src/gameloop.cpp

   1 //  $Id$
   2 //
   3 //  SuperTux
   4 //  Copyright (C) 2000 Bill Kendrick <bill@newbreedsoftware.com>
   5 //  Copyright (C) 2004 Tobias Glaesser <tobi.web@gmx.de>
   6 //  Copyright (C) 2004 Ingo Ruhnke <grumbel@gmx.de>
   7 //
   8 //  This program is free software; you can redistribute it and/or
   9 //  modify it under the terms of the GNU General Public License
  10 //  as published by the Free Software Foundation; either version 2
  11 //  of the License, or (at your option) any later version.
  12 //
  13 //  This program is distributed in the hope that it will be useful,
  14 //  but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 //  GNU General Public License for more details.
  17 //
  18 //  You should have received a copy of the GNU General Public License
  19 //  along with this program; if not, write to the Free Software
  20 //  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  21 #include <config.h>
  22
  23 #include <iostream>
  24 #include <sstream>
  25 #include <cassert>
  26 #include <cstdio>
  27 #include <cstdlib>
  28 #include <cmath>
  29 #include <cstring>
  30 #include <cerrno>
  31 #include <unistd.h>
  32 #include <ctime>
  33 #include <stdexcept>
  34
  35 #include <SDL.h>
  36
  37 #ifndef WIN32
  38 #include <sys/types.h>
  39 #include <ctype.h>
  40 #endif
  41
  42 #include "app/globals.h"
  43 #include "gameloop.h"
  44 #include "video/screen.h"
  45 #include "app/setup.h"
  46 #include "gui/menu.h"
  47 #include "sector.h"
  48 #include "level.h"
  49 #include "tile.h"
  50 #include "player_status.h"
  51 #include "object/particlesystem.h"
  52 #include "object/background.h"
  53 #include "object/tilemap.h"
  54 #include "object/camera.h"
  55 #include "object/player.h"
  56 #include "lisp/lisp.h"
  57 #include "lisp/parser.h"
  58 #include "resources.h"
  59 #include "app/gettext.h"
  60 #include "worldmap.h"
  61 #include "misc.h"
  62 #include "statistics.h"
  63 #include "timer.h"
  64 #include "object/fireworks.h"
  65 #include "textscroller.h"
  66
  67 GameSession* GameSession::current_ = 0;
  68
  69 bool compare_last(std::string& haystack, std::string needle)
  70 {
  71   int haystack_size = haystack.size();
  72   int needle_size = needle.size();
  73
  74   if(haystack_size < needle_size)
  75     return false;
  76
  77   if(haystack.compare(haystack_size-needle_size, needle_size, needle) == 0)
  78     return true;
  79   return false;
  80 }
  81
  82 GameSession::GameSession(const std::string& levelfile_, int mode,
  83     Statistics* statistics)
  84   : level(0), currentsector(0), st_gl_mode(mode),
  85     end_sequence(NO_ENDSEQUENCE), levelfile(levelfile_),
  86     best_level_statistics(statistics)
  87 {
  88   current_ = this;
  89
  90   game_pause = false;
  91   fps_fps = 0;
  92
  93   context = new DrawingContext();
  94
  95   restart_level();
  96 }
  97
  98 void
  99 GameSession::restart_level()
 100 {
 101   game_pause   = false;
 102   exit_status  = ES_NONE;
 103   end_sequence = NO_ENDSEQUENCE;
 104
 105   last_keys.clear();
 106
 107   delete level;
 108   currentsector = 0;
 109
 110   level = new Level;
 111   level->load(levelfile);
 112
 113   global_stats.reset();
 114   global_stats.set_total_points(COINS_COLLECTED_STAT, level->get_total_coins());
 115   global_stats.set_total_points(BADGUYS_KILLED_STAT, level->get_total_badguys());
 116   global_stats.set_total_points(TIME_NEEDED_STAT, level->timelimit);
 117
 118   if(reset_sector != "") {
 119     currentsector = level->get_sector(reset_sector);
 120     if(!currentsector) {
 121       std::stringstream msg;
 122       msg << "Couldn't find sector '" << reset_sector << "' for resetting tux.";
 123       throw std::runtime_error(msg.str());
 124     }
 125     currentsector->activate(reset_pos);
 126   } else {
 127     currentsector = level->get_sector("main");
 128     if(!currentsector)
 129       throw std::runtime_error("Couldn't find main sector");
 130     currentsector->activate("main");
 131   }
 132
 133   if(st_gl_mode == ST_GL_PLAY || st_gl_mode == ST_GL_LOAD_LEVEL_FILE)
 134     levelintro();
 135
 136   start_timers();
 137   currentsector->play_music(LEVEL_MUSIC);
 138 }
 139
 140 GameSession::~GameSession()
 141 {
 142   delete level;
 143   delete context;
 144 }
 145
 146 void
 147 GameSession::levelintro()
 148 {
 149   SoundManager::get()->halt_music();
 150
 151   char str[60];
 152
 153   DrawingContext context;
 154   for(Sector::GameObjects::iterator i = currentsector->gameobjects.begin();
 155       i != currentsector->gameobjects.end(); ++i) {
 156     Background* background = dynamic_cast<Background*> (*i);
 157     if(background) {
 158       background->draw(context);
 159     }
 160   }
 161
 162 //  context.draw_text(gold_text, level->get_name(), Vector(SCREEN_WIDTH/2, 160),
 163 //      CENTER_ALLIGN, LAYER_FOREGROUND1);
 164   context.draw_center_text(gold_text, level->get_name(), Vector(0, 160),
 165       LAYER_FOREGROUND1);
