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