1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation, either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19 #include "output/cairo.h"
21 #include "libpspp/assertion.h"
22 #include "libpspp/cast.h"
23 #include "libpspp/message.h"
24 #include "libpspp/start-date.h"
25 #include "libpspp/str.h"
26 #include "libpspp/string-map.h"
27 #include "libpspp/version.h"
28 #include "data/file-handle-def.h"
29 #include "output/cairo-chart.h"
30 #include "output/chart-item-provider.h"
31 #include "output/charts/boxplot.h"
32 #include "output/charts/np-plot.h"
33 #include "output/charts/piechart.h"
34 #include "output/charts/barchart.h"
35 #include "output/charts/plot-hist.h"
36 #include "output/charts/roc-chart.h"
37 #include "output/charts/spreadlevel-plot.h"
38 #include "output/charts/scree.h"
39 #include "output/charts/scatterplot.h"
40 #include "output/driver-provider.h"
41 #include "output/message-item.h"
42 #include "output/options.h"
43 #include "output/render.h"
44 #include "output/tab.h"
45 #include "output/table-item.h"
46 #include "output/table.h"
47 #include "output/text-item.h"
49 #include <cairo/cairo-pdf.h>
50 #include <cairo/cairo-ps.h>
51 #include <cairo/cairo-svg.h>
52 #include <cairo/cairo.h>
54 #include <pango/pango-font.h>
55 #include <pango/pango-layout.h>
56 #include <pango/pango.h>
57 #include <pango/pangocairo.h>
60 #include "gl/c-strcase.h"
61 #include "gl/intprops.h"
62 #include "gl/minmax.h"
63 #include "gl/xalloc.h"
66 #define _(msgid) gettext (msgid)
68 /* This file uses TABLE_HORZ and TABLE_VERT enough to warrant abbreviating. */
72 /* The unit used for internal measurements is inch/(72 * XR_POINT). */
73 #define XR_POINT PANGO_SCALE
75 /* Conversions to and from points. */
79 return x / (double) XR_POINT;
82 /* Conversion from 1/96" units ("pixels") to Cairo/Pango units. */
86 return x * (PANGO_SCALE * 72 / 96);
100 XR_FONT_PROPORTIONAL,
106 /* A font for use with Cairo. */
109 PangoFontDescription *desc;
113 /* An output item whose rendering is in progress. */
116 /* Renders as much of itself as it can on the current page. Returns true
117 if rendering is complete, false if the output item needs another
119 bool (*render) (struct xr_render_fsm *, struct xr_driver *);
121 /* Destroys the output item. */
122 void (*destroy) (struct xr_render_fsm *);
125 /* Cairo output driver. */
128 struct output_driver driver;
130 /* User parameters. */
131 struct xr_font fonts[XR_N_FONTS];
133 int width; /* Page width minus margins. */
134 int length; /* Page length minus margins and header. */
136 int left_margin; /* Left margin in inch/(72 * XR_POINT). */
137 int right_margin; /* Right margin in inch/(72 * XR_POINT). */
138 int top_margin; /* Top margin in inch/(72 * XR_POINT). */
139 int bottom_margin; /* Bottom margin in inch/(72 * XR_POINT). */
141 int line_space; /* Space between lines. */
142 int line_width; /* Width of lines. */
144 int min_break[TABLE_N_AXES]; /* Min cell size to break across pages. */
146 struct xr_color bg; /* Background color */
147 struct xr_color fg; /* Foreground color */
149 /* Internal state. */
150 struct render_params *params;
151 int char_width, char_height;
156 int page_number; /* Current page number. */
158 struct xr_render_fsm *fsm;
162 static const struct output_driver_class cairo_driver_class;
164 static void xr_driver_destroy_fsm (struct xr_driver *);
165 static void xr_driver_run_fsm (struct xr_driver *);
167 static void xr_draw_line (void *, int bb[TABLE_N_AXES][2],
168 enum render_line_style styles[TABLE_N_AXES][2]);
169 static void xr_measure_cell_width (void *, const struct table_cell *,
171 static int xr_measure_cell_height (void *, const struct table_cell *,
173 static void xr_draw_cell (void *, const struct table_cell *,
174 int bb[TABLE_N_AXES][2],
175 int spill[TABLE_N_AXES][2],
176 int clip[TABLE_N_AXES][2]);
177 static int xr_adjust_break (void *, const struct table_cell *,
178 int width, int height);
180 static struct xr_render_fsm *xr_render_output_item (
181 struct xr_driver *, const struct output_item *);
183 /* Output driver basics. */
185 static struct xr_driver *
186 xr_driver_cast (struct output_driver *driver)
188 assert (driver->class == &cairo_driver_class);
189 return UP_CAST (driver, struct xr_driver, driver);
192 static struct driver_option *
193 opt (struct output_driver *d, struct string_map *options, const char *key,
194 const char *default_value)
196 return driver_option_get (d, options, key, default_value);
199 /* Parse color information specified by KEY into {RED,GREEN,BLUE}.
