lib/app/setup.cpp

   1 //  $Id$
   2 //
   3 //  SuperTux -  A Jump'n Run
   4 //  Copyright (C) 2000 Bill Kendrick <bill@newbreedsoftware.com>
   5 //
   6 //  This program is free software; you can redistribute it and/or
   7 //  modify it under the terms of the GNU General Public License
   8 //  as published by the Free Software Foundation; either version 2
   9 //  of the License, or (at your option) any later version.
  10 //
  11 //  This program is distributed in the hope that it will be useful,
  12 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 //  GNU General Public License for more details.
  15 //
  16 //  You should have received a copy of the GNU General Public License
  17 //  along with this program; if not, write to the Free Software
  18 //  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  19
  20 #include <config.h>
  21
  22 #include <cassert>
  23 #include <cstdio>
  24 #include <iostream>
  25 #include <cstdio>
  26 #include <cstdlib>
  27 #include <cstring>
  28 #include <cerrno>
  29 #include <unistd.h>
  30
  31 #include "SDL.h"
  32 #include "SDL_image.h"
  33 #ifndef NOOPENGL
  34 #include "SDL_opengl.h"
  35 #endif
  36
  37 #include <sys/stat.h>
  38 #include <sys/types.h>
  39 #include <dirent.h>
  40 #ifndef WIN32
  41 #include <libgen.h>
  42 #endif
  43
  44 #include <cctype>
  45
  46 #include "../app/globals.h"
  47 #include "../app/setup.h"
  48 #include "../video/screen.h"
  49 #include "../video/surface.h"
  50 #include "../gui/menu.h"
  51 #include "../utils/configfile.h"
  52 #include "../audio/sound_manager.h"
  53 #include "../app/gettext.h"
  54
  55 using namespace SuperTux;
  56
  57 #ifdef WIN32
  58 #define mkdir(dir, mode)    mkdir(dir)
  59 // on win32 we typically don't want LFS paths
  60 #undef DATA_PREFIX
  61 #define DATA_PREFIX "./data/"
  62 #endif
  63
  64 /* Local function prototypes: */
  65
  66 void seticon(void);
  67 void usage(char * prog, int ret);
  68
  69 /* Does the given file exist and is it accessible? */
  70 int FileSystem::faccessible(const std::string& filename)
  71 {
  72   struct stat filestat;
  73   if (stat(filename.c_str(), &filestat) == -1)
  74     {
  75       return false;
  76     }
  77   else
  78     {
  79       if(S_ISREG(filestat.st_mode))
  80         return true;
  81       else
  82         return false;
  83     }
  84 }
  85
  86 /* Can we write to this location? */
  87 int FileSystem::fwriteable(const std::string& filename)
  88 {
  89   FILE* fi;
  90   fi = fopen(filename.c_str(), "wa");
  91   if (fi == NULL)
  92     {
  93       return false;
  94     }
  95   fclose(fi);
  96   return true;
  97 }
  98
  99 /* Makes sure a directory is created in either the SuperTux home directory or the SuperTux base directory.*/
 100 int FileSystem::fcreatedir(const std::string& relative_dir)
 101 {
 102   std::string path = st_dir + "/" + relative_dir + "/";
 103   if(mkdir(path.c_str(),0755) != 0)
 104     {
 105       path = datadir + "/" + relative_dir + "/";
 106       if(mkdir(path.c_str(),0755) != 0)
 107         {
 108           return false;
 109         }
 110       else
 111         {
 112           return true;
 113         }
 114     }
 115   else
 116     {
 117       return true;
 118     }
 119 }
 120
 121 /* Get all names of sub-directories in a certain directory. */
 122 /* Returns the number of sub-directories found. */
 123 /* Note: The user has to free the allocated space. */
 124 std::set<std::string> FileSystem::dsubdirs(const std::string &rel_path,const  std::string& expected_file)
 125 {
 126   DIR *dirStructP;
 127   struct dirent *direntp;
 128   std::set<std::string> sdirs;
 129   std::string filename;
 130   std::string path = st_dir + "/" + rel_path;
 131
