mirror of https://github.com/stella-emu/stella.git
65 lines
1.5 KiB
C++
65 lines
1.5 KiB
C++
//============================================================================
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//
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// SSSS tt lll lll
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// SS SS tt ll ll
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// SS tttttt eeee ll ll aaaa
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// SSSS tt ee ee ll ll aa
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// SS tt eeeeee ll ll aaaaa -- "An Atari 2600 VCS Emulator"
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// SS SS tt ee ll ll aa aa
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// SSSS ttt eeeee llll llll aaaaa
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//
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// Copyright (c) 1995-2022 by Bradford W. Mott, Stephen Anthony
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// and the Stella Team
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//
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// See the file "License.txt" for information on usage and redistribution of
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// this file, and for a DISCLAIMER OF ALL WARRANTIES.
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//============================================================================
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#ifndef FPS_METER_HXX
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#define FPS_METER_HXX
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#include <chrono>
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#include "bspf.hxx"
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class FpsMeter
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{
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public:
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explicit FpsMeter(uInt32 queueSize);
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void reset(uInt32 garbageFrameLimit = 0);
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void render(uInt32 frameCount);
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float fps() const;
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private:
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struct entry {
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uInt32 frames{0};
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std::chrono::time_point<std::chrono::high_resolution_clock> timestamp;
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};
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private:
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vector<entry> myQueue;
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uInt32 myQueueOffset{0};
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uInt32 myFrameCount{0};
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uInt32 myGarbageFrameCounter{0};
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uInt32 myGarbageFrameLimit{0};
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float myFps{0.F};
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private:
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FpsMeter(const FpsMeter&) = delete;
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FpsMeter(FpsMeter&&) = delete;
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FpsMeter& operator=(const FpsMeter&) = delete;
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FpsMeter& operator=(FpsMeter&&) = delete;
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};
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#endif // FPS_METER_HXX
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