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/*
* Copyright 2010-2016 OpenXcom Developers.
*
* This file is part of OpenXcom.
*
* OpenXcom is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* OpenXcom is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with OpenXcom. If not, see <http://www.gnu.org/licenses/>.
*/
#include "Game.h"
#include "../resource.h"
#include <algorithm>
#include <cmath>
#include <sstream>
#include <SDL_mixer.h>
#include "State.h"
#include "Screen.h"
#include "Sound.h"
#include "Music.h"
#include "Language.h"
#include "Logger.h"
#include "../Interface/Cursor.h"
#include "../Interface/FpsCounter.h"
#include "../Mod/Mod.h"
#include "../Savegame/SavedGame.h"
#include "../Savegame/SavedBattleGame.h"
#include "Action.h"
#include "Exception.h"
#include "Options.h"
#include "CrossPlatform.h"
#include "FileMap.h"
#include "Unicode.h"
#include "../Menu/TestState.h"
namespace OpenXcom
{
const double Game::VOLUME_GRADIENT = 10.0;
/**
* Starts up SDL with all the subsystems and SDL_mixer for audio processing,
* creates the display screen and sets up the cursor.
* @param title Title of the game window.
*/
Game::Game(const std::string &title) : _screen(0), _cursor(0), _lang(0), _save(0), _mod(0), _quit(false), _init(false), _mouseActive(true)
{
Options::reload = false;
Options::mute = false;
// Initialize SDL
if (SDL_Init(SDL_INIT_VIDEO) < 0)
{
throw Exception(SDL_GetError());
}
Log(LOG_INFO) << "SDL initialized successfully.";
// Initialize SDL_mixer
if (SDL_InitSubSystem(SDL_INIT_AUDIO) < 0)
{
Log(LOG_ERROR) << SDL_GetError();
Log(LOG_WARNING) << "No sound device detected, audio disabled.";
Options::mute = true;
}
else
{
initAudio();
}
// trap the mouse inside the window
SDL_WM_GrabInput(Options::captureMouse);
// Set the window icon
CrossPlatform::setWindowIcon(IDI_ICON1, FileMap::getFilePath("openxcom.png"));
// Set the window caption
SDL_WM_SetCaption(title.c_str(), 0);
// Set up unicode
SDL_EnableUNICODE(1);
Unicode::getUtf8Locale();
// Create display
_screen = new Screen();
// Create cursor
_cursor = new Cursor(9, 13);
// Create invisible hardware cursor to workaround bug with absolute positioning pointing devices
SDL_ShowCursor(SDL_ENABLE);
Uint8 cursor = 0;
SDL_SetCursor(SDL_CreateCursor(&cursor, &cursor, 1,1,0,0));
// Create fps counter
_fpsCounter = new FpsCounter(15, 5, 0, 0);
// Create blank language
_lang = new Language();
}
/**
* Deletes the display screen, cursor, states and shuts down all the SDL subsystems.
*/
Game::~Game()
{
Sound::stop();
Music::stop();
for (std::list<State*>::iterator i = _states.begin(); i != _states.end(); ++i)
{
delete *i;
}
SDL_FreeCursor(SDL_GetCursor());
delete _cursor;
delete _lang;
delete _save;
delete _mod;
delete _screen;
delete _fpsCounter;
Mix_CloseAudio();
SDL_Quit();
}
/**
* The state machine takes care of passing all the events from SDL to the
* active state, running any code within and blitting all the states and
* cursor to the screen. This is run indefinitely until the game quits.
*/
void Game::run()
{
enum ApplicationState { RUNNING = 0, SLOWED = 1, PAUSED = 2 } runningState = RUNNING;
static const ApplicationState kbFocusRun[4] = { RUNNING, RUNNING, SLOWED, PAUSED };
static const ApplicationState stateRun[4] = { SLOWED, PAUSED, PAUSED, PAUSED };
// this will avoid processing SDL's resize event on startup, workaround for the heap allocation error it causes.
