A white heat-curable silicone resin composition comprising a heat-curable organopolysiloxane, a white pigment, an inorganic filler, and a condensation catalyst cures into a white uniform product having heat resistance, light resistance and minimal yellowing. A rendering device may obtain map data, which may include one or more shapes described by vector graphics data. The cap and seat have respectively a first fastening portion and a second fastening portion formed in a mating convex and concave fashion corresponding to the coupling surface.