89 lines
3 KiB
Java
89 lines
3 KiB
Java
package net.minecraft.network.protocol.game;
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import io.netty.buffer.ByteBuf;
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import io.netty.buffer.Unpooled;
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import java.util.List;
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import net.minecraft.network.FriendlyByteBuf;
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import net.minecraft.network.codec.StreamCodec;
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import net.minecraft.network.protocol.Packet;
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import net.minecraft.network.protocol.PacketType;
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import net.minecraft.world.level.ChunkPos;
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import net.minecraft.world.level.chunk.LevelChunk;
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import net.minecraft.world.level.chunk.LevelChunkSection;
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public record ClientboundChunksBiomesPacket(List<ClientboundChunksBiomesPacket.ChunkBiomeData> chunkBiomeData) implements Packet<ClientGamePacketListener> {
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public static final StreamCodec<FriendlyByteBuf, ClientboundChunksBiomesPacket> STREAM_CODEC = Packet.codec(
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ClientboundChunksBiomesPacket::write, ClientboundChunksBiomesPacket::new
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);
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private static final int TWO_MEGABYTES = 2097152;
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private ClientboundChunksBiomesPacket(FriendlyByteBuf buffer) {
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this(buffer.readList(ClientboundChunksBiomesPacket.ChunkBiomeData::new));
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}
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public static ClientboundChunksBiomesPacket forChunks(List<LevelChunk> chunks) {
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return new ClientboundChunksBiomesPacket(chunks.stream().map(ClientboundChunksBiomesPacket.ChunkBiomeData::new).toList());
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}
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private void write(FriendlyByteBuf buffer) {
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buffer.writeCollection(this.chunkBiomeData, (friendlyByteBuf, chunkBiomeData) -> chunkBiomeData.write(friendlyByteBuf));
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}
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@Override
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public PacketType<ClientboundChunksBiomesPacket> type() {
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return GamePacketTypes.CLIENTBOUND_CHUNKS_BIOMES;
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}
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/**
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* Passes this Packet on to the PacketListener for processing.
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*/
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public void handle(ClientGamePacketListener handler) {
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handler.handleChunksBiomes(this);
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}
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public record ChunkBiomeData(ChunkPos pos, byte[] buffer) {
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public ChunkBiomeData(LevelChunk chunk) {
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this(chunk.getPos(), new byte[calculateChunkSize(chunk)]);
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extractChunkData(new FriendlyByteBuf(this.getWriteBuffer()), chunk);
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}
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public ChunkBiomeData(FriendlyByteBuf buffer) {
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this(buffer.readChunkPos(), buffer.readByteArray(2097152));
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}
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private static int calculateChunkSize(LevelChunk chunk) {
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int i = 0;
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for (LevelChunkSection levelChunkSection : chunk.getSections()) {
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i += levelChunkSection.getBiomes().getSerializedSize();
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}
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return i;
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}
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public FriendlyByteBuf getReadBuffer() {
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return new FriendlyByteBuf(Unpooled.wrappedBuffer(this.buffer));
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}
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private ByteBuf getWriteBuffer() {
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ByteBuf byteBuf = Unpooled.wrappedBuffer(this.buffer);
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byteBuf.writerIndex(0);
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return byteBuf;
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}
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public static void extractChunkData(FriendlyByteBuf buffer, LevelChunk chunk) {
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for (LevelChunkSection levelChunkSection : chunk.getSections()) {
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levelChunkSection.getBiomes().write(buffer);
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}
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if (buffer.writerIndex() != buffer.capacity()) {
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throw new IllegalStateException("Didn't fill biome buffer: expected " + buffer.capacity() + " bytes, got " + buffer.writerIndex());
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}
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}
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public void write(FriendlyByteBuf buffer) {
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buffer.writeChunkPos(this.pos);
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buffer.writeByteArray(this.buffer);
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}
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}
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}
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