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// 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
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