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 "globals.h"
  47 #include "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 "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 bool 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 bool 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 bool 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 std::string FileSystem::dirname(const std::string& filename)
 256 {
 257   std::string::size_type p = filename.find_last_of('/');
 258   if(p == std::string::npos)
 259     return "";
 260
 261   return filename.substr(0, p+1);
 262 }
 263
 264 void Setup::init(const std::string& _package_name,
 265         const std::string& _package_symbol_name,
 266         const std::string& _package_version)
 267 {
 268   package_name = _package_name;
 269   package_symbol_name = _package_symbol_name;
 270   package_version = _package_version;
 271
 272   directories();
 273   dictionary_manager.add_directory(datadir + "/locale");
 274   dictionary_manager.set_charset("iso8859-1");
 275 }
 276
 277 /* --- SETUP --- */
 278 /* Set SuperTux configuration and save directories */
 279 void Setup::directories()
 280 {
 281   std::string home;
 282   /* Get home directory (from $HOME variable)... if we can't determine it,
 283      use the current directory ("."): */
 284   if (getenv("HOME") != NULL)
 285     home = getenv("HOME");
 286   else
 287     home = ".";
 288
 289   st_dir = home + "/." + package_symbol_name;
 290
 291   /* Remove .supertux config-file from old SuperTux versions */
 292   if(FileSystem::faccessible(st_dir)) {
 293     remove(st_dir.c_str());
 294   }
 295
 296   st_save_dir = st_dir + "/save";
 297
 298   /* Create them. In the case they exist they won't destroy anything. */
 299   mkdir(st_dir.c_str(), 0755);
 300   mkdir(st_save_dir.c_str(), 0755);
 301
 302   mkdir((st_dir + "/levels").c_str(), 0755);
 303
 304   // try current directory as datadir
 305   if(datadir.empty()) {
 306      if(FileSystem::faccessible("./data/credits.txt"))
 307           datadir = "./data/";
 308   }
 309
 310   // User has not that a datadir, so we try some magic
 311   if (datadir.empty())
 312     {
 313 #ifndef WIN32
 314       // Detect datadir
 315       char exe_file[PATH_MAX];
 316       if (readlink("/proc/self/exe", exe_file, PATH_MAX) < 0)
 317         {
 318           puts("Couldn't read /proc/self/exe, using default path: " DATA_PREFIX);
 319           datadir = DATA_PREFIX;
 320         }
 321       else
 322         {
 323           std::string exedir = std::string(dirname(exe_file)) + "/";
 324
 325           datadir = exedir + "./data/"; // SuperTux run from source dir
 326           if (access(datadir.c_str(), F_OK) != 0)
 327             {
 328               datadir = exedir + "../../../../data/";  //SuperTux run from source dir (with libtool script)
 329
 330               if (access(datadir.c_str(), F_OK) != 0)
 331               {
 332               datadir = exedir + "../share/" + package_symbol_name + "/"; // SuperTux run from PATH
 333               if (access(datadir.c_str(), F_OK) != 0)
 334                 { // If all fails, fall back to compiled path
 335                   datadir = DATA_PREFIX;
 336                   datadir += "/";
 337                 }
 338               }
 339             }
 340         }
 341 #else
 342       datadir = DATA_PREFIX;
 343       datadir += "/";
 344 #endif
 345     }
 346   printf("Datadir: %s\n", datadir.c_str());
 347 }
 348
 349 void Setup::general(void)
 350 {
 351   /* Seed random number generator: */
 352
 353   srand(SDL_GetTicks());
 354
 355   /* Set icon image: */
 356
 357   seticon();
 358
 359   /* Unicode needed for input handling: */
 360
 361   SDL_EnableUNICODE(1);
 362
 363   /* Load GUI/menu images: */
 364   checkbox = new Surface(datadir + "/images/status/checkbox.png", true);
 365   checkbox_checked = new Surface(datadir + "/images/status/checkbox-checked.png", true);