 166
 167   sprintf(str, "TUX x %d", player_status.lives);
 168   context.draw_text(white_text, str, Vector(SCREEN_WIDTH/2, 210),
 169       CENTER_ALLIGN, LAYER_FOREGROUND1);
 170
 171   if((level->get_author().size()) && (level->get_author() != "SuperTux Team"))
 172     //TODO make author check case/blank-insensitive
 173     context.draw_text(white_small_text,
 174       std::string(_("contributed by ")) + level->get_author(),
 175       Vector(SCREEN_WIDTH/2, 350), CENTER_ALLIGN, LAYER_FOREGROUND1);
 176
 177
 178   if(best_level_statistics != NULL)
 179     best_level_statistics->draw_message_info(context, _("Best Level Statistics"));
 180
 181   context.do_drawing();
 182
 183   SDL_Event event;
 184   wait_for_event(event,1000,3000,true);
 185 }
 186
 187 /* Reset Timers */
 188 void
 189 GameSession::start_timers()
 190 {
 191   time_left.start(level->timelimit);
 192   Ticks::pause_init();
 193 }
 194
 195 void
 196 GameSession::on_escape_press()
 197 {
 198   if(currentsector->player->is_dying() || end_sequence != NO_ENDSEQUENCE)
 199     return;   // don't let the player open the menu, when he is dying
 200
 201   if(game_pause)
 202     return;
 203
 204   if(st_gl_mode == ST_GL_TEST) {
 205     exit_status = ES_LEVEL_ABORT;
 206   } else if (!Menu::current()) {
 207     Menu::set_current(game_menu);
 208     Ticks::pause_start();
 209   }
 210 }
 211
 212 void
 213 GameSession::process_events()
 214 {
 215   if (end_sequence != NO_ENDSEQUENCE)
 216     {
 217       Player& tux = *currentsector->player;
 218
 219       tux.input.fire  = false;
 220       tux.input.left  = false;
 221       tux.input.right = true;
 222       tux.input.down  = false;
 223
 224       if (int(last_x_pos) == int(tux.get_pos().x))
 225         tux.input.up    = true;
 226       else
 227         tux.input.up    = false;
 228
 229       last_x_pos = tux.get_pos().x;
 230
 231       SDL_Event event;
 232       while (SDL_PollEvent(&event))
 233         {
 234           /* Check for menu-events, if the menu is shown */
 235           if (Menu::current())
 236             {
 237               Menu::current()->event(event);
 238               if(!Menu::current())
 239               Ticks::pause_stop();
 240             }
 241
 242           switch(event.type)
 243             {
 244             case SDL_QUIT:        /* Quit event - quit: */
 245               Termination::abort("Received window close", "");
 246               break;
 247
 248             case SDL_KEYDOWN:     /* A keypress! */
 249               {
 250                 SDLKey key = event.key.keysym.sym;
 251
 252                 switch(key)
 253                   {
 254                   case SDLK_ESCAPE:    /* Escape: Open/Close the menu: */
 255                     on_escape_press();
 256                     break;
 257                   default:
 258                     break;
 259                   }
 260               }
 261
 262             case SDL_JOYBUTTONDOWN:
 263               if (event.jbutton.button == joystick_keymap.start_button)
 264                 on_escape_press();
 265               break;
 266             }
 267         }
 268     }
 269   else // normal mode
 270     {
 271       if(!Menu::current() && !game_pause)
 272         Ticks::pause_stop();
 273
 274       SDL_Event event;
 275       while (SDL_PollEvent(&event))
 276         {
 277           /* Check for menu-events, if the menu is shown */
 278           if (Menu::current())
 279             {
 280               Menu::current()->event(event);
 281               if(!Menu::current())
 282                 Ticks::pause_stop();
 283             }
 284           else
 285             {
 286               Player& tux = *currentsector->player;
 287
 288               switch(event.type)
 289                 {
 290                 case SDL_QUIT:        /* Quit event - quit: */
 291                   Termination::abort("Received window close", "");
 292                   break;
 293
 294                 case SDL_KEYDOWN:     /* A keypress! */
 295                   {
 296                     SDLKey key = event.key.keysym.sym;
 297
 298                     if(tux.key_event(key, true))
 299                       break;
 300
 301                     switch(key)
 302                       {
 303                       case SDLK_ESCAPE:    /* Escape: Open/Close the menu: */
 304                         on_escape_press();
 305                         break;
 306                       default:
 307                         break;
 308                       }
 309                   }
 310                   break;
 311                 case SDL_KEYUP:      /* A keyrelease! */
 312                   {
 313                     SDLKey key = event.key.keysym.sym;
 314
 315                     if(tux.key_event(key, false))
 316                       break;
 317
 318                     switch(key)
 319                       {
 320                       case SDLK_a:
 321                         if(debug_mode)
