FpsLabel.hpp

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/*============================================================================*/
#ifndef SHISHGL_FPS_LABEL_HPP
#define SHISHGL_FPS_LABEL_HPP
/*============================================================================*/
#include "UILabel.hpp"
#include "Time.hpp"
/*============================================================================*/
namespace Sh {
 
    class FpsLabel : public UILabel {
    public:
 
        explicit FpsLabel(const Frame& frame)
            : UILabel(frame, std::string_view(fps_buf, sizeof(fps_buf) - 1))
            , frames_count(0) {
            timer.reset();
        }
 
        void onRender() override {
 
            TimeDelta elapsed = timer.elapsed();
            if (elapsed.count() > 1000000000LL) {
 
                snprintf(fps_buf, sizeof(fps_buf),
                         "fps: %lu", frames_count);
 
                frames_count = 0;
                timer.reset();
 
            } else {
 
                ++frames_count;
            }
 
            UILabel::onRender();
        }
 
    private:
 
        char fps_buf[16] = "";
 
        Timer timer;
        size_t frames_count;
 
    };
 
}
/*============================================================================*/
#endif //SHISHGL_FPS_LABEL_HPP
/*============================================================================*/