toys/sww/source/perf_monitor.h

#pragma once

#include <stdint.h> /**< uint32_t */

#include "sww/renderer.h"

#ifdef __cplusplus
extern "C" {
#endif

typedef struct {
  uint32_t cursor;
  uint32_t capacity;
  uint32_t count;
  float sum;
  float values[0];
} swwPerfMonitor;

swwPerfMonitor *swwPerfMonitor_CreateWithCount(uint32_t value_count);
void swwPerfMonitor_Destroy(swwPerfMonitor *o);
void swwPerfMonitor_Update(swwPerfMonitor *o, float frame_time);

#define swwPerfMonitor_Create() swwPerfMonitor_CreateWithCount(30)
#define swwPerfMonitor_GetAverage(o) ((o)->sum / (o)->count)

/* Draw the PerfMonitor as a layer on the canvas */
void swwPerfMonitor_Render(swwPerfMonitor *o, swwRenderer *renderer,
                           Point2i pos, Sizei size);

#ifdef __cplusplus
}
#endif