001/* ImageCapabilities.java -- the capabilities of an image buffer
002   Copyright (C) 2002, 2005 Free Software Foundation, Inc.
003
004This file is part of GNU Classpath.
005
006GNU Classpath is free software; you can redistribute it and/or modify
007it under the terms of the GNU General Public License as published by
008the Free Software Foundation; either version 2, or (at your option)
009any later version.
010
011GNU Classpath is distributed in the hope that it will be useful, but
012WITHOUT ANY WARRANTY; without even the implied warranty of
013MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
014General Public License for more details.
015
016You should have received a copy of the GNU General Public License
017along with GNU Classpath; see the file COPYING.  If not, write to the
018Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
01902110-1301 USA.
020
021Linking this library statically or dynamically with other modules is
022making a combined work based on this library.  Thus, the terms and
023conditions of the GNU General Public License cover the whole
024combination.
025
026As a special exception, the copyright holders of this library give you
027permission to link this library with independent modules to produce an
028executable, regardless of the license terms of these independent
029modules, and to copy and distribute the resulting executable under
030terms of your choice, provided that you also meet, for each linked
031independent module, the terms and conditions of the license of that
032module.  An independent module is a module which is not derived from
033or based on this library.  If you modify this library, you may extend
034this exception to your version of the library, but you are not
035obligated to do so.  If you do not wish to do so, delete this
036exception statement from your version. */
037
038
039package 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 */
047public 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}