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 <iostream>
  15 #include <stdio.h>
  16 #include <stdlib.h>
  17 #include <string.h>
  18 #include <errno.h>
  19 #include <unistd.h>
  20 #include <SDL.h>
  21 #include <SDL_image.h>
  22 #ifndef NOOPENGL
  23 #include <SDL_opengl.h>
  24 #endif
  25
  26 #include <sys/stat.h>
  27 #include <sys/types.h>
  28 #include <dirent.h>
  29 #ifndef WIN32
  30 #include <libgen.h>
  31 #endif
  32 #include <ctype.h>
  33
  34 #include "defines.h"
  35 #include "globals.h"
  36 #include "setup.h"
  37 #include "screen.h"
  38 #include "texture.h"
  39 #include "menu.h"
  40 #include "gameloop.h"
  41 #include "configfile.h"
  42 #include "scene.h"
  43
  44 #ifdef WIN32
  45 #define mkdir(dir, mode)    mkdir(dir)
  46 // on win32 we typically don't want LFS paths
  47 #undef DATA_PREFIX
  48 #define DATA_PREFIX "./data/"
  49 #endif
  50
  51 /* Local function prototypes: */
  52
  53 void seticon(void);
  54 void usage(char * prog, int ret);
  55
  56 /* Does the given file exist and is it accessible? */
  57 int faccessible(const char *filename)
  58 {
  59   struct stat filestat;
  60   if (stat(filename, &filestat) == -1)
  61     {
  62       return false;
  63     }
  64   else
  65     {
  66       if(S_ISREG(filestat.st_mode))
  67         return true;
  68       else
  69         return false;
  70     }
  71 }
  72
  73 /* Can we write to this location? */
  74 int fwriteable(const char *filename)
  75 {
  76   FILE* fi;
  77   fi = fopen(filename, "wa");
  78   if (fi == NULL)
  79     {
  80       return false;
  81     }
  82   return true;
  83 }
  84
  85 /* Makes sure a directory is created in either the SuperTux home directory or the SuperTux base directory.*/
  86 int fcreatedir(const char* relative_dir)
  87 {
  88   char path[1024];
  89   snprintf(path, 1024, "%s/%s/", st_dir, relative_dir);
  90   if(mkdir(path,0755) != 0)
  91     {
  92       snprintf(path, 1024, "%s/%s/", datadir.c_str(), relative_dir);
  93       if(mkdir(path,0755) != 0)
  94         {
  95           return false;
  96         }
  97       else
  98         {
  99           return true;
 100         }
 101     }
 102   else
 103     {
 104       return true;
 105     }
 106 }
 107
 108 FILE * opendata(const char * rel_filename, const char * mode)
 109 {
 110   char * filename = NULL;
 111   FILE * fi;
 112
 113   filename = (char *) malloc(sizeof(char) * (strlen(st_dir) +
 114                                              strlen(rel_filename) + 1));
 115
 116   strcpy(filename, st_dir);
 117   /* Open the high score file: */
 118
 119   strcat(filename, rel_filename);
 120
 121   /* Try opening the file: */
 122   fi = fopen(filename, mode);
 123
 124   if (fi == NULL)
 125     {
 126       fprintf(stderr, "Warning: Unable to open the file \"%s\" ", filename);
 127
 128       if (strcmp(mode, "r") == 0)
 129         fprintf(stderr, "for read!!!\n");
 130       else if (strcmp(mode, "w") == 0)
 131         fprintf(stderr, "for write!!!\n");
 132     }
 133   free( filename );
 134
 135   return(fi);
 136 }
 137
 138 /* Get all names of sub-directories in a certain directory. */
 139 /* Returns the number of sub-directories found. */
 140 /* Note: The user has to free the allocated space. */
 141 string_list_type dsubdirs(const char *rel_path,const  char* expected_file)
 142 {
 143   DIR *dirStructP;
 144   struct dirent *direntp;
 145   string_list_type sdirs;
 146   char filename[1024];
 147   char path[1024];
 148
 149   string_list_init(&sdirs);
 150   sprintf(path,"%s/%s",st_dir,rel_path);
 151   if((dirStructP = opendir(path)) != NULL)
 152     {
 153       while((direntp = readdir(dirStructP)) != NULL)
 154         {
 155           char absolute_filename[1024];
 156           struct stat buf;
 157
 158           sprintf(absolute_filename, "%s/%s", path, direntp->d_name);
 159
 160           if (stat(absolute_filename, &buf) == 0 && S_ISDIR(buf.st_mode))
 161             {
 162               if(expected_file != NULL)
 163                 {
 164                   sprintf(filename,"%s/%s/%s",path,direntp->d_name,expected_file);
 165                   if(!faccessible(filename))
