src/setup.cpp

   1 /*
   2   setup.c
   3
   4   Super Tux - Setup
   5
   6   by Bill Kendrick
   7   bill@newbreedsoftware.com
   8   http://www.newbreedsoftware.com/supertux/
   9
  10   April 11, 2000 - March 15, 2004
  11 */
  12
  13 #include <assert.h>
  14 #include <stdio.h>
  15 #include <stdlib.h>
  16 #include <string.h>
  17 #include <errno.h>
  18 #include <unistd.h>
  19 #include <SDL.h>
  20 #include <SDL_image.h>
  21 #ifndef NOOPENGL
  22 #include <SDL_opengl.h>
  23 #endif
  24
  25 #include <sys/stat.h>
  26 #include <sys/types.h>
  27 #include <dirent.h>
  28 #ifndef WIN32
  29 #include <libgen.h>
  30 #endif
  31 #include <ctype.h>
  32
  33 #include "defines.h"
  34 #include "globals.h"
  35 #include "setup.h"
  36 #include "screen.h"
  37 #include "texture.h"
  38 #include "menu.h"
  39 #include "gameloop.h"
  40 #include "configfile.h"
  41 #include "scene.h"
  42
  43 #ifdef WIN32
  44 #define mkdir(dir, mode)    mkdir(dir)
  45 // on win32 we typically don't want LFS paths
  46 #undef DATA_PREFIX
  47 #define DATA_PREFIX "./data/"
  48 #endif
  49
  50 /* Local function prototypes: */
  51
  52 void seticon(void);
  53 void usage(char * prog, int ret);
  54
  55 /* Does the given file exist and is it accessible? */
  56 int faccessible(const char *filename)
  57 {
  58   struct stat filestat;
  59   if (stat(filename, &filestat) == -1)
  60     {
  61       return false;
  62     }
  63   else
  64     {
  65       if(S_ISREG(filestat.st_mode))
  66         return true;
  67       else
  68         return false;
  69     }
  70 }
  71
  72 /* Can we write to this location? */
  73 int fwriteable(const char *filename)
  74 {
  75   FILE* fi;
  76   fi = fopen(filename, "wa");
  77   if (fi == NULL)
  78     {
  79       return false;
  80     }
  81   return true;
  82 }
  83
  84 /* Makes sure a directory is created in either the SuperTux home directory or the SuperTux base directory.*/
  85 int fcreatedir(const char* relative_dir)
  86 {
  87   char path[1024];
  88   snprintf(path, 1024, "%s/%s/", st_dir, relative_dir);
  89   if(mkdir(path,0755) != 0)
  90     {
  91       snprintf(path, 1024, "%s/%s/", datadir.c_str(), relative_dir);
  92       if(mkdir(path,0755) != 0)
  93         {
  94           return false;
  95         }
  96       else
  97         {
  98           return true;
  99         }
 100     }
 101   else
 102     {
 103       return true;
 104     }
 105 }
 106
 107 FILE * opendata(const char * rel_filename, const char * mode)
 108 {
 109   char * filename = NULL;
 110   FILE * fi;
 111
 112   filename = (char *) malloc(sizeof(char) * (strlen(st_dir) +
 113                                              strlen(rel_filename) + 1));
 114
 115   strcpy(filename, st_dir);
 116   /* Open the high score file: */
 117
 118   strcat(filename, rel_filename);
 119
 120   /* Try opening the file: */
 121   fi = fopen(filename, mode);
 122
 123   if (fi == NULL)
 124     {
 125       fprintf(stderr, "Warning: Unable to open the file \"%s\" ", filename);
 126
 127       if (strcmp(mode, "r") == 0)
 128         fprintf(stderr, "for read!!!\n");
 129       else if (strcmp(mode, "w") == 0)
 130         fprintf(stderr, "for write!!!\n");
 131     }
 132   free( filename );
 133
 134   return(fi);
 135 }
 136
 137 /* Get all names of sub-directories in a certain directory. */
 138 /* Returns the number of sub-directories found. */
 139 /* Note: The user has to free the allocated space. */
 140 string_list_type dsubdirs(const char *rel_path,const  char* expected_file)
 141 {
 142   DIR *dirStructP;
 143   struct dirent *direntp;
 144   string_list_type sdirs;
 145   char filename[1024];
 146   char path[1024];
 147
 148   string_list_init(&sdirs);
 149   sprintf(path,"%s/%s",st_dir,rel_path);
 150   if((dirStructP = opendir(path)) != NULL)
 151     {
 152       while((direntp = readdir(dirStructP)) != NULL)
 153         {
 154           char absolute_filename[1024];
 155           struct stat buf;
 156
