568 lines
17 KiB
C++
568 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 "../ByteBuffer.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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////////////////////////////////////////////////////////////////////////////////
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// cChunkDataSerializer:
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cChunkDataSerializer::cChunkDataSerializer(
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const cChunkData & a_Data,
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const unsigned char * a_BiomeData,
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const eDimension a_Dimension
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):
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m_Data(a_Data),
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m_BiomeData(a_BiomeData),
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m_Dimension(a_Dimension)
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{
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}
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const AString & cChunkDataSerializer::Serialize(int a_Version, int a_ChunkX, int a_ChunkZ, const std::map<UInt32, UInt32> & a_BlockTypeMap)
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{
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Serializations::const_iterator itr = m_Serializations.find(a_Version);
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if (itr != m_Serializations.end())
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{
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return itr->second;
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}
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AString data;
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switch (a_Version)
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{
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case RELEASE_1_8_0: Serialize47 (data, a_ChunkX, a_ChunkZ); break;
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case RELEASE_1_9_0: Serialize107(data, a_ChunkX, a_ChunkZ); break;
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case RELEASE_1_9_4: Serialize110(data, a_ChunkX, a_ChunkZ); break;
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case RELEASE_1_13: Serialize393(data, a_ChunkX, a_ChunkZ, a_BlockTypeMap); break;
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default:
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{
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LOGERROR("cChunkDataSerializer::Serialize(): Unknown version: %d", a_Version);
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ASSERT(!"Unknown chunk data serialization version");
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break;
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}
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}
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if (!data.empty())
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{
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m_Serializations[a_Version] = data;
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}
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return m_Serializations[a_Version];
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}
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void cChunkDataSerializer::Serialize47(AString & a_Data, int a_ChunkX, int a_ChunkZ)
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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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cByteBuffer Packet(512 KiB);
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Packet.WriteVarInt32(0x21); // Packet id (Chunk Data packet)
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Packet.WriteBEInt32(a_ChunkX);
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Packet.WriteBEInt32(a_ChunkZ);
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Packet.WriteBool(true); // "Ground-up continuous", or rather, "biome data present" flag
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Packet.WriteBEUInt16(m_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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m_Data.NumPresentSections() * cChunkData::SectionBlockCount * 3 + // Blocks and lighting
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BiomeDataSize // Biome data
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);
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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(m_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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Packet.WriteBEUInt8(static_cast<unsigned char>(BlockType << 4) | BlockMeta);
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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(m_Data, [&](const cChunkData::sChunkSection & a_Section)
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{
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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(m_Data, [&](const cChunkData::sChunkSection & a_Section)
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{
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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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Packet.WriteBuf(m_BiomeData, BiomeDataSize);
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AString PacketData;
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Packet.ReadAll(PacketData);
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Packet.CommitRead();
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cByteBuffer Buffer(20);
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if (PacketData.size() >= 256)
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{
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if (!cProtocol_1_8_0::CompressPacket(PacketData, a_Data))
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{
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ASSERT(!"Packet compression failed.");
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a_Data.clear();
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return;
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}
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}
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else
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{
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AString PostData;
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Buffer.WriteVarInt32(static_cast<UInt32>(Packet.GetUsedSpace() + 1));
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Buffer.WriteVarInt32(0);
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Buffer.ReadAll(PostData);
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Buffer.CommitRead();
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a_Data.clear();
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a_Data.reserve(PostData.size() + PacketData.size());
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a_Data.append(PostData.data(), PostData.size());
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a_Data.append(PacketData.data(), PacketData.size());
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}
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}
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void cChunkDataSerializer::Serialize107(AString & a_Data, int a_ChunkX, int a_ChunkZ)
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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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cByteBuffer Packet(512 KiB);
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Packet.WriteVarInt32(0x20); // Packet id (Chunk Data packet)
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Packet.WriteBEInt32(a_ChunkX);
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Packet.WriteBEInt32(a_ChunkZ);
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Packet.WriteBool(true); // "Ground-up continuous", or rather, "biome data present" flag
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Packet.WriteVarInt32(m_Data.GetSectionBitmask());
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// Write the chunk size:
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const size_t BitsPerEntry = 13;
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const size_t Mask = (1 << BitsPerEntry) - 1; // Creates a mask that is 13 bits long, ie 0b1111111111111
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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 * m_Data.NumPresentSections() +
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BiomeDataSize
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);
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Packet.WriteVarInt32(static_cast<UInt32>(ChunkSize));
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// Write each chunk section...
