1 files changed, 105 insertions, 0 deletions

diff --git a/src/ChunkDataCallback.h b/src/ChunkDataCallback.h
new file mode 100644
index 000000000..76c45040e
--- /dev/null
+++ b/src/ChunkDataCallback.h
@@ -0,0 +1,105 @@
+
+
+#pragma once
+
+
+#include "ChunkBuffer.h"
+
+
+/** Interface class used for getting data out of a chunk using the GetAllData() function.
+Implementation must use the pointers immediately and NOT store any of them for later use
+The virtual methods are called in the same order as they're declared here.
+*/
+class cChunkDataCallback abstract
+{
+public:
+
+	virtual ~cChunkDataCallback() {}
+
+	/** Called before any other callbacks to inform of the current coords 
+	(only in processes where multiple chunks can be processed, such as cWorld::ForEachChunkInRect()). 
+	If false is returned, the chunk is skipped.
+	*/
+	virtual bool Coords(int a_ChunkX, int a_ChunkZ) { UNUSED(a_ChunkX); UNUSED(a_ChunkZ); return true; };
+	
+	/// Called once to provide heightmap data
+	virtual void HeightMap(const cChunkDef::HeightMap * a_HeightMap) {UNUSED(a_HeightMap); };
+	
+	/// Called once to provide biome data
+	virtual void BiomeData    (const cChunkDef::BiomeMap * a_BiomeMap) {UNUSED(a_BiomeMap); };
+	
+	/// Called once to let know if the chunk lighting is valid. Return value is ignored
+	virtual void LightIsValid(bool a_IsLightValid) {UNUSED(a_IsLightValid); };
+	
+	/// Called once to export block info
+	virtual void ChunkBuffer   (const cChunkBuffer & a_Buffer) {UNUSED(a_Buffer); };
+	
+	/// Called for each entity in the chunk
+	virtual void Entity(cEntity * a_Entity) {UNUSED(a_Entity); };
+	
+	/// Called for each blockentity in the chunk
+	virtual void BlockEntity(cBlockEntity * a_Entity) {UNUSED(a_Entity); };
+} ;
+
+/** A simple implementation of the cChunkDataCallback interface that collects all block data into a buffer
+*/
+class cChunkBufferCollector :
+	public cChunkDataCallback
+{
+public:
+
+	cChunkBuffer m_BlockData;
+
+protected:
+
+	virtual void ChunkBuffer(const cChunkBuffer & a_BlockData) override
+	{
+		m_BlockData = a_BlockData.Copy();
+	}
+};
+
+
+/** A simple implementation of the cChunkDataCallback interface that collects all block data into a single buffer
+*/
+class cChunkDataCollector :
+public cChunkDataCallback
+{
+public:
+
+	// Must be unsigned char instead of BLOCKTYPE or NIBBLETYPE, because it houses both.
+	unsigned char m_BlockData[cChunkDef::BlockDataSize];
+
+protected:
+
+	virtual void ChunkBuffer(const cChunkBuffer & a_ChunkBuffer) override
+	{
+		a_ChunkBuffer.CopyBlocks(m_BlockData);
+		a_ChunkBuffer.CopyMeta(m_BlockData + cChunkDef::NumBlocks);
+		a_ChunkBuffer.CopyLight(m_BlockData + 3 * cChunkDef::NumBlocks / 2);
+		a_ChunkBuffer.CopySkyLight(m_BlockData + 2 * cChunkDef::NumBlocks);
+	}
+};
+
+/** A simple implementation of the cChunkDataCallback interface that collects all block data into a separate buffers
+*/
+class cChunkDataSeparateCollector :
+public cChunkDataCallback
+{
+public:
+
+	cChunkDef::BlockTypes m_BlockTypes;
+	cChunkDef::BlockNibbles m_BlockMetas;
+	cChunkDef::BlockNibbles m_BlockLight;
+	cChunkDef::BlockNibbles m_BlockSkyLight;
+
+protected:
+
+	virtual void ChunkBuffer(const cChunkBuffer & a_ChunkBuffer) override
+	{
+	a_ChunkBuffer.CopyBlocks(m_BlockTypes);
+	a_ChunkBuffer.CopyMeta(m_BlockMetas);
+	a_ChunkBuffer.CopyLight(m_BlockLight);
+	a_ChunkBuffer.CopySkyLight(m_BlockSkyLight);
+	}
+} ;
+