C4Landscape::DrawMap() extended to allow access to named overlays fro…

…m the MapCreator if kept

src/C4Landscape.cpp

@@ -2659,11 +2659,16 @@ bool C4Landscape::DrawMap(int32_t iX, int32_t iY, int32_t iWdt, int32_t iHgt, co
 	FakeLS.MapWdt.Set(iMapWdt, 0, iMapWdt, iMapWdt);
 	FakeLS.MapHgt.Set(iMapHgt, 0, iMapHgt, iMapHgt);
 	// create map creator
-	C4MapCreatorS2 MapCreator(&FakeLS, &Game.TextureMap, &Game.Material, Game.Parameters.StartupPlayerCount);
+	std::unique_ptr<C4MapCreatorS2> MapCreator;
+	// If KeepMapCreator=1 we copy the existing creator to gain access to the named overlays
+	if (!pMapCreator) 
+		MapCreator = std::make_unique<C4MapCreatorS2>(&FakeLS, &Game.TextureMap, &Game.Material, Game.Parameters.StartupPlayerCount);
+	else
+	    MapCreator = std::make_unique<C4MapCreatorS2>(*pMapCreator, &FakeLS);
 	// read file
-	MapCreator.ReadScript(szMapDef);
+	MapCreator->ReadScript(szMapDef);
 	// render map
-	CSurface8 *sfcMap = MapCreator.Render(nullptr);
+	CSurface8 *sfcMap = MapCreator->Render(nullptr);
 	if (!sfcMap) return false;
 	// map it to the landscape
 	bool fSuccess = MapToLandscape(sfcMap, 0, 0, iMapWdt, iMapHgt, iX, iY);

src/C4MapCreatorS2.cpp

@@ -141,8 +141,12 @@ C4MCNode::C4MCNode(C4MCNode *pOwner, C4MCNode &rTemplate, bool fClone)
 	// copy children from template
 	for (C4MCNode *pChild = rTemplate.Child0; pChild; pChild = pChild->Next)
 		pChild->clone(this);
-	// no name
-	*Name = 0;
+
+    // Preserve the name if pOwner is a MCN_Node, which is only the case if pOwner is a C4MapCreatorS2
+    if (pOwner && pOwner->Type() == MCN_Node)
+        SCopy(rTemplate.Name, Name, C4MaxName);
+    else 
+        *Name = 0;  // Default behavior: reset the name
 }
 
 C4MCNode::~C4MCNode()
@@ -694,6 +698,21 @@ C4MapCreatorS2::C4MapCreatorS2(C4SLandscape *pLandscape, C4TextureMap *pTexMap,
 	Default();
 }
 
+C4MapCreatorS2::C4MapCreatorS2(C4MapCreatorS2 &rTemplate, C4SLandscape *pLandscape) : C4MCNode(nullptr, rTemplate, true)
+{
+	// me r b creator
+	MapCreator = this;
+	// store members
+	Landscape = pLandscape; TexMap = rTemplate.TexMap; MatMap = rTemplate.MatMap;
+	PlayerCount = rTemplate.PlayerCount;
+	// set engine field for default stuff
+	DefaultMap.MapCreator = this;
+	DefaultOverlay.MapCreator = this;
+	DefaultPoint.MapCreator = this;
+	// default to landscape settings
+	Default();
+}
+
 C4MapCreatorS2::~C4MapCreatorS2()
 {
 	// clear fields

src/C4MapCreatorS2.h

@@ -349,8 +349,10 @@ class C4MapCreatorS2 : public C4MCNode
 {
 public:
 	C4MapCreatorS2(C4SLandscape *pLandscape, C4TextureMap *pTexMap, C4MaterialMap *pMatMap, int iPlayerCount);
+	C4MapCreatorS2(C4MapCreatorS2 &rTemplate, C4SLandscape *pLandscape); // construct of template
 	~C4MapCreatorS2();
 
+
 	void Default(); // set default data
 	void Clear(); // clear any data
 	bool ReadFile(const char *szFilename, C4Group *pGrp); // read defs of file