 166                     continue;
 167                 }
 168
 169               string_list_add_item(&sdirs,direntp->d_name);
 170             }
 171         }
 172       closedir(dirStructP);
 173     }
 174
 175   sprintf(path,"%s/%s",datadir.c_str(),rel_path);
 176   if((dirStructP = opendir(path)) != NULL)
 177     {
 178       while((direntp = readdir(dirStructP)) != NULL)
 179         {
 180           char absolute_filename[1024];
 181           struct stat buf;
 182
 183           sprintf(absolute_filename, "%s/%s", path, direntp->d_name);
 184
 185           if (stat(absolute_filename, &buf) == 0 && S_ISDIR(buf.st_mode))
 186             {
 187               if(expected_file != NULL)
 188                 {
 189                   sprintf(filename,"%s/%s/%s",path,direntp->d_name,expected_file);
 190                   if(!faccessible(filename))
 191                     {
 192                       continue;
 193                     }
 194                   else
 195                     {
 196                       sprintf(filename,"%s/%s/%s/%s",st_dir,rel_path,direntp->d_name,expected_file);
 197                       if(faccessible(filename))
 198                         continue;
 199                     }
 200                 }
 201
 202               string_list_add_item(&sdirs,direntp->d_name);
 203             }
 204         }
 205       closedir(dirStructP);
 206     }
 207
 208   return sdirs;
 209 }
 210
 211 string_list_type dfiles(const char *rel_path, const  char* glob, const  char* exception_str)
 212 {
 213   DIR *dirStructP;
 214   struct dirent *direntp;
 215   string_list_type sdirs;
 216   char path[1024];
 217
 218   string_list_init(&sdirs);
 219   sprintf(path,"%s/%s",st_dir,rel_path);
 220   if((dirStructP = opendir(path)) != NULL)
 221     {
 222       while((direntp = readdir(dirStructP)) != NULL)
 223         {
 224           char absolute_filename[1024];
 225           struct stat buf;
 226
 227           sprintf(absolute_filename, "%s/%s", path, direntp->d_name);
 228
 229           if (stat(absolute_filename, &buf) == 0 && S_ISREG(buf.st_mode))
 230             {
 231               if(exception_str != NULL)
 232                 {
 233                   if(strstr(direntp->d_name,exception_str) != NULL)
 234                     continue;
 235                 }
 236               if(glob != NULL)
 237                 if(strstr(direntp->d_name,glob) == NULL)
 238                   continue;
 239
 240               string_list_add_item(&sdirs,direntp->d_name);
 241             }
 242         }
 243       closedir(dirStructP);
 244     }
 245
 246   sprintf(path,"%s/%s",datadir.c_str(),rel_path);
 247   if((dirStructP = opendir(path)) != NULL)
 248     {
 249       while((direntp = readdir(dirStructP)) != NULL)
 250         {
 251           char absolute_filename[1024];
 252           struct stat buf;
 253
 254           sprintf(absolute_filename, "%s/%s", path, direntp->d_name);
 255
 256           if (stat(absolute_filename, &buf) == 0 && S_ISREG(buf.st_mode))
 257             {
 258               if(exception_str != NULL)
 259                 {
 260                   if(strstr(direntp->d_name,exception_str) != NULL)
 261                     continue;
 262                 }
 263               if(glob != NULL)
 264                 if(strstr(direntp->d_name,glob) == NULL)
 265                   continue;
 266
 267               string_list_add_item(&sdirs,direntp->d_name);
 268             }
 269         }
 270       closedir(dirStructP);
 271     }
 272
 273   return sdirs;
 274 }
 275
 276 void free_strings(char **strings, int num)
 277 {
 278   int i;
 279   for(i=0; i < num; ++i)
 280     free(strings[i]);
 281 }
 282
 283 /* --- SETUP --- */
 284 /* Set SuperTux configuration and save directories */
 285 void st_directory_setup(void)
 286 {
 287   char *home;
 288   char str[1024];
 289   /* Get home directory (from $HOME variable)... if we can't determine it,
 290      use the current directory ("."): */
 291   if (getenv("HOME") != NULL)
 292     home = getenv("HOME");
 293   else
 294     home = ".";
 295
