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FpsManager.cpp
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/*-----------------------------------------------------------------------------\
| ____ |
| __ / __ \ /\ /\ |
| /_/ / / \/ / / / / |
| __ ____ / /_ ____ ____ ____ / / / / |
| / / / __ \ / ___\ / __ \ / __ \ / __ \ / / / / /\ /\|
| / / / / \ \ / / / / \/ / / \ \ / ____/ / / / / / / / /|
| / /_ / / / / / / / / \ \__/ /_ \ \___ / /_ / /_ \ \/ / |
| \__/ \/ \/ \/ \/ \______/ \____/ \__/ \__/ \ / |
| / / |
| ______________________________________________________________________/ / |
|/ ____________________________________________________________________/ |
|\__/ |
| |
| |
| Infraelly MMORPG |
| Copyright (C) 2007-2010 Tony Huynh aka insanepotato |
| |
| Visit: http://sourceforge.net/projects/infraelly/ |
| |
| License: (LGPL) |
| This is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Library General Public |
| License as published by the Free Software Foundation; either |
| version 2 of the License, or (at your option) any later version. |
| |
| This 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 |
| Library General Public License for more details. |
| |
| You should have received a copy of the GNU Library General Public |
| License along with this library; if not, write to the Free |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| |
| Tony Huynh |
| |
L-----------------------------------------------------------------------------*/
// FpsManager.cpp
#include "FpsManager.hpp"
#include <string>
#include <sstream>
#include "fonts.hpp"
#include "colours.hpp"
//drawText()
#include "globalFunc.hpp"
FpsManager::FpsManager() :
frameStartTime(0),
capStartTime( SDL_GetTicks() ),
nowTime(0),
fps(0),
maxFps(-1),
framesDrawn(0)
{ }
FpsManager::FpsManager(int Fps) :
frameStartTime(0),
capStartTime( SDL_GetTicks() ),
nowTime(0),
fps(0),
maxFps(Fps),
framesDrawn(0)
{ }
FpsManager::~FpsManager(){}
int FpsManager::getFps()const{ return fps; }
int FpsManager::getMaxFps()const{ return maxFps; }
void FpsManager::setMaxFps(int newMaxFps){ maxFps = newMaxFps; }
void FpsManager::startFrame(){ frameStartTime = SDL_GetTicks(); }
void FpsManager::endFrame(){
//increment the number of frames drawn
++framesDrawn;
//get the time atm
nowTime = SDL_GetTicks();
//if nessesary, pause
if( maxFps > 0 ){
if ( nowTime-frameStartTime < 1000/maxFps ){
SDL_Delay( (1000/maxFps) - (nowTime-frameStartTime) );
}
}
//a second has passed, store fps and reset framesDrawn and start time
if ( nowTime-capStartTime >= 1000 ){
fps = framesDrawn;
framesDrawn = 0;
capStartTime = SDL_GetTicks();
}
}
void FpsManager::newFrame(){ endFrame(); startFrame(); }
//draws Fps to "screen" at "xy"
void FpsManager::draw(SDL_Surface *dest, int x, int y){
std::ostringstream fpsText;
fpsText << fps;
drawText(fpsText.str(), font::mainFont.at(14), colour::white, dest, x, y );
drawText(fpsText.str(), font::mainFont.at(14), colour::red, dest, ++x, ++y );
}