557 lines
17 KiB
C++
557 lines
17 KiB
C++
#include "Globals.h"
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#include "ChunkDataSerializer.h"
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#include "zlib/zlib.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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/** Calls the given function with every present chunk section. */
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template <class Func>
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void ForEachSection(const cChunkData & a_Data, Func a_Func)
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{
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for (size_t SectionIdx = 0; SectionIdx < cChunkData::NumSections; ++SectionIdx)
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{
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auto Section = a_Data.GetSection(SectionIdx);
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if (Section != nullptr)
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{
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a_Func(*Section);
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}
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}
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}
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namespace
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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 cChunkData & a_Data, const unsigned char * a_BiomeData, 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_Data, a_BiomeData, 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_Data, a_BiomeData, 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_Data, a_BiomeData, 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_Data, a_BiomeData, 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_Data, a_BiomeData, 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_Data, a_BiomeData, 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(cClientHandle * a_Client, const int a_ChunkX, const int a_ChunkZ, const cChunkData & a_Data, const unsigned char * a_BiomeData, 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_Data, a_BiomeData);
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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_Data, a_BiomeData);
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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_Data, a_BiomeData);
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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_Data, a_BiomeData);
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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_Data, a_BiomeData);
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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_Data, a_BiomeData);
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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 cChunkData & a_Data, const unsigned char * a_BiomeData)
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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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// 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(a_Data.GetSectionBitmask());
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// Write the chunk size:
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const int BiomeDataSize = cChunkDef::Width * cChunkDef::Width;
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UInt32 ChunkSize = (
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a_Data.NumPresentSections() * cChunkData::SectionBlockCount * 3 + // Blocks and lighting
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BiomeDataSize // Biome data
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);
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m_Packet.WriteVarInt32(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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ForEachSection(a_Data, [&](const cChunkData::sChunkSection & a_Section)
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{
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for (size_t BlockIdx = 0; BlockIdx != cChunkData::SectionBlockCount; ++BlockIdx)
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{
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BLOCKTYPE BlockType = a_Section.m_BlockTypes[BlockIdx] & 0xFF;
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NIBBLETYPE BlockMeta = a_Section.m_BlockMetas[BlockIdx / 2] >> ((BlockIdx & 1) * 4) & 0x0f;
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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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);
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// Write the block lights:
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ForEachSection(a_Data, [&](const cChunkData::sChunkSection & a_Section)
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{
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m_Packet.WriteBuf(a_Section.m_BlockLight, sizeof(a_Section.m_BlockLight));
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}
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);
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// Write the sky lights:
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ForEachSection(a_Data, [&](const cChunkData::sChunkSection & a_Section)
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{
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m_Packet.WriteBuf(a_Section.m_BlockSkyLight, sizeof(a_Section.m_BlockSkyLight));
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}
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);
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// Write the biome data:
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m_Packet.WriteBuf(a_BiomeData, BiomeDataSize);
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}
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inline void cChunkDataSerializer::Serialize107(const int a_ChunkX, const int a_ChunkZ, const cChunkData & a_Data, const unsigned char * a_BiomeData)
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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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// 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(a_Data.GetSectionBitmask());
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// Write the chunk size:
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const UInt8 BitsPerEntry = 13;
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const size_t ChunkSectionDataArraySize = (cChunkData::SectionBlockCount * BitsPerEntry) / 8 / 8; // Convert from bit count to long count
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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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cChunkData::SectionBlockCount / 2 // 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 += cChunkData::SectionBlockCount / 2;
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}
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const size_t BiomeDataSize = cChunkDef::Width * cChunkDef::Width;
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size_t ChunkSize = (
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ChunkSectionSize * a_Data.NumPresentSections() +
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BiomeDataSize
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);
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m_Packet.WriteVarInt32(static_cast<UInt32>(ChunkSize));
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// Write each chunk section...
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ForEachSection(a_Data, [&](const cChunkData::sChunkSection & a_Section)
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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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WriteSectionDataSeamless<&PaletteLegacy>(a_Section, BitsPerEntry);
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// Write lighting:
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m_Packet.WriteBuf(a_Section.m_BlockLight, sizeof(a_Section.m_BlockLight));
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if (m_Dimension == dimOverworld)
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{
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// Skylight is only sent in the overworld; the nether and end do not use it
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m_Packet.WriteBuf(a_Section.m_BlockSkyLight, sizeof(a_Section.m_BlockSkyLight));
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}
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}
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);
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// Write the biome data
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m_Packet.WriteBuf(a_BiomeData, BiomeDataSize);
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}
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inline void cChunkDataSerializer::Serialize110(const int a_ChunkX, const int a_ChunkZ, const cChunkData & a_Data, const unsigned char * a_BiomeData)
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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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// 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(a_Data.GetSectionBitmask());
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// Write the chunk size:
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const UInt8 BitsPerEntry = 13;
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const size_t ChunkSectionDataArraySize = (cChunkData::SectionBlockCount * BitsPerEntry) / 8 / 8; // Convert from bit count to long count
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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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cChunkData::SectionBlockCount / 2 // 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 += cChunkData::SectionBlockCount / 2;
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}
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const size_t BiomeDataSize = cChunkDef::Width * cChunkDef::Width;
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size_t ChunkSize = (
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ChunkSectionSize * a_Data.NumPresentSections() +
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BiomeDataSize
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);
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m_Packet.WriteVarInt32(static_cast<UInt32>(ChunkSize));
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// Write each chunk section...
