C++ SegManager::getObject方法代码示例

// SCI1 Early:
// KQ5 - no fastcast, LSL1 (demo) - no fastcast, Mixed Up Fairy Tales - *has fastcast*, XMas Card 1990 - no fastcast,
// SQ4Floppy - no fastcast, Mixed Up Mother Goose - no fastcast
//
// SCI1 Middle:
// LSL5 demo - no fastfast, Conquest of the Longbow demo - no fastcast, LSL1 - no fastcast,
// Astro Chicken II - no fastcast
//
// SCI1 Late:
// Castle of Dr. Brain demo - has fastcast, Castle of Dr. Brain - has fastcast,
// Conquests of the Longbow - has fastcast, Space Quest 1 EGA - has fastcast,
// King's Quest 5 multilingual - *NO* fastcast, Police Quest 3 demo - *NO* fastcast,
// LSL5 multilingual - has fastcast, Police Quest 3 - has fastcast,
// EcoQuest 1 - has fastcast, Mixed Up Fairy Tales demo - has fastcast,
// Space Quest 4 multilingual - *NO* fastcast
//
// SCI1.1
// Quest for Glory 3 demo - has fastcast, Police Quest 1 - hast fastcast, Quest for Glory 1 - has fastcast
// Laura Bow 2 Floppy - has fastcast, Mixed Up Mother Goose - has fastcast, Quest for Glory 3 - has fastcast
// Island of Dr. Brain - has fastcast, King's Quest 6 - has fastcast, Space Quest 5 - has fastcast
// Hoyle 4 - has fastcast, Laura Bow 2 CD - has fastcast, Freddy Pharkas CD - has fastcast
bool GfxAnimate::detectFastCast() {
	SegManager *segMan = _s->_segMan;
	const reg_t gameVMObject = g_sci->getGameObject();
	reg_t gameSuperVMObject = segMan->getObject(gameVMObject)->getSuperClassSelector();
	uint32 magicDWord = 0; // platform-specific BE/LE for performance
	int    magicDWordOffset = 0;

	if (gameSuperVMObject.isNull()) {
		gameSuperVMObject = gameVMObject; // Just in case. According to sci.cpp this may happen in KQ5CD, when loading saved games before r54510
	}

	Script *objectScript = segMan->getScript(gameSuperVMObject.getSegment());
	byte *scriptData = const_cast<byte *>(objectScript->getBuf(0));
	uint32 scriptSize = objectScript->getBufSize();

	_scriptPatcher->calculateMagicDWordAndVerify("fast cast detection", fastCastSignature, true, magicDWord, magicDWordOffset);

	// Signature is found for multilingual King's Quest 5 too, but it looks as if the fast cast global is never set
	// within that game. Which means even though we detect it as having the capability, it's never actually used.
	// The original multilingual KQ5 interpreter did have this feature disabled.
	// Sierra probably used latest system scripts and that's why we detect it.
	if (_scriptPatcher->findSignature(magicDWord, magicDWordOffset, fastCastSignature, "fast cast detection", scriptData, scriptSize) >= 0) {
		// Signature found, game seems to use fast cast for kAnimate
		return true;
	}
	return false;
}

void SciEngine::patchGameSaveRestore() {
	SegManager *segMan = _gamestate->_segMan;
	const Object *gameObject = segMan->getObject(_gameObjectAddress);
	const Object *gameSuperObject = segMan->getObject(gameObject->getSuperClassSelector());
	if (!gameSuperObject)
		gameSuperObject = gameObject;	// happens in KQ5CD, when loading saved games before r54510
	byte kernelIdRestore = 0;
	byte kernelIdSave = 0;

