- everything compiles again.

As a bonus this already fixes several bugs caused by the botched texture scaling implementation the original texture manager came with.
System cursors are currently disabled because they rely on functionality that needs to be moved to different classes.

src/win32/i_system.cpp

@@ -912,10 +912,12 @@ int I_PickIWad(WadStuff *wads, int numwads, bool showwin, int defaultiwad)
 //
 //==========================================================================
 
+// Custom cursors temporarily disabled until this can directly reference a texture's backing image.
 bool I_SetCursor(FTexture *cursorpic)
 {
 	HCURSOR cursor;
 
+#if 0
 	if (cursorpic != NULL && cursorpic->UseType != ETextureType::Null)
 	{
 		// Must be no larger than 32x32.
@@ -939,6 +941,7 @@ bool I_SetCursor(FTexture *cursorpic)
 		atterm(DestroyCustomCursor);
 	}
 	else
+#endif
 	{
 		DestroyCustomCursor();
 		cursor = LoadCursor(NULL, IDC_ARROW);
@@ -974,6 +977,7 @@ bool I_SetCursor(FTexture *cursorpic)
 
 static HCURSOR CreateCompatibleCursor(FTexture *cursorpic)
 {
+#if 0
 	int picwidth = cursorpic->GetWidth();
 	int picheight = cursorpic->GetHeight();
 
@@ -1025,6 +1029,9 @@ static HCURSOR CreateCompatibleCursor(FTexture *cursorpic)
 
 	// Create the cursor from the bitmaps.
 	return CreateBitmapCursor(cursorpic->GetLeftOffset(0), cursorpic->GetTopOffset(0), and_mask, xor_mask);
+#else
+	return nullptr;
+#endif
 }
 
 //==========================================================================
@@ -1037,6 +1044,7 @@ static HCURSOR CreateCompatibleCursor(FTexture *cursorpic)
 
 static HCURSOR CreateAlphaCursor(FTexture *cursorpic)
 {
+#if 0
 	HDC dc;
 	BITMAPV5HEADER bi;
 	HBITMAP color, mono;
@@ -1109,6 +1117,9 @@ static HCURSOR CreateAlphaCursor(FTexture *cursorpic)
 	}
 
 	return CreateBitmapCursor(cursorpic->GetLeftOffset(0) * scale, cursorpic->GetTopOffset(0) * scale, mono, color);
+#else
+	return nullptr;
+#endif
 }
 
 //==========================================================================