src/setup.c

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