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Properly limit FPS to 30/60/120.

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This commit is contained in:
UnknownShadow200 2016-01-11 17:42:54 +11:00
parent ac33a869af
commit dadaf54c29
2 changed files with 17 additions and 19 deletions
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1
ClassicalSharp/ClassicalSharp.csproj
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@ -66,7 +66,6 @@
<DefineConstants>TRACE;USE_DX</DefineConstants>
<BaseIntermediateOutputPath>obj\</BaseIntermediateOutputPath>
<StartAction>Project</StartAction>
<StartArguments>wwwf ver 127.0.0.1 25565</StartArguments>
</PropertyGroup>
<Import Project="$(MSBuildBinPath)\Microsoft.CSharp.Targets" />
<ItemGroup>

35
ClassicalSharp/Game/Game.cs
View File

@ -1,4 +1,5 @@
using System;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.Net;
@ -177,8 +178,11 @@ namespace ClassicalSharp {
get { return activeScreen == null ? hudScreen : activeScreen; }
}
Stopwatch frameTimer = new Stopwatch();
protected override void OnRenderFrame( FrameEventArgs e ) {
PerformFpsElapsed( e.Time * 1000 );
frameTimer.Reset();
frameTimer.Start();
Graphics.BeginFrame( this );
Graphics.BindIb( defaultIb );
accumulator += e.Time;
@ -237,6 +241,7 @@ namespace ClassicalSharp {
if( screenshotRequested )
TakeScreenshot();
Graphics.EndFrame( this );
LimitFPS();
}
const int ticksFrequency = 20;
@ -386,32 +391,26 @@ namespace ClassicalSharp {
}
float limitMilliseconds;
double limitAcc;
public void SetFpsLimitMethod( FpsLimitMethod method ) {
FpsLimit = method;
limitAcc = 0;
limitMilliseconds = 0;
Graphics.SetVSync( this,
method == FpsLimitMethod.LimitVSync );
Graphics.SetVSync( this, method == FpsLimitMethod.LimitVSync );
if( method == FpsLimitMethod.Limit120FPS )
limitMilliseconds = 1000f / 60;
limitMilliseconds = 1000f / 120;
if( method == FpsLimitMethod.Limit60FPS )
limitMilliseconds = 1000f / 30;
limitMilliseconds = 1000f / 60;
if( method == FpsLimitMethod.Limit30FPS )
limitMilliseconds = 1000f / 15;
limitMilliseconds = 1000f / 30;
}
void PerformFpsElapsed( double elapsedMs ) {
limitAcc += elapsedMs;
if( limitAcc >= limitMilliseconds ) { // going slower than limit?
limitAcc -= limitMilliseconds;
} else { // going faster than limit
double sleepTime = limitMilliseconds - limitAcc;
sleepTime = Math.Ceiling( sleepTime );
Thread.Sleep( (int)sleepTime );
limitAcc = 0;
}
void LimitFPS() {
if( FpsLimit == FpsLimitMethod.LimitVSync ) return;
double elapsed = frameTimer.Elapsed.TotalMilliseconds;
double leftOver = limitMilliseconds - elapsed;
if( leftOver > 0.001 ) // going faster than limit
Thread.Sleep( (int)Math.Round( leftOver, MidpointRounding.AwayFromZero ) );
}
public bool IsKeyDown( Key key ) { return InputHandler.IsKeyDown( key ); }