src/setup.cpp

   1 /*
   2   setup.c
   3
   4   Super Tux - Setup
   5
   6   by Bill Kendrick
   7   bill@newbreedsoftware.com
   8   http://www.newbreedsoftware.com/supertux/
   9
  10   April 11, 2000 - March 15, 2004
  11 */
  12
  13 #include <assert.h>
  14 #include <stdio.h>
  15 #include <stdlib.h>
  16 #include <string.h>
  17 #include <errno.h>
  18 #include <unistd.h>
  19 #include <SDL.h>
  20 #include <SDL_image.h>
  21 #ifndef NOOPENGL
  22 #include <SDL_opengl.h>
  23 #endif
  24
  25 #ifndef WIN32
  26 #include <pwd.h>
  27 #include <sys/stat.h>
  28 #include <sys/types.h>
  29 #include <dirent.h>
  30 #include <libgen.h>
  31 #include <ctype.h>
  32 #endif
  33
  34 #include "defines.h"
  35 #include "globals.h"
  36 #include "setup.h"
  37 #include "screen.h"
  38 #include "texture.h"
  39 #include "menu.h"
  40 #include "gameloop.h"
  41
  42 /* Local function prototypes: */
  43
  44 void seticon(void);
  45 void usage(char * prog, int ret);
  46
  47 /* Does the given file exist and is it accessible? */
  48 int faccessible(const char *filename)
  49 {
  50   struct stat filestat;
  51   if (stat(filename, &filestat) == -1)
  52     {
  53       return NO;
  54     }
  55   else
  56     {
  57       if(S_ISREG(filestat.st_mode))
  58         return YES;
  59       else
  60         return NO;
  61     }
  62 }
  63
  64 /* Can we write to this location? */
  65 int fwriteable(const char *filename)
  66 {
  67   FILE* fi;
  68   fi = fopen(filename, "wa");
  69   if (fi == NULL)
  70     {
  71       return NO;
  72     }
  73   return YES;
  74 }
  75
  76 /* Makes sure a directory is created in either the SuperTux base directory or the SuperTux base directory.*/
  77 int fcreatedir(const char* relative_dir)
  78 {
  79   char path[1024];
  80   snprintf(path, 1024, "%s/%s/", st_dir, relative_dir);
  81   if(mkdir(path,0755) != 0)
  82     {
  83       snprintf(path, 1024, "%s/%s/", datadir.c_str(), relative_dir);
  84       if(mkdir(path,0755) != 0)
  85         {
  86           return NO;
  87         }
  88       else
  89         {
  90           return YES;
  91         }
  92     }
  93   else
  94     {
  95       return YES;
  96     }
  97 }
  98
  99 /* Get all names of sub-directories in a certain directory. */
 100 /* Returns the number of sub-directories found. */
 101 /* Note: The user has to free the allocated space. */
 102 string_list_type dsubdirs(const char *rel_path,const  char* expected_file)
 103 {
 104   DIR *dirStructP;
 105   struct dirent *direntp;
 106   string_list_type sdirs;
 107   char filename[1024];
 108   char path[1024];
 109
 110   string_list_init(&sdirs);
 111   sprintf(path,"%s/%s",st_dir,rel_path);
 112   if((dirStructP = opendir(path)) != NULL)
 113     {
 114       while((direntp = readdir(dirStructP)) != NULL)
 115         {
 116           char absolute_filename[1024];
 117           struct stat buf;
 118
 119           sprintf(absolute_filename, "%s/%s", path, direntp->d_name);
 120
 121           if (stat(absolute_filename, &buf) == 0 && S_ISDIR(buf.st_mode))
 122             {
 123               if(expected_file != NULL)
 124                 {
 125                   sprintf(filename,"%s/%s/%s",path,direntp->d_name,expected_file);
 126                   if(!faccessible(filename))
 127                     continue;
 128                 }
 129
 130               string_list_add_item(&sdirs,direntp->d_name);
 131             }
 132         }
 133       closedir(dirStructP);
 134     }
 135
 136   sprintf(path,"%s/%s",datadir.c_str(),rel_path);
 137   if((dirStructP = opendir(path)) != NULL)
 138     {
 139       while((direntp = readdir(dirStructP)) != NULL)
 140         {
 141           char absolute_filename[1024];
 142           struct stat buf;
 143
 144           sprintf(absolute_filename, "%s/%s", path, direntp->d_name);
 145
 146           if (stat(absolute_filename, &buf) == 0 && S_ISDIR(buf.st_mode))
 147             {
 148               if(expected_file != NULL)