bool startupEvent = Options::allowResize;
while (!_quit)
{
Uint32 timeFrameStarted = SDL_GetTicks();
State *gameState = _states.back();
// Clean up states
while (!_deleted.empty())
{
delete _deleted.back();
_deleted.pop_back();
}
// Initialize active state
if (!_init)
{
_init = true;
gameState->init();
// Unpress buttons
gameState->resetAll();
// Refresh mouse position
SDL_Event ev;
int x, y;
SDL_GetMouseState(&x, &y);
ev.type = SDL_MOUSEMOTION;
ev.motion.x = x;
ev.motion.y = y;
Action action = Action(&ev, _screen->getXScale(), _screen->getYScale(), _screen->getCursorTopBlackBand(), _screen->getCursorLeftBlackBand());
gameState->handle(&action);
}
// Process events
while (SDL_PollEvent(&_event))
{
if (CrossPlatform::isQuitShortcut(_event))
_event.type = SDL_QUIT;
switch (_event.type)
{
case SDL_QUIT:
quit();
break;
case SDL_ACTIVEEVENT:
// An event other than SDL_APPMOUSEFOCUS change happened.
if (reinterpret_cast<SDL_ActiveEvent*>(&_event)->state & ~SDL_APPMOUSEFOCUS)
{
Uint8 appState = SDL_GetAppState();
// Game is minimized
if (!(appState & SDL_APPACTIVE))
{
runningState = stateRun[Options::pauseMode];
if (Options::backgroundMute)
{
setVolume(0, 0, 0);
}
}
// Game is not minimized but has no keyboard focus.
else if (!(appState & SDL_APPINPUTFOCUS))
{
runningState = kbFocusRun[Options::pauseMode];
if (Options::backgroundMute)
{
setVolume(0, 0, 0);
}
}
// Game has keyboard focus.
else
{
runningState = RUNNING;
if (Options::backgroundMute)
{
setVolume(Options::soundVolume, Options::musicVolume, Options::uiVolume);
}
}
}
break;
case SDL_VIDEORESIZE:
if (Options::allowResize)
{
if (!startupEvent)
{
Options::newDisplayWidth = Options::displayWidth = std::max(Screen::ORIGINAL_WIDTH, _event.resize.w);
Options::newDisplayHeight = Options::displayHeight = std::max(Screen::ORIGINAL_HEIGHT, _event.resize.h);
int dX = 0, dY = 0;
Screen::updateScale(Options::battlescapeScale, Options::baseXBattlescape, Options::baseYBattlescape, false);
Screen::updateScale(Options::geoscapeScale, Options::baseXGeoscape, Options::baseYGeoscape, false);
for (std::list<State*>::iterator i = _states.begin(); i != _states.end(); ++i)
{
(*i)->resize(dX, dY);
}
_screen->resetDisplay();
}
else
{
startupEvent = false;
}
}
break;
case SDL_MOUSEMOTION:
case SDL_MOUSEBUTTONDOWN:
case SDL_MOUSEBUTTONUP:
// Skip mouse events if they're disabled
if (!_mouseActive) continue;
// re-gain focus on mouse-over or keypress.
runningState = RUNNING;
// Go on, feed the event to others
default:
Action action = Action(&_event, _screen->getXScale(), _screen->getYScale(), _screen->getCursorTopBlackBand(), _screen->getCursorLeftBlackBand());
_screen->handle(&action);
_cursor->handle(&action);
_fpsCounter->handle(&action);
if (action.getDetails()->type == SDL_KEYDOWN)
{
// "ctrl-g" grab input
if (action.getDetails()->key.keysym.sym == SDLK_g && (SDL_GetModState() & KMOD_CTRL) != 0)
{
Options::captureMouse = (SDL_GrabMode)(!Options::captureMouse);
SDL_WM_GrabInput(Options::captureMouse);
}
else if (Options::debug)
{
if (action.getDetails()->key.keysym.sym == SDLK_t && (SDL_GetModState() & KMOD_CTRL) != 0)
{
setState(new TestState);
}
// "ctrl-u" debug UI
else if (action.getDetails()->key.keysym.sym == SDLK_u && (SDL_GetModState() & KMOD_CTRL) != 0)
{
Options::debugUi = !Options::debugUi;
gameState->redrawText();
}
}
}
gameState->handle(&action);
break;
}
}
// Process rendering
if (runningState != PAUSED)
{
// Process logic
gameState->think();
_fpsCounter->think();
if (_init)
{
_fpsCounter->addFrame();
_screen->clear();
std::list<State*>::iterator i = _states.end();
do
{
--i;
}
while (i != _states.begin() && !(*i)->isScreen());
for (; i != _states.end(); ++i)
{
(*i)->blit();
}
_fpsCounter->blit(_screen->getSurface());
_cursor->blit(_screen->getSurface());
_screen->flip();
}
}
// Calculate how long we are to sleep
Uint32 idleTime = 0;
if (Options::FPS > 0 && !(Options::useOpenGL && Options::vSyncForOpenGL))
{
// Uint32 milliseconds do wrap around in about 49.7 days
Uint32 timeFrameEnded = SDL_GetTicks();
Uint32 elapsedFrameTime = timeFrameEnded > timeFrameStarted ? timeFrameEnded - timeFrameStarted : 0;
Uint32 nominalFPS = SDL_GetAppState() & SDL_APPINPUTFOCUS ? Options::FPS : Options::FPSInactive;
Uint32 nominalFrameTime = Options::FPS > 0 ? 1000.0f / nominalFPS : 1;
idleTime = elapsedFrameTime > nominalFrameTime ? 0 : nominalFrameTime - elapsedFrameTime;
idleTime = idleTime > 100 ? 100 : idleTime;
}
// Save on CPU
switch (runningState)
{
case RUNNING:
SDL_Delay(idleTime); // Save CPU from going 100%
break;
case SLOWED:
case PAUSED:
SDL_Delay(100); // More slowing down.