 296   st_dir = (char *) malloc(sizeof(char) * (strlen(home) +
 297                                            strlen("/.supertux") + 1));
 298   strcpy(st_dir, home);
 299   strcat(st_dir, "/.supertux");
 300
 301   /* Remove .supertux config-file from old SuperTux versions */
 302   if(faccessible(st_dir))
 303     {
 304       remove
 305         (st_dir);
 306     }
 307
 308   st_save_dir = (char *) malloc(sizeof(char) * (strlen(st_dir) + strlen("/save") + 1));
 309
 310   strcpy(st_save_dir,st_dir);
 311   strcat(st_save_dir,"/save");
 312
 313   /* Create them. In the case they exist they won't destroy anything. */
 314   mkdir(st_dir, 0755);
 315   mkdir(st_save_dir, 0755);
 316
 317   sprintf(str, "%s/levels", st_dir);
 318   mkdir(str, 0755);
 319
 320   // User has not that a datadir, so we try some magic
 321   if (datadir.empty())
 322     {
 323 #ifndef WIN32
 324       // Detect datadir
 325       char exe_file[PATH_MAX];
 326       if (readlink("/proc/self/exe", exe_file, PATH_MAX) < 0)
 327         {
 328           puts("Couldn't read /proc/self/exe, using default path: " DATA_PREFIX);
 329           datadir = DATA_PREFIX;
 330         }
 331       else
 332         {
 333           std::string exedir = std::string(dirname(exe_file)) + "/";
 334
 335           datadir = exedir + "../data/"; // SuperTux run from source dir
 336           if (access(datadir.c_str(), F_OK) != 0)
 337             {
 338               datadir = exedir + "../share/supertux/"; // SuperTux run from PATH
 339               if (access(datadir.c_str(), F_OK) != 0)
 340                 { // If all fails, fall back to compiled path
 341                   datadir = DATA_PREFIX;
 342                 }
 343             }
 344         }
 345 #else
 346   datadir = DATA_PREFIX;
 347 #endif
 348     }
 349   printf("Datadir: %s\n", datadir.c_str());
 350 }
 351
 352 /* Create and setup menus. */
 353 void st_menu(void)
 354 {
 355   main_menu      = new Menu();
 356   options_menu   = new Menu();
 357   options_controls_menu   = new Menu();
 358   load_game_menu = new Menu();
 359   save_game_menu = new Menu();
 360   game_menu      = new Menu();
 361   highscore_menu = new Menu();
 362   contrib_menu   = new Menu();
 363
 364   main_menu->set_pos(screen->w/2, 335);
 365   main_menu->additem(MN_GOTO, "Start Game",0,load_game_menu);
 366   main_menu->additem(MN_GOTO, "Contrib Levels",0,contrib_menu);
 367   main_menu->additem(MN_GOTO, "Options",0,options_menu);
 368   main_menu->additem(MN_ACTION,"Level editor",0,0);
 369   main_menu->additem(MN_ACTION,"Credits",0,0);
 370   main_menu->additem(MN_ACTION,"Quit",0,0);
 371
 372   contrib_menu->additem(MN_LABEL,"Contrib Levels",0,0);
 373   contrib_menu->additem(MN_HL,"",0,0);
 374   contrib_menu->additem(MN_ACTION, "Some Levelset", 0, 0);
 375   contrib_menu->additem(MN_ACTION, "Someother Levelset", 0, 0);
 376   contrib_menu->additem(MN_ACTION, "Yet another Levelset", 0, 0);
 377   contrib_menu->additem(MN_HL,"",0,0);
 378   contrib_menu->additem(MN_BACK,"Back",0,0);
 379
 380   options_menu->additem(MN_LABEL,"Options",0,0);
 381   options_menu->additem(MN_HL,"",0,0);
 382   options_menu->additem(MN_TOGGLE,"Fullscreen",use_fullscreen,0);
 383   if(audio_device)
 384     {
 385       options_menu->additem(MN_TOGGLE,"Sound     ",use_sound,0);
 386       options_menu->additem(MN_TOGGLE,"Music     ",use_music,0);
 387     }
 388   else
 389     {
 390       options_menu->additem(MN_DEACTIVE,"Sound     ",use_sound,0);
 391       options_menu->additem(MN_DEACTIVE,"Music     ",use_music,0);
 392     }
 393   options_menu->additem(MN_TOGGLE,"Show FPS  ",show_fps,0);
 394   options_menu->additem(MN_GOTO,"Controls  ",0,options_controls_menu);
 395   options_menu->additem(MN_HL,"",0,0);
 396   options_menu->additem(MN_BACK,"Back",0,0);
 397
 398   options_controls_menu->additem(MN_LABEL,"Controls",0,0);
 399   options_controls_menu->additem(MN_HL,"",0,0);
 400   options_controls_menu->additem(MN_CONTROLFIELD,"Move Right",tux.keymap.right,0);
 401   options_controls_menu->additem(MN_HL,"",0,0);
 402   options_controls_menu->additem(MN_BACK,"Back",0,0);
 403
 404   load_game_menu->additem(MN_LABEL,"Start Game",0,0);
