593 lines
19 KiB
C++
593 lines
19 KiB
C++
#include "Globals.h"
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#include "ChunkDataSerializer.h"
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#include "Protocol_1_8.h"
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#include "Protocol_1_9.h"
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#include "../ClientHandle.h"
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#include "../WorldStorage/FastNBT.h"
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#include "Palettes/Upgrade.h"
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#include "Palettes/Palette_1_13.h"
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#include "Palettes/Palette_1_13_1.h"
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#include "Palettes/Palette_1_14.h"
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namespace
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{
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std::pair<UInt16, size_t> GetSectionBitmask(const ChunkBlockData & a_BlockData, const ChunkLightData & a_LightData)
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{
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size_t Present = 0;
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UInt16 Mask = 0;
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ChunkDef_ForEachSection(a_BlockData, a_LightData,
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{
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Present++;
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Mask |= (1 << Y);
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});
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return { Mask, Present };
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}
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auto PaletteLegacy(const BLOCKTYPE a_BlockType, const NIBBLETYPE a_Meta)
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{
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return (a_BlockType << 4) | a_Meta;
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}
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auto Palette393(const BLOCKTYPE a_BlockType, const NIBBLETYPE a_Meta)
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{
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return Palette_1_13::From(PaletteUpgrade::FromBlock(a_BlockType, a_Meta));
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}
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auto Palette401(const BLOCKTYPE a_BlockType, const NIBBLETYPE a_Meta)
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{
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return Palette_1_13_1::From(PaletteUpgrade::FromBlock(a_BlockType, a_Meta));
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}
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auto Palette477(const BLOCKTYPE a_BlockType, const NIBBLETYPE a_Meta)
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{
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return Palette_1_14::From(PaletteUpgrade::FromBlock(a_BlockType, a_Meta));
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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// cChunkDataSerializer:
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cChunkDataSerializer::cChunkDataSerializer(const eDimension a_Dimension) :
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m_Packet(512 KiB),
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m_Dimension(a_Dimension)
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{
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}
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void cChunkDataSerializer::SendToClients(const int a_ChunkX, const int a_ChunkZ, const ChunkBlockData & a_BlockData, const ChunkLightData & a_LightData, const unsigned char * a_BiomeMap, const ClientHandles & a_SendTo)
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{
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for (const auto & Client : a_SendTo)
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{
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switch (static_cast<cProtocol::Version>(Client->GetProtocolVersion()))
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{
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case cProtocol::Version::v1_8_0:
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{
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Serialize(Client, a_ChunkX, a_ChunkZ, a_BlockData, a_LightData, a_BiomeMap, CacheVersion::v47);
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continue;
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}
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case cProtocol::Version::v1_9_0:
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case cProtocol::Version::v1_9_1:
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case cProtocol::Version::v1_9_2:
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{
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Serialize(Client, a_ChunkX, a_ChunkZ, a_BlockData, a_LightData, a_BiomeMap, CacheVersion::v107);
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continue;
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}
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case cProtocol::Version::v1_9_4:
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case cProtocol::Version::v1_10_0:
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case cProtocol::Version::v1_11_0:
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case cProtocol::Version::v1_11_1:
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case cProtocol::Version::v1_12:
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case cProtocol::Version::v1_12_1:
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case cProtocol::Version::v1_12_2:
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{
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Serialize(Client, a_ChunkX, a_ChunkZ, a_BlockData, a_LightData, a_BiomeMap, CacheVersion::v110);
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continue;
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}
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case cProtocol::Version::v1_13:
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{
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Serialize(Client, a_ChunkX, a_ChunkZ, a_BlockData, a_LightData, a_BiomeMap, CacheVersion::v393); // This version didn't last very long xD
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continue;
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}
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case cProtocol::Version::v1_13_1:
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case cProtocol::Version::v1_13_2:
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{
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Serialize(Client, a_ChunkX, a_ChunkZ, a_BlockData, a_LightData, a_BiomeMap, CacheVersion::v401);
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continue;
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}
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case cProtocol::Version::v1_14:
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{
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Serialize(Client, a_ChunkX, a_ChunkZ, a_BlockData, a_LightData, a_BiomeMap, CacheVersion::v477);
