示例#1
0
void MapBlock::serialize(std::ostream &os, u8 version)
{
	if(!ser_ver_supported(version))
		throw VersionMismatchException("ERROR: MapBlock format not supported");
	
	if(data == NULL)
	{
		throw SerializationError("ERROR: Not writing dummy block.");
	}
	
	// These have no compression
	if(version <= 3 || version == 5 || version == 6)
	{
		u32 nodecount = MAP_BLOCKSIZE*MAP_BLOCKSIZE*MAP_BLOCKSIZE;
		
		u32 buflen = 1 + nodecount * MapNode::serializedLength(version);
		SharedBuffer<u8> dest(buflen);

		dest[0] = is_underground;
		for(u32 i=0; i<nodecount; i++)
		{
			u32 s = 1 + i * MapNode::serializedLength(version);
			data[i].serialize(&dest[s], version);
		}
		
		os.write((char*)*dest, dest.getSize());
	}
	else if(version <= 10)
	{
		/*
			With compression.
			Compress the materials and the params separately.
		*/
		
		// First byte
		os.write((char*)&is_underground, 1);

		u32 nodecount = MAP_BLOCKSIZE*MAP_BLOCKSIZE*MAP_BLOCKSIZE;

		// Get and compress materials
		SharedBuffer<u8> materialdata(nodecount);
		for(u32 i=0; i<nodecount; i++)
		{
			materialdata[i] = data[i].param0;
		}
		compress(materialdata, os, version);

		// Get and compress lights
		SharedBuffer<u8> lightdata(nodecount);
		for(u32 i=0; i<nodecount; i++)
		{
			lightdata[i] = data[i].param1;
		}
		compress(lightdata, os, version);
		
		if(version >= 10)
		{
			// Get and compress param2
			SharedBuffer<u8> param2data(nodecount);
			for(u32 i=0; i<nodecount; i++)
			{
				param2data[i] = data[i].param2;
			}
			compress(param2data, os, version);
		}
	}
	// All other versions (newest)
	else
	{
		// First byte
		u8 flags = 0;
		if(is_underground)
			flags |= 0x01;
		if(m_day_night_differs)
			flags |= 0x02;
		if(m_lighting_expired)
			flags |= 0x04;
		if(version >= 18)
		{
			if(m_generated == false)
				flags |= 0x08;
		}
		os.write((char*)&flags, 1);
		
		u32 nodecount = MAP_BLOCKSIZE*MAP_BLOCKSIZE*MAP_BLOCKSIZE;

		/*
			Get data
		*/

		// Serialize nodes
		SharedBuffer<u8> databuf_nodelist(nodecount*3);
		for(u32 i=0; i<nodecount; i++)
		{
			data[i].serialize(&databuf_nodelist[i*3], version);
		}
		
		// Create buffer with different parameters sorted
		SharedBuffer<u8> databuf(nodecount*3);
		for(u32 i=0; i<nodecount; i++)
		{
			databuf[i] = databuf_nodelist[i*3];
			databuf[i+nodecount] = databuf_nodelist[i*3+1];
			databuf[i+nodecount*2] = databuf_nodelist[i*3+2];
		}

		/*
			Compress data to output stream
		*/

		compress(databuf, os, version);
		
		/*
			NodeMetadata
		*/
		if(version >= 14)
		{
			if(version <= 15)
			{
				try{
					std::ostringstream oss(std::ios_base::binary);
					m_node_metadata->serialize(oss);
					os<<serializeString(oss.str());
				}
				// This will happen if the string is longer than 65535
				catch(SerializationError &e)
				{
					// Use an empty string
					os<<serializeString("");
				}
			}
			else
			{
				std::ostringstream oss(std::ios_base::binary);
				m_node_metadata->serialize(oss);
				compressZlib(oss.str(), os);
				//os<<serializeLongString(oss.str());
			}
		}
	}
}
示例#2
0
void MapBlock::serialize_pre22(std::ostream &os, u8 version, bool disk)
{
	u32 nodecount = MAP_BLOCKSIZE*MAP_BLOCKSIZE*MAP_BLOCKSIZE;

	MapNode *tmp_data = new MapNode[nodecount];
	