 405   load_game_menu->additem(MN_HL,"",0,0);
 406   load_game_menu->additem(MN_DEACTIVE,"Slot 1",0,0);
 407   load_game_menu->additem(MN_DEACTIVE,"Slot 2",0,0);
 408   load_game_menu->additem(MN_DEACTIVE,"Slot 3",0,0);
 409   load_game_menu->additem(MN_DEACTIVE,"Slot 4",0,0);
 410   load_game_menu->additem(MN_DEACTIVE,"Slot 5",0,0);
 411   load_game_menu->additem(MN_HL,"",0,0);
 412   load_game_menu->additem(MN_BACK,"Back",0,0);
 413
 414   save_game_menu->additem(MN_LABEL,"Save Game",0,0);
 415   save_game_menu->additem(MN_HL,"",0,0);
 416   save_game_menu->additem(MN_DEACTIVE,"Slot 1",0,0);
 417   save_game_menu->additem(MN_DEACTIVE,"Slot 2",0,0);
 418   save_game_menu->additem(MN_DEACTIVE,"Slot 3",0,0);
 419   save_game_menu->additem(MN_DEACTIVE,"Slot 4",0,0);
 420   save_game_menu->additem(MN_DEACTIVE,"Slot 5",0,0);
 421   save_game_menu->additem(MN_HL,"",0,0);
 422   save_game_menu->additem(MN_BACK,"Back",0,0);
 423
 424   game_menu->additem(MN_LABEL,"InGame Menu",0,0);
 425   game_menu->additem(MN_HL,"",0,0);
 426   game_menu->additem(MN_ACTION,"Return To Game",0,0);
 427   game_menu->additem(MN_GOTO,"Save Game",0,save_game_menu);
 428   game_menu->additem(MN_GOTO,"Load Game",0,load_game_menu);
 429   game_menu->additem(MN_GOTO,"Options",0,options_menu);
 430   game_menu->additem(MN_HL,"",0,0);
 431   game_menu->additem(MN_ACTION,"Quit Game",0,0);
 432
 433   highscore_menu->additem(MN_TEXTFIELD,"Enter your name:",0,0);
 434 }
 435
 436 void update_load_save_game_menu(Menu* pmenu, int load)
 437 {
 438   for(int i = 2; i < 7; ++i)
 439     {
 440       // FIXME: Insert a real savegame struct/class here instead of
 441       // doing string vodoo
 442       std::string tmp = slotinfo(i-1);
 443
 444       if(load && tmp.length() == strlen("Slot X - Free"))
 445         pmenu->item[i].kind = MN_ACTION;
 446       else
 447         pmenu->item[i].kind = MN_ACTION;
 448       menu_item_change_text(&pmenu->item[i], tmp.c_str());
 449     }
 450 }
 451
 452 void process_save_game_menu()
 453 {
 454   int slot = save_game_menu->check();
 455   if (slot != -1)
 456     GameSession::current()->savegame(slot - 1);
 457 }
 458
 459 bool process_load_game_menu()
 460 {
 461   int slot = load_game_menu->check();
 462
 463   if(slot != -1)
 464     {
 465       // FIXME: Insert a real savegame struct/class here instead of
 466       // doing string vodoo
 467       std::string tmp = slotinfo(slot-1);
 468
 469       if (tmp.length() == strlen("Slot X - Free"))
 470         { // Slot is free, so start a new game
 471           GameSession session("default", 1, ST_GL_PLAY);
 472           session.run();
 473
 474           show_menu = true;
 475           Menu::set_current(main_menu);
 476         }
 477       else
 478         { // Slot contains a level, so load it
 479           if (game_started)
 480             {
 481               GameSession session("default",slot - 1,ST_GL_LOAD_GAME);
 482               session.run();
 483
 484               show_menu = true;
 485               Menu::set_current(main_menu);
 486             }
 487           else
 488             {
 489               //loadgame(slot - 1);
 490               puts("Warning: Loading games isn't supported at the moment");
 491             }
 492         }
 493       st_pause_ticks_stop();
 494       return true;
 495     }
 496   else
 497     {
 498       return false;
 499     }
 500 }
 501
 502 /* Handle changes made to global settings in the options menu. */
 503 void process_options_menu(void)
 504 {
 505   switch (options_menu->check())
 506     {
 507     case 2:
 508       if(use_fullscreen != options_menu->item[2].toggled)
 509         {
 510           use_fullscreen = !use_fullscreen;
 511           st_video_setup();
 512         }
 513       break;
 514     case 3:
 515       if(use_sound != options_menu->item[3].toggled)
 516         use_sound = !use_sound;
 517       break;
 518     case 4:
 519       if(use_music != options_menu->item[4].toggled)
 520         {
 521           if(use_music)
 522             {
 523               if(playing_music())
 524                 {
 525                   halt_music();