 322                         {
 323                           char buf[160];
 324                           snprintf(buf, sizeof(buf), "P: %4.1f,%4.1f",
 325                               tux.get_pos().x, tux.get_pos().y);
 326                           context->draw_text(white_text, buf,
 327                               Vector(0, SCREEN_HEIGHT - white_text->get_height()),
 328                               LEFT_ALLIGN, LAYER_FOREGROUND1);
 329                           context->do_drawing();
 330                           SDL_Delay(1000);
 331                         }
 332                         break;
 333                       case SDLK_p:
 334                         if(!Menu::current())
 335                           {
 336                           // "lifeup" cheat activates pause cause of the 'p'
 337                           // so work around to ignore it
 338                             if(compare_last(last_keys, "lifeu"))
 339                               break;
 340
 341                             if(game_pause)
 342                               {
 343                                 game_pause = false;
 344                                 Ticks::pause_stop();
 345                               }
 346                             else
 347                               {
 348                                 game_pause = true;
 349                                 Ticks::pause_start();
 350                               }
 351                           }
 352                         break;
 353                       default:
 354                         break;
 355                       }
 356                   }
 357
 358                   /* Check if chacrater is ASCII */
 359                   char ch[2];
 360                   if((event.key.keysym.unicode & 0xFF80) == 0)
 361                   {
 362                       ch[0] = event.key.keysym.unicode & 0x7F;
 363                       ch[1] = '\0';
 364                   }
 365                         last_keys.append(ch);  // add to cheat keys
 366                         handle_cheats();
 367                   break;
 368
 369                 case SDL_JOYAXISMOTION:
 370                   if (event.jaxis.axis == joystick_keymap.x_axis)
 371                     {
 372                       if (event.jaxis.value < -joystick_keymap.dead_zone)
 373                         {
 374                           tux.input.left  = true;
 375                           tux.input.right = false;
 376                         }
 377                       else if (event.jaxis.value > joystick_keymap.dead_zone)
 378                         {
 379                           tux.input.left  = false;
 380                           tux.input.right = true;
 381                         }
 382                       else
 383                         {
 384                           tux.input.left  = false;
 385                           tux.input.right = false;
 386                         }
 387                     }
 388                   else if (event.jaxis.axis == joystick_keymap.y_axis)
 389                     {
 390                       if (event.jaxis.value > joystick_keymap.dead_zone)
 391                         {
 392                         tux.input.up = true;
 393                         tux.input.down = false;
 394                         }
 395                       else if (event.jaxis.value < -joystick_keymap.dead_zone)
 396                         {
 397                         tux.input.up = false;
 398                         tux.input.down = true;
 399                         }
 400                       else
 401                         {
 402                         tux.input.up = false;
 403                         tux.input.down = false;
 404                         }
 405                     }
 406                   break;
 407
 408                 case SDL_JOYHATMOTION:
 409                   if(event.jhat.value & SDL_HAT_UP) {
 410                     tux.input.up = true;
 411                     tux.input.down = false;
 412                   } else if(event.jhat.value & SDL_HAT_DOWN) {
 413                     tux.input.up = false;
 414                     tux.input.down = true;
 415                   } else if(event.jhat.value & SDL_HAT_LEFT) {
 416                     tux.input.left = true;
 417                     tux.input.right = false;
 418                   } else if(event.jhat.value & SDL_HAT_RIGHT) {
 419                     tux.input.left = false;
 420                     tux.input.right = true;
 421                   } else if(event.jhat.value == SDL_HAT_CENTERED) {
 422                     tux.input.left = false;
 423                     tux.input.right = false;
 424                     tux.input.up = false;
 425                     tux.input.down = false;
 426                   }
 427                   break;
 428
 429                 case SDL_JOYBUTTONDOWN:
 430                   // FIXME: I assume we have to set old_jump and stuff here?!?
