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/", DATA_PREFIX, 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",DATA_PREFIX,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",DATA_PREFIX,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         }
 297       else
 298         {
 299           std::string exedir = std::string(dirname(exe_file)) + "/";
 300
 301           datadir = exedir + "../data/"; // SuperTux run from source dir
 302           if (access(datadir.c_str(), F_OK) != 0)
 303             {
 304               datadir = exedir + "../share/supertux/"; // SuperTux run from PATH
 305               if (access(datadir.c_str(), F_OK) != 0)
 306                 { // If all fails, fall back to compiled path
 307                   datadir = DATA_PREFIX;
 308                 }
 309             }
 310         }
 311     }
 312   printf("Datadir: %s\n", datadir.c_str());
 313 }
 314
 315 /* Create and setup menus. */
 316 void st_menu(void)
 317 {
 318   menu_init(&main_menu);
 319   menu_additem(&main_menu,menu_item_create(MN_LABEL,"Main Menu",0,0));
 320   menu_additem(&main_menu,menu_item_create(MN_HL,"",0,0));
 321   menu_additem(&main_menu,menu_item_create(MN_ACTION,"Start Game",0,0));
 322   menu_additem(&main_menu,menu_item_create(MN_GOTO,"Load Game",0,&load_game_menu));
 323   menu_additem(&main_menu,menu_item_create(MN_GOTO,"Options",0,&options_menu));
 324   menu_additem(&main_menu,menu_item_create(MN_ACTION,"Level editor",0,0));
 325   menu_additem(&main_menu,menu_item_create(MN_ACTION,"Credits",0,0));
 326   menu_additem(&main_menu,menu_item_create(MN_HL,"",0,0));
 327   menu_additem(&main_menu,menu_item_create(MN_ACTION,"Quit",0,0));
 328
 329   menu_init(&options_menu);
 330   menu_additem(&options_menu,menu_item_create(MN_LABEL,"Options",0,0));
 331   menu_additem(&options_menu,menu_item_create(MN_HL,"",0,0));
 332   menu_additem(&options_menu,menu_item_create(MN_TOGGLE,"Fullscreen",use_fullscreen,0));
 333   if(audio_device == YES)
 334     {
 335       menu_additem(&options_menu,menu_item_create(MN_TOGGLE,"Sound     ",use_sound,0));
 336       menu_additem(&options_menu,menu_item_create(MN_TOGGLE,"Music     ",use_music,0));
 337     }
 338   else
 339     {
 340       menu_additem(&options_menu,menu_item_create(MN_DEACTIVE,"Sound     ",use_sound,0));
 341       menu_additem(&options_menu,menu_item_create(MN_DEACTIVE,"Music     ",use_music,0));
 342     }
 343   menu_additem(&options_menu,menu_item_create(MN_TOGGLE,"Show FPS  ",show_fps,0));
 344   menu_additem(&options_menu,menu_item_create(MN_HL,"",0,0));
 345   menu_additem(&options_menu,menu_item_create(MN_BACK,"Back",0,0));
 346
 347   menu_init(&load_game_menu);
 348   menu_additem(&load_game_menu,menu_item_create(MN_LABEL,"Load Game",0,0));
 349   menu_additem(&load_game_menu,menu_item_create(MN_HL,"",0,0));
 350   menu_additem(&load_game_menu,menu_item_create(MN_DEACTIVE,"Slot 1",0,0));
 351   menu_additem(&load_game_menu,menu_item_create(MN_DEACTIVE,"Slot 2",0,0));
 352   menu_additem(&load_game_menu,menu_item_create(MN_DEACTIVE,"Slot 3",0,0));
 353   menu_additem(&load_game_menu,menu_item_create(MN_DEACTIVE,"Slot 4",0,0));
 354   menu_additem(&load_game_menu,menu_item_create(MN_DEACTIVE,"Slot 5",0,0));
 355   menu_additem(&load_game_menu,menu_item_create(MN_HL,"",0,0));
 356   menu_additem(&load_game_menu,menu_item_create(MN_BACK,"Back",0,0));
 357
 358   menu_init(&save_game_menu);
 359   menu_additem(&save_game_menu,menu_item_create(MN_LABEL,"Save Game",0,0));
 360   menu_additem(&save_game_menu,menu_item_create(MN_HL,"",0,0));
 361   menu_additem(&save_game_menu,menu_item_create(MN_DEACTIVE,"Slot 1",0,0));
 362   menu_additem(&save_game_menu,menu_item_create(MN_DEACTIVE,"Slot 2",0,0));
 363   menu_additem(&save_game_menu,menu_item_create(MN_DEACTIVE,"Slot 3",0,0));
 364   menu_additem(&save_game_menu,menu_item_create(MN_DEACTIVE,"Slot 4",0,0));
