+struct xr_rendering *
+xr_rendering_create (struct xr_driver *xr, const struct output_item *item,
+ cairo_t *cr)
+{
+ struct xr_rendering *r = NULL;
+
+ if (is_text_item (item))
+ r = xr_rendering_create_text (xr, text_item_get_text (to_text_item (item)),
+ cr);
+ else if (is_message_item (item))
+ {
+ const struct message_item *message_item = to_message_item (item);
+ const struct msg *msg = message_item_get_msg (message_item);
+ char *s = msg_to_string (msg, NULL);
+ r = xr_rendering_create_text (xr, s, cr);
+ free (s);
+ }
+ else if (is_table_item (item))
+ {
+ r = xzalloc (sizeof *r);
+ r->xr = xr;
+ xr_set_cairo (xr, cr);
+ r->page = xr_render_table_item (xr, to_table_item (item),
+ &r->title_height);
+ }
+ else if (is_chart_item (item))
+ {
+ r = xzalloc (sizeof *r);
+ r->chart = to_chart_item (output_item_ref (item));
+ }
+
+ return r;
+}
+
+void
+xr_rendering_measure (struct xr_rendering *r, int *w, int *h)
+{
+ if (r->chart == NULL)
+ {
+ *w = render_page_get_size (r->page, H) / 1024;
+ *h = (render_page_get_size (r->page, V) + r->title_height) / 1024;
+ }
+ else
+ {
+ *w = CHART_WIDTH;
+ *h = CHART_HEIGHT;
+ }
+}
+
+void
+xr_rendering_draw (struct xr_rendering *r, cairo_t *cr)
+{
+ if (r->chart == NULL)
+ {
+ struct xr_driver *xr = r->xr;
+
+ xr_set_cairo (xr, cr);
+ xr->y = 0;
+ render_page_draw (r->page);
+ }
+ else
+ xr_draw_chart (r->chart, cr, 0, 0, CHART_WIDTH, CHART_HEIGHT);
+}
+
+void
+xr_draw_chart (const struct chart_item *chart_item, cairo_t *cr,
+ double x, double y, double width, double height)
+{
+ struct xrchart_geometry geom;
+
+ cairo_save (cr);
+ cairo_translate (cr, x, y + 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_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
+ 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 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", (int) (number_pos - file_name_template),
+ file_name_template, number, number_pos + 1);
+ else
+ file_name = xstrdup (file_name_template);
+
+ surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, length);
+ cr = cairo_create (surface);
+
+ cairo_save (cr);
+ cairo_set_source_rgb (cr, 1.0, 1.0, 1.0);
+ cairo_rectangle (cr, 0, 0, width, length);
+ cairo_fill (cr);
+ cairo_restore (cr);
+
+ cairo_set_source_rgb (cr, 0.0, 0.0, 0.0);
+
+ xr_draw_chart (item, cr, 0.0, 0.0, width, length);
+
+ status = cairo_surface_write_to_png (surface, file_name);
+ if (status != CAIRO_STATUS_SUCCESS)
+ error (0, 0, _("error writing output file \"%s\": %s"),
+ file_name, cairo_status_to_string (status));
+
+ cairo_destroy (cr);
+ cairo_surface_destroy (surface);
+
+ return file_name;
+}
+\f
+struct xr_table_state
+ {
+ struct xr_render_fsm fsm;
+ struct table_item *table_item;
+ struct render_break x_break;
+ struct render_break y_break;
+ int caption_height;
+ };
+
+static bool
+xr_table_render (struct xr_render_fsm *fsm, struct xr_driver *xr)
+{
+ struct xr_table_state *ts = UP_CAST (fsm, struct xr_table_state, fsm);
+
+ for (;;)
+ {
+ struct render_page *y_slice;
+ int space;
+
+ while (!render_break_has_next (&ts->y_break))
+ {
+ struct render_page *x_slice;
+
+ render_break_destroy (&ts->y_break);
+ if (!render_break_has_next (&ts->x_break))
+ return false;
+
+ x_slice = render_break_next (&ts->x_break, xr->width);
+ render_break_init (&ts->y_break, x_slice, V);
+ }
+
+ space = xr->length - xr->y;
+ if (render_break_next_size (&ts->y_break) > space)
+ {
+ assert (xr->y > 0);
+ return true;
+ }
+
+ y_slice = render_break_next (&ts->y_break, space);
+ if (ts->caption_height)
+ {
+ if (xr->cairo)
+ {
+ struct table_cell cell;
+ int bb[TABLE_N_AXES][2];
+
+ xr_init_caption_cell (table_item_get_caption (ts->table_item),
+ &cell);
+ bb[H][0] = 0;
+ bb[H][1] = xr->width;
+ bb[V][0] = 0;
+ bb[V][1] = ts->caption_height;
+ xr_draw_cell (xr, &cell, bb, bb);
+ }
+ xr->y += ts->caption_height;
+ ts->caption_height = 0;
+ }
+
+ if (xr->cairo)
+ render_page_draw (y_slice);
+ xr->y += render_page_get_size (y_slice, V);
+ render_page_unref (y_slice);
+ }
+}
+
+static void
+xr_table_destroy (struct xr_render_fsm *fsm)
+{