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continue;
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}
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}
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UNREACHABLE("Unknown chunk data serialization version");
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}
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// Our cache is only persistent during the function call:
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for (auto & Cache : m_Cache)
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{
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Cache.Engaged = false;
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}
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}
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inline void cChunkDataSerializer::Serialize(const ClientHandles::value_type & a_Client, const int a_ChunkX, const int a_ChunkZ, const ChunkBlockData & a_BlockData, const ChunkLightData & a_LightData, const unsigned char * a_BiomeMap, const CacheVersion a_CacheVersion)
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{
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auto & Cache = m_Cache[static_cast<size_t>(a_CacheVersion)];
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if (Cache.Engaged)
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{
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// Success! We've done it already, just re-use:
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a_Client->SendChunkData(a_ChunkX, a_ChunkZ, Cache.ToSend);
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return;
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}
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switch (a_CacheVersion)
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{
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case CacheVersion::v47:
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{
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Serialize47(a_ChunkX, a_ChunkZ, a_BlockData, a_LightData, a_BiomeMap);
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break;
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}
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case CacheVersion::v107:
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{
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Serialize107(a_ChunkX, a_ChunkZ, a_BlockData, a_LightData, a_BiomeMap);
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break;
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}
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case CacheVersion::v110:
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{
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Serialize110(a_ChunkX, a_ChunkZ, a_BlockData, a_LightData, a_BiomeMap);
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break;
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}
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case CacheVersion::v393:
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{
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Serialize393<&Palette393>(a_ChunkX, a_ChunkZ, a_BlockData, a_LightData, a_BiomeMap);
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break;
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}
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case CacheVersion::v401:
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{
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Serialize393<&Palette401>(a_ChunkX, a_ChunkZ, a_BlockData, a_LightData, a_BiomeMap);
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break;
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}
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case CacheVersion::v477:
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{
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Serialize477(a_ChunkX, a_ChunkZ, a_BlockData, a_LightData, a_BiomeMap);
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break;
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}
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}
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CompressPacketInto(Cache);
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ASSERT(Cache.Engaged); // Cache must be populated now
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a_Client->SendChunkData(a_ChunkX, a_ChunkZ, Cache.ToSend);
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}
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inline void cChunkDataSerializer::Serialize47(const int a_ChunkX, const int a_ChunkZ, const ChunkBlockData & a_BlockData, const ChunkLightData & a_LightData, const unsigned char * a_BiomeMap)
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{
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// This function returns the fully compressed packet (including packet size), not the raw packet!
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const auto Bitmask = GetSectionBitmask(a_BlockData, a_LightData);
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// Create the packet:
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m_Packet.WriteVarInt32(0x21); // Packet id (Chunk Data packet)
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m_Packet.WriteBEInt32(a_ChunkX);
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m_Packet.WriteBEInt32(a_ChunkZ);
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m_Packet.WriteBool(true); // "Ground-up continuous", or rather, "biome data present" flag
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m_Packet.WriteBEUInt16(Bitmask.first);
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// Write the chunk size:
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const int BiomeDataSize = cChunkDef::Width * cChunkDef::Width;
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const size_t ChunkSize = (
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Bitmask.second * (ChunkBlockData::SectionBlockCount * 2 + ChunkLightData::SectionLightCount * 2) + // Blocks and lighting
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BiomeDataSize // Biome data
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);
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m_Packet.WriteVarInt32(static_cast<UInt32>(ChunkSize));
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// Chunk written as seperate arrays of (blocktype + meta), blocklight and skylight
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// each array stores all present sections of the same kind packed together
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// Write the block types to the packet:
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ChunkDef_ForEachSection(a_BlockData, a_LightData,
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{
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const bool BlocksExist = Blocks != nullptr;
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const bool MetasExist = Metas != nullptr;
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for (size_t BlockIdx = 0; BlockIdx != ChunkBlockData::SectionBlockCount; ++BlockIdx)
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{
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BLOCKTYPE BlockType = BlocksExist ? (*Blocks)[BlockIdx] : 0;
