158 lines
4.5 KiB
C++
158 lines
4.5 KiB
C++
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// WSSCompact.h
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// Interfaces to the cWSSCompact class representing the "Compact" storage schema (PAK-files)
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#pragma once
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#ifndef WSSCOMPACT_H_INCLUDED
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#define WSSCOMPACT_H_INCLUDED
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#include "WorldStorage.h"
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#include "../Vector3.h"
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#include "json/json.h"
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#include "ChunkDataCallback.h"
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/// Helper class for serializing a chunk into Json
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class cJsonChunkSerializer :
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public cChunkDataArrayCollector
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{
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public:
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cJsonChunkSerializer(void);
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Json::Value & GetRoot (void) {return m_Root; }
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BLOCKTYPE * GetBlockData(void) {return (BLOCKTYPE *)m_BlockData; }
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bool HasJsonData (void) const {return m_HasJsonData; }
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protected:
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// NOTE: block data is serialized into inherited cChunkDataCollector's m_BlockData[] array
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// Entities and BlockEntities are serialized to Json
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Json::Value m_Root;
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bool m_HasJsonData;
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// cChunkDataCollector overrides:
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virtual void Entity (cEntity * a_Entity) override;
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virtual void BlockEntity (cBlockEntity * a_Entity) override;
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virtual void LightIsValid (bool a_IsLightValid) override;
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} ;
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class cWSSCompact :
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public cWSSchema
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{
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public:
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cWSSCompact(cWorld * a_World, int a_CompressionFactor) : cWSSchema(a_World), m_CompressionFactor(a_CompressionFactor) {}
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virtual ~cWSSCompact();
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protected:
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enum
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{
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// Offsets to individual components in the joined blockdata array
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MetaOffset = cChunkDef::NumBlocks,
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LightOffset = MetaOffset + cChunkDef::NumBlocks / 2,
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SkyLightOffset = LightOffset + cChunkDef::NumBlocks / 2,
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} ;
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struct sChunkHeader;
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typedef std::vector<sChunkHeader *> sChunkHeaders;
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/// Implements a cache for a single PAK file; implements lazy-write in order to be able to write multiple chunks fast
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class cPAKFile
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{
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public:
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cPAKFile(const AString & a_FileName, int a_LayerX, int a_LayerZ, int a_CompressionFactor);
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~cPAKFile();
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bool GetChunkData(const cChunkCoords & a_Chunk, int & a_UncompressedSize, AString & a_Data);
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bool SetChunkData(const cChunkCoords & a_Chunk, int a_UncompressedSize, const AString & a_Data);
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bool EraseChunkData(const cChunkCoords & a_Chunk);
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bool SaveChunk(const cChunkCoords & a_Chunk, cWorld * a_World);
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int GetLayerX(void) const {return m_LayerX; }
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int GetLayerZ(void) const {return m_LayerZ; }
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static const int PAK_VERSION = 1;
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#if AXIS_ORDER == AXIS_ORDER_XZY
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static const int CHUNK_VERSION = 3;
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#elif AXIS_ORDER == AXIS_ORDER_YZX
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static const int CHUNK_VERSION = 2;
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#endif
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protected:
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AString m_FileName;
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int m_CompressionFactor;
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int m_LayerX;
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int m_LayerZ;
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sChunkHeaders m_ChunkHeaders;
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AString m_DataContents; // Data contents of the file, cached
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int m_NumDirty; // Number of chunks that were written into m_DataContents but not into the file
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Vector3i m_ChunkSize; // Is related to m_ChunkVersion
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char m_ChunkVersion;
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char m_PakVersion;
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bool SaveChunkToData(const cChunkCoords & a_Chunk, cWorld * a_World); // Saves the chunk to m_DataContents, updates headers and m_NumDirty
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void SynchronizeFile(void); // Writes m_DataContents along with the headers to file, resets m_NumDirty
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void UpdateChunk1To2(void); // Height from 128 to 256
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void UpdateChunk2To3(void); // Axis order from YZX to XZY
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} ;
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typedef std::list<cPAKFile *> cPAKFiles;
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cCriticalSection m_CS;
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cPAKFiles m_PAKFiles; // A MRU cache of PAK files
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int m_CompressionFactor;
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/// Loads the correct PAK file either from cache or from disk, manages the m_PAKFiles cache
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cPAKFile * LoadPAKFile(const cChunkCoords & a_Chunk);
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/// Gets chunk data from the correct file; locks CS as needed
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bool GetChunkData(const cChunkCoords & a_Chunk, int & a_UncompressedSize, AString & a_Data);
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/// Sets chunk data to the correct file; locks CS as needed
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bool SetChunkData(const cChunkCoords & a_Chunk, int a_UncompressedSize, const AString & a_Data);
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/// Erases chunk data from the correct file; locks CS as needed
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bool EraseChunkData(const cChunkCoords & a_Chunk);
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/// Loads the chunk from the data (no locking needed)
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bool LoadChunkFromData(const cChunkCoords & a_Chunk, int a_UncompressedSize, const AString & a_Data, cWorld * a_World);
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void LoadEntitiesFromJson(Json::Value & a_Value, cEntityList & a_Entities, cBlockEntityList & a_BlockEntities, cWorld * a_World);
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// cWSSchema overrides:
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virtual bool LoadChunk(const cChunkCoords & a_Chunk) override;
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virtual bool SaveChunk(const cChunkCoords & a_Chunk) override;
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virtual const AString GetName(void) const override {return "compact"; }
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} ;
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#endif // WSSCOMPACT_H_INCLUDED
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