001    /* ImageCapabilities.java -- the capabilities of an image buffer
002       Copyright (C) 2002, 2005 Free Software Foundation, Inc.
003    
004    This file is part of GNU Classpath.
005    
006    GNU Classpath is free software; you can redistribute it and/or modify
007    it under the terms of the GNU General Public License as published by
008    the Free Software Foundation; either version 2, or (at your option)
009    any later version.
010    
011    GNU Classpath is distributed in the hope that it will be useful, but
012    WITHOUT ANY WARRANTY; without even the implied warranty of
013    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014    General Public License for more details.
015    
016    You should have received a copy of the GNU General Public License
017    along with GNU Classpath; see the file COPYING.  If not, write to the
018    Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
019    02110-1301 USA.
020    
021    Linking this library statically or dynamically with other modules is
022    making a combined work based on this library.  Thus, the terms and
023    conditions of the GNU General Public License cover the whole
024    combination.
025    
026    As a special exception, the copyright holders of this library give you
027    permission to link this library with independent modules to produce an
028    executable, regardless of the license terms of these independent
029    modules, and to copy and distribute the resulting executable under
030    terms of your choice, provided that you also meet, for each linked
031    independent module, the terms and conditions of the license of that
032    module.  An independent module is a module which is not derived from
033    or based on this library.  If you modify this library, you may extend
034    this exception to your version of the library, but you are not
035    obligated to do so.  If you do not wish to do so, delete this
036    exception statement from your version. */
037    
038    
039    package java.awt;
040    
041    /**
042     * This class represents the capabilities of an image buffer.  An
043     * image buffer may be backed by accelerated graphics resources.
044     * Those resources may or may not be volatile.  This class is used to
045     * describe these image buffer characteristics.
046     */
047    public class ImageCapabilities implements Cloneable
048    {
049      /**
050       * Whether or not this the image buffer uses accelerated graphics
051       * resources.
052       */
053      private final boolean accelerated;
054    
055      /**
056       * Create a new image capability descriptor.
057       *
058       * @param accelerated true if the image buffer uses accelerated
059       * graphics resources
060       */
061      public ImageCapabilities(boolean accelerated)
062      {
063        this.accelerated = accelerated;
064      }
065    
066      /**
067       * Returns whether or not the image buffer uses accelerated graphics
068       * resources.
069       *
070       * @return true if the image buffer uses accelerated graphics
071       * resources; false otherwise
072       */
073      public boolean isAccelerated()
074      {
075        return accelerated;
076      }
077    
078      /**
079       * Returns whether or not the image buffer's resources are volatile,
080       * meaning that they can be reclaimed by the graphics system at any
081       * time.
082       *
083       * @return true if the image buffer's resources are volatile; false
084       * otherwise
085       */
086      public boolean isTrueVolatile()
087      {
088        return true;
089      }
090    
091      /**
092       * Clone this image capability descriptor.
093       *
094       * @return a clone of this image capability descriptor
095       */
096      public Object clone()
097      {
098        try
099          {
100            return super.clone();
101          }
102        catch (CloneNotSupportedException e)
103          {
104            throw (Error) new InternalError().initCause(e);
105          }
106      }
107    }