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59 lines
1.6 KiB
C++
59 lines
1.6 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 modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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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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*
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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, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef GFX_FRAMELIMITER_H
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#define GFX_FRAMELIMITER_H
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#include "common/system.h"
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namespace Graphics {
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/**
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* A framerate limiter
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*
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* Ensures the framerate does not exceed the specified value
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* by delaying until all of the timeslot allocated to the frame
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* is consumed.
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* Allows to curb CPU usage and have a stable framerate.
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*/
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class FrameLimiter {
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public:
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FrameLimiter(OSystem *system, const uint framerate);
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void startFrame();
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void delayBeforeSwap();
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void pause(bool pause);
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uint getLastFrameDuration() const;
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private:
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OSystem *_system;
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bool _enabled;
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uint _speedLimitMs;
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uint _startFrameTime;
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uint _lastFrameDurationMs;
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};
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} // End of namespace Graphics
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#endif // GFX_FRAMELIMITER_H
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