 365   menu_additem(&save_game_menu,menu_item_create(MN_DEACTIVE,"Slot 5",0,0));
 366   menu_additem(&save_game_menu,menu_item_create(MN_HL,"",0,0));
 367   menu_additem(&save_game_menu,menu_item_create(MN_BACK,"Back",0,0));
 368
 369   menu_init(&game_menu);
 370   menu_additem(&game_menu,menu_item_create(MN_LABEL,"InGame Menu",0,0));
 371   menu_additem(&game_menu,menu_item_create(MN_HL,"",0,0));
 372   menu_additem(&game_menu,menu_item_create(MN_ACTION,"Return To Game",0,0));
 373   menu_additem(&game_menu,menu_item_create(MN_GOTO,"Save Game",0,&save_game_menu));
 374   menu_additem(&game_menu,menu_item_create(MN_GOTO,"Load Game",0,&load_game_menu));
 375   menu_additem(&game_menu,menu_item_create(MN_GOTO,"Options",0,&options_menu));
 376   menu_additem(&game_menu,menu_item_create(MN_HL,"",0,0));
 377   menu_additem(&game_menu,menu_item_create(MN_ACTION,"Quit Game",0,0));
 378
 379   menu_init(&highscore_menu);
 380   menu_additem(&highscore_menu,menu_item_create(MN_TEXTFIELD,"Enter your name:",0,0));
 381
 382 }
 383
 384 void update_load_save_game_menu(menu_type* pmenu, int load)
 385 {
 386   int i;
 387
 388   for(i = 2; i < 7; ++i)
 389     {
 390       char *tmp;
 391       slotinfo(&tmp,i-1);
 392       if(load && strlen(tmp) == strlen("Slot X - Free") )
 393         pmenu->item[i].kind = MN_DEACTIVE;
 394       else
 395         pmenu->item[i].kind = MN_ACTION;
 396       menu_item_change_text(&pmenu->item[i],tmp);
 397       free(tmp);
 398     }
 399 }
 400
 401 void process_save_load_game_menu(int save)
 402 {
 403   int slot;
 404   switch (slot = menu_check(save ? &save_game_menu : &load_game_menu))
 405     {
 406     default:
 407       if(slot != -1)
 408         {
 409           if(save == YES)
 410             {
 411               savegame(slot - 1);
 412             }
 413           else
 414             {
 415               if(game_started == NO)
 416                 {
 417                   gameloop("default",slot - 1,ST_GL_LOAD_GAME);
 418                   show_menu = YES;
 419                   menu_set_current(&main_menu);
 420                 }
 421               else
 422                 loadgame(slot - 1);
 423             }
 424           st_pause_ticks_stop();
 425         }
 426       break;
 427     }
 428 }
 429
 430 /* Handle changes made to global settings in the options menu. */
 431 void process_options_menu(void)
 432 {
 433   switch (menu_check(&options_menu))
 434     {
 435     case 2:
 436       if(use_fullscreen != options_menu.item[2].toggled)
 437         {
 438           use_fullscreen = !use_fullscreen;
 439           st_video_setup();
 440         }
 441       break;
 442     case 3:
 443       if(use_sound != options_menu.item[3].toggled)
 444         use_sound = !use_sound;
 445       break;
 446     case 4:
 447       if(use_music != options_menu.item[4].toggled)
 448         {
 449           if(use_music == YES)
 450             {
 451               if(playing_music())
 452                 {
 453                   halt_music();
 454                 }
 455               use_music = NO;
 456             }
 457           else
 458             {
 459               use_music = YES;
 460               if (!playing_music())
 461                 {
 462                   play_current_music();
 463                 }
 464             }
 465         }
 466       break;
 467     case 5:
 468       if(show_fps != options_menu.item[5].toggled)
 469         show_fps = !show_fps;
 470       break;
 471     }
 472 }
 473
 474 void st_general_setup(void)
 475 {
 476   /* Seed random number generator: */
 477
 478   srand(SDL_GetTicks());
 479
 480   /* Set icon image: */
 481
 482   seticon();
 483
 484   /* Unicode needed for input handling: */
 485
 486   SDL_EnableUNICODE(1);
 487
 488   /* Load global images: */
 489
 490   text_load(&black_text,DATA_PREFIX "/images/status/letters-black.png", TEXT_TEXT, 16,18);