 157           sprintf(absolute_filename, "%s/%s", path, direntp->d_name);
 158
 159           if (stat(absolute_filename, &buf) == 0 && S_ISDIR(buf.st_mode))
 160             {
 161               if(expected_file != NULL)
 162                 {
 163                   sprintf(filename,"%s/%s/%s",path,direntp->d_name,expected_file);
 164                   if(!faccessible(filename))
 165                     continue;
 166                 }
 167
 168               string_list_add_item(&sdirs,direntp->d_name);
 169             }
 170         }
 171       closedir(dirStructP);
 172     }
 173
 174   sprintf(path,"%s/%s",datadir.c_str(),rel_path);
 175   if((dirStructP = opendir(path)) != NULL)
 176     {
 177       while((direntp = readdir(dirStructP)) != NULL)
 178         {
 179           char absolute_filename[1024];
 180           struct stat buf;
 181
 182           sprintf(absolute_filename, "%s/%s", path, direntp->d_name);
 183
 184           if (stat(absolute_filename, &buf) == 0 && S_ISDIR(buf.st_mode))
 185             {
 186               if(expected_file != NULL)
 187                 {
 188                   sprintf(filename,"%s/%s/%s",path,direntp->d_name,expected_file);
 189                   if(!faccessible(filename))
 190                     {
 191                       continue;
 192                     }
 193                   else
 194                     {
 195                       sprintf(filename,"%s/%s/%s/%s",st_dir,rel_path,direntp->d_name,expected_file);
 196                       if(faccessible(filename))
 197                         continue;
 198                     }
 199                 }
 200
 201               string_list_add_item(&sdirs,direntp->d_name);
 202             }
 203         }
 204       closedir(dirStructP);
 205     }
 206
 207   return sdirs;
 208 }
 209
 210 string_list_type dfiles(const char *rel_path, const  char* glob, const  char* exception_str)
 211 {
 212   DIR *dirStructP;
 213   struct dirent *direntp;
 214   string_list_type sdirs;
 215   char path[1024];
 216
 217   string_list_init(&sdirs);
 218   sprintf(path,"%s/%s",st_dir,rel_path);
 219   if((dirStructP = opendir(path)) != NULL)
 220     {
 221       while((direntp = readdir(dirStructP)) != NULL)
 222         {
 223           char absolute_filename[1024];
 224           struct stat buf;
 225
 226           sprintf(absolute_filename, "%s/%s", path, direntp->d_name);
 227
 228           if (stat(absolute_filename, &buf) == 0 && S_ISREG(buf.st_mode))
 229             {
 230               if(exception_str != NULL)
 231                 {
 232                   if(strstr(direntp->d_name,exception_str) != NULL)
 233                     continue;
 234                 }
 235               if(glob != NULL)
 236                 if(strstr(direntp->d_name,glob) == NULL)
 237                   continue;
 238
 239               string_list_add_item(&sdirs,direntp->d_name);
 240             }
 241         }
 242       closedir(dirStructP);
 243     }
 244
 245   sprintf(path,"%s/%s",datadir.c_str(),rel_path);
 246   if((dirStructP = opendir(path)) != NULL)
 247     {
 248       while((direntp = readdir(dirStructP)) != NULL)
 249         {
 250           char absolute_filename[1024];
 251           struct stat buf;
 252
 253           sprintf(absolute_filename, "%s/%s", path, direntp->d_name);
 254
 255           if (stat(absolute_filename, &buf) == 0 && S_ISREG(buf.st_mode))
 256             {
 257               if(exception_str != NULL)
 258                 {
 259                   if(strstr(direntp->d_name,exception_str) != NULL)
 260                     continue;
 261                 }
 262               if(glob != NULL)
 263                 if(strstr(direntp->d_name,glob) == NULL)
 264                   continue;
 265
 266               string_list_add_item(&sdirs,direntp->d_name);
 267             }
 268         }
 269       closedir(dirStructP);
 270     }
 271
 272   return sdirs;
 273 }
 274
 275 void free_strings(char **strings, int num)
 276 {
 277   int i;
 278   for(i=0; i < num; ++i)
