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
  39 /* Local function prototypes: */
  40
  41 void seticon(void);
  42 void usage(char * prog, int ret);
  43
  44 /* Does the given file exist and is it accessible? */
  45 int faccessible(char *filename)
  46 {
  47   struct stat filestat;
  48   if (stat(filename, &filestat) == -1)
  49     return NO;
  50   else
  51     return YES;
  52 }
  53
  54 /* Can we write to this location? */
  55 int fwriteable(char *filename)
  56 {
  57   FILE* fi;
  58   fi = fopen(filename, "wa");
  59   if (fi == NULL)
  60     {
  61       return NO;
  62     }
  63   return YES;
  64 }
  65
  66 /* Makes sure a directory is created in either the SuperTux base directory or the SuperTux base directory.*/
  67 int fcreatedir(char* relative_dir)
  68 {
  69   char path[1024];
  70   snprintf(path, 1024, "%s/%s/", st_dir, relative_dir);
  71   if(mkdir(path,0755) != 0)
  72     {
  73       snprintf(path, 1024, "%s/%s/", DATA_PREFIX, relative_dir);
  74       if(mkdir(path,0755) != 0)
  75         {
  76           return NO;
  77         }
  78       else
  79         {
  80           return YES;
  81         }
  82     }
  83   else
  84     {
  85       return YES;
  86     }
  87 }
  88
  89 /* Get all names of sub-directories in a certain directory. */
  90 /* Returns the number of sub-directories found. */
  91 /* Note: The user has to free the allocated space. */
  92 char ** dsubdirs(char *rel_path, char* expected_file, int* num)
  93 {
  94   DIR *dirStructP;
  95   struct dirent *direntp;
  96   int i = 0;
  97   char ** sdirs= NULL;
  98   char filename[100];
  99   char path[1024];
 100
 101   sprintf(path,"%s/%s",st_dir,rel_path);
 102   if((dirStructP = opendir(path)) != NULL)
 103     {
 104       while((direntp = readdir(dirStructP)) != NULL)
 105         {
 106           if ( direntp->d_type == DT_DIR )
 107             {
 108               if(expected_file != NULL)
 109                 {
 110                   sprintf(filename,"%s/%s/%s",path,direntp->d_name,expected_file);
 111                   if(!faccessible(filename))
 112                     continue;
 113                 }
 114
 115               sdirs = (char**) realloc(sdirs, sizeof(char*) * (i+1));
 116               sdirs[i] = (char*) malloc(sizeof(char) * strlen(direntp->d_name) + 1 );
 117               strcpy(sdirs[i],direntp->d_name);
 118               ++i;
 119             }
 120         }
 121       closedir(dirStructP);
 122     }
 123
 124   sprintf(path,"%s/%s",DATA_PREFIX,rel_path);
 125   if((dirStructP = opendir(path)) != NULL)
 126     {
 127       while((direntp = readdir(dirStructP)) != NULL)
 128         {
 129           if ( direntp->d_type == DT_DIR )
 130             {
 131               if(expected_file != NULL)
 132                 {
 133                   sprintf(filename,"%s/%s/%s",path,direntp->d_name,expected_file);
 134                   if(!faccessible(filename))
 135                     {
 136                       continue;
 137                     }
 138                   else
 139                     {
 140                       sprintf(filename,"%s/%s/%s/%s",st_dir,rel_path,direntp->d_name,expected_file);
 141                       if(faccessible(filename))
 142                         continue;
 143                     }
 144                 }
 145
 146               sdirs = (char**) realloc(sdirs, sizeof(char*) * (i+1));
 147               sdirs[i] = (char*) malloc(sizeof(char) * strlen(direntp->d_name) + 1 );
 148               strcpy(sdirs[i],direntp->d_name);
 149               ++i;
 150             }
 151         }
 152       closedir(dirStructP);
 153     }
 154
 155   *num = i;
 156   return sdirs;
 157 }
 158
 159 void free_strings(char **strings, int num)
 160 {
 161 int i;
 162 for(i=0; i < num; ++i)
 163 free(strings[i]);
 164 }
 165
 166 /* --- SETUP --- */
 167 /* Set SuperTux configuration and save directories */
 168 void st_directory_setup(void)
