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 #include <sys/stat.h>
  26 #include <sys/types.h>
  27 #include <dirent.h>
  28 #ifndef WIN32
  29 #include <libgen.h>
  30 #endif
  31 #include <ctype.h>
  32
  33 #include "defines.h"
  34 #include "globals.h"
  35 #include "setup.h"
  36 #include "screen.h"
  37 #include "texture.h"
  38 #include "menu.h"
  39 #include "gameloop.h"
  40
  41 #ifdef WIN32
  42 #define mkdir(dir, mode)    mkdir(dir)
  43 // on win32 we typically don't want LFS paths
  44 #undef DATA_PREFIX
  45 #define DATA_PREFIX "./data"
  46 #endif
  47
  48 /* Local function prototypes: */
  49
  50 void seticon(void);
  51 void usage(char * prog, int ret);
  52
  53 /* Does the given file exist and is it accessible? */
  54 int faccessible(const char *filename)
  55 {
  56   struct stat filestat;
  57   if (stat(filename, &filestat) == -1)
  58     {
  59       return false;
  60     }
  61   else
  62     {
  63       if(S_ISREG(filestat.st_mode))
  64         return true;
  65       else
  66         return false;
  67     }
  68 }
  69
  70 /* Can we write to this location? */
  71 int fwriteable(const char *filename)
  72 {
  73   FILE* fi;
  74   fi = fopen(filename, "wa");
  75   if (fi == NULL)
  76     {
  77       return false;
  78     }
  79   return true;
  80 }
  81
  82 /* Makes sure a directory is created in either the SuperTux base directory or the SuperTux base directory.*/
  83 int fcreatedir(const char* relative_dir)
  84 {
  85   char path[1024];
  86   snprintf(path, 1024, "%s/%s/", st_dir, relative_dir);
  87   if(mkdir(path,0755) != 0)
  88     {
  89       snprintf(path, 1024, "%s/%s/", datadir.c_str(), relative_dir);
  90       if(mkdir(path,0755) != 0)
  91         {
  92           return false;
  93         }
  94       else
  95         {
  96           return true;
  97         }
  98     }
  99   else
 100     {
 101       return true;
 102     }
 103 }
 104
 105 /* Get all names of sub-directories in a certain directory. */
 106 /* Returns the number of sub-directories found. */
 107 /* Note: The user has to free the allocated space. */
 108 string_list_type dsubdirs(const char *rel_path,const  char* expected_file)
 109 {
 110   DIR *dirStructP;
 111   struct dirent *direntp;
 112   string_list_type sdirs;
 113   char filename[1024];
 114   char path[1024];
 115
 116   string_list_init(&sdirs);
 117   sprintf(path,"%s/%s",st_dir,rel_path);
 118   if((dirStructP = opendir(path)) != NULL)
 119     {
 120       while((direntp = readdir(dirStructP)) != NULL)
 121         {
 122           char absolute_filename[1024];
 123           struct stat buf;
 124
 125           sprintf(absolute_filename, "%s/%s", path, direntp->d_name);
 126
 127           if (stat(absolute_filename, &buf) == 0 && S_ISDIR(buf.st_mode))
 128             {
 129               if(expected_file != NULL)
 130                 {
 131                   sprintf(filename,"%s/%s/%s",path,direntp->d_name,expected_file);
 132                   if(!faccessible(filename))
 133                     continue;
 134                 }
 135
 136               string_list_add_item(&sdirs,direntp->d_name);
 137             }
 138         }
 139       closedir(dirStructP);
 140     }
 141
 142   sprintf(path,"%s/%s",datadir.c_str(),rel_path);
 143   if((dirStructP = opendir(path)) != NULL)
 144     {
 145       while((direntp = readdir(dirStructP)) != NULL)
 146         {
 147           char absolute_filename[1024];
 148           struct stat buf;
 149
 150           sprintf(absolute_filename, "%s/%s", path, direntp->d_name);
 151
 152           if (stat(absolute_filename, &buf) == 0 && S_ISDIR(buf.st_mode))
 153             {
 154               if(expected_file != NULL)
 155                 {