	switch (_gameId) {
	case GID_HOYLE1: // gets confused, although the game doesn't support saving/restoring at all
	case GID_HOYLE2: // gets confused, see hoyle1
	case GID_JONES: // gets confused, when we patch us in, the game is only able to save to 1 slot, so hooking is not required
	case GID_KQ7: // has custom save/load code
	case GID_MOTHERGOOSE: // mother goose EGA saves/restores directly and has no save/restore dialogs
	case GID_MOTHERGOOSE256: // mother goose saves/restores directly and has no save/restore dialogs
	case GID_MOTHERGOOSEHIRES: // has custom save/load code
	case GID_PHANTASMAGORIA: // has custom save/load code
	case GID_PQSWAT: // has custom save/load code
	case GID_SHIVERS: // has custom save/load code
		return;
	default:
		break;
	}

	if (ConfMan.getBool("originalsaveload"))
		return;

	uint16 kernelNamesSize = _kernel->getKernelNamesSize();
	for (uint16 kernelNr = 0; kernelNr < kernelNamesSize; kernelNr++) {
		Common::String kernelName = _kernel->getKernelName(kernelNr);
		if (kernelName == "RestoreGame")
			kernelIdRestore = kernelNr;
		if (kernelName == "SaveGame")
			kernelIdSave = kernelNr;
		if (kernelName == "Save")
			kernelIdSave = kernelIdRestore = kernelNr;
	}

	// Search for gameobject superclass ::restore
	uint16 gameSuperObjectMethodCount = gameSuperObject->getMethodCount();
	for (uint16 methodNr = 0; methodNr < gameSuperObjectMethodCount; methodNr++) {
		uint16 selectorId = gameSuperObject->getFuncSelector(methodNr);
		Common::String methodName = _kernel->getSelectorName(selectorId);
		if (methodName == "restore") {
#ifdef ENABLE_SCI32
			if (getSciVersion() >= SCI_VERSION_2) {
				patchGameSaveRestoreCodeSci2(segMan, gameSuperObject->getFunction(methodNr), kernelIdRestore, true);
			} else
#endif
				patchGameSaveRestoreCode(segMan, gameSuperObject->getFunction(methodNr), kernelIdRestore);
		}
		else if (methodName == "save") {
			if (_gameId != GID_FAIRYTALES) {	// Fairy Tales saves automatically without a dialog
#ifdef ENABLE_SCI32
				if (getSciVersion() >= SCI_VERSION_2) {
					patchGameSaveRestoreCodeSci2(segMan, gameSuperObject->getFunction(methodNr), kernelIdSave, false);
				} else
#endif
					patchGameSaveRestoreCode(segMan, gameSuperObject->getFunction(methodNr), kernelIdSave);
			}
		}
	}

	const Object *patchObjectSave = nullptr;

	if (getSciVersion() < SCI_VERSION_2) {
		// Patch gameobject ::save for now for SCI0 - SCI1.1
		// TODO: It seems this was never adjusted to superclass, but adjusting it now may cause
		// issues with some game. Needs to get checked and then possibly changed.
		patchObjectSave = gameObject;
	} else {
		// Patch superclass ::save for SCI32
		patchObjectSave = gameSuperObject;
	}

	// Search for gameobject ::save, if there is one patch that one too
	uint16 patchObjectMethodCount = patchObjectSave->getMethodCount();
	for (uint16 methodNr = 0; methodNr < patchObjectMethodCount; methodNr++) {
		uint16 selectorId = patchObjectSave->getFuncSelector(methodNr);
		Common::String methodName = _kernel->getSelectorName(selectorId);
		if (methodName == "save") {
			if (_gameId != GID_FAIRYTALES) {	// Fairy Tales saves automatically without a dialog
#ifdef ENABLE_SCI32
				if (getSciVersion() >= SCI_VERSION_2) {
					patchGameSaveRestoreCodeSci2(segMan, gameSuperObject->getFunction(methodNr), kernelIdSave, false);
				} else
#endif
					patchGameSaveRestoreCode(segMan, patchObjectSave->getFunction(methodNr), kernelIdSave);
			}
			break;
		}
	}
}