break;
}
}
Options::save();
}
/**
* Stops the state machine and the game is shut down.
*/
void Game::quit()
{
// Always save ironman
if (_save != 0 && _save->isIronman() && !_save->getName().empty())
{
std::string filename = CrossPlatform::sanitizeFilename(Unicode::convUtf8ToPath(_save->getName())) + ".sav";
_save->save(filename);
}
_quit = true;
}
/**
* Changes the audio volume of the music and
* sound effect channels.
* @param sound Sound volume, from 0 to MIX_MAX_VOLUME.
* @param music Music volume, from 0 to MIX_MAX_VOLUME.
* @param ui UI volume, from 0 to MIX_MAX_VOLUME.
*/
void Game::setVolume(int sound, int music, int ui)
{
if (!Options::mute)
{
if (sound >= 0)
{
sound = volumeExponent(sound) * (double)SDL_MIX_MAXVOLUME;
Mix_Volume(-1, sound);
if (_save && _save->getSavedBattle())
{
Mix_Volume(3, sound * _save->getSavedBattle()->getAmbientVolume());
}
else
{
// channel 3: reserved for ambient sound effect.
Mix_Volume(3, sound / 2);
}
}
if (music >= 0)
{
music = volumeExponent(music) * (double)SDL_MIX_MAXVOLUME;
Mix_VolumeMusic(music);
}
if (ui >= 0)
{
ui = volumeExponent(ui) * (double)SDL_MIX_MAXVOLUME;
Mix_Volume(1, ui);
Mix_Volume(2, ui);
}
}
}
double Game::volumeExponent(int volume)
{
return (exp(log(Game::VOLUME_GRADIENT + 1.0) * volume / (double)SDL_MIX_MAXVOLUME) -1.0 ) / Game::VOLUME_GRADIENT;
}
/**
* Returns the display screen used by the game.
* @return Pointer to the screen.
*/
Screen *Game::getScreen() const
{
return _screen;
}
/**
* Returns the mouse cursor used by the game.
* @return Pointer to the cursor.
*/
Cursor *Game::getCursor() const
{
return _cursor;
}
/**
* Returns the FpsCounter used by the game.
* @return Pointer to the FpsCounter.
*/
FpsCounter *Game::getFpsCounter() const
{
return _fpsCounter;
}
/**
* Pops all the states currently in stack and pushes in the new state.
* A shortcut for cleaning up all the old states when they're not necessary
* like in one-way transitions.
* @param state Pointer to the new state.
*/
void Game::setState(State *state)
{
while (!_states.empty())
{
popState();
}
pushState(state);
_init = false;
}
/**
* Pushes a new state into the top of the stack and initializes it.
* The new state will be used once the next game cycle starts.
* @param state Pointer to the new state.
*/
void Game::pushState(State *state)
{
_states.push_back(state);
_init = false;
}
/**
* Pops the last state from the top of the stack. Since states
* can't actually be deleted mid-cycle, it's moved into a separate queue
* which is cleared at the start of every cycle, so the transition
* is seamless.
*/
void Game::popState()
{
_deleted.push_back(_states.back());
_states.pop_back();
_init = false;
}
/**
* Returns the language currently in use by the game.
* @return Pointer to the language.
*/
Language *Game::getLanguage() const
{
return _lang;
}
/**
* Returns the saved game currently in use by the game.
* @return Pointer to the saved game.
*/
SavedGame *Game::getSavedGame() const
{
return _save;
}
/**
* Sets a new saved game for the game to use.
* @param save Pointer to the saved game.
*/
void Game::setSavedGame(SavedGame *save)
{
delete _save;
_save = save;
}
/**
* Returns the mod currently in use by the game.
