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->set_pos(screen->w/2, 335);
 363   main_menu->additem(MN_ACTION,"Start Game",0,0);
 364   main_menu->additem(MN_GOTO,"Load Game",0,load_game_menu);
 365   main_menu->additem(MN_GOTO,"Options",0,options_menu);
 366   main_menu->additem(MN_ACTION,"Level editor",0,0);
 367   main_menu->additem(MN_ACTION,"Credits",0,0);
 368   main_menu->additem(MN_ACTION,"Quit",0,0);
 369
 370   options_menu->additem(MN_LABEL,"Options",0,0);
 371   options_menu->additem(MN_HL,"",0,0);
 372   options_menu->additem(MN_TOGGLE,"Fullscreen",use_fullscreen,0);
 373   if(audio_device)
 374     {
 375       options_menu->additem(MN_TOGGLE,"Sound     ",use_sound,0);
 376       options_menu->additem(MN_TOGGLE,"Music     ",use_music,0);
 377     }
 378   else
 379     {
 380       options_menu->additem(MN_DEACTIVE,"Sound     ",use_sound,0);
 381       options_menu->additem(MN_DEACTIVE,"Music     ",use_music,0);
 382     }
 383   options_menu->additem(MN_TOGGLE,"Show FPS  ",show_fps,0);
 384   options_menu->additem(MN_GOTO,"Controls  ",0,options_controls_menu);
 385   options_menu->additem(MN_HL,"",0,0);
 386   options_menu->additem(MN_BACK,"Back",0,0);
 387
 388   options_controls_menu->additem(MN_LABEL,"Controls",0,0);
 389   options_controls_menu->additem(MN_HL,"",0,0);
 390   options_controls_menu->additem(MN_CONTROLFIELD,"Move Right",tux.keymap.right,0);
 391   options_controls_menu->additem(MN_HL,"",0,0);
 392   options_controls_menu->additem(MN_BACK,"Back",0,0);
 393
 394   load_game_menu->additem(MN_LABEL,"Load Game",0,0);
 395   load_game_menu->additem(MN_HL,"",0,0);
 396   load_game_menu->additem(MN_DEACTIVE,"Slot 1",0,0);
 397   load_game_menu->additem(MN_DEACTIVE,"Slot 2",0,0);
 398   load_game_menu->additem(MN_DEACTIVE,"Slot 3",0,0);
 399   load_game_menu->additem(MN_DEACTIVE,"Slot 4",0,0);
 400   load_game_menu->additem(MN_DEACTIVE,"Slot 5",0,0);
 401   load_game_menu->additem(MN_HL,"",0,0);
 402   load_game_menu->additem(MN_BACK,"Back",0,0);
 403
 404   save_game_menu->additem(MN_LABEL,"Save Game",0,0);
 405   save_game_menu->additem(MN_HL,"",0,0);
 406   save_game_menu->additem(MN_DEACTIVE,"Slot 1",0,0);
 407   save_game_menu->additem(MN_DEACTIVE,"Slot 2",0,0);
 408   save_game_menu->additem(MN_DEACTIVE,"Slot 3",0,0);
 409   save_game_menu->additem(MN_DEACTIVE,"Slot 4",0,0);
 410   save_game_menu->additem(MN_DEACTIVE,"Slot 5",0,0);
 411   save_game_menu->additem(MN_HL,"",0,0);
 412   save_game_menu->additem(MN_BACK,"Back",0,0);
 413
 414   game_menu->additem(MN_LABEL,"InGame Menu",0,0);
 415   game_menu->additem(MN_HL,"",0,0);
 416   game_menu->additem(MN_ACTION,"Return To Game",0,0);
 417   game_menu->additem(MN_GOTO,"Save Game",0,save_game_menu);
 418   game_menu->additem(MN_GOTO,"Load Game",0,load_game_menu);
 419   game_menu->additem(MN_GOTO,"Options",0,options_menu);
 420   game_menu->additem(MN_HL,"",0,0);
 421   game_menu->additem(MN_ACTION,"Quit Game",0,0);
 422
 423   highscore_menu->additem(MN_TEXTFIELD,"Enter your name:",0,0);
 424 }
 425
 426 void update_load_save_game_menu(Menu* pmenu, int load)
 427 {
 428   for(int i = 2; i < 7; ++i)
 429     {
 430       char *tmp;
 431       slotinfo(&tmp,i-1);
 432       if(load && strlen(tmp) == strlen("Slot X - Free") )
 433         pmenu->item[i].kind = MN_DEACTIVE;
 434       else
 435         pmenu->item[i].kind = MN_ACTION;
 436       menu_item_change_text(&pmenu->item[i],tmp);
 437       free(tmp);
 438     }
 439 }
 440
 441 void process_save_load_game_menu(int save)
 442 {
 443   int slot;
 444   switch (slot = (save ? save_game_menu->check() : load_game_menu->check()))
 445     {
 446     default:
 447       if(slot != -1)
 448         {
