-struct chart
- {
- const struct chart_class *class;
- int ref_cnt;
- };
-
-void chart_init (struct chart *, const struct chart_class *);
-bool chart_create_file (const char *type, const char *file_name_tmpl,
- int number, plPlotterParams *,
- char **file_namep, plPlotter **lpp);
-
-void chart_geometry_init (plPlotter *, struct chart_geometry *,
- double width, double length);
-void chart_geometry_free (plPlotter *);
-
-void chart_draw (const struct chart *, plPlotter *, struct chart_geometry *);