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NIBBLETYPE BlockMeta = MetasExist ? cChunkDef::ExpandNibble(Metas->data(), BlockIdx) : 0;
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m_Packet.WriteBEUInt8(static_cast<unsigned char>(BlockType << 4) | BlockMeta);
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m_Packet.WriteBEUInt8(static_cast<unsigned char>(BlockType >> 4));
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}
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});
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// Write the block lights:
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ChunkDef_ForEachSection(a_BlockData, a_LightData,
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{
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if (BlockLights == nullptr)
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{
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m_Packet.WriteBuf(ChunkLightData::SectionLightCount, ChunkLightData::DefaultBlockLightValue);
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}
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else
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{
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m_Packet.WriteBuf(BlockLights->data(), BlockLights->size());
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}
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});
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// Write the sky lights:
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ChunkDef_ForEachSection(a_BlockData, a_LightData,
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{
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if (SkyLights == nullptr)
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{
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m_Packet.WriteBuf(ChunkLightData::SectionLightCount, ChunkLightData::DefaultSkyLightValue);
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}
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else
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{
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m_Packet.WriteBuf(SkyLights->data(), SkyLights->size());
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}
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});
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// Write the biome data:
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m_Packet.WriteBuf(a_BiomeMap, BiomeDataSize);
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}
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inline void cChunkDataSerializer::Serialize107(const int a_ChunkX, const int a_ChunkZ, const ChunkBlockData & a_BlockData, const ChunkLightData & a_LightData, const unsigned char * a_BiomeMap)
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{
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// This function returns the fully compressed packet (including packet size), not the raw packet!
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// Below variables tagged static because of https://developercommunity.visualstudio.com/content/problem/367326
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static constexpr UInt8 BitsPerEntry = 13;
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static constexpr size_t ChunkSectionDataArraySize = (ChunkBlockData::SectionBlockCount * BitsPerEntry) / 8 / 8; // Convert from bit count to long count
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const auto Bitmask = GetSectionBitmask(a_BlockData, a_LightData);
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// Create the packet:
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m_Packet.WriteVarInt32(0x20); // Packet id (Chunk Data packet)
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m_Packet.WriteBEInt32(a_ChunkX);
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m_Packet.WriteBEInt32(a_ChunkZ);
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m_Packet.WriteBool(true); // "Ground-up continuous", or rather, "biome data present" flag
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m_Packet.WriteVarInt32(Bitmask.first);
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size_t ChunkSectionSize = (
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1 + // Bits per block - set to 13, so the global palette is used and the palette has a length of 0
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1 + // Palette length
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2 + // Data array length VarInt - 2 bytes for the current value
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ChunkSectionDataArraySize * 8 + // Actual block data - multiplied by 8 because first number is longs
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ChunkLightData::SectionLightCount // Block light
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);
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if (m_Dimension == dimOverworld)
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{
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// Sky light is only sent in the overworld.
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ChunkSectionSize += ChunkLightData::SectionLightCount;
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}
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const size_t BiomeDataSize = cChunkDef::Width * cChunkDef::Width;
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const size_t ChunkSize = (
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ChunkSectionSize * Bitmask.second +
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BiomeDataSize
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);
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// Write the chunk size:
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m_Packet.WriteVarInt32(static_cast<UInt32>(ChunkSize));
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// Write each chunk section...
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ChunkDef_ForEachSection(a_BlockData, a_LightData,
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{
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m_Packet.WriteBEUInt8(BitsPerEntry);
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m_Packet.WriteVarInt32(0); // Palette length is 0
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m_Packet.WriteVarInt32(static_cast<UInt32>(ChunkSectionDataArraySize));
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WriteBlockSectionSeamless<&PaletteLegacy>(Blocks, Metas, BitsPerEntry);
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WriteLightSectionGrouped(BlockLights, SkyLights);
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});
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// Write the biome data
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m_Packet.WriteBuf(a_BiomeMap, BiomeDataSize);
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}
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inline void cChunkDataSerializer::Serialize110(const int a_ChunkX, const int a_ChunkZ, const ChunkBlockData & a_BlockData, const ChunkLightData & a_LightData, const unsigned char * a_BiomeMap)
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{
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// This function returns the fully compressed packet (including packet size), not the raw packet!