 366   back = new Surface(datadir + "/images/status/back.png", true);
 367   arrow_left = new Surface(datadir + "/images/icons/left.png", true);
 368   arrow_right = new Surface(datadir + "/images/icons/right.png", true);
 369
 370   /* Load the mouse-cursor */
 371   mouse_cursor = new MouseCursor( datadir + "/images/status/mousecursor.png",1);
 372   MouseCursor::set_current(mouse_cursor);
 373
 374 }
 375
 376 void Setup::general_free(void)
 377 {
 378
 379   /* Free GUI/menu images: */
 380   delete checkbox;
 381   delete checkbox_checked;
 382   delete back;
 383   delete arrow_left;
 384   delete arrow_right;
 385
 386   /* Free mouse-cursor */
 387   delete mouse_cursor;
 388
 389 }
 390
 391 void Setup::video(unsigned int screen_w, unsigned int screen_h)
 392 {
 393   /* Init SDL Video: */
 394   if (SDL_Init(SDL_INIT_VIDEO) < 0)
 395     {
 396       fprintf(stderr,
 397               "\nError: I could not initialize video!\n"
 398               "The Simple DirectMedia error that occured was:\n"
 399               "%s\n\n", SDL_GetError());
 400       exit(1);
 401     }
 402
 403   /* Open display: */
 404   if(use_gl)
 405     video_gl(screen_w, screen_h);
 406   else
 407     video_sdl(screen_w, screen_h);
 408
 409   Surface::reload_all();
 410
 411   /* Set window manager stuff: */
 412   SDL_WM_SetCaption((package_name + " " + package_version).c_str(), package_name.c_str());
 413 }
 414
 415 void Setup::video_sdl(unsigned int screen_w, unsigned int screen_h)
 416 {
 417   if (use_fullscreen)
 418     {
 419       screen = SDL_SetVideoMode(screen_w, screen_h, 0, SDL_FULLSCREEN ) ; /* | SDL_HWSURFACE); */
 420       if (screen == NULL)
 421         {
 422           fprintf(stderr,
 423                   "\nWarning: I could not set up fullscreen video for "
 424                   "800x600 mode.\n"
 425                   "The Simple DirectMedia error that occured was:\n"
 426                   "%s\n\n", SDL_GetError());
 427           use_fullscreen = false;
 428         }
 429     }
 430   else
 431     {
 432       screen = SDL_SetVideoMode(screen_w, screen_h, 0, SDL_HWSURFACE | SDL_DOUBLEBUF );
 433
 434       if (screen == NULL)
 435         {
 436           fprintf(stderr,
 437                   "\nError: I could not set up video for 800x600 mode.\n"
 438                   "The Simple DirectMedia error that occured was:\n"
 439                   "%s\n\n", SDL_GetError());
 440           exit(1);
 441         }
 442     }
 443 }
 444
 445 void Setup::video_gl(unsigned int screen_w, unsigned int screen_h)
 446 {
 447 #ifndef NOOPENGL
 448
 449   SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 5);
 450   SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 5);
 451   SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 5);
 452   SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
 453   SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
 454
 455   if (use_fullscreen)
 456     {
 457       screen = SDL_SetVideoMode(screen_w, screen_h, 0, SDL_FULLSCREEN | SDL_OPENGL) ; /* | SDL_HWSURFACE); */
 458       if (screen == NULL)
 459         {
 460           fprintf(stderr,
 461                   "\nWarning: I could not set up fullscreen video for "
 462                   "640x480 mode.\n"
 463                   "The Simple DirectMedia error that occured was:\n"
 464                   "%s\n\n", SDL_GetError());
 465           use_fullscreen = false;
 466         }
 467     }
 468   else
 469     {
 470       screen = SDL_SetVideoMode(screen_w, screen_h, 0, SDL_OPENGL);
 471
 472       if (screen == NULL)
 473         {
 474           fprintf(stderr,
 475                   "\nError: I could not set up video for 640x480 mode.\n"
 476                   "The Simple DirectMedia error that occured was:\n"
 477                   "%s\n\n", SDL_GetError());
 478           exit(1);
 479         }
 480     }
 481
 482   /*
 483    * Set up OpenGL for 2D rendering.
