flewkey/cuberite-2a
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Consolidate various Chunk serialisers under one roof

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* Merge most into WriteSectionDataSeamless
This commit is contained in:
Tiger Wang 2020-08-20 23:07:46 +01:00
parent 2d28d681c7
commit 8cca3db61b
2 changed files with 43 additions and 141 deletions
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183
src/Protocol/ChunkDataSerializer.cpp
View File

@ -34,6 +34,33 @@ void ForEachSection(const cChunkData & a_Data, Func a_Func)
namespace
{
auto PaletteLegacy(const BLOCKTYPE a_BlockType, const NIBBLETYPE a_Meta)
{
return (a_BlockType << 4) | a_Meta;
}
auto Palette393(const BLOCKTYPE a_BlockType, const NIBBLETYPE a_Meta)
{
return Palette_1_13::FromBlock(PaletteUpgrade::FromBlock(a_BlockType, a_Meta));
}
auto Palette401(const BLOCKTYPE a_BlockType, const NIBBLETYPE a_Meta)
{
return Palette_1_13_1::FromBlock(PaletteUpgrade::FromBlock(a_BlockType, a_Meta));
}
auto Palette477(const BLOCKTYPE a_BlockType, const NIBBLETYPE a_Meta)
{
return Palette_1_14::FromBlock(PaletteUpgrade::FromBlock(a_BlockType, a_Meta));
}
}
////////////////////////////////////////////////////////////////////////////////
// cChunkDataSerializer:
@ -95,13 +122,13 @@ void cChunkDataSerializer::SendToClients(const std::unordered_set<cClientHandle
}
case cProtocol::Version::v1_13:
{
Serialize393<&Palette_1_13::FromBlock>(Entry.second); // This version didn't last very long xD
Serialize393<&Palette393>(Entry.second); // This version didn't last very long xD
continue;
}
case cProtocol::Version::v1_13_1:
case cProtocol::Version::v1_13_2:
{
Serialize393<&Palette_1_13_1::FromBlock>(Entry.second);
Serialize393<&Palette401>(Entry.second);
continue;
}
case cProtocol::Version::v1_14:
@ -111,8 +138,7 @@ void cChunkDataSerializer::SendToClients(const std::unordered_set<cClientHandle
}
}
LOGERROR("cChunkDataSerializer::Serialize(): Unknown version: %d", Entry.first);
ASSERT(!"Unknown chunk data serialization version");
UNREACHABLE("Unknown chunk data serialization version");
}
}
@ -192,8 +218,7 @@ void cChunkDataSerializer::Serialize107(const std::vector<cClientHandle *> & a_S
Packet.WriteBool(true); // "Ground-up continuous", or rather, "biome data present" flag
Packet.WriteVarInt32(m_Data.GetSectionBitmask());
// Write the chunk size:
const size_t BitsPerEntry = 13;
const size_t Mask = (1 << BitsPerEntry) - 1; // Creates a mask that is 13 bits long, ie 0b1111111111111
const UInt8 BitsPerEntry = 13;
const size_t ChunkSectionDataArraySize = (cChunkData::SectionBlockCount * BitsPerEntry) / 8 / 8; // Convert from bit count to long count
size_t ChunkSectionSize = (
1 + // Bits per block - set to 13, so the global palette is used and the palette has a length of 0
@ -219,53 +244,10 @@ void cChunkDataSerializer::Serialize107(const std::vector<cClientHandle *> & a_S
// Write each chunk section...
ForEachSection(m_Data, [&](const cChunkData::sChunkSection & a_Section)
{
Packet.WriteBEUInt8(static_cast<UInt8>(BitsPerEntry));
Packet.WriteBEUInt8(BitsPerEntry);
Packet.WriteVarInt32(0); // Palette length is 0
Packet.WriteVarInt32(static_cast<UInt32>(ChunkSectionDataArraySize));
UInt64 TempLong = 0; // Temporary value that will be stored into
UInt64 CurrentlyWrittenIndex = 0; // "Index" of the long that would be written to
for (size_t Index = 0; Index < cChunkData::SectionBlockCount; Index++)
{
UInt64 Value = static_cast<UInt64>(a_Section.m_BlockTypes[Index] << 4);
if (Index % 2 == 0)
{
Value |= a_Section.m_BlockMetas[Index / 2] & 0x0f;
}
else
{
Value |= a_Section.m_BlockMetas[Index / 2] >> 4;
}
Value &= Mask; // It shouldn't go out of bounds, but it's still worth being careful
// Painful part where we write data into the long array. Based off of the normal code.
size_t BitPosition = Index * BitsPerEntry;
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);
WriteSectionDataSeamless<&PaletteLegacy>(Packet, a_Section, BitsPerEntry);
// Write lighting:
Packet.WriteBuf(a_Section.m_BlockLight, sizeof(a_Section.m_BlockLight));
@ -299,8 +281,7 @@ void cChunkDataSerializer::Serialize110(const std::vector<cClientHandle *> & a_S
Packet.WriteBool(true); // "Ground-up continuous", or rather, "biome data present" flag
Packet.WriteVarInt32(m_Data.GetSectionBitmask());
// Write the chunk size:
const size_t BitsPerEntry = 13;
const size_t Mask = (1 << BitsPerEntry) - 1; // Creates a mask that is 13 bits long, ie 0b1111111111111
const UInt8 BitsPerEntry = 13;
const size_t ChunkSectionDataArraySize = (cChunkData::SectionBlockCount * BitsPerEntry) / 8 / 8; // Convert from bit count to long count
size_t ChunkSectionSize = (
1 + // Bits per block - set to 13, so the global palette is used and the palette has a length of 0
