sigonasr2/RabiClone
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Restrict FPS to prevent CPU overloads

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Co-authored-by: r3cp3ct <45179536+r3cp3ct@users.noreply.github.com>
This commit is contained in:
sigonasr2 2022-05-23 05:55:22 -05:00
parent 411ef49a14
commit 871db21d15
1 changed files with 29 additions and 10 deletions
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39
src/sig/engine/Panel.java
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@ -31,8 +31,9 @@ public class Panel extends JPanel implements Runnable,ComponentListener {
double y_offset=0;
int frameCount=0;
long lastSecond=0;
int lastFrameCount=0;
boolean resizing=false;
long lastUpdate=System.nanoTime();
final long TARGET_FRAMETIME = 8333333l;
public Panel(JFrame f) {
super(true);
@ -78,14 +79,6 @@ public class Panel extends JPanel implements Runnable,ComponentListener {
mImageProducer.newPixels();
// draw it on panel
g.drawImage(this.imageBuffer, 0, 0, this);
if (window!=null&&System.currentTimeMillis()-lastSecond>=1000) {
window.setTitle(RabiClone.PROGRAM_NAME+" - FPS: "+(frameCount-lastFrameCount));
lastFrameCount=frameCount;
lastSecond=System.currentTimeMillis();
}
frameCount++;
}
/**
@ -305,10 +298,36 @@ public class Panel extends JPanel implements Runnable,ComponentListener {
// request a JPanel re-drawing
repaint();
//System.out.println("Repaint "+frameCount++);
//try {Thread.sleep(1);} catch (InterruptedException e) {}
waitForNextFrame();
}
}
private void waitForNextFrame() {
long newTime = System.nanoTime();
if (newTime-lastUpdate<TARGET_FRAMETIME) {
long timeRemaining=TARGET_FRAMETIME-(newTime-lastUpdate);
long millis = timeRemaining/1000000l;
int nanos = (int)(timeRemaining-millis*1000000l);
//System.out.println(timeRemaining+"/"+millis+" Nanos:"+nanos);
try {
Thread.sleep(millis,nanos);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
lastUpdate=newTime;
updateFPSCounter();
}
private void updateFPSCounter() {
if (window!=null&&System.currentTimeMillis()-lastSecond>=1000) {
window.setTitle(RabiClone.PROGRAM_NAME+" - FPS: "+(frameCount));
frameCount=0;
lastSecond=System.currentTimeMillis();
}
frameCount++;
}
@Override
public void componentHidden(ComponentEvent e) {
// TODO Auto-generated method stub