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ForEachSection(m_Data, [&](const cChunkData::sChunkSection & a_Section)
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{
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Packet.WriteBEUInt8(static_cast<UInt8>(BitsPerEntry));
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Packet.WriteVarInt32(0); // Palette length is 0
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Packet.WriteVarInt32(static_cast<UInt32>(ChunkSectionDataArraySize));
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UInt64 TempLong = 0; // Temporary value that will be stored into
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UInt64 CurrentlyWrittenIndex = 0; // "Index" of the long that would be written to
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for (size_t Index = 0; Index < cChunkData::SectionBlockCount; Index++)
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{
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UInt64 Value = static_cast<UInt64>(a_Section.m_BlockTypes[Index] << 4);
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if (Index % 2 == 0)
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{
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Value |= a_Section.m_BlockMetas[Index / 2] & 0x0f;
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}
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else
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{
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Value |= a_Section.m_BlockMetas[Index / 2] >> 4;
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}
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Value &= Mask; // It shouldn't go out of bounds, but it's still worth being careful
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// Painful part where we write data into the long array. Based off of the normal code.
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size_t BitPosition = Index * BitsPerEntry;
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size_t FirstIndex = BitPosition / 64;
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size_t SecondIndex = ((Index + 1) * BitsPerEntry - 1) / 64;
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size_t BitOffset = BitPosition % 64;
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if (FirstIndex != CurrentlyWrittenIndex)
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{
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// Write the current data before modifiying it.
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Packet.WriteBEUInt64(TempLong);
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TempLong = 0;
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CurrentlyWrittenIndex = FirstIndex;
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}
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TempLong |= (Value << BitOffset);
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if (FirstIndex != SecondIndex)
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{
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// Part of the data is now in the second long; write the first one first
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Packet.WriteBEUInt64(TempLong);
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CurrentlyWrittenIndex = SecondIndex;
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TempLong = (Value >> (64 - BitOffset));
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}
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}
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// The last long will generally not be written
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Packet.WriteBEUInt64(TempLong);
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// Write lighting:
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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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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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Packet.WriteBuf(m_BiomeData, BiomeDataSize);
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AString PacketData;
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Packet.ReadAll(PacketData);
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Packet.CommitRead();
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cByteBuffer Buffer(20);
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if (PacketData.size() >= 256)
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{
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if (!cProtocol_1_9_0::CompressPacket(PacketData, a_Data))
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{
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ASSERT(!"Packet compression failed.");
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a_Data.clear();
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return;
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}
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}
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else
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{
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AString PostData;
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Buffer.WriteVarInt32(static_cast<UInt32>(Packet.GetUsedSpace() + 1));
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Buffer.WriteVarInt32(0);
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Buffer.ReadAll(PostData);
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Buffer.CommitRead();
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a_Data.clear();
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a_Data.reserve(PostData.size() + PacketData.size());
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a_Data.append(PostData.data(), PostData.size());
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a_Data.append(PacketData.data(), PacketData.size());
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}
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}
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void cChunkDataSerializer::Serialize110(AString & a_Data, int a_ChunkX, int a_ChunkZ)
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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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cByteBuffer Packet(512 KiB);
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Packet.WriteVarInt32(0x20); // Packet id (Chunk Data packet)
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Packet.WriteBEInt32(a_ChunkX);
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Packet.WriteBEInt32(a_ChunkZ);
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Packet.WriteBool(true); // "Ground-up continuous", or rather, "biome data present" flag
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Packet.WriteVarInt32(m_Data.GetSectionBitmask());
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// Write the chunk size:
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const size_t BitsPerEntry = 13;
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const size_t Mask = (1 << BitsPerEntry) - 1; // Creates a mask that is 13 bits long, ie 0b1111111111111
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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 * m_Data.NumPresentSections() +
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BiomeDataSize
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);
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Packet.WriteVarInt32(static_cast<UInt32>(ChunkSize));
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// Write each chunk section...
