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 #include "cfgopt.h"
  12
  13 int fb_width = 320;
  14 int fb_height = 240;
  15 int fb_bpp = 16;
  16 uint16_t *fb_pixels, *vmem_back, *vmem_front;
  17 unsigned long time_msec;
  18 int mouse_x, mouse_y;
  19 unsigned int mouse_bmask;
  20
  21 static unsigned long nframes;
  22
  23 int demo_init(int argc, char **argv)
  24 {
  25         struct screen *scr;
  26         char *env;
  27
  28         if(load_config("demo.cfg") == -1) {
  29                 return -1;
  30         }
  31         if((env = getenv("START_SCR"))) {
  32                 opt.start_scr = env;
  33         }
  34         if(parse_args(argc, argv) == -1) {
  35                 return -1;
  36         }
  37
  38         if(g3d_init() == -1) {
  39                 return -1;
  40         }
  41         g3d_framebuffer(fb_width, fb_height, fb_pixels);
  42
  43         if(opt.music) {
  44                 if(music_open("data/test.mod") == -1) {
  45                         return -1;
  46                 }
  47         }
  48
  49         if(scr_init() == -1) {
  50                 return -1;
  51         }
  52         if(opt.start_scr) {
  53                 scr = scr_lookup(opt.start_scr);
  54         } else {
  55                 scr = scr_screen(0);
  56         }
  57
  58         if(!scr || scr_change(scr, 4000) == -1) {
  59                 fprintf(stderr, "screen %s not found\n", opt.start_scr ? opt.start_scr : "0");
  60                 return -1;
  61         }
  62
  63         /* clear the framebuffer at least once */
  64         memset(fb_pixels, 0, fb_width * fb_height * fb_bpp / CHAR_BIT);
  65
  66         if(opt.music) {
  67                 music_play();
  68         }
  69         return 0;
  70 }
  71
  72 void demo_cleanup(void)
  73 {
  74         if(opt.music) {
  75                 music_close();
  76         }
  77         scr_shutdown();
  78         g3d_destroy();
  79
  80         if(time_msec) {
  81                 float fps = (float)nframes / ((float)time_msec / 1000.0f);
  82                 printf("average framerate: %.1f\n", fps);
  83         }
  84 }
  85
  86 void demo_draw(void)
  87 {
  88         if(opt.music) {
  89                 music_update();
  90         }
  91         scr_update();
  92         scr_draw();
  93
  94         ++nframes;
  95 }
  96
  97 void demo_keyboard(int key, int state)
  98 {
  99         if(state) {
 100                 switch(key) {
 101                 case 27:
 102                         demo_quit();
 103                         break;
 104
 105                 default:
 106                         if(key >= '1' && key <= '1' + scr_num_screens()) {
 107                                 int idx = key - '1';
 108                                 printf("change screen %d\n", idx);
 109                                 scr_change(scr_screen(idx), 4000);
 110                         }
 111                         break;
 112                 }
 113         }
 114 }