 149                 {
 150                   sprintf(filename,"%s/%s/%s",path,direntp->d_name,expected_file);
 151                   if(!faccessible(filename))
 152                     {
 153                       continue;
 154                     }
 155                   else
 156                     {
 157                       sprintf(filename,"%s/%s/%s/%s",st_dir,rel_path,direntp->d_name,expected_file);
 158                       if(faccessible(filename))
 159                         continue;
 160                     }
 161                 }
 162
 163               string_list_add_item(&sdirs,direntp->d_name);
 164             }
 165         }
 166       closedir(dirStructP);
 167     }
 168
 169   return sdirs;
 170 }
 171
 172 string_list_type dfiles(const char *rel_path, const  char* glob, const  char* exception_str)
 173 {
 174   DIR *dirStructP;
 175   struct dirent *direntp;
 176   string_list_type sdirs;
 177   char path[1024];
 178
 179   string_list_init(&sdirs);
 180   sprintf(path,"%s/%s",st_dir,rel_path);
 181   if((dirStructP = opendir(path)) != NULL)
 182     {
 183       while((direntp = readdir(dirStructP)) != NULL)
 184         {
 185           char absolute_filename[1024];
 186           struct stat buf;
 187
 188           sprintf(absolute_filename, "%s/%s", path, direntp->d_name);
 189
 190           if (stat(absolute_filename, &buf) == 0 && S_ISREG(buf.st_mode))
 191             {
 192               if(exception_str != NULL)
 193                 {
 194                   if(strstr(direntp->d_name,exception_str) != NULL)
 195                     continue;
 196                 }
 197               if(glob != NULL)
 198                 if(strstr(direntp->d_name,glob) == NULL)
 199                   continue;
 200
 201               string_list_add_item(&sdirs,direntp->d_name);
 202             }
 203         }
 204       closedir(dirStructP);
 205     }
 206
 207   sprintf(path,"%s/%s",datadir.c_str(),rel_path);
 208   if((dirStructP = opendir(path)) != NULL)
 209     {
 210       while((direntp = readdir(dirStructP)) != NULL)
 211         {
 212           char absolute_filename[1024];
 213           struct stat buf;
 214
 215           sprintf(absolute_filename, "%s/%s", path, direntp->d_name);
 216
 217           if (stat(absolute_filename, &buf) == 0 && S_ISREG(buf.st_mode))
 218             {
 219               if(exception_str != NULL)
 220                 {
 221                   if(strstr(direntp->d_name,exception_str) != NULL)
 222                     continue;
 223                 }
 224               if(glob != NULL)
 225                 if(strstr(direntp->d_name,glob) == NULL)
 226                   continue;
 227
 228               string_list_add_item(&sdirs,direntp->d_name);
 229             }
 230         }
 231       closedir(dirStructP);
 232     }
 233
 234   return sdirs;
 235 }
 236
 237 void free_strings(char **strings, int num)
 238 {
 239   int i;
 240   for(i=0; i < num; ++i)
 241     free(strings[i]);
 242 }
 243
 244 /* --- SETUP --- */
 245 /* Set SuperTux configuration and save directories */
 246 void st_directory_setup(void)
 247 {
 248   char *home;
 249   char str[1024];
 250   /* Get home directory (from $HOME variable)... if we can't determine it,
 251      use the current directory ("."): */
 252   if (getenv("HOME") != NULL)
 253     home = getenv("HOME");
 254   else
 255     home = ".";
 256
 257   st_dir = (char *) malloc(sizeof(char) * (strlen(home) +
 258                                            strlen("/.supertux") + 1));
 259   strcpy(st_dir, home);
 260   strcat(st_dir, "/.supertux");
 261
 262   /* Remove .supertux config-file from old SuperTux versions */
 263   if(faccessible(st_dir))
 264     {
 265       remove
 266         (st_dir);
 267     }
 268
 269   st_save_dir = (char *) malloc(sizeof(char) * (strlen(st_dir) + strlen("/save") + 1));
 270
 271   strcpy(st_save_dir,st_dir);
 272   strcat(st_save_dir,"/save");
 273