* @return Pointer to the mod.
*/
Mod *Game::getMod() const
{
return _mod;
}
/**
* Loads the mods specified in the game options.
*/
void Game::loadMods()
{
Mod::resetGlobalStatics();
delete _mod;
_mod = new Mod();
_mod->loadAll(FileMap::getRulesets());
}
/**
* Sets whether the mouse is activated.
* If it is, mouse events are processed, otherwise
* they are ignored and the cursor is hidden.
* @param active Is mouse activated?
*/
void Game::setMouseActive(bool active)
{
_mouseActive = active;
_cursor->setVisible(active);
}
/**
* Returns whether current state is *state
* @param state The state to test against the stack state
* @return Is state the current state?
*/
bool Game::isState(State *state) const
{
return !_states.empty() && _states.back() == state;
}
/**
* Checks if the game is currently quitting.
* @return whether the game is shutting down or not.
*/
bool Game::isQuitting() const
{
return _quit;
}
/**
* Loads the most appropriate languages
* given current system and game options.
*/
void Game::loadLanguages()
{
const std::string defaultLang = "en-US";
std::string currentLang = defaultLang;
delete _lang;
_lang = new Language();
std::ostringstream ss;
ss << "common/Language/" << defaultLang << ".yml";
std::string defaultPath = CrossPlatform::searchDataFile(ss.str());
std::string path = defaultPath;
// No language set, detect based on system
if (Options::language.empty())
{
std::string locale = CrossPlatform::getLocale();
std::string lang = locale.substr(0, locale.find_first_of('-'));
// Try to load full locale
Unicode::replace(path, defaultLang, locale);
if (CrossPlatform::fileExists(path))
{
currentLang = locale;
}
else
{
// Try to load language locale
Unicode::replace(path, locale, lang);
if (CrossPlatform::fileExists(path))
{
currentLang = lang;
}
// Give up, use default
else
{
currentLang = defaultLang;
}
}
}
else
{
// Use options language
Unicode::replace(path, defaultLang, Options::language);
if (CrossPlatform::fileExists(path))
{
currentLang = Options::language;
}
// Language not found, use default
else
{
currentLang = defaultLang;
}
}
Options::language = currentLang;
// Load default and current language
std::ostringstream ssDefault, ssCurrent;
ssDefault << "/Language/" << defaultLang << ".yml";
ssCurrent << "/Language/" << currentLang << ".yml";
_lang->loadFile(CrossPlatform::searchDataFile("common" + ssDefault.str()));
if (currentLang != defaultLang)
_lang->loadFile(CrossPlatform::searchDataFile("common" + ssCurrent.str()));
std::vector<const ModInfo*> activeMods = Options::getActiveMods();
for (std::vector<const ModInfo*>::const_iterator i = activeMods.begin(); i != activeMods.end(); ++i)
{
_lang->loadFile((*i)->getPath() + ssDefault.str());
if (currentLang != defaultLang)
_lang->loadFile((*i)->getPath() + ssCurrent.str());
}
_lang->loadRule(_mod->getExtraStrings(), defaultLang);
if (currentLang != defaultLang)
_lang->loadRule(_mod->getExtraStrings(), currentLang);
}
/**
* Initializes the audio subsystem.
*/
void Game::initAudio()
{
Uint16 format = MIX_DEFAULT_FORMAT;
if (Options::audioBitDepth == 8)
format = AUDIO_S8;
if (Options::audioSampleRate % 11025 != 0)
{
Log(LOG_WARNING) << "Custom sample rate " << Options::audioSampleRate << "Hz, audio that doesn't match will be distorted!";
Log(LOG_WARNING) << "SDL_mixer only supports multiples of 11025Hz.";
}
int minChunk = Options::audioSampleRate / 11025 * 512;
Options::audioChunkSize = std::max(minChunk, Options::audioChunkSize);
if (Mix_OpenAudio(Options::audioSampleRate, format, MIX_DEFAULT_CHANNELS, Options::audioChunkSize) != 0)
{
Log(LOG_ERROR) << Mix_GetError();
Log(LOG_WARNING) << "No sound device detected, audio disabled.";
Options::mute = true;
}
else
{
Mix_AllocateChannels(16);
// Set up UI channels
Mix_ReserveChannels(4);
Mix_GroupChannels(1, 2, 0);
Log(LOG_INFO) << "SDL_mixer initialized successfully.";
setVolume(Options::soundVolume, Options::musicVolume, Options::uiVolume);
}
}
}