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 "demo.h"
   7
   8 int fbwidth = 320;
   9 int fbheight = 240;
  10 int fbbpp = 8;
  11 unsigned char *fbpixels;
  12 unsigned long time_msec;
  13
  14 static unsigned long nframes;
  15
  16 int demo_init(int argc, char **argv)
  17 {
  18         return 0;
  19 }
  20
  21 void demo_cleanup(void)
  22 {
  23         if(time_msec) {
  24                 float fps = (float)nframes / ((float)time_msec / 1000.0f);
  25                 printf("average framerate: %.1f\n", fps);
  26         }
  27 }
  28
  29 void demo_draw(void)
  30 {
  31         int i, j;
  32         unsigned char *fbptr = fbpixels;
  33
  34         for(i=0; i<fbheight; i++) {
  35                 for(j=0; j<fbwidth; j++) {
  36                         int val = i^j;
  37
  38                         *fbptr++ = val;
  39                 }
  40         }
  41
  42         ++nframes;
  43 }
  44
  45 void demo_keyboard(int key, int state)
  46 {
  47         if(state) {
  48                 switch(key) {
  49                 case 27:
  50                         demo_quit();
  51                         break;
  52
  53                 default:
  54                         break;
  55                 }
  56         }
  57 }