 274   /* Create them. In the case they exist they won't destroy anything. */
 275 #ifndef WIN32
 276   mkdir(st_dir, 0755);
 277   mkdir(st_save_dir, 0755);
 278
 279   sprintf(str, "%s/levels", st_dir);
 280   mkdir(str, 0755);
 281 #else
 282   mkdir(st_dir);
 283   mkdir(st_save_dir);
 284   sprintf(str, "%s/levels", st_dir);
 285   mkdir(str);
 286 #endif
 287
 288   // User has not that a datadir, so we try some magic
 289   if (datadir.empty())
 290     {
 291       // Detect datadir
 292       char exe_file[PATH_MAX];
 293       if (readlink("/proc/self/exe", exe_file, PATH_MAX) < 0)
 294         {
 295           puts("Couldn't read /proc/self/exe, using default path: " DATA_PREFIX);
 296           datadir = DATA_PREFIX;
 297         }
 298       else
 299         {
 300           std::string exedir = std::string(dirname(exe_file)) + "/";
 301
 302           datadir = exedir + "../data/"; // SuperTux run from source dir
 303           if (access(datadir.c_str(), F_OK) != 0)
 304             {
 305               datadir = exedir + "../share/supertux/"; // SuperTux run from PATH
 306               if (access(datadir.c_str(), F_OK) != 0)
 307                 { // If all fails, fall back to compiled path
 308                   datadir = DATA_PREFIX;
 309                 }
 310             }
 311         }
 312     }
 313   printf("Datadir: %s\n", datadir.c_str());
 314 }
 315
 316 /* Create and setup menus. */
 317 void st_menu(void)
 318 {
 319   menu_init(&main_menu);
 320   menu_additem(&main_menu,menu_item_create(MN_LABEL,"Main Menu",0,0));
 321   menu_additem(&main_menu,menu_item_create(MN_HL,"",0,0));
 322   menu_additem(&main_menu,menu_item_create(MN_ACTION,"Start Game",0,0));
 323   menu_additem(&main_menu,menu_item_create(MN_GOTO,"Load Game",0,&load_game_menu));
 324   menu_additem(&main_menu,menu_item_create(MN_GOTO,"Options",0,&options_menu));
 325   menu_additem(&main_menu,menu_item_create(MN_ACTION,"Level editor",0,0));
 326   menu_additem(&main_menu,menu_item_create(MN_ACTION,"Credits",0,0));
 327   menu_additem(&main_menu,menu_item_create(MN_HL,"",0,0));
 328   menu_additem(&main_menu,menu_item_create(MN_ACTION,"Quit",0,0));
 329
 330   menu_init(&options_menu);
 331   menu_additem(&options_menu,menu_item_create(MN_LABEL,"Options",0,0));
 332   menu_additem(&options_menu,menu_item_create(MN_HL,"",0,0));
 333   menu_additem(&options_menu,menu_item_create(MN_TOGGLE,"Fullscreen",use_fullscreen,0));
 334   if(audio_device == YES)
 335     {
 336       menu_additem(&options_menu,menu_item_create(MN_TOGGLE,"Sound     ",use_sound,0));
 337       menu_additem(&options_menu,menu_item_create(MN_TOGGLE,"Music     ",use_music,0));
 338     }
 339   else
 340     {
 341       menu_additem(&options_menu,menu_item_create(MN_DEACTIVE,"Sound     ",use_sound,0));
 342       menu_additem(&options_menu,menu_item_create(MN_DEACTIVE,"Music     ",use_music,0));
 343     }
 344   menu_additem(&options_menu,menu_item_create(MN_TOGGLE,"Show FPS  ",show_fps,0));
 345   menu_additem(&options_menu,menu_item_create(MN_HL,"",0,0));
 346   menu_additem(&options_menu,menu_item_create(MN_BACK,"Back",0,0));
 347
 348   menu_init(&load_game_menu);
 349   menu_additem(&load_game_menu,menu_item_create(MN_LABEL,"Load Game",0,0));
 350   menu_additem(&load_game_menu,menu_item_create(MN_HL,"",0,0));
 351   menu_additem(&load_game_menu,menu_item_create(MN_DEACTIVE,"Slot 1",0,0));
 352   menu_additem(&load_game_menu,menu_item_create(MN_DEACTIVE,"Slot 2",0,0));
 353   menu_additem(&load_game_menu,menu_item_create(MN_DEACTIVE,"Slot 3",0,0));
 354   menu_additem(&load_game_menu,menu_item_create(MN_DEACTIVE,"Slot 4",0,0));
 355   menu_additem(&load_game_menu,menu_item_create(MN_DEACTIVE,"Slot 5",0,0));
 356   menu_additem(&load_game_menu,menu_item_create(MN_HL,"",0,0));
 357   menu_additem(&load_game_menu,menu_item_create(MN_BACK,"Back",0,0));
 358
 359   menu_init(&save_game_menu);
 360   menu_additem(&save_game_menu,menu_item_create(MN_LABEL,"Save Game",0,0));
