src/setup.c

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