bundles/org.simantics.g2d/src/org/simantics/g2d/image/impl/VRamBufferedImage.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.Color;\r
  15 import java.awt.Graphics2D;\r
  16 import java.awt.GraphicsConfiguration;\r
  17 import java.awt.RenderingHints;\r
  18 import java.awt.Shape;\r
  19 import java.awt.Transparency;\r
  20 import java.awt.geom.Rectangle2D;\r
  21 import java.awt.image.VolatileImage;\r
  22 \r
  23 import org.simantics.g2d.image.Image;\r
  24 \r
  25 /**\r
  26  * Video-ram cache suitable for rasterized PaintableSymbols.\r
  27  * \r
  28  * @see VRamImage\r
  29  * @author Toni Kalajainen\r
  30  */\r
  31 public class VRamBufferedImage extends ImageProxy {\r
  32 \r
  33     Shape outline;\r
  34     final GraphicsConfiguration gc;\r
  35     VolatileImage image;\r
  36     int wid, hei;\r
  37 \r
  38     public VRamBufferedImage(Image original, GraphicsConfiguration gc) {\r
  39         super(original);\r
  40         assert(gc!=null);\r
  41         this.gc = gc;\r
  42         Rectangle2D bounds = original.getBounds();\r
  43         wid = (int) Math.ceil( bounds.getWidth() );\r
  44         hei = (int) Math.ceil( bounds.getHeight() );\r
  45     }\r
  46 \r
  47     synchronized VolatileImage restore()\r
  48     {\r
  49         if (image==null) {\r
  50             image = gc.createCompatibleVolatileImage(\r
  51                     wid, hei,\r
  52                     Transparency.TRANSLUCENT);\r
  53         }\r
  54         int validateResult = image.validate(gc);\r
  55         if (validateResult == VolatileImage.IMAGE_INCOMPATIBLE)\r
  56             return null;\r
  57 \r
  58         if (validateResult == VolatileImage.IMAGE_OK)\r
  59             return image;\r
  60 \r
  61         if (validateResult == VolatileImage.IMAGE_RESTORED /*raster.contentsLost()*/) {\r
  62             Rectangle2D bounds = source.getBounds();\r
  63             outline = source.getOutline();\r
  64             Graphics2D target = image.createGraphics();\r
  65             target.setBackground(new Color(255,255,255,0));\r
  66             target.clearRect(0, 0, image.getWidth(), image.getHeight());\r
  67             target.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);\r
  68             target.setRenderingHint(RenderingHints.KEY_INTERPOLATION, RenderingHints.VALUE_INTERPOLATION_BICUBIC);\r
  69             target.setRenderingHint(RenderingHints.KEY_ALPHA_INTERPOLATION, RenderingHints.VALUE_ALPHA_INTERPOLATION_QUALITY);\r
  70             target.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);\r
  71             target.translate(-bounds.getMinX(), -bounds.getMinY());\r
  72             source.init(null);//new GraphicsContextImpl(new Rectangle2D.Double(0,0, image.getWidth(), image.getHeight()), null) );\r
  73             target.dispose();\r
  74             return image;\r
  75         }\r
  76         return null;\r
  77     }\r
  78 \r
  79     @Override\r
  80     public int hashCode() {\r
  81         return gc.hashCode() ^source.hashCode();\r
  82     }\r
  83 \r
  84     @Override\r
  85     public boolean equals(Object obj) {\r
  86         if (!(obj instanceof VRamBufferedImage)) return false;\r
  87         VRamBufferedImage o = (VRamBufferedImage) obj;\r
  88         return o.gc == gc && o.source.equals(source);\r
  89     }\r
  90 \r
  91     public Image getSource() {\r
  92         return source;\r
  93     }\r
  94 \r
  95     public GraphicsConfiguration getGraphicsConfiguration() {\r
  96         return gc;\r
  97     }\r
  98 \r
  99 }\r