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 #include "3dgfx.h"
  10
  11 int fb_width = 320;
  12 int fb_height = 240;
  13 int fb_bpp = 16;
  14 void *fb_pixels;
  15 unsigned long time_msec;
  16 int mouse_x, mouse_y;
  17 unsigned int mouse_bmask;
  18
  19 static unsigned long nframes;
  20 static const char *start_scr_name;
  21
  22 int demo_init(int argc, char **argv)
  23 {
  24         struct screen *scr;
  25
  26         if(argv[1]) {
  27                 start_scr_name = argv[1];
  28         }
  29
  30         if(g3d_init() == -1) {
  31                 return -1;
  32         }
  33         g3d_framebuffer(fb_width, fb_height, fb_pixels);
  34
  35         if(scr_init() == -1) {
  36                 return -1;
  37         }
  38         if(start_scr_name) {
  39                 scr = scr_lookup(start_scr_name);
  40         } else {
  41                 scr = scr_screen(0);
  42         }
  43
  44         if(!scr || scr_change(scr, 4000) == -1) {
  45                 fprintf(stderr, "screen %s not found\n", start_scr_name ? start_scr_name : "0");
  46                 return -1;
  47         }
  48
  49         /* clear the framebuffer at least once */
  50         memset(fb_pixels, 0, fb_width * fb_height * fb_bpp / CHAR_BIT);
  51         return 0;
  52 }
  53
  54 void demo_cleanup(void)
  55 {
  56         scr_shutdown();
  57         g3d_destroy();
  58
  59         if(time_msec) {
  60                 float fps = (float)nframes / ((float)time_msec / 1000.0f);
  61                 printf("average framerate: %.1f\n", fps);
  62         }
  63 }
  64
  65 void demo_draw(void)
  66 {
  67         scr_update();
  68         scr_draw();
  69
  70         ++nframes;
  71 }
  72
  73 void demo_keyboard(int key, int state)
  74 {
  75         if(state) {
  76                 switch(key) {
  77                 case 27:
  78                         demo_quit();
  79                         break;
  80
  81                 default:
  82                         if(key >= '1' && key <= '1' + scr_num_screens()) {
  83                                 int idx = key - '1';
  84                                 printf("change screen %d\n", idx);
  85                                 scr_change(scr_screen(idx), 4000);
  86                         }
  87                         break;
  88                 }
  89         }
  90 }