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 #include "music.h"
  11
  12 int fb_width = 320;
  13 int fb_height = 240;
  14 int fb_bpp = 16;
  15 uint16_t *fb_pixels, *vmem_back, *vmem_front;
  16 unsigned long time_msec;
  17 int mouse_x, mouse_y;
  18 unsigned int mouse_bmask;
  19
  20 static unsigned long nframes;
  21 static const char *start_scr_name;
  22
  23 int demo_init(int argc, char **argv)
  24 {
  25         struct screen *scr;
  26
  27         start_scr_name = getenv("START_SCR");
  28         if(argv[1]) {
  29                 start_scr_name = argv[1];
  30         }
  31
  32         if(g3d_init() == -1) {
  33                 return -1;
  34         }
  35         g3d_framebuffer(fb_width, fb_height, fb_pixels);
  36
  37         if(music_open("data/test.mod") == -1) {
  38                 fprintf(stderr, "failed to open music: data/test.mod\n");
  39                 return -1;
  40         }
  41
  42         if(scr_init() == -1) {
  43                 return -1;
  44         }
  45         if(start_scr_name) {
  46                 scr = scr_lookup(start_scr_name);
  47         } else {
  48                 scr = scr_screen(0);
  49         }
  50
  51         if(!scr || scr_change(scr, 4000) == -1) {
  52                 fprintf(stderr, "screen %s not found\n", start_scr_name ? start_scr_name : "0");
  53                 return -1;
  54         }
  55
  56         /* clear the framebuffer at least once */
  57         memset(fb_pixels, 0, fb_width * fb_height * fb_bpp / CHAR_BIT);
  58
  59         music_play();
  60         return 0;
  61 }
  62
  63 void demo_cleanup(void)
  64 {
  65         music_close();
  66         scr_shutdown();
  67         g3d_destroy();
  68
  69         if(time_msec) {
  70                 float fps = (float)nframes / ((float)time_msec / 1000.0f);
  71                 printf("average framerate: %.1f\n", fps);
  72         }
  73 }
  74
  75 void demo_draw(void)
  76 {
  77         music_update();
  78         scr_update();
  79         scr_draw();
  80
  81         ++nframes;
  82 }
  83
  84 void demo_keyboard(int key, int state)
  85 {
  86         if(state) {
  87                 switch(key) {
  88                 case 27:
  89                         demo_quit();
  90                         break;
  91
  92                 default:
  93                         if(key >= '1' && key <= '1' + scr_num_screens()) {
  94                                 int idx = key - '1';
  95                                 printf("change screen %d\n", idx);
  96                                 scr_change(scr_screen(idx), 4000);
  97                         }
  98                         break;
  99                 }
 100         }
 101 }