 279     free(strings[i]);
 280 }
 281
 282 /* --- SETUP --- */
 283 /* Set SuperTux configuration and save directories */
 284 void st_directory_setup(void)
 285 {
 286   char *home;
 287   char str[1024];
 288   /* Get home directory (from $HOME variable)... if we can't determine it,
 289      use the current directory ("."): */
 290   if (getenv("HOME") != NULL)
 291     home = getenv("HOME");
 292   else
 293     home = ".";
 294
 295   st_dir = (char *) malloc(sizeof(char) * (strlen(home) +
 296                                            strlen("/.supertux") + 1));
 297   strcpy(st_dir, home);
 298   strcat(st_dir, "/.supertux");
 299
 300   /* Remove .supertux config-file from old SuperTux versions */
 301   if(faccessible(st_dir))
 302     {
 303       remove
 304         (st_dir);
 305     }
 306
 307   st_save_dir = (char *) malloc(sizeof(char) * (strlen(st_dir) + strlen("/save") + 1));
 308
 309   strcpy(st_save_dir,st_dir);
 310   strcat(st_save_dir,"/save");
 311
 312   /* Create them. In the case they exist they won't destroy anything. */
 313   mkdir(st_dir, 0755);
 314   mkdir(st_save_dir, 0755);
 315
 316   sprintf(str, "%s/levels", st_dir);
 317   mkdir(str, 0755);
 318
 319   // User has not that a datadir, so we try some magic
 320   if (datadir.empty())
 321     {
 322 #ifndef WIN32
 323       // Detect datadir
 324       char exe_file[PATH_MAX];
 325       if (readlink("/proc/self/exe", exe_file, PATH_MAX) < 0)
 326         {
 327           puts("Couldn't read /proc/self/exe, using default path: " DATA_PREFIX);
 328           datadir = DATA_PREFIX;
 329         }
 330       else
 331         {
 332           std::string exedir = std::string(dirname(exe_file)) + "/";
 333
 334           datadir = exedir + "../data/"; // SuperTux run from source dir
 335           if (access(datadir.c_str(), F_OK) != 0)
 336             {
 337               datadir = exedir + "../share/supertux/"; // SuperTux run from PATH
 338               if (access(datadir.c_str(), F_OK) != 0)
 339                 { // If all fails, fall back to compiled path
 340                   datadir = DATA_PREFIX;
 341                 }
 342             }
 343         }
 344 #else
 345   datadir = DATA_PREFIX;
 346 #endif
 347     }
 348   printf("Datadir: %s\n", datadir.c_str());
 349 }
 350
 351 /* Create and setup menus. */
 352 void st_menu(void)
 353 {
 354   main_menu      = new Menu();
 355   options_menu   = new Menu();
 356   options_controls_menu   = new Menu();
 357   load_game_menu = new Menu();
 358   save_game_menu = new Menu();
 359   game_menu      = new Menu();
 360   highscore_menu = new Menu();
 361
 362   main_menu->additem(MN_LABEL,"Main Menu",0,0);
 363   main_menu->additem(MN_HL,"",0,0);
 364   main_menu->additem(MN_ACTION,"Start Game",0,0);
 365   main_menu->additem(MN_GOTO,"Load Game",0,load_game_menu);
 366   main_menu->additem(MN_GOTO,"Options",0,options_menu);
 367   main_menu->additem(MN_ACTION,"Level editor",0,0);
 368   main_menu->additem(MN_ACTION,"Credits",0,0);
 369   main_menu->additem(MN_HL,"",0,0);
 370   main_menu->additem(MN_ACTION,"Quit",0,0);
 371
 372   options_menu->additem(MN_LABEL,"Options",0,0);
 373   options_menu->additem(MN_HL,"",0,0);
 374   options_menu->additem(MN_TOGGLE,"Fullscreen",use_fullscreen,0);
 375   if(audio_device)
 376     {
 377       options_menu->additem(MN_TOGGLE,"Sound     ",use_sound,0);
 378       options_menu->additem(MN_TOGGLE,"Music     ",use_music,0);
 379     }
 380   else
 381     {
 382       options_menu->additem(MN_DEACTIVE,"Sound     ",use_sound,0);
 383       options_menu->additem(MN_DEACTIVE,"Music     ",use_music,0);
 384     }
 385   options_menu->additem(MN_TOGGLE,"Show FPS  ",show_fps,0);
 386   options_menu->additem(MN_GOTO,"Controls  ",0,options_controls_menu);
 387   options_menu->additem(MN_HL,"",0,0);
 388   options_menu->additem(MN_BACK,"Back",0,0);
 389
 390   options_controls_menu->additem(MN_LABEL,"Controls",0,0);
 391   options_controls_menu->additem(MN_HL,"",0,0);