 132   if((dirStructP = opendir(path.c_str())) != NULL)
 133     {
 134       while((direntp = readdir(dirStructP)) != NULL)
 135         {
 136           std::string absolute_filename;
 137           struct stat buf;
 138
 139           absolute_filename = path + "/" + direntp->d_name;
 140
 141           if (stat(absolute_filename.c_str(), &buf) == 0 && S_ISDIR(buf.st_mode))
 142             {
 143               if(!expected_file.empty())
 144                 {
 145                   filename = path + "/" + direntp->d_name + "/" + expected_file;
 146                   if(!faccessible(filename))
 147                     continue;
 148                 }
 149
 150               sdirs.insert(direntp->d_name);
 151             }
 152         }
 153       closedir(dirStructP);
 154     }
 155
 156   path = datadir + "/" + rel_path;
 157   if((dirStructP = opendir(path.c_str())) != NULL)
 158     {
 159       while((direntp = readdir(dirStructP)) != NULL)
 160         {
 161           std::string absolute_filename;
 162           struct stat buf;
 163
 164           absolute_filename = path + "/" + direntp->d_name;
 165
 166           if (stat(absolute_filename.c_str(), &buf) == 0 && S_ISDIR(buf.st_mode))
 167             {
 168               if(!expected_file.empty())
 169                 {
 170                   filename = path + "/" + direntp->d_name + "/" + expected_file;
 171                   if(!faccessible(filename.c_str()))
 172                     {
 173                       continue;
 174                     }
 175                   else
 176                     {
 177                       filename = st_dir + "/" + rel_path + "/" + direntp->d_name + "/" + expected_file;
 178                       if(faccessible(filename.c_str()))
 179                         continue;
 180                     }
 181                 }
 182
 183               sdirs.insert(direntp->d_name);
 184             }
 185         }
 186       closedir(dirStructP);
 187     }
 188
 189   return sdirs;
 190 }
 191
 192 std::set<std::string> FileSystem::dfiles(const std::string& rel_path, const  std::string& glob, const  std::string& exception_str)
 193 {
 194   DIR *dirStructP;
 195   struct dirent *direntp;
 196   std::set<std::string> sdirs;
 197   std::string path = st_dir + "/" + rel_path;
 198
 199   if((dirStructP = opendir(path.c_str())) != NULL)
 200     {
 201       while((direntp = readdir(dirStructP)) != NULL)
 202         {
 203           std::string absolute_filename;
 204           struct stat buf;
 205
 206           absolute_filename = path + "/" + direntp->d_name;
 207
 208           if (stat(absolute_filename.c_str(), &buf) == 0 && S_ISREG(buf.st_mode))
 209             {
 210               if(!exception_str.empty())
 211                 {
 212                   if(strstr(direntp->d_name,exception_str.c_str()) != NULL)
 213                     continue;
 214                 }
 215               if(!glob.empty())
 216                 if(strstr(direntp->d_name,glob.c_str()) == NULL)
 217                   continue;
 218
 219               sdirs.insert(direntp->d_name);
 220             }
 221         }
 222       closedir(dirStructP);
 223     }
 224
 225   path = datadir + "/" + rel_path;
 226   if((dirStructP = opendir(path.c_str())) != NULL)
 227     {
 228       while((direntp = readdir(dirStructP)) != NULL)
 229         {
 230           std::string absolute_filename;
 231           struct stat buf;
 232
 233           absolute_filename = path + "/" + direntp->d_name;
 234
 235           if (stat(absolute_filename.c_str(), &buf) == 0 && S_ISREG(buf.st_mode))
 236             {
 237               if(!exception_str.empty())
 238                 {
 239                   if(strstr(direntp->d_name,exception_str.c_str()) != NULL)
