C++ OutputPersistenceBlock类代码示例

bool WalkRegion::persist(OutputPersistenceBlock &writer) {
	bool result = true;

	// Persist the parent region
	result &= Region::persist(writer);

	// Persist the nodes
	writer.write((uint32)_nodes.size());
	Common::Array<Vertex>::const_iterator it = _nodes.begin();
	while (it != _nodes.end()) {
		writer.write((int32)it->x);
		writer.write((int32)it->y);
		++it;
	}

	// Persist the visibility matrix
	writer.write((uint32)_visibilityMatrix.size());
	Common::Array< Common::Array<int> >::const_iterator rowIter = _visibilityMatrix.begin();
	while (rowIter != _visibilityMatrix.end()) {
		writer.write((uint32)rowIter->size());
		Common::Array<int>::const_iterator colIter = rowIter->begin();
		while (colIter != rowIter->end()) {
			writer.write((int32)*colIter);
			++colIter;
		}

		++rowIter;
	}

	return result;
}

bool Polygon::persist(OutputPersistenceBlock &writer) {
	writer.write(vertexCount);
	for (int i = 0; i < vertexCount; ++i) {
		writer.write(vertices[i].x);
		writer.write(vertices[i].y);
	}

	return true;
}

bool Bitmap::persist(OutputPersistenceBlock &writer) {
	bool result = true;

	result &= RenderObject::persist(writer);
	writer.write(_flipH);
	writer.write(_flipV);
	writer.write(_scaleFactorX);
	writer.write(_scaleFactorY);
	writer.write(_modulationColor);
	writer.write(_originalWidth);
	writer.write(_originalHeight);

	return result;
}

bool Text::persist(OutputPersistenceBlock &writer) {
	bool result = true;

	result &= RenderObject::persist(writer);

	writer.write(_modulationColor);
	writer.writeString(_font);
	writer.writeString(_text);
	writer.write(_autoWrap);
	writer.write(_autoWrapThreshold);

	result &= RenderObject::persistChildren(writer);

	return result;
}

bool InputEngine::persist(OutputPersistenceBlock &writer) {
	// Write out the number of command callbacks and their names.
	// Note: We do this only for compatibility with older engines resp.
	// the original engine.
	writer.write((uint32)1);
	writer.writeString("LuaCommandCB");

	// Write out the number of command callbacks and their names.
	// Note: We do this only for compatibility with older engines resp.
	// the original engine.
	writer.write((uint32)1);
	writer.writeString("LuaCharacterCB");

	return true;
}

bool AnimationTemplate::persist(OutputPersistenceBlock &writer) {
	bool Result = true;

	// Parent persistieren.
	Result &= AnimationDescription::persist(writer);

	// Frameanzahl schreiben.
	writer.write(_frames.size());

	// Frames einzeln persistieren.
	Common::Array<const Frame>::const_iterator Iter = _frames.begin();
	while (Iter != _frames.end()) {
		writer.write(Iter->hotspotX);
		writer.write(Iter->hotspotY);
		writer.write(Iter->flipV);
		writer.write(Iter->flipH);
		writer.writeString(Iter->fileName);
		writer.writeString(Iter->action);
		++Iter;
	}

	// Restliche Member persistieren.
	writer.writeString(_sourceAnimationPtr->getFileName());
	writer.write(_valid);

	return Result;
}

bool StaticBitmap::persist(OutputPersistenceBlock &writer) {
	bool result = true;

	result &= Bitmap::persist(writer);
	writer.writeString(_resourceFilename);

	result &= RenderObject::persistChildren(writer);

	return result;
}

bool RenderObjectManager::persist(OutputPersistenceBlock &writer) {
	bool result = true;

	// Alle Kinder des Wurzelknotens speichern. Dadurch werden alle BS_RenderObjects gespeichert rekursiv gespeichert.
	result &= _rootPtr->persistChildren(writer);

	writer.write(_frameStarted);

	// Referenzen auf die TimedRenderObjects persistieren.
	writer.write((uint32)_timedRenderObjects.size());
	RenderObjectList::const_iterator iter = _timedRenderObjects.begin();
	while (iter != _timedRenderObjects.end()) {
		writer.write((*iter)->getHandle());
		++iter;
	}

	// Alle BS_AnimationTemplates persistieren.
	result &= AnimationTemplateRegistry::instance().persist(writer);

	return result;
}

// Persistence
bool Region::persist(OutputPersistenceBlock &writer) {
	bool Result = true;

	writer.write(static_cast<uint32>(_type));
	writer.write(_valid);
	writer.write((int32)_position.x);
	writer.write((int32)_position.y);

	writer.write((uint32)_polygons.size());
	Common::Array<Polygon>::iterator It = _polygons.begin();
	while (It != _polygons.end()) {
		Result &= It->persist(writer);
		++It;
	}

	writer.write((int32)_boundingBox.left);
	writer.write((int32)_boundingBox.top);
	writer.write((int32)_boundingBox.right);
	writer.write((int32)_boundingBox.bottom);

	return Result;
}

bool LuaScriptEngine::persist(OutputPersistenceBlock &writer) {
	// Empty the Lua stack. pluto_persist() xepects that the stack is empty except for its parameters
	lua_settop(_state, 0);