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// Below variables tagged static because of https://developercommunity.visualstudio.com/content/problem/367326
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static constexpr UInt8 BitsPerEntry = 13;
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static constexpr size_t ChunkSectionDataArraySize = (ChunkBlockData::SectionBlockCount * BitsPerEntry) / 8 / 8; // Convert from bit count to long count
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const auto Bitmask = GetSectionBitmask(a_BlockData, a_LightData);
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// Create the packet:
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m_Packet.WriteVarInt32(0x20); // Packet id (Chunk Data packet)
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m_Packet.WriteBEInt32(a_ChunkX);
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m_Packet.WriteBEInt32(a_ChunkZ);
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m_Packet.WriteBool(true); // "Ground-up continuous", or rather, "biome data present" flag
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m_Packet.WriteVarInt32(Bitmask.first);
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size_t ChunkSectionSize = (
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1 + // Bits per block - set to 13, so the global palette is used and the palette has a length of 0
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1 + // Palette length
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2 + // Data array length VarInt - 2 bytes for the current value
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ChunkSectionDataArraySize * 8 + // Actual block data - multiplied by 8 because first number is longs
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ChunkLightData::SectionLightCount // Block light
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);
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if (m_Dimension == dimOverworld)
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{
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// Sky light is only sent in the overworld.
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ChunkSectionSize += ChunkLightData::SectionLightCount;
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}
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const size_t BiomeDataSize = cChunkDef::Width * cChunkDef::Width;
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const size_t ChunkSize = (
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ChunkSectionSize * Bitmask.second +
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BiomeDataSize
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);
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// Write the chunk size:
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m_Packet.WriteVarInt32(static_cast<UInt32>(ChunkSize));
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// Write each chunk section...
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ChunkDef_ForEachSection(a_BlockData, a_LightData,
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{
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m_Packet.WriteBEUInt8(BitsPerEntry);
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m_Packet.WriteVarInt32(0); // Palette length is 0
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m_Packet.WriteVarInt32(static_cast<UInt32>(ChunkSectionDataArraySize));
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WriteBlockSectionSeamless<&PaletteLegacy>(Blocks, Metas, BitsPerEntry);
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WriteLightSectionGrouped(BlockLights, SkyLights);
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});
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// Write the biome data
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m_Packet.WriteBuf(a_BiomeMap, BiomeDataSize);
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// Identify 1.9.4's tile entity list as empty
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m_Packet.WriteBEUInt8(0);
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}
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template <auto Palette>
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inline void cChunkDataSerializer::Serialize393(const int a_ChunkX, const int a_ChunkZ, const ChunkBlockData & a_BlockData, const ChunkLightData & a_LightData, const unsigned char * a_BiomeMap)
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{
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// This function returns the fully compressed packet (including packet size), not the raw packet!
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// Below variables tagged static because of https://developercommunity.visualstudio.com/content/problem/367326
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static constexpr UInt8 BitsPerEntry = 14;
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static constexpr size_t ChunkSectionDataArraySize = (ChunkBlockData::SectionBlockCount * BitsPerEntry) / 8 / 8;
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const auto Bitmask = GetSectionBitmask(a_BlockData, a_LightData);
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// Create the packet:
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m_Packet.WriteVarInt32(0x22); // Packet id (Chunk Data packet)
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m_Packet.WriteBEInt32(a_ChunkX);
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m_Packet.WriteBEInt32(a_ChunkZ);
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m_Packet.WriteBool(true); // "Ground-up continuous", or rather, "biome data present" flag
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m_Packet.WriteVarInt32(Bitmask.first);
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size_t ChunkSectionSize = (
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1 + // Bits per entry, BEUInt8, 1 byte
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m_Packet.GetVarIntSize(static_cast<UInt32>(ChunkSectionDataArraySize)) + // Field containing "size of whole section", VarInt32, variable size
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ChunkSectionDataArraySize * 8 + // Actual section data, lots of bytes (multiplier 1 long = 8 bytes)
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ChunkLightData::SectionLightCount // Size of blocklight which is always sent
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);
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if (m_Dimension == dimOverworld)
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{
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// Sky light is only sent in the overworld.