 169 {
 170   char *home;
 171   char str[1024];
 172   /* Get home directory (from $HOME variable)... if we can't determine it,
 173      use the current directory ("."): */
 174   if (getenv("HOME") != NULL)
 175     home = getenv("HOME");
 176   else
 177     home = ".";
 178
 179   st_dir = (char *) malloc(sizeof(char) * (strlen(home) +
 180                            strlen("/.supertux") + 1));
 181   strcpy(st_dir, home);
 182   strcat(st_dir, "/.supertux");
 183
 184   st_save_dir = (char *) malloc(sizeof(char) * (strlen(st_dir) + strlen("/save") + 1));
 185
 186   strcpy(st_save_dir,st_dir);
 187   strcat(st_save_dir,"/save");
 188
 189   /* Create them. In the case they exist they won't destroy anything. */
 190 #ifdef LINUX
 191
 192   mkdir(st_dir, 0755);
 193   mkdir(st_save_dir, 0755);
 194
 195   sprintf(str, "%s/levels", st_dir);
 196   mkdir(str, 0755);
 197 #else
 198   #ifdef WIN32
 199
 200   mkdir(st_dir);
 201   mkdir(st_save_dir);
 202   sprintf(str, "%s/levels", st_dir);
 203   mkdir(str);
 204 #endif
 205 #endif
 206
 207 }
 208
 209 /* Create and setup menus. */
 210 void st_menu(void)
 211 {
 212
 213   menu_init(&main_menu);
 214   menu_additem(&main_menu,menu_item_create(MN_ACTION,"Start Game",0,0));
 215   menu_additem(&main_menu,menu_item_create(MN_ACTION,"Load Game",0,0));
 216   menu_additem(&main_menu,menu_item_create(MN_GOTO,"Options",0,&options_menu));
 217   menu_additem(&main_menu,menu_item_create(MN_ACTION,"Level editor",0,0));
 218   menu_additem(&main_menu,menu_item_create(MN_ACTION,"Quit",0,0));
 219
 220   menu_init(&options_menu);
 221   menu_additem(&options_menu,menu_item_create(MN_TOGGLE,"Fullscreen",use_fullscreen,0));
 222   if(audio_device == YES)
 223     {
 224       menu_additem(&options_menu,menu_item_create(MN_TOGGLE,"Sound",use_sound,0));
 225       menu_additem(&options_menu,menu_item_create(MN_TOGGLE,"Music",use_music,0));
 226     }
 227   else
 228     {
 229       menu_additem(&options_menu,menu_item_create(MN_DEACTIVE,"Sound",use_sound,0));
 230       menu_additem(&options_menu,menu_item_create(MN_DEACTIVE,"Music",use_music,0));
 231     }
 232   menu_additem(&options_menu,menu_item_create(MN_TOGGLE,"Show FPS",show_fps,0));
 233   menu_additem(&options_menu,menu_item_create(MN_BACK,"Back",0,0));
 234
 235   menu_init(&leveleditor_menu);
 236   menu_additem(&leveleditor_menu,menu_item_create(MN_ACTION,"Return To Level Editor",0,0));
 237   menu_additem(&leveleditor_menu,menu_item_create(MN_ACTION,"New Level",0,0));
 238   menu_additem(&leveleditor_menu,menu_item_create(MN_ACTION,"Load Level",0,0));
 239   menu_additem(&leveleditor_menu,menu_item_create(MN_ACTION,"Save Level",0,0));
 240   menu_additem(&leveleditor_menu,menu_item_create(MN_ACTION,"Quit Level Editor",0,0));
 241
 242   menu_init(&game_menu);
 243   menu_additem(&game_menu,menu_item_create(MN_ACTION,"Return To Game",0,0));
 244   menu_additem(&game_menu,menu_item_create(MN_ACTION,"Save Game",0,0));
 245   menu_additem(&game_menu,menu_item_create(MN_ACTION,"Load Game",0,0));
 246   menu_additem(&game_menu,menu_item_create(MN_GOTO,"Options",0,&options_menu));
 247   menu_additem(&game_menu,menu_item_create(MN_ACTION,"Quit Game",0,0));
 248
 249   menu_init(&highscore_menu);
 250   menu_additem(&highscore_menu,menu_item_create(MN_TEXTFIELD,"Enter your name:",0,0));
 251
 252 }
 253
 254 /* Handle changes made to global settings in the options menu. */
 255 void process_options_menu(void)
 256 {
 257   switch (menu_check(&options_menu))
 258     {
 259     case 0:
 260       if(use_fullscreen != options_menu.item[0].toggled)
 261         {
 262           use_fullscreen = !use_fullscreen;
 263           st_video_setup();
 264         }
 265       break;
 266     case 1:
 267       if(use_sound != options_menu.item[1].toggled)
 268         use_sound = !use_sound;
 269       break;
 270     case 2:
 271       if(use_music != options_menu.item[2].toggled)
 272         {
 273           if(use_music == YES)