 491   text_load(&gold_text,DATA_PREFIX "/images/status/letters-gold.png", TEXT_TEXT, 16,18);
 492   text_load(&blue_text,DATA_PREFIX "/images/status/letters-blue.png", TEXT_TEXT, 16,18);
 493   text_load(&red_text,DATA_PREFIX "/images/status/letters-red.png", TEXT_TEXT, 16,18);
 494   text_load(&white_text,DATA_PREFIX "/images/status/letters-white.png", TEXT_TEXT, 16,18);
 495   text_load(&white_small_text,DATA_PREFIX "/images/status/letters-white-small.png", TEXT_TEXT, 8,9);
 496   text_load(&white_big_text,DATA_PREFIX "/images/status/letters-white-big.png", TEXT_TEXT, 20,23);
 497   text_load(&yellow_nums,DATA_PREFIX "/images/status/numbers.png", TEXT_NUM, 32,32);
 498
 499   /* Load GUI/menu images: */
 500   texture_load(&checkbox, DATA_PREFIX "/images/status/checkbox.png", USE_ALPHA);
 501   texture_load(&checkbox_checked, DATA_PREFIX "/images/status/checkbox-checked.png", USE_ALPHA);
 502   texture_load(&back, DATA_PREFIX "/images/status/back.png", USE_ALPHA);
 503   texture_load(&arrow_left, DATA_PREFIX "/images/icons/left.png", USE_ALPHA);
 504   texture_load(&arrow_right, DATA_PREFIX "/images/icons/right.png", USE_ALPHA);
 505
 506 }
 507
 508 void st_general_free(void)
 509 {
 510
 511   /* Free global images: */
 512
 513   text_free(&black_text);
 514   text_free(&gold_text);
 515   text_free(&white_text);
 516   text_free(&blue_text);
 517   text_free(&red_text);
 518   text_free(&white_small_text);
 519   text_free(&white_big_text);
 520
 521   /* Free GUI/menu images: */
 522   texture_free(&checkbox);
 523   texture_free(&checkbox_checked);
 524   texture_free(&back);
 525   texture_free(&arrow_left);
 526   texture_free(&arrow_right);
 527
 528   /* Free menus */
 529
 530   menu_free(&main_menu);
 531   menu_free(&game_menu);
 532   menu_free(&options_menu);
 533   menu_free(&highscore_menu);
 534   menu_free(&save_game_menu);
 535   menu_free(&load_game_menu);
 536
 537 }
 538
 539 void st_video_setup(void)
 540 {
 541
 542   if(screen != NULL)
 543     SDL_FreeSurface(screen);
 544
 545   /* Init SDL Video: */
 546
 547   if (SDL_Init(SDL_INIT_VIDEO) < 0)
 548     {
 549       fprintf(stderr,
 550               "\nError: I could not initialize video!\n"
 551               "The Simple DirectMedia error that occured was:\n"
 552               "%s\n\n", SDL_GetError());
 553       exit(1);
 554     }
 555
 556   /* Open display: */
 557
 558   if(use_gl)
 559     st_video_setup_gl();
 560   else
 561     st_video_setup_sdl();
 562
 563   texture_setup();
 564
 565   /* Set window manager stuff: */
 566
 567   SDL_WM_SetCaption("Super Tux", "Super Tux");
 568
 569 }
 570
 571 void st_video_setup_sdl(void)
 572 {
 573   SDL_FreeSurface(screen);
 574
 575   if (use_fullscreen == YES)
 576     {
 577       screen = SDL_SetVideoMode(640, 480, 0, SDL_FULLSCREEN ) ; /* | SDL_HWSURFACE); */
 578       if (screen == NULL)
 579         {
 580           fprintf(stderr,
 581                   "\nWarning: I could not set up fullscreen video for "
 582                   "640x480 mode.\n"
 583                   "The Simple DirectMedia error that occured was:\n"
 584                   "%s\n\n", SDL_GetError());
 585           use_fullscreen = NO;
 586         }
 587     }
 588   else
 589     {
 590       screen = SDL_SetVideoMode(640, 480, 0, SDL_HWSURFACE | SDL_DOUBLEBUF );
 591
 592       if (screen == NULL)
 593         {
 594           fprintf(stderr,
 595                   "\nError: I could not set up video for 640x480 mode.\n"
 596                   "The Simple DirectMedia error that occured was:\n"
 597                   "%s\n\n", SDL_GetError());
 598           exit(1);
 599         }
 600     }
 601 }
 602
 603 void st_video_setup_gl(void)
 604 {
 605 #ifndef NOOPENGL
 606
 607   SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 5);
 608   SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 5);
 609   SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 5);