200 Currently, the input string must be of the form "#RRRRGGGGBBBB"
201 Future implementations might allow things like "yellow" and
202 "sky-blue-ultra-brown"
205 parse_color (struct output_driver *d, struct string_map *options,
206 const char *key, const char *default_value,
207 struct xr_color *color)
209 int red, green, blue;
210 char *string = parse_string (opt (d, options, key, default_value));
212 if (3 != sscanf (string, "#%04x%04x%04x", &red, &green, &blue))
214 /* If the parsed option string fails, then try the default value */
215 if ( 3 != sscanf (default_value, "#%04x%04x%04x", &red, &green, &blue))
217 /* ... and if that fails set everything to zero */
218 red = green = blue = 0;
224 /* Convert 16 bit ints to float */
225 color->red = red / (double) 0xFFFF;
226 color->green = green / (double) 0xFFFF;
227 color->blue = blue / (double) 0xFFFF;
230 static PangoFontDescription *
231 parse_font (const char *font, int default_size, bool bold, bool italic)
233 if (!c_strcasecmp (font, "Monospaced"))
236 PangoFontDescription *desc = pango_font_description_from_string (font);
240 /* If the font description didn't include an explicit font size, then set it
241 to DEFAULT_SIZE, which is in inch/72000 units. */
242 if (!(pango_font_description_get_set_fields (desc) & PANGO_FONT_MASK_SIZE))
243 pango_font_description_set_size (desc,
244 (default_size / 1000.0) * PANGO_SCALE);
246 pango_font_description_set_weight (desc, (bold
248 : PANGO_WEIGHT_NORMAL));
249 pango_font_description_set_style (desc, (italic
251 : PANGO_STYLE_NORMAL));
256 static PangoFontDescription *
257 parse_font_option (struct output_driver *d, struct string_map *options,
258 const char *key, const char *default_value,
259 int default_size, bool bold, bool italic)
261 char *string = parse_string (opt (d, options, key, default_value));
262 PangoFontDescription *desc = parse_font (string, default_size, bold, italic);
265 msg (MW, _("`%s': bad font specification"), string);
267 /* Fall back to DEFAULT_VALUE, which had better be a valid font
269 desc = parse_font (default_value, default_size, bold, italic);
270 assert (desc != NULL);
278 apply_options (struct xr_driver *xr, struct string_map *o)
280 struct output_driver *d = &xr->driver;
282 /* In inch/72000 units used by parse_paper_size() and parse_dimension(). */
283 int left_margin, right_margin;
284 int top_margin, bottom_margin;
285 int paper_width, paper_length;
287 int min_break[TABLE_N_AXES];
289 /* Scale factor from inch/72000 to inch/(72 * XR_POINT). */
290 const double scale = XR_POINT / 1000.;
294 for (i = 0; i < XR_N_FONTS; i++)
296 struct xr_font *font = &xr->fonts[i];
298 if (font->desc != NULL)
299 pango_font_description_free (font->desc);
302 font_size = parse_int (opt (d, o, "font-size", "10000"), 1000, 1000000);
303 xr->fonts[XR_FONT_FIXED].desc = parse_font_option
304 (d, o, "fixed-font", "monospace", font_size, false, false);
305 xr->fonts[XR_FONT_PROPORTIONAL].desc = parse_font_option (
306 d, o, "prop-font", "sans serif", font_size, false, false);
307 xr->fonts[XR_FONT_EMPHASIS].desc = parse_font_option (
308 d, o, "emph-font", "sans serif", font_size, false, true);
310 xr->line_space = XR_POINT;
311 xr->line_width = XR_POINT / 2;
314 parse_color (d, o, "background-color", "#FFFFFFFFFFFF", &xr->bg);
315 parse_color (d, o, "foreground-color", "#000000000000", &xr->fg);
317 /* Get dimensions. */
318 parse_paper_size (opt (d, o, "paper-size", ""), &paper_width, &paper_length);
319 left_margin = parse_dimension (opt (d, o, "left-margin", ".5in"));
320 right_margin = parse_dimension (opt (d, o, "right-margin", ".5in"));
321 top_margin = parse_dimension (opt (d, o, "top-margin", ".5in"));
322 bottom_margin = parse_dimension (opt (d, o, "bottom-margin", ".5in"));
324 min_break[H] = parse_dimension (opt (d, o, "min-hbreak", NULL)) * scale;
325 min_break[V] = parse_dimension (opt (d, o, "min-vbreak", NULL)) * scale;
327 /* Convert to inch/(XR_POINT * 72). */
328 xr->left_margin = left_margin * scale;
329 xr->right_margin = right_margin * scale;
330 xr->top_margin = top_margin * scale;
331 xr->bottom_margin = bottom_margin * scale;
332 xr->width = (paper_width - left_margin - right_margin) * scale;
333 xr->length = (paper_length - top_margin - bottom_margin) * scale;
334 xr->min_break[H] = min_break[H] >= 0 ? min_break[H] : xr->width / 2;
335 xr->min_break[V] = min_break[V] >= 0 ? min_break[V] : xr->length / 2;
338 static struct xr_driver *
339 xr_allocate (const char *name, int device_type, struct string_map *o)
341 struct xr_driver *xr = xzalloc (sizeof *xr);
342 struct output_driver *d = &xr->driver;
344 output_driver_init (d, &cairo_driver_class, name, device_type);
346 apply_options (xr, o);
352 pango_to_xr (int pango)
354 return (XR_POINT != PANGO_SCALE
355 ? ceil (pango * (1. * XR_POINT / PANGO_SCALE))
362 return (XR_POINT != PANGO_SCALE
363 ? ceil (xr * (1. / XR_POINT * PANGO_SCALE))
368 xr_set_cairo (struct xr_driver *xr, cairo_t *cairo)
374 cairo_set_line_width (xr->cairo, xr_to_pt (xr->line_width));
378 for (i = 0; i < XR_N_FONTS; i++)
380 struct xr_font *font = &xr->fonts[i];
381 int char_width, char_height;
383 font->layout = pango_cairo_create_layout (cairo);
384 pango_layout_set_font_description (font->layout, font->desc);
386 pango_layout_set_text (font->layout, "0", 1);