 526                 }
 527               use_music = false;
 528             }
 529           else
 530             {
 531               use_music = true;
 532               if (!playing_music())
 533                 {
 534                   play_current_music();
 535                 }
 536             }
 537         }
 538       break;
 539     case 5:
 540       if(show_fps != options_menu->item[5].toggled)
 541         show_fps = !show_fps;
 542       break;
 543     }
 544 }
 545
 546 void st_general_setup(void)
 547 {
 548   /* Seed random number generator: */
 549
 550   srand(SDL_GetTicks());
 551
 552   /* Set icon image: */
 553
 554   seticon();
 555
 556   /* Unicode needed for input handling: */
 557
 558   SDL_EnableUNICODE(1);
 559
 560   /* Load global images: */
 561
 562   text_load(&black_text, datadir + "/images/status/letters-black.png", TEXT_TEXT, 16,18);
 563   text_load(&gold_text,datadir + "/images/status/letters-gold.png", TEXT_TEXT, 16,18);
 564   text_load(&blue_text,datadir + "/images/status/letters-blue.png", TEXT_TEXT, 16,18);
 565   text_load(&red_text,datadir + "/images/status/letters-red.png", TEXT_TEXT, 16,18);
 566   text_load(&white_text,datadir + "/images/status/letters-white.png", TEXT_TEXT, 16,18);
 567   text_load(&white_small_text,datadir + "/images/status/letters-white-small.png", TEXT_TEXT, 8,9);
 568   text_load(&white_big_text,datadir + "/images/status/letters-white-big.png", TEXT_TEXT, 20,23);
 569   text_load(&yellow_nums,datadir + "/images/status/numbers.png", TEXT_NUM, 32,32);
 570
 571   /* Load GUI/menu images: */
 572   texture_load(&checkbox, datadir + "/images/status/checkbox.png", USE_ALPHA);
 573   texture_load(&checkbox_checked, datadir + "/images/status/checkbox-checked.png", USE_ALPHA);
 574   texture_load(&back, datadir + "/images/status/back.png", USE_ALPHA);
 575   texture_load(&arrow_left, datadir + "/images/icons/left.png", USE_ALPHA);
 576   texture_load(&arrow_right, datadir + "/images/icons/right.png", USE_ALPHA);
 577
 578   /* Load the mouse-cursor */
 579   mouse_cursor = new MouseCursor( datadir + "/images/status/mousecursor.png",1);
 580
 581 }
 582
 583 void st_general_free(void)
 584 {
 585
 586   /* Free global images: */
 587
 588   text_free(&black_text);
 589   text_free(&gold_text);
 590   text_free(&white_text);
 591   text_free(&blue_text);
 592   text_free(&red_text);
 593   text_free(&white_small_text);
 594   text_free(&white_big_text);
 595
 596   /* Free GUI/menu images: */
 597   texture_free(&checkbox);
 598   texture_free(&checkbox_checked);
 599   texture_free(&back);
 600   texture_free(&arrow_left);
 601   texture_free(&arrow_right);
 602
 603   /* Free mouse-cursor */
 604   delete mouse_cursor;
 605
 606   /* Free menus */
 607   delete main_menu;
 608   delete game_menu;
 609   delete options_menu;
 610   delete highscore_menu;
 611   delete save_game_menu;
 612   delete load_game_menu;
 613 }
 614
 615 void st_video_setup(void)
 616 {
 617
 618   if(screen != NULL)
 619     SDL_FreeSurface(screen);
 620
 621   /* Init SDL Video: */
 622
 623   if (SDL_Init(SDL_INIT_VIDEO) < 0)
 624     {
 625       fprintf(stderr,
 626               "\nError: I could not initialize video!\n"
 627               "The Simple DirectMedia error that occured was:\n"
 628               "%s\n\n", SDL_GetError());
 629       exit(1);
 630     }
 631
 632   /* Open display: */
 633
 634   if(use_gl)
 635     st_video_setup_gl();
 636   else
 637     st_video_setup_sdl();
 638
 639   texture_setup();
 640
 641   /* Set window manager stuff: */
 642
 643   SDL_WM_SetCaption("SuperTux " VERSION, "SuperTux");
 644
 645 }
 646
 647 void st_video_setup_sdl(void)
 648 {
 649   SDL_FreeSurface(screen);
 650
 651   if (use_fullscreen)
 652     {
 653       screen = SDL_SetVideoMode(640, 480, 0, SDL_FULLSCREEN ) ; /* | SDL_HWSURFACE); */
 654       if (screen == NULL)
 655         {
 656           fprintf(stderr,
 657                   "\nWarning: I could not set up fullscreen video for "
 658                   "640x480 mode.\n"
 659                   "The Simple DirectMedia error that occured was:\n"
 660                   "%s\n\n", SDL_GetError());
