static RuntimeTypeModel GetProtobufModel()
{
if (_pbModel == null) {
_pbModel = TypeModel.Create();
_pbModel.AllowParseableTypes=true;
_pbModel.Add(typeof(Font), false).SetSurrogate(typeof(ProtoFont));
_pbModel.Add(typeof(Color), false).SetSurrogate(typeof(ProtoColor));
_pbModel.Add(typeof(StringFormat), false).SetSurrogate(typeof(ProtoStringFormat));
_pbModel.Add(typeof(Point<float>), true).Add("X", "Y");
_pbModel.Add(typeof(DrawStyle), true).AddSubType(100, typeof(DiagramDrawStyle));
_pbModel[typeof(BoundingBox<float>)].Add("X1", "X2", "Y1", "Y2");
_pbModel[typeof(BoundingBox<float>)].UseConstructor = false;
Debug.WriteLine(_pbModel.GetSchema(typeof(DiagramDocumentCore)));
}
return _pbModel;
}