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/**
* Copyright 2011 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:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions 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.
*
* THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of JogAmp Community.
*/
package jogamp.opengl;
import java.io.PrintStream;
import java.util.concurrent.TimeUnit;
import javax.media.opengl.FPSCounter;
/**
* Default implementation of FPSCounter to be used for FPSCounter implementing renderer.
*/
public class FPSCounterImpl implements FPSCounter {
private int fpsUpdateFramesInterval;
private PrintStream fpsOutputStream ;
private long fpsStartTime, fpsLastUpdateTime, fpsLastPeriod, fpsTotalDuration;
private int fpsTotalFrames;
private float fpsLast, fpsTotal;
/** Creates a disabled instance */
public FPSCounterImpl() {
setUpdateFPSFrames(0, null);
}
/**
* Increases total frame count and updates values if feature is enabled and
* update interval is reached.<br>
*
* Shall be called by actual FPSCounter implementing renderer, after display a new frame.
*
*/
public final synchronized void tickFPS() {
fpsTotalFrames++;
if(fpsUpdateFramesInterval>0 && fpsTotalFrames%fpsUpdateFramesInterval == 0) {
final long now = TimeUnit.NANOSECONDS.toMillis(System.nanoTime());
fpsLastPeriod = now - fpsLastUpdateTime;
fpsLastPeriod = Math.max(fpsLastPeriod, 1); // div 0
fpsLast = ( fpsUpdateFramesInterval * 1000f ) / ( fpsLastPeriod ) ;
fpsTotalDuration = now - fpsStartTime;
fpsTotalDuration = Math.max(fpsTotalDuration, 1); // div 0
fpsTotal= ( fpsTotalFrames * 1000f ) / ( fpsTotalDuration ) ;
if(null != fpsOutputStream) {
fpsOutputStream.println(toString());
}
fpsLastUpdateTime = now;
}
}
public StringBuilder toString(StringBuilder sb) {
if(null==sb) {
sb = new StringBuilder();
}
String fpsLastS = String.valueOf(fpsLast);
fpsLastS = fpsLastS.substring(0, fpsLastS.indexOf('.') + 2);
String fpsTotalS = String.valueOf(fpsTotal);
fpsTotalS = fpsTotalS.substring(0, fpsTotalS.indexOf('.') + 2);
sb.append(fpsTotalDuration/1000 +" s: "+ fpsUpdateFramesInterval+" f / "+ fpsLastPeriod+" ms, " + fpsLastS+" fps, "+ fpsLastPeriod/fpsUpdateFramesInterval+" ms/f; "+
"total: "+ fpsTotalFrames+" f, "+ fpsTotalS+ " fps, "+ fpsTotalDuration/fpsTotalFrames+" ms/f");
return sb;
}
@Override
public String toString() {
return toString(null).toString();
}
@Override
public final synchronized void setUpdateFPSFrames(final int frames, final PrintStream out) {
fpsUpdateFramesInterval = frames;
fpsOutputStream = out;
resetFPSCounter();
}
@Override
public final synchronized void resetFPSCounter() {
fpsStartTime = TimeUnit.NANOSECONDS.toMillis(System.nanoTime()); // overwrite startTime to real init one
fpsLastUpdateTime = fpsStartTime;
fpsLastPeriod = 0;
fpsTotalFrames = 0;
fpsLast = 0f; fpsTotal = 0f;
fpsLastPeriod = 0; fpsTotalDuration=0;
}
@Override
public final synchronized int getUpdateFPSFrames() {
return fpsUpdateFramesInterval;
}
@Override
public final synchronized long getFPSStartTime() {
return fpsStartTime;
}
@Override
public final synchronized long getLastFPSUpdateTime() {
return fpsLastUpdateTime;
}
@Override
public final synchronized long getLastFPSPeriod() {
return fpsLastPeriod;
}
@Override
public final synchronized float getLastFPS() {
return fpsLast;
}
@Override
public final synchronized int getTotalFPSFrames() {
return fpsTotalFrames;
}
@Override
public final synchronized long getTotalFPSDuration() {
return fpsTotalDuration;
}
@Override
public final synchronized float getTotalFPS() {
return fpsTotal;
}
}
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