Implement anvil chunk sparsing

src/ChunkData.cpp

@@ -422,6 +422,129 @@ void cChunkData::CopySkyLight(NIBBLETYPE * a_Dest) const
 
 
 
+void cChunkData::FillBlockTypes(BLOCKTYPE a_Value)
+{
+	// If needed, allocate any missing sections
+	if (a_Value != 0x00)
+	{
+		for (auto & Section : m_Sections)
+		{
+			if (Section == nullptr)
+			{
+				Section = Allocate();
+				std::fill(std::begin(Section->m_BlockMetas),    std::end(Section->m_BlockMetas),    0x00);
+				std::fill(std::begin(Section->m_BlockLight),    std::end(Section->m_BlockLight),    0x00);
+				std::fill(std::begin(Section->m_BlockSkyLight), std::end(Section->m_BlockSkyLight), 0xff);
+			}
+		}
+	}
+
+	for (auto Section : m_Sections)
+	{
+		if (Section != nullptr)
+		{
+			std::fill(std::begin(Section->m_BlockTypes), std::end(Section->m_BlockTypes), a_Value);
+		}
+	}
+}
+
+
+
+
+
+void cChunkData::FillMetas(NIBBLETYPE a_Value)
+{
+	// If needed, allocate any missing sections
+	if (a_Value != 0x00)
+	{
+		for (auto & Section : m_Sections)
+		{
+			if (Section == nullptr)
+			{
+				Section = Allocate();
+				std::fill(std::begin(Section->m_BlockTypes),    std::end(Section->m_BlockTypes),    0x00);
+				std::fill(std::begin(Section->m_BlockLight),    std::end(Section->m_BlockLight),    0x00);
+				std::fill(std::begin(Section->m_BlockSkyLight), std::end(Section->m_BlockSkyLight), 0xff);
+			}
+		}
+	}
+
+	NIBBLETYPE NewMeta = static_cast<NIBBLETYPE>((a_Value << 4) | a_Value);
+	for (auto Section : m_Sections)
+	{
+		if (Section != nullptr)
+		{
+			std::fill(std::begin(Section->m_BlockMetas), std::end(Section->m_BlockMetas), NewMeta);
+		}
+	}
+}
+
+
+
+
+
+void cChunkData::FillBlockLight(NIBBLETYPE a_Value)
+{
+	// If needed, allocate any missing sections
+	if (a_Value != 0x00)
+	{
+		for (auto & Section : m_Sections)
+		{
+			if (Section == nullptr)
+			{
+				Section = Allocate();
+				std::fill(std::begin(Section->m_BlockTypes), std::end(Section->m_BlockTypes), 0x00);
+				std::fill(std::begin(Section->m_BlockMetas), std::end(Section->m_BlockMetas), 0x00);
+				std::fill(std::begin(Section->m_BlockSkyLight), std::end(Section->m_BlockSkyLight), 0xff);
+			}
+		}
+	}
+
+	NIBBLETYPE NewLight = static_cast<NIBBLETYPE>((a_Value << 4) | a_Value);
+	for (auto Section : m_Sections)
+	{
+		if (Section != nullptr)
+		{
+			std::fill(std::begin(Section->m_BlockLight), std::end(Section->m_BlockLight), NewLight);
+		}
+	}
+}
+
+
+
+
+
+void cChunkData::FillSkyLight(NIBBLETYPE a_Value)
+{
+	// If needed, allocate any missing sections
+	if (a_Value != 0x0f)
+	{
+		for (auto & Section : m_Sections)
+		{
+			if (Section == nullptr)
+			{
+				Section = Allocate();
+				std::fill(std::begin(Section->m_BlockTypes), std::end(Section->m_BlockTypes), 0x00);
+				std::fill(std::begin(Section->m_BlockMetas), std::end(Section->m_BlockMetas), 0x00);
+				std::fill(std::begin(Section->m_BlockLight), std::end(Section->m_BlockLight), 0x00);
+			}
+		}
+	}
+
+	NIBBLETYPE NewSkyLight = static_cast<NIBBLETYPE>((a_Value << 4) | a_Value);
+	for (auto Section : m_Sections)
+	{
+		if (Section != nullptr)
+		{
+			std::fill(std::begin(Section->m_BlockSkyLight), std::end(Section->m_BlockSkyLight), NewSkyLight);
+		}
+	}
+}
+
+
+
+
+
 void cChunkData::SetBlockTypes(const BLOCKTYPE * a_Src)
 {
 	ASSERT(a_Src != nullptr);

src/ChunkData.h

@@ -80,6 +80,18 @@ public:
 	/** Copies the skylight data into the specified flat array. */
 	void CopySkyLight  (NIBBLETYPE * a_Dest) const;
 
+	/** Fills the chunk with the specified block. */
+	void FillBlockTypes(BLOCKTYPE a_Value);
+
+	/** Fills the chunk with the specified meta value. */
+	void FillMetas     (NIBBLETYPE a_Value);
+
+	/** Fills the chunk with the specified block light. */
+	void FillBlockLight(NIBBLETYPE a_Value);
+
+	/** Fills the chunk with the specified sky light. */
+	void FillSkyLight  (NIBBLETYPE a_Value);
+
 	/** Copies the blocktype data from the specified flat array into the internal representation.
 	Allocates sections that are needed for the operation.
 	Requires that a_Src is a valid pointer. */

src/WorldStorage/NBTChunkSerializer.cpp

@@ -68,11 +68,11 @@ void cNBTChunkSerializer::Finish(void)
 		m_Writer.EndList();
 	}
 
