Source code: java/awt/ImageCapabilities.java
1 /* ImageCapabilities.java -- the capabilities of an image buffer
2 Copyright (C) 2002, 2005 Free Software Foundation, Inc.
3
4 This file is part of GNU Classpath.
5
6 GNU Classpath is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
9 any later version.
10
11 GNU Classpath is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
15
16 You should have received a copy of the GNU General Public License
17 along with GNU Classpath; see the file COPYING. If not, write to the
18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
19 02110-1301 USA.
20
21 Linking this library statically or dynamically with other modules is
22 making a combined work based on this library. Thus, the terms and
23 conditions of the GNU General Public License cover the whole
24 combination.
25
26 As a special exception, the copyright holders of this library give you
27 permission to link this library with independent modules to produce an
28 executable, regardless of the license terms of these independent
29 modules, and to copy and distribute the resulting executable under
30 terms of your choice, provided that you also meet, for each linked
31 independent module, the terms and conditions of the license of that
32 module. An independent module is a module which is not derived from
33 or based on this library. If you modify this library, you may extend
34 this exception to your version of the library, but you are not
35 obligated to do so. If you do not wish to do so, delete this
36 exception statement from your version. */
37
38
39 package java.awt;
40
41 /**
42 * This class represents the capabilities of an image buffer. An
43 * image buffer may be backed by accelerated graphics resources.
44 * Those resources may or may not be volatile. This class is used to
45 * describe these image buffer characteristics.
46 */
47 public class ImageCapabilities implements Cloneable
48 {
49 /**
50 * Whether or not this the image buffer uses accelerated graphics
51 * resources.
52 */
53 private final boolean accelerated;
54
55 /**
56 * Create a new image capability descriptor.
57 *
58 * @param accelerated true if the image buffer uses accelerated
59 * graphics resources
60 */
61 public ImageCapabilities(boolean accelerated)
62 {
63 this.accelerated = accelerated;
64 }
65
66 /**
67 * Returns whether or not the image buffer uses accelerated graphics
68 * resources.
69 *
70 * @return true if the image buffer uses accelerated graphics
71 * resources; false otherwise
72 */
73 public boolean isAccelerated()
74 {
75 return accelerated;
76 }
77
78 /**
79 * Returns whether or not the image buffer's resources are volatile,
80 * meaning that they can be reclaimed by the graphics system at any
81 * time.
82 *
83 * @return true if the image buffer's resources are volatile; false
84 * otherwise
85 */
86 public boolean isTrueVolatile()
87 {
88 return true;
89 }
90
91 /**
92 * Clone this image capability descriptor.
93 *
94 * @return a clone of this image capability descriptor
95 */
96 public Object clone()
97 {
98 try
99 {
100 return super.clone();
101 }
102 catch (CloneNotSupportedException e)
103 {
104 throw (Error) new InternalError().initCause(e);
105 }
106 }
107 }