Implementation of in-game maps

src/WorldStorage/MapSerializer.cpp

@@ -0,0 +1,189 @@
+
+// MapSerializer.cpp
+
+
+#include "Globals.h"
+#include "MapSerializer.h"
+#include "../StringCompression.h"
+#include "zlib/zlib.h"
+#include "FastNBT.h"
+
+#include "../Map.h"
+
+
+
+
+
+cMapSerializer::cMapSerializer(const AString& a_WorldName, cMap * a_Map)
+	: m_Map(a_Map)
+{
+	AString DataPath;
+	Printf(DataPath, "%s/data", a_WorldName.c_str());
+
+	Printf(m_Path, "%s/map_%i.dat", DataPath.c_str(), a_Map->GetID());
+
+	cFile::CreateFolder(FILE_IO_PREFIX + DataPath);
+}
+
+
+
+
+
+bool cMapSerializer::Load(void)
+{
+	AString Data = cFile::ReadWholeFile(FILE_IO_PREFIX + m_Path);
+	if (Data.empty())
+	{
+		return false;
+	}
+
+	AString Uncompressed;
+	int res = UncompressStringGZIP(Data.data(), Data.size(), Uncompressed);
+
+	if (res != Z_OK)
+	{
+		return false;
+	}
+
+	// Parse the NBT data:
+	cParsedNBT NBT(Uncompressed.data(), Uncompressed.size());
+	if (!NBT.IsValid())
+	{
+		// NBT Parsing failed
+		return false;
+	}
+
+	return LoadMapFromNBT(NBT);
+}
+
+
+
+
+
+bool cMapSerializer::Save(void)
+{
+	cFastNBTWriter Writer;
+
+	SaveMapToNBT(Writer);
+
+	Writer.Finish();
+	
+	#ifdef _DEBUG
+	cParsedNBT TestParse(Writer.GetResult().data(), Writer.GetResult().size());
+	ASSERT(TestParse.IsValid());
+	#endif  // _DEBUG
+
+	cFile File;
+	if (!File.Open(FILE_IO_PREFIX + m_Path, cFile::fmWrite))
+	{
+		return false;
+	}
+
+	AString Compressed;
+	int res = CompressStringGZIP(Writer.GetResult().data(), Writer.GetResult().size(), Compressed);
+
+	if (res != Z_OK)
+	{
+		return false;
+	}
+
+	File.Write(Compressed.data(), Compressed.size());
+	File.Close();
+
+	return true;
+}
+
+
+
+
+
+void cMapSerializer::SaveMapToNBT(cFastNBTWriter & a_Writer)
+{
+	a_Writer.BeginCompound("data");
+
+	a_Writer.AddByte("scale", m_Map->GetScale());
+	a_Writer.AddByte("dimension", (int) m_Map->GetDimension());
+
+	a_Writer.AddShort("width",  m_Map->GetWidth());
+	a_Writer.AddShort("height", m_Map->GetHeight());
+
+	a_Writer.AddInt("xCenter", m_Map->GetCenterX());
+	a_Writer.AddInt("zCenter", m_Map->GetCenterZ());
+
+	// Potential bug - The internal representation may change
+	const cMap::cColorList & Data = m_Map->GetData();
+	a_Writer.AddByteArray("colors", (char *) Data.data(), Data.size());
+
+	a_Writer.EndCompound();
+}
+
+
+
+
+
+bool cMapSerializer::LoadMapFromNBT(const cParsedNBT & a_NBT)
+{
+	int Data = a_NBT.FindChildByName(0, "data");
+	if (Data < 0)
+	{
+		return false;
+	}
+
+	int CurrLine = a_NBT.FindChildByName(Data, "scale");
+	if (CurrLine >= 0)
+	{
+		unsigned int Scale = a_NBT.GetByte(CurrLine);
+		m_Map->m_Scale = Scale;
+	}
+
+	CurrLine = a_NBT.FindChildByName(Data, "dimension");
+	if (CurrLine >= 0)
+	{
+		eDimension Dimension = (eDimension) a_NBT.GetByte(CurrLine);
+		
+		// ASSERT(Dimension == m_World.GetDimension());
+	}
+
+	CurrLine = a_NBT.FindChildByName(Data, "width");
+	if (CurrLine >= 0)
+	{
+		unsigned int Width = a_NBT.GetShort(CurrLine);
+		m_Map->m_Width = Width;
+	}
+
+	CurrLine = a_NBT.FindChildByName(Data, "height");
+	if (CurrLine >= 0)
+	{
+		unsigned int Height = a_NBT.GetShort(CurrLine);
+		m_Map->m_Height = Height;
+	}
+
+	CurrLine = a_NBT.FindChildByName(Data, "xCenter");
+	if (CurrLine >= 0)
+	{
+		int CenterX = a_NBT.GetInt(CurrLine);
+		m_Map->m_CenterX = CenterX;
+	}
+
+	CurrLine = a_NBT.FindChildByName(Data, "zCenter");
+	if (CurrLine >= 0)
+	{
+		int CenterZ = a_NBT.GetInt(CurrLine);
+		m_Map->m_CenterZ = CenterZ;
+	}
+
+	unsigned int NumPixels = m_Map->GetNumPixels();
+	m_Map->m_Data.resize(NumPixels);
+
+	// TODO xdot: Parse the byte array.
+
+	return true;
+}
+
+
+
+
+
+
+
+