 661           use_fullscreen = false;
 662         }
 663     }
 664   else
 665     {
 666       screen = SDL_SetVideoMode(640, 480, 0, SDL_HWSURFACE | SDL_DOUBLEBUF );
 667
 668       if (screen == NULL)
 669         {
 670           fprintf(stderr,
 671                   "\nError: I could not set up video for 640x480 mode.\n"
 672                   "The Simple DirectMedia error that occured was:\n"
 673                   "%s\n\n", SDL_GetError());
 674           exit(1);
 675         }
 676     }
 677 }
 678
 679 void st_video_setup_gl(void)
 680 {
 681 #ifndef NOOPENGL
 682
 683   SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 5);
 684   SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 5);
 685   SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 5);
 686   SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
 687   SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
 688
 689   if (use_fullscreen)
 690     {
 691       screen = SDL_SetVideoMode(640, 480, 0, SDL_FULLSCREEN | SDL_OPENGL) ; /* | SDL_HWSURFACE); */
 692       if (screen == NULL)
 693         {
 694           fprintf(stderr,
 695                   "\nWarning: I could not set up fullscreen video for "
 696                   "640x480 mode.\n"
 697                   "The Simple DirectMedia error that occured was:\n"
 698                   "%s\n\n", SDL_GetError());
 699           use_fullscreen = false;
 700         }
 701     }
 702   else
 703     {
 704       screen = SDL_SetVideoMode(640, 480, 0, SDL_OPENGL);
 705
 706       if (screen == NULL)
 707         {
 708           fprintf(stderr,
 709                   "\nError: I could not set up video for 640x480 mode.\n"
 710                   "The Simple DirectMedia error that occured was:\n"
 711                   "%s\n\n", SDL_GetError());
 712           exit(1);
 713         }
 714     }
 715
 716   /*
 717    * Set up OpenGL for 2D rendering.
 718    */
 719   glDisable(GL_DEPTH_TEST);
 720   glDisable(GL_CULL_FACE);
 721
 722   glViewport(0, 0, screen->w, screen->h);
 723   glMatrixMode(GL_PROJECTION);
 724   glLoadIdentity();
 725   glOrtho(0, screen->w, screen->h, 0, -1.0, 1.0);
 726
 727   glMatrixMode(GL_MODELVIEW);
 728   glLoadIdentity();
 729   glTranslatef(0.0f, 0.0f, 0.0f);
 730
 731 #endif
 732
 733 }
 734
 735 void st_joystick_setup(void)
 736 {
 737
 738   /* Init Joystick: */
 739
 740   use_joystick = true;
 741
 742   if (SDL_Init(SDL_INIT_JOYSTICK) < 0)
 743     {
 744       fprintf(stderr, "Warning: I could not initialize joystick!\n"
 745               "The Simple DirectMedia error that occured was:\n"
 746               "%s\n\n", SDL_GetError());
 747
 748       use_joystick = false;
 749     }
 750   else
 751     {
 752       /* Open joystick: */
 753       if (SDL_NumJoysticks() <= 0)
 754         {
 755           fprintf(stderr, "Warning: No joysticks are available.\n");
 756
 757           use_joystick = false;
 758         }
 759       else
 760         {
 761           js = SDL_JoystickOpen(joystick_num);
 762
 763           if (js == NULL)
 764             {
 765               fprintf(stderr, "Warning: Could not open joystick %d.\n"
 766                       "The Simple DirectMedia error that occured was:\n"
 767                       "%s\n\n", joystick_num, SDL_GetError());
 768
 769               use_joystick = false;
 770             }
 771           else
 772             {
 773               /* Check for proper joystick configuration: */
 774
 775               if (SDL_JoystickNumAxes(js) < 2)
 776                 {
 777                   fprintf(stderr,
 778                           "Warning: Joystick does not have enough axes!\n");
 779
 780                   use_joystick = false;
 781                 }
 782               else
 783                 {
 784                   if (SDL_JoystickNumButtons(js) < 2)
 785                     {
 786                       fprintf(stderr,
 787                               "Warning: "
 788                               "Joystick does not have enough buttons!\n");
 789
 790                       use_joystick = false;
 791                     }
 792                 }
