/*
 * This source file is part of KEOS (Free 3D Engine)
 * For the latest info, see http://www.keosengine.org/
 * E-mails : thierry.vouriot@keosengine.org, yeri@keosengine.org
 * 
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * 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, write to the Free Software Foundation, Inc., 59 Temple
 * Place - Suite 330, Boston, MA 02111-1307, USA, or go to
 * http://www.gnu.org/copyleft/lesser.txt.
 *
 */

#include "KeosWin32Timer.h"

namespace Keos 
{
    //=======================================================================
    // CWin32Timer implementation
    //=======================================================================

    //-----------------------------------------------------------------------
    CWin32Timer::CWin32Timer()
    {

    }

    //-----------------------------------------------------------------------
    void CWin32Timer::Reset()
    {
        QueryPerformanceFrequency(&m_nFrequency);
        QueryPerformanceCounter(&m_nStartTime);
    }

    //-----------------------------------------------------------------------
    unsigned long CWin32Timer::GetMilliseconds()
    {
        LARGE_INTEGER curTime;
        LONGLONG newTicks;

        QueryPerformanceCounter(&curTime);

        newTicks = (curTime.QuadPart - m_nStartTime.QuadPart);
        // Scale by 1000 in order to get millisecond precision
        newTicks *= 1000;
        newTicks /= m_nFrequency.QuadPart;

        return (unsigned long)newTicks;
	  }

    //-----------------------------------------------------------------------
	unsigned long CWin32Timer::GetMicroseconds()
	{
		LARGE_INTEGER curTime;
		LONGLONG newTicks;

		QueryPerformanceCounter(&curTime);

		newTicks = (curTime.QuadPart - m_nStartTime.QuadPart);
		// Scale by 1000000 in order to get microsecond precision
		newTicks *= (Real)1000000.0/(Real)m_nFrequency.QuadPart;

		return (unsigned long)newTicks;
	}

} // namespace Keos
