
  51     int shadowSizeX, shadowSizeY;
  52     EnumSet<Feature> feats;
  53     public ImageListener origListener;
  54
  55     /**
  56      *
  57      * @param source
  58      * @param shadow
  59      * @param shadowOnly
  60      */
  61     public Shadow(Image source, ShadowParameters shadow)
  62     {
  63         super(source);
  64         this.shadow = shadow;
  65         shadowSizeX = shadow.size;
  66         shadowSizeY = shadow.size;
  67         horiz           = createBlurOp(shadow.size, 1);
  68         vert            = createBlurOp(1, shadow.size);
  69         if (source.getFeatures().contains(Feature.Volatile)) {
  70             feats =     EnumSet.of(Feature.Volatile);
  71         } else
  72             feats = EnumSet.noneOf(Feature.class);
  73     }
  74
  75     public Shadow(Image source, ShadowParameters shadow, double width, double height)
  76     {
  77         this(source, shadow);
  78         this.size       = new Point2D.Double(width, height);
  79         shadowSizeX = (int) Math.round( shadow.size * width  / source.getBounds().getWidth()  );
  80         shadowSizeY = (int) Math.round( shadow.size * height / source.getBounds().getHeight() );
  81         if (shadowSizeX<1) shadowSizeX = 1;
  82         if (shadowSizeY<1) shadowSizeY = 1;
  83         horiz           = createBlurOp(shadowSizeX, 1);
  84         vert            = createBlurOp(1, shadowSizeY);
  85     }
  86
  87     @Override
  88     public Rectangle2D getBounds() {
  89         Rectangle2D rect = source.getBounds();
  90         return new Rectangle2D.Double(rect.getX() - shadowSizeX, rect.getY() - shadowSizeY, rect.getWidth() + shadowSizeX*2, rect.getHeight() + shadowSizeY*2);
  91     }
  92
  93     private BufferedImage createImage() {
  94         Rectangle2D origBounds = source.getBounds();
  95         double width =  size==null?origBounds.getWidth() :size.getX();
  96         double height = size==null?origBounds.getHeight():size.getY();
  97         BufferedImage subject = new BufferedImage(
  98                 (int)Math.ceil( width  + shadowSizeX * 2 ),
  99                 (int)Math.ceil( height + shadowSizeY * 2 ),
 100                 BufferedImage.TYPE_INT_ARGB);
 101
 102         Graphics2D g = subject.createGraphics();
 103         g.translate(shadowSizeX, shadowSizeY);
 104         if (size!=null)
 105             g.scale(size.getX()/origBounds.getWidth(), size.getY()/origBounds.getHeight());
 106         g.translate(-origBounds.getMinX(), -origBounds.getMinY());
 107
 108         Rectangle2D bounds = new Rectangle2D.Double(0, 0, subject.getWidth(), subject.getHeight());
 109 //        GraphicsContextImpl gc = new GraphicsContextImpl(bounds, null);
 110 //        try {
 111 //              source.paint(gc);
 112 //        } finally {
 113 //              gc.dispose();
 114 //        }
 115
 116         g.dispose();
 117         return subject;
 118     }
 119
 120     private BufferedImage createShadowMask(BufferedImage image) {
 121         BufferedImage mask = new BufferedImage(image.getWidth(),
 122                 image.getHeight(),
 123                 BufferedImage.TYPE_INT_ARGB);
 124
 125         Graphics2D g2d = mask.createGraphics();
 126         g2d.drawImage(image, 0, 0, null);
 127         g2d.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_IN,
 128                 (float)shadow.alpha));
 129         g2d.setColor(shadow.color);
 130         g2d.fillRect(0, 0, image.getWidth(), image.getHeight());
 131         g2d.dispose();
 132
 133         return mask;
 134     }
 135
 136     public BufferedImage createShadow() {
 137         BufferedImage i1 = createImage();
 138         BufferedImage i2 = new BufferedImage(i1.getWidth(), i1.getHeight(), BufferedImage.TYPE_INT_ARGB);
 139         BufferedImage shadowMask = createShadowMask(i1);
 140         horiz.filter(shadowMask, i2);
 141         vert.filter(i2, shadowMask);
 142         return shadowMask;
 143     }
 144
 145     private ConvolveOp createBlurOp(int width, int height) {
 146         float[] data = new float[width * height];
 147         float value = 1.0f / (width * height);
 148         Arrays.fill(data, value);
 149         return new ConvolveOp(new Kernel(width, height, data));
 150     }
 151
 152
 153     @Override
 154     public Node init(G2DParentNode parent) {
 155         return null;
 156 //              Graphics2D g = gc.getGraphics2D();
 157 //              BufferedImage bi = createShadow();
 158 //
 159 //      Rectangle2D origBounds = source.getBounds();
 160 //      if (size!=null) {
 161 //                      g.translate(origBounds.getMinX(), origBounds.getMinY());
 162 //                      g.scale(origBounds.getWidth()/size.getX(), origBounds.getHeight()/size.getY());
 163 //                      g.translate(-shadowSizeX, -shadowSizeY);
 164 //                      g.drawImage(bi, 0, 0, null);
 165 //                      g.translate(shadowSizeX, shadowSizeY);
 166 //                      g.scale(size.getX()/origBounds.getWidth(), size.getY()/origBounds.getHeight());
 167 //                      g.translate(-origBounds.getMinX(), -origBounds.getMinY());
 168 //              } else {
 169 //                      g.translate(-shadowSizeX, -shadowSizeY);
 170 //                      g.translate(origBounds.getMinX(), origBounds.getMinY());
 171 //                      g.drawImage(bi, 0, 0, null);
 172 //                      g.translate(shadowSizeX, shadowSizeY);
 173 //                      g.translate(-origBounds.getMinX(), -origBounds.getMinY());
 174 //              }
 175     }
 176
 177     @Override
 178     public EnumSet<Feature> getFeatures() {
 179         return feats;
 180     }
 181
 182
 183 }