FrameTimer.cpp

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////////////////////////////////////////////////////////////////////////////////
//    Scorched3D (c) 2000-2009
//
//    This file is part of Scorched3D.
//
//    Scorched3D is free software; you can redistribute it and/or modify
//    it under the terms of the GNU General Public License as published by
//    the Free Software Foundation; either version 2 of the License, or
//    (at your option) any later version.
//
//    Scorched3D 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 General Public License for more details.
//
//    You should have received a copy of the GNU General Public License
//    along with Scorched3D; if not, write to the Free Software
//    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
////////////////////////////////////////////////////////////////////////////////

#include <stdio.h>
#include <graph/FrameTimer.h>
#include <client/ClientChannelManager.h>
#include <graph/OptionsDisplay.h>
#include <GLEXT/GLInfo.h>
#include <GLEXT/GLTexture.h>
#include <lang/LangResource.h>

FrameTimer *FrameTimer::instance_ = 0;

FrameTimer *FrameTimer::instance()
{
        if (!instance_)
        {
                instance_ = new FrameTimer;
        }

        return instance_;
}

FrameTimer::FrameTimer() : 
        GameStateI("FrameTimer"),
        totalTime_(0.0f), frameCount_(0), 
        lastStateCount_(0), lastTris_(0), lastTextureSets_(0),
        fps_(0.0f)
{

}

FrameTimer::~FrameTimer()
{

}

void FrameTimer::draw(const unsigned state)
{
        frameCount_++;

        lastStateCount_ = GLState::getStateSwitches();
        GLState::resetStateSwitches();

        lastTris_ = GLInfo::getNoTriangles();
        GLInfo::resetNoTriangles();
        
        lastTextureSets_ = GLTexture::getTextureSets();
        GLTexture::resetTextureSets();
}

void FrameTimer::simulate(const unsigned state, float frameTime)
{
        totalTime_ += frameTime;
        if (totalTime_ > 5.0f)
        {
                float timeTaken = frameClock_.getTimeDifference();
                fps_ = float(frameCount_) / timeTaken;
                totalTime_ = 0.0f;
                frameCount_ = 0;

                if (OptionsDisplay::instance()->getFrameTimer())
                {
                        ChannelText chText("info", 
                                LANG_RESOURCE_1(
                                        "X_FRAMES_PER_SECOND", 
                                        "{0} frames per second.", 
                                        S3D::formatStringBuffer("%.2f", fps_)));
                        chText.setFlags(ChannelText::eNoLog | ChannelText::eNoSound);
                        ClientChannelManager::instance()->showText(chText);
                }
        }
}

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