/sources/engine/src/ogfpscounter.cpp

/*
 * OrangeGrass
 * Copyright (C) 2009 Vyacheslav Bogdanov.
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License version 3
 * as published by the Free Software Foundation.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program.  If not, see
 * <http://www.gnu.org/licenses/lgpl-3.0-standalone.html>.
 */

#ifdef WIN32

#include <windows.h>

#endif

#include "ogfpscounter.h"





COGFPSCounter::COGFPSCounter()

{

#ifdef WIN32

    QueryPerformanceCounter (&framedelay);

    QueryPerformanceFrequency (&tickspersecond);

#endif

}





COGFPSCounter::~COGFPSCounter()

{

}





// updating FPS COUNTER

void COGFPSCounter::Update ()

{

#ifdef WIN32

    QueryPerformanceCounter (&currentticks);

    speedfactor = (float)(currentticks.QuadPart - framedelay.QuadPart) / ((float)tickspersecond.QuadPart );

    fps = 1 / speedfactor;

    if (speedfactor <= 0) 

        speedfactor = 1;

    framedelay = currentticks;

#endif

}