From 675b4aa878f16291ce33fced48a2bc7425f635ae Mon Sep 17 00:00:00 2001 From: Alexander Harkness Date: Sun, 24 Nov 2013 14:19:41 +0000 Subject: Moved source to src --- src/Protocol/ChunkDataSerializer.cpp | 176 +++++++++++++++++++++++++++++++++++ 1 file changed, 176 insertions(+) create mode 100644 src/Protocol/ChunkDataSerializer.cpp (limited to 'src/Protocol/ChunkDataSerializer.cpp') diff --git a/src/Protocol/ChunkDataSerializer.cpp b/src/Protocol/ChunkDataSerializer.cpp new file mode 100644 index 000000000..2a9230fee --- /dev/null +++ b/src/Protocol/ChunkDataSerializer.cpp @@ -0,0 +1,176 @@ + +// ChunkDataSerializer.cpp + +// Implements the cChunkDataSerializer class representing the object that can: +// - serialize chunk data to different protocol versions +// - cache such serialized data for multiple clients + +#include "Globals.h" +#include "ChunkDataSerializer.h" +#include "zlib.h" + + + + +cChunkDataSerializer::cChunkDataSerializer( + const cChunkDef::BlockTypes & a_BlockTypes, + const cChunkDef::BlockNibbles & a_BlockMetas, + const cChunkDef::BlockNibbles & a_BlockLight, + const cChunkDef::BlockNibbles & a_BlockSkyLight, + const unsigned char * a_BiomeData +) : + m_BlockTypes(a_BlockTypes), + m_BlockMetas(a_BlockMetas), + m_BlockLight(a_BlockLight), + m_BlockSkyLight(a_BlockSkyLight), + m_BiomeData(a_BiomeData) +{ +} + + + + +const AString & cChunkDataSerializer::Serialize(int a_Version) +{ + Serializations::const_iterator itr = m_Serializations.find(a_Version); + if (itr != m_Serializations.end()) + { + return itr->second; + } + + AString data; + switch (a_Version) + { + case RELEASE_1_2_5: Serialize29(data); break; + case RELEASE_1_3_2: Serialize39(data); break; + // TODO: Other protocol versions may serialize the data differently; implement here + + default: + { + LOGERROR("cChunkDataSerializer::Serialize(): Unknown version: %d", a_Version); + ASSERT(!"Unknown chunk data serialization version"); + break; + } + } + m_Serializations[a_Version] = data; + return m_Serializations[a_Version]; +} + + + + + +void cChunkDataSerializer::Serialize29(AString & a_Data) +{ + // TODO: Do not copy data and then compress it; rather, compress partial blocks of data (zlib *can* stream) + + const int BiomeDataSize = cChunkDef::Width * cChunkDef::Width; + const int MetadataOffset = sizeof(m_BlockTypes); + const int BlockLightOffset = MetadataOffset + sizeof(m_BlockMetas); + const int SkyLightOffset = BlockLightOffset + sizeof(m_BlockLight); + const int BiomeOffset = SkyLightOffset + sizeof(m_BlockSkyLight); + const int DataSize = BiomeOffset + BiomeDataSize; + + // Temporary buffer for the composed data: + char AllData [DataSize]; + + memcpy(AllData, m_BlockTypes, sizeof(m_BlockTypes)); + memcpy(AllData + MetadataOffset, m_BlockMetas, sizeof(m_BlockMetas)); + memcpy(AllData + BlockLightOffset, m_BlockLight, sizeof(m_BlockLight)); + memcpy(AllData + SkyLightOffset, m_BlockSkyLight, sizeof(m_BlockSkyLight)); + memcpy(AllData + BiomeOffset, m_BiomeData, BiomeDataSize); + + // Compress the data: + // In order not to use allocation, use a fixed-size buffer, with the size + // that uses the same calculation as compressBound(): + const uLongf CompressedMaxSize = DataSize + (DataSize >> 12) + (DataSize >> 14) + (DataSize >> 25) + 16; + char CompressedBlockData[CompressedMaxSize]; + + uLongf CompressedSize = compressBound(DataSize); + + // Run-time check that our compile-time guess about CompressedMaxSize was enough: + ASSERT(CompressedSize <= CompressedMaxSize); + + compress2((Bytef*)CompressedBlockData, &CompressedSize, (const Bytef*)AllData, sizeof(AllData), Z_DEFAULT_COMPRESSION); + + // Now put all those data into a_Data: + + // "Ground-up continuous", or rather, "biome data present" flag: + a_Data.push_back('\x01'); + + // Two bitmaps; we're aways sending the full chunk with no additional data, so the bitmaps are 0xffff and 0, respectively + // Also, no endian flipping is needed because of the const values + unsigned short BitMap1 = 0xffff; + unsigned short BitMap2 = 0; + a_Data.append((const char *)&BitMap1, sizeof(short)); + a_Data.append((const char *)&BitMap2, sizeof(short)); + + Int32 CompressedSizeBE = htonl(CompressedSize); + a_Data.append((const char *)&CompressedSizeBE, sizeof(CompressedSizeBE)); + + Int32 UnusedInt32 = 0; + a_Data.append((const char *)&UnusedInt32, sizeof(UnusedInt32)); + + a_Data.append(CompressedBlockData, CompressedSize); +} + + + + + +void cChunkDataSerializer::Serialize39(AString & a_Data) +{ + // TODO: Do not copy data and then compress it; rather, compress partial blocks of data (zlib *can* stream) + + const int BiomeDataSize = cChunkDef::Width * cChunkDef::Width; + const int MetadataOffset = sizeof(m_BlockTypes); + const int BlockLightOffset = MetadataOffset + sizeof(m_BlockMetas); + const int SkyLightOffset = BlockLightOffset + sizeof(m_BlockLight); + const int BiomeOffset = SkyLightOffset + sizeof(m_BlockSkyLight); + const int DataSize = BiomeOffset + BiomeDataSize; + + // Temporary buffer for the composed data: + char AllData [DataSize]; + + memcpy(AllData, m_BlockTypes, sizeof(m_BlockTypes)); + memcpy(AllData + MetadataOffset, m_BlockMetas, sizeof(m_BlockMetas)); + memcpy(AllData + BlockLightOffset, m_BlockLight, sizeof(m_BlockLight)); + memcpy(AllData + SkyLightOffset, m_BlockSkyLight, sizeof(m_BlockSkyLight)); + memcpy(AllData + BiomeOffset, m_BiomeData, BiomeDataSize); + + // Compress the data: + // In order not to use allocation, use a fixed-size buffer, with the size + // that uses the same calculation as compressBound(): + const uLongf CompressedMaxSize = DataSize + (DataSize >> 12) + (DataSize >> 14) + (DataSize >> 25) + 16; + char CompressedBlockData[CompressedMaxSize]; + + uLongf CompressedSize = compressBound(DataSize); + + // Run-time check that our compile-time guess about CompressedMaxSize was enough: + ASSERT(CompressedSize <= CompressedMaxSize); + + compress2((Bytef*)CompressedBlockData, &CompressedSize, (const Bytef*)AllData, sizeof(AllData), Z_DEFAULT_COMPRESSION); + + // Now put all those data into a_Data: + + // "Ground-up continuous", or rather, "biome data present" flag: + a_Data.push_back('\x01'); + + // Two bitmaps; we're aways sending the full chunk with no additional data, so the bitmaps are 0xffff and 0, respectively + // Also, no endian flipping is needed because of the const values + unsigned short BitMap1 = 0xffff; + unsigned short BitMap2 = 0; + a_Data.append((const char *)&BitMap1, sizeof(short)); + a_Data.append((const char *)&BitMap2, sizeof(short)); + + Int32 CompressedSizeBE = htonl(CompressedSize); + a_Data.append((const char *)&CompressedSizeBE, sizeof(CompressedSizeBE)); + + // Unlike 29, 39 doesn't have the "unused" int + + a_Data.append(CompressedBlockData, CompressedSize); +} + + + + -- cgit v1.2.3 From e3db69c4ae5d373ea1f1b31c0fc1889f328ea2ed Mon Sep 17 00:00:00 2001 From: Tiger Wang Date: Sun, 24 Nov 2013 18:44:22 +0000 Subject: Attempt to fix compilation --- src/Protocol/ChunkDataSerializer.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'src/Protocol/ChunkDataSerializer.cpp') diff --git a/src/Protocol/ChunkDataSerializer.cpp b/src/Protocol/ChunkDataSerializer.cpp index 2a9230fee..c83a87ca9 100644 --- a/src/Protocol/ChunkDataSerializer.cpp +++ b/src/Protocol/ChunkDataSerializer.cpp @@ -7,7 +7,7 @@ #include "Globals.h" #include "ChunkDataSerializer.h" -#include "zlib.h" +#include "../lib/zlib/zlib.h" -- cgit v1.2.3 From 32449f1fca8379d0c7f38e95834b2a01e62de06c Mon Sep 17 00:00:00 2001 From: Tiger Wang Date: Mon, 25 Nov 2013 18:29:36 +0000 Subject: Further attempts to fix compile --- src/Protocol/ChunkDataSerializer.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'src/Protocol/ChunkDataSerializer.cpp') diff --git a/src/Protocol/ChunkDataSerializer.cpp b/src/Protocol/ChunkDataSerializer.cpp index c83a87ca9..d406b8b51 100644 --- a/src/Protocol/ChunkDataSerializer.cpp +++ b/src/Protocol/ChunkDataSerializer.cpp @@ -7,7 +7,7 @@ #include "Globals.h" #include "ChunkDataSerializer.h" -#include "../lib/zlib/zlib.h" +#include "lib/zlib/zlib.h" -- cgit v1.2.3 From d925cf4def76d6db05a46d3ead77e6c76cfdd268 Mon Sep 17 00:00:00 2001 From: Alexander Harkness Date: Wed, 27 Nov 2013 07:40:59 +0000 Subject: Fixed the remaining derps --- src/Protocol/ChunkDataSerializer.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'src/Protocol/ChunkDataSerializer.cpp') diff --git a/src/Protocol/ChunkDataSerializer.cpp b/src/Protocol/ChunkDataSerializer.cpp index d406b8b51..78318a5ee 100644 --- a/src/Protocol/ChunkDataSerializer.cpp +++ b/src/Protocol/ChunkDataSerializer.cpp @@ -7,7 +7,7 @@ #include "Globals.h" #include "ChunkDataSerializer.h" -#include "lib/zlib/zlib.h" +#include "zlib/zlib.h" -- cgit v1.2.3