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 #include "tinyfps.h"
  13
  14 int fb_width = 320;
  15 int fb_height = 240;
  16 int fb_bpp = 16;
  17 uint16_t *fb_pixels, *vmem_back, *vmem_front;
  18 unsigned long time_msec;
  19 int mouse_x, mouse_y;
  20 unsigned int mouse_bmask;
  21
  22 float sball_matrix[] = {1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1};
  23
  24 static unsigned long nframes;
  25
  26 int demo_init(int argc, char **argv)
  27 {
  28         struct screen *scr;
  29         char *env;
  30
  31         if(load_config("demo.cfg") == -1) {
  32                 return -1;
  33         }
  34         if((env = getenv("START_SCR"))) {
  35                 opt.start_scr = env;
  36         }
  37         if(parse_args(argc, argv) == -1) {
  38                 return -1;
  39         }
  40
  41         initFpsFonts();
  42
  43         if(g3d_init() == -1) {
  44                 return -1;
  45         }
  46         g3d_framebuffer(fb_width, fb_height, fb_pixels);
  47
  48         if(opt.music) {
  49                 if(music_open("data/test.mod") == -1) {
  50                         return -1;
  51                 }
  52         }
  53
  54         if(scr_init() == -1) {
  55                 return -1;
  56         }
  57         if(opt.start_scr) {
  58                 scr = scr_lookup(opt.start_scr);
  59         } else {
  60                 scr = scr_screen(0);
  61         }
  62
  63         if(!scr || scr_change(scr, 4000) == -1) {
  64                 fprintf(stderr, "screen %s not found\n", opt.start_scr ? opt.start_scr : "0");
  65                 return -1;
  66         }
  67
  68         /* clear the framebuffer at least once */
  69         memset(fb_pixels, 0, fb_width * fb_height * fb_bpp / CHAR_BIT);
  70
  71         if(opt.music) {
  72                 music_play();
  73         }
  74         return 0;
  75 }
  76
  77 void demo_cleanup(void)
  78 {
  79         if(opt.music) {
  80                 music_close();
  81         }
  82         scr_shutdown();
  83         g3d_destroy();
  84
  85         if(time_msec) {
  86                 float fps = (float)nframes / ((float)time_msec / 1000.0f);
  87                 printf("average framerate: %.1f\n", fps);
  88         }
  89 }
  90
  91 void demo_draw(void)
  92 {
  93         if(opt.music) {
  94                 music_update();
  95         }
  96         scr_update();
  97         scr_draw();
  98
  99         ++nframes;
 100 }
 101
 102 void demo_keyboard(int key, int state)
 103 {
 104         if(state) {
 105                 switch(key) {
 106                 case 27:
 107                         demo_quit();
 108                         break;
 109
 110                 default:
 111                         if(key >= '1' && key <= '1' + scr_num_screens()) {
 112                                 int idx = key - '1';
 113                                 printf("change screen %d\n", idx);
 114                                 scr_change(scr_screen(idx), 4000);
 115                         }
 116                         break;
 117                 }
 118         }
 119 }