 793             }
 794         }
 795     }
 796 }
 797
 798 void st_audio_setup(void)
 799 {
 800
 801   /* Init SDL Audio silently even if --disable-sound : */
 802
 803   if (audio_device)
 804     {
 805       if (SDL_Init(SDL_INIT_AUDIO) < 0)
 806         {
 807           /* only print out message if sound or music
 808              was not disabled at command-line
 809            */
 810           if (use_sound || use_music)
 811             {
 812               fprintf(stderr,
 813                       "\nWarning: I could not initialize audio!\n"
 814                       "The Simple DirectMedia error that occured was:\n"
 815                       "%s\n\n", SDL_GetError());
 816             }
 817           /* keep the programming logic the same :-)
 818              because in this case, use_sound & use_music' values are ignored
 819              when there's no available audio device
 820           */
 821           use_sound = false;
 822           use_music = false;
 823           audio_device = false;
 824         }
 825     }
 826
 827
 828   /* Open sound silently regarless the value of "use_sound": */
 829
 830   if (audio_device)
 831     {
 832       if (open_audio(44100, AUDIO_S16, 2, 2048) < 0)
 833         {
 834           /* only print out message if sound or music
 835              was not disabled at command-line
 836            */
 837           if (use_sound || use_music)
 838             {
 839               fprintf(stderr,
 840                       "\nWarning: I could not set up audio for 44100 Hz "
 841                       "16-bit stereo.\n"
 842                       "The Simple DirectMedia error that occured was:\n"
 843                       "%s\n\n", SDL_GetError());
 844             }
 845           use_sound = false;
 846           use_music = false;
 847           audio_device = false;
 848         }
 849     }
 850
 851 }
 852
 853
 854 /* --- SHUTDOWN --- */
 855
 856 void st_shutdown(void)
 857 {
 858   close_audio();
 859   SDL_Quit();
 860   saveconfig();
 861 }
 862
 863 /* --- ABORT! --- */
 864
 865 void st_abort(const std::string& reason, const std::string& details)
 866 {
 867   fprintf(stderr, "\nError: %s\n%s\n\n", reason.c_str(), details.c_str());
 868   st_shutdown();
 869   abort();
 870 }
 871
 872
 873 /* Set Icon (private) */
 874
 875 void seticon(void)
 876 {
 877   int masklen;
 878   Uint8 * mask;
 879   SDL_Surface * icon;
 880
 881
 882   /* Load icon into a surface: */
 883
 884   icon = IMG_Load((datadir + "/images/icon.png").c_str());
 885   if (icon == NULL)
 886     {
 887       fprintf(stderr,
 888               "\nError: I could not load the icon image: %s%s\n"
 889               "The Simple DirectMedia error that occured was:\n"
 890               "%s\n\n", datadir.c_str(), "/images/icon.png", SDL_GetError());
 891       exit(1);
 892     }
 893
 894
 895   /* Create mask: */
 896
 897   masklen = (((icon -> w) + 7) / 8) * (icon -> h);
 898   mask = (Uint8*) malloc(masklen * sizeof(Uint8));
 899   memset(mask, 0xFF, masklen);
 900
 901
 902   /* Set icon: */
 903
 904   SDL_WM_SetIcon(icon, mask);
 905
 906
 907   /* Free icon surface & mask: */
 908
 909   free(mask);
 910   SDL_FreeSurface(icon);
 911 }
 912
 913
 914 /* Parse command-line arguments: */
 915
 916 void parseargs(int argc, char * argv[])
 917 {
 918   int i;
 919
 920   loadconfig();
 921
 922   /* Parse arguments: */
 923
 924   for (i = 1; i < argc; i++)
 925     {
 926       if (strcmp(argv[i], "--fullscreen") == 0 ||
 927           strcmp(argv[i], "-f") == 0)
 928         {
 929           /* Use full screen: */
 930
 931           use_fullscreen = true;
 932         }
 933       else if (strcmp(argv[i], "--joystick") == 0 || strcmp(argv[i], "-j") == 0)
 934         {
 935           assert(i+1 < argc);
 936           joystick_num = atoi(argv[++i]);
 937         }
 938       else if (strcmp(argv[i], "--worldmap") == 0)
 939         {
 940           launch_worldmap_mode = true;
 941         }
 942       else if (strcmp(argv[i], "--datadir") == 0
 943                || strcmp(argv[i], "-d") == 0 )
 944         {
 945           assert(i+1 < argc);