 449           if(save)
 450             {
 451               savegame(slot - 1);
 452             }
 453           else
 454             {
 455               if (game_started)
 456                 {
 457                   gameloop("default",slot - 1,ST_GL_LOAD_GAME);
 458                   show_menu = true;
 459                   Menu::set_current(main_menu);
 460                 }
 461               else
 462                 loadgame(slot - 1);
 463             }
 464           st_pause_ticks_stop();
 465         }
 466       break;
 467     }
 468 }
 469
 470 /* Handle changes made to global settings in the options menu. */
 471 void process_options_menu(void)
 472 {
 473   switch (options_menu->check())
 474     {
 475     case 2:
 476       if(use_fullscreen != options_menu->item[2].toggled)
 477         {
 478           use_fullscreen = !use_fullscreen;
 479           st_video_setup();
 480         }
 481       break;
 482     case 3:
 483       if(use_sound != options_menu->item[3].toggled)
 484         use_sound = !use_sound;
 485       break;
 486     case 4:
 487       if(use_music != options_menu->item[4].toggled)
 488         {
 489           if(use_music)
 490             {
 491               if(playing_music())
 492                 {
 493                   halt_music();
 494                 }
 495               use_music = false;
 496             }
 497           else
 498             {
 499               use_music = true;
 500               if (!playing_music())
 501                 {
 502                   play_current_music();
 503                 }
 504             }
 505         }
 506       break;
 507     case 5:
 508       if(show_fps != options_menu->item[5].toggled)
 509         show_fps = !show_fps;
 510       break;
 511     }
 512 }
 513
 514 void st_general_setup(void)
 515 {
 516   /* Seed random number generator: */
 517
 518   srand(SDL_GetTicks());
 519
 520   /* Set icon image: */
 521
 522   seticon();
 523
 524   /* Unicode needed for input handling: */
 525
 526   SDL_EnableUNICODE(1);
 527
 528   /* Load global images: */
 529
 530   text_load(&black_text, datadir + "/images/status/letters-black.png", TEXT_TEXT, 16,18);
 531   text_load(&gold_text,datadir + "/images/status/letters-gold.png", TEXT_TEXT, 16,18);
 532   text_load(&blue_text,datadir + "/images/status/letters-blue.png", TEXT_TEXT, 16,18);
 533   text_load(&red_text,datadir + "/images/status/letters-red.png", TEXT_TEXT, 16,18);
 534   text_load(&white_text,datadir + "/images/status/letters-white.png", TEXT_TEXT, 16,18);
 535   text_load(&white_small_text,datadir + "/images/status/letters-white-small.png", TEXT_TEXT, 8,9);
 536   text_load(&white_big_text,datadir + "/images/status/letters-white-big.png", TEXT_TEXT, 20,23);
 537   text_load(&yellow_nums,datadir + "/images/status/numbers.png", TEXT_NUM, 32,32);
 538
 539   /* Load GUI/menu images: */
 540   texture_load(&checkbox, datadir + "/images/status/checkbox.png", USE_ALPHA);
 541   texture_load(&checkbox_checked, datadir + "/images/status/checkbox-checked.png", USE_ALPHA);
 542   texture_load(&back, datadir + "/images/status/back.png", USE_ALPHA);
 543   texture_load(&arrow_left, datadir + "/images/icons/left.png", USE_ALPHA);
 544   texture_load(&arrow_right, datadir + "/images/icons/right.png", USE_ALPHA);
 545
 546   /* Load the mouse-cursor */
 547   mouse_cursor = new MouseCursor( datadir + "/images/status/mousecursor.png",1);
 548
 549 }
 550
 551 void st_general_free(void)
 552 {
 553
 554   /* Free global images: */
 555
 556   text_free(&black_text);
 557   text_free(&gold_text);
 558   text_free(&white_text);
 559   text_free(&blue_text);
 560   text_free(&red_text);