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ChunkSectionSize += ChunkLightData::SectionLightCount;
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}
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const size_t BiomeDataSize = cChunkDef::Width * cChunkDef::Width;
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const size_t ChunkSize = (
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ChunkSectionSize * Bitmask.second +
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BiomeDataSize * 4 // Biome data now BE ints
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);
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// Write the chunk size in bytes:
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m_Packet.WriteVarInt32(static_cast<UInt32>(ChunkSize));
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// Write each chunk section...
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ChunkDef_ForEachSection(a_BlockData, a_LightData,
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{
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m_Packet.WriteBEUInt8(BitsPerEntry);
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m_Packet.WriteVarInt32(static_cast<UInt32>(ChunkSectionDataArraySize));
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WriteBlockSectionSeamless<Palette>(Blocks, Metas, BitsPerEntry);
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WriteLightSectionGrouped(BlockLights, SkyLights);
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});
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// Write the biome data
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for (size_t i = 0; i != BiomeDataSize; i++)
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{
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m_Packet.WriteBEUInt32(static_cast<UInt32>(a_BiomeMap[i]));
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}
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// Identify 1.9.4's tile entity list as empty
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m_Packet.WriteVarInt32(0);
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}
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inline void cChunkDataSerializer::Serialize477(const int a_ChunkX, const int a_ChunkZ, const ChunkBlockData & a_BlockData, const ChunkLightData & a_LightData, const unsigned char * a_BiomeMap)
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{
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// This function returns the fully compressed packet (including packet size), not the raw packet!
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// Below variables tagged static because of https://developercommunity.visualstudio.com/content/problem/367326
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static constexpr UInt8 BitsPerEntry = 14;
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static constexpr size_t ChunkSectionDataArraySize = (ChunkBlockData::SectionBlockCount * BitsPerEntry) / 8 / 8;
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const auto Bitmask = GetSectionBitmask(a_BlockData, a_LightData);
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// Create the packet:
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m_Packet.WriteVarInt32(0x21); // Packet id (Chunk Data packet)
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m_Packet.WriteBEInt32(a_ChunkX);
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m_Packet.WriteBEInt32(a_ChunkZ);
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m_Packet.WriteBool(true); // "Ground-up continuous", or rather, "biome data present" flag
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m_Packet.WriteVarInt32(Bitmask.first);
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{
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cFastNBTWriter Writer;
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// TODO: client works fine without?
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// std::array<Int64, 36> Longz = {};
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// Writer.AddLongArray("MOTION_BLOCKING", Longz.data(), Longz.size());
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Writer.Finish();
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m_Packet.Write(Writer.GetResult().data(), Writer.GetResult().size());
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}
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const size_t ChunkSectionSize = (
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2 + // Block count, BEInt16, 2 bytes
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1 + // Bits per entry, BEUInt8, 1 byte
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m_Packet.GetVarIntSize(static_cast<UInt32>(ChunkSectionDataArraySize)) + // Field containing "size of whole section", VarInt32, variable size
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ChunkSectionDataArraySize * 8 // Actual section data, lots of bytes (multiplier 1 long = 8 bytes)
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);
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const size_t BiomeDataSize = cChunkDef::Width * cChunkDef::Width;
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const size_t ChunkSize = (
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ChunkSectionSize * Bitmask.second +
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BiomeDataSize * 4 // Biome data now BE ints
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);
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|
|
|
// Write the chunk size in bytes:
|
|
m_Packet.WriteVarInt32(static_cast<UInt32>(ChunkSize));
|
|
|
|
// Write each chunk section...