-	// If light not valid, reset it to all zeroes:
+	// If light not valid, reset it to defaults:
 	if (!m_IsLightValid)
 	{
-		memset(m_BlockLight,    0, sizeof(m_BlockLight));
-		memset(m_BlockSkyLight, 0, sizeof(m_BlockSkyLight));
+		m_Data.FillBlockLight(0x00);
+		m_Data.FillSkyLight(0x0f);
 	}
 
 	// Check if "Entity" and "TileEntities" lists exists. MCEdit requires this.

src/WorldStorage/NBTChunkSerializer.h

@@ -1,4 +1,4 @@
-
+
 // NBTChunkSerializer.h
 
 // Declares the cNBTChunkSerializer class that is used for saving individual chunks into NBT format used by Anvil
@@ -55,7 +55,7 @@ class cPainting;
 
 
 class cNBTChunkSerializer :
-	public cChunkDataSeparateCollector
+	public cChunkDataCopyCollector
 {
 public:
 	cChunkDef::BiomeMap m_Biomes;
@@ -69,15 +69,12 @@ public:
 	/** Close NBT tags that we've opened */
 	void Finish(void);
 
-	bool IsLightValid(void) const {return m_IsLightValid; }
+	bool IsLightValid(void) const { return m_IsLightValid; }
 
 protected:
 
-	/* From cChunkDataSeparateCollector we inherit:
-	- m_BlockTypes[]
-	- m_BlockMetas[]
-	- m_BlockLight[]
-	- m_BlockSkyLight[] */
+	/* From cChunkDataCopyCollector we inherit:
+	- cChunkData m_Data */
 
 	cFastNBTWriter & m_Writer;
 

src/WorldStorage/WSSAnvil.cpp

@@ -515,23 +515,25 @@ bool cWSSAnvil::SaveChunkToNBT(const cChunkCoords & a_Chunk, cFastNBTWriter & a_
 
 	// Save blockdata:
 	a_Writer.BeginList("Sections", TAG_Compound);
-	size_t SliceSizeBlock  = cChunkDef::Width * cChunkDef::Width * 16;
-	size_t SliceSizeNibble = SliceSizeBlock / 2;
-	const char * BlockTypes    = reinterpret_cast<const char *>(Serializer.m_BlockTypes);
-	const char * BlockMetas    = reinterpret_cast<const char *>(Serializer.m_BlockMetas);
-	#ifdef DEBUG_SKYLIGHT
-		const char * BlockLight  = reinterpret_cast<const char *>(Serializer.m_BlockSkyLight);
-	#else
-		const char * BlockLight  = reinterpret_cast<const char *>(Serializer.m_BlockLight);
-	#endif
-	const char * BlockSkyLight = reinterpret_cast<const char *>(Serializer.m_BlockSkyLight);
-	for (int Y = 0; Y < 16; Y++)
+	for (size_t Y = 0; Y != cChunkData::NumSections; ++Y)
 	{
+		auto Section = Serializer.m_Data.GetSection(Y);
+		if (Section == nullptr)
+		{
+			continue;
+		}
+
 		a_Writer.BeginCompound("");
-		a_Writer.AddByteArray("Blocks",     BlockTypes    + static_cast<unsigned int>(Y) * SliceSizeBlock,  SliceSizeBlock);
-		a_Writer.AddByteArray("Data",       BlockMetas    + static_cast<unsigned int>(Y) * SliceSizeNibble, SliceSizeNibble);
-		a_Writer.AddByteArray("SkyLight",   BlockSkyLight + static_cast<unsigned int>(Y) * SliceSizeNibble, SliceSizeNibble);
-		a_Writer.AddByteArray("BlockLight", BlockLight    + static_cast<unsigned int>(Y) * SliceSizeNibble, SliceSizeNibble);
+		a_Writer.AddByteArray("Blocks", reinterpret_cast<const char *>(Section->m_BlockTypes), ARRAYCOUNT(Section->m_BlockTypes));
+		a_Writer.AddByteArray("Data",   reinterpret_cast<const char *>(Section->m_BlockMetas), ARRAYCOUNT(Section->m_BlockMetas));
+
+		#ifdef DEBUG_SKYLIGHT
+			a_Writer.AddByteArray("BlockLight", reinterpret_cast<const char *>(Section->m_BlockSkyLight), ARRAYCOUNT(Section->m_BlockSkyLight));
+		#else
+			a_Writer.AddByteArray("BlockLight", reinterpret_cast<const char *>(Section->m_BlockLight),    ARRAYCOUNT(Section->m_BlockLight));
+		#endif
+
+		a_Writer.AddByteArray("SkyLight", reinterpret_cast<const char *>(Section->m_BlockSkyLight), ARRAYCOUNT(Section->m_BlockSkyLight));
 		a_Writer.AddByte("Y", static_cast<unsigned char>(Y));
 		a_Writer.EndCompound();
 	}