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ForEachSection(m_Data, [&](const cChunkData::sChunkSection & a_Section)
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{
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Packet.WriteBEUInt8(static_cast<UInt8>(BitsPerEntry));
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Packet.WriteVarInt32(0); // Palette length is 0
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Packet.WriteVarInt32(static_cast<UInt32>(ChunkSectionDataArraySize));
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UInt64 TempLong = 0; // Temporary value that will be stored into
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UInt64 CurrentlyWrittenIndex = 0; // "Index" of the long that would be written to
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for (size_t Index = 0; Index < cChunkData::SectionBlockCount; Index++)
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{
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UInt64 Value = static_cast<UInt64>(a_Section.m_BlockTypes[Index] << 4);
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if (Index % 2 == 0)
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{
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Value |= a_Section.m_BlockMetas[Index / 2] & 0x0f;
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}
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else
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{
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Value |= a_Section.m_BlockMetas[Index / 2] >> 4;
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}
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Value &= Mask; // It shouldn't go out of bounds, but it's still worth being careful
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// Painful part where we write data into the long array. Based off of the normal code.
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size_t BitPosition = Index * BitsPerEntry;
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size_t FirstIndex = BitPosition / 64;
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size_t SecondIndex = ((Index + 1) * BitsPerEntry - 1) / 64;
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size_t BitOffset = BitPosition % 64;
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if (FirstIndex != CurrentlyWrittenIndex)
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{
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// Write the current data before modifiying it.
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Packet.WriteBEUInt64(TempLong);
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TempLong = 0;
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CurrentlyWrittenIndex = FirstIndex;
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}
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TempLong |= (Value << BitOffset);
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if (FirstIndex != SecondIndex)
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{
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// Part of the data is now in the second long; write the first one first
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Packet.WriteBEUInt64(TempLong);
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CurrentlyWrittenIndex = SecondIndex;
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TempLong = (Value >> (64 - BitOffset));
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}
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}
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// The last long will generally not be written
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Packet.WriteBEUInt64(TempLong);
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// Write lighting:
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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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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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Packet.WriteBuf(m_BiomeData, BiomeDataSize);
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// Identify 1.9.4's tile entity list as empty
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Packet.WriteBEUInt8(0);
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AString PacketData;
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Packet.ReadAll(PacketData);
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Packet.CommitRead();
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cByteBuffer Buffer(20);
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if (PacketData.size() >= 256)
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{
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if (!cProtocol_1_9_0::CompressPacket(PacketData, a_Data))
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{
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ASSERT(!"Packet compression failed.");
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a_Data.clear();
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return;
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}
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}
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else
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{
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AString PostData;
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Buffer.WriteVarInt32(static_cast<UInt32>(Packet.GetUsedSpace() + 1));
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Buffer.WriteVarInt32(0);
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Buffer.ReadAll(PostData);
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Buffer.CommitRead();
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a_Data.clear();
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a_Data.reserve(PostData.size() + PacketData.size());
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a_Data.append(PostData.data(), PostData.size());
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a_Data.append(PacketData.data(), PacketData.size());
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}
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}
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void cChunkDataSerializer::Serialize393(AString & a_Data, int a_ChunkX, int a_ChunkZ, const std::map<UInt32, UInt32> & a_BlockTypeMap)
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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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ASSERT(!a_BlockTypeMap.empty()); // We need a protocol-specific translation map
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// Create the packet:
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cByteBuffer Packet(512 KiB);
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Packet.WriteVarInt32(0x22); // Packet id (Chunk Data packet)
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Packet.WriteBEInt32(a_ChunkX);
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Packet.WriteBEInt32(a_ChunkZ);
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Packet.WriteBool(true); // "Ground-up continuous", or rather, "biome data present" flag
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Packet.WriteVarInt32(m_Data.GetSectionBitmask());
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// Write the chunk size in bytes:
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const size_t BitsPerEntry = 14;
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const size_t Mask = (1 << BitsPerEntry) - 1;
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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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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 * m_Data.NumPresentSections() +
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BiomeDataSize * 4 // Biome data now BE ints
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);
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Packet.WriteVarInt32(static_cast<UInt32>(ChunkSize));
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// Write each chunk section...