 484    */
 485   glDisable(GL_DEPTH_TEST);
 486   glDisable(GL_CULL_FACE);
 487
 488   glViewport(0, 0, screen->w, screen->h);
 489   glMatrixMode(GL_PROJECTION);
 490   glLoadIdentity();
 491   glOrtho(0, 800, 600, 0, -1.0, 1.0);
 492   //glOrtho(0, 800SCREEN_WIDTH, SCREEN_HEIGHT, 0, -1.0, 1.0);
 493
 494   glMatrixMode(GL_MODELVIEW);
 495   glLoadIdentity();
 496   glTranslatef(0.0f, 0.0f, 0.0f);
 497
 498 #endif
 499
 500 }
 501
 502 void Setup::joystick(void)
 503 {
 504
 505   /* Init Joystick: */
 506
 507   use_joystick = true;
 508
 509   if (SDL_Init(SDL_INIT_JOYSTICK) < 0)
 510     {
 511       fprintf(stderr, "Warning: I could not initialize joystick!\n"
 512               "The Simple DirectMedia error that occured was:\n"
 513               "%s\n\n", SDL_GetError());
 514
 515       use_joystick = false;
 516     }
 517   else
 518     {
 519       /* Open joystick: */
 520       if (SDL_NumJoysticks() <= 0)
 521         {
 522           fprintf(stderr, "Info: No joysticks were found.\n");
 523
 524           use_joystick = false;
 525         }
 526       else
 527         {
 528           js = SDL_JoystickOpen(joystick_num);
 529
 530           if (js == NULL)
 531             {
 532               fprintf(stderr, "Warning: Could not open joystick %d.\n"
 533                       "The Simple DirectMedia error that occured was:\n"
 534                       "%s\n\n", joystick_num, SDL_GetError());
 535
 536               use_joystick = false;
 537             }
 538           else
 539             {
 540               if (SDL_JoystickNumAxes(js) < 2)
 541                 {
 542                   fprintf(stderr,
 543                           "Warning: Joystick does not have enough axes!\n");
 544
 545                   use_joystick = false;
 546                 }
 547               else
 548                 {
 549                   if (SDL_JoystickNumButtons(js) < 2)
 550                     {
 551                       fprintf(stderr,
 552                               "Warning: "
 553                               "Joystick does not have enough buttons!\n");
 554
 555                       use_joystick = false;
 556                     }
 557                 }
 558             }
 559         }
 560     }
 561 }
 562
 563 void Setup::audio(void)
 564 {
 565
 566   /* Init SDL Audio silently even if --disable-sound : */
 567
 568   if (SoundManager::get()->audio_device_available())
 569     {
 570       if (SDL_Init(SDL_INIT_AUDIO) < 0)
 571         {
 572           /* only print out message if sound or music
 573              was not disabled at command-line
 574            */
 575           if (SoundManager::get()->sound_enabled() || SoundManager::get()->music_enabled())
 576             {
 577               fprintf(stderr,
 578                       "\nWarning: I could not initialize audio!\n"
 579                       "The Simple DirectMedia error that occured was:\n"
 580                       "%s\n\n", SDL_GetError());
 581             }
 582           /* keep the programming logic the same :-)
 583              because in this case, use_sound & use_music' values are ignored
 584              when there's no available audio device
 585           */
 586           SoundManager::get()->enable_sound(false);
 587           SoundManager::get()->enable_music(false);
 588           SoundManager::get()->set_audio_device_available(false);
 589         }
 590     }
 591
 592
 593   /* Open sound silently regarless the value of "use_sound": */
 594
 595   if (SoundManager::get()->audio_device_available())
 596     {
 597       if (SoundManager::get()->open_audio(44100, AUDIO_S16, 2, 2048) < 0)
 598         {
 599           /* only print out message if sound or music
 600              was not disabled at command-line
 601            */
 602           if (SoundManager::get()->sound_enabled() || SoundManager::get()->music_enabled())
 603             {
 604               fprintf(stderr,
 605                       "\nWarning: I could not set up audio for 44100 Hz "
 606                       "16-bit stereo.\n"
 607                       "The Simple DirectMedia error that occured was:\n"
 608                       "%s\n\n", SDL_GetError());
 609             }
 610           SoundManager::get()->enable_sound(false);
 611           SoundManager::get()->enable_music(false);
 612           SoundManager::get()->set_audio_device_available(false);
 613         }
 614     }
 615
 616 }
 617
 618
 619 /* --- SHUTDOWN --- */
 620
 621 void Termination::shutdown(void)
 622 {
 623   config->save();
 624   SoundManager::get()->close_audio();
 625   SDL_Quit();
 626 }
 627
 628 /* --- ABORT! --- */
 629