 156                   sprintf(filename,"%s/%s/%s",path,direntp->d_name,expected_file);
 157                   if(!faccessible(filename))
 158                     {
 159                       continue;
 160                     }
 161                   else
 162                     {
 163                       sprintf(filename,"%s/%s/%s/%s",st_dir,rel_path,direntp->d_name,expected_file);
 164                       if(faccessible(filename))
 165                         continue;
 166                     }
 167                 }
 168
 169               string_list_add_item(&sdirs,direntp->d_name);
 170             }
 171         }
 172       closedir(dirStructP);
 173     }
 174
 175   return sdirs;
 176 }
 177
 178 string_list_type dfiles(const char *rel_path, const  char* glob, const  char* exception_str)
 179 {
 180   DIR *dirStructP;
 181   struct dirent *direntp;
 182   string_list_type sdirs;
 183   char path[1024];
 184
 185   string_list_init(&sdirs);
 186   sprintf(path,"%s/%s",st_dir,rel_path);
 187   if((dirStructP = opendir(path)) != NULL)
 188     {
 189       while((direntp = readdir(dirStructP)) != NULL)
 190         {
 191           char absolute_filename[1024];
 192           struct stat buf;
 193
 194           sprintf(absolute_filename, "%s/%s", path, direntp->d_name);
 195
 196           if (stat(absolute_filename, &buf) == 0 && S_ISREG(buf.st_mode))
 197             {
 198               if(exception_str != NULL)
 199                 {
 200                   if(strstr(direntp->d_name,exception_str) != NULL)
 201                     continue;
 202                 }
 203               if(glob != NULL)
 204                 if(strstr(direntp->d_name,glob) == NULL)
 205                   continue;
 206
 207               string_list_add_item(&sdirs,direntp->d_name);
 208             }
 209         }
 210       closedir(dirStructP);
 211     }
 212
 213   sprintf(path,"%s/%s",datadir.c_str(),rel_path);
 214   if((dirStructP = opendir(path)) != NULL)
 215     {
 216       while((direntp = readdir(dirStructP)) != NULL)
 217         {
 218           char absolute_filename[1024];
 219           struct stat buf;
 220
 221           sprintf(absolute_filename, "%s/%s", path, direntp->d_name);
 222
 223           if (stat(absolute_filename, &buf) == 0 && S_ISREG(buf.st_mode))
 224             {
 225               if(exception_str != NULL)
 226                 {
 227                   if(strstr(direntp->d_name,exception_str) != NULL)
 228                     continue;
 229                 }
 230               if(glob != NULL)
 231                 if(strstr(direntp->d_name,glob) == NULL)
 232                   continue;
 233
 234               string_list_add_item(&sdirs,direntp->d_name);
 235             }
 236         }
 237       closedir(dirStructP);
 238     }
 239
 240   return sdirs;
 241 }
 242
 243 void free_strings(char **strings, int num)
 244 {
 245   int i;
 246   for(i=0; i < num; ++i)
 247     free(strings[i]);
 248 }
 249
 250 /* --- SETUP --- */
 251 /* Set SuperTux configuration and save directories */
 252 void st_directory_setup(void)
 253 {
 254   char *home;
 255   char str[1024];
 256   /* Get home directory (from $HOME variable)... if we can't determine it,
 257      use the current directory ("."): */
 258   if (getenv("HOME") != NULL)
 259     home = getenv("HOME");
 260   else
 261     home = ".";
 262
 263   st_dir = (char *) malloc(sizeof(char) * (strlen(home) +
 264                                            strlen("/.supertux") + 1));
 265   strcpy(st_dir, home);
 266   strcat(st_dir, "/.supertux");
 267
 268   /* Remove .supertux config-file from old SuperTux versions */
 269   if(faccessible(st_dir))
 270     {
 271       remove
 272         (st_dir);
 273     }
 274