 392   options_controls_menu->additem(MN_CONTROLFIELD,"Move Right",tux.keymap.right,0);
 393   options_controls_menu->additem(MN_HL,"",0,0);
 394   options_controls_menu->additem(MN_BACK,"Back",0,0);
 395
 396   load_game_menu->additem(MN_LABEL,"Load Game",0,0);
 397   load_game_menu->additem(MN_HL,"",0,0);
 398   load_game_menu->additem(MN_DEACTIVE,"Slot 1",0,0);
 399   load_game_menu->additem(MN_DEACTIVE,"Slot 2",0,0);
 400   load_game_menu->additem(MN_DEACTIVE,"Slot 3",0,0);
 401   load_game_menu->additem(MN_DEACTIVE,"Slot 4",0,0);
 402   load_game_menu->additem(MN_DEACTIVE,"Slot 5",0,0);
 403   load_game_menu->additem(MN_HL,"",0,0);
 404   load_game_menu->additem(MN_BACK,"Back",0,0);
 405
 406   save_game_menu->additem(MN_LABEL,"Save Game",0,0);
 407   save_game_menu->additem(MN_HL,"",0,0);
 408   save_game_menu->additem(MN_DEACTIVE,"Slot 1",0,0);
 409   save_game_menu->additem(MN_DEACTIVE,"Slot 2",0,0);
 410   save_game_menu->additem(MN_DEACTIVE,"Slot 3",0,0);
 411   save_game_menu->additem(MN_DEACTIVE,"Slot 4",0,0);
 412   save_game_menu->additem(MN_DEACTIVE,"Slot 5",0,0);
 413   save_game_menu->additem(MN_HL,"",0,0);
 414   save_game_menu->additem(MN_BACK,"Back",0,0);
 415
 416   game_menu->additem(MN_LABEL,"InGame Menu",0,0);
 417   game_menu->additem(MN_HL,"",0,0);
 418   game_menu->additem(MN_ACTION,"Return To Game",0,0);
 419   game_menu->additem(MN_GOTO,"Save Game",0,save_game_menu);
 420   game_menu->additem(MN_GOTO,"Load Game",0,load_game_menu);
 421   game_menu->additem(MN_GOTO,"Options",0,options_menu);
 422   game_menu->additem(MN_HL,"",0,0);
 423   game_menu->additem(MN_ACTION,"Quit Game",0,0);
 424
 425   highscore_menu->additem(MN_TEXTFIELD,"Enter your name:",0,0);
 426 }
 427
 428 void update_load_save_game_menu(Menu* pmenu, int load)
 429 {
 430   for(int i = 2; i < 7; ++i)
 431     {
 432       char *tmp;
 433       slotinfo(&tmp,i-1);
 434       if(load && strlen(tmp) == strlen("Slot X - Free") )
 435         pmenu->item[i].kind = MN_DEACTIVE;
 436       else
 437         pmenu->item[i].kind = MN_ACTION;
 438       menu_item_change_text(&pmenu->item[i],tmp);
 439       free(tmp);
 440     }
 441 }
 442
 443 void process_save_load_game_menu(int save)
 444 {
 445   int slot;
 446   switch (slot = (save ? save_game_menu->check() : load_game_menu->check()))
 447     {
 448     default:
 449       if(slot != -1)
 450         {
 451           if(save)
 452             {
 453               savegame(slot - 1);
 454             }
 455           else
 456             {
 457               if (game_started)
 458                 {
 459                   gameloop("default",slot - 1,ST_GL_LOAD_GAME);
 460                   show_menu = true;
 461                   Menu::set_current(main_menu);
 462                 }
 463               else
 464                 loadgame(slot - 1);
 465             }
 466           st_pause_ticks_stop();
 467         }
 468       break;
 469     }
 470 }
 471
 472 /* Handle changes made to global settings in the options menu. */
 473 void process_options_menu(void)
 474 {
 475   switch (options_menu->check())
 476     {
 477     case 2:
 478       if(use_fullscreen != options_menu->item[2].toggled)
 479         {
 480           use_fullscreen = !use_fullscreen;
 481           st_video_setup();
 482         }
 483       break;
 484     case 3:
 485       if(use_sound != options_menu->item[3].toggled)
 486         use_sound = !use_sound;
 487       break;
 488     case 4:
 489       if(use_music != options_menu->item[4].toggled)
 490         {
 491           if(use_music)
 492             {
 493               if(playing_music())
 494                 {
 495                   halt_music();
 496                 }
 497               use_music = false;
 498             }
 499           else
 500             {
 501               use_music = true;
 502               if (!playing_music())
 503                 {
 504                   play_current_music();
 505                 }
 506             }
 507         }
 508       break;
 509     case 5:
