1 /*
   2  * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.  Oracle designates this
   8  * particular file as subject to the "Classpath" exception as provided
   9  * by Oracle in the LICENSE file that accompanied this code.
  10  *
  11  * This code is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14  * version 2 for more details (a copy is included in the LICENSE file that
  15  * accompanied this code).
  16  *
  17  * You should have received a copy of the GNU General Public License version
  18  * 2 along with this work; if not, write to the Free Software Foundation,
  19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20  *
  21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22  * or visit www.oracle.com if you need additional information or have any
  23  * questions.
  24  */
  25 
  26 package sun.java2d.xr;
  27 
  28 import java.awt.GraphicsConfiguration;
  29 import java.awt.ImageCapabilities;
  30 import java.awt.image.ColorModel;
  31 import sun.awt.image.SunVolatileImage;
  32 import sun.awt.image.VolatileSurfaceManager;
  33 import sun.java2d.SurfaceData;
  34 
  35 /**
  36  * XRender platform implementation of the VolatileSurfaceManager class.
  37  */
  38 public class XRVolatileSurfaceManager extends VolatileSurfaceManager {
  39 
  40     public XRVolatileSurfaceManager(SunVolatileImage vImg, Object context) {
  41         super(vImg, context);
  42     }
  43 
  44     protected boolean isAccelerationEnabled() {
  45         return true;
  46     }
  47 
  48     /**
  49      * Create a pixmap-based SurfaceData object
  50      */
  51     protected SurfaceData initAcceleratedSurface() {
  52         SurfaceData sData;
  53 
  54         try {
  55             XRGraphicsConfig gc = (XRGraphicsConfig) vImg.getGraphicsConfig();
  56             ColorModel cm = gc.getColorModel();
  57             long drawable = 0;
  58             if (context instanceof Long) {
  59                 drawable = ((Long)context).longValue();
  60             }
  61             sData = XRSurfaceData.createData(gc,
  62                                               vImg.getWidth(),
  63                                               vImg.getHeight(),
  64                                               cm, vImg, drawable,
  65                                               vImg.getTransparency());
  66         } catch (NullPointerException ex) {
  67             sData = null;
  68         } catch (OutOfMemoryError er) {
  69             sData = null;
  70         }
  71 
  72         return sData;
  73     }
  74 
  75    /**
  76     * XRender should allow copies between different formats and depths.
  77     * TODO: verify that this assumption is correct.
  78     */
  79     protected boolean isConfigValid(GraphicsConfiguration gc) {
  80         return true;
  81     }
  82 
  83     /**
  84      * Need to override the default behavior because Pixmaps-based
  85      * images are accelerated but not volatile.
  86      */
  87     @Override
  88     public ImageCapabilities getCapabilities(GraphicsConfiguration gc) {
  89         if (isConfigValid(gc) && isAccelerationEnabled()) {
  90             return new ImageCapabilities(true);
  91         }
  92         return new ImageCapabilities(false);
  93     }
  94 }