 431                   if (event.jbutton.button == joystick_keymap.a_button)
 432                     tux.input.jump = true;
 433                   else if (event.jbutton.button == joystick_keymap.b_button)
 434                     tux.input.fire = true;
 435                   else if (event.jbutton.button == joystick_keymap.start_button)
 436                     on_escape_press();
 437                   break;
 438                 case SDL_JOYBUTTONUP:
 439                   if (event.jbutton.button == joystick_keymap.a_button)
 440                     tux.input.jump = false;
 441                   else if (event.jbutton.button == joystick_keymap.b_button)
 442                     tux.input.fire = false;
 443                   break;
 444
 445                 default:
 446                   break;
 447                 }  /* switch */
 448             }
 449         } /* while */
 450     }
 451 }
 452
 453 void
 454 GameSession::handle_cheats()
 455 {
 456   Player& tux = *currentsector->player;
 457
 458   // Cheating words (the goal of this is really for debugging,
 459   // but could be used for some cheating, nothing wrong with that)
 460   if(compare_last(last_keys, "grow")) {
 461     tux.set_bonus(GROWUP_BONUS, false);
 462     last_keys.clear();
 463   }
 464   if(compare_last(last_keys, "fire")) {
 465     tux.set_bonus(FIRE_BONUS, false);
 466     last_keys.clear();
 467   }
 468   if(compare_last(last_keys, "ice")) {
 469     tux.set_bonus(ICE_BONUS, false);
 470     last_keys.clear();
 471   }
 472   if(compare_last(last_keys, "lifeup")) {
 473     player_status.lives++;
 474     last_keys.clear();
 475   }
 476   if(compare_last(last_keys, "lifedown")) {
 477     player_status.lives--;
 478     last_keys.clear();
 479   }
 480   if(compare_last(last_keys, "grease")) {
 481     tux.physic.set_velocity_x(tux.physic.get_velocity_x()*3);
 482     last_keys.clear();
 483   }
 484   if(compare_last(last_keys, "invincible")) {
 485     // be invincle for the rest of the level
 486     tux.invincible_timer.start(10000);
 487     last_keys.clear();
 488   }
 489   if(compare_last(last_keys, "shrink")) {
 490     // remove powerups
 491     tux.kill(tux.SHRINK);
 492     last_keys.clear();
 493   }
 494   if(compare_last(last_keys, "kill")) {
 495     // kill Tux, but without losing a life
 496     player_status.lives++;
 497     tux.kill(tux.KILL);
 498     last_keys.clear();
 499   }
 500   if(compare_last(last_keys, "grid")) {
 501     // toggle debug grid
 502     debug_grid = !debug_grid;
 503     last_keys.clear();
 504   }
 505   if(compare_last(last_keys, "hover")) {
 506     // toggle hover ability on/off
 507     tux.enable_hover = !tux.enable_hover;
 508     last_keys.clear();
 509   }
 510   if(compare_last(last_keys, "gotoend")) {
 511     // goes to the end of the level
 512     tux.move(Vector(
 513           (currentsector->solids->get_width()*32) - (SCREEN_WIDTH*2), 0));
 514     currentsector->camera->reset(
 515         Vector(tux.get_pos().x, tux.get_pos().y));
 516     last_keys.clear();
 517   }
 518   if(compare_last(last_keys, "finish")) {
 519     // finish current sector
 520     exit_status = ES_LEVEL_FINISHED;
 521     // don't add points to stats though...
