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

   1 /*******************************************************************************\r
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
   3  * in Industry THTH ry.\r
   4  * All rights reserved. This program and the accompanying materials\r
   5  * are made available under the terms of the Eclipse Public License v1.0\r
   6  * which accompanies this distribution, and is available at\r
   7  * http://www.eclipse.org/legal/epl-v10.html\r
   8  *\r
   9  * Contributors:\r
  10  *     VTT Technical Research Centre of Finland - initial API and implementation\r
  11  *******************************************************************************/\r
  12 package org.simantics.g2d.image.impl;\r
  13 \r
  14 import java.awt.geom.AffineTransform;\r
  15 import java.util.EnumSet;\r
  16 \r
  17 import org.simantics.g2d.image.Image;\r
  18 import org.simantics.g2d.image.ImageUtils;\r
  19 import org.simantics.scenegraph.Node;\r
  20 import org.simantics.scenegraph.g2d.G2DParentNode;\r
  21 \r
  22 /**\r
  23  * System-memory stored raster of an image.\r
  24  * Suitable for vector based images.\r
  25  * <p>\r
  26  * This implementation determines the required raster quality from the\r
  27  * given graphics2D context. If the buffered raster is not good enough quality,\r
  28  * the image will be re-rendered. If the buffer to be rendered is larger than\r
  29  * maxDimension * maxDimension, original image will be used instead.\r
  30  * <p>\r
  31  * Disposing buffer does not dipose the original image.\r
  32  * \r
  33  * @See {@link ImageUtils}\r
  34  * @author Toni Kalajainen\r
  35  */\r
  36 public class BufferedImage extends ImageProxy implements Image {\r
  37 \r
  38     public static final double MAX_DIMENSION = 800;\r
  39 \r
  40     java.awt.image.BufferedImage raster;\r
  41     double rasterResolution = 1.0;\r
  42     double maxDimension;\r
  43     EnumSet<Feature> caps;\r
  44 \r
  45     public BufferedImage(Image source)\r
  46     {\r
  47         this(source, MAX_DIMENSION);\r
  48     }\r
  49 \r
  50     public BufferedImage(Image source, double maxDimension)\r
  51     {\r
  52         super(source);\r
  53         this.maxDimension = maxDimension;\r
  54         boolean vector = source.getFeatures().contains(Feature.Vector);\r
  55         boolean vola = source.getFeatures().contains(Feature.Volatile);\r
  56         if (vola) {\r
  57             source.addImageListener(new ImageListener() {\r
  58                 @Override\r
  59                 public void onContentChangedNotification(Image image) {\r
  60                     releaseRaster();\r
  61                 }});\r
  62             this.caps = EnumSet.of(Feature.Volatile);\r
  63         } else {\r
  64             this.caps = EnumSet.noneOf(Feature.class);\r
  65         }\r
  66     }\r
  67 \r
  68     private double requiredResolution(AffineTransform af)\r
  69     {\r
  70         double reso = Math.max(af.getScaleX(), af.getScaleY());\r
  71         // Add some extra information for rotations & anti-aliasing\r
  72         reso *= 1.3;\r
  73         return reso;\r
  74     }\r
  75 \r
  76     private synchronized void releaseRaster()\r
  77     {\r
  78         raster = null;\r
  79     }\r
  80 \r
  81     @Override\r
  82     public synchronized Node init(G2DParentNode parent) {\r
  83         return null;\r
  84 //              Graphics2D g = gc.getGraphics2D();\r
  85 //              // Quality rendering requested, do not render from cache\r
  86 //              if (g.getRenderingHint(RenderingHints.KEY_RENDERING) == RenderingHints.VALUE_RENDER_QUALITY)\r
  87 //              {\r
  88 //                      source.paint(gc);\r
  89 //                      return;\r
  90 //              }\r
  91 //              Rectangle2D bounds = getBounds();\r
  92 //\r
  93 //              double requiredResolution = requiredResolution(g.getTransform());\r
  94 //              double wid = bounds.getWidth();\r
  95 //              double hei = bounds.getHeight();\r
  96 //              wid *= requiredResolution * 1.05;\r
  97 //              hei *= requiredResolution * 1.05;\r
  98 //\r
  99 //              // too detailed, render with the original image\r
 100 //              if (wid*hei > maxDimension*maxDimension)\r
 101 //              {\r
 102 //                      source.paint(gc);\r
 103 //                      return;\r
 104 //              }\r
 105 //\r
 106 //              if (raster!=null && requiredResolution>rasterResolution )\r
 107 //              {\r
 108 //                      releaseRaster();\r
 109 //              }\r
 110 //              if (raster==null) {\r
 111 //\r
 112 //                      rasterResolution = requiredResolution;\r
 113 //\r
 114 //                      raster = new java.awt.image.BufferedImage(\r
 115 //                                      (int)(wid+1),\r
 116 //                                      (int)(hei+1),\r
 117 //                                      java.awt.image.BufferedImage.TYPE_INT_ARGB);\r
 118 //                      Graphics2D target = raster.createGraphics();\r
 119 //                      target.setBackground(new Color(255,255,255,0));\r
 120 //                      target.clearRect(0, 0, raster.getWidth(), raster.getHeight());\r
 121 //                      target.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);\r
 122 //                      target.scale(rasterResolution, rasterResolution);\r
 123 //                      target.translate(-bounds.getX(), -bounds.getY());\r
 124 //\r
 125 //                      QualityHints.HIGH_QUALITY_HINTS.setQuality(target);\r
 126 //                      target.setRenderingHint( RenderingHintsKeyExt.KEY_BUFFERED_IMAGE, new WeakReference<java.awt.image.BufferedImage>(raster) );\r
 127 //\r
 128 //                      source.paint(new GraphicsContextImpl(new Rectangle2D.Double(0,0, raster.getWidth(), raster.getHeight()), null)  );\r
 129 //                      target.dispose();\r
 130 //              }\r
 131 //\r
 132 //              AffineTransform af = g.getTransform();\r
 133 //              try {\r
 134 //                      g.translate(bounds.getX(), bounds.getY());\r
 135 //                      g.scale(1/rasterResolution, 1/rasterResolution);\r
 136 //                      g.drawImage(raster, 0, 0, null);\r
 137 //                      g.setColor(Color.BLACK);\r
 138 //              } finally {\r
 139 //                      g.setTransform(af);\r
 140 //              }\r
 141     }\r
 142 \r
 143     @Override\r
 144     public EnumSet<Feature> getFeatures() {\r
 145         return caps;\r
 146     }\r
 147 \r
 148 }\r
 149 \r