 274             {
 275               if(playing_music())
 276                 {
 277                   halt_music();
 278                 }
 279               use_music = NO;
 280             }
 281           else
 282             {
 283               use_music = YES;
 284               if (!playing_music())
 285                 {
 286                   play_current_music();
 287                 }
 288             }
 289         }
 290       break;
 291     case 3:
 292       if(show_fps != options_menu.item[3].toggled)
 293         show_fps = !show_fps;
 294       break;
 295     }
 296 }
 297
 298 void st_general_setup(void)
 299 {
 300   /* Seed random number generator: */
 301
 302   srand(SDL_GetTicks());
 303
 304   /* Load global images: */
 305
 306   text_load(&black_text,DATA_PREFIX "/images/status/letters-black.png", TEXT_TEXT, 16,18);
 307   text_load(&gold_text,DATA_PREFIX "/images/status/letters-gold.png", TEXT_TEXT, 16,18);
 308   text_load(&blue_text,DATA_PREFIX "/images/status/letters-blue.png", TEXT_TEXT, 16,18);
 309   text_load(&red_text,DATA_PREFIX "/images/status/letters-red.png", TEXT_TEXT, 16,18);
 310   text_load(&white_text,DATA_PREFIX "/images/status/letters-white.png", TEXT_TEXT, 16,18);
 311   text_load(&white_small_text,DATA_PREFIX "/images/status/letters-white-small.png", TEXT_TEXT, 8,9);
 312   text_load(&yellow_nums,DATA_PREFIX "/images/status/numbers.png", TEXT_NUM, 32,32);
 313
 314   /* Load GUI/menu images: */
 315   texture_load(&checkbox, DATA_PREFIX "/images/status/checkbox.png", USE_ALPHA);
 316   texture_load(&checkbox_checked, DATA_PREFIX "/images/status/checkbox-checked.png", USE_ALPHA);
 317
 318   /* Set icon image: */
 319
 320   seticon();
 321   SDL_EnableUNICODE(1);
 322
 323 }
 324
 325 void st_general_free(void)
 326 {
 327
 328   /* Free global images: */
 329
 330   text_free(&black_text);
 331   text_free(&gold_text);
 332   text_free(&white_text);
 333   text_free(&blue_text);
 334   text_free(&red_text);
 335   text_free(&white_small_text);
 336
 337   /* Free GUI/menu images: */
 338   texture_free(&checkbox);
 339   texture_free(&checkbox_checked);
 340
 341   /* Free menus */
 342
 343   menu_free(&main_menu);
 344   menu_free(&game_menu);
 345   menu_free(&options_menu);
 346   menu_free(&leveleditor_menu);
 347   menu_free(&highscore_menu);
 348
 349 }
 350
 351 void st_video_setup(void)
 352 {
 353
 354   if(screen != NULL)
 355     SDL_FreeSurface(screen);
 356
 357   /* Init SDL Video: */
 358
 359   if (SDL_Init(SDL_INIT_VIDEO) < 0)
 360     {
 361       fprintf(stderr,
 362               "\nError: I could not initialize video!\n"
 363               "The Simple DirectMedia error that occured was:\n"
 364               "%s\n\n", SDL_GetError());
 365       exit(1);
 366     }
 367
 368   /* Open display: */
 369
 370   if(use_gl)
 371     st_video_setup_gl();
 372   else
 373     st_video_setup_sdl();
 374
 375   texture_setup();
 376
 377   /* Set window manager stuff: */
 378
 379   SDL_WM_SetCaption("Super Tux", "Super Tux");
 380
 381 }
 382
 383 void st_video_setup_sdl(void)
 384 {
 385   SDL_FreeSurface(screen);
 386
 387   if (use_fullscreen == YES)
 388     {
 389       screen = SDL_SetVideoMode(640, 480, 16, SDL_FULLSCREEN ) ; /* | SDL_HWSURFACE); */
 390       if (screen == NULL)
 391         {
 392           fprintf(stderr,
 393                   "\nWarning: I could not set up fullscreen video for "
 394                   "640x480 mode.\n"
 395                   "The Simple DirectMedia error that occured was:\n"
 396                   "%s\n\n", SDL_GetError());
 397           use_fullscreen = NO;
 398         }
 399     }
 400   else
 401     {
 402       screen = SDL_SetVideoMode(640, 480, 16, SDL_HWSURFACE | SDL_DOUBLEBUF );
 403
 404       if (screen == NULL)
 405         {
 406           fprintf(stderr,
 407                   "\nError: I could not set up video for 640x480 mode.\n"