 610   SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
 611   SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
 612
 613   if (use_fullscreen == YES)
 614     {
 615       screen = SDL_SetVideoMode(640, 480, 0, SDL_FULLSCREEN | SDL_OPENGL) ; /* | SDL_HWSURFACE); */
 616       if (screen == NULL)
 617         {
 618           fprintf(stderr,
 619                   "\nWarning: I could not set up fullscreen video for "
 620                   "640x480 mode.\n"
 621                   "The Simple DirectMedia error that occured was:\n"
 622                   "%s\n\n", SDL_GetError());
 623           use_fullscreen = NO;
 624         }
 625     }
 626   else
 627     {
 628       screen = SDL_SetVideoMode(640, 480, 0, SDL_OPENGL);
 629
 630       if (screen == NULL)
 631         {
 632           fprintf(stderr,
 633                   "\nError: I could not set up video for 640x480 mode.\n"
 634                   "The Simple DirectMedia error that occured was:\n"
 635                   "%s\n\n", SDL_GetError());
 636           exit(1);
 637         }
 638     }
 639
 640   /*
 641    * Set up OpenGL for 2D rendering.
 642    */
 643   glDisable(GL_DEPTH_TEST);
 644   glDisable(GL_CULL_FACE);
 645
 646   glViewport(0, 0, screen->w, screen->h);
 647   glMatrixMode(GL_PROJECTION);
 648   glLoadIdentity();
 649   glOrtho(0, screen->w, screen->h, 0, -1.0, 1.0);
 650
 651   glMatrixMode(GL_MODELVIEW);
 652   glLoadIdentity();
 653   glTranslatef(0.0f, 0.0f, 0.0f);
 654
 655 #endif
 656
 657 }
 658
 659 void st_joystick_setup(void)
 660 {
 661
 662   /* Init Joystick: */
 663
 664 #ifdef JOY_YES
 665   use_joystick = YES;
 666
 667   if (SDL_Init(SDL_INIT_JOYSTICK) < 0)
 668     {
 669       fprintf(stderr, "Warning: I could not initialize joystick!\n"
 670               "The Simple DirectMedia error that occured was:\n"
 671               "%s\n\n", SDL_GetError());
 672
 673       use_joystick = NO;
 674     }
 675   else
 676     {
 677       /* Open joystick: */
 678
 679       if (SDL_NumJoysticks() <= 0)
 680         {
 681           fprintf(stderr, "Warning: No joysticks are available.\n");
 682
 683           use_joystick = NO;
 684         }
 685       else
 686         {
 687           js = SDL_JoystickOpen(0);
 688
 689           if (js == NULL)
 690             {
 691               fprintf(stderr, "Warning: Could not open joystick 1.\n"
 692                       "The Simple DirectMedia error that occured was:\n"
 693                       "%s\n\n", SDL_GetError());
 694
 695               use_joystick = NO;
 696             }
 697           else
 698             {
 699               /* Check for proper joystick configuration: */
 700
 701               if (SDL_JoystickNumAxes(js) < 2)
 702                 {
 703                   fprintf(stderr,
 704                           "Warning: Joystick does not have enough axes!\n");
 705
 706                   use_joystick = NO;
 707                 }
 708               else
 709                 {
 710                   if (SDL_JoystickNumButtons(js) < 2)
 711                     {
 712                       fprintf(stderr,
 713                               "Warning: "
 714                               "Joystick does not have enough buttons!\n");
 715
 716                       use_joystick = NO;
 717                     }
 718                 }
 719             }
 720         }
 721     }
 722 #endif
 723
 724 }
 725
 726 void st_audio_setup(void)
 727 {
 728
 729   /* Init SDL Audio silently even if --disable-sound : */
 730
 731   if (audio_device == YES)
 732     {
 733       if (SDL_Init(SDL_INIT_AUDIO) < 0)
 734         {
 735           /* only print out message if sound or music
 736              was not disabled at command-line
 737            */
 738           if (use_sound == YES || use_music == YES)
 739             {
 740               fprintf(stderr,
 741                       "\nWarning: I could not initialize audio!\n"