 630 void Termination::abort(const std::string& reason, const std::string& details)
 631 {
 632   fprintf(stderr, "\nError: %s\n%s\n\n", reason.c_str(), details.c_str());
 633   shutdown();
 634   ::abort();
 635 }
 636
 637 /* Set Icon (private) */
 638
 639 void seticon(void)
 640 {
 641 //  int masklen;
 642 //  Uint8 * mask;
 643   SDL_Surface * icon;
 644
 645
 646   /* Load icon into a surface: */
 647
 648   icon = IMG_Load((datadir + "/images/" + package_symbol_name + ".xpm").c_str());
 649   if (icon == NULL)
 650     {
 651       fprintf(stderr,
 652               "\nError: I could not load the icon image: %s%s\n"
 653               "The Simple DirectMedia error that occured was:\n"
 654               "%s\n\n", datadir.c_str(), ("/images/" + package_symbol_name + ".xpm").c_str(), SDL_GetError());
 655       exit(1);
 656     }
 657
 658
 659   /* Create mask: */
 660 /*
 661   masklen = (((icon -> w) + 7) / 8) * (icon -> h);
 662   mask = (Uint8*) malloc(masklen * sizeof(Uint8));
 663   memset(mask, 0xFF, masklen);
 664 */
 665
 666   /* Set icon: */
 667
 668   SDL_WM_SetIcon(icon, NULL);//mask);
 669
 670
 671   /* Free icon surface & mask: */
 672
 673 //  free(mask);
 674   SDL_FreeSurface(icon);
 675 }
 676
 677
 678 /* Parse command-line arguments: */
 679
 680 void Setup::parseargs(int argc, char * argv[])
 681 {
 682   int i;
 683
 684   config->load();
 685
 686   /* Parse arguments: */
 687
 688   for (i = 1; i < argc; i++)
 689     {
 690       if (strcmp(argv[i], "--fullscreen") == 0 ||
 691           strcmp(argv[i], "-f") == 0)
 692         {
 693           use_fullscreen = true;
 694         }
 695       else if (strcmp(argv[i], "--window") == 0 ||
 696                strcmp(argv[i], "-w") == 0)
 697         {
 698           use_fullscreen = false;
 699         }
 700       else if (strcmp(argv[i], "--geometry") == 0 ||
 701                strcmp(argv[i], "-g") == 0)
 702         {
 703           assert(i+1 < argc);
 704           if (sscanf(argv[++i],
 705                      "%dx%d", &screen_width, &screen_height) != 2)
 706             {
 707               puts("Warning: Invalid geometry spec, should be \"WIDTHxHEIGHT\"");
 708             }
 709         }
 710       else if (strcmp(argv[i], "--joystick") == 0 || strcmp(argv[i], "-j") == 0)
 711         {
 712           assert(i+1 < argc);
 713           joystick_num = atoi(argv[++i]);
 714         }
 715       else if (strcmp(argv[i], "--joymap") == 0)
 716         {
 717           assert(i+1 < argc);
 718           if (sscanf(argv[++i],
 719                      "%d:%d:%d:%d:%d",
 720                      &joystick_keymap.x_axis,
 721                      &joystick_keymap.y_axis,
 722                      &joystick_keymap.a_button,
 723                      &joystick_keymap.b_button,
 724                      &joystick_keymap.start_button) != 5)
 725             {
 726               puts("Warning: Invalid or incomplete joymap, should be: 'XAXIS:YAXIS:A:B:START'");
 727             }
 728           else
 729             {
 730               std::cout << "Using new joymap:\n"
 731                         << "  X-Axis:       " << joystick_keymap.x_axis << "\n"
 732                         << "  Y-Axis:       " << joystick_keymap.y_axis << "\n"
 733                         << "  A-Button:     " << joystick_keymap.a_button << "\n"
 734                         << "  B-Button:     " << joystick_keymap.b_button << "\n"
 735                         << "  Start-Button: " << joystick_keymap.start_button << std::endl;
 736             }
 737         }
 738       else if (strcmp(argv[i], "--leveleditor") == 0)
 739         {
 740           launch_leveleditor_mode = true;
 741         }
 742       else if (strcmp(argv[i], "--worldmap") == 0)
 743         {
 744           launch_worldmap_mode = true;
 745         }
 746       else if (strcmp(argv[i], "--flip-levels") == 0)
 747         {
 748           flip_levels_mode = true;
 749         }
 750       else if (strcmp(argv[i], "--datadir") == 0
 751                || strcmp(argv[i], "-d") == 0 )
 752         {
 753           assert(i+1 < argc);
 754           datadir = argv[++i];
 755         }
 756       else if (strcmp(argv[i], "--show-fps") == 0)
 757         {
 758           /* Use full screen: */
 759           show_fps = true;
 760         }
 761       else if (strcmp(argv[i], "--opengl") == 0 ||
 762                strcmp(argv[i], "-gl") == 0)
 763         {
 764 #ifndef NOOPENGL
 765           /* Use OpengGL: */
 766           use_gl = true;
 767 #endif
 768         }
 769       else if (strcmp(argv[i], "--sdl") == 0)
 770           {
 771             use_gl = false;
 772           }
