Abstract: A device that is not necessarily high in performance, includes: a standard information obtaining unit configured to obtain standard information including a type of drawing process that could be used for computer graphics and a feature of the shape of polygon; a drawing information obtaining unit configured to obtain drawing information including information indicating the type of drawing process used for the actual computer graphics and information indicating the shape of polygon; a simplification judging unit configured to judge whether the type of the drawing process and the shape of the polygon indicated by the drawing information satisfy the standard indicated by the drawing standard information; a polygon simplifying unit configured to simplify the polygon by reducing vertices composing the polygon when said simplification judging unit judges that the standard is satisfied; and a drawing unit configured to execute computer graphics process using the polygon whose vertices are reduced, in order to achieve