 561   text_free(&white_small_text);
 562   text_free(&white_big_text);
 563
 564   /* Free GUI/menu images: */
 565   texture_free(&checkbox);
 566   texture_free(&checkbox_checked);
 567   texture_free(&back);
 568   texture_free(&arrow_left);
 569   texture_free(&arrow_right);
 570
 571   /* Free mouse-cursor */
 572   delete mouse_cursor;
 573
 574   /* Free menus */
 575   delete main_menu;
 576   delete game_menu;
 577   delete options_menu;
 578   delete highscore_menu;
 579   delete save_game_menu;
 580   delete load_game_menu;
 581 }
 582
 583 void st_video_setup(void)
 584 {
 585
 586   if(screen != NULL)
 587     SDL_FreeSurface(screen);
 588
 589   /* Init SDL Video: */
 590
 591   if (SDL_Init(SDL_INIT_VIDEO) < 0)
 592     {
 593       fprintf(stderr,
 594               "\nError: I could not initialize video!\n"
 595               "The Simple DirectMedia error that occured was:\n"
 596               "%s\n\n", SDL_GetError());
 597       exit(1);
 598     }
 599
 600   /* Open display: */
 601
 602   if(use_gl)
 603     st_video_setup_gl();
 604   else
 605     st_video_setup_sdl();
 606
 607   texture_setup();
 608
 609   /* Set window manager stuff: */
 610
 611   SDL_WM_SetCaption("Super Tux", "Super Tux");
 612
 613 }
 614
 615 void st_video_setup_sdl(void)
 616 {
 617   SDL_FreeSurface(screen);
 618
 619   if (use_fullscreen)
 620     {
 621       screen = SDL_SetVideoMode(640, 480, 0, SDL_FULLSCREEN ) ; /* | SDL_HWSURFACE); */
 622       if (screen == NULL)
 623         {
 624           fprintf(stderr,
 625                   "\nWarning: I could not set up fullscreen video for "
 626                   "640x480 mode.\n"
 627                   "The Simple DirectMedia error that occured was:\n"
 628                   "%s\n\n", SDL_GetError());
 629           use_fullscreen = false;
 630         }
 631     }
 632   else
 633     {
 634       screen = SDL_SetVideoMode(640, 480, 0, SDL_HWSURFACE | SDL_DOUBLEBUF );
 635
 636       if (screen == NULL)
 637         {
 638           fprintf(stderr,
 639                   "\nError: I could not set up video for 640x480 mode.\n"
 640                   "The Simple DirectMedia error that occured was:\n"
 641                   "%s\n\n", SDL_GetError());
 642           exit(1);
 643         }
 644     }
 645 }
 646
 647 void st_video_setup_gl(void)
 648 {
 649 #ifndef NOOPENGL
 650
 651   SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 5);
 652   SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 5);
 653   SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 5);
 654   SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
 655   SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
 656
 657   if (use_fullscreen)
 658     {
 659       screen = SDL_SetVideoMode(640, 480, 0, SDL_FULLSCREEN | SDL_OPENGL) ; /* | SDL_HWSURFACE); */
 660       if (screen == NULL)
 661         {
 662           fprintf(stderr,
 663                   "\nWarning: I could not set up fullscreen video for "
 664                   "640x480 mode.\n"
 665                   "The Simple DirectMedia error that occured was:\n"
 666                   "%s\n\n", SDL_GetError());
 667           use_fullscreen = false;
 668         }
 669     }
 670   else
 671     {
 672       screen = SDL_SetVideoMode(640, 480, 0, SDL_OPENGL);
 673
 674       if (screen == NULL)
 675         {
 676           fprintf(stderr,
 677                   "\nError: I could not set up video for 640x480 mode.\n"
 678                   "The Simple DirectMedia error that occured was:\n"
 679                   "%s\n\n", SDL_GetError());
 680           exit(1);
 681         }
 682     }
 683
 684   /*
 685    * Set up OpenGL for 2D rendering.
