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 }