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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();
}
});
}
}
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