git.mutantstargoat.com Git - dosdemo/blob - src/demo.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <string.h>
   4 #include <math.h>
   5 #include <errno.h>
   6 #include <limits.h>
   7 #include "demo.h"
   8 #include "screen.h"
   9
  10 int fb_width = 320;
  11 int fb_height = 240;
  12 int fb_bpp = 16;
  13 void *fb_pixels;
  14 unsigned long time_msec;
  15
  16 static unsigned long nframes;
  17
  18 int demo_init(int argc, char **argv)
  19 {
  20         if(scr_init() == -1) {
  21                 return -1;
  22         }
  23         scr_change(scr_lookup("tunnel"), 4000);
  24
  25         /* clear the framebuffer at least once */
  26         memset(fb_pixels, 0, fb_width * fb_height * fb_bpp / CHAR_BIT);
  27         return 0;
  28 }
  29
  30 void demo_cleanup(void)
  31 {
  32         scr_shutdown();
  33
  34         if(time_msec) {
  35                 float fps = (float)nframes / ((float)time_msec / 1000.0f);
  36                 printf("average framerate: %.1f\n", fps);
  37         }
  38 }
  39
  40 void demo_draw(void)
  41 {
  42         scr_update();
  43         scr_draw();
  44
  45         ++nframes;
  46 }
  47
  48 void demo_keyboard(int key, int state)
  49 {
  50         if(state) {
  51                 switch(key) {
  52                 case 27:
  53                         demo_quit();
  54                         break;
  55
  56                 default:
  57                         break;
  58                 }
  59         }
  60 }