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ForEachSection(m_Data, [&](const cChunkData::sChunkSection & a_Section)
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{
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Packet.WriteBEUInt8(static_cast<UInt8>(BitsPerEntry));
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Packet.WriteVarInt32(static_cast<UInt32>(ChunkSectionDataArraySize));
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UInt64 TempLong = 0; // Temporary value that will be stored into
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UInt64 CurrentlyWrittenIndex = 0; // "Index" of the long that would be written to
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for (size_t Index = 0; Index < cChunkData::SectionBlockCount; Index++)
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{
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UInt32 blockType = a_Section.m_BlockTypes[Index];
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UInt32 blockMeta = (a_Section.m_BlockMetas[Index / 2] >> ((Index % 2) * 4)) & 0x0f;
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auto itr = a_BlockTypeMap.find(blockType * 16 | blockMeta);
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UInt64 Value = (itr == a_BlockTypeMap.end()) ? 0 :itr->second;
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Value &= Mask; // It shouldn't go out of bounds, but it's still worth being careful
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// Painful part where we write data into the long array. Based off of the normal code.
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size_t BitPosition = Index * BitsPerEntry;
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size_t FirstIndex = BitPosition / 64;
|
|
size_t SecondIndex = ((Index + 1) * BitsPerEntry - 1) / 64;
|
|
size_t BitOffset = BitPosition % 64;
|
|
|
|
if (FirstIndex != CurrentlyWrittenIndex)
|
|
{
|
|
// Write the current data before modifiying it.
|
|
Packet.WriteBEUInt64(TempLong);
|
|
TempLong = 0;
|
|
CurrentlyWrittenIndex = FirstIndex;
|
|
}
|
|
|
|
TempLong |= (Value << BitOffset);
|
|
|
|
if (FirstIndex != SecondIndex)
|
|
{
|
|
// Part of the data is now in the second long; write the first one first
|
|
Packet.WriteBEUInt64(TempLong);
|
|
CurrentlyWrittenIndex = SecondIndex;
|
|
|
|
TempLong = (Value >> (64 - BitOffset));
|
|
}
|
|
}
|
|
// The last long will generally not be written
|
|
Packet.WriteBEUInt64(TempLong);
|
|
|
|
// Write lighting:
|
|
Packet.WriteBuf(a_Section.m_BlockLight, sizeof(a_Section.m_BlockLight));
|
|
if (m_Dimension == dimOverworld)
|
|
{
|
|
// Skylight is only sent in the overworld; the nether and end do not use it
|
|
Packet.WriteBuf(a_Section.m_BlockSkyLight, sizeof(a_Section.m_BlockSkyLight));
|
|
}
|
|
}
|
|
);
|
|
|
|
// Write the biome data
|
|
for (size_t i = 0; i != BiomeDataSize; i++)
|
|
{
|
|
Packet.WriteBEUInt32(static_cast<UInt32>(m_BiomeData[i]) & 0xff);
|
|
}
|
|
|
|
// Identify 1.9.4's tile entity list as empty
|
|
Packet.WriteVarInt32(0);
|
|
|
|
AString PacketData;
|
|
Packet.ReadAll(PacketData);
|
|
Packet.CommitRead();
|
|
|
|
if (PacketData.size() >= 256)
|
|
{
|
|
if (!cProtocol_1_9_0::CompressPacket(PacketData, a_Data))
|
|
{
|
|
ASSERT(!"Packet compression failed.");
|
|
a_Data.clear();
|
|
return;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
cByteBuffer Buffer(20);
|
|
AString PostData;
|
|
|
|
Buffer.WriteVarInt32(static_cast<UInt32>(Packet.GetUsedSpace() + 1));
|
|
Buffer.WriteVarInt32(0);
|
|
Buffer.ReadAll(PostData);
|
|
Buffer.CommitRead();
|
|
|
|
a_Data.clear();
|
|
a_Data.reserve(PostData.size() + PacketData.size());
|
|
a_Data.append(PostData.data(), PostData.size());
|
|
a_Data.append(PacketData.data(), PacketData.size());
|
|
}
|
|
}
|