git.mutantstargoat.com Git - gbajam22/blob - src/game.c

   1 #include <string.h>
   2 #include "gba.h"
   3 #include "game.h"
   4
   5 struct screen *init_logo_screen(void);
   6 struct screen *init_menu_screen(void);
   7 struct screen *init_game_screen(void);
   8 struct screen *init_controls_screen(void);
   9
  10 struct screen *curscr;
  11
  12 #define MAX_SCR 4
  13 static struct screen *scrlist[MAX_SCR];
  14 static int num_scr;
  15
  16 int init_screens(void)
  17 {
  18         if(!(scrlist[num_scr++] = init_logo_screen())) {
  19                 return -1;
  20         }
  21         if(!(scrlist[num_scr++] = init_menu_screen())) {
  22                 return -1;
  23         }
  24         if(!(scrlist[num_scr++] = init_controls_screen())) {
  25                 return -1;
  26         }
  27         if(!(scrlist[num_scr++] = init_game_screen())) {
  28                 return -1;
  29         }
  30         return 0;
  31 }
  32
  33 int change_screen(struct screen *scr)
  34 {
  35         if(!scr) return -1;
  36
  37         mask(INTR_VBLANK);
  38
  39         if(curscr && curscr->stop) {
  40                 curscr->stop();
  41         }
  42         if(scr->start && scr->start() == -1) {
  43                 return -1;
  44         }
  45         curscr = scr;
  46
  47         unmask(INTR_VBLANK);
  48         return 0;
  49 }
  50
  51 struct screen *find_screen(const char *name)
  52 {
  53         int i;
  54         for(i=0; i<num_scr; i++) {
  55                 if(strcmp(scrlist[i]->name, name) == 0) {
  56                         return scrlist[i];
  57                 }
  58         }
  59         return 0;
  60 }