mirror of
https://github.com/love2d/love.git
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rude
95 lines
2.1 KiB
C++
95 lines
2.1 KiB
C++
/**
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* Copyright (c) 2006-2009 LOVE Development Team
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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* 3. This notice may not be removed or altered from any source distribution.
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**/
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#include "Timer.h"
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namespace love
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{
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namespace timer
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{
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namespace sdl
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{
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Timer::Timer()
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: time_init(0), currTime(0), prevFpsUpdate(0), fps(0), fpsUpdateFrequency(1),
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frames(0), dt(0)
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{
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// Init the SDL timer system.
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if(SDL_InitSubSystem(SDL_INIT_TIMER) < 0)
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throw Exception(SDL_GetError());
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}
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Timer::~Timer()
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{
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// Quit SDL timer.
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SDL_QuitSubSystem(SDL_INIT_TIMER);
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}
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const char * Timer::getName() const
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{
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return "love.timer.sdl";
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}
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void Timer::step()
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{
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// Frames rendered
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frames++;
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// "Current" time is previous time by now.
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prevTime = currTime;
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// Get ticks from SDL
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currTime = SDL_GetTicks();
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// Convert to number of seconds
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dt = (currTime - prevTime)/1000.0f;
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// Update FPS?
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if((currTime - prevFpsUpdate)/1000.0f > fpsUpdateFrequency)
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{
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fps = frames/fpsUpdateFrequency;
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prevFpsUpdate = currTime;
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frames = 0;
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}
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}
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void Timer::sleep(unsigned int ms)
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{
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SDL_Delay(ms);
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}
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float Timer::getDelta() const
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{
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return dt;
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}
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float Timer::getFPS() const
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{
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return fps;
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}
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float Timer::getTime() const
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{
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return (SDL_GetTicks() - time_init)/1000.0f;
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}
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} // sdl
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} // timer
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} // love
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