|
|
ChunkDef_ForEachSection(a_BlockData, a_LightData,
|
|
{
|
|
m_Packet.WriteBEInt16(-1);
|
|
m_Packet.WriteBEUInt8(BitsPerEntry);
|
|
m_Packet.WriteVarInt32(static_cast<UInt32>(ChunkSectionDataArraySize));
|
|
WriteBlockSectionSeamless<&Palette477>(Blocks, Metas, BitsPerEntry);
|
|
});
|
|
|
|
// Write the biome data
|
|
for (size_t i = 0; i != BiomeDataSize; i++)
|
|
{
|
|
m_Packet.WriteBEUInt32(a_BiomeMap[i]);
|
|
}
|
|
|
|
// Identify 1.9.4's tile entity list as empty
|
|
m_Packet.WriteVarInt32(0);
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
template <auto Palette>
|
|
inline void cChunkDataSerializer::WriteBlockSectionSeamless(const ChunkBlockData::BlockArray * a_Blocks, const ChunkBlockData::MetaArray * a_Metas, const UInt8 a_BitsPerEntry)
|
|
{
|
|
// https://wiki.vg/Chunk_Format#Data_structure
|
|
|
|
// We shift a UInt64 by a_BitsPerEntry, the latter cannot be too big:
|
|
ASSERT(a_BitsPerEntry < 64);
|
|
|
|
UInt64 Buffer = 0; // A buffer to compose multiple smaller bitsizes into one 64-bit number
|
|
unsigned char BitIndex = 0; // The bit-position in Buffer that represents where to write next
|
|
|
|
const bool BlocksExist = a_Blocks != nullptr;
|
|
const bool MetasExist = a_Metas != nullptr;
|
|
|
|
for (size_t Index = 0; Index != ChunkBlockData::SectionBlockCount; Index++)
|
|
{
|
|
const BLOCKTYPE BlockType = BlocksExist ? (*a_Blocks)[Index] : 0;
|
|
const NIBBLETYPE BlockMeta = MetasExist ? cChunkDef::ExpandNibble(a_Metas->data(), Index) : 0;
|
|
const auto Value = Palette(BlockType, BlockMeta);
|
|
|
|
// Write as much as possible of Value, starting from BitIndex, into Buffer:
|
|
Buffer |= static_cast<UInt64>(Value) << BitIndex;
|
|
|
|
// The _signed_ count of bits in Value left to write
|
|
const auto Remaining = static_cast<char>(a_BitsPerEntry - (64 - BitIndex));
|
|
if (Remaining >= 0)
|
|
{
|
|
// There were some bits remaining: we've filled the buffer. Flush it:
|
|
m_Packet.WriteBEUInt64(Buffer);
|
|
|
|
// And write the remaining bits, setting the new BitIndex:
|
|
Buffer = static_cast<UInt64>(Value >> (a_BitsPerEntry - Remaining));
|
|
BitIndex = static_cast<unsigned char>(Remaining);
|
|
}
|
|
else
|
|
{
|
|
// It fit, excellent.
|
|
BitIndex += a_BitsPerEntry;
|
|
}
|
|
}
|
|
|
|
static_assert((ChunkBlockData::SectionBlockCount % 64) == 0, "Section must fit wholly into a 64-bit long array");
|
|
ASSERT(BitIndex == 0);
|
|
ASSERT(Buffer == 0);
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
inline void cChunkDataSerializer::WriteLightSectionGrouped(const ChunkLightData::LightArray * const a_BlockLights, const ChunkLightData::LightArray * const a_SkyLights)
|
|
{
|
|
// Write lighting:
|
|
if (a_BlockLights == nullptr)
|
|
{
|
|
m_Packet.WriteBuf(ChunkLightData::SectionLightCount, ChunkLightData::DefaultBlockLightValue);
|
|
}
|
|
else
|
|
{
|
|
m_Packet.WriteBuf(a_BlockLights->data(), a_BlockLights->size());
|
|
}
|
|
|
|
// Skylight is only sent in the overworld; the nether and end do not use it:
|
|
if (m_Dimension == dimOverworld)
|
|
{
|
|
if (a_SkyLights == nullptr)
|
|
{
|
|
m_Packet.WriteBuf(ChunkLightData::SectionLightCount, ChunkLightData::DefaultSkyLightValue);
|
|
}
|
|
else
|
|
{
|
|
m_Packet.WriteBuf(a_SkyLights->data(), a_SkyLights->size());
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
inline void cChunkDataSerializer::CompressPacketInto(ChunkDataCache & a_Cache)
|
|
{
|
|
m_Compressor.ReadFrom(m_Packet);
|
|
m_Packet.CommitRead();
|
|
|
|
cProtocol_1_8_0::CompressPacket(m_Compressor, a_Cache.ToSend);
|
|
|
|
a_Cache.Engaged = true;
|
|
}
|