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