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 int mouse_x, mouse_y;
  16 unsigned int mouse_bmask;
  17
  18 static unsigned long nframes;
  19 static const char *start_scr_name = "tunnel";
  20
  21 int demo_init(int argc, char **argv)
  22 {
  23         if(argv[1]) {
  24                 start_scr_name = argv[1];
  25         }
  26
  27         if(scr_init() == -1) {
  28                 return -1;
  29         }
  30         if(scr_change(scr_lookup(start_scr_name), 4000) == -1) {
  31                 fprintf(stderr, "screen %s not found\n", start_scr_name);
  32                 return -1;
  33         }
  34
  35         /* clear the framebuffer at least once */
  36         memset(fb_pixels, 0, fb_width * fb_height * fb_bpp / CHAR_BIT);
  37         return 0;
  38 }
  39
  40 void demo_cleanup(void)
  41 {
  42         scr_shutdown();
  43
  44         if(time_msec) {
  45                 float fps = (float)nframes / ((float)time_msec / 1000.0f);
  46                 printf("average framerate: %.1f\n", fps);
  47         }
  48 }
  49
  50 void demo_draw(void)
  51 {
  52         scr_update();
  53         scr_draw();
  54
  55         ++nframes;
  56 }
  57
  58 void demo_keyboard(int key, int state)
  59 {
  60         if(state) {
  61                 switch(key) {
  62                 case 27:
  63                         demo_quit();
  64                         break;
  65
  66                 default:
  67                         break;
  68                 }
  69         }
  70 }