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95 lines
2.3 KiB
C++
95 lines
2.3 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* $URL$
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* $Id$
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*
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*/
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/*
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* This code is based on Broken Sword 2.5 engine
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*
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* Copyright (c) Malte Thiesen, Daniel Queteschiner and Michael Elsdoerfer
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*
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* Licensed under GNU GPL v2
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*
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*/
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#ifndef SWORD25_FRAMECOUNTER_H
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#define SWORD25_FRAMECOUNTER_H
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// Includes
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#include "sword25/kernel/common.h"
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#include "sword25/kernel/bs_stdint.h"
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namespace Sword25 {
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/**
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* A simple class that implements a frame counter
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*/
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class Framecounter {
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private:
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enum {
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DEFAULT_UPDATE_FREQUENCY = 10
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};
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public:
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/**
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* Creates a new BS_Framecounter object
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* @param UpdateFrequency Specifies how often the frame counter should be updated in a sceond.
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* The default value is 10.
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*/
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Framecounter(int UpdateFrequency = DEFAULT_UPDATE_FREQUENCY);
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/**
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* Determines how often the frame counter should be updated in a second.
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* @param UpdateFrequency Specifies how often the frame counter should be updated in a second.
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*/
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inline void SetUpdateFrequency(int UpdateFrequency);
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/**
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* This method must be called once per frame.
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*/
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void Update();
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/**
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* Returns the current FPS value.
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*/
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int GetFPS() const {
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return m_FPS;
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}
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private:
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int m_FPS;
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int m_FPSCount;
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int64_t m_LastUpdateTime;
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uint64_t m_UpdateDelay;
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};
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// Inlines
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void Framecounter::SetUpdateFrequency(int UpdateFrequency) {
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// Frequency in time (converted to microseconds)
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m_UpdateDelay = 1000000 / UpdateFrequency;
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}
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} // End of namespace Sword25
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#endif
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