 742                       "The Simple DirectMedia error that occured was:\n"
 743                       "%s\n\n", SDL_GetError());
 744             }
 745           /* keep the programming logic the same :-)
 746              because in this case, use_sound & use_music' values are ignored
 747              when there's no available audio device
 748           */
 749           use_sound = NO;
 750           use_music = NO;
 751           audio_device = NO;
 752         }
 753     }
 754
 755
 756   /* Open sound silently regarless the value of "use_sound": */
 757
 758   if (audio_device == YES)
 759     {
 760       if (open_audio(44100, AUDIO_S16, 2, 2048) < 0)
 761         {
 762           /* only print out message if sound or music
 763              was not disabled at command-line
 764            */
 765           if ((use_sound == YES) || (use_music == YES))
 766             {
 767               fprintf(stderr,
 768                       "\nWarning: I could not set up audio for 44100 Hz "
 769                       "16-bit stereo.\n"
 770                       "The Simple DirectMedia error that occured was:\n"
 771                       "%s\n\n", SDL_GetError());
 772             }
 773           use_sound = NO;
 774           use_music = NO;
 775           audio_device = NO;
 776         }
 777     }
 778
 779 }
 780
 781
 782 /* --- SHUTDOWN --- */
 783
 784 void st_shutdown(void)
 785 {
 786   close_audio();
 787   SDL_Quit();
 788 }
 789
 790
 791 /* --- ABORT! --- */
 792
 793 void st_abort(const char * reason,const  char * details)
 794 {
 795   fprintf(stderr, "\nError: %s\n%s\n\n", reason, details);
 796   st_shutdown();
 797   exit(1);
 798 }
 799
 800
 801 /* Set Icon (private) */
 802
 803 void seticon(void)
 804 {
 805   int masklen;
 806   Uint8 * mask;
 807   SDL_Surface * icon;
 808
 809
 810   /* Load icon into a surface: */
 811
 812   icon = IMG_Load(DATA_PREFIX "/images/icon.png");
 813   if (icon == NULL)
 814     {
 815       fprintf(stderr,
 816               "\nError: I could not load the icon image: %s\n"
 817               "The Simple DirectMedia error that occured was:\n"
 818               "%s\n\n", DATA_PREFIX "/images/icon.png", SDL_GetError());
 819       exit(1);
 820     }
 821
 822
 823   /* Create mask: */
 824
 825   masklen = (((icon -> w) + 7) / 8) * (icon -> h);
 826   mask = (Uint8*) malloc(masklen * sizeof(Uint8));
 827   memset(mask, 0xFF, masklen);
 828
 829
 830   /* Set icon: */
 831
 832   SDL_WM_SetIcon(icon, mask);
 833
 834
 835   /* Free icon surface & mask: */
 836
 837   free(mask);
 838   SDL_FreeSurface(icon);
 839 }
 840
 841
 842 /* Parse command-line arguments: */
 843
 844 void parseargs(int argc, char * argv[])
 845 {
 846   int i;
 847
 848   /* Set defaults: */
 849
 850
 851   debug_mode = NO;
 852   use_fullscreen = NO;
 853   show_fps = NO;
 854   use_gl = NO;
 855
 856 #ifndef NOSOUND
 857
 858   use_sound = YES;
 859   use_music = YES;
 860   audio_device = YES;
 861 #else
 862
 863   use_sound = NO;
 864   use_music = NO;
 865   audio_device = NO;
 866 #endif
 867
 868   /* Parse arguments: */
 869
 870   for (i = 1; i < argc; i++)
 871     {
 872       if (strcmp(argv[i], "--fullscreen") == 0 ||
 873           strcmp(argv[i], "-f") == 0)
 874         {
 875           /* Use full screen: */
 876
 877           use_fullscreen = YES;
 878         }
 879       else if (strcmp(argv[i], "--worldmap") == 0)
 880         {
 881           launch_worldmap_mode = true;
 882         }
 883       else if (strcmp(argv[i], "--datadir") == 0
 884                || strcmp(argv[i], "-d") == 0 )
 885         {
 886           assert(i+1 < argc);
 887           datadir = argv[i+1];
 888         }
 889       else if (strcmp(argv[i], "--show-fps") == 0)
 890         {
 891           /* Use full screen: */
 892
 893           show_fps = YES;
 894         }
 895       else if (strcmp(argv[i], "--opengl") == 0 ||