Common::Error SciEngine::run() {
	_resMan = new ResourceManager();
	assert(_resMan);
	_resMan->addAppropriateSources();
	_resMan->init();

	// TODO: Add error handling. Check return values of addAppropriateSources
	// and init. We first have to *add* sensible return values, though ;).
/*
	if (!_resMan) {
		warning("No resources found, aborting");
		return Common::kNoGameDataFoundError;
	}
*/

	// Reset, so that error()s before SoundCommandParser is initialized wont cause a crash
	_soundCmd = NULL;

	// Add the after market GM patches for the specified game, if they exist
	_resMan->addNewGMPatch(_gameId);
	_gameObjectAddress = _resMan->findGameObject();

	_scriptPatcher = new ScriptPatcher();
	SegManager *segMan = new SegManager(_resMan, _scriptPatcher);

	// Read user option for forcing hires graphics
	// Only show/selectable for:
	//  - King's Quest 6 CD
	//  - King's Quest 6 CD demo
	//  - Gabriel Knight 1 CD
	//  - Police Quest 4 CD
	// TODO: Check, if Gabriel Knight 1 floppy supports high resolution
	//
	// Gabriel Knight 1 on Mac is hi-res only, so it should NOT get this option.
	// Confirmed by [md5] and originally by clone2727.
	if (Common::checkGameGUIOption(GAMEOPTION_HIGH_RESOLUTION_GRAPHICS, ConfMan.get("guioptions"))) {
		// GAMEOPTION_HIGH_RESOLUTION_GRAPHICS is available for the currently detected game,
		// so read the user option now.
		// We need to do this, because the option's default is "true", but we don't want "true"
		// for any game that does not have this option.
		_forceHiresGraphics = ConfMan.getBool("enable_high_resolution_graphics");
	}

	if (getSciVersion() < SCI_VERSION_2) {
		// Initialize the game screen
		_gfxScreen = new GfxScreen(_resMan);
		_gfxScreen->enableUndithering(ConfMan.getBool("disable_dithering"));
	} else {
		_gfxScreen = nullptr;
	}

	_kernel = new Kernel(_resMan, segMan);
	_kernel->init();

	_features = new GameFeatures(segMan, _kernel);
	// Only SCI0, SCI01 and SCI1 EGA games used a parser
	_vocabulary = (getSciVersion() <= SCI_VERSION_1_EGA_ONLY) ? new Vocabulary(_resMan, false) : NULL;
	// Also, XMAS1990 apparently had a parser too. Refer to http://forums.scummvm.org/viewtopic.php?t=9135
	if (getGameId() == GID_CHRISTMAS1990)
		_vocabulary = new Vocabulary(_resMan, false);

	_gamestate = new EngineState(segMan);
	_eventMan = new EventManager(_resMan->detectFontExtended());
#ifdef ENABLE_SCI32
	if (getSciVersion() >= SCI_VERSION_2_1_EARLY) {
		_audio32 = new Audio32(_resMan);
	} else
#endif
		_audio = new AudioPlayer(_resMan);
#ifdef ENABLE_SCI32
	if (getSciVersion() >= SCI_VERSION_2) {
		_video32 = new Video32(segMan, _eventMan);
	}
#endif
	_sync = new Sync(_resMan, segMan);

	// Create debugger console. It requires GFX and _gamestate to be initialized
	_console = new Console(this);

	// The game needs to be initialized before the graphics system is initialized, as
	// the graphics code checks parts of the seg manager upon initialization (e.g. for
	// the presence of the fastCast object)
	if (!initGame()) { /* Initialize */
		warning("Game initialization failed: Aborting...");
		// TODO: Add an "init failed" error?
		return Common::kUnknownError;
	}

	// we try to find the super class address of the game object, we can't do that earlier
	const Object *gameObject = segMan->getObject(_gameObjectAddress);
	if (!gameObject) {
		warning("Could not get game object, aborting...");
		return Common::kUnknownError;
	}

	script_adjust_opcode_formats();

