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