387 pango_layout_get_size (font->layout, &char_width, &char_height);
388 xr->char_width = MAX (xr->char_width, pango_to_xr (char_width));
389 xr->char_height = MAX (xr->char_height, pango_to_xr (char_height));
392 if (xr->params == NULL)
394 xr->params = xmalloc (sizeof *xr->params);
395 xr->params->draw_line = xr_draw_line;
396 xr->params->measure_cell_width = xr_measure_cell_width;
397 xr->params->measure_cell_height = xr_measure_cell_height;
398 xr->params->adjust_break = xr_adjust_break;
399 xr->params->draw_cell = xr_draw_cell;
400 xr->params->aux = xr;
401 xr->params->size[H] = xr->width;
402 xr->params->size[V] = xr->length;
403 xr->params->font_size[H] = xr->char_width;
404 xr->params->font_size[V] = xr->char_height;
406 int lw = xr->line_width;
407 int ls = xr->line_space;
408 for (i = 0; i < TABLE_N_AXES; i++)
410 xr->params->line_widths[i][RENDER_LINE_NONE] = 0;
411 xr->params->line_widths[i][RENDER_LINE_SINGLE] = lw;
412 xr->params->line_widths[i][RENDER_LINE_DASHED] = lw;
413 xr->params->line_widths[i][RENDER_LINE_THICK] = lw * 2;
414 xr->params->line_widths[i][RENDER_LINE_THIN] = lw / 2;
415 xr->params->line_widths[i][RENDER_LINE_DOUBLE] = 2 * lw + ls;
418 for (i = 0; i < TABLE_N_AXES; i++)
419 xr->params->min_break[i] = xr->min_break[i];
420 xr->params->supports_margins = true;
423 cairo_set_source_rgb (xr->cairo, xr->fg.red, xr->fg.green, xr->fg.blue);
428 static struct output_driver *
429 xr_create (const char *file_name, enum settings_output_devices device_type,
430 struct string_map *o, enum xr_output_type file_type)
432 enum { MIN_WIDTH = 3, MIN_LENGTH = 3 };
433 struct xr_driver *xr;
434 cairo_surface_t *surface;
435 cairo_status_t status;
436 double width_pt, length_pt;
438 xr = xr_allocate (file_name, device_type, o);
440 width_pt = xr_to_pt (xr->width + xr->left_margin + xr->right_margin);
441 length_pt = xr_to_pt (xr->length + xr->top_margin + xr->bottom_margin);
442 if (file_type == XR_PDF)
443 surface = cairo_pdf_surface_create (file_name, width_pt, length_pt);
444 else if (file_type == XR_PS)
445 surface = cairo_ps_surface_create (file_name, width_pt, length_pt);
446 else if (file_type == XR_SVG)
447 surface = cairo_svg_surface_create (file_name, width_pt, length_pt);
451 status = cairo_surface_status (surface);
452 if (status != CAIRO_STATUS_SUCCESS)
454 msg (ME, _("error opening output file `%s': %s"),
455 file_name, cairo_status_to_string (status));
456 cairo_surface_destroy (surface);
460 xr->cairo = cairo_create (surface);
461 cairo_surface_destroy (surface);
463 if (!xr_set_cairo (xr, xr->cairo))
466 cairo_save (xr->cairo);
467 xr_driver_next_page (xr, xr->cairo);
469 if (xr->width / xr->char_width < MIN_WIDTH)
471 msg (ME, _("The defined page is not wide enough to hold at least %d "
472 "characters in the default font. In fact, there's only "
473 "room for %d characters."),
475 xr->width / xr->char_width);
479 if (xr->length / xr->char_height < MIN_LENGTH)
481 msg (ME, _("The defined page is not long enough to hold at least %d "
482 "lines in the default font. In fact, there's only "
483 "room for %d lines."),
485 xr->length / xr->char_height);
492 output_driver_destroy (&xr->driver);
496 static struct output_driver *
497 xr_pdf_create (struct file_handle *fh, enum settings_output_devices device_type,
498 struct string_map *o)
500 struct output_driver *od = xr_create (fh_get_file_name (fh), device_type, o, XR_PDF);
505 static struct output_driver *
506 xr_ps_create (struct file_handle *fh, enum settings_output_devices device_type,
507 struct string_map *o)
509 struct output_driver *od = xr_create (fh_get_file_name (fh), device_type, o, XR_PS);
514 static struct output_driver *
515 xr_svg_create (struct file_handle *fh, enum settings_output_devices device_type,
516 struct string_map *o)
518 struct output_driver *od = xr_create (fh_get_file_name (fh), device_type, o, XR_SVG);
524 xr_destroy (struct output_driver *driver)
526 struct xr_driver *xr = xr_driver_cast (driver);
529 xr_driver_destroy_fsm (xr);
531 if (xr->cairo != NULL)
533 cairo_status_t status;
535 cairo_surface_finish (cairo_get_target (xr->cairo));
536 status = cairo_status (xr->cairo);
537 if (status != CAIRO_STATUS_SUCCESS)
538 msg (ME, _("error drawing output for %s driver: %s"),
539 output_driver_get_name (driver),
540 cairo_status_to_string (status));
541 cairo_destroy (xr->cairo);
544 for (i = 0; i < XR_N_FONTS; i++)
546 struct xr_font *font = &xr->fonts[i];
548 if (font->desc != NULL)
549 pango_font_description_free (font->desc);
550 if (font->layout != NULL)
551 g_object_unref (font->layout);
559 xr_flush (struct output_driver *driver)
561 struct xr_driver *xr = xr_driver_cast (driver);
563 cairo_surface_flush (cairo_get_target (xr->cairo));
567 xr_submit (struct output_driver *driver, const struct output_item *output_item)
569 struct xr_driver *xr = xr_driver_cast (driver);
571 xr_driver_output_item (xr, output_item);
572 while (xr_driver_need_new_page (xr))
574 cairo_restore (xr->cairo);
575 cairo_show_page (xr->cairo);
576 cairo_save (xr->cairo);
577 xr_driver_next_page (xr, xr->cairo);
581 /* Functions for rendering a series of output items to a series of Cairo
582 contexts, with pagination.
584 Used by PSPPIRE for printing, and by the basic Cairo output driver above as
585 its underlying implementation.
