git.mutantstargoat.com Git - summerhack/blob - src/3dengfx/src/common/fps_counter.c

   1 #include <stdio.h>
   2 #include "fps_counter.h"
   3
   4 void fps_start(fps_counter *fpsc, unsigned long time, unsigned long sample_interval) {
   5         fpsc->sample_interval = sample_interval;
   6         fpsc->sample_start_time = time;
   7         fpsc->frame_count = 0;
   8         fpsc->fps = 0.0f;
   9 }
  10
  11 int fps_frame_proc(fps_counter *fpsc, unsigned long time) {
  12         if(time - fpsc->sample_start_time < fpsc->sample_interval) {
  13                 fpsc->frame_count++;
  14                 return 0;
  15         } else {
  16                 fpsc->fps = (float)fpsc->frame_count / ((float)fpsc->sample_interval / 1000.0f);
  17
  18                 fpsc->sample_start_time = time;
  19                 fpsc->frame_count = 0;
  20                 return 1;
  21         }
  22 }
  23
  24 /* changed it to a macro, see header */
  25 /*
  26 float fps_get_frame_rate(fps_counter *fpsc) {
  27         return fpsc->fps;
  28 }
  29 */
  30
  31 const char *fps_get_frame_rate_str(fps_counter *fpsc) {
  32         static char str[32];
  33         sprintf(str, "%.1f", fpsc->fps);
  34         return str;
  35 }