 510       if(show_fps != options_menu->item[5].toggled)
 511         show_fps = !show_fps;
 512       break;
 513     }
 514 }
 515
 516 void st_general_setup(void)
 517 {
 518   /* Seed random number generator: */
 519
 520   srand(SDL_GetTicks());
 521
 522   /* Set icon image: */
 523
 524   seticon();
 525
 526   /* Unicode needed for input handling: */
 527
 528   SDL_EnableUNICODE(1);
 529
 530   /* Load global images: */
 531
 532   text_load(&black_text, datadir + "/images/status/letters-black.png", TEXT_TEXT, 16,18);
 533   text_load(&gold_text,datadir + "/images/status/letters-gold.png", TEXT_TEXT, 16,18);
 534   text_load(&blue_text,datadir + "/images/status/letters-blue.png", TEXT_TEXT, 16,18);
 535   text_load(&red_text,datadir + "/images/status/letters-red.png", TEXT_TEXT, 16,18);
 536   text_load(&white_text,datadir + "/images/status/letters-white.png", TEXT_TEXT, 16,18);
 537   text_load(&white_small_text,datadir + "/images/status/letters-white-small.png", TEXT_TEXT, 8,9);
 538   text_load(&white_big_text,datadir + "/images/status/letters-white-big.png", TEXT_TEXT, 20,23);
 539   text_load(&yellow_nums,datadir + "/images/status/numbers.png", TEXT_NUM, 32,32);
 540
 541   /* Load GUI/menu images: */
 542   texture_load(&checkbox, datadir + "/images/status/checkbox.png", USE_ALPHA);
 543   texture_load(&checkbox_checked, datadir + "/images/status/checkbox-checked.png", USE_ALPHA);
 544   texture_load(&back, datadir + "/images/status/back.png", USE_ALPHA);
 545   texture_load(&arrow_left, datadir + "/images/icons/left.png", USE_ALPHA);
 546   texture_load(&arrow_right, datadir + "/images/icons/right.png", USE_ALPHA);
 547
 548   /* Load the mouse-cursor */
 549   mouse_cursor = new MouseCursor( datadir + "/images/status/mousecursor.png",1);
 550
 551 }
 552
 553 void st_general_free(void)
 554 {
 555
 556   /* Free global images: */
 557
 558   text_free(&black_text);
 559   text_free(&gold_text);
 560   text_free(&white_text);
 561   text_free(&blue_text);
 562   text_free(&red_text);
 563   text_free(&white_small_text);
 564   text_free(&white_big_text);
 565
 566   /* Free GUI/menu images: */
 567   texture_free(&checkbox);
 568   texture_free(&checkbox_checked);
 569   texture_free(&back);
 570   texture_free(&arrow_left);
 571   texture_free(&arrow_right);
 572
 573   /* Free mouse-cursor */
 574   delete mouse_cursor;
 575
 576   /* Free menus */
 577   delete main_menu;
 578   delete game_menu;
 579   delete options_menu;
 580   delete highscore_menu;
 581   delete save_game_menu;
 582   delete load_game_menu;
 583 }
 584
 585 void st_video_setup(void)
 586 {
 587
 588   if(screen != NULL)
 589     SDL_FreeSurface(screen);
 590
 591   /* Init SDL Video: */
 592
 593   if (SDL_Init(SDL_INIT_VIDEO) < 0)
 594     {
 595       fprintf(stderr,
 596               "\nError: I could not initialize video!\n"
 597               "The Simple DirectMedia error that occured was:\n"
 598               "%s\n\n", SDL_GetError());
 599       exit(1);
 600     }
 601
 602   /* Open display: */
 603
 604   if(use_gl)
 605     st_video_setup_gl();
 606   else
 607     st_video_setup_sdl();
 608
 609   texture_setup();
 610
 611   /* Set window manager stuff: */
 612
 613   SDL_WM_SetCaption("Super Tux", "Super Tux");
 614
 615 }
 616
 617 void st_video_setup_sdl(void)
 618 {
 619   SDL_FreeSurface(screen);
 620
 621   if (use_fullscreen)
 622     {
 623       screen = SDL_SetVideoMode(640, 480, 0, SDL_FULLSCREEN ) ; /* | SDL_HWSURFACE); */
 624       if (screen == NULL)
 625         {
 626           fprintf(stderr,
 627                   "\nWarning: I could not set up fullscreen video for "
 628                   "640x480 mode.\n"
 629                   "The Simple DirectMedia error that occured was:\n"
 630                   "%s\n\n", SDL_GetError());
 631           use_fullscreen = false;
 632         }
 633     }
 634   else
 635     {
 636       screen = SDL_SetVideoMode(640, 480, 0, SDL_HWSURFACE | SDL_DOUBLEBUF );
 637
 638       if (screen == NULL)
 639         {
