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

   1 #include <stdlib.h>
   2 #include <string.h>
   3 #include <GL/gl.h>
   4 #include "game.h"
   5
   6 int mouse_x, mouse_y, mouse_state[3];
   7 int win_width, win_height;
   8 float win_aspect;
   9
  10 struct game_screen *cur_scr;
  11
  12 /* available screens */
  13 extern struct game_screen scr_menu, scr_game, scr_map;
  14 #define MAX_SCREENS     4
  15 static struct game_screen *screens[MAX_SCREENS];
  16 static int num_screens;
  17
  18
  19 int game_init(void)
  20 {
  21         int i;
  22         char *start_scr_name;
  23
  24         /* initialize screens */
  25         screens[num_screens++] = &scr_menu;
  26         screens[num_screens++] = &scr_game;
  27         screens[num_screens++] = &scr_map;
  28
  29         start_scr_name = getenv("START_SCREEN");
  30
  31         for(i=0; i<num_screens; i++) {
  32                 if(screens[i]->init() == -1) {
  33                         return -1;
  34                 }
  35                 if(screens[i]->name && start_scr_name && strcmp(screens[i]->name, start_scr_name) == 0) {
  36                         game_chscr(screens[i]);
  37                 }
  38         }
  39         if(!cur_scr) {
  40                 game_chscr(&scr_game);  /* TODO: scr_menu */
  41         }
  42
  43         glClearColor(0.3, 0.3, 0.3, 1);
  44         return 0;
  45 }
  46
  47 void game_shutdown(void)
  48 {
  49         int i;
  50
  51         for(i=0; i<num_screens; i++) {
  52                 if(screens[i]->destroy) {
  53                         screens[i]->destroy();
  54                 }
  55         }
  56 }
  57
  58 void game_display(void)
  59 {
  60         glClear(GL_COLOR_BUFFER_BIT);
  61
  62         if(cur_scr) {
  63                 cur_scr->display();
  64         }
  65
  66         game_swap_buffers();
  67 }
  68
  69 void game_reshape(int x, int y)
  70 {
  71         win_width = x;
  72         win_height = y;
  73         win_aspect = (float)x / (float)y;
  74         glViewport(0, 0, x, y);
  75
  76         if(cur_scr && cur_scr->reshape) {
  77                 cur_scr->reshape(x, y);
  78         }
  79 }
  80
  81 void game_keyboard(int key, int press)
  82 {
  83         if(press) {
  84                 switch(key) {
  85                 case 27:
  86                         game_quit();
  87                         break;
  88                 }
  89         }
  90
  91         if(cur_scr && cur_scr->keyboard) {
  92                 cur_scr->keyboard(key, press);
  93         }
  94 }
  95
  96 void game_mouse(int bn, int st, int x, int y)
  97 {
  98         mouse_x = x;
  99         mouse_y = y;
 100         if(bn < 3) {
 101                 mouse_state[bn] = st;
 102         }
 103
 104         if(cur_scr && cur_scr->mouse) {
 105                 cur_scr->mouse(bn, st, x, y);
 106         }
 107 }
 108
 109 void game_motion(int x, int y)
 110 {
 111         mouse_x = x;
 112         mouse_y = y;
 113
 114         if(cur_scr && cur_scr->motion) {
 115                 cur_scr->motion(x, y);
 116         }
 117 }
 118
 119 void game_chscr(struct game_screen *scr)
 120 {
 121         if(!scr) return;
 122
 123         if(scr->start && scr->start() == -1) {
 124                 return;
 125         }
 126
 127         if(cur_scr && cur_scr->stop) {
 128                 cur_scr->stop();
 129         }
 130         cur_scr = scr;
 131 }