#include <cairo/cairo.h>
-struct outp_driver *xr_create_driver (cairo_t *);
+struct chart_item;
+struct output_item;
+
+/* Used by PSPPIRE to render in the GUI. */
+struct xr_driver *xr_create_driver (cairo_t *);
+struct xr_rendering *xr_rendering_create (struct xr_driver *,
+ const struct output_item *,
+ cairo_t *);
+void xr_rendering_measure (struct xr_rendering *, int *w, int *h);
+void xr_rendering_draw (struct xr_rendering *, cairo_t *);
+
+/* Render charts with Cairo. */
+void xr_draw_chart (const struct chart_item *, cairo_t *,
+ double x, double y, double width, double height);
+char *xr_draw_png_chart (const struct chart_item *,
+ const char *file_name_template, int number);
#endif /* output/cairo.h */