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ForEachSection(a_Data, [&](const cChunkData::sChunkSection & a_Section)
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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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WriteSectionDataSeamless<&PaletteLegacy>(a_Section, BitsPerEntry);
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// Write lighting:
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m_Packet.WriteBuf(a_Section.m_BlockLight, sizeof(a_Section.m_BlockLight));
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if (m_Dimension == dimOverworld)
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{
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// Skylight is only sent in the overworld; the nether and end do not use it
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m_Packet.WriteBuf(a_Section.m_BlockSkyLight, sizeof(a_Section.m_BlockSkyLight));
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}
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}
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);
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// Write the biome data
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m_Packet.WriteBuf(a_BiomeData, 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 cChunkData & a_Data, const unsigned char * a_BiomeData)
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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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// 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(a_Data.GetSectionBitmask());
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// Write the chunk size in bytes:
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const UInt8 BitsPerEntry = 14;
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const size_t ChunkSectionDataArraySize = (cChunkData::SectionBlockCount * BitsPerEntry) / 8 / 8;
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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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cChunkData::SectionBlockCount / 2 // 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 += cChunkData::SectionBlockCount / 2;
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}
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const size_t BiomeDataSize = cChunkDef::Width * cChunkDef::Width;
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size_t ChunkSize = (
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ChunkSectionSize * a_Data.NumPresentSections() +
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BiomeDataSize * 4 // Biome data now BE ints
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);
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m_Packet.WriteVarInt32(static_cast<UInt32>(ChunkSize));
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// Write each chunk section...
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ForEachSection(a_Data, [&](const cChunkData::sChunkSection & a_Section)
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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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WriteSectionDataSeamless<Palette>(a_Section, BitsPerEntry);
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// Write lighting:
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m_Packet.WriteBuf(a_Section.m_BlockLight, sizeof(a_Section.m_BlockLight));
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if (m_Dimension == dimOverworld)
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{
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// Skylight is only sent in the overworld; the nether and end do not use it
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m_Packet.WriteBuf(a_Section.m_BlockSkyLight, sizeof(a_Section.m_BlockSkyLight));
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}
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}
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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_BiomeData[i]) & 0xff);
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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 cChunkData & a_Data, const unsigned char * a_BiomeData)
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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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// 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(a_Data.GetSectionBitmask());
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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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// Write the chunk size in bytes:
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const UInt8 BitsPerEntry = 14;
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const size_t ChunkSectionDataArraySize = (cChunkData::SectionBlockCount * BitsPerEntry) / 8 / 8;
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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 * a_Data.NumPresentSections() +
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BiomeDataSize * 4 // Biome data now BE ints
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);
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m_Packet.WriteVarInt32(static_cast<UInt32>(ChunkSize));
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// Write each chunk section...
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ForEachSection(a_Data, [&](const cChunkData::sChunkSection & a_Section)
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{
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m_Packet.WriteBEInt16(-1);
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m_Packet.WriteBEUInt8(BitsPerEntry);
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m_Packet.WriteVarInt32(static_cast<UInt32>(ChunkSectionDataArraySize));
|
|
WriteSectionDataSeamless<&Palette477>(a_Section, BitsPerEntry);
|
|
}
|
|
);
|
|
|
|
// Write the biome data
|
|
for (size_t i = 0; i != BiomeDataSize; i++)
|
|
{
|
|
m_Packet.WriteBEUInt32(static_cast<UInt32>(a_BiomeData[i]) & 0xff);
|
|
}
|
|
|
|
// Identify 1.9.4's tile entity list as empty
|
|
m_Packet.WriteVarInt32(0);
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
template <auto Palette>
|
|
inline void cChunkDataSerializer::WriteSectionDataSeamless(const cChunkData::sChunkSection & a_Section, 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
|
|
|
|
for (size_t Index = 0; Index != cChunkData::SectionBlockCount; Index++)
|
|
{
|
|
const BLOCKTYPE BlockType = a_Section.m_BlockTypes[Index];
|
|
const NIBBLETYPE BlockMeta = (a_Section.m_BlockMetas[Index / 2] >> ((Index % 2) * 4)) & 0x0f;
|
|
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((cChunkData::SectionBlockCount % 64) == 0, "Section must fit wholly into a 64-bit long array");
|
|
ASSERT(BitIndex == 0);
|
|
ASSERT(Buffer == 0);
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
inline void cChunkDataSerializer::CompressPacketInto(ChunkDataCache & a_Cache)
|
|
{
|
|
m_Packet.ReadAll(a_Cache.PacketData);
|
|
m_Packet.CommitRead();
|
|
|
|
if (!cProtocol_1_8_0::CompressPacket(a_Cache.PacketData, a_Cache.ToSend))
|
|
{
|
|
ASSERT(!"Packet compression failed.");
|
|
return;
|
|
}
|
|
|
|
a_Cache.Engaged = true;
|
|
}
|