 361   menu_additem(&save_game_menu,menu_item_create(MN_HL,"",0,0));
 362   menu_additem(&save_game_menu,menu_item_create(MN_DEACTIVE,"Slot 1",0,0));
 363   menu_additem(&save_game_menu,menu_item_create(MN_DEACTIVE,"Slot 2",0,0));
 364   menu_additem(&save_game_menu,menu_item_create(MN_DEACTIVE,"Slot 3",0,0));
 365   menu_additem(&save_game_menu,menu_item_create(MN_DEACTIVE,"Slot 4",0,0));
 366   menu_additem(&save_game_menu,menu_item_create(MN_DEACTIVE,"Slot 5",0,0));
 367   menu_additem(&save_game_menu,menu_item_create(MN_HL,"",0,0));
 368   menu_additem(&save_game_menu,menu_item_create(MN_BACK,"Back",0,0));
 369
 370   menu_init(&game_menu);
 371   menu_additem(&game_menu,menu_item_create(MN_LABEL,"InGame Menu",0,0));
 372   menu_additem(&game_menu,menu_item_create(MN_HL,"",0,0));
 373   menu_additem(&game_menu,menu_item_create(MN_ACTION,"Return To Game",0,0));
 374   menu_additem(&game_menu,menu_item_create(MN_GOTO,"Save Game",0,&save_game_menu));
 375   menu_additem(&game_menu,menu_item_create(MN_GOTO,"Load Game",0,&load_game_menu));
 376   menu_additem(&game_menu,menu_item_create(MN_GOTO,"Options",0,&options_menu));
 377   menu_additem(&game_menu,menu_item_create(MN_HL,"",0,0));
 378   menu_additem(&game_menu,menu_item_create(MN_ACTION,"Quit Game",0,0));
 379
 380   menu_init(&highscore_menu);
 381   menu_additem(&highscore_menu,menu_item_create(MN_TEXTFIELD,"Enter your name:",0,0));
 382
 383 }
 384
 385 void update_load_save_game_menu(menu_type* pmenu, int load)
 386 {
 387   int i;
 388
 389   for(i = 2; i < 7; ++i)
 390     {
 391       char *tmp;
 392       slotinfo(&tmp,i-1);
 393       if(load && strlen(tmp) == strlen("Slot X - Free") )
 394         pmenu->item[i].kind = MN_DEACTIVE;
 395       else
 396         pmenu->item[i].kind = MN_ACTION;
 397       menu_item_change_text(&pmenu->item[i],tmp);
 398       free(tmp);
 399     }
 400 }
 401
 402 void process_save_load_game_menu(int save)
 403 {
 404   int slot;
 405   switch (slot = menu_check(save ? &save_game_menu : &load_game_menu))
 406     {
 407     default:
 408       if(slot != -1)
 409         {
 410           if(save == YES)
 411             {
 412               savegame(slot - 1);
 413             }
 414           else
 415             {
 416               if(game_started == NO)
 417                 {
 418                   gameloop("default",slot - 1,ST_GL_LOAD_GAME);
 419                   show_menu = YES;
 420                   menu_set_current(&main_menu);
 421                 }
 422               else
 423                 loadgame(slot - 1);
 424             }
 425           st_pause_ticks_stop();
 426         }
 427       break;
 428     }
 429 }
 430
 431 /* Handle changes made to global settings in the options menu. */
 432 void process_options_menu(void)
 433 {
 434   switch (menu_check(&options_menu))
 435     {
 436     case 2:
 437       if(use_fullscreen != options_menu.item[2].toggled)
 438         {
 439           use_fullscreen = !use_fullscreen;
 440           st_video_setup();
 441         }
 442       break;
 443     case 3:
 444       if(use_sound != options_menu.item[3].toggled)
 445         use_sound = !use_sound;
 446       break;
 447     case 4:
 448       if(use_music != options_menu.item[4].toggled)
 449         {
 450           if(use_music == YES)
 451             {
 452               if(playing_music())
 453                 {
 454                   halt_music();
 455                 }
 456               use_music = NO;
 457             }
 458           else
 459             {
 460               use_music = YES;
 461               if (!playing_music())
 462                 {
 463                   play_current_music();
 464                 }
 465             }
 466         }
 467       break;
 468     case 5:
 469       if(show_fps != options_menu.item[5].toggled)
 470         show_fps = !show_fps;
 471       break;
 472     }
 473 }
 474
 475 void st_general_setup(void)
 476 {
 477   /* Seed random number generator: */
 478
 479   srand(SDL_GetTicks());