 408                   "The Simple DirectMedia error that occured was:\n"
 409                   "%s\n\n", SDL_GetError());
 410           exit(1);
 411         }
 412     }
 413 }
 414
 415 void st_video_setup_gl(void)
 416 {
 417 #ifndef NOOPENGL
 418
 419   SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 5);
 420   SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 5);
 421   SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 5);
 422   SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
 423   SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
 424
 425   if (use_fullscreen == YES)
 426     {
 427       screen = SDL_SetVideoMode(640, 480, 32, SDL_FULLSCREEN | SDL_OPENGL | SDL_OPENGLBLIT ) ; /* | SDL_HWSURFACE); */
 428       if (screen == NULL)
 429         {
 430           fprintf(stderr,
 431                   "\nWarning: I could not set up fullscreen video for "
 432                   "640x480 mode.\n"
 433                   "The Simple DirectMedia error that occured was:\n"
 434                   "%s\n\n", SDL_GetError());
 435           use_fullscreen = NO;
 436         }
 437     }
 438   else
 439     {
 440       screen = SDL_SetVideoMode(640, 480, 32, SDL_HWSURFACE | SDL_OPENGL | SDL_OPENGLBLIT  );
 441
 442       if (screen == NULL)
 443         {
 444           fprintf(stderr,
 445                   "\nError: I could not set up video for 640x480 mode.\n"
 446                   "The Simple DirectMedia error that occured was:\n"
 447                   "%s\n\n", SDL_GetError());
 448           exit(1);
 449         }
 450     }
 451
 452   /*
 453    * Set up OpenGL for 2D rendering.
 454    */
 455   glDisable(GL_DEPTH_TEST);
 456   glDisable(GL_CULL_FACE);
 457
 458   glViewport(0, 0, screen->w, screen->h);
 459   glMatrixMode(GL_PROJECTION);
 460   glLoadIdentity();
 461   glOrtho(0, screen->w, screen->h, 0, -1.0, 1.0);
 462
 463   glMatrixMode(GL_MODELVIEW);
 464   glLoadIdentity();
 465   glTranslatef(0.0f, 0.0f, 0.0f);
 466
 467 #endif
 468
 469 }
 470
 471 void st_joystick_setup(void)
 472 {
 473
 474   /* Init Joystick: */
 475
 476 #ifdef JOY_YES
 477   use_joystick = YES;
 478
 479   if (SDL_Init(SDL_INIT_JOYSTICK) < 0)
 480     {
 481       fprintf(stderr, "Warning: I could not initialize joystick!\n"
 482               "The Simple DirectMedia error that occured was:\n"
 483               "%s\n\n", SDL_GetError());
 484
 485       use_joystick = NO;
 486     }
 487   else
 488     {
 489       /* Open joystick: */
 490
 491       if (SDL_NumJoysticks() <= 0)
 492         {
 493           fprintf(stderr, "Warning: No joysticks are available.\n");
 494
 495           use_joystick = NO;
 496         }
 497       else
 498         {
 499           js = SDL_JoystickOpen(0);
 500
 501           if (js == NULL)
 502             {
 503               fprintf(stderr, "Warning: Could not open joystick 1.\n"
 504                       "The Simple DirectMedia error that occured was:\n"
 505                       "%s\n\n", SDL_GetError());
 506
 507               use_joystick = NO;
 508             }
 509           else
 510             {
 511               /* Check for proper joystick configuration: */
 512
 513               if (SDL_JoystickNumAxes(js) < 2)
 514                 {
 515                   fprintf(stderr,
 516                           "Warning: Joystick does not have enough axes!\n");
 517
 518                   use_joystick = NO;
 519                 }
 520               else
 521                 {
 522                   if (SDL_JoystickNumButtons(js) < 2)
 523                     {
 524                       fprintf(stderr,
 525                               "Warning: "
 526                               "Joystick does not have enough buttons!\n");
 527
 528                       use_joystick = NO;
 529                     }
 530                 }
 531             }
 532         }
 533     }
 534 #endif
 535
 536 }
 537
 538 void st_audio_setup(void)
 539 {
 540