	// Must be called after game_init(), as they use _features
	_kernel->loadKernelNames(_features);

//.........这里部分代码省略.........

void SciEngine::patchGameSaveRestore() {
	SegManager *segMan = _gamestate->_segMan;
	const Object *gameObject = segMan->getObject(_gameObjectAddress);
	const uint16 gameMethodCount = gameObject->getMethodCount();
	const Object *gameSuperObject = segMan->getObject(_gameSuperClassAddress);
	if (!gameSuperObject)
		gameSuperObject = gameObject;	// happens in KQ5CD, when loading saved games before r54510
	const uint16 gameSuperMethodCount = gameSuperObject->getMethodCount();
	reg_t methodAddress;
	const uint16 kernelCount = _kernel->getKernelNamesSize();
	const byte *scriptRestorePtr = NULL;
	byte kernelIdRestore = 0;
	const byte *scriptSavePtr = NULL;
	byte kernelIdSave = 0;

	// this feature is currently not supported on SCI32
	if (getSciVersion() >= SCI_VERSION_2)
		return;

	switch (_gameId) {
	case GID_MOTHERGOOSE256: // mother goose saves/restores directly and has no save/restore dialogs
	case GID_JONES: // gets confused, when we patch us in, the game is only able to save to 1 slot, so hooking is not required
	case GID_HOYLE1: // gets confused, although the game doesnt support saving/restoring at all
	case GID_HOYLE2: // gets confused, see hoyle1
		return;
	default:
		break;
	}

	if (ConfMan.getBool("sci_originalsaveload"))
		return;

	for (uint16 kernelNr = 0; kernelNr < kernelCount; kernelNr++) {
		Common::String kernelName = _kernel->getKernelName(kernelNr);
		if (kernelName == "RestoreGame")
			kernelIdRestore = kernelNr;
		if (kernelName == "SaveGame")
			kernelIdSave = kernelNr;
	}

	// Search for gameobject-superclass ::restore
	for (uint16 methodNr = 0; methodNr < gameSuperMethodCount; methodNr++) {
		uint16 selectorId = gameSuperObject->getFuncSelector(methodNr);
		Common::String methodName = _kernel->getSelectorName(selectorId);
		if (methodName == "restore") {
			methodAddress = gameSuperObject->getFunction(methodNr);
			Script *script = segMan->getScript(methodAddress.segment);
			scriptRestorePtr = script->getBuf(methodAddress.offset);
		}
		if (methodName == "save") {
			methodAddress = gameSuperObject->getFunction(methodNr);
			Script *script = segMan->getScript(methodAddress.segment);
			scriptSavePtr = script->getBuf(methodAddress.offset);
		}
	}

	// Search for gameobject ::save, if there is one patch that one instead
	for (uint16 methodNr = 0; methodNr < gameMethodCount; methodNr++) {
		uint16 selectorId = gameObject->getFuncSelector(methodNr);
		Common::String methodName = _kernel->getSelectorName(selectorId);
		if (methodName == "save") {
			methodAddress = gameObject->getFunction(methodNr);
			Script *script = segMan->getScript(methodAddress.segment);
			scriptSavePtr = script->getBuf(methodAddress.offset);
			break;
		}
	}

	switch (_gameId) {
	case GID_FAIRYTALES: // fairy tales automatically saves w/o dialog
		scriptSavePtr = NULL;
	default:
		break;
	}

	if (scriptRestorePtr) {
		// Now patch in our code
		byte *patchPtr = const_cast<byte *>(scriptRestorePtr);
		memcpy(patchPtr, patchGameRestoreSave, sizeof(patchGameRestoreSave));
		patchPtr[8] = kernelIdRestore;
	}
	if (scriptSavePtr) {
		// Now patch in our code
		byte *patchPtr = const_cast<byte *>(scriptSavePtr);
		memcpy(patchPtr, patchGameRestoreSave, sizeof(patchGameRestoreSave));
		patchPtr[8] = kernelIdSave;
	}
}