 480
 481   /* Set icon image: */
 482
 483   seticon();
 484
 485   /* Unicode needed for input handling: */
 486
 487   SDL_EnableUNICODE(1);
 488
 489   /* Load global images: */
 490
 491   text_load(&black_text, datadir + "/images/status/letters-black.png", TEXT_TEXT, 16,18);
 492   text_load(&gold_text,datadir + "/images/status/letters-gold.png", TEXT_TEXT, 16,18);
 493   text_load(&blue_text,datadir + "/images/status/letters-blue.png", TEXT_TEXT, 16,18);
 494   text_load(&red_text,datadir + "/images/status/letters-red.png", TEXT_TEXT, 16,18);
 495   text_load(&white_text,datadir + "/images/status/letters-white.png", TEXT_TEXT, 16,18);
 496   text_load(&white_small_text,datadir + "/images/status/letters-white-small.png", TEXT_TEXT, 8,9);
 497   text_load(&white_big_text,datadir + "/images/status/letters-white-big.png", TEXT_TEXT, 20,23);
 498   text_load(&yellow_nums,datadir + "/images/status/numbers.png", TEXT_NUM, 32,32);
 499
 500   /* Load GUI/menu images: */
 501   texture_load(&checkbox, datadir + "/images/status/checkbox.png", USE_ALPHA);
 502   texture_load(&checkbox_checked, datadir + "/images/status/checkbox-checked.png", USE_ALPHA);
 503   texture_load(&back, datadir + "/images/status/back.png", USE_ALPHA);
 504   texture_load(&arrow_left, datadir + "/images/icons/left.png", USE_ALPHA);
 505   texture_load(&arrow_right, datadir + "/images/icons/right.png", USE_ALPHA);
 506
 507 }
 508
 509 void st_general_free(void)
 510 {
 511
 512   /* Free global images: */
 513
 514   text_free(&black_text);
 515   text_free(&gold_text);
 516   text_free(&white_text);
 517   text_free(&blue_text);
 518   text_free(&red_text);
 519   text_free(&white_small_text);
 520   text_free(&white_big_text);
 521
 522   /* Free GUI/menu images: */
 523   texture_free(&checkbox);
 524   texture_free(&checkbox_checked);
 525   texture_free(&back);
 526   texture_free(&arrow_left);
 527   texture_free(&arrow_right);
 528
 529   /* Free menus */
 530
 531   menu_free(&main_menu);
 532   menu_free(&game_menu);
 533   menu_free(&options_menu);
 534   menu_free(&highscore_menu);
 535   menu_free(&save_game_menu);
 536   menu_free(&load_game_menu);
 537
 538 }
 539
 540 void st_video_setup(void)
 541 {
 542
 543   if(screen != NULL)
 544     SDL_FreeSurface(screen);
 545
 546   /* Init SDL Video: */
 547
 548   if (SDL_Init(SDL_INIT_VIDEO) < 0)
 549     {
 550       fprintf(stderr,
 551               "\nError: I could not initialize video!\n"
 552               "The Simple DirectMedia error that occured was:\n"
 553               "%s\n\n", SDL_GetError());
 554       exit(1);
 555     }
 556
 557   /* Open display: */
 558
 559   if(use_gl)
 560     st_video_setup_gl();
 561   else
 562     st_video_setup_sdl();
 563
 564   texture_setup();
 565
 566   /* Set window manager stuff: */
 567
 568   SDL_WM_SetCaption("Super Tux", "Super Tux");
 569
 570 }
 571
 572 void st_video_setup_sdl(void)
 573 {
 574   SDL_FreeSurface(screen);
 575
 576   if (use_fullscreen == YES)
 577     {
 578       screen = SDL_SetVideoMode(640, 480, 0, SDL_FULLSCREEN ) ; /* | SDL_HWSURFACE); */
 579       if (screen == NULL)
 580         {
 581           fprintf(stderr,
 582                   "\nWarning: I could not set up fullscreen video for "
 583                   "640x480 mode.\n"
 584                   "The Simple DirectMedia error that occured was:\n"
 585                   "%s\n\n", SDL_GetError());
 586           use_fullscreen = NO;
 587         }
 588     }
 589   else
 590     {
 591       screen = SDL_SetVideoMode(640, 480, 0, SDL_HWSURFACE | SDL_DOUBLEBUF );
 592
 593       if (screen == NULL)
 594         {
 595           fprintf(stderr,
 596                   "\nError: I could not set up video for 640x480 mode.\n"
 597                   "The Simple DirectMedia error that occured was:\n"
 598                   "%s\n\n", SDL_GetError());
 599           exit(1);
 600         }
 601     }
 602 }
 603
 604 void st_video_setup_gl(void)
 605 {
 606 #ifndef NOOPENGL
