void AddSystemFontToCache(const char* fontName, const int& fontStyle)
{
    NSString *nsFontName = [NSString stringWithCString:fontName encoding:NSASCIIStringEncoding];
    NSDictionary *nsFontsDict = [NSDictionary dictionaryWithContentsOfFile:@"/System/Library/Fonts/CGFontCache.plist"];
    NSDictionary *nsTraitsDict = [nsFontsDict valueForKey:@"TraitMappings"];
    NSDictionary *nsMappingDict = [nsTraitsDict valueForKey:nsFontName];
    NSDictionary *nsFaceNamesDict = [nsFontsDict valueForKey:@"Names"];
    NSString* nsFacePath = [nsFaceNamesDict valueForKey:[nsMappingDict valueForKey:nsFontStyle]];
    // This function uses FT_New_Face to read the font
    AddFontToCache(fontName, [nsFacePath cStringUsingEncoding:NSASCIIStringEncoding]);
}