	// Garbage Collection erzwingen.
	lua_gc(_state, LUA_GCCOLLECT, 0);

	// Permanents-Table is set on the stack
	// pluto_persist expects these two items on the Lua stack
	pushPermanentsTable(_state, PTT_PERSIST);
	lua_getglobal(_state, "_G");

	// Lua persists and stores the data in a Common::Array
	Common::Array<byte> chunkData;
	pluto_persist(_state, chunkwriter, &chunkData);

	// Persistenzdaten in den Writer schreiben.
	writer.writeByteArray(chunkData);

	// Die beiden Tabellen vom Stack nehmen.
	lua_pop(_state, 2);

	return true;
}

bool PersistenceService::saveGame(uint slotID, const Common::String &screenshotFilename) {
	// FIXME: This code is a hack which bypasses the savefile API,
	// and should eventually be removed.

	// Überprüfen, ob die Slot-ID zulässig ist.
	if (slotID >= SLOT_COUNT) {
		error("Tried to save to an invalid slot (%d). Only slot ids form 0 to %d are allowed.", slotID, SLOT_COUNT - 1);
		return false;
	}

	// Dateinamen erzeugen.
	Common::String filename = generateSavegameFilename(slotID);

	// Spielstanddatei öffnen und die Headerdaten schreiben.
	Common::SaveFileManager *sfm = g_system->getSavefileManager();
	Common::OutSaveFile *file = sfm->openForSaving(filename);

	file->writeString(FILE_MARKER);
	file->writeByte(0);
	file->writeString(VERSIONID);
	file->writeByte(0);

	char buf[20];
	snprintf(buf, 20, "%d", VERSIONNUM);
	file->writeString(buf);
	file->writeByte(0);

	TimeDate dt;
	g_system->getTimeAndDate(dt);
	file->writeString(formatTimestamp(dt));
	file->writeByte(0);

	if (file->err()) {
		error("Unable to write header data to savegame file \"%s\".", filename.c_str());
	}

	// Alle notwendigen Module persistieren.
	OutputPersistenceBlock writer;
	bool success = true;
	success &= Kernel::getInstance()->getScript()->persist(writer);
	success &= RegionRegistry::instance().persist(writer);
	success &= Kernel::getInstance()->getGfx()->persist(writer);
	success &= Kernel::getInstance()->getSfx()->persist(writer);
	success &= Kernel::getInstance()->getInput()->persist(writer);
	if (!success) {
		error("Unable to persist modules for savegame file \"%s\".", filename.c_str());
	}

	// Write the save game data uncompressed, since the final saved game will be
	// compressed anyway.
	char sBuffer[10];
	snprintf(sBuffer, 10, "%u", writer.getDataSize());
	file->writeString(sBuffer);
	file->writeByte(0);
	snprintf(sBuffer, 10, "%u", writer.getDataSize());
	file->writeString(sBuffer);
	file->writeByte(0);
	file->write(writer.getData(), writer.getDataSize());

	// Get the screenshot
	Common::SeekableReadStream *thumbnail = Kernel::getInstance()->getGfx()->getThumbnail();

	if (thumbnail) {
		byte *buffer = new byte[FILE_COPY_BUFFER_SIZE];
		thumbnail->seek(0, SEEK_SET);
		while (!thumbnail->eos()) {
			int bytesRead = thumbnail->read(&buffer[0], FILE_COPY_BUFFER_SIZE);
			file->write(&buffer[0], bytesRead);
		}

		delete[] buffer;
	} else {
		warning("The screenshot file \"%s\" does not exist. Savegame is written without a screenshot.", filename.c_str());
	}

	file->finalize();
	delete file;

	// Savegameinformationen für diesen Slot aktualisieren.
	_impl->readSlotSavegameInformation(slotID);

	// Empty the cache, to remove old thumbnails
	Kernel::getInstance()->getResourceManager()->emptyThumbnailCache();

	// Erfolg signalisieren.
	return true;
}

bool SoundEngine::persist(OutputPersistenceBlock &writer) {
	writer.write(_maxHandleId);

	for (uint i = 0; i < SOUND_HANDLES; i++) {
		writer.write(_handles[i].id);

		// Don't restart sounds which already finished playing.
		if (_handles[i].type != kFreeHandle && !_mixer->isSoundHandleActive(_handles[i].handle))
			_handles[i].type = kFreeHandle;

		writer.writeString(_handles[i].fileName);
		if (_handles[i].type == kFreeHandle)
			writer.write((int32)-1);
		else
			writer.write(_handles[i].sndType);
		writer.write(_handles[i].volume);
		writer.write(_handles[i].pan);
		writer.write(_handles[i].loop);
		writer.write(_handles[i].loopStart);
		writer.write(_handles[i].loopEnd);
		writer.write(_handles[i].layer);
	}

	return true;
}