 640           fprintf(stderr,
 641                   "\nError: I could not set up video for 640x480 mode.\n"
 642                   "The Simple DirectMedia error that occured was:\n"
 643                   "%s\n\n", SDL_GetError());
 644           exit(1);
 645         }
 646     }
 647 }
 648
 649 void st_video_setup_gl(void)
 650 {
 651 #ifndef NOOPENGL
 652
 653   SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 5);
 654   SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 5);
 655   SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 5);
 656   SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
 657   SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
 658
 659   if (use_fullscreen)
 660     {
 661       screen = SDL_SetVideoMode(640, 480, 0, SDL_FULLSCREEN | SDL_OPENGL) ; /* | SDL_HWSURFACE); */
 662       if (screen == NULL)
 663         {
 664           fprintf(stderr,
 665                   "\nWarning: I could not set up fullscreen video for "
 666                   "640x480 mode.\n"
 667                   "The Simple DirectMedia error that occured was:\n"
 668                   "%s\n\n", SDL_GetError());
 669           use_fullscreen = false;
 670         }
 671     }
 672   else
 673     {
 674       screen = SDL_SetVideoMode(640, 480, 0, SDL_OPENGL);
 675
 676       if (screen == NULL)
 677         {
 678           fprintf(stderr,
 679                   "\nError: I could not set up video for 640x480 mode.\n"
 680                   "The Simple DirectMedia error that occured was:\n"
 681                   "%s\n\n", SDL_GetError());
 682           exit(1);
 683         }
 684     }
 685
 686   /*
 687    * Set up OpenGL for 2D rendering.
 688    */
 689   glDisable(GL_DEPTH_TEST);
 690   glDisable(GL_CULL_FACE);
 691
 692   glViewport(0, 0, screen->w, screen->h);
 693   glMatrixMode(GL_PROJECTION);
 694   glLoadIdentity();
 695   glOrtho(0, screen->w, screen->h, 0, -1.0, 1.0);
 696
 697   glMatrixMode(GL_MODELVIEW);
 698   glLoadIdentity();
 699   glTranslatef(0.0f, 0.0f, 0.0f);
 700
 701 #endif
 702
 703 }
 704
 705 void st_joystick_setup(void)
 706 {
 707
 708   /* Init Joystick: */
 709
 710   use_joystick = true;
 711
 712   if (SDL_Init(SDL_INIT_JOYSTICK) < 0)
 713     {
 714       fprintf(stderr, "Warning: I could not initialize joystick!\n"
 715               "The Simple DirectMedia error that occured was:\n"
 716               "%s\n\n", SDL_GetError());
 717
 718       use_joystick = false;
 719     }
 720   else
 721     {
 722       /* Open joystick: */
 723       if (SDL_NumJoysticks() <= 0)
 724         {
 725           fprintf(stderr, "Warning: No joysticks are available.\n");
 726
 727           use_joystick = false;
 728         }
 729       else
 730         {
 731           js = SDL_JoystickOpen(joystick_num);
 732
 733           if (js == NULL)
 734             {
 735               fprintf(stderr, "Warning: Could not open joystick %d.\n"
 736                       "The Simple DirectMedia error that occured was:\n"
 737                       "%s\n\n", joystick_num, SDL_GetError());
 738
 739               use_joystick = false;
 740             }
 741           else
 742             {
 743               /* Check for proper joystick configuration: */
 744
 745               if (SDL_JoystickNumAxes(js) < 2)
 746                 {
 747                   fprintf(stderr,
 748                           "Warning: Joystick does not have enough axes!\n");
 749
 750                   use_joystick = false;
 751                 }
 752               else
 753                 {
 754                   if (SDL_JoystickNumButtons(js) < 2)
 755                     {
 756                       fprintf(stderr,
 757                               "Warning: "
 758                               "Joystick does not have enough buttons!\n");
 759
 760                       use_joystick = false;
 761                     }
 762                 }
 763             }
 764         }
 765     }
 766 }
 767
 768 void st_audio_setup(void)
 769 {
 770