 541   /* Init SDL Audio silently even if --disable-sound : */
 542
 543   if (audio_device == YES)
 544     {
 545       if (SDL_Init(SDL_INIT_AUDIO) < 0)
 546         {
 547           /* only print out message if sound or music
 548              was not disabled at command-line
 549            */
 550           if (use_sound == YES || use_music == YES)
 551             {
 552               fprintf(stderr,
 553                       "\nWarning: I could not initialize audio!\n"
 554                       "The Simple DirectMedia error that occured was:\n"
 555                       "%s\n\n", SDL_GetError());
 556             }
 557           /* keep the programming logic the same :-)
 558              because in this case, use_sound & use_music' values are ignored
 559              when there's no available audio device
 560           */
 561           use_sound = NO;
 562           use_music = NO;
 563           audio_device = NO;
 564         }
 565     }
 566
 567
 568   /* Open sound silently regarless the value of "use_sound": */
 569
 570   if (audio_device == YES)
 571     {
 572       if (open_audio(44100, AUDIO_S16, 2, 2048) < 0)
 573         {
 574           /* only print out message if sound or music
 575              was not disabled at command-line
 576            */
 577           if ((use_sound == YES) || (use_music == YES))
 578             {
 579               fprintf(stderr,
 580                       "\nWarning: I could not set up audio for 44100 Hz "
 581                       "16-bit stereo.\n"
 582                       "The Simple DirectMedia error that occured was:\n"
 583                       "%s\n\n", SDL_GetError());
 584             }
 585           use_sound = NO;
 586           use_music = NO;
 587           audio_device = NO;
 588         }
 589     }
 590
 591 }
 592
 593
 594 /* --- SHUTDOWN --- */
 595
 596 void st_shutdown(void)
 597 {
 598   close_audio();
 599   SDL_Quit();
 600 }
 601
 602
 603 /* --- ABORT! --- */
 604
 605 void st_abort(char * reason, char * details)
 606 {
 607   fprintf(stderr, "\nError: %s\n%s\n\n", reason, details);
 608   st_shutdown();
 609   exit(1);
 610 }
 611
 612
 613 /* Set Icon (private) */
 614
 615 void seticon(void)
 616 {
 617   int masklen;
 618   Uint8 * mask;
 619   SDL_Surface * icon;
 620
 621
 622   /* Load icon into a surface: */
 623
 624   icon = IMG_Load(DATA_PREFIX "/images/icon.png");
 625   if (icon == NULL)
 626     {
 627       fprintf(stderr,
 628               "\nError: I could not load the icon image: %s\n"
 629               "The Simple DirectMedia error that occured was:\n"
 630               "%s\n\n", DATA_PREFIX "images/icon.png", SDL_GetError());
 631       exit(1);
 632     }
 633
 634
 635   /* Create mask: */
 636
 637   masklen = (((icon -> w) + 7) / 8) * (icon -> h);
 638   mask = (Uint8*) malloc(masklen * sizeof(Uint8));
 639   memset(mask, 0xFF, masklen);
 640
 641
 642   /* Set icon: */
 643
 644   SDL_WM_SetIcon(icon, mask);
 645
 646
 647   /* Free icon surface & mask: */
 648
 649   free(mask);
 650   SDL_FreeSurface(icon);
 651 }
 652
 653
 654 /* Parse command-line arguments: */
 655
 656 void parseargs(int argc, char * argv[])
 657 {
 658   int i;
 659
 660   /* Set defaults: */
 661
 662
 663   debug_mode = NO;
 664   use_fullscreen = NO;
 665   show_fps = NO;
 666   use_gl = NO;
 667
 668 #ifndef NOSOUND
 669
 670   use_sound = YES;
 671   use_music = YES;
 672   audio_device = YES;
 673 #else
 674
 675   use_sound = NO;
 676   use_music = NO;
 677   audio_device = NO;
 678 #endif
 679
 680   /* Parse arguments: */
 681
 682   for (i = 1; i < argc; i++)
 683     {
 684       if (strcmp(argv[i], "--fullscreen") == 0 ||
 685           strcmp(argv[i], "-f") == 0)
 686         {
 687           /* Use full screen: */
 688
 689           use_fullscreen = YES;
 690         }
 691       else if (strcmp(argv[i], "--show-fps") == 0)
 692         {
 693           /* Use full screen: */
 694
 695           show_fps = YES;
 696         }
