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FPSManager.cs
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FPSManager.cs
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#region License Information (GPL v3)
/*
ShareX - A program that allows you to take screenshots and share any file type
Copyright (c) 2007-2024 ShareX Team
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
Optionally you can also view the license at <http://www.gnu.org/licenses/>.
*/
#endregion License Information (GPL v3)
using System;
using System.Diagnostics;
using System.Threading;
namespace ShareX.HelpersLib
{
public class FPSManager
{
public event Action FPSUpdated;
public int FPS { get; private set; }
public int FPSLimit { get; set; }
private int frameCount;
private Stopwatch fpsTimer, frameTimer;
public FPSManager()
{
fpsTimer = new Stopwatch();
frameTimer = new Stopwatch();
}
public FPSManager(int fpsLimit) : this()
{
FPSLimit = fpsLimit;
}
protected void OnFPSUpdated()
{
FPSUpdated?.Invoke();
}
public void Update()
{
frameCount++;
if (!fpsTimer.IsRunning)
{
fpsTimer.Start();
}
else if (fpsTimer.ElapsedMilliseconds >= 1000)
{
FPS = (int)Math.Round(frameCount / fpsTimer.Elapsed.TotalSeconds);
OnFPSUpdated();
frameCount = 0;
fpsTimer.Restart();
}
if (FPSLimit > 0)
{
if (!frameTimer.IsRunning)
{
frameTimer.Start();
}
else
{
double currentFrameDuration = frameTimer.Elapsed.TotalMilliseconds;
double targetFrameDuration = 1000d / FPSLimit;
if (currentFrameDuration < targetFrameDuration)
{
int sleepDuration = (int)Math.Round(targetFrameDuration - currentFrameDuration);
if (sleepDuration > 0)
{
Thread.Sleep(sleepDuration);
}
}
frameTimer.Restart();
}
}
}
}
}