 522   }
 523   // temporary to help player's choosing a flapping
 524   if(compare_last(last_keys, "marek")) {
 525     tux.flapping_mode = Player::MAREK_FLAP;
 526     last_keys.clear();
 527   }
 528   if(compare_last(last_keys, "ricardo")) {
 529     tux.flapping_mode = Player::RICARDO_FLAP;
 530     last_keys.clear();
 531   }
 532   if(compare_last(last_keys, "ryan")) {
 533     tux.flapping_mode = Player::RYAN_FLAP;
 534     last_keys.clear();
 535   }
 536 }
 537
 538 void
 539 GameSession::check_end_conditions()
 540 {
 541   Player* tux = currentsector->player;
 542
 543   /* End of level? */
 544   if(end_sequence && endsequence_timer.check()) {
 545     exit_status = ES_LEVEL_FINISHED;
 546     return;
 547   } else if (!end_sequence && tux->is_dead()) {
 548     if (player_status.lives < 0) { // No more lives!?
 549       exit_status = ES_GAME_OVER;
 550     } else { // Still has lives, so reset Tux to the levelstart
 551       restart_level();
 552     }
 553
 554     return;
 555   }
 556 }
 557
 558 void
 559 GameSession::action(float elapsed_time)
 560 {
 561   // advance timers
 562   if(!currentsector->player->growing_timer.started()) {
 563     // Update Tux and the World
 564     currentsector->action(elapsed_time);
 565   }
 566
 567   // respawning in new sector?
 568   if(newsector != "" && newspawnpoint != "") {
 569     Sector* sector = level->get_sector(newsector);
 570     if(sector == 0) {
 571       std::cerr << "Sector '" << newsector << "' not found.\n";
 572     }
 573     sector->activate(newspawnpoint);
 574     sector->play_music(LEVEL_MUSIC);
 575     currentsector = sector;
 576     newsector = "";
 577     newspawnpoint = "";
 578   }
 579 }
 580
 581 void
 582 GameSession::draw()
 583 {
 584   currentsector->draw(*context);
 585   drawstatus(*context);
 586
 587   if(game_pause)
 588     draw_pause();
 589
 590   if(Menu::current()) {
 591     Menu::current()->draw(*context);
 592     mouse_cursor->draw(*context);
 593   }
 594
 595   context->do_drawing();
 596 }
 597
 598 void
 599 GameSession::draw_pause()
 600 {
 601   int x = SCREEN_HEIGHT / 20;
 602   for(int i = 0; i < x; ++i) {
 603     context->draw_filled_rect(
 604         Vector(i % 2 ? (pause_menu_frame * i)%SCREEN_WIDTH :
 605           -((pause_menu_frame * i)%SCREEN_WIDTH)
 606           ,(i*20+pause_menu_frame)%SCREEN_HEIGHT),
 607         Vector(SCREEN_WIDTH,10),
 608         Color(20,20,20, rand() % 20 + 1), LAYER_FOREGROUND1+1);
 609   }
 610   context->draw_filled_rect(
 611       Vector(0,0), Vector(SCREEN_WIDTH, SCREEN_HEIGHT),
 612       Color(rand() % 50, rand() % 50, rand() % 50, 128), LAYER_FOREGROUND1);
 613   context->draw_text(blue_text, _("PAUSE - Press 'P' To Play"),
 614       Vector(SCREEN_WIDTH/2, 230), CENTER_ALLIGN, LAYER_FOREGROUND1+2);
 615
 616   const char* str1 = _("Playing: ");
 617   const char* str2 = level->get_name().c_str();
 618
 619   context->draw_text(blue_text, str1,
 620       Vector((SCREEN_WIDTH - (blue_text->get_text_width(str1) + white_text->get_text_width(str2)))/2, 340),
 621       LEFT_ALLIGN, LAYER_FOREGROUND1+2);
 622   context->draw_text(white_text, str2,
 623       Vector(((SCREEN_WIDTH - (blue_text->get_text_width(str1) + white_text->get_text_width(str2)))/2)+blue_text->get_text_width(str1), 340),
 624       LEFT_ALLIGN, LAYER_FOREGROUND1+2);
 625 }
 626
 627 void
 628 GameSession::process_menu()
 629 {
 630   Menu* menu = Menu::current();
 631   if(menu)
 632     {
 633       menu->action();
 634
 635       if(menu == game_menu)
 636         {
 637           switch (game_menu->check())
 638             {
 639             case MNID_CONTINUE:
 640               Ticks::pause_stop();
 641               break;
 642             case MNID_ABORTLEVEL:
 643               Ticks::pause_stop();
