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/* * Copyright (c) 2019-2021 GeyserMC. http://geysermc.org * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. * * @author GeyserMC * @link https://github.com/GeyserMC/Geyser */package org.geysermc.connector.network.translators.java.world;import com.github.steveice10.mc.protocol.data.game.chunk.Column;import com.github.steveice10.mc.protocol.packet.ingame.server.world.ServerChunkDataPacket;import com.nukkitx.nbt.NBTOutputStream;import com.nukkitx.nbt.NbtMap;import com.nukkitx.nbt.NbtUtils;import com.nukkitx.network.VarInts;import com.nukkitx.protocol.bedrock.packet.LevelChunkPacket;import io.netty.buffer.ByteBuf;import io.netty.buffer.ByteBufAllocator;import io.netty.buffer.ByteBufOutputStream;import org.geysermc.connector.GeyserConnector;import org.geysermc.connector.network.session.GeyserSession;import org.geysermc.connector.network.translators.PacketTranslator;import org.geysermc.connector.network.translators.Translator;import org.geysermc.connector.network.translators.world.chunk.ChunkSection;import org.geysermc.connector.network.translators.world.BiomeTranslator;import org.geysermc.connector.utils.ChunkUtils;import static org.geysermc.connector.utils.ChunkUtils.MINIMUM_ACCEPTED_HEIGHT;import static org.geysermc.connector.utils.ChunkUtils.MINIMUM_ACCEPTED_HEIGHT_OVERWORLD;@Translator(packet = ServerChunkDataPacket.class)public class JavaChunkDataTranslator extends PacketTranslator<ServerChunkDataPacket> { // Caves and cliffs supports 3D biomes by implementing a very similar palette system to blocks private static final boolean NEW_BIOME_WRITE = GeyserConnector.getInstance().getConfig().isExtendedWorldHeight(); @Override public void translate(GeyserSession session, ServerChunkDataPacket packet) { if (session.isSpawned()) { ChunkUtils.updateChunkPosition(session, session.getPlayerEntity().getPosition().toInt()); } session.getChunkCache().addToCache(packet.getColumn()); Column column = packet.getColumn(); // Ensure that, if the player is using lower world heights, the position is not offset int yOffset = session.getChunkCache().getChunkMinY(); GeyserConnector.getInstance().getGeneralThreadPool().execute(() -> { try { if (session.isClosed()) { return; } ChunkUtils.ChunkData chunkData = ChunkUtils.translateToBedrock(session, column, yOffset); ChunkSection[] sections = chunkData.getSections(); // Find highest section int sectionCount = sections.length - 1; while (sectionCount >= 0 && sections[sectionCount] == null) { sectionCount--; } sectionCount++; // Estimate chunk size int size = 0; for (int i = 0; i < sectionCount; i++) { ChunkSection section = sections[i]; size += (section != null ? section : session.getBlockMappings().getEmptyChunkSection()).estimateNetworkSize(); } if (NEW_BIOME_WRITE) { size += ChunkUtils.EMPTY_CHUNK_DATA.length; // Consists only of biome data } else { size += 256; // Biomes pre-1.18 } size += 1; // Border blocks size += 1; // Extra data length (always 0) size += chunkData.getBlockEntities().length * 64; // Conservative estimate of 64 bytes per tile entity // Allocate output buffer ByteBuf byteBuf = ByteBufAllocator.DEFAULT.buffer(size); byte[] payload; try { for (int i = 0; i < sectionCount; i++) { ChunkSection section = sections[i]; (section != null ? section : session.getBlockMappings().getEmptyChunkSection()).writeToNetwork(byteBuf); } if (NEW_BIOME_WRITE) { // At this point we're dealing with Bedrock chunk sections boolean overworld = session.getChunkCache().isExtendedHeight(); int dimensionOffset = (overworld ? MINIMUM_ACCEPTED_HEIGHT_OVERWORLD : MINIMUM_ACCEPTED_HEIGHT) >> 4; for (int i = 0; i < sectionCount; i++) { int biomeYOffset = dimensionOffset + i; if (biomeYOffset < yOffset) { // Ignore this biome section since it goes below the height of the Java world byteBuf.writeBytes(ChunkUtils.EMPTY_BIOME_DATA); continue; } BiomeTranslator.toNewBedrockBiome(session, column.getBiomeData(), i + (dimensionOffset - yOffset)).writeToNetwork(byteBuf); } // As of 1.17.10, Bedrock hardcodes to always read 32 biome sections int remainingEmptyBiomes = 32 - sectionCount; for (int i = 0; i < remainingEmptyBiomes; i++) { byteBuf.writeBytes(ChunkUtils.EMPTY_BIOME_DATA); } } else { byteBuf.writeBytes(BiomeTranslator.toBedrockBiome(session, column.getBiomeData())); // Biomes - 256 bytes } byteBuf.writeByte(0); // Border blocks - Edu edition only VarInts.writeUnsignedInt(byteBuf, 0); // extra data length, 0 for now // Encode tile entities into buffer NBTOutputStream nbtStream = NbtUtils.createNetworkWriter(new ByteBufOutputStream(byteBuf)); for (NbtMap blockEntity : chunkData.getBlockEntities()) { nbtStream.writeTag(blockEntity); } // Copy data into byte[], because the protocol lib really likes things that are s l o w byteBuf.readBytes(payload = new byte[byteBuf.readableBytes()]); } finally { byteBuf.release(); // Release buffer to allow buffer pooling to be useful } LevelChunkPacket levelChunkPacket = new LevelChunkPacket(); levelChunkPacket.setSubChunksLength(sectionCount); levelChunkPacket.setCachingEnabled(false); levelChunkPacket.setChunkX(column.getX()); levelChunkPacket.setChunkZ(column.getZ()); levelChunkPacket.setData(payload); session.sendUpstreamPacket(levelChunkPacket); } catch (Exception ex) { ex.printStackTrace(); } }); }} |