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