 644               exit_status = ES_LEVEL_ABORT;
 645               break;
 646             }
 647         }
 648       else if(menu == options_menu)
 649         {
 650           process_options_menu();
 651         }
 652       else if(menu == load_game_menu )
 653         {
 654           process_load_game_menu();
 655         }
 656     }
 657 }
 658
 659
 660 GameSession::ExitStatus
 661 GameSession::run()
 662 {
 663   Menu::set_current(0);
 664   current_ = this;
 665
 666   int fps_cnt = 0;
 667   unsigned int fps_nextframe_ticks; // fps regulating code
 668
 669   // Eat unneeded events
 670   SDL_Event event;
 671   while(SDL_PollEvent(&event))
 672   {}
 673
 674   draw();
 675
 676   Uint32 lastticks = SDL_GetTicks();
 677   fps_ticks = SDL_GetTicks();
 678   fps_nextframe_ticks = SDL_GetTicks(); // fps regulating code
 679
 680   while (exit_status == ES_NONE) {
 681     Uint32 ticks = SDL_GetTicks();
 682     float elapsed_time = float(ticks - lastticks) / 1000.;
 683     if(!game_pause)
 684       global_time += elapsed_time;
 685     lastticks = ticks;
 686
 687     // 40fps is minimum
 688     if(elapsed_time > 0.025){
 689       elapsed_time = 0.025;
 690     }
 691
 692     // fps regualting code
 693     const int wantedFps= 60; // set to 60 by now
 694     while (fps_nextframe_ticks > SDL_GetTicks()){
 695             /* just wait */
 696             // If we really have to wait long, then do an imprecise SDL_Delay()
 697             if (fps_nextframe_ticks - SDL_GetTicks() > 15){
 698                 SDL_Delay(5);
 699             }
 700
 701     }
 702     fps_nextframe_ticks = SDL_GetTicks() + (1000 / wantedFps); // sets the ticks that must have elapsed
 703                                                // in order for the next frame to start.
 704
 705
 706     /* Handle events: */
 707     currentsector->player->input.old_fire = currentsector->player->input.fire;
 708     currentsector->player->input.old_up = currentsector->player->input.old_up;
 709
 710     process_events();
 711     process_menu();
 712
 713     // Update the world state and all objects in the world
 714     // Do that with a constante time-delta so that the game will run
 715     // determistic and not different on different machines
 716     if(!game_pause && !Menu::current())
 717     {
 718       // Update the world
 719       check_end_conditions();
 720       if (end_sequence == ENDSEQUENCE_RUNNING)
 721         action(elapsed_time/2);
 722       else if(end_sequence == NO_ENDSEQUENCE)
 723         action(elapsed_time);
 724     }
 725     else
 726     {
 727       ++pause_menu_frame;
 728       SDL_Delay(50);
 729     }
 730
 731     draw();
 732
 733     /* Time stops in pause mode */
 734     if(game_pause || Menu::current())
 735     {
 736       continue;
 737     }
 738
 739     //frame_rate.update();
 740
 741     /* Handle time: */
 742     if (time_left.check() && !end_sequence)
 743       currentsector->player->kill(Player::KILL);
 744
 745     /* Handle music: */
 746     if (currentsector->player->invincible_timer.started() && !end_sequence)
 747     {
 748       currentsector->play_music(HERRING_MUSIC);
 749     }
 750     /* are we low on time ? */
 751     else if (time_left.get_timeleft() < TIME_WARNING && !end_sequence)
 752     {
 753       currentsector->play_music(HURRYUP_MUSIC);
 754     }
 755     /* or just normal music? */
 756     else if(currentsector->get_music_type() != LEVEL_MUSIC && !end_sequence)
 757     {
 758       currentsector->play_music(LEVEL_MUSIC);
 759     }
 760
 761     /* Calculate frames per second */
 762     if(show_fps)
 763     {
 764       ++fps_cnt;
 765
 766       if(SDL_GetTicks() - fps_ticks >= 500)
 767       {
 768         fps_fps = (float) fps_cnt / .5;
