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