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 }