 769         fps_cnt = 0;
 770         fps_ticks = SDL_GetTicks();
 771       }
 772     }
 773   }
 774
 775   return exit_status;
 776 }
 777
 778 void
 779 GameSession::respawn(const std::string& sector, const std::string& spawnpoint)
 780 {
 781   newsector = sector;
 782   newspawnpoint = spawnpoint;
 783 }
 784
 785 void
 786 GameSession::set_reset_point(const std::string& sector, const Vector& pos)
 787 {
 788   reset_sector = sector;
 789   reset_pos = pos;
 790 }
 791
 792 void
 793 GameSession::display_info_box(const std::string& text)
 794 {
 795   InfoBox* box = new InfoBox(text);
 796
 797   bool running = true;
 798   while(running)  {
 799     SDL_Event event;
 800     while (SDL_PollEvent(&event)) {
 801       switch(event.type) {
 802         case SDL_KEYDOWN:
 803           running = false;
 804           break;
 805       }
 806     }
 807
 808     box->draw(*context);
 809     draw();
 810   }
 811
 812   delete box;
 813 }
 814
 815 void
 816 GameSession::start_sequence(const std::string& sequencename)
 817 {
 818   if(sequencename == "endsequence" || sequencename == "fireworks") {
 819     if(end_sequence)
 820       return;
 821
 822     end_sequence = ENDSEQUENCE_RUNNING;
 823     endsequence_timer.start(7.0); // 7 seconds until we finish the map
 824     last_x_pos = -1;
 825     SoundManager::get()->play_music(level_end_song, 0);
 826     currentsector->player->invincible_timer.start(7.0);
 827
 828     // add left time to stats
 829     global_stats.set_points(TIME_NEEDED_STAT,
 830         int(time_left.get_period() - time_left.get_timeleft()));
 831
 832     if(sequencename == "fireworks") {
 833       currentsector->add_object(new Fireworks());
 834     }
 835   } else if(sequencename == "stoptux") {
 836     end_sequence =  ENDSEQUENCE_WAITING;
 837   } else {
 838     std::cout << "Unknown sequence '" << sequencename << "'.\n";
 839   }
 840 }
 841
 842 /* (Status): */
 843 void
 844 GameSession::drawstatus(DrawingContext& context)
 845 {
 846   char str[60];
 847
 848   snprintf(str, 60, " %d", global_stats.get_points(SCORE_STAT));
 849   context.draw_text(white_text, _("SCORE"), Vector(0, 0), LEFT_ALLIGN, LAYER_FOREGROUND1);
 850   context.draw_text(gold_text, str, Vector(96, 0), LEFT_ALLIGN, LAYER_FOREGROUND1);
 851
 852   if(st_gl_mode == ST_GL_TEST)
 853     {
 854       context.draw_text(white_text, _("Press ESC To Return"), Vector(0,20),
 855           LEFT_ALLIGN, LAYER_FOREGROUND1);
 856     }
 857
 858   if(time_left.get_timeleft() < 0) {
 859     context.draw_text(white_text, _("TIME's UP"), Vector(SCREEN_WIDTH/2, 0),
 860         CENTER_ALLIGN, LAYER_FOREGROUND1);
 861   } else if (time_left.get_timeleft() > TIME_WARNING
 862       || int(global_time * 2.5) % 2) {
 863     sprintf(str, " %d", int(time_left.get_timeleft()));
 864     context.draw_text(white_text, _("TIME"),
 865         Vector(SCREEN_WIDTH/2, 0), CENTER_ALLIGN, LAYER_FOREGROUND1);
 866     context.draw_text(gold_text, str,
 867         Vector(SCREEN_WIDTH/2 + 4*16, 0), CENTER_ALLIGN, LAYER_FOREGROUND1);
 868   }
 869
 870   sprintf(str, " %d", player_status.distros);
 871   context.draw_text(white_text, _("COINS"),
 872       Vector(SCREEN_WIDTH - white_text->get_text_width(_("COINS"))-white_text->get_text_width("   99"), 0),
 873         LEFT_ALLIGN, LAYER_FOREGROUND1);
 874   context.draw_text(gold_text, str,
 875       Vector(SCREEN_WIDTH - gold_text->get_text_width(" 99"), 0),LEFT_ALLIGN, LAYER_FOREGROUND1);
 876
 877   if (player_status.lives >= 5)
 878     {
 879       sprintf(str, "%dx", player_status.lives);
 880       float x = SCREEN_WIDTH - gold_text->get_text_width(str) - tux_life->w;
 881       context.draw_text(gold_text, str, Vector(x, 20), LEFT_ALLIGN, LAYER_FOREGROUND1);
 882       context.draw_surface(tux_life, Vector(SCREEN_WIDTH - 16, 20),
