+\f
+void
+xr_draw_chart (const struct chart_item *chart_item, cairo_t *cr,
+ double width, double height)
+{
+ struct xrchart_geometry geom;
+
+ cairo_save (cr);
+ cairo_translate (cr, 0, height);
+ cairo_scale (cr, 1.0, -1.0);
+ xrchart_geometry_init (cr, &geom, width, height);
+ if (is_boxplot (chart_item))
+ xrchart_draw_boxplot (chart_item, cr, &geom);
+ else if (is_histogram_chart (chart_item))
+ xrchart_draw_histogram (chart_item, cr, &geom);
+ else if (is_np_plot_chart (chart_item))
+ xrchart_draw_np_plot (chart_item, cr, &geom);
+ else if (is_piechart (chart_item))
+ xrchart_draw_piechart (chart_item, cr, &geom);
+ else if (is_barchart (chart_item))
+ xrchart_draw_barchart (chart_item, cr, &geom);
+ else if (is_roc_chart (chart_item))
+ xrchart_draw_roc (chart_item, cr, &geom);
+ else if (is_scree (chart_item))
+ xrchart_draw_scree (chart_item, cr, &geom);
+ else if (is_spreadlevel_plot_chart (chart_item))
+ xrchart_draw_spreadlevel (chart_item, cr, &geom);
+ else if (is_scatterplot_chart (chart_item))
+ xrchart_draw_scatterplot (chart_item, cr, &geom);
+ else
+ NOT_REACHED ();
+ xrchart_geometry_free (cr, &geom);
+
+ cairo_restore (cr);
+}
+
+char *
+xr_draw_png_chart (const struct chart_item *item,
+ const char *file_name_template, int number,
+ const struct cell_color *fg,
+ const struct cell_color *bg)
+{
+ const int width = 640;
+ const int length = 480;
+
+ cairo_surface_t *surface;
+ cairo_status_t status;
+ const char *number_pos;
+ char *file_name;
+ cairo_t *cr;
+
+ number_pos = strchr (file_name_template, '#');
+ if (number_pos != NULL)
+ file_name = xasprintf ("%.*s%d%s.png", (int) (number_pos - file_name_template),
+ file_name_template, number, number_pos + 1);
+ else
+ file_name = xasprintf ("%s.png", file_name_template);
+
+ surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, length);
+ cr = cairo_create (surface);
+
+ cairo_set_source_rgb (cr, bg->r / 255.0, bg->g / 255.0, bg->b / 255.0);
+ cairo_paint (cr);
+
+ cairo_set_source_rgb (cr, fg->r / 255.0, fg->g / 255.0, fg->b / 255.0);
+
+ xr_draw_chart (item, cr, width, length);
+
+ status = cairo_surface_write_to_png (surface, file_name);
+ if (status != CAIRO_STATUS_SUCCESS)
+ msg (ME, _("error writing output file `%s': %s"),
+ file_name, cairo_status_to_string (status));
+
+ cairo_destroy (cr);
+ cairo_surface_destroy (surface);
+
+ return file_name;
+}
+
+
+char *
+xr_draw_eps_chart (const struct chart_item *item,
+ const char *file_name_template, int number,
+ const struct cell_color *fg,
+ const struct cell_color *bg)
+{
+ const int width = 640;
+ const int length = 480;
+
+ cairo_surface_t *surface;
+ const char *number_pos;
+ char *file_name;
+ cairo_t *cr;
+
+ number_pos = strchr (file_name_template, '#');
+ if (number_pos != NULL)
+ file_name = xasprintf ("%.*s%d%s.eps", (int) (number_pos - file_name_template),
+ file_name_template, number, number_pos + 1);
+ else
+ file_name = xasprintf ("%s.eps", file_name_template);
+
+ surface = cairo_ps_surface_create (file_name, width, length);
+ cairo_ps_surface_set_eps (surface, true);
+ cr = cairo_create (surface);
+
+ cairo_set_source_rgb (cr, bg->r / 255.0, bg->g / 255.0, bg->b / 255.0);
+ cairo_paint (cr);
+
+ cairo_set_source_rgb (cr, fg->r / 255.0, fg->g / 255.0, fg->b / 255.0);
+
+ xr_draw_chart (item, cr, width, length);
+
+ cairo_destroy (cr);
+ cairo_surface_destroy (surface);
+
+ return file_name;
+}