Common::Error SciEngine::run() {
	g_eventRec.registerRandomSource(_rng, "sci");

	// Assign default values to the config manager, in case settings are missing
	ConfMan.registerDefault("sci_originalsaveload", "false");
	ConfMan.registerDefault("native_fb01", "false");
	ConfMan.registerDefault("windows_cursors", "false");	// Windows cursors for KQ6 Windows

	_resMan = new ResourceManager();
	assert(_resMan);
	_resMan->addAppropriateSources();
	_resMan->init();

	// TODO: Add error handling. Check return values of addAppropriateSources
	// and init. We first have to *add* sensible return values, though ;).
/*
	if (!_resMan) {
		warning("No resources found, aborting");
		return Common::kNoGameDataFoundError;
	}
*/

	// Reset, so that error()s before SoundCommandParser is initialized wont cause a crash
	_soundCmd = NULL;

	// Add the after market GM patches for the specified game, if they exist
	_resMan->addNewGMPatch(_gameId);
	_gameObjectAddress = _resMan->findGameObject();
	_gameSuperClassAddress = NULL_REG;

	SegManager *segMan = new SegManager(_resMan);

	// Initialize the game screen
	_gfxScreen = new GfxScreen(_resMan);
	_gfxScreen->debugUnditherSetState(ConfMan.getBool("disable_dithering"));

	// Create debugger console. It requires GFX to be initialized
	_console = new Console(this);
	_kernel = new Kernel(_resMan, segMan);

	_features = new GameFeatures(segMan, _kernel);
	// Only SCI0, SCI01 and SCI1 EGA games used a parser
	_vocabulary = (getSciVersion() <= SCI_VERSION_1_EGA) ? new Vocabulary(_resMan, false) : NULL;
	// Also, XMAS1990 apparently had a parser too. Refer to http://forums.scummvm.org/viewtopic.php?t=9135
	if (getGameId() == GID_CHRISTMAS1990)
		_vocabulary = new Vocabulary(_resMan, false);
	_audio = new AudioPlayer(_resMan);
	_gamestate = new EngineState(segMan);
	_eventMan = new EventManager(_resMan->detectFontExtended());

	// The game needs to be initialized before the graphics system is initialized, as
	// the graphics code checks parts of the seg manager upon initialization (e.g. for
	// the presence of the fastCast object)
	if (!initGame()) { /* Initialize */
		warning("Game initialization failed: Aborting...");
		// TODO: Add an "init failed" error?
		return Common::kUnknownError;
	}

	// we try to find the super class address of the game object, we can't do that earlier
	const Object *gameObject = segMan->getObject(_gameObjectAddress);
	if (!gameObject) {
		warning("Could not get game object, aborting...");
		return Common::kUnknownError;
	}
	_gameSuperClassAddress = gameObject->getSuperClassSelector();

	script_adjust_opcode_formats();

	// Must be called after game_init(), as they use _features
	_kernel->loadKernelNames(_features);
	_soundCmd = new SoundCommandParser(_resMan, segMan, _kernel, _audio, _features->detectDoSoundType());

	syncSoundSettings();
	syncIngameAudioOptions();

	// Initialize all graphics related subsystems
	initGraphics();

	debug("Emulating SCI version %s\n", getSciVersionDesc(getSciVersion()));

	// Patch in our save/restore code, so that dialogs are replaced
	patchGameSaveRestore();
	setLauncherLanguage();

	// Check whether loading a savestate was requested
	int directSaveSlotLoading = ConfMan.getInt("save_slot");
	if (directSaveSlotLoading >= 0) {
		// call GameObject::play (like normally)
		initStackBaseWithSelector(SELECTOR(play));
		// We set this, so that the game automatically quit right after init
		_gamestate->variables[VAR_GLOBAL][4] = TRUE_REG;

		_gamestate->_executionStackPosChanged = false;
		run_vm(_gamestate);

