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75 lines
2.5 KiB
75 lines
2.5 KiB
/*
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* Copyright (c) 2010-2015 OTClient <https://github.com/edubart/otclient>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef ADAPTATIVEFRAMECOUNTER_H
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#define ADAPTATIVEFRAMECOUNTER_H
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#include <framework/global.h>
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/**
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* Class that help counting and limiting frames per second in a application,
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* to make fps limit work as desired, this class requires 2 platforms prerequisites:
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* - the platform must have timer with a precision of at least 1ms
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* - the platform sleep must have a precision of at least 4ms
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*/
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class AdaptativeFrameCounter
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{
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public:
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enum {
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// 4ms because most platforms has kernel timer of 250Hz
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MINIMUM_MICROS_SLEEP = 4000
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};
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AdaptativeFrameCounter();
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bool shouldProcessNextFrame();
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void processNextFrame();
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bool update();
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void setMaxFps(int maxFps);
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bool isFpsLimitActive() { return m_maxFps != 0; }
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int getMaximumSleepMicros();
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float getFrameDelayHit();
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int getLastFps() { return m_lastFps; }
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int getPartialFps() { return (int)m_partialFps; }
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int getMaxFps() { return m_maxFps; }
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int getFrames() { return m_frames; }
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float getMediumFrameDelay() { return m_mediumFrameDelay; }
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private:
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int m_frames;
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int m_partialFrames;
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float m_partialFps;
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float m_maxPartialFps;
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ticks_t m_frameDelaySum;
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ticks_t m_mediumFrameDelay;
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ticks_t m_lastFrame;
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int m_lastFps;
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int m_maxFps;
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ticks_t m_bestFrameDelay;
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ticks_t m_lastFpsUpdate;
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ticks_t m_lastPartialFpsUpdate;
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float m_sleepMicros;
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};
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#endif
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