bundles/org.simantics.g2d/src/org/simantics/g2d/image/impl/BufferedImage.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.geom.AffineTransform;
  15 import java.util.EnumSet;
  16
  17 import org.simantics.g2d.image.Image;
  18 import org.simantics.g2d.image.ImageUtils;
  19 import org.simantics.scenegraph.Node;
  20 import org.simantics.scenegraph.g2d.G2DParentNode;
  21
  22 /**
  23  * System-memory stored raster of an image.
  24  * Suitable for vector based images.
  25  * <p>
  26  * This implementation determines the required raster quality from the
  27  * given graphics2D context. If the buffered raster is not good enough quality,
  28  * the image will be re-rendered. If the buffer to be rendered is larger than
  29  * maxDimension * maxDimension, original image will be used instead.
  30  * <p>
  31  * Disposing buffer does not dipose the original image.
  32  *
  33  * @See {@link ImageUtils}
  34  * @author Toni Kalajainen
  35  */
  36 public class BufferedImage extends ImageProxy implements Image {
  37
  38     public static final double MAX_DIMENSION = 800;
  39
  40     java.awt.image.BufferedImage raster;
  41     double rasterResolution = 1.0;
  42     double maxDimension;
  43     EnumSet<Feature> caps;
  44
  45     public BufferedImage(Image source)
  46     {
  47         this(source, MAX_DIMENSION);
  48     }
  49
  50     public BufferedImage(Image source, double maxDimension)
  51     {
  52         super(source);
  53         this.maxDimension = maxDimension;
  54         boolean vector = source.getFeatures().contains(Feature.Vector);
  55         boolean vola = source.getFeatures().contains(Feature.Volatile);
  56         if (vola) {
  57             source.addImageListener(new ImageListener() {
  58                 @Override
  59                 public void onContentChangedNotification(Image image) {
  60                     releaseRaster();
  61                 }});
  62             this.caps = EnumSet.of(Feature.Volatile);
  63         } else {
  64             this.caps = EnumSet.noneOf(Feature.class);
  65         }
  66     }
  67
  68     private double requiredResolution(AffineTransform af)
  69     {
  70         double reso = Math.max(af.getScaleX(), af.getScaleY());
  71         // Add some extra information for rotations & anti-aliasing
  72         reso *= 1.3;
  73         return reso;
  74     }
  75
  76     private synchronized void releaseRaster()
  77     {
  78         raster = null;
  79     }
  80
  81     @Override
  82     public synchronized Node init(G2DParentNode parent) {
  83         return null;
  84 //              Graphics2D g = gc.getGraphics2D();
  85 //              // Quality rendering requested, do not render from cache
  86 //              if (g.getRenderingHint(RenderingHints.KEY_RENDERING) == RenderingHints.VALUE_RENDER_QUALITY)
  87 //              {
  88 //                      source.paint(gc);
  89 //                      return;
  90 //              }
  91 //              Rectangle2D bounds = getBounds();
  92 //
  93 //              double requiredResolution = requiredResolution(g.getTransform());
  94 //              double wid = bounds.getWidth();
  95 //              double hei = bounds.getHeight();
  96 //              wid *= requiredResolution * 1.05;
  97 //              hei *= requiredResolution * 1.05;
  98 //
  99 //              // too detailed, render with the original image
 100 //              if (wid*hei > maxDimension*maxDimension)
 101 //              {
 102 //                      source.paint(gc);
 103 //                      return;
 104 //              }
 105 //
 106 //              if (raster!=null && requiredResolution>rasterResolution )
 107 //              {
 108 //                      releaseRaster();
 109 //              }
 110 //              if (raster==null) {
 111 //
 112 //                      rasterResolution = requiredResolution;
 113 //
 114 //                      raster = new java.awt.image.BufferedImage(
 115 //                                      (int)(wid+1),
 116 //                                      (int)(hei+1),
 117 //                                      java.awt.image.BufferedImage.TYPE_INT_ARGB);
 118 //                      Graphics2D target = raster.createGraphics();
 119 //                      target.setBackground(new Color(255,255,255,0));
 120 //                      target.clearRect(0, 0, raster.getWidth(), raster.getHeight());
 121 //                      target.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
 122 //                      target.scale(rasterResolution, rasterResolution);
 123 //                      target.translate(-bounds.getX(), -bounds.getY());
 124 //
 125 //                      QualityHints.HIGH_QUALITY_HINTS.setQuality(target);
 126 //                      target.setRenderingHint( RenderingHintsKeyExt.KEY_BUFFERED_IMAGE, new WeakReference<java.awt.image.BufferedImage>(raster) );
 127 //
 128 //                      source.paint(new GraphicsContextImpl(new Rectangle2D.Double(0,0, raster.getWidth(), raster.getHeight()), null)  );
 129 //                      target.dispose();
 130 //              }
 131 //
 132 //              AffineTransform af = g.getTransform();
 133 //              try {
 134 //                      g.translate(bounds.getX(), bounds.getY());
 135 //                      g.scale(1/rasterResolution, 1/rasterResolution);
 136 //                      g.drawImage(raster, 0, 0, null);
 137 //                      g.setColor(Color.BLACK);
 138 //              } finally {
 139 //                      g.setTransform(af);
 140 //              }
 141     }
 142
 143     @Override
 144     public EnumSet<Feature> getFeatures() {
 145         return caps;
 146     }
 147
 148 }
 149