 686    */
 687   glDisable(GL_DEPTH_TEST);
 688   glDisable(GL_CULL_FACE);
 689
 690   glViewport(0, 0, screen->w, screen->h);
 691   glMatrixMode(GL_PROJECTION);
 692   glLoadIdentity();
 693   glOrtho(0, screen->w, screen->h, 0, -1.0, 1.0);
 694
 695   glMatrixMode(GL_MODELVIEW);
 696   glLoadIdentity();
 697   glTranslatef(0.0f, 0.0f, 0.0f);
 698
 699 #endif
 700
 701 }
 702
 703 void st_joystick_setup(void)
 704 {
 705
 706   /* Init Joystick: */
 707
 708   use_joystick = true;
 709
 710   if (SDL_Init(SDL_INIT_JOYSTICK) < 0)
 711     {
 712       fprintf(stderr, "Warning: I could not initialize joystick!\n"
 713               "The Simple DirectMedia error that occured was:\n"
 714               "%s\n\n", SDL_GetError());
 715
 716       use_joystick = false;
 717     }
 718   else
 719     {
 720       /* Open joystick: */
 721       if (SDL_NumJoysticks() <= 0)
 722         {
 723           fprintf(stderr, "Warning: No joysticks are available.\n");
 724
 725           use_joystick = false;
 726         }
 727       else
 728         {
 729           js = SDL_JoystickOpen(joystick_num);
 730
 731           if (js == NULL)
 732             {
 733               fprintf(stderr, "Warning: Could not open joystick %d.\n"
 734                       "The Simple DirectMedia error that occured was:\n"
 735                       "%s\n\n", joystick_num, SDL_GetError());
 736
 737               use_joystick = false;
 738             }
 739           else
 740             {
 741               /* Check for proper joystick configuration: */
 742
 743               if (SDL_JoystickNumAxes(js) < 2)
 744                 {
 745                   fprintf(stderr,
 746                           "Warning: Joystick does not have enough axes!\n");
 747
 748                   use_joystick = false;
 749                 }
 750               else
 751                 {
 752                   if (SDL_JoystickNumButtons(js) < 2)
 753                     {
 754                       fprintf(stderr,
 755                               "Warning: "
 756                               "Joystick does not have enough buttons!\n");
 757
 758                       use_joystick = false;
 759                     }
 760                 }
 761             }
 762         }
 763     }
 764 }
 765
 766 void st_audio_setup(void)
 767 {
 768
 769   /* Init SDL Audio silently even if --disable-sound : */
 770
 771   if (audio_device)
 772     {
 773       if (SDL_Init(SDL_INIT_AUDIO) < 0)
 774         {
 775           /* only print out message if sound or music
 776              was not disabled at command-line
 777            */
 778           if (use_sound || use_music)
 779             {
 780               fprintf(stderr,
 781                       "\nWarning: I could not initialize audio!\n"
 782                       "The Simple DirectMedia error that occured was:\n"
 783                       "%s\n\n", SDL_GetError());
 784             }
 785           /* keep the programming logic the same :-)
 786              because in this case, use_sound & use_music' values are ignored
 787              when there's no available audio device
 788           */
 789           use_sound = false;
 790           use_music = false;
 791           audio_device = false;
 792         }
 793     }
 794
 795
 796   /* Open sound silently regarless the value of "use_sound": */
 797
 798   if (audio_device)
 799     {
 800       if (open_audio(44100, AUDIO_S16, 2, 2048) < 0)
 801         {
 802           /* only print out message if sound or music
