Don't sleep in FramerateManager::framerateDelay() if VSync is enabled

client/gui/FramerateManager.cpp

@@ -11,22 +11,28 @@
 #include "StdInc.h"
 #include "FramerateManager.h"
 
+#include "../../lib/CConfigHandler.h"
+
 FramerateManager::FramerateManager(int targetFrameRate)
 	: targetFrameTime(Duration(boost::chrono::seconds(1)) / targetFrameRate)
 	, lastFrameIndex(0)
 	, lastFrameTimes({})
 	, lastTimePoint(Clock::now())
+	, vsyncEnabled(settings["video"]["vsync"].Bool())
 {
 	boost::range::fill(lastFrameTimes, targetFrameTime);
 }
 
 void FramerateManager::framerateDelay()
+{
+	if(!vsyncEnabled)
 	{
 		Duration timeSpentBusy = Clock::now() - lastTimePoint;
 
 		// FPS is higher than it should be, then wait some time
 		if(timeSpentBusy < targetFrameTime)
 			boost::this_thread::sleep_for(targetFrameTime - timeSpentBusy);
+	}
 
 	// compute actual timeElapsed taking into account actual sleep interval
 	// limit it to 100 ms to avoid breaking animation in case of huge lag (e.g. triggered breakpoint)

client/gui/FramerateManager.h

@@ -25,6 +25,8 @@ class FramerateManager
 	/// index of last measured frome in lastFrameTimes array
 	ui32 lastFrameIndex;
 
+	bool vsyncEnabled;
+
 public:
 	FramerateManager(int targetFramerate);