 607
 608   SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 5);
 609   SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 5);
 610   SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 5);
 611   SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
 612   SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
 613
 614   if (use_fullscreen == YES)
 615     {
 616       screen = SDL_SetVideoMode(640, 480, 0, SDL_FULLSCREEN | SDL_OPENGL) ; /* | SDL_HWSURFACE); */
 617       if (screen == NULL)
 618         {
 619           fprintf(stderr,
 620                   "\nWarning: I could not set up fullscreen video for "
 621                   "640x480 mode.\n"
 622                   "The Simple DirectMedia error that occured was:\n"
 623                   "%s\n\n", SDL_GetError());
 624           use_fullscreen = NO;
 625         }
 626     }
 627   else
 628     {
 629       screen = SDL_SetVideoMode(640, 480, 0, SDL_OPENGL);
 630
 631       if (screen == NULL)
 632         {
 633           fprintf(stderr,
 634                   "\nError: I could not set up video for 640x480 mode.\n"
 635                   "The Simple DirectMedia error that occured was:\n"
 636                   "%s\n\n", SDL_GetError());
 637           exit(1);
 638         }
 639     }
 640
 641   /*
 642    * Set up OpenGL for 2D rendering.
 643    */
 644   glDisable(GL_DEPTH_TEST);
 645   glDisable(GL_CULL_FACE);
 646
 647   glViewport(0, 0, screen->w, screen->h);
 648   glMatrixMode(GL_PROJECTION);
 649   glLoadIdentity();
 650   glOrtho(0, screen->w, screen->h, 0, -1.0, 1.0);
 651
 652   glMatrixMode(GL_MODELVIEW);
 653   glLoadIdentity();
 654   glTranslatef(0.0f, 0.0f, 0.0f);
 655
 656 #endif
 657
 658 }
 659
 660 void st_joystick_setup(void)
 661 {
 662
 663   /* Init Joystick: */
 664
 665 #ifdef JOY_YES
 666   use_joystick = YES;
 667
 668   if (SDL_Init(SDL_INIT_JOYSTICK) < 0)
 669     {
 670       fprintf(stderr, "Warning: I could not initialize joystick!\n"
 671               "The Simple DirectMedia error that occured was:\n"
 672               "%s\n\n", SDL_GetError());
 673
 674       use_joystick = NO;
 675     }
 676   else
 677     {
 678       /* Open joystick: */
 679
 680       if (SDL_NumJoysticks() <= 0)
 681         {
 682           fprintf(stderr, "Warning: No joysticks are available.\n");
 683
 684           use_joystick = NO;
 685         }
 686       else
 687         {
 688           js = SDL_JoystickOpen(0);
 689
 690           if (js == NULL)
 691             {
 692               fprintf(stderr, "Warning: Could not open joystick 1.\n"
 693                       "The Simple DirectMedia error that occured was:\n"
 694                       "%s\n\n", SDL_GetError());
 695
 696               use_joystick = NO;
 697             }
 698           else
 699             {
 700               /* Check for proper joystick configuration: */
 701
 702               if (SDL_JoystickNumAxes(js) < 2)
 703                 {
 704                   fprintf(stderr,
 705                           "Warning: Joystick does not have enough axes!\n");
 706
 707                   use_joystick = NO;
 708                 }
 709               else
 710                 {
 711                   if (SDL_JoystickNumButtons(js) < 2)
 712                     {
 713                       fprintf(stderr,
 714                               "Warning: "
 715                               "Joystick does not have enough buttons!\n");
 716
 717                       use_joystick = NO;
 718                     }
 719                 }
 720             }
 721         }
 722     }
 723 #endif
 724
 725 }
 726
 727 void st_audio_setup(void)
 728 {
 729
 730   /* Init SDL Audio silently even if --disable-sound : */
 731
 732   if (audio_device == YES)
 733     {
 734       if (SDL_Init(SDL_INIT_AUDIO) < 0)
 735         {
 736           /* only print out message if sound or music
 737              was not disabled at command-line
 738            */