 771   /* Init SDL Audio silently even if --disable-sound : */
 772
 773   if (audio_device)
 774     {
 775       if (SDL_Init(SDL_INIT_AUDIO) < 0)
 776         {
 777           /* only print out message if sound or music
 778              was not disabled at command-line
 779            */
 780           if (use_sound || use_music)
 781             {
 782               fprintf(stderr,
 783                       "\nWarning: I could not initialize audio!\n"
 784                       "The Simple DirectMedia error that occured was:\n"
 785                       "%s\n\n", SDL_GetError());
 786             }
 787           /* keep the programming logic the same :-)
 788              because in this case, use_sound & use_music' values are ignored
 789              when there's no available audio device
 790           */
 791           use_sound = false;
 792           use_music = false;
 793           audio_device = false;
 794         }
 795     }
 796
 797
 798   /* Open sound silently regarless the value of "use_sound": */
 799
 800   if (audio_device)
 801     {
 802       if (open_audio(44100, AUDIO_S16, 2, 2048) < 0)
 803         {
 804           /* only print out message if sound or music
 805              was not disabled at command-line
 806            */
 807           if (use_sound || use_music)
 808             {
 809               fprintf(stderr,
 810                       "\nWarning: I could not set up audio for 44100 Hz "
 811                       "16-bit stereo.\n"
 812                       "The Simple DirectMedia error that occured was:\n"
 813                       "%s\n\n", SDL_GetError());
 814             }
 815           use_sound = false;
 816           use_music = false;
 817           audio_device = false;
 818         }
 819     }
 820
 821 }
 822
 823
 824 /* --- SHUTDOWN --- */
 825
 826 void st_shutdown(void)
 827 {
 828   close_audio();
 829   SDL_Quit();
 830   saveconfig();
 831 }
 832
 833 /* --- ABORT! --- */
 834
 835 void st_abort(const std::string& reason, const std::string& details)
 836 {
 837   fprintf(stderr, "\nError: %s\n%s\n\n", reason.c_str(), details.c_str());
 838   st_shutdown();
 839   abort();
 840 }
 841
 842
 843 /* Set Icon (private) */
 844
 845 void seticon(void)
 846 {
 847   int masklen;
 848   Uint8 * mask;
 849   SDL_Surface * icon;
 850
 851
 852   /* Load icon into a surface: */
 853
 854   icon = IMG_Load((datadir + "/images/icon.png").c_str());
 855   if (icon == NULL)
 856     {
 857       fprintf(stderr,
 858               "\nError: I could not load the icon image: %s%s\n"
 859               "The Simple DirectMedia error that occured was:\n"
 860               "%s\n\n", datadir.c_str(), "/images/icon.png", SDL_GetError());
 861       exit(1);
 862     }
 863
 864
 865   /* Create mask: */
 866
 867   masklen = (((icon -> w) + 7) / 8) * (icon -> h);
 868   mask = (Uint8*) malloc(masklen * sizeof(Uint8));
 869   memset(mask, 0xFF, masklen);
 870
 871
 872   /* Set icon: */
 873
 874   SDL_WM_SetIcon(icon, mask);
 875
 876
 877   /* Free icon surface & mask: */
 878
 879   free(mask);
 880   SDL_FreeSurface(icon);
 881 }
 882
 883
 884 /* Parse command-line arguments: */
 885
 886 void parseargs(int argc, char * argv[])
 887 {
 888   int i;
 889
 890   loadconfig();
 891
 892   /* Parse arguments: */
 893
 894   for (i = 1; i < argc; i++)
 895     {
 896       if (strcmp(argv[i], "--fullscreen") == 0 ||
 897           strcmp(argv[i], "-f") == 0)
 898         {
 899           /* Use full screen: */
 900
 901           use_fullscreen = true;
 902         }
 903       else if (strcmp(argv[i], "--joystick") == 0 || strcmp(argv[i], "-j") == 0)
 904         {
 905           assert(i+1 < argc);
 906           joystick_num = atoi(argv[++i]);
 907         }
 908       else if (strcmp(argv[i], "--worldmap") == 0)
 909         {
 910           launch_worldmap_mode = true;
 911         }
 912       else if (strcmp(argv[i], "--datadir") == 0
 913                || strcmp(argv[i], "-d") == 0 )
 914         {