 240                     continue;
 241                 }
 242               if(!glob.empty())
 243                 if(strstr(direntp->d_name,glob.c_str()) == NULL)
 244                   continue;
 245
 246               sdirs.insert(direntp->d_name);
 247             }
 248         }
 249       closedir(dirStructP);
 250     }
 251
 252   return sdirs;
 253 }
 254
 255 void Setup::init(const std::string& _package_name,
 256         const std::string& _package_symbol_name,
 257         const std::string& _package_version)
 258 {
 259   directories();
 260   dictionary_manager.add_directory(datadir + "/locale");
 261
 262   package_name = _package_name;
 263   package_symbol_name = _package_symbol_name;
 264   package_version = _package_version;
 265 }
 266
 267 /* --- SETUP --- */
 268 /* Set SuperTux configuration and save directories */
 269 void Setup::directories()
 270 {
 271   std::string home;
 272   /* Get home directory (from $HOME variable)... if we can't determine it,
 273      use the current directory ("."): */
 274   if (getenv("HOME") != NULL)
 275     home = getenv("HOME");
 276   else
 277     home = ".";
 278
 279   st_dir = home + "/." + package_symbol_name;
 280
 281   /* Remove .supertux config-file from old SuperTux versions */
 282   if(FileSystem::faccessible(st_dir))
 283     {
 284       remove(st_dir.c_str());
 285     }
 286
 287   st_save_dir = st_dir + "/save";
 288
 289   /* Create them. In the case they exist they won't destroy anything. */
 290   mkdir(st_dir.c_str(), 0755);
 291   mkdir(st_save_dir.c_str(), 0755);
 292
 293   mkdir((st_dir + "/levels").c_str(), 0755);
 294
 295   // try current directory as datadir
 296   if(datadir.empty()) {
 297       if(FileSystem::faccessible("./data/intro.txt"))
 298           datadir = "./data";
 299   }
 300
 301   // User has not that a datadir, so we try some magic
 302   if (datadir.empty())
 303     {
 304 #ifndef WIN32
 305       // Detect datadir
 306       char exe_file[PATH_MAX];
 307       if (readlink("/proc/self/exe", exe_file, PATH_MAX) < 0)
 308         {
 309           puts("Couldn't read /proc/self/exe, using default path: " DATA_PREFIX);
 310           datadir = DATA_PREFIX;
 311         }
 312       else
 313         {
 314           std::string exedir = std::string(dirname(exe_file)) + "/";
 315
 316           datadir = exedir + "../data"; // SuperTux run from source dir
 317           if (access(datadir.c_str(), F_OK) != 0)
 318             {
 319               datadir = exedir + "../../data";  //SuperTux run from source dir (with libtool script)
 320
 321               if (access(datadir.c_str(), F_OK) != 0)
 322               {
 323               datadir = exedir + "../share/" + package_symbol_name; // SuperTux run from PATH
 324               if (access(datadir.c_str(), F_OK) != 0)
 325                 { // If all fails, fall back to compiled path
 326                   datadir = DATA_PREFIX;
 327                 }
 328               }
 329             }
 330         }
 331 #else
 332   datadir = DATA_PREFIX;
 333 #endif
 334     }
 335   printf("Datadir: %s\n", datadir.c_str());
 336 }
 337
 338 void Setup::general(void)
 339 {
 340   /* Seed random number generator: */
 341
 342   srand(SDL_GetTicks());
 343
 344   /* Set icon image: */
 345
 346   seticon();
 347
 348   /* Unicode needed for input handling: */
 349
 350   SDL_EnableUNICODE(1);
 351
 352   /* Load GUI/menu images: */
 353   checkbox = new Surface(datadir + "/images/status/checkbox.png", true);
 354   checkbox_checked = new Surface(datadir + "/images/status/checkbox-checked.png", true);
 355   back = new Surface(datadir + "/images/status/back.png", true);
 356   arrow_left = new Surface(datadir + "/images/icons/left.png", true);
