Copy irrlichtmt to <root>/irr/

irr/src/CFPSCounter.cpp

@@ -0,0 +1,66 @@
+// Copyright (C) 2002-2012 Nikolaus Gebhardt
+// This file is part of the "Irrlicht Engine".
+// For conditions of distribution and use, see copyright notice in irrlicht.h
+
+#include "CFPSCounter.h"
+#include "irrMath.h"
+
+namespace irr
+{
+namespace video
+{
+
+CFPSCounter::CFPSCounter() :
+		FPS(60), Primitive(0), StartTime(0), FramesCounted(0),
+		PrimitivesCounted(0), PrimitiveAverage(0), PrimitiveTotal(0)
+{
+}
+
+//! returns current fps
+s32 CFPSCounter::getFPS() const
+{
+	return FPS;
+}
+
+//! returns current primitive count
+u32 CFPSCounter::getPrimitive() const
+{
+	return Primitive;
+}
+
+//! returns average primitive count of last period
+u32 CFPSCounter::getPrimitiveAverage() const
+{
+	return PrimitiveAverage;
+}
+
+//! returns accumulated primitive count since start
+u32 CFPSCounter::getPrimitiveTotal() const
+{
+	return PrimitiveTotal;
+}
+
+//! to be called every frame
+void CFPSCounter::registerFrame(u32 now, u32 primitivesDrawn)
+{
+	++FramesCounted;
+	PrimitiveTotal += primitivesDrawn;
+	PrimitivesCounted += primitivesDrawn;
+	Primitive = primitivesDrawn;
+
+	const u32 milliseconds = now - StartTime;
+
+	if (milliseconds >= 1500) {
+		const f32 invMilli = core::reciprocal((f32)milliseconds);
+
+		FPS = core::ceil32((1000 * FramesCounted) * invMilli);
+		PrimitiveAverage = core::ceil32((1000 * PrimitivesCounted) * invMilli);
+
+		FramesCounted = 0;
+		PrimitivesCounted = 0;
+		StartTime = now;
+	}
+}
+
+} // end namespace video
+} // end namespace irr