 773       else if (strcmp(argv[i], "--usage") == 0)
 774         {
 775           /* Show usage: */
 776           usage(argv[0], 0);
 777         }
 778       else if (strcmp(argv[i], "--version") == 0)
 779         {
 780           /* Show version: */
 781           printf((package_name + " " + package_version + "\n").c_str() );
 782           exit(0);
 783         }
 784       else if (strcmp(argv[i], "--disable-sound") == 0)
 785         {
 786           /* Disable the compiled in sound feature */
 787           printf("Sounds disabled \n");
 788           SoundManager::get()->enable_sound(false);
 789         }
 790       else if (strcmp(argv[i], "--disable-music") == 0)
 791         {
 792           /* Disable the compiled in sound feature */
 793           printf("Music disabled \n");
 794           SoundManager::get()->enable_music(false);
 795         }
 796       else if (strcmp(argv[i], "--debug") == 0)
 797         {
 798           /* Enable the debug-mode */
 799           debug_mode = true;
 800
 801         }
 802       else if (strcmp(argv[i], "--help") == 0)
 803         {     /* Show help: */
 804           puts(_(("  SuperTux  " + package_version + "\n"
 805                "  Please see the file \"README.txt\" for more details.\n").c_str()));
 806           printf(_("Usage: %s [OPTIONS] FILENAME\n\n"), argv[0]);
 807           puts(_("Display Options:\n"
 808                "  -f, --fullscreen    Run in fullscreen mode.\n"
 809                "  -w, --window        Run in window mode.\n"
 810                "  --opengl            If OpenGL support was compiled in, this will tell\n"
 811                "                      SuperTux to make use of it.\n"
 812                "  --sdl               Use the SDL software graphical renderer\n"
 813                "  --geometry WIDTHxHEIGHT Run SuperTux in the given resolution\n"
 814                "\n"
 815                "Sound Options:\n"
 816                "  --disable-sound     If sound support was compiled in,  this will\n"
 817                "                      disable sound for this session of the game.\n"
 818                "  --disable-music     Like above, but this will disable music.\n"
 819                "\n"
 820                "Misc Options:\n"
 821                "  -j, --joystick NUM  Use joystick NUM (default: 0)\n"
 822                "  --joymap XAXIS:YAXIS:A:B:START\n"
 823                "                      Define how joystick buttons and axis should be mapped\n"
 824                "  --leveleditor       Opens the leveleditor in a file.\n"
 825                "  --worldmap          Opens the specified worldmap file.\n"
 826                "  --flip-levels       Flip levels upside-down.\n"
 827                "  -d, --datadir DIR   Load Game data from DIR (default: automatic)\n"
 828                "  --debug             Enables the debug mode, which is useful for developers.\n"
 829                "  --help              Display a help message summarizing command-line\n"
 830                "                      options, license and game controls.\n"
 831                "  --usage             Display a brief message summarizing command-line options.\n"
 832                "  --version           Display the version of SuperTux you're running.\n\n"
 833                ));
 834           exit(0);
 835         }
 836       else if (argv[i][0] != '-')
 837         {
 838           level_startup_file = argv[i];
 839         }
 840       else
 841         {
 842           /* Unknown - complain! */
 843
 844           usage(argv[0], 1);
 845         }
 846     }
 847 }
 848
 849
 850 /* Display usage: */
 851
 852 void usage(char * prog, int ret)
 853 {
 854   FILE * fi;
 855
 856
 857   /* Determine which stream to write to: */
 858
 859   if (ret == 0)
 860     fi = stdout;
 861   else
 862     fi = stderr;
 863
 864
 865   /* Display the usage message: */
 866
 867   fprintf(fi, _("Usage: %s [--fullscreen] [--opengl] [--geometry WIDTHxHEIGHT] [--disable-sound] [--disable-music] [--debug] | [--usage | --help | --version] [--leveleditor] [--worldmap] [--flip-levels] FILENAME\n"),
 868           prog);
 869
 870
 871   /* Quit! */
 872
 873   exit(ret);
 874 }
 875
 876 std::set<std::string> FileSystem::read_directory(const std::string& pathname)
 877 {
 878   std::set<std::string> dirnames;
 879
 880   DIR* dir = opendir(pathname.c_str());
 881   if (dir)
 882     {
 883       struct dirent *direntp;
 884
 885       while((direntp = readdir(dir)))
 886         {
 887           dirnames.insert(direntp->d_name);
 888         }
 889
 890       closedir(dir);
 891     }
 892
 893   return dirnames;
 894 }
 895
 896 /* EOF */