 357   arrow_right = new Surface(datadir + "/images/icons/right.png", true);
 358
 359   /* Load the mouse-cursor */
 360   mouse_cursor = new MouseCursor( datadir + "/images/status/mousecursor.png",1);
 361   MouseCursor::set_current(mouse_cursor);
 362
 363 }
 364
 365 void Setup::general_free(void)
 366 {
 367
 368   /* Free GUI/menu images: */
 369   delete checkbox;
 370   delete checkbox_checked;
 371   delete back;
 372   delete arrow_left;
 373   delete arrow_right;
 374
 375   /* Free mouse-cursor */
 376   delete mouse_cursor;
 377
 378 }
 379
 380 void Setup::video(unsigned int screen_w, unsigned int screen_h)
 381 {
 382   /* Init SDL Video: */
 383   if (SDL_Init(SDL_INIT_VIDEO) < 0)
 384     {
 385       fprintf(stderr,
 386               "\nError: I could not initialize video!\n"
 387               "The Simple DirectMedia error that occured was:\n"
 388               "%s\n\n", SDL_GetError());
 389       exit(1);
 390     }
 391
 392   /* Open display: */
 393   if(use_gl)
 394     video_gl(screen_w, screen_h);
 395   else
 396     video_sdl(screen_w, screen_h);
 397
 398   Surface::reload_all();
 399
 400   /* Set window manager stuff: */
 401   SDL_WM_SetCaption((package_name + " " + package_version).c_str(), package_name.c_str());
 402 }
 403
 404 void Setup::video_sdl(unsigned int screen_w, unsigned int screen_h)
 405 {
 406   if (use_fullscreen)
 407     {
 408       screen = SDL_SetVideoMode(screen_w, screen_h, 0, SDL_FULLSCREEN ) ; /* | SDL_HWSURFACE); */
 409       if (screen == NULL)
 410         {
 411           fprintf(stderr,
 412                   "\nWarning: I could not set up fullscreen video for "
 413                   "800x600 mode.\n"
 414                   "The Simple DirectMedia error that occured was:\n"
 415                   "%s\n\n", SDL_GetError());
 416           use_fullscreen = false;
 417         }
 418     }
 419   else
 420     {
 421       screen = SDL_SetVideoMode(screen_w, screen_h, 0, SDL_HWSURFACE | SDL_DOUBLEBUF );
 422
 423       if (screen == NULL)
 424         {
 425           fprintf(stderr,
 426                   "\nError: I could not set up video for 800x600 mode.\n"
 427                   "The Simple DirectMedia error that occured was:\n"
 428                   "%s\n\n", SDL_GetError());
 429           exit(1);
 430         }
 431     }
 432 }
 433
 434 void Setup::video_gl(unsigned int screen_w, unsigned int screen_h)
 435 {
 436 #ifndef NOOPENGL
 437
 438   SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 5);
 439   SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 5);
 440   SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 5);
 441   SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
 442   SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
 443
 444   if (use_fullscreen)
 445     {
 446       screen = SDL_SetVideoMode(screen_w, screen_h, 0, SDL_FULLSCREEN | SDL_OPENGL) ; /* | SDL_HWSURFACE); */
 447       if (screen == NULL)
 448         {
 449           fprintf(stderr,
 450                   "\nWarning: I could not set up fullscreen video for "
 451                   "640x480 mode.\n"
 452                   "The Simple DirectMedia error that occured was:\n"
 453                   "%s\n\n", SDL_GetError());
 454           use_fullscreen = false;
 455         }
 456     }
 457   else
 458     {
 459       screen = SDL_SetVideoMode(screen_w, screen_h, 0, SDL_OPENGL);
 460
 461       if (screen == NULL)
 462         {
 463           fprintf(stderr,
 464                   "\nError: I could not set up video for 640x480 mode.\n"
 465                   "The Simple DirectMedia error that occured was:\n"
 466                   "%s\n\n", SDL_GetError());
 467           exit(1);
 468         }
 469     }
 470
 471   /*
 472    * Set up OpenGL for 2D rendering.