 803              was not disabled at command-line
 804            */
 805           if (use_sound || use_music)
 806             {
 807               fprintf(stderr,
 808                       "\nWarning: I could not set up audio for 44100 Hz "
 809                       "16-bit stereo.\n"
 810                       "The Simple DirectMedia error that occured was:\n"
 811                       "%s\n\n", SDL_GetError());
 812             }
 813           use_sound = false;
 814           use_music = false;
 815           audio_device = false;
 816         }
 817     }
 818
 819 }
 820
 821
 822 /* --- SHUTDOWN --- */
 823
 824 void st_shutdown(void)
 825 {
 826   close_audio();
 827   SDL_Quit();
 828   saveconfig();
 829 }
 830
 831 /* --- ABORT! --- */
 832
 833 void st_abort(const std::string& reason, const std::string& details)
 834 {
 835   fprintf(stderr, "\nError: %s\n%s\n\n", reason.c_str(), details.c_str());
 836   st_shutdown();
 837   abort();
 838 }
 839
 840
 841 /* Set Icon (private) */
 842
 843 void seticon(void)
 844 {
 845   int masklen;
 846   Uint8 * mask;
 847   SDL_Surface * icon;
 848
 849
 850   /* Load icon into a surface: */
 851
 852   icon = IMG_Load((datadir + "/images/icon.png").c_str());
 853   if (icon == NULL)
 854     {
 855       fprintf(stderr,
 856               "\nError: I could not load the icon image: %s%s\n"
 857               "The Simple DirectMedia error that occured was:\n"
 858               "%s\n\n", datadir.c_str(), "/images/icon.png", SDL_GetError());
 859       exit(1);
 860     }
 861
 862
 863   /* Create mask: */
 864
 865   masklen = (((icon -> w) + 7) / 8) * (icon -> h);
 866   mask = (Uint8*) malloc(masklen * sizeof(Uint8));
 867   memset(mask, 0xFF, masklen);
 868
 869
 870   /* Set icon: */
 871
 872   SDL_WM_SetIcon(icon, mask);
 873
 874
 875   /* Free icon surface & mask: */
 876
 877   free(mask);
 878   SDL_FreeSurface(icon);
 879 }
 880
 881
 882 /* Parse command-line arguments: */
 883
 884 void parseargs(int argc, char * argv[])
 885 {
 886   int i;
 887
 888   loadconfig();
 889
 890   /* Parse arguments: */
 891
 892   for (i = 1; i < argc; i++)
 893     {
 894       if (strcmp(argv[i], "--fullscreen") == 0 ||
 895           strcmp(argv[i], "-f") == 0)
 896         {
 897           /* Use full screen: */
 898
 899           use_fullscreen = true;
 900         }
 901       else if (strcmp(argv[i], "--joystick") == 0 || strcmp(argv[i], "-j") == 0)
 902         {
 903           assert(i+1 < argc);
 904           joystick_num = atoi(argv[++i]);
 905         }
 906       else if (strcmp(argv[i], "--worldmap") == 0)
 907         {
 908           launch_worldmap_mode = true;
 909         }
 910       else if (strcmp(argv[i], "--datadir") == 0
 911                || strcmp(argv[i], "-d") == 0 )
 912         {
 913           assert(i+1 < argc);
 914           datadir = argv[++i];
 915         }
 916       else if (strcmp(argv[i], "--show-fps") == 0)
 917         {
 918           /* Use full screen: */
 919
 920           show_fps = true;
 921         }
 922       else if (strcmp(argv[i], "--opengl") == 0 ||
 923                strcmp(argv[i], "-gl") == 0)
 924         {
 925 #ifndef NOOPENGL
 926           /* Use OpengGL: */
 927
 928           use_gl = true;
 929 #endif
 930         }
 931       else if (strcmp(argv[i], "--sdl") == 0)
 932           {
 933             use_gl = false;
 934           }
 935       else if (strcmp(argv[i], "--usage") == 0)
 936         {
 937           /* Show usage: */