+ struct xr_table_state *ts = UP_CAST (fsm, struct xr_table_state, fsm);
+
+ table_item_unref (ts->table_item);
+ render_break_destroy (&ts->x_break);
+ render_break_destroy (&ts->y_break);
+ free (ts);
+}
+
+static struct xr_render_fsm *
+xr_render_table (struct xr_driver *xr, const struct table_item *table_item)
+{
+ struct xr_table_state *ts;
+ struct render_page *page;
+
+ ts = xmalloc (sizeof *ts);
+ ts->fsm.render = xr_table_render;
+ ts->fsm.destroy = xr_table_destroy;
+ ts->table_item = table_item_ref (table_item);
+
+ if (xr->y > 0)
+ xr->y += xr->font_height;
+
+ page = xr_render_table_item (xr, table_item, &ts->caption_height);
+ xr->params->size[V] = xr->length - ts->caption_height;
+
+ render_break_init (&ts->x_break, page, H);
+ render_break_init_empty (&ts->y_break);
+
+ return &ts->fsm;
+}
+\f
+struct xr_chart_state
+ {
+ struct xr_render_fsm fsm;
+ struct chart_item *chart_item;
+ };
+
+static bool
+xr_chart_render (struct xr_render_fsm *fsm, struct xr_driver *xr)
+{
+ struct xr_chart_state *cs = UP_CAST (fsm, struct xr_chart_state, fsm);
+
+ if (xr->y > 0)
+ return true;
+
+ if (xr->cairo != NULL)
+ xr_draw_chart (cs->chart_item, xr->cairo, 0.0, 0.0,
+ xr_to_pt (xr->width), xr_to_pt (xr->length));
+ xr->y = xr->length;
+
+ return false;
+}
+
+static void
+xr_chart_destroy (struct xr_render_fsm *fsm)
+{
+ struct xr_chart_state *cs = UP_CAST (fsm, struct xr_chart_state, fsm);
+
+ chart_item_unref (cs->chart_item);
+ free (cs);
+}
+
+static struct xr_render_fsm *
+xr_render_chart (const struct chart_item *chart_item)
+{
+ struct xr_chart_state *cs;
+
+ cs = xmalloc (sizeof *cs);
+ cs->fsm.render = xr_chart_render;
+ cs->fsm.destroy = xr_chart_destroy;
+ cs->chart_item = chart_item_ref (chart_item);
+
+ return &cs->fsm;
+}
+\f
+static bool
+xr_eject_render (struct xr_render_fsm *fsm UNUSED, struct xr_driver *xr)
+{
+ return xr->y > 0;
+}
+
+static void
+xr_eject_destroy (struct xr_render_fsm *fsm UNUSED)
+{
+ /* Nothing to do. */
+}
+
+static struct xr_render_fsm *
+xr_render_eject (void)
+{
+ static struct xr_render_fsm eject_renderer =
+ {
+ xr_eject_render,
+ xr_eject_destroy
+ };
+
+ return &eject_renderer;
+}
+\f
+static struct xr_render_fsm *
+xr_create_text_renderer (struct xr_driver *xr, const char *text)
+{
+ struct table_item *table_item;
+ struct xr_render_fsm *fsm;
+
+ table_item = table_item_create (table_from_string (TAB_LEFT, text), NULL);
+ fsm = xr_render_table (xr, table_item);
+ table_item_unref (table_item);
+
+ return fsm;
+}
+
+static struct xr_render_fsm *
+xr_render_text (struct xr_driver *xr, const struct text_item *text_item)
+{
+ enum text_item_type type = text_item_get_type (text_item);
+ const char *text = text_item_get_text (text_item);
+
+ switch (type)
+ {
+ case TEXT_ITEM_TITLE:
+ free (xr->title);
+ xr->title = xstrdup (text);
+ draw_headers (xr);
+ break;
+
+ case TEXT_ITEM_SUBTITLE:
+ free (xr->subtitle);
+ xr->subtitle = xstrdup (text);
+ draw_headers (xr);
+ break;
+
+ case TEXT_ITEM_COMMAND_CLOSE:
+ break;
+
+ case TEXT_ITEM_BLANK_LINE:
+ if (xr->y > 0)
+ xr->y += xr->font_height;
+ break;
+
+ case TEXT_ITEM_EJECT_PAGE:
+ if (xr->y > 0)
+ return xr_render_eject ();
+ break;
+
+ default:
+ return xr_create_text_renderer (xr, text);
+ }
+
+ return NULL;
+}
+
+static struct xr_render_fsm *
+xr_render_message (struct xr_driver *xr,
+ const struct message_item *message_item)
+{
+ const struct msg *msg = message_item_get_msg (message_item);
+ struct xr_render_fsm *fsm;
+ char *s;
+
+ s = msg_to_string (msg, xr->command_name);
+ fsm = xr_create_text_renderer (xr, s);
+ free (s);
+
+ return fsm;
+}
+
+static struct xr_render_fsm *
+xr_render_output_item (struct xr_driver *xr,
+ const struct output_item *output_item)
+{
+ if (is_table_item (output_item))
+ return xr_render_table (xr, to_table_item (output_item));
+ else if (is_chart_item (output_item))
+ return xr_render_chart (to_chart_item (output_item));
+ else if (is_text_item (output_item))
+ return xr_render_text (xr, to_text_item (output_item));
+ else if (is_message_item (output_item))
+ return xr_render_message (xr, to_message_item (output_item));
+ else
+ return NULL;
+}