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                 return -1;
  39         }
  40
  41         if(scr_init() == -1) {
  42                 return -1;
  43         }
  44         if(start_scr_name) {
  45                 scr = scr_lookup(start_scr_name);
  46         } else {
  47                 scr = scr_screen(0);
  48         }
  49
  50         if(!scr || scr_change(scr, 4000) == -1) {
  51                 fprintf(stderr, "screen %s not found\n", start_scr_name ? start_scr_name : "0");
  52                 return -1;
  53         }
  54
  55         /* clear the framebuffer at least once */
  56         memset(fb_pixels, 0, fb_width * fb_height * fb_bpp / CHAR_BIT);
  57
  58         music_play();
  59         return 0;
  60 }
  61
  62 void demo_cleanup(void)
  63 {
  64         music_close();
  65         scr_shutdown();
  66         g3d_destroy();
  67
  68         if(time_msec) {
  69                 float fps = (float)nframes / ((float)time_msec / 1000.0f);
  70                 printf("average framerate: %.1f\n", fps);
  71         }
  72 }
  73
  74 void demo_draw(void)
  75 {
  76         music_update();
  77         scr_update();
  78         scr_draw();
  79
  80         ++nframes;
  81 }
  82
  83 void demo_keyboard(int key, int state)
  84 {
  85         if(state) {
  86                 switch(key) {
  87                 case 27:
  88                         demo_quit();
  89                         break;
  90
  91                 default:
  92                         if(key >= '1' && key <= '1' + scr_num_screens()) {
  93                                 int idx = key - '1';
  94                                 printf("change screen %d\n", idx);
  95                                 scr_change(scr_screen(idx), 4000);
  96                         }
  97                         break;
  98                 }
  99         }
 100 }