 275   st_save_dir = (char *) malloc(sizeof(char) * (strlen(st_dir) + strlen("/save") + 1));
 276
 277   strcpy(st_save_dir,st_dir);
 278   strcat(st_save_dir,"/save");
 279
 280   /* Create them. In the case they exist they won't destroy anything. */
 281   mkdir(st_dir, 0755);
 282   mkdir(st_save_dir, 0755);
 283
 284   sprintf(str, "%s/levels", st_dir);
 285   mkdir(str, 0755);
 286
 287   // User has not that a datadir, so we try some magic
 288   if (datadir.empty())
 289     {
 290 #ifndef WIN32
 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 #else
 313         datadir = DATA_PREFIX;
 314 #endif
 315     }
 316   printf("Datadir: %s\n", datadir.c_str());
 317 }
 318
 319 /* Create and setup menus. */
 320 void st_menu(void)
 321 {
 322   main_menu      = new Menu();
 323   options_menu   = new Menu();
 324   load_game_menu = new Menu();
 325   save_game_menu = new Menu();
 326   game_menu      = new Menu();
 327   highscore_menu = new Menu();
 328
 329   main_menu->additem(MN_LABEL,"Main Menu",0,0);
 330   main_menu->additem(MN_HL,"",0,0);
 331   main_menu->additem(MN_ACTION,"Start Game",0,0);
 332   main_menu->additem(MN_GOTO,"Load Game",0,load_game_menu);
 333   main_menu->additem(MN_GOTO,"Options",0,options_menu);
 334   main_menu->additem(MN_ACTION,"Level editor",0,0);
 335   main_menu->additem(MN_ACTION,"Credits",0,0);
 336   main_menu->additem(MN_HL,"",0,0);
 337   main_menu->additem(MN_ACTION,"Quit",0,0);
 338
 339   options_menu->additem(MN_LABEL,"Options",0,0);
 340   options_menu->additem(MN_HL,"",0,0);
 341   options_menu->additem(MN_TOGGLE,"Fullscreen",use_fullscreen,0);
 342   if(audio_device)
 343     {
 344       options_menu->additem(MN_TOGGLE,"Sound     ",use_sound,0);
 345       options_menu->additem(MN_TOGGLE,"Music     ",use_music,0);
 346     }
 347   else
 348     {
 349       options_menu->additem(MN_DEACTIVE,"Sound     ",use_sound,0);
 350       options_menu->additem(MN_DEACTIVE,"Music     ",use_music,0);
 351     }
 352   options_menu->additem(MN_TOGGLE,"Show FPS  ",show_fps,0);
 353   options_menu->additem(MN_HL,"",0,0);
 354   options_menu->additem(MN_BACK,"Back",0,0);
 355
 356   load_game_menu->additem(MN_LABEL,"Load Game",0,0);
 357   load_game_menu->additem(MN_HL,"",0,0);
 358   load_game_menu->additem(MN_DEACTIVE,"Slot 1",0,0);
 359   load_game_menu->additem(MN_DEACTIVE,"Slot 2",0,0);
 360   load_game_menu->additem(MN_DEACTIVE,"Slot 3",0,0);
 361   load_game_menu->additem(MN_DEACTIVE,"Slot 4",0,0);
 362   load_game_menu->additem(MN_DEACTIVE,"Slot 5",0,0);
 363   load_game_menu->additem(MN_HL,"",0,0);
 364   load_game_menu->additem(MN_BACK,"Back",0,0);
 365
 366   save_game_menu->additem(MN_LABEL,"Save Game",0,0);
 367   save_game_menu->additem(MN_HL,"",0,0);
 368   save_game_menu->additem(MN_DEACTIVE,"Slot 1",0,0);
 369   save_game_menu->additem(MN_DEACTIVE,"Slot 2",0,0);
 370   save_game_menu->additem(MN_DEACTIVE,"Slot 3",0,0);
 371   save_game_menu->additem(MN_DEACTIVE,"Slot 4",0,0);
 372   save_game_menu->additem(MN_DEACTIVE,"Slot 5",0,0);
 373   save_game_menu->additem(MN_HL,"",0,0);
 374   save_game_menu->additem(MN_BACK,"Back",0,0);
 375
 376   game_menu->additem(MN_LABEL,"InGame Menu",0,0);
 377   game_menu->additem(MN_HL,"",0,0);
 378   game_menu->additem(MN_ACTION,"Return To Game",0,0);
 379   game_menu->additem(MN_GOTO,"Save Game",0,save_game_menu);
 380   game_menu->additem(MN_GOTO,"Load Game",0,load_game_menu);
 381   game_menu->additem(MN_GOTO,"Options",0,options_menu);
 382   game_menu->additem(MN_HL,"",0,0);
 383   game_menu->additem(MN_ACTION,"Quit Game",0,0);
 384
 385   highscore_menu->additem(MN_TEXTFIELD,"Enter your name:",0,0);
 386 }
 387
 388 void update_load_save_game_menu(Menu* pmenu, int load)
 389 {
 390   for(int i = 2; i < 7; ++i)
 391     {