	// Legacy data changes
	// This code has to change from post-22 to pre-22 format.
	INodeDefManager *nodedef = m_gamedef->ndef();
	for(u32 i=0; i<nodecount; i++)
	{
		const ContentFeatures &f = nodedef->get(tmp_data[i].getContent());
		// Mineral
		if(nodedef->getId("default:stone_with_coal") == tmp_data[i].getContent())
		{
			tmp_data[i].setContent(nodedef->getId("default:stone"));
			tmp_data[i].setParam1(1);  // MINERAL_COAL
		}
		else if(nodedef->getId("default:stone_with_iron") == tmp_data[i].getContent())
		{
			tmp_data[i].setContent(nodedef->getId("default:stone"));
			tmp_data[i].setParam1(2);  // MINERAL_IRON
		}
		// facedir_simple
		if(f.legacy_facedir_simple)
		{
			tmp_data[i].setParam1(tmp_data[i].getParam2());
			tmp_data[i].setParam2(0);
		}
		// wall_mounted
		if(f.legacy_wallmounted)
		{
			u8 wallmounted_new_to_old[8] = {0x04, 0x08, 0x01, 0x02, 0x10, 0x20, 0, 0};
			u8 dir_new_format = tmp_data[i].getParam2() & 7; // lowest 3 bits
			u8 dir_old_format = wallmounted_new_to_old[dir_new_format];
			tmp_data[i].setParam2(dir_old_format);
		}
	}

	// Serialize nodes
	u32 ser_length = MapNode::serializedLength(version);
	SharedBuffer<u8> databuf_nodelist(nodecount * ser_length);
	for(u32 i=0; i<nodecount; i++)
	{
		tmp_data[i].serialize(&databuf_nodelist[i*ser_length], version);
	}

	delete[] tmp_data;
		
	// These have no compression
	if(version <= 3 || version == 5 || version == 6)
	{
		writeU8(os, is_underground);
		os.write((char*)*databuf_nodelist, databuf_nodelist.getSize());
	}
	else if(version <= 10)
	{
		/*
			With compression.
			Compress the materials and the params separately.
		*/
		
		// First byte
		writeU8(os, is_underground);

		// Get and compress materials
		SharedBuffer<u8> materialdata(nodecount);
		for(u32 i=0; i<nodecount; i++)
		{
			materialdata[i] = databuf_nodelist[i*ser_length];
		}
		compress(materialdata, os, version);

		// Get and compress lights
		SharedBuffer<u8> lightdata(nodecount);
		for(u32 i=0; i<nodecount; i++)
		{
			lightdata[i] = databuf_nodelist[i*ser_length+1];
		}
		compress(lightdata, os, version);
		
		if(version >= 10)
		{
			// Get and compress param2
			SharedBuffer<u8> param2data(nodecount);
			for(u32 i=0; i<nodecount; i++)
			{
				param2data[i] = databuf_nodelist[i*ser_length+2];
			}
			compress(param2data, os, version);
		}
	}
	// All other versions (newest)
	else
	{
		// First byte
		u8 flags = 0;
		if(is_underground)
			flags |= 0x01;
		if(m_day_night_differs)
			flags |= 0x02;
		if(m_lighting_expired)
			flags |= 0x04;
		if(version >= 18)
		{
			if(m_generated == false)
				flags |= 0x08;
		}
		writeU8(os, flags);
		
		/*
			Get data
		*/

		// Create buffer with different parameters sorted
		SharedBuffer<u8> databuf(nodecount*3);
		for(u32 i=0; i<nodecount; i++)
		{
			databuf[i] = databuf_nodelist[i*ser_length];
			databuf[i+nodecount] = databuf_nodelist[i*ser_length+1];
			databuf[i+nodecount*2] = databuf_nodelist[i*ser_length+2];
		}

		/*
			Compress data to output stream
		*/

		compress(databuf, os, version);
		
		/*
			NodeMetadata
		*/
		if(version >= 14)
		{
			if(version <= 15)
			{
				try{
					std::ostringstream oss(std::ios_base::binary);
					m_node_metadata->serialize(oss);
					os<<serializeString(oss.str());
				}
				// This will happen if the string is longer than 65535
				catch(SerializationError &e)
				{
					// Use an empty string
					os<<serializeString("");
				}
			}
			else
			{
				std::ostringstream oss(std::ios_base::binary);
				m_node_metadata->serialize(oss);
				compressZlib(oss.str(), os);
				//os<<serializeLongString(oss.str());
			}
		}
	}


	if(disk)
	{
		// Versions up from 9 have block objects. (DEPRECATED)
		if(version >= 9)
		{
			// count=0
			writeU16(os, 0);
		}

		// Versions up from 15 have static objects.
		if(version >= 15)
		{
			m_static_objects.serialize(os);
		}

		// Timestamp
		if(version >= 17)
		{
			writeU32(os, getTimestamp());
		}

		// Scan and write node definition id mapping
		if(version >= 21)
		{
			NameIdMapping nimap;
			getBlockNodeIdMapping_pre22(&nimap, data, m_gamedef->ndef());
			nimap.serialize(os);
		}
	}
}