 938
 939           usage(argv[0], 0);
 940         }
 941       else if (strcmp(argv[i], "--version") == 0)
 942         {
 943           /* Show version: */
 944
 945           printf("Super Tux - version " VERSION "\n");
 946           exit(0);
 947         }
 948       else if (strcmp(argv[i], "--disable-sound") == 0)
 949         {
 950           /* Disable the compiled in sound feature */
 951           printf("Sounds disabled \n");
 952           use_sound = false;
 953         }
 954       else if (strcmp(argv[i], "--disable-music") == 0)
 955         {
 956           /* Disable the compiled in sound feature */
 957           printf("Music disabled \n");
 958           use_music = false;
 959         }
 960       else if (strcmp(argv[i], "--debug-mode") == 0)
 961         {
 962           /* Enable the debug-mode */
 963           debug_mode = true;
 964
 965         }
 966       else if (strcmp(argv[i], "--help") == 0)
 967         {     /* Show help: */
 968           puts("Super Tux " VERSION "\n"
 969                "  Please see the file \"README.txt\" for more details.\n");
 970           printf("Usage: %s [OPTIONS] FILENAME\n\n", argv[0]);
 971           puts("Display Options:\n"
 972                "  --fullscreen        Run in fullscreen mode.\n"
 973                "  --opengl            If opengl support was compiled in, this will enable\n"
 974                "                      the EXPERIMENTAL OpenGL mode.\n"
 975                "  --sdl               Use non-opengl renderer\n"
 976                "\n"
 977                "Sound Options:\n"
 978                "  --disable-sound     If sound support was compiled in,  this will\n"
 979                "                      disable sound for this session of the game.\n"
 980                "  --disable-music     Like above, but this will disable music.\n"
 981                "\n"
 982                "Misc Options:\n"
 983                "  -j, --joystick NUM  Use joystick NUM (default: 0)\n"
 984                "  --worldmap          Start in worldmap-mode (EXPERIMENTAL)\n"
 985                "  -d, --datadir DIR   Load Game data from DIR (default: automatic)\n"
 986                "  --debug-mode        Enables the debug-mode, which is useful for developers.\n"
 987                "  --help              Display a help message summarizing command-line\n"
 988                "                      options, license and game controls.\n"
 989                "  --usage             Display a brief message summarizing command-line options.\n"
 990                "  --version           Display the version of SuperTux you're running.\n\n"
 991                );
 992           exit(0);
 993         }
 994       else if (argv[i][0] != '-')
 995         {
 996           level_startup_file = argv[i];
 997         }
 998       else
 999         {
1000           /* Unknown - complain! */
1001
1002           usage(argv[0], 1);
1003         }
1004     }
1005 }
1006
1007
1008 /* Display usage: */
1009
1010 void usage(char * prog, int ret)
1011 {
1012   FILE * fi;
1013
1014
1015   /* Determine which stream to write to: */
1016
1017   if (ret == 0)
1018     fi = stdout;
1019   else
1020     fi = stderr;
1021
1022
1023   /* Display the usage message: */
1024
1025   fprintf(fi, "Usage: %s [--fullscreen] [--opengl] [--disable-sound] [--disable-music] [--debug-mode] | [--usage | --help | --version] [--worldmap] FILENAME\n",
1026           prog);
1027
1028
1029   /* Quit! */
1030
1031   exit(ret);
1032 }
1033