 883           LAYER_FOREGROUND1);
 884     }
 885   else
 886     {
 887       for(int i= 0; i < player_status.lives; ++i)
 888         context.draw_surface(tux_life,
 889             Vector(SCREEN_WIDTH - tux_life->w*4 +(tux_life->w*i), 20),
 890             LAYER_FOREGROUND1);
 891     }
 892
 893   context.draw_text(white_text, _("LIVES"),
 894       Vector(SCREEN_WIDTH - white_text->get_text_width(_("LIVES")) - white_text->get_text_width("   99"), 20),
 895       LEFT_ALLIGN, LAYER_FOREGROUND1);
 896
 897   if(show_fps)
 898     {
 899       sprintf(str, "%2.1f", fps_fps);
 900       context.draw_text(white_text, "FPS",
 901           Vector(SCREEN_WIDTH - white_text->get_text_width("FPS     "), 40),
 902           LEFT_ALLIGN, LAYER_FOREGROUND1);
 903       context.draw_text(gold_text, str,
 904           Vector(SCREEN_WIDTH-4*16, 40), LEFT_ALLIGN, LAYER_FOREGROUND1);
 905     }
 906 }
 907
 908 void
 909 GameSession::drawresultscreen()
 910 {
 911   char str[80];
 912
 913   DrawingContext context;
 914   for(Sector::GameObjects::iterator i = currentsector->gameobjects.begin();
 915       i != currentsector->gameobjects.end(); ++i) {
 916     Background* background = dynamic_cast<Background*> (*i);
 917     if(background) {
 918       background->draw(context);
 919     }
 920   }
 921
 922   context.draw_text(blue_text, _("Result:"), Vector(SCREEN_WIDTH/2, 200),
 923       CENTER_ALLIGN, LAYER_FOREGROUND1);
 924
 925   sprintf(str, _("SCORE: %d"), global_stats.get_points(SCORE_STAT));
 926   context.draw_text(gold_text, str, Vector(SCREEN_WIDTH/2, 224), CENTER_ALLIGN, LAYER_FOREGROUND1);
 927
 928   sprintf(str, _("COINS: %d"), player_status.distros);
 929   context.draw_text(gold_text, str, Vector(SCREEN_WIDTH/2, 256), CENTER_ALLIGN, LAYER_FOREGROUND1);
 930
 931   context.do_drawing();
 932
 933   SDL_Event event;
 934   wait_for_event(event,2000,5000,true);
 935 }
 936
 937 std::string slotinfo(int slot)
 938 {
 939   std::string tmp;
 940   std::string slotfile;
 941   std::string title;
 942   std::stringstream stream;
 943   stream << slot;
 944   slotfile = st_save_dir + "/slot" + stream.str() + ".stsg";
 945
 946   try {
 947     lisp::Parser parser;
 948     std::auto_ptr<lisp::Lisp> root (parser.parse(slotfile));
 949
 950     const lisp::Lisp* savegame = root->get_lisp("supertux-savegame");
 951     if(!savegame)
 952       throw std::runtime_error("file is not a supertux-savegame.");
 953
 954     savegame->get("title", title);
 955   } catch(std::exception& e) {
 956     return std::string(_("Slot")) + " " + stream.str() + " - " +
 957       std::string(_("Free"));
 958   }
 959
 960   return std::string("Slot ") + stream.str() + " - " + title;
 961 }
 962
 963 bool process_load_game_menu()
 964 {
 965   int slot = load_game_menu->check();
 966
 967   if(slot != -1 && load_game_menu->get_item_by_id(slot).kind == MN_ACTION)
 968     {
 969       std::stringstream stream;
 970       stream << slot;
 971       std::string slotfile = st_save_dir + "/slot" + stream.str() + ".stsg";
 972
 973       fadeout(256);
 974       DrawingContext context;
 975       context.draw_text(white_text, "Loading...",
 976                         Vector(SCREEN_WIDTH/2, SCREEN_HEIGHT/2), CENTER_ALLIGN, LAYER_FOREGROUND1);
 977       context.do_drawing();
 978
 979       WorldMapNS::WorldMap worldmap;
 980
 981       worldmap.set_map_filename("/levels/world1/worldmap.stwm");
 982       // Load the game or at least set the savegame_file variable
 983       worldmap.loadgame(slotfile);
 984
 985       worldmap.display();
 986
 987       Menu::set_current(main_menu);
 988
 989       Ticks::pause_stop();
 990       return true;
 991     }
 992   else
 993     {
 994       return false;
 995     }
 996 }