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authorAlexander Harkness <bearbin@gmail.com>2013-11-24 15:19:41 +0100
committerAlexander Harkness <bearbin@gmail.com>2013-11-24 15:19:41 +0100
commit675b4aa878f16291ce33fced48a2bc7425f635ae (patch)
tree409914df27a98f65adf866da669429c4de141b6f /src/WorldStorage/WSSCompact.h
parentLineBlockTracer: Using the coord-based block faces. (diff)
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diff --git a/src/WorldStorage/WSSCompact.h b/src/WorldStorage/WSSCompact.h
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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 "../Vector3i.h"
+
+
+
+
+
+/// Helper class for serializing a chunk into Json
+class cJsonChunkSerializer :
+ public cChunkDataCollector
+{
+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 bool LightIsValid (bool a_IsLightValid) override;
+} ;
+
+
+
+
+
+class cWSSCompact :
+ public cWSSchema
+{
+public:
+ cWSSCompact(cWorld * a_World) : cWSSchema(a_World) {}
+ virtual ~cWSSCompact();
+
+protected:
+
+ 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);
+ ~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_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
+
+ /// 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
+
+
+
+