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