core/src/cpp/fps_counter.h


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#pragma once

#include "sprite.h"

struct FPS_Counter {
    explicit FPS_Counter(SDL_Renderer* renderer);

    void draw();

    /*!
     * \brief fps_cur - the FPS readings are updated once in a while; fps_cur is
     * the number of draw() calls since the last reading
     */
    int fps_cur{0};
    /*!
     * \brief fps_prev - and here is the last fps reading
     */
    int fps_prev{0};
    /*!
     * \brief timestamp - last time fps_prev was updated
     */
    TimeStamp timestamp{Clock::now()};
    /*!
     * \brief renderer - draw here
     */
    SDL_Renderer* renderer{nullptr};
    /*!
     * \brief numbers - "font" file
     */
    const Sprite numbers;
};