 697       else if (strcmp(argv[i], "--opengl") == 0 ||
 698                strcmp(argv[i], "-gl") == 0)
 699         {
 700 #ifndef NOOPENGL
 701           /* Use OpengGL: */
 702
 703           use_gl = YES;
 704 #endif
 705
 706         }
 707       else if (strcmp(argv[i], "--usage") == 0)
 708         {
 709           /* Show usage: */
 710
 711           usage(argv[0], 0);
 712         }
 713       else if (strcmp(argv[i], "--version") == 0)
 714         {
 715           /* Show version: */
 716
 717           printf("Super Tux - version " VERSION "\n");
 718           exit(0);
 719         }
 720       else if (strcmp(argv[i], "--disable-sound") == 0)
 721         {
 722           /* Disable the compiled in sound feature */
 723 #ifndef NOSOUND
 724           printf("Sounds disabled \n");
 725           use_sound = NO;
 726 #else
 727
 728           printf("Warning: Sounds feature is not compiled in \n");
 729 #endif
 730
 731         }
 732       else if (strcmp(argv[i], "--disable-music") == 0)
 733         {
 734           /* Disable the compiled in sound feature */
 735 #ifndef NOSOUND
 736           printf("Music disabled \n");
 737           use_music = NO;
 738 #else
 739
 740           printf("Warning: Music feature is not compiled in \n");
 741 #endif
 742
 743         }
 744       else if (strcmp(argv[i], "--debug-mode") == 0)
 745         {
 746           /* Enable the debug-mode */
 747           debug_mode = YES;
 748
 749         }
 750       else if (strcmp(argv[i], "--help") == 0)
 751         {         /* Show help: */
 752
 753           printf("Super Tux " VERSION "\n\n");
 754
 755           printf("----------  Command-line options  ----------\n\n");
 756
 757           printf("  --opengl            - If opengl support was compiled in, this will enable the EXPERIMENTAL OpenGL mode.\n\n");
 758
 759           printf("  --disable-sound     - If sound support was compiled in,  this will\n                        disable sound for this session of the game.\n\n");
 760
 761           printf("  --disable-music     - Like above, but this will disable music.\n\n");
 762
 763           printf("  --fullscreen        - Run in fullscreen mode.\n\n");
 764
 765           printf("  --debug-mode        - Enables the debug-mode, which is useful for developers.\n\n");
 766
 767           printf("  --help              - Display a help message summarizing command-line\n                        options, license and game controls.\n\n");
 768
 769           printf("  --usage             - Display a brief message summarizing command-line options.\n\n");
 770
 771           printf("  --version           - Display the version of SuperTux you're running.\n\n\n");
 772
 773
 774           printf("----------          License       ----------\n\n");
 775           printf("  This program comes with ABSOLUTELY NO WARRANTY.\n");
 776           printf("  This is free software, and you are welcome to redistribute\n");
 777           printf("  or modify it under certain conditions. See the file \n");
 778           printf("  \"COPYING.txt\" for more details.\n\n\n");
 779
 780           printf("----------      Game controls     ----------\n\n");
 781           printf("  Please see the file \"README.txt\"\n\n");
 782
 783           exit(0);
 784         }
 785       else
 786         {
 787           /* Unknown - complain! */
 788
 789           usage(argv[0], 1);
 790         }
 791     }
 792 }
 793
 794
 795 /* Display usage: */
 796
 797 void usage(char * prog, int ret)
 798 {
 799   FILE * fi;
 800
 801
 802   /* Determine which stream to write to: */
 803
 804   if (ret == 0)
 805     fi = stdout;
 806   else
 807     fi = stderr;
 808
 809
 810   /* Display the usage message: */
 811
 812   fprintf(fi, "Usage: %s [--fullscreen] [--opengl] [--disable-sound] [--disable-music] [--debug-mode] | [--usage | --help | --version]\n",
 813           prog);
 814
 815
 816   /* Quit! */
 817
 818   exit(ret);
 819 }
 820