 473    */
 474   glDisable(GL_DEPTH_TEST);
 475   glDisable(GL_CULL_FACE);
 476
 477   glViewport(0, 0, screen->w, screen->h);
 478   glMatrixMode(GL_PROJECTION);
 479   glLoadIdentity();
 480   glOrtho(0, screen->w, screen->h, 0, -1.0, 1.0);
 481
 482   glMatrixMode(GL_MODELVIEW);
 483   glLoadIdentity();
 484   glTranslatef(0.0f, 0.0f, 0.0f);
 485
 486 #endif
 487
 488 }
 489
 490 void Setup::joystick(void)
 491 {
 492
 493   /* Init Joystick: */
 494
 495   use_joystick = true;
 496
 497   if (SDL_Init(SDL_INIT_JOYSTICK) < 0)
 498     {
 499       fprintf(stderr, "Warning: I could not initialize joystick!\n"
 500               "The Simple DirectMedia error that occured was:\n"
 501               "%s\n\n", SDL_GetError());
 502
 503       use_joystick = false;
 504     }
 505   else
 506     {
 507       /* Open joystick: */
 508       if (SDL_NumJoysticks() <= 0)
 509         {
 510           fprintf(stderr, "Info: No joysticks were found.\n");
 511
 512           use_joystick = false;
 513         }
 514       else
 515         {
 516           js = SDL_JoystickOpen(joystick_num);
 517
 518           if (js == NULL)
 519             {
 520               fprintf(stderr, "Warning: Could not open joystick %d.\n"
 521                       "The Simple DirectMedia error that occured was:\n"
 522                       "%s\n\n", joystick_num, SDL_GetError());
 523
 524               use_joystick = false;
 525             }
 526           else
 527             {
 528               if (SDL_JoystickNumAxes(js) < 2)
 529                 {
 530                   fprintf(stderr,
 531                           "Warning: Joystick does not have enough axes!\n");
 532
 533                   use_joystick = false;
 534                 }
 535               else
 536                 {
 537                   if (SDL_JoystickNumButtons(js) < 2)
 538                     {
 539                       fprintf(stderr,
 540                               "Warning: "
 541                               "Joystick does not have enough buttons!\n");
 542
 543                       use_joystick = false;
 544                     }
 545                 }
 546             }
 547         }
 548     }
 549 }
 550
 551 void Setup::audio(void)
 552 {
 553
 554   /* Init SDL Audio silently even if --disable-sound : */
 555
 556   if (SoundManager::get()->audio_device_available())
 557     {
 558       if (SDL_Init(SDL_INIT_AUDIO) < 0)
 559         {
 560           /* only print out message if sound or music
 561              was not disabled at command-line
 562            */
 563           if (SoundManager::get()->sound_enabled() || SoundManager::get()->music_enabled())
 564             {
 565               fprintf(stderr,
 566                       "\nWarning: I could not initialize audio!\n"
 567                       "The Simple DirectMedia error that occured was:\n"
 568                       "%s\n\n", SDL_GetError());
 569             }
 570           /* keep the programming logic the same :-)
 571              because in this case, use_sound & use_music' values are ignored
 572              when there's no available audio device
 573           */
 574           SoundManager::get()->enable_sound(false);
 575           SoundManager::get()->enable_music(false);
 576           SoundManager::get()->set_audio_device_available(false);
 577         }
 578     }
 579
 580
 581   /* Open sound silently regarless the value of "use_sound": */
 582
 583   if (SoundManager::get()->audio_device_available())
 584     {
 585       if (SoundManager::get()->open_audio(44100, AUDIO_S16, 2, 2048) < 0)
 586         {
 587           /* only print out message if sound or music
 588              was not disabled at command-line
 589            */
 590           if (SoundManager::get()->sound_enabled() || SoundManager::get()->music_enabled())
 591             {
 592               fprintf(stderr,
 593                       "\nWarning: I could not set up audio for 44100 Hz "
 594                       "16-bit stereo.\n"
 595                       "The Simple DirectMedia error that occured was:\n"
 596                       "%s\n\n", SDL_GetError());
 597             }
 598           SoundManager::get()->enable_sound(false);
 599           SoundManager::get()->enable_music(false);
 600           SoundManager::get()->set_audio_device_available(false);
 601         }
 602     }
 603
 604 }
 605
 606
 607 /* --- SHUTDOWN --- */
 608
 609 void Termination::shutdown(void)
 610 {