 915           assert(i+1 < argc);
 916           datadir = argv[++i];
 917         }
 918       else if (strcmp(argv[i], "--show-fps") == 0)
 919         {
 920           /* Use full screen: */
 921
 922           show_fps = true;
 923         }
 924       else if (strcmp(argv[i], "--opengl") == 0 ||
 925                strcmp(argv[i], "-gl") == 0)
 926         {
 927 #ifndef NOOPENGL
 928           /* Use OpengGL: */
 929
 930           use_gl = true;
 931 #endif
 932
 933         }
 934       else if (strcmp(argv[i], "--usage") == 0)
 935         {
 936           /* Show usage: */
 937
 938           usage(argv[0], 0);
 939         }
 940       else if (strcmp(argv[i], "--version") == 0)
 941         {
 942           /* Show version: */
 943
 944           printf("Super Tux - version " VERSION "\n");
 945           exit(0);
 946         }
 947       else if (strcmp(argv[i], "--disable-sound") == 0)
 948         {
 949           /* Disable the compiled in sound feature */
 950           printf("Sounds disabled \n");
 951           use_sound = false;
 952         }
 953       else if (strcmp(argv[i], "--disable-music") == 0)
 954         {
 955           /* Disable the compiled in sound feature */
 956           printf("Music disabled \n");
 957           use_music = false;
 958         }
 959       else if (strcmp(argv[i], "--debug-mode") == 0)
 960         {
 961           /* Enable the debug-mode */
 962           debug_mode = true;
 963
 964         }
 965       else if (strcmp(argv[i], "--help") == 0)
 966         {     /* Show help: */
 967           puts("Super Tux " VERSION "\n"
 968                "  Please see the file \"README.txt\" for more details.\n");
 969           printf("Usage: %s [OPTIONS] FILENAME\n\n", argv[0]);
 970           puts("Display Options:\n"
 971                "  --fullscreen        Run in fullscreen mode.\n"
 972                "  --opengl            If opengl support was compiled in, this will enable\n"
 973                "                      the EXPERIMENTAL OpenGL mode.\n"
 974                "\n"
 975                "Sound Options:\n"
 976                "  --disable-sound     If sound support was compiled in,  this will\n"
 977                "                      disable sound for this session of the game.\n"
 978                "  --disable-music     Like above, but this will disable music.\n"
 979                "\n"
 980                "Misc Options:\n"
 981                "  -j, --joystick NUM  Use joystick NUM (default: 0)\n"
 982                "  --worldmap          Start in worldmap-mode (EXPERIMENTAL)\n"
 983                "  -d, --datadir DIR   Load Game data from DIR (default: automatic)\n"
 984                "  --debug-mode        Enables the debug-mode, which is useful for developers.\n"
 985                "  --help              Display a help message summarizing command-line\n"
 986                "                      options, license and game controls.\n"
 987                "  --usage             Display a brief message summarizing command-line options.\n"
 988                "  --version           Display the version of SuperTux you're running.\n\n"
 989                );
 990           exit(0);
 991         }
 992       else if (argv[i][0] != '-')
 993         {
 994           level_startup_file = argv[i];
 995         }
 996       else
 997         {
 998           /* Unknown - complain! */
 999
1000           usage(argv[0], 1);
1001         }
1002     }
1003 }
1004
1005
1006 /* Display usage: */
1007
1008 void usage(char * prog, int ret)
1009 {
1010   FILE * fi;
1011
1012
1013   /* Determine which stream to write to: */
1014
1015   if (ret == 0)
1016     fi = stdout;
1017   else
1018     fi = stderr;
1019
1020
1021   /* Display the usage message: */
1022
1023   fprintf(fi, "Usage: %s [--fullscreen] [--opengl] [--disable-sound] [--disable-music] [--debug-mode] | [--usage | --help | --version] [--worldmap] FILENAME\n",
1024           prog);
1025
1026
1027   /* Quit! */
1028
1029   exit(ret);
1030 }
1031