- o -
- O : sf::Keyboard
- Ok : sf::Ftp::Response , sf::Http::Response
- One : sf::BlendMode
- OneMinusDstAlpha : sf::BlendMode
- OneMinusDstColor : sf::BlendMode
- OneMinusSrcAlpha : sf::BlendMode
- OneMinusSrcColor : sf::BlendMode
- OpeningDataConnection : sf::Ftp::Response
- Orientation : sf::Sensor