 739           if (use_sound == YES || use_music == YES)
 740             {
 741               fprintf(stderr,
 742                       "\nWarning: I could not initialize audio!\n"
 743                       "The Simple DirectMedia error that occured was:\n"
 744                       "%s\n\n", SDL_GetError());
 745             }
 746           /* keep the programming logic the same :-)
 747              because in this case, use_sound & use_music' values are ignored
 748              when there's no available audio device
 749           */
 750           use_sound = NO;
 751           use_music = NO;
 752           audio_device = NO;
 753         }
 754     }
 755
 756
 757   /* Open sound silently regarless the value of "use_sound": */
 758
 759   if (audio_device == YES)
 760     {
 761       if (open_audio(44100, AUDIO_S16, 2, 2048) < 0)
 762         {
 763           /* only print out message if sound or music
 764              was not disabled at command-line
 765            */
 766           if ((use_sound == YES) || (use_music == YES))
 767             {
 768               fprintf(stderr,
 769                       "\nWarning: I could not set up audio for 44100 Hz "
 770                       "16-bit stereo.\n"
 771                       "The Simple DirectMedia error that occured was:\n"
 772                       "%s\n\n", SDL_GetError());
 773             }
 774           use_sound = NO;
 775           use_music = NO;
 776           audio_device = NO;
 777         }
 778     }
 779
 780 }
 781
 782
 783 /* --- SHUTDOWN --- */
 784
 785 void st_shutdown(void)
 786 {
 787   close_audio();
 788   SDL_Quit();
 789 }
 790
 791
 792 /* --- ABORT! --- */
 793
 794 void st_abort(const char * reason,const  char * details)
 795 {
 796   fprintf(stderr, "\nError: %s\n%s\n\n", reason, details);
 797   st_shutdown();
 798   exit(1);
 799 }
 800
 801
 802 /* Set Icon (private) */
 803
 804 void seticon(void)
 805 {
 806   int masklen;
 807   Uint8 * mask;
 808   SDL_Surface * icon;
 809
 810
 811   /* Load icon into a surface: */
 812
 813   icon = IMG_Load((datadir + "/images/icon.png").c_str());
 814   if (icon == NULL)
 815     {
 816       fprintf(stderr,
 817               "\nError: I could not load the icon image: %s%s\n"
 818               "The Simple DirectMedia error that occured was:\n"
 819               "%s\n\n", datadir.c_str(), "/images/icon.png", SDL_GetError());
 820       exit(1);
 821     }
 822
 823
 824   /* Create mask: */
 825
 826   masklen = (((icon -> w) + 7) / 8) * (icon -> h);
 827   mask = (Uint8*) malloc(masklen * sizeof(Uint8));
 828   memset(mask, 0xFF, masklen);
 829
 830
 831   /* Set icon: */
 832
 833   SDL_WM_SetIcon(icon, mask);
 834
 835
 836   /* Free icon surface & mask: */
 837
 838   free(mask);
 839   SDL_FreeSurface(icon);
 840 }
 841
 842
 843 /* Parse command-line arguments: */
 844
 845 void parseargs(int argc, char * argv[])
 846 {
 847   int i;
 848
 849   /* Set defaults: */
 850
 851
 852   debug_mode = NO;
 853   use_fullscreen = NO;
 854   show_fps = NO;
 855   use_gl = NO;
 856
 857 #ifndef NOSOUND
 858
 859   use_sound = YES;
 860   use_music = YES;
 861   audio_device = YES;
 862 #else
 863
 864   use_sound = NO;
 865   use_music = NO;
 866   audio_device = NO;
 867 #endif
 868
 869   /* Parse arguments: */
 870
 871   for (i = 1; i < argc; i++)
 872     {
 873       if (strcmp(argv[i], "--fullscreen") == 0 ||
 874           strcmp(argv[i], "-f") == 0)
 875         {
 876           /* Use full screen: */
 877
 878           use_fullscreen = YES;
 879         }
 880       else if (strcmp(argv[i], "--worldmap") == 0)
 881         {
 882           launch_worldmap_mode = true;
 883         }
 884       else if (strcmp(argv[i], "--datadir") == 0
 885                || strcmp(argv[i], "-d") == 0 )
 886         {
 887           assert(i+1 < argc);
 888           datadir = argv[i+1];
 889         }
 890       else if (strcmp(argv[i], "--show-fps") == 0)
 891         {
 892           /* Use full screen: */
 893