 392       char *tmp;
 393       slotinfo(&tmp,i-1);
 394       if(load && strlen(tmp) == strlen("Slot X - Free") )
 395         pmenu->item[i].kind = MN_DEACTIVE;
 396       else
 397         pmenu->item[i].kind = MN_ACTION;
 398       menu_item_change_text(&pmenu->item[i],tmp);
 399       free(tmp);
 400     }
 401 }
 402
 403 void process_save_load_game_menu(int save)
 404 {
 405   int slot;
 406   switch (slot = (save ? save_game_menu->check() : load_game_menu->check()))
 407     {
 408     default:
 409       if(slot != -1)
 410         {
 411           if(save == true)
 412             {
 413               savegame(slot - 1);
 414             }
 415           else
 416             {
 417               if(game_started == false)
 418                 {
 419                   gameloop("default",slot - 1,ST_GL_LOAD_GAME);
 420                   show_menu = true;
 421                   Menu::set_current(main_menu);
 422                 }
 423               else
 424                 loadgame(slot - 1);
 425             }
 426           st_pause_ticks_stop();
 427         }
 428       break;
 429     }
 430 }
 431
 432 /* Handle changes made to global settings in the options menu. */
 433 void process_options_menu(void)
 434 {
 435   switch (options_menu->check())
 436     {
 437     case 2:
 438       if(use_fullscreen != options_menu->item[2].toggled)
 439         {
 440           use_fullscreen = !use_fullscreen;
 441           st_video_setup();
 442         }
 443       break;
 444     case 3:
 445       if(use_sound != options_menu->item[3].toggled)
 446         use_sound = !use_sound;
 447       break;
 448     case 4:
 449       if(use_music != options_menu->item[4].toggled)
 450         {
 451           if(use_music == true)
 452             {
 453               if(playing_music())
 454                 {
 455                   halt_music();
 456                 }
 457               use_music = false;
 458             }
 459           else
 460             {
 461               use_music = true;
 462               if (!playing_music())
 463                 {
 464                   play_current_music();
 465                 }
 466             }
 467         }
 468       break;
 469     case 5:
 470       if(show_fps != options_menu->item[5].toggled)
 471         show_fps = !show_fps;
 472       break;
 473     }
 474 }
 475
 476 void st_general_setup(void)
 477 {
 478   /* Seed random number generator: */
 479
 480   srand(SDL_GetTicks());
 481
 482   /* Set icon image: */
 483
 484   seticon();
 485
 486   /* Unicode needed for input handling: */
 487
 488   SDL_EnableUNICODE(1);
 489
 490   /* Load global images: */
 491
 492   text_load(&black_text, datadir + "/images/status/letters-black.png", TEXT_TEXT, 16,18);
 493   text_load(&gold_text,datadir + "/images/status/letters-gold.png", TEXT_TEXT, 16,18);
 494   text_load(&blue_text,datadir + "/images/status/letters-blue.png", TEXT_TEXT, 16,18);
 495   text_load(&red_text,datadir + "/images/status/letters-red.png", TEXT_TEXT, 16,18);
 496   text_load(&white_text,datadir + "/images/status/letters-white.png", TEXT_TEXT, 16,18);
 497   text_load(&white_small_text,datadir + "/images/status/letters-white-small.png", TEXT_TEXT, 8,9);
 498   text_load(&white_big_text,datadir + "/images/status/letters-white-big.png", TEXT_TEXT, 20,23);
 499   text_load(&yellow_nums,datadir + "/images/status/numbers.png", TEXT_NUM, 32,32);
 500
 501   /* Load GUI/menu images: */
 502   texture_load(&checkbox, datadir + "/images/status/checkbox.png", USE_ALPHA);
 503   texture_load(&checkbox_checked, datadir + "/images/status/checkbox-checked.png", USE_ALPHA);
 504   texture_load(&back, datadir + "/images/status/back.png", USE_ALPHA);
 505   texture_load(&arrow_left, datadir + "/images/icons/left.png", USE_ALPHA);
