1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
|
/*
* Copyright (c) 2003 Sun Microsystems, Inc. All Rights Reserved.
* Copyright (c) 2010 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistribution of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistribution in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* Neither the name of Sun Microsystems, Inc. or the names of
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES,
* INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
* PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN
* MICROSYSTEMS, INC. ("SUN") AND ITS LICENSORS SHALL NOT BE LIABLE FOR
* ANY DAMAGES SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR
* DISTRIBUTING THIS SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL SUN OR
* ITS LICENSORS BE LIABLE FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR
* DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE
* DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY,
* ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE, EVEN IF
* SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
*
* You acknowledge that this software is not designed or intended for use
* in the design, construction, operation or maintenance of any nuclear
* facility.
*
* Sun gratefully acknowledges that this software was originally authored
* and developed by Kenneth Bradley Russell and Christopher John Kline.
*/
package com.jogamp.opengl.util;
import java.util.*;
import javax.media.opengl.*;
/** An Animator subclass which attempts to achieve a target
frames-per-second rate to avoid using all CPU time. The target FPS
is only an estimate and is not guaranteed. */
public class FPSAnimator extends AnimatorBase {
private Timer timer = null;
private TimerTask task = null;
private int fps;
private boolean scheduleAtFixedRate;
private volatile boolean shouldRun;
protected String getBaseName(String prefix) {
return "FPS" + prefix + "Animator" ;
}
/** Creates an FPSAnimator with a given target frames-per-second
value. Equivalent to <code>FPSAnimator(null, fps)</code>. */
public FPSAnimator(int fps) {
this(null, fps);
}
/** Creates an FPSAnimator with a given target frames-per-second
value and a flag indicating whether to use fixed-rate
scheduling. Equivalent to <code>FPSAnimator(null, fps,
scheduleAtFixedRate)</code>. */
public FPSAnimator(int fps, boolean scheduleAtFixedRate) {
this(null, fps, scheduleAtFixedRate);
}
/** Creates an FPSAnimator with a given target frames-per-second
value and an initial drawable to animate. Equivalent to
<code>FPSAnimator(null, fps, false)</code>. */
public FPSAnimator(GLAutoDrawable drawable, int fps) {
this(drawable, fps, false);
}
/** Creates an FPSAnimator with a given target frames-per-second
value, an initial drawable to animate, and a flag indicating
whether to use fixed-rate scheduling. */
public FPSAnimator(GLAutoDrawable drawable, int fps, boolean scheduleAtFixedRate) {
this.fps = fps;
if (drawable != null) {
add(drawable);
}
this.scheduleAtFixedRate = scheduleAtFixedRate;
}
public long getStartTime() { return startTime; }
public long getCurrentTime() { return curTime; }
public long getDuration() { return curTime-startTime; }
public int getTotalFrames() { return totalFrames; }
public final synchronized boolean isStarted() {
return (timer != null);
}
public final synchronized boolean isAnimating() {
return (timer != null) && (task != null);
}
public final synchronized boolean isPaused() {
return (timer != null) && (task == null);
}
private void startTask() {
long delay = (long) (1000.0f / (float) fps);
task = new TimerTask() {
public void run() {
if(FPSAnimator.this.shouldRun) {
FPSAnimator.this.thread = Thread.currentThread();
display();
}
}
};
startTime = System.currentTimeMillis();
curTime = startTime;
totalFrames = 0;
shouldRun = true;
if (scheduleAtFixedRate) {
timer.scheduleAtFixedRate(task, 0, delay);
} else {
timer.schedule(task, 0, delay);
}
}
public synchronized void start() {
if (timer != null) {
throw new GLException("Already started");
}
timer = new Timer();
startTask();
}
/** Stops this FPSAnimator. Due to the implementation of the
FPSAnimator it is not guaranteed that the FPSAnimator will be
completely stopped by the time this method returns. */
public synchronized void stop() {
if (timer == null) {
throw new GLException("Already stopped");
}
shouldRun = false;
task.cancel();
task = null;
timer.cancel();
timer = null;
thread = null;
}
public synchronized void pause() {
if (timer == null) {
throw new GLException("Not running");
}
shouldRun = false;
task.cancel();
task = null;
thread = null;
}
public synchronized void resume() {
if (timer == null) {
throw new GLException("Not running");
}
startTask();
}
protected final boolean getShouldPause() {
return (timer != null) && (task == null);
}
protected final boolean getShouldStop() {
return (timer == null);
}
}
|
