- ImageFormat input_format, output_format;
- std::vector<Effect *> effects, unexpanded_effects;
- std::map<Effect *, std::string> effect_ids;
- std::map<Effect *, GLuint> effect_output_textures;
- std::map<Effect *, std::vector<Effect *> > outgoing_links;
- std::map<Effect *, std::vector<Effect *> > incoming_links;
- Effect *last_added_effect;