 506   texture_load(&arrow_right, datadir + "/images/icons/right.png", USE_ALPHA);
 507
 508 }
 509
 510 void st_general_free(void)
 511 {
 512
 513   /* Free global images: */
 514
 515   text_free(&black_text);
 516   text_free(&gold_text);
 517   text_free(&white_text);
 518   text_free(&blue_text);
 519   text_free(&red_text);
 520   text_free(&white_small_text);
 521   text_free(&white_big_text);
 522
 523   /* Free GUI/menu images: */
 524   texture_free(&checkbox);
 525   texture_free(&checkbox_checked);
 526   texture_free(&back);
 527   texture_free(&arrow_left);
 528   texture_free(&arrow_right);
 529
 530   /* Free menus */
 531   delete main_menu;
 532   delete game_menu;
 533   delete options_menu;
 534   delete highscore_menu;
 535   delete save_game_menu;
 536   delete load_game_menu;
 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 == true)
 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 = false;
 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 == true)
 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 = false;
 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   use_joystick = true;
 665
 666   if (SDL_Init(SDL_INIT_JOYSTICK) < 0)
 667     {
 668       fprintf(stderr, "Warning: I could not initialize joystick!\n"
 669               "The Simple DirectMedia error that occured was:\n"
 670               "%s\n\n", SDL_GetError());
 671
 672       use_joystick = false;
 673     }
 674   else
 675     {
 676       /* Open joystick: */
 677       if (SDL_NumJoysticks() <= 0)
 678         {
 679           fprintf(stderr, "Warning: No joysticks are available.\n");
 680
 681           use_joystick = false;
 682         }
 683       else
 684         {
 685           js = SDL_JoystickOpen(joystick_num);
 686
 687           if (js == NULL)
 688             {
 689               fprintf(stderr, "Warning: Could not open joystick %d.\n"
 690                       "The Simple DirectMedia error that occured was:\n"
 691                       "%s\n\n", joystick_num, SDL_GetError());
 692
 693               use_joystick = false;
 694             }
 695           else
 696             {
 697               /* Check for proper joystick configuration: */
 698
 699               if (SDL_JoystickNumAxes(js) < 2)
 700                 {
 701                   fprintf(stderr,
 702                           "Warning: Joystick does not have enough axes!\n");
 703
 704                   use_joystick = false;
 705                 }
 706               else
 707                 {
 708                   if (SDL_JoystickNumButtons(js) < 2)
 709                     {
 710                       fprintf(stderr,
 711                               "Warning: "
 712                               "Joystick does not have enough buttons!\n");
 713
 714                       use_joystick = false;
 715                     }
 716                 }
 717             }
 718         }
 719     }
 720 }
 721
 722 void st_audio_setup(void)
 723 {
 724
 725   /* Init SDL Audio silently even if --disable-sound : */
 726
 727   if (audio_device == true)
 728     {
 729       if (SDL_Init(SDL_INIT_AUDIO) < 0)
 730         {
 731           /* only print out message if sound or music
 732              was not disabled at command-line
 733            */
 734           if (use_sound || use_music)
 735             {
 736               fprintf(stderr,
 737                       "\nWarning: I could not initialize audio!\n"
 738                       "The Simple DirectMedia error that occured was:\n"
 739                       "%s\n\n", SDL_GetError());
 740             }
 741           /* keep the programming logic the same :-)
 742              because in this case, use_sound & use_music' values are ignored
