scummvm/engines/engine.cpp

/* Residual - A 3D game interpreter
 *
 * Residual is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the AUTHORS
 * file distributed with this source distribution.
 *
 * This program 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 2
 * of the License, or (at your option) any later version.

 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * $URL$
 * $Id$
 */

#if defined(WIN32)
#include <windows.h>
#include <direct.h>
// winnt.h defines ARRAYSIZE, but we want our own one...
#undef ARRAYSIZE
#endif

#include "engines/engine.h"
#include "common/config-manager.h"
#include "common/events.h"
#include "common/file.h"
#include "common/timer.h"
#include "common/savefile.h"
#include "common/system.h"
#include "sound/mixer.h"
#include "engines/metaengine.h"

#ifdef _WIN32_WCE
extern bool isSmartphone(void);
#endif

Engine::Engine(OSystem *syst)
	: _system(syst),
		_mixer(_system->getMixer()),
		_timer(_system->getTimerManager()),
		_eventMan(_system->getEventManager()),
		_saveFileMan(_system->getSavefileManager()),
		_targetName(ConfMan.getActiveDomainName()),
		_gameDataDir(ConfMan.get("path")),
		_pauseLevel(0) {

	// FIXME: Get rid of the following again. It is only here temporarily.
	// We really should never run with a non-working Mixer, so ought to handle
	// this at a much earlier stage. If we *really* want to support systems
	// without a working mixer, then we need more work. E.g. we could modify the
	// Mixer to immediately drop any streams passed to it. This way, at least
	// we don't crash because heaps of (sound) memory get allocated but never
	// freed. Of course, there still would be problems with many games...
	if (!_mixer->isReady())
		warning("Sound initialization failed. This may cause severe problems in some games.");
}

Engine::~Engine() {
	_mixer->stopAll();
}

bool Engine::shouldPerformAutoSave(int lastSaveTime) {
	const int diff = _system->getMillis() - lastSaveTime;
	const int autosavePeriod = ConfMan.getInt("autosave_period");
	return autosavePeriod != 0 && diff > autosavePeriod * 1000;
}

void Engine::pauseEngine(bool pause) {
	assert((pause && _pauseLevel >= 0) || (!pause && _pauseLevel));

	if (pause)
		_pauseLevel++;
	else
		_pauseLevel--;

	if (_pauseLevel == 1) {
		pauseEngineIntern(true);
	} else if (_pauseLevel == 0) {
		pauseEngineIntern(false);
	}
}

void Engine::pauseEngineIntern(bool pause) {
	// By default, just (un)pause all digital sounds
	_mixer->pauseAll(pause);
}

void Engine::syncSoundSettings() {

	// Sync the engine with the config manager
	int soundVolumeMusic = ConfMan.getInt("music_volume");
	int soundVolumeSFX = ConfMan.getInt("sfx_volume");
	int soundVolumeSpeech = ConfMan.getInt("speech_volume");

	_mixer->setVolumeForSoundType(Audio::Mixer::kMusicSoundType, soundVolumeMusic);
	_mixer->setVolumeForSoundType(Audio::Mixer::kSFXSoundType, soundVolumeSFX);
	_mixer->setVolumeForSoundType(Audio::Mixer::kSpeechSoundType, soundVolumeSpeech);
}

Common::Error Engine::loadGameState(int slot) {
	// Do nothing by default
	return Common::kNoError;
}

bool Engine::canLoadGameStateCurrently() {
	// Do not allow loading by default
	return false;
}

Common::Error Engine::saveGameState(int slot, const char *desc) {
	// Do nothing by default
	return Common::kNoError;
}

bool Engine::canSaveGameStateCurrently() {
	// Do not allow saving by default
	return false;
}

void Engine::quitGame() {
	Common::Event event;

	event.type = Common::EVENT_QUIT;
	g_system->getEventManager()->pushEvent(event);
}

/*
EnginePlugin *Engine::getMetaEnginePlugin() const {

	const EnginePlugin *plugin = 0;
	Common::String gameid = ConfMan.get("gameid");
	gameid.toLowercase();
	EngineMan.findGame(gameid, &plugin);
	return plugin;
}

*/