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