@ -326,53 +307,10 @@ void cChunkDataSerializer::Serialize110(const std::vector<cClientHandle *> & a_S
// Write each chunk section...
ForEachSection(m_Data, [&](const cChunkData::sChunkSection & a_Section)
{
Packet.WriteBEUInt8(static_cast<UInt8>(BitsPerEntry));
Packet.WriteBEUInt8(BitsPerEntry);
Packet.WriteVarInt32(0); // Palette length is 0
Packet.WriteVarInt32(static_cast<UInt32>(ChunkSectionDataArraySize));
UInt64 TempLong = 0; // Temporary value that will be stored into
UInt64 CurrentlyWrittenIndex = 0; // "Index" of the long that would be written to
for (size_t Index = 0; Index < cChunkData::SectionBlockCount; Index++)
{
UInt64 Value = static_cast<UInt64>(a_Section.m_BlockTypes[Index] << 4);
if (Index % 2 == 0)
{
Value |= a_Section.m_BlockMetas[Index / 2] & 0x0f;
}
else
{
Value |= a_Section.m_BlockMetas[Index / 2] >> 4;
}
Value &= Mask; // It shouldn't go out of bounds, but it's still worth being careful
// Painful part where we write data into the long array. Based off of the normal code.
size_t BitPosition = Index * BitsPerEntry;
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);
WriteSectionDataSeamless<&PaletteLegacy>(Packet, a_Section, BitsPerEntry);
// Write lighting:
Packet.WriteBuf(a_Section.m_BlockLight, sizeof(a_Section.m_BlockLight));
@ -411,8 +349,7 @@ void cChunkDataSerializer::Serialize393(const std::vector<cClientHandle *> & a_S
Packet.WriteVarInt32(m_Data.GetSectionBitmask());
// Write the chunk size in bytes:
const size_t BitsPerEntry = 14;
const size_t Mask = (1 << BitsPerEntry) - 1;
const UInt8 BitsPerEntry = 14;
const size_t ChunkSectionDataArraySize = (cChunkData::SectionBlockCount * BitsPerEntry) / 8 / 8;
size_t ChunkSectionSize = (
1 + // Bits per entry, BEUInt8, 1 byte
@ -437,46 +374,9 @@ void cChunkDataSerializer::Serialize393(const std::vector<cClientHandle *> & a_S
// Write each chunk section...
ForEachSection(m_Data, [&](const cChunkData::sChunkSection & a_Section)
{
Packet.WriteBEUInt8(static_cast<UInt8>(BitsPerEntry));
Packet.WriteBEUInt8(BitsPerEntry);
Packet.WriteVarInt32(static_cast<UInt32>(ChunkSectionDataArraySize));
UInt64 TempLong = 0; // Temporary value that will be stored into
UInt64 CurrentlyWrittenIndex = 0; // "Index" of the long that would be written to
for (size_t Index = 0; Index < cChunkData::SectionBlockCount; Index++)
{
UInt32 blockType = a_Section.m_BlockTypes[Index];
UInt32 blockMeta = (a_Section.m_BlockMetas[Index / 2] >> ((Index % 2) * 4)) & 0x0f;
UInt64 Value = Palette(PaletteUpgrade::FromBlock(blockType, blockMeta));
Value &= Mask; // It shouldn't go out of bounds, but it's still worth being careful
// Painful part where we write data into the long array. Based off of the normal code.
size_t BitPosition = Index * BitsPerEntry;
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);
WriteSectionDataSeamless<Palette>(Packet, a_Section, BitsPerEntry);
// Write lighting:
Packet.WriteBuf(a_Section.m_BlockLight, sizeof(a_Section.m_BlockLight));
@ -548,7 +448,7 @@ void cChunkDataSerializer::Serialize477(const std::vector<cClientHandle *> & a_S
Packet.WriteBEInt16(-1);
Packet.WriteBEUInt8(BitsPerEntry);
Packet.WriteVarInt32(static_cast<UInt32>(ChunkSectionDataArraySize));
WriteSectionDataSeamless(Packet, a_Section, BitsPerEntry);
WriteSectionDataSeamless<&Palette477>(Packet, a_Section, BitsPerEntry);
}
);
@ -568,6 +468,7 @@ void cChunkDataSerializer::Serialize477(const std::vector<cClientHandle *> & a_S
template <auto Palette>
void cChunkDataSerializer::WriteSectionDataSeamless(cByteBuffer & a_Packet, const cChunkData::sChunkSection & a_Section, const UInt8 a_BitsPerEntry)
{
// https://wiki.vg/Chunk_Format#Data_structure
@ -582,7 +483,7 @@ void cChunkDataSerializer::WriteSectionDataSeamless(cByteBuffer & a_Packet, cons
{
const UInt32 BlockType = a_Section.m_BlockTypes[Index];
const UInt32 BlockMeta = (a_Section.m_BlockMetas[Index / 2] >> ((Index % 2) * 4)) & 0x0f;
const UInt32 Value = Palette_1_14::FromBlock(PaletteUpgrade::FromBlock(BlockType, BlockMeta));
const UInt32 Value = Palette(BlockType, BlockMeta);
// Write as much as possible of Value, starting from BitIndex, into Buffer:
Buffer |= static_cast<UInt64>(Value) << BitIndex;

1
src/Protocol/ChunkDataSerializer.h
View File

@ -42,6 +42,7 @@ protected:
/** Writes all blocks in a chunk section into a series of Int64.
Writes start from the bit directly subsequent to the previous write's end, possibly crossing over to the next Int64. */
template <auto Palette>
inline void WriteSectionDataSeamless(cByteBuffer & a_Packet, const cChunkData::sChunkSection & a_Section, const UInt8 a_BitsPerEntry);
/** Finalises the data, compresses it if required, and delivers it to all clients. */