 896                strcmp(argv[i], "-gl") == 0)
 897         {
 898 #ifndef NOOPENGL
 899           /* Use OpengGL: */
 900
 901           use_gl = YES;
 902 #endif
 903
 904         }
 905       else if (strcmp(argv[i], "--usage") == 0)
 906         {
 907           /* Show usage: */
 908
 909           usage(argv[0], 0);
 910         }
 911       else if (strcmp(argv[i], "--version") == 0)
 912         {
 913           /* Show version: */
 914
 915           printf("Super Tux - version " VERSION "\n");
 916           exit(0);
 917         }
 918       else if (strcmp(argv[i], "--disable-sound") == 0)
 919         {
 920           /* Disable the compiled in sound feature */
 921 #ifndef NOSOUND
 922           printf("Sounds disabled \n");
 923           use_sound = NO;
 924 #else
 925
 926           printf("Warning: Sound capability has not been compiled into this build.\n");
 927 #endif
 928
 929         }
 930       else if (strcmp(argv[i], "--disable-music") == 0)
 931         {
 932           /* Disable the compiled in sound feature */
 933 #ifndef NOSOUND
 934           printf("Music disabled \n");
 935           use_music = NO;
 936 #else
 937
 938           printf("Warning: Music feature is not compiled in \n");
 939 #endif
 940
 941         }
 942       else if (strcmp(argv[i], "--debug-mode") == 0)
 943         {
 944           /* Enable the debug-mode */
 945           debug_mode = YES;
 946
 947         }
 948       else if (strcmp(argv[i], "--help") == 0)
 949         {         /* Show help: */
 950           puts("Super Tux " VERSION "\n"
 951                "  Please see the file \"README.txt\" for more details.\n");
 952           printf("Usage: %s [OPTIONS] FILENAME\n\n", argv[0]);
 953           puts("Display Options:\n"
 954                "  --fullscreen      Run in fullscreen mode.\n"
 955                "  --opengl          If opengl support was compiled in, this will enable\n"
 956                "                    the EXPERIMENTAL OpenGL mode.\n"
 957                "\n"
 958                "Sound Options:\n"
 959                "  --disable-sound   If sound support was compiled in,  this will\n"
 960                "                    disable sound for this session of the game.\n"
 961                "  --disable-music   Like above, but this will disable music.\n"
 962                "\n"
 963                "Misc Options:\n"
 964                "  --worldmap        Start in worldmap-mode (EXPERIMENTAL)\n"
 965                "  -d, --datadir DIR Load Game data from DIR (default: automatic)\n"
 966                "  --debug-mode      Enables the debug-mode, which is useful for developers.\n"
 967                "  --help            Display a help message summarizing command-line\n"
 968                "                    options, license and game controls.\n"
 969                "  --usage           Display a brief message summarizing command-line options.\n"
 970                "  --version         Display the version of SuperTux you're running.\n\n"
 971                );
 972           exit(0);
 973         }
 974       else if (argv[i][0] != '-')
 975         {
 976           level_startup_file = argv[i];
 977         }
 978       else
 979         {
 980           /* Unknown - complain! */
 981
 982           usage(argv[0], 1);
 983         }
 984     }
 985 }
 986
 987
 988 /* Display usage: */
 989
 990 void usage(char * prog, int ret)
 991 {
 992   FILE * fi;
 993
 994
 995   /* Determine which stream to write to: */
 996
 997   if (ret == 0)
 998     fi = stdout;
 999   else
1000     fi = stderr;
1001
1002
1003   /* Display the usage message: */
1004
1005   fprintf(fi, "Usage: %s [--fullscreen] [--opengl] [--disable-sound] [--disable-music] [--debug-mode] | [--usage | --help | --version] [--worldmap] FILENAME\n",
1006           prog);
1007
1008
1009   /* Quit! */
1010
1011   exit(ret);
1012 }
1013