Adding in new .cpp versions of FT font code.

src/osgText/FTCharmap.cpp

@@ -0,0 +1,91 @@
+#include	"FTCharmap.h"
+
+
+FTCharmap::FTCharmap( FT_Face face)
+:	err(0),
+	ftFace( face)
+{
+	ftEncoding = face->charmap->encoding;
+}
+
+
+FTCharmap::~FTCharmap()
+{
+	charMap.clear();
+}
+
+
+bool FTCharmap::CharMap( FT_Encoding encoding)
+{
+	if( ftEncoding == encoding)
+	{
+		return true;
+	}
+	
+	err = FT_Select_Charmap( ftFace, encoding );
+	
+	if( !err)
+	{
+		ftEncoding = encoding;
+		charMap.clear();
+	}
+	
+	return !err;
+}
+
+
+bool FTCharmap::CharMap( FT_UShort platform, FT_UShort encoding)
+{
+	FT_CharMap  found = 0;
+	FT_CharMap  charmap;
+ 
+	for( int n = 0; n < ftFace->num_charmaps; n++ )
+	{
+		charmap = ftFace->charmaps[n];
+
+		if( charmap->platform_id == platform && charmap->encoding_id == encoding)
+		{
+			found = charmap;
+			break;
+		}
+	}
+ 
+	if( !found )
+	{
+		return false;
+	}
+ 
+	if( ftEncoding == found->encoding)
+	{
+		return true;
+	}
+	
+	/* now, select the charmap for the face object */
+	err = FT_Set_Charmap( ftFace, found );
+	
+	if( !err)
+	{
+		ftEncoding = found->encoding;
+		charMap.clear();
+	}
+	
+	return !err;
+}
+
+
+unsigned int FTCharmap::CharIndex( unsigned int index )
+{
+	CharacterMap::const_iterator result = charMap.find( index);
+		
+	if( result == charMap.end())
+	{
+		unsigned int glyph = FT_Get_Char_Index( ftFace, index);
+		charMap.insert( CharacterMap::value_type( index, glyph));
+		return glyph;
+	}
+	else
+	{
+		return result->second;
+	}
+
+}