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