+ template<typename T>
+ class RegisteredLoader: public RegisterBase
+ {
+ public:
+ unsigned get_signature_size() const override { return T::get_signature_size(); }
+ bool detect(const std::string &s) const override { return T::detect(s); }
+ ImageLoader *create(IO::Seekable &io) const override { return new T(io); }
+ };
+
+ struct Registry
+ {
+ std::vector<RegisterBase *> loaders;
+ bool changed = false;