bundles/org.simantics.scenegraph/src/org/simantics/scenegraph/utils/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.scenegraph.utils;\r
  13 \r
  14 import java.awt.Color;\r
  15 import java.awt.Graphics2D;\r
  16 import java.awt.Point;\r
  17 import java.awt.RenderingHints;\r
  18 import java.awt.geom.AffineTransform;\r
  19 import java.awt.geom.Rectangle2D;\r
  20 \r
  21 import com.kitfox.svg.SVGDiagram;\r
  22 import com.kitfox.svg.SVGException;\r
  23 \r
  24 /**\r
  25  * @author J-P Laine\r
  26  */\r
  27 public class BufferedImage  {\r
  28     SVGDiagram                 source;\r
  29     Rectangle2D                imageBounds;\r
  30     Point                      referenceSize;\r
  31 \r
  32     java.awt.image.BufferedImage   buffer = null;\r
  33     AffineTransform previousTransform = null;\r
  34 \r
  35     /**\r
  36      * @param original\r
  37      * @param imageBounds\r
  38      * @param referenceSize a reference size for the rasterized images or\r
  39      *        <code>null</code> to not specify one in which case a default\r
  40      *        resolution is used\r
  41      */\r
  42     public BufferedImage(SVGDiagram original, Rectangle2D imageBounds, Point referenceSize) {\r
  43         this.source = original;\r
  44         this.imageBounds = imageBounds;\r
  45         this.referenceSize = referenceSize;\r
  46     }\r
  47 \r
  48     public BufferedImage(SVGDiagram original) {\r
  49         this.source = original;\r
  50         this.imageBounds = original.getViewRect();\r
  51         this.referenceSize = null;\r
  52     }\r
  53 \r
  54     public java.awt.image.BufferedImage getBuffer() {\r
  55         return buffer;\r
  56     }\r
  57     \r
  58     @Override\r
  59     public void finalize() throws Throwable {\r
  60         //System.out.println("BufferedImage.finalize()");\r
  61         releaseRaster();\r
  62         super.finalize();\r
  63     }\r
  64 \r
  65     public synchronized void releaseRaster() {\r
  66         source = null;\r
  67         if (buffer != null) {\r
  68             buffer.flush();\r
  69             buffer = null;\r
  70         }\r
  71     }\r
  72 \r
  73     public void paintToBuffer(AffineTransform transform, float margin) throws SVGException {\r
  74 \r
  75         int w = (int)((imageBounds.getWidth()+margin*2) * transform.getScaleX());\r
  76         int h = (int)((imageBounds.getHeight()+margin*2) * transform.getScaleY());\r
  77         if(w < 1) w = 1;\r
  78         if(h < 1) h = 1; // FIXME\r
  79         \r
  80         buffer = new java.awt.image.BufferedImage(w, h, java.awt.image.BufferedImage.TYPE_INT_ARGB);\r
  81         \r
  82         Graphics2D b2g = (Graphics2D)buffer.getGraphics();\r
  83 \r
  84         b2g.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_SPEED);\r
  85         b2g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);\r
  86         b2g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BILINEAR);\r
  87 \r
  88         b2g.setBackground(Color.WHITE);\r
  89         b2g.clearRect(0, 0, w, h);\r
  90         b2g.translate(margin, margin);\r
  91         b2g.scale(transform.getScaleX(), transform.getScaleY());\r
  92         b2g.translate(-imageBounds.getMinX(), -imageBounds.getMinY());\r
  93         source.render(b2g);\r
  94 \r
  95     }\r
  96     \r
  97     public void paint(Graphics2D g) {\r
  98         float margin = 5;\r
  99 \r
 100         if(previousTransform == null || previousTransform.getScaleX() != g.getTransform().getScaleX() || previousTransform.getScaleY() != g.getTransform().getScaleY()) {\r
 101 //              setupSourceRender(g);\r
 102             try {\r
 103                 previousTransform = (AffineTransform)g.getTransform().clone();\r
 104                 paintToBuffer(previousTransform, margin);\r
 105             } catch (SVGException e) {\r
 106                 // TODO Auto-generated catch block\r
 107                 e.printStackTrace();\r
 108             }\r
 109         }\r
 110 \r
 111         g.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_SPEED);\r
 112         g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_OFF);\r
 113         g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_OFF);\r
 114         g.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_NEAREST_NEIGHBOR);\r
 115 \r
 116         AffineTransform at = (AffineTransform)g.getTransform().clone();\r
 117         try {\r
 118             g.translate(imageBounds.getMinX(), imageBounds.getMinY());\r
 119             g.scale(1/previousTransform.getScaleX(), 1/previousTransform.getScaleY());\r
 120             g.translate(-margin, -margin);\r
 121 \r
 122             g.drawImage(buffer, 0, 0, null);\r
 123         } finally {\r
 124             g.setTransform(at);\r
 125         }\r
 126     }\r
 127 }\r