 894           show_fps = YES;
 895         }
 896       else if (strcmp(argv[i], "--opengl") == 0 ||
 897                strcmp(argv[i], "-gl") == 0)
 898         {
 899 #ifndef NOOPENGL
 900           /* Use OpengGL: */
 901
 902           use_gl = YES;
 903 #endif
 904
 905         }
 906       else if (strcmp(argv[i], "--usage") == 0)
 907         {
 908           /* Show usage: */
 909
 910           usage(argv[0], 0);
 911         }
 912       else if (strcmp(argv[i], "--version") == 0)
 913         {
 914           /* Show version: */
 915
 916           printf("Super Tux - version " VERSION "\n");
 917           exit(0);
 918         }
 919       else if (strcmp(argv[i], "--disable-sound") == 0)
 920         {
 921           /* Disable the compiled in sound feature */
 922 #ifndef NOSOUND
 923           printf("Sounds disabled \n");
 924           use_sound = NO;
 925 #else
 926
 927           printf("Warning: Sound capability has not been compiled into this build.\n");
 928 #endif
 929
 930         }
 931       else if (strcmp(argv[i], "--disable-music") == 0)
 932         {
 933           /* Disable the compiled in sound feature */
 934 #ifndef NOSOUND
 935           printf("Music disabled \n");
 936           use_music = NO;
 937 #else
 938
 939           printf("Warning: Music feature is not compiled in \n");
 940 #endif
 941
 942         }
 943       else if (strcmp(argv[i], "--debug-mode") == 0)
 944         {
 945           /* Enable the debug-mode */
 946           debug_mode = YES;
 947
 948         }
 949       else if (strcmp(argv[i], "--help") == 0)
 950         {         /* Show help: */
 951           puts("Super Tux " VERSION "\n"
 952                "  Please see the file \"README.txt\" for more details.\n");
 953           printf("Usage: %s [OPTIONS] FILENAME\n\n", argv[0]);
 954           puts("Display Options:\n"
 955                "  --fullscreen      Run in fullscreen mode.\n"
 956                "  --opengl          If opengl support was compiled in, this will enable\n"
 957                "                    the EXPERIMENTAL OpenGL mode.\n"
 958                "\n"
 959                "Sound Options:\n"
 960                "  --disable-sound   If sound support was compiled in,  this will\n"
 961                "                    disable sound for this session of the game.\n"
 962                "  --disable-music   Like above, but this will disable music.\n"
 963                "\n"
 964                "Misc Options:\n"
 965                "  --worldmap        Start in worldmap-mode (EXPERIMENTAL)\n"
 966                "  -d, --datadir DIR Load Game data from DIR (default: automatic)\n"
 967                "  --debug-mode      Enables the debug-mode, which is useful for developers.\n"
 968                "  --help            Display a help message summarizing command-line\n"
 969                "                    options, license and game controls.\n"
 970                "  --usage           Display a brief message summarizing command-line options.\n"
 971                "  --version         Display the version of SuperTux you're running.\n\n"
 972                );
 973           exit(0);
 974         }
 975       else if (argv[i][0] != '-')
 976         {
 977           level_startup_file = argv[i];
 978         }
 979       else
 980         {
 981           /* Unknown - complain! */
 982
 983           usage(argv[0], 1);
 984         }
 985     }
 986 }
 987
 988
 989 /* Display usage: */
 990
 991 void usage(char * prog, int ret)
 992 {
 993   FILE * fi;
 994
 995
 996   /* Determine which stream to write to: */
 997
 998   if (ret == 0)
 999     fi = stdout;
1000   else
1001     fi = stderr;
1002
1003
1004   /* Display the usage message: */
1005
1006   fprintf(fi, "Usage: %s [--fullscreen] [--opengl] [--disable-sound] [--disable-music] [--debug-mode] | [--usage | --help | --version] [--worldmap] FILENAME\n",
1007           prog);
1008
1009
1010   /* Quit! */
1011
1012   exit(ret);
1013 }
1014