frame_limiter.h

#pragma once
 
#include <chrono>
 
namespace Vkm::Engine {

class FrameLimiter {
    public:
        FrameLimiter();
        ~FrameLimiter();
 
        FrameLimiter(const FrameLimiter& other) = delete;
        FrameLimiter& operator=(const FrameLimiter& other) = delete;
 
        FrameLimiter(FrameLimiter && other) = delete;
        FrameLimiter& operator=(FrameLimiter && other) = delete;
 
    public:
        void beginFrame();

        void endFrame();

        void setTargetFramerate(int framerate) { m_targetFramerate = framerate > 0 ? framerate : 0; }

        int targetFramerate() const { return m_targetFramerate; }
 
    private:
        void sleepFor(std::chrono::steady_clock::duration span);
 
    private:
        int m_targetFramerate = 0;
        std::chrono::steady_clock::time_point m_frameStart;

        std::chrono::steady_clock::time_point m_deadline;
 
        void* m_timer = nullptr;  
};
 
} // namespace Vkm::Engine