 611   config->save();
 612   SoundManager::get()->close_audio();
 613   SDL_Quit();
 614 }
 615
 616 /* --- ABORT! --- */
 617
 618 void Termination::abort(const std::string& reason, const std::string& details)
 619 {
 620   fprintf(stderr, "\nError: %s\n%s\n\n", reason.c_str(), details.c_str());
 621   shutdown();
 622   ::abort();
 623 }
 624
 625 /* Set Icon (private) */
 626
 627 void seticon(void)
 628 {
 629 //  int masklen;
 630 //  Uint8 * mask;
 631   SDL_Surface * icon;
 632
 633
 634   /* Load icon into a surface: */
 635
 636   icon = IMG_Load((datadir + "/images/" + package_symbol_name + ".xpm").c_str());
 637   if (icon == NULL)
 638     {
 639       fprintf(stderr,
 640               "\nError: I could not load the icon image: %s%s\n"
 641               "The Simple DirectMedia error that occured was:\n"
 642               "%s\n\n", datadir.c_str(), ("/images/" + package_symbol_name + ".xpm").c_str(), SDL_GetError());
 643       exit(1);
 644     }
 645
 646
 647   /* Create mask: */
 648 /*
 649   masklen = (((icon -> w) + 7) / 8) * (icon -> h);
 650   mask = (Uint8*) malloc(masklen * sizeof(Uint8));
 651   memset(mask, 0xFF, masklen);
 652 */
 653
 654   /* Set icon: */
 655
 656   SDL_WM_SetIcon(icon, NULL);//mask);
 657
 658
 659   /* Free icon surface & mask: */
 660
 661 //  free(mask);
 662   SDL_FreeSurface(icon);
 663 }
 664
 665
 666 /* Parse command-line arguments: */
 667
 668 void Setup::parseargs(int argc, char * argv[])
 669 {
 670   int i;
 671
 672   config->load();
 673
 674   /* Parse arguments: */
 675
 676   for (i = 1; i < argc; i++)
 677     {
 678       if (strcmp(argv[i], "--fullscreen") == 0 ||
 679           strcmp(argv[i], "-f") == 0)
 680         {
 681           use_fullscreen = true;
 682         }
 683       else if (strcmp(argv[i], "--window") == 0 ||
 684                strcmp(argv[i], "-w") == 0)
 685         {
 686           use_fullscreen = false;
 687         }
 688       else if (strcmp(argv[i], "--joystick") == 0 || strcmp(argv[i], "-j") == 0)
 689         {
 690           assert(i+1 < argc);
 691           joystick_num = atoi(argv[++i]);
 692         }
 693       else if (strcmp(argv[i], "--joymap") == 0)
 694         {
 695           assert(i+1 < argc);
 696           if (sscanf(argv[++i],
 697                      "%d:%d:%d:%d:%d",
 698                      &joystick_keymap.x_axis,
 699                      &joystick_keymap.y_axis,
 700                      &joystick_keymap.a_button,
 701                      &joystick_keymap.b_button,
 702                      &joystick_keymap.start_button) != 5)
 703             {
 704               puts("Warning: Invalid or incomplete joymap, should be: 'XAXIS:YAXIS:A:B:START'");
 705             }
 706           else
 707             {
 708               std::cout << "Using new joymap:\n"
 709                         << "  X-Axis:       " << joystick_keymap.x_axis << "\n"
 710                         << "  Y-Axis:       " << joystick_keymap.y_axis << "\n"
 711                         << "  A-Button:     " << joystick_keymap.a_button << "\n"
 712                         << "  B-Button:     " << joystick_keymap.b_button << "\n"
 713                         << "  Start-Button: " << joystick_keymap.start_button << std::endl;
 714             }
 715         }
 716       else if (strcmp(argv[i], "--leveleditor") == 0)
 717         {
 718           launch_leveleditor_mode = true;
 719         }
 720       else if (strcmp(argv[i], "--worldmap") == 0)
 721         {
 722           launch_worldmap_mode = true;
 723         }
 724       else if (strcmp(argv[i], "--flip-levels") == 0)
 725         {
 726           flip_levels_mode = true;
 727         }
 728       else if (strcmp(argv[i], "--datadir") == 0
 729                || strcmp(argv[i], "-d") == 0 )
 730         {
 731           assert(i+1 < argc);
 732           datadir = argv[++i];
 733         }
 734       else if (strcmp(argv[i], "--show-fps") == 0)
 735         {
 736           /* Use full screen: */
 737
 738           show_fps = true;
 739         }
 740       else if (strcmp(argv[i], "--opengl") == 0 ||
 741                strcmp(argv[i], "-gl") == 0)
 742         {
 743 #ifndef NOOPENGL
 744           /* Use OpengGL: */
 745
 746           use_gl = true;
 747 #endif
 748         }
 749       else if (strcmp(argv[i], "--sdl") == 0)
 750           {
 751             use_gl = false;
 752           }
 753       else if (strcmp(argv[i], "--usage") == 0)
 754         {
 755           /* Show usage: */