 743              when there's no available audio device
 744           */
 745           use_sound = false;
 746           use_music = false;
 747           audio_device = false;
 748         }
 749     }
 750
 751
 752   /* Open sound silently regarless the value of "use_sound": */
 753
 754   if (audio_device == true)
 755     {
 756       if (open_audio(44100, AUDIO_S16, 2, 2048) < 0)
 757         {
 758           /* only print out message if sound or music
 759              was not disabled at command-line
 760            */
 761           if ((use_sound == true) || (use_music == true))
 762             {
 763               fprintf(stderr,
 764                       "\nWarning: I could not set up audio for 44100 Hz "
 765                       "16-bit stereo.\n"
 766                       "The Simple DirectMedia error that occured was:\n"
 767                       "%s\n\n", SDL_GetError());
 768             }
 769           use_sound = false;
 770           use_music = false;
 771           audio_device = false;
 772         }
 773     }
 774
 775 }
 776
 777
 778 /* --- SHUTDOWN --- */
 779
 780 void st_shutdown(void)
 781 {
 782   close_audio();
 783   SDL_Quit();
 784 }
 785
 786
 787 /* --- ABORT! --- */
 788
 789 void st_abort(const std::string& reason, const std::string& details)
 790 {
 791   fprintf(stderr, "\nError: %s\n%s\n\n", reason.c_str(), details.c_str());
 792   st_shutdown();
 793   exit(1);
 794 }
 795
 796
 797 /* Set Icon (private) */
 798
 799 void seticon(void)
 800 {
 801   int masklen;
 802   Uint8 * mask;
 803   SDL_Surface * icon;
 804
 805
 806   /* Load icon into a surface: */
 807
 808   icon = IMG_Load((datadir + "/images/icon.png").c_str());
 809   if (icon == NULL)
 810     {
 811       fprintf(stderr,
 812               "\nError: I could not load the icon image: %s%s\n"
 813               "The Simple DirectMedia error that occured was:\n"
 814               "%s\n\n", datadir.c_str(), "/images/icon.png", SDL_GetError());
 815       exit(1);
 816     }
 817
 818
 819   /* Create mask: */
 820
 821   masklen = (((icon -> w) + 7) / 8) * (icon -> h);
 822   mask = (Uint8*) malloc(masklen * sizeof(Uint8));
 823   memset(mask, 0xFF, masklen);
 824
 825
 826   /* Set icon: */
 827
 828   SDL_WM_SetIcon(icon, mask);
 829
 830
 831   /* Free icon surface & mask: */
 832
 833   free(mask);
 834   SDL_FreeSurface(icon);
 835 }
 836
 837
 838 /* Parse command-line arguments: */
 839
 840 void parseargs(int argc, char * argv[])
 841 {
 842   int i;
 843
 844   /* Set defaults: */
 845
 846
 847   debug_mode = false;
 848   use_fullscreen = false;
 849   show_fps = false;
 850   use_gl = false;
 851
 852   use_sound = true;
 853   use_music = true;
 854   audio_device = true;
 855
 856   /* Parse arguments: */
 857
 858   for (i = 1; i < argc; i++)
 859     {
 860       if (strcmp(argv[i], "--fullscreen") == 0 ||
 861           strcmp(argv[i], "-f") == 0)
 862         {
 863           /* Use full screen: */
 864
 865           use_fullscreen = true;
 866         }
 867       else if (strcmp(argv[i], "--joystick") == 0 || strcmp(argv[i], "-j") == 0)
 868         {
 869           assert(i+1 < argc);
 870           joystick_num = atoi(argv[++i]);
 871         }
 872       else if (strcmp(argv[i], "--worldmap") == 0)
 873         {
 874           launch_worldmap_mode = true;
 875         }
 876       else if (strcmp(argv[i], "--datadir") == 0
 877                || strcmp(argv[i], "-d") == 0 )
 878         {
 879           assert(i+1 < argc);
 880           datadir = argv[++i];
 881         }
 882       else if (strcmp(argv[i], "--show-fps") == 0)
 883         {
 884           /* Use full screen: */
 885
 886           show_fps = true;
 887         }
