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87 lines
2.3 KiB
C++
87 lines
2.3 KiB
C++
/********************************************************************
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Minecraft: Pocket Edition - Decompilation Project
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Copyright (C) 2023 iProgramInCpp
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The following code is licensed under the BSD 1 clause license.
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SPDX-License-Identifier: BSD-1-Clause
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********************************************************************/
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#include "../Packet.hpp"
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#include "world/level/levelgen/chunk/LevelChunk.hpp"
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void LevelDataPacket::handle(const RakNet::RakNetGUID& guid, NetEventCallback* pCallback)
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{
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pCallback->handle(guid, this);
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}
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void LevelDataPacket::write(RakNet::BitStream* pbs)
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{
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// @TODO: Maybe offload this to a different 'worker thread'? Or maybe just the compression job?
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// send a crapton of them in a raw packet(why? Laziness)
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int chunksX = C_MAX_CHUNKS_X;
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int chunksZ = C_MAX_CHUNKS_Z;
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int minus9999 = -9999;
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RakNet::BitStream bs;
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pbs->Write((unsigned char)PACKET_LEVEL_DATA);
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int uncompMagic = 12847812, compMagic = 58712758, chunkSepMagic = 284787658;
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bs.Write(uncompMagic);
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bs.Write(chunksX);
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bs.Write(chunksZ);
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for (int x = 0; x < chunksX; x++)
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{
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for (int z = 0; z < chunksZ; z++)
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{
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bs.Write(chunkSepMagic);
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RakNet::BitStream bs2;
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LevelChunk* pChunk = m_pLevel->getChunk(x, z);
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ChunkDataPacket cdp(x, z, pChunk);
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cdp.write(&bs2);
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int dataSize = int(bs2.GetNumberOfBytesUsed());
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bs.Write(dataSize);
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bs.Write((const char*)bs2.GetData(), dataSize);
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}
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}
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// compress it
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size_t compSize = 0;
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size_t uncompSize = bs.GetNumberOfBytesUsed();
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uint8_t* pCompressedData = nullptr;
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if (uncompSize > 1024)
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{
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// takes about 5ms on release to compress everything on L4, compression ratio is around 14-15%.
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// Increase or decrease this depending on your server's load.
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pCompressedData = ZlibDeflateToMemoryLvl(bs.GetData(), uncompSize, &compSize, 4);
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}
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if (pCompressedData)
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{
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//float ratio = 100.0f * float(compSize) / float(uncompSize);
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//LOG_I("Compression ratio: %.2f (%d comp, %d uncomp)", ratio, int(compSize), int(uncompSize));
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int cs2 = int(compSize), us2 = int(uncompSize);
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bs.Reset();
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bs.Write(compMagic);
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bs.Write(us2);
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bs.Write(cs2);
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bs.Write((const char*)pCompressedData, compSize);
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SAFE_DELETE_ARRAY(pCompressedData);
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}
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else
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{
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//LOG_I("Level not compressed.");
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}
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pbs->Write(bs);
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return;
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}
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void LevelDataPacket::read(RakNet::BitStream* bs)
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{
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bs->Read(m_data);
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}
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