double width, gfx_color_t color,
double dash_on, double dash_off);
/* create a new area */
gfx_node_t *gfx_new_area (gfx_canvas_t *canvas,
double width, gfx_color_t color,
double dash_on, double dash_off);
/* create a new area */
gfx_node_t *gfx_new_area (gfx_canvas_t *canvas,