 888       else if (strcmp(argv[i], "--opengl") == 0 ||
 889                strcmp(argv[i], "-gl") == 0)
 890         {
 891 #ifndef NOOPENGL
 892           /* Use OpengGL: */
 893
 894           use_gl = true;
 895 #endif
 896
 897         }
 898       else if (strcmp(argv[i], "--usage") == 0)
 899         {
 900           /* Show usage: */
 901
 902           usage(argv[0], 0);
 903         }
 904       else if (strcmp(argv[i], "--version") == 0)
 905         {
 906           /* Show version: */
 907
 908           printf("Super Tux - version " VERSION "\n");
 909           exit(0);
 910         }
 911       else if (strcmp(argv[i], "--disable-sound") == 0)
 912         {
 913           /* Disable the compiled in sound feature */
 914           printf("Sounds disabled \n");
 915           use_sound = false;
 916         }
 917       else if (strcmp(argv[i], "--disable-music") == 0)
 918         {
 919           /* Disable the compiled in sound feature */
 920           printf("Music disabled \n");
 921           use_music = false;
 922         }
 923       else if (strcmp(argv[i], "--debug-mode") == 0)
 924         {
 925           /* Enable the debug-mode */
 926           debug_mode = true;
 927
 928         }
 929       else if (strcmp(argv[i], "--help") == 0)
 930         {         /* Show help: */
 931           puts("Super Tux " VERSION "\n"
 932                "  Please see the file \"README.txt\" for more details.\n");
 933           printf("Usage: %s [OPTIONS] FILENAME\n\n", argv[0]);
 934           puts("Display Options:\n"
 935                "  --fullscreen        Run in fullscreen mode.\n"
 936                "  --opengl            If opengl support was compiled in, this will enable\n"
 937                "                      the EXPERIMENTAL OpenGL mode.\n"
 938                "\n"
 939                "Sound Options:\n"
 940                "  --disable-sound     If sound support was compiled in,  this will\n"
 941                "                      disable sound for this session of the game.\n"
 942                "  --disable-music     Like above, but this will disable music.\n"
 943                "\n"
 944                "Misc Options:\n"
 945                "  -j, --joystick NUM  Use joystick NUM (default: 0)\n"
 946                "  --worldmap          Start in worldmap-mode (EXPERIMENTAL)\n"
 947                "  -d, --datadir DIR   Load Game data from DIR (default: automatic)\n"
 948                "  --debug-mode        Enables the debug-mode, which is useful for developers.\n"
 949                "  --help              Display a help message summarizing command-line\n"
 950                "                      options, license and game controls.\n"
 951                "  --usage             Display a brief message summarizing command-line options.\n"
 952                "  --version           Display the version of SuperTux you're running.\n\n"
 953                );
 954           exit(0);
 955         }
 956       else if (argv[i][0] != '-')
 957         {
 958           level_startup_file = argv[i];
 959         }
 960       else
 961         {
 962           /* Unknown - complain! */
 963
 964           usage(argv[0], 1);
 965         }
 966     }
 967 }
 968
 969
 970 /* Display usage: */
 971
 972 void usage(char * prog, int ret)
 973 {
 974   FILE * fi;
 975
 976
 977   /* Determine which stream to write to: */
 978
 979   if (ret == 0)
 980     fi = stdout;
 981   else
 982     fi = stderr;
 983
 984
 985   /* Display the usage message: */
 986
 987   fprintf(fi, "Usage: %s [--fullscreen] [--opengl] [--disable-sound] [--disable-music] [--debug-mode] | [--usage | --help | --version] [--worldmap] FILENAME\n",
 988           prog);
 989
 990
 991   /* Quit! */
 992
 993   exit(ret);
 994 }
 995