		// As soon as we get control again, actually restore the game
		reg_t restoreArgv[2] = { NULL_REG, make_reg(0, directSaveSlotLoading) };	// special call (argv[0] is NULL)
		kRestoreGame(_gamestate, 2, restoreArgv);

//.........这里部分代码省略.........

void SciEngine::patchGameSaveRestore() {
	SegManager *segMan = _gamestate->_segMan;
	const Object *gameObject = segMan->getObject(_gameObjectAddress);
	const Object *gameSuperObject = segMan->getObject(gameObject->getSuperClassSelector());
	if (!gameSuperObject)
		gameSuperObject = gameObject;	// happens in KQ5CD, when loading saved games before r54510
	byte kernelIdRestore = 0;
	byte kernelIdSave = 0;

	switch (_gameId) {
	case GID_HOYLE1: // gets confused, although the game doesnt support saving/restoring at all
	case GID_HOYLE2: // gets confused, see hoyle1
	case GID_JONES: // gets confused, when we patch us in, the game is only able to save to 1 slot, so hooking is not required
	case GID_MOTHERGOOSE256: // mother goose saves/restores directly and has no save/restore dialogs
	case GID_PHANTASMAGORIA: // has custom save/load code
	case GID_SHIVERS: // has custom save/load code
		return;
	default:
		break;
	}

	if (ConfMan.getBool("originalsaveload"))
		return;

	uint16 kernelNamesSize = _kernel->getKernelNamesSize();
	for (uint16 kernelNr = 0; kernelNr < kernelNamesSize; kernelNr++) {
		Common::String kernelName = _kernel->getKernelName(kernelNr);
		if (kernelName == "RestoreGame")
			kernelIdRestore = kernelNr;
		if (kernelName == "SaveGame")
			kernelIdSave = kernelNr;
		if (kernelName == "Save")
			kernelIdSave = kernelIdRestore = kernelNr;
	}

	// Search for gameobject superclass ::restore
	uint16 gameSuperObjectMethodCount = gameSuperObject->getMethodCount();
	for (uint16 methodNr = 0; methodNr < gameSuperObjectMethodCount; methodNr++) {
		uint16 selectorId = gameSuperObject->getFuncSelector(methodNr);
		Common::String methodName = _kernel->getSelectorName(selectorId);
		if (methodName == "restore") {
			if (kernelIdSave != kernelIdRestore)
				patchGameSaveRestoreCode(segMan, gameSuperObject->getFunction(methodNr), kernelIdRestore);
			else
				patchGameSaveRestoreCodeSci21(segMan, gameSuperObject->getFunction(methodNr), kernelIdRestore, true);
		}
		else if (methodName == "save") {
			if (_gameId != GID_FAIRYTALES) {	// Fairy Tales saves automatically without a dialog
				if (kernelIdSave != kernelIdRestore)
					patchGameSaveRestoreCode(segMan, gameSuperObject->getFunction(methodNr), kernelIdSave);
				else
					patchGameSaveRestoreCodeSci21(segMan, gameSuperObject->getFunction(methodNr), kernelIdSave, false);
			}
		}
	}

	// Search for gameobject ::save, if there is one patch that one too
	uint16 gameObjectMethodCount = gameObject->getMethodCount();
	for (uint16 methodNr = 0; methodNr < gameObjectMethodCount; methodNr++) {
		uint16 selectorId = gameObject->getFuncSelector(methodNr);
		Common::String methodName = _kernel->getSelectorName(selectorId);
		if (methodName == "save") {
			if (_gameId != GID_FAIRYTALES) {	// Fairy Tales saves automatically without a dialog
				if (kernelIdSave != kernelIdRestore)
					patchGameSaveRestoreCode(segMan, gameObject->getFunction(methodNr), kernelIdSave);
				else
					patchGameSaveRestoreCodeSci21(segMan, gameObject->getFunction(methodNr), kernelIdSave, false);
			}
			break;
		}
	}
}