 946           datadir = argv[++i];
 947         }
 948       else if (strcmp(argv[i], "--show-fps") == 0)
 949         {
 950           /* Use full screen: */
 951
 952           show_fps = true;
 953         }
 954       else if (strcmp(argv[i], "--opengl") == 0 ||
 955                strcmp(argv[i], "-gl") == 0)
 956         {
 957 #ifndef NOOPENGL
 958           /* Use OpengGL: */
 959
 960           use_gl = true;
 961 #endif
 962         }
 963       else if (strcmp(argv[i], "--sdl") == 0)
 964           {
 965             use_gl = false;
 966           }
 967       else if (strcmp(argv[i], "--usage") == 0)
 968         {
 969           /* Show usage: */
 970
 971           usage(argv[0], 0);
 972         }
 973       else if (strcmp(argv[i], "--version") == 0)
 974         {
 975           /* Show version: */
 976           printf("SuperTux " VERSION "\n");
 977           exit(0);
 978         }
 979       else if (strcmp(argv[i], "--disable-sound") == 0)
 980         {
 981           /* Disable the compiled in sound feature */
 982           printf("Sounds disabled \n");
 983           use_sound = false;
 984         }
 985       else if (strcmp(argv[i], "--disable-music") == 0)
 986         {
 987           /* Disable the compiled in sound feature */
 988           printf("Music disabled \n");
 989           use_music = false;
 990         }
 991       else if (strcmp(argv[i], "--debug-mode") == 0)
 992         {
 993           /* Enable the debug-mode */
 994           debug_mode = true;
 995
 996         }
 997       else if (strcmp(argv[i], "--help") == 0)
 998         {     /* Show help: */
 999           puts("Super Tux " VERSION "\n"
1000                "  Please see the file \"README.txt\" for more details.\n");
1001           printf("Usage: %s [OPTIONS] FILENAME\n\n", argv[0]);
1002           puts("Display Options:\n"
1003                "  --fullscreen        Run in fullscreen mode.\n"
1004                "  --opengl            If opengl support was compiled in, this will enable\n"
1005                "                      the EXPERIMENTAL OpenGL mode.\n"
1006                "  --sdl               Use non-opengl renderer\n"
1007                "\n"
1008                "Sound Options:\n"
1009                "  --disable-sound     If sound support was compiled in,  this will\n"
1010                "                      disable sound for this session of the game.\n"
1011                "  --disable-music     Like above, but this will disable music.\n"
1012                "\n"
1013                "Misc Options:\n"
1014                "  -j, --joystick NUM  Use joystick NUM (default: 0)\n"
1015                "  --worldmap          Start in worldmap-mode (EXPERIMENTAL)\n"
1016                "  -d, --datadir DIR   Load Game data from DIR (default: automatic)\n"
1017                "  --debug-mode        Enables the debug-mode, which is useful for developers.\n"
1018                "  --help              Display a help message summarizing command-line\n"
1019                "                      options, license and game controls.\n"
1020                "  --usage             Display a brief message summarizing command-line options.\n"
1021                "  --version           Display the version of SuperTux you're running.\n\n"
1022                );
1023           exit(0);
1024         }
1025       else if (argv[i][0] != '-')
1026         {
1027           level_startup_file = argv[i];
1028         }
1029       else
1030         {
1031           /* Unknown - complain! */
1032
1033           usage(argv[0], 1);
1034         }
1035     }
1036 }
1037
1038
1039 /* Display usage: */
1040
1041 void usage(char * prog, int ret)
1042 {
1043   FILE * fi;
1044
1045
1046   /* Determine which stream to write to: */
1047
1048   if (ret == 0)
1049     fi = stdout;
1050   else
1051     fi = stderr;
1052
1053
1054   /* Display the usage message: */
1055
1056   fprintf(fi, "Usage: %s [--fullscreen] [--opengl] [--disable-sound] [--disable-music] [--debug-mode] | [--usage | --help | --version] [--worldmap] FILENAME\n",
1057           prog);
1058
1059
1060   /* Quit! */
1061
1062   exit(ret);
1063 }
1064