587 See the big comment in cairo.h for intended usage. */
589 /* Gives new page CAIRO to XR for output. */
591 xr_driver_next_page (struct xr_driver *xr, cairo_t *cairo)
594 cairo_set_source_rgb (cairo, xr->bg.red, xr->bg.green, xr->bg.blue);
595 cairo_rectangle (cairo, 0, 0, xr->width, xr->length);
597 cairo_restore (cairo);
599 cairo_translate (cairo,
600 xr_to_pt (xr->left_margin),
601 xr_to_pt (xr->top_margin));
606 xr_driver_run_fsm (xr);
609 /* Start rendering OUTPUT_ITEM to XR. Only valid if XR is not in the middle of
610 rendering a previous output item, that is, only if xr_driver_need_new_page()
613 xr_driver_output_item (struct xr_driver *xr,
614 const struct output_item *output_item)
616 assert (xr->fsm == NULL);
617 xr->fsm = xr_render_output_item (xr, output_item);
618 xr_driver_run_fsm (xr);
621 /* Returns true if XR is in the middle of rendering an output item and needs a
622 new page to be appended using xr_driver_next_page() to make progress,
625 xr_driver_need_new_page (const struct xr_driver *xr)
627 return xr->fsm != NULL;
630 /* Returns true if the current page doesn't have any content yet. */
632 xr_driver_is_page_blank (const struct xr_driver *xr)
638 xr_driver_destroy_fsm (struct xr_driver *xr)
642 xr->fsm->destroy (xr->fsm);
648 xr_driver_run_fsm (struct xr_driver *xr)
650 if (xr->fsm != NULL && !xr->fsm->render (xr->fsm, xr))
651 xr_driver_destroy_fsm (xr);
655 xr_layout_cell (struct xr_driver *, const struct table_cell *,
656 int bb[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
657 int *width, int *height, int *brk);
660 dump_line (struct xr_driver *xr, int x0, int y0, int x1, int y1, int style)
662 cairo_new_path (xr->cairo);
663 cairo_set_line_width (
665 xr_to_pt (style == RENDER_LINE_THICK ? xr->line_width * 2
666 : style == RENDER_LINE_THIN ? xr->line_width / 2
668 cairo_move_to (xr->cairo, xr_to_pt (x0 + xr->x), xr_to_pt (y0 + xr->y));
669 cairo_line_to (xr->cairo, xr_to_pt (x1 + xr->x), xr_to_pt (y1 + xr->y));
670 cairo_stroke (xr->cairo);
674 dump_rectangle (struct xr_driver *xr, int x0, int y0, int x1, int y1)
676 cairo_new_path (xr->cairo);
677 cairo_set_line_width (xr->cairo, xr_to_pt (xr->line_width));
678 cairo_move_to (xr->cairo, xr_to_pt (x0 + xr->x), xr_to_pt (y0 + xr->y));
679 cairo_line_to (xr->cairo, xr_to_pt (x1 + xr->x), xr_to_pt (y0 + xr->y));
680 cairo_line_to (xr->cairo, xr_to_pt (x1 + xr->x), xr_to_pt (y1 + xr->y));
681 cairo_line_to (xr->cairo, xr_to_pt (x0 + xr->x), xr_to_pt (y1 + xr->y));
682 cairo_close_path (xr->cairo);
683 cairo_stroke (xr->cairo);
687 fill_rectangle (struct xr_driver *xr, int x0, int y0, int x1, int y1)
689 cairo_new_path (xr->cairo);
690 cairo_set_line_width (xr->cairo, xr_to_pt (xr->line_width));
691 cairo_rectangle (xr->cairo,
692 xr_to_pt (x0 + xr->x), xr_to_pt (y0 + xr->y),
693 xr_to_pt (x1 - x0), xr_to_pt (y1 - y0));
694 cairo_fill (xr->cairo);
697 /* Draws a horizontal line X0...X2 at Y if LEFT says so,
698 shortening it to X0...X1 if SHORTEN is true.
699 Draws a horizontal line X1...X3 at Y if RIGHT says so,
700 shortening it to X2...X3 if SHORTEN is true. */
702 horz_line (struct xr_driver *xr, int x0, int x1, int x2, int x3, int y,
703 enum render_line_style left, enum render_line_style right,
706 if (left != RENDER_LINE_NONE && right != RENDER_LINE_NONE && !shorten)
707 dump_line (xr, x0, y, x3, y, left);
710 if (left != RENDER_LINE_NONE)
711 dump_line (xr, x0, y, shorten ? x1 : x2, y, left);
712 if (right != RENDER_LINE_NONE)
713 dump_line (xr, shorten ? x2 : x1, y, x3, y, right);
717 /* Draws a vertical line Y0...Y2 at X if TOP says so,
718 shortening it to Y0...Y1 if SHORTEN is true.
719 Draws a vertical line Y1...Y3 at X if BOTTOM says so,
720 shortening it to Y2...Y3 if SHORTEN is true. */
722 vert_line (struct xr_driver *xr, int y0, int y1, int y2, int y3, int x,
723 enum render_line_style top, enum render_line_style bottom,
726 if (top != RENDER_LINE_NONE && bottom != RENDER_LINE_NONE && !shorten)
727 dump_line (xr, x, y0, x, y3, top);
730 if (top != RENDER_LINE_NONE)
731 dump_line (xr, x, y0, x, shorten ? y1 : y2, top);
732 if (bottom != RENDER_LINE_NONE)
733 dump_line (xr, x, shorten ? y2 : y1, x, y3, bottom);
738 xr_draw_line (void *xr_, int bb[TABLE_N_AXES][2],
739 enum render_line_style styles[TABLE_N_AXES][2])
741 const int x0 = bb[H][0];
742 const int y0 = bb[V][0];
743 const int x3 = bb[H][1];
744 const int y3 = bb[V][1];
745 const int top = styles[H][0];
746 const int bottom = styles[H][1];
747 const int start_of_line = render_direction_rtl() ? styles[V][1]: styles[V][0];
748 const int end_of_line = render_direction_rtl() ? styles[V][0]: styles[V][1];
750 /* The algorithm here is somewhat subtle, to allow it to handle
751 all the kinds of intersections that we need.
753 Three additional ordinates are assigned along the x axis. The
754 first is xc, midway between x0 and x3. The others are x1 and
755 x2; for a single vertical line these are equal to xc, and for
756 a double vertical line they are the ordinates of the left and
757 right half of the double line.
759 yc, y1, and y2 are assigned similarly along the y axis.
761 The following diagram shows the coordinate system and output
762 for double top and bottom lines, single left line, and no
766 y0 ________________________
772 y1 = y2 = yc |######### # |
777 y3 |________#_____#_______|
779 struct xr_driver *xr = xr_;
781 /* Offset from center of each line in a pair of double lines. */
782 int double_line_ofs = (xr->line_space + xr->line_width) / 2;
784 /* Are the lines along each axis single or double?