 756
 757           usage(argv[0], 0);
 758         }
 759       else if (strcmp(argv[i], "--version") == 0)
 760         {
 761           /* Show version: */
 762           printf((package_name + " " + package_version + "\n").c_str() );
 763           exit(0);
 764         }
 765       else if (strcmp(argv[i], "--disable-sound") == 0)
 766         {
 767           /* Disable the compiled in sound feature */
 768           printf("Sounds disabled \n");
 769           SoundManager::get()->enable_sound(false);
 770         }
 771       else if (strcmp(argv[i], "--disable-music") == 0)
 772         {
 773           /* Disable the compiled in sound feature */
 774           printf("Music disabled \n");
 775           SoundManager::get()->enable_music(false);
 776         }
 777       else if (strcmp(argv[i], "--debug") == 0)
 778         {
 779           /* Enable the debug-mode */
 780           debug_mode = true;
 781
 782         }
 783       else if (strcmp(argv[i], "--help") == 0)
 784         {     /* Show help: */
 785           puts(_(("  SuperTux  " + package_version + "\n"
 786                "  Please see the file \"README.txt\" for more details.\n").c_str()));
 787           printf(_("Usage: %s [OPTIONS] FILENAME\n\n"), argv[0]);
 788           puts(_("Display Options:\n"
 789                "  -f, --fullscreen    Run in fullscreen mode.\n"
 790                "  -w, --window        Run in window mode.\n"
 791                "  --opengl            If OpenGL support was compiled in, this will tell\n"
 792                "                      SuperTux to make use of it.\n"
 793                "  --sdl               Use the SDL software graphical renderer\n"
 794                "\n"
 795                "Sound Options:\n"
 796                "  --disable-sound     If sound support was compiled in,  this will\n"
 797                "                      disable sound for this session of the game.\n"
 798                "  --disable-music     Like above, but this will disable music.\n"
 799                "\n"
 800                "Misc Options:\n"
 801                "  -j, --joystick NUM  Use joystick NUM (default: 0)\n"
 802                "  --joymap XAXIS:YAXIS:A:B:START\n"
 803                "                      Define how joystick buttons and axis should be mapped\n"
 804                "  --leveleditor       Opens the leveleditor in a file.\n"
 805                "  --worldmap          Opens the specified worldmap file.\n"
 806                "  --flip-levels       Flip levels upside-down.\n"
 807                "  -d, --datadir DIR   Load Game data from DIR (default: automatic)\n"
 808                "  --debug             Enables the debug mode, which is useful for developers.\n"
 809                "  --help              Display a help message summarizing command-line\n"
 810                "                      options, license and game controls.\n"
 811                "  --usage             Display a brief message summarizing command-line options.\n"
 812                "  --version           Display the version of SuperTux you're running.\n\n"
 813                ));
 814           exit(0);
 815         }
 816       else if (argv[i][0] != '-')
 817         {
 818           level_startup_file = argv[i];
 819         }
 820       else
 821         {
 822           /* Unknown - complain! */
 823
 824           usage(argv[0], 1);
 825         }
 826     }
 827 }
 828
 829
 830 /* Display usage: */
 831
 832 void usage(char * prog, int ret)
 833 {
 834   FILE * fi;
 835
 836
 837   /* Determine which stream to write to: */
 838
 839   if (ret == 0)
 840     fi = stdout;
 841   else
 842     fi = stderr;
 843
 844
 845   /* Display the usage message: */
 846
 847   fprintf(fi, _("Usage: %s [--fullscreen] [--opengl] [--disable-sound] [--disable-music] [--debug] | [--usage | --help | --version] [--leveleditor] [--worldmap] [--flip-levels] FILENAME\n"),
 848           prog);
 849
 850
 851   /* Quit! */
 852
 853   exit(ret);
 854 }
 855
 856 std::set<std::string> FileSystem::read_directory(const std::string& pathname)
 857 {
 858   std::set<std::string> dirnames;
 859
 860   DIR* dir = opendir(pathname.c_str());
 861   if (dir)
 862     {
 863       struct dirent *direntp;
 864
 865       while((direntp = readdir(dir)))
 866         {
 867           dirnames.insert(direntp->d_name);
 868         }
 869
 870       closedir(dir);
 871     }
 872
 873   return dirnames;
 874 }
 875
 876 /* EOF */