785 (It doesn't make sense to have different kinds of line on the
786 same axis, so we don't try to gracefully handle that case.) */
787 bool double_vert = top == RENDER_LINE_DOUBLE || bottom == RENDER_LINE_DOUBLE;
788 bool double_horz = start_of_line == RENDER_LINE_DOUBLE || end_of_line == RENDER_LINE_DOUBLE;
790 /* When horizontal lines are doubled,
791 the left-side line along y1 normally runs from x0 to x2,
792 and the right-side line along y1 from x3 to x1.
793 If the top-side line is also doubled, we shorten the y1 lines,
794 so that the left-side line runs only to x1,
795 and the right-side line only to x2.
796 Otherwise, the horizontal line at y = y1 below would cut off
797 the intersection, which looks ugly:
799 y0 ________________________
804 y1 |######### ########|
807 y2 |######################|
810 y3 |______________________|
811 It is more of a judgment call when the horizontal line is
812 single. We actually choose to cut off the line anyhow, as
813 shown in the first diagram above.
815 bool shorten_y1_lines = top == RENDER_LINE_DOUBLE;
816 bool shorten_y2_lines = bottom == RENDER_LINE_DOUBLE;
817 bool shorten_yc_line = shorten_y1_lines && shorten_y2_lines;
818 int horz_line_ofs = double_vert ? double_line_ofs : 0;
819 int xc = (x0 + x3) / 2;
820 int x1 = xc - horz_line_ofs;
821 int x2 = xc + horz_line_ofs;
823 bool shorten_x1_lines = start_of_line == RENDER_LINE_DOUBLE;
824 bool shorten_x2_lines = end_of_line == RENDER_LINE_DOUBLE;
825 bool shorten_xc_line = shorten_x1_lines && shorten_x2_lines;
826 int vert_line_ofs = double_horz ? double_line_ofs : 0;
827 int yc = (y0 + y3) / 2;
828 int y1 = yc - vert_line_ofs;
829 int y2 = yc + vert_line_ofs;
832 horz_line (xr, x0, x1, x2, x3, yc, start_of_line, end_of_line, shorten_yc_line);
835 horz_line (xr, x0, x1, x2, x3, y1, start_of_line, end_of_line, shorten_y1_lines);
836 horz_line (xr, x0, x1, x2, x3, y2, start_of_line, end_of_line, shorten_y2_lines);
840 vert_line (xr, y0, y1, y2, y3, xc, top, bottom, shorten_xc_line);
843 vert_line (xr, y0, y1, y2, y3, x1, top, bottom, shorten_x1_lines);
844 vert_line (xr, y0, y1, y2, y3, x2, top, bottom, shorten_x2_lines);
849 xr_measure_cell_width (void *xr_, const struct table_cell *cell,
850 int *min_width, int *max_width)
852 struct xr_driver *xr = xr_;
853 int bb[TABLE_N_AXES][2];
854 int clip[TABLE_N_AXES][2];
861 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
862 xr_layout_cell (xr, cell, bb, clip, max_width, &h, NULL);
865 xr_layout_cell (xr, cell, bb, clip, min_width, &h, NULL);
868 *min_width += px_to_xr (cell->style->margin[H][0]
869 + cell->style->margin[H][1]);
871 *max_width += px_to_xr (cell->style->margin[H][0]
872 + cell->style->margin[H][1]);
876 xr_measure_cell_height (void *xr_, const struct table_cell *cell, int width)
878 struct xr_driver *xr = xr_;
879 int bb[TABLE_N_AXES][2];
880 int clip[TABLE_N_AXES][2];
884 bb[H][1] = width - px_to_xr (cell->style->margin[H][0]
885 + cell->style->margin[H][1]);
888 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
889 xr_layout_cell (xr, cell, bb, clip, &w, &h, NULL);
890 h += px_to_xr (cell->style->margin[V][0] + cell->style->margin[V][1]);
894 static void xr_clip (struct xr_driver *, int clip[TABLE_N_AXES][2]);
897 xr_draw_cell (void *xr_, const struct table_cell *cell,
898 int bb[TABLE_N_AXES][2],
899 int spill[TABLE_N_AXES][2],
900 int clip[TABLE_N_AXES][2])
902 struct xr_driver *xr = xr_;
905 cairo_save (xr->cairo);
906 int bg_clip[TABLE_N_AXES][2];
907 for (int axis = 0; axis < TABLE_N_AXES; axis++)
909 bg_clip[axis][0] = clip[axis][0];
910 if (bb[axis][0] == clip[axis][0])
911 bg_clip[axis][0] -= spill[axis][0];
913 bg_clip[axis][1] = clip[axis][1];
914 if (bb[axis][1] == clip[axis][1])
915 bg_clip[axis][1] += spill[axis][1];
917 xr_clip (xr, bg_clip);
918 cairo_set_source_rgb (xr->cairo,
919 cell->style->bg.r / 255.,
920 cell->style->bg.g / 255.,
921 cell->style->bg.b / 255.);
923 bb[H][0] - spill[H][0],
924 bb[V][0] - spill[V][0],
925 bb[H][1] + spill[H][1],
926 bb[V][1] + spill[V][1]);
927 cairo_restore (xr->cairo);
929 cairo_save (xr->cairo);
930 cairo_set_source_rgb (xr->cairo,
931 cell->style->fg.r / 255.,
932 cell->style->fg.g / 255.,
933 cell->style->fg.b / 255.);
935 for (int axis = 0; axis < TABLE_N_AXES; axis++)
937 bb[axis][0] += px_to_xr (cell->style->margin[axis][0]);
938 bb[axis][1] -= px_to_xr (cell->style->margin[axis][1]);
940 if (bb[H][0] < bb[H][1] && bb[V][0] < bb[V][1])
941 xr_layout_cell (xr, cell, bb, clip, &w, &h, &brk);
942 cairo_restore (xr->cairo);
946 xr_adjust_break (void *xr_, const struct table_cell *cell,
947 int width, int height)
949 struct xr_driver *xr = xr_;
950 int bb[TABLE_N_AXES][2];
951 int clip[TABLE_N_AXES][2];
954 if (xr_measure_cell_height (xr_, cell, width) < height)
958 bb[H][1] = width - px_to_xr (cell->style->margin[H][0]
959 + cell->style->margin[H][1]);
963 bb[V][1] = height - px_to_xr (cell->style->margin[V][0]
964 + cell->style->margin[V][1]);
965 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
966 xr_layout_cell (xr, cell, bb, clip, &w, &h, &brk);
971 xr_clip (struct xr_driver *xr, int clip[TABLE_N_AXES][2])
973 if (clip[H][1] != INT_MAX || clip[V][1] != INT_MAX)
975 double x0 = xr_to_pt (clip[H][0] + xr->x);
976 double y0 = xr_to_pt (clip[V][0] + xr->y);
977 double x1 = xr_to_pt (clip[H][1] + xr->x);
978 double y1 = xr_to_pt (clip[V][1] + xr->y);
980 cairo_rectangle (xr->cairo, x0, y0, x1 - x0, y1 - y0);
981 cairo_clip (xr->cairo);
986 add_attr_with_start (PangoAttrList *list, PangoAttribute *attr, guint start_index)
988 attr->start_index = start_index;
989 pango_attr_list_insert (list, attr);
993 xr_layout_cell_text (struct xr_driver *xr,
994 const struct cell_contents *contents,
995 const struct cell_style *style,
996 int bb[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
997 int *widthp, int *brk)
999 unsigned int options = contents->options;
1003 struct xr_font *font = (options & TAB_FIX ? &xr->fonts[XR_FONT_FIXED]
1004 : options & TAB_EMPH ? &xr->fonts[XR_FONT_EMPHASIS]
1005 : &xr->fonts[XR_FONT_PROPORTIONAL]);
1006 struct xr_font local_font;
1009 PangoFontDescription *desc = parse_font (
1011 style->font_size ? style->font_size * 1000 * 72 / 128 : 10000,
1012 style->bold, style->italic);
1015 PangoLayout *layout = pango_cairo_create_layout (xr->cairo);
1016 pango_layout_set_font_description (layout, desc);
1018 local_font.desc = desc;
1019 local_font.layout = layout;
1024 int footnote_adjustment;
1025 if (contents->n_footnotes == 0)
1026 footnote_adjustment = 0;
1027 else if (contents->n_footnotes == 1 && (options & TAB_HALIGN) == TAB_RIGHT)
1029 PangoAttrList *attrs;
1031 const char *marker = contents->footnotes[0]->marker;
1032 pango_layout_set_text (font->layout, marker, strlen (marker));
1034 attrs = pango_attr_list_new ();
1035 pango_attr_list_insert (attrs, pango_attr_rise_new (7000));
1036 pango_layout_set_attributes (font->layout, attrs);
1037 pango_attr_list_unref (attrs);
1039 pango_layout_get_size (font->layout, &w, &h);
1040 footnote_adjustment = MIN (w, px_to_xr (style->margin[H][1]));
1043 footnote_adjustment = px_to_xr (style->margin[H][1]);
1045 length = strlen (contents->text);
1046 if (footnote_adjustment)
1048 PangoAttrList *attrs;
1051 bb[H][1] += footnote_adjustment;
1054 ds_extend (&s, length + contents->n_footnotes * 10);
1055 ds_put_cstr (&s, contents->text);
1056 cell_contents_format_footnote_markers (contents, &s);
1057 pango_layout_set_text (font->layout, ds_cstr (&s), ds_length (&s));
1060 attrs = pango_attr_list_new ();
1061 if (style->underline)
1062 pango_attr_list_insert (attrs, pango_attr_underline_new (
1063 PANGO_UNDERLINE_SINGLE));
1064 add_attr_with_start (attrs, pango_attr_rise_new (7000), length);
1065 add_attr_with_start (
1066 attrs, pango_attr_font_desc_new (font->desc), length);
1067 pango_layout_set_attributes (font->layout, attrs);
1068 pango_attr_list_unref (attrs);
1072 pango_layout_set_text (font->layout, contents->text, -1);
1074 if (style->underline)
1076 PangoAttrList *attrs = pango_attr_list_new ();
1077 pango_attr_list_insert (attrs, pango_attr_underline_new (
1078 PANGO_UNDERLINE_SINGLE));
1079 pango_layout_set_attributes (font->layout, attrs);
1080 pango_attr_list_unref (attrs);
1084 pango_layout_set_alignment (
1086 ((options & TAB_HALIGN) == TAB_RIGHT ? PANGO_ALIGN_RIGHT
1087 : (options & TAB_HALIGN) == TAB_LEFT ? PANGO_ALIGN_LEFT
1088 : PANGO_ALIGN_CENTER));
1089 pango_layout_set_width (
1091 bb[H][1] == INT_MAX ? -1 : xr_to_pango (bb[H][1] - bb[H][0]));
1092 pango_layout_set_wrap (font->layout, PANGO_WRAP_WORD);
1094 if (clip[H][0] != clip[H][1])
1096 cairo_save (xr->cairo);
1098 cairo_translate (xr->cairo,
1099 xr_to_pt (bb[H][0] + xr->x),
1100 xr_to_pt (bb[V][0] + xr->y));
1101 pango_cairo_show_layout (xr->cairo, font->layout);
1103 /* If enabled, this draws a blue rectangle around the extents of each
1104 line of text, which can be rather useful for debugging layout
1108 PangoLayoutIter *iter;
1109 iter = pango_layout_get_iter (font->layout);
1112 PangoRectangle extents;
1114 pango_layout_iter_get_line_extents (iter, &extents, NULL);
1115 cairo_save (xr->cairo);
1116 cairo_set_source_rgb (xr->cairo, 1, 0, 0);
1118 pango_to_xr (extents.x) - xr->x,
1119 pango_to_xr (extents.y) - xr->y,
1120 pango_to_xr (extents.x + extents.width) - xr->x,
1121 pango_to_xr (extents.y + extents.height) - xr->y);
1122 cairo_restore (xr->cairo);
1124 while (pango_layout_iter_next_line (iter));
1125 pango_layout_iter_free (iter);
1128 cairo_restore (xr->cairo);
1131 pango_layout_get_size (font->layout, &w, &h);
1132 w = pango_to_xr (w);
1133 h = pango_to_xr (h);
1136 if (bb[V][0] + h >= bb[V][1])
1138 PangoLayoutIter *iter;
1139 int best UNUSED = 0;
1141 /* Choose a breakpoint between lines instead of in the middle of one. */
1142 iter = pango_layout_get_iter (font->layout);
1145 PangoRectangle extents;
1149 pango_layout_iter_get_line_extents (iter, NULL, &extents);
1150 pango_layout_iter_get_line_yrange (iter, &y0, &y1);
1151 extents.x = pango_to_xr (extents.x);
1152 extents.y = pango_to_xr (y0);
1153 extents.width = pango_to_xr (extents.width);
1154 extents.height = pango_to_xr (y1 - y0);
1155 bottom = bb[V][0] + extents.y + extents.height;
1156 if (bottom < bb[V][1])
1158 if (brk && clip[H][0] != clip[H][1])
1166 while (pango_layout_iter_next_line (iter));
1167 pango_layout_iter_free (iter);
1169 /* If enabled, draws a green line across the chosen breakpoint, which can
1170 be useful for debugging issues with breaking. */
1173 if (best && !xr->nest)
1175 cairo_save (xr->cairo);
1176 cairo_set_source_rgb (xr->cairo, 0, 1, 0);
1177 dump_line (xr, -xr->left_margin, best,
1178 xr->width + xr->right_margin, best,
1179 RENDER_LINE_SINGLE);
1180 cairo_restore (xr->cairo);
1185 pango_layout_set_attributes (font->layout, NULL);
1187 if (font == &local_font)
1189 g_object_unref (G_OBJECT (font->layout));
1190 pango_font_description_free (font->desc);
1193 return bb[V][0] + h;
1197 xr_layout_cell (struct xr_driver *xr, const struct table_cell *cell,
1198 int bb_[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
1199 int *width, int *height, int *brk)
1201 int bb[TABLE_N_AXES][2];
1209 memcpy (bb, bb_, sizeof bb);
1211 /* If enabled, draws a blue rectangle around the cell extents, which can be
1212 useful for debugging layout. */
1215 if (clip[H][0] != clip[H][1])
1217 int offset = (xr->nest) * XR_POINT;
1219 cairo_save (xr->cairo);
1220 cairo_set_source_rgb (xr->cairo, 0, 0, 1);
1222 bb[H][0] + offset, bb[V][0] + offset,
1223 bb[H][1] - offset, bb[V][1] - offset);
1224 cairo_restore (xr->cairo);
1228 for (i = 0; i < cell->n_contents && bb[V][0] < bb[V][1]; i++)
1230 const struct cell_contents *contents = &cell->contents[i];
1236 bb[V][0] += xr->char_height / 2;
1237 if (bb[V][0] >= bb[V][1])
1243 bb[V][0] = xr_layout_cell_text (xr, contents, cell->style, bb, clip,
1246 *height = bb[V][0] - bb_[V][0];
1249 struct output_driver_factory pdf_driver_factory =
1250 { "pdf", "pspp.pdf", xr_pdf_create };
1251 struct output_driver_factory ps_driver_factory =
1252 { "ps", "pspp.ps", xr_ps_create };
1253 struct output_driver_factory svg_driver_factory =
1254 { "svg", "pspp.svg", xr_svg_create };
1256 static const struct output_driver_class cairo_driver_class =
1264 /* GUI rendering helpers. */
1268 struct output_item *item;
1271 struct render_pager *p;
1272 struct xr_driver *xr;
1275 #define CHART_WIDTH 500
1276 #define CHART_HEIGHT 375
1281 xr_driver_create (cairo_t *cairo, struct string_map *options)
1283 struct xr_driver *xr = xr_allocate ("cairo", 0, options);
1284 if (!xr_set_cairo (xr, cairo))
1286 output_driver_destroy (&xr->driver);
1292 /* Destroy XR, which should have been created with xr_driver_create(). Any
1293 cairo_t added to XR is not destroyed, because it is owned by the client. */
1295 xr_driver_destroy (struct xr_driver *xr)
1300 output_driver_destroy (&xr->driver);
1304 static struct xr_rendering *
1305 xr_rendering_create_text (struct xr_driver *xr, const char *text, cairo_t *cr)
1307 struct table_item *table_item;
1308 struct xr_rendering *r;
1310 table_item = table_item_create (table_from_string (TAB_LEFT, text),
1312 r = xr_rendering_create (xr, &table_item->output_item, cr);
1313 table_item_unref (table_item);
1319 xr_rendering_apply_options (struct xr_rendering *xr, struct string_map *o)
1321 if (is_table_item (xr->item))
1322 apply_options (xr->xr, o);
1325 struct xr_rendering *
1326 xr_rendering_create (struct xr_driver *xr, const struct output_item *item,
1329 struct xr_rendering *r = NULL;
1331 if (is_text_item (item))
1332 r = xr_rendering_create_text (xr, text_item_get_text (to_text_item (item)),
1334 else if (is_message_item (item))
1336 const struct message_item *message_item = to_message_item (item);
1337 const struct msg *msg = message_item_get_msg (message_item);
1338 char *s = msg_to_string (msg, NULL);
1339 r = xr_rendering_create_text (xr, s, cr);
1342 else if (is_table_item (item))
1344 r = xzalloc (sizeof *r);
1345 r->item = output_item_ref (item);
1347 xr_set_cairo (xr, cr);
1348 r->p = render_pager_create (xr->params, to_table_item (item));
1350 else if (is_chart_item (item))
1352 r = xzalloc (sizeof *r);
1353 r->item = output_item_ref (item);
1360 xr_rendering_destroy (struct xr_rendering *r)
1364 output_item_unref (r->item);
1365 render_pager_destroy (r->p);
1371 xr_rendering_measure (struct xr_rendering *r, int *w, int *h)
1373 if (is_table_item (r->item))
1375 *w = render_pager_get_size (r->p, H) / XR_POINT;
1376 *h = render_pager_get_size (r->p, V) / XR_POINT;
1385 static void xr_draw_chart (const struct chart_item *, cairo_t *,
1386 double x, double y, double width, double height);
1390 xr_rendering_draw_all (struct xr_rendering *r, cairo_t *cr)
1392 if (is_table_item (r->item))
1394 struct xr_driver *xr = r->xr;
1396 xr_set_cairo (xr, cr);
1398 render_pager_draw (r->p);
1402 xr_draw_chart (to_chart_item (r->item), cr,
1403 0, 0, CHART_WIDTH, CHART_HEIGHT);
1407 xr_draw_chart (const struct chart_item *chart_item, cairo_t *cr,
1408 double x, double y, double width, double height)
1410 struct xrchart_geometry geom;
1413 cairo_translate (cr, x, y + height);
1414 cairo_scale (cr, 1.0, -1.0);
1415 xrchart_geometry_init (cr, &geom, width, height);
1416 if (is_boxplot (chart_item))
1417 xrchart_draw_boxplot (chart_item, cr, &geom);
1418 else if (is_histogram_chart (chart_item))
1419 xrchart_draw_histogram (chart_item, cr, &geom);
1420 else if (is_np_plot_chart (chart_item))
1421 xrchart_draw_np_plot (chart_item, cr, &geom);
1422 else if (is_piechart (chart_item))
1423 xrchart_draw_piechart (chart_item, cr, &geom);
1424 else if (is_barchart (chart_item))
1425 xrchart_draw_barchart (chart_item, cr, &geom);
1426 else if (is_roc_chart (chart_item))
1427 xrchart_draw_roc (chart_item, cr, &geom);
1428 else if (is_scree (chart_item))
1429 xrchart_draw_scree (chart_item, cr, &geom);
1430 else if (is_spreadlevel_plot_chart (chart_item))
1431 xrchart_draw_spreadlevel (chart_item, cr, &geom);
1432 else if (is_scatterplot_chart (chart_item))
1433 xrchart_draw_scatterplot (chart_item, cr, &geom);
1436 xrchart_geometry_free (cr, &geom);
1442 xr_draw_png_chart (const struct chart_item *item,
1443 const char *file_name_template, int number,
1444 const struct xr_color *fg,
1445 const struct xr_color *bg
1448 const int width = 640;
1449 const int length = 480;
1451 cairo_surface_t *surface;
1452 cairo_status_t status;
1453 const char *number_pos;
1457 number_pos = strchr (file_name_template, '#');
1458 if (number_pos != NULL)
1459 file_name = xasprintf ("%.*s%d%s", (int) (number_pos - file_name_template),
1460 file_name_template, number, number_pos + 1);
1462 file_name = xstrdup (file_name_template);
1464 surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, length);
1465 cr = cairo_create (surface);
1467 cairo_set_source_rgb (cr, bg->red, bg->green, bg->blue);
1470 cairo_set_source_rgb (cr, fg->red, fg->green, fg->blue);
1472 xr_draw_chart (item, cr, 0.0, 0.0, width, length);
1474 status = cairo_surface_write_to_png (surface, file_name);
1475 if (status != CAIRO_STATUS_SUCCESS)
1476 msg (ME, _("error writing output file `%s': %s"),
1477 file_name, cairo_status_to_string (status));
1480 cairo_surface_destroy (surface);
1485 struct xr_table_state
1487 struct xr_render_fsm fsm;
1488 struct table_item *table_item;
1489 struct render_pager *p;
1493 xr_table_render (struct xr_render_fsm *fsm, struct xr_driver *xr)
1495 struct xr_table_state *ts = UP_CAST (fsm, struct xr_table_state, fsm);
1497 while (render_pager_has_next (ts->p))
1501 used = render_pager_draw_next (ts->p, xr->length - xr->y);
1514 xr_table_destroy (struct xr_render_fsm *fsm)
1516 struct xr_table_state *ts = UP_CAST (fsm, struct xr_table_state, fsm);
1518 table_item_unref (ts->table_item);
1519 render_pager_destroy (ts->p);
1523 static struct xr_render_fsm *
1524 xr_render_table (struct xr_driver *xr, const struct table_item *table_item)
1526 struct xr_table_state *ts;
1528 ts = xmalloc (sizeof *ts);
1529 ts->fsm.render = xr_table_render;
1530 ts->fsm.destroy = xr_table_destroy;
1531 ts->table_item = table_item_ref (table_item);
1534 xr->y += xr->char_height;
1536 ts->p = render_pager_create (xr->params, table_item);
1541 struct xr_chart_state
1543 struct xr_render_fsm fsm;
1544 struct chart_item *chart_item;
1548 xr_chart_render (struct xr_render_fsm *fsm, struct xr_driver *xr)
1550 struct xr_chart_state *cs = UP_CAST (fsm, struct xr_chart_state, fsm);
1552 const int chart_height = 0.8 * (xr->length < xr->width ? xr->length : xr->width);
1554 if (xr->y > xr->length - chart_height)
1557 if (xr->cairo != NULL)
1559 xr_draw_chart (cs->chart_item, xr->cairo,
1562 xr_to_pt (xr->width),
1563 xr_to_pt (chart_height));
1565 xr->y += chart_height;
1571 xr_chart_destroy (struct xr_render_fsm *fsm)
1573 struct xr_chart_state *cs = UP_CAST (fsm, struct xr_chart_state, fsm);
1575 chart_item_unref (cs->chart_item);
1579 static struct xr_render_fsm *
1580 xr_render_chart (const struct chart_item *chart_item)
1582 struct xr_chart_state *cs;
1584 cs = xmalloc (sizeof *cs);
1585 cs->fsm.render = xr_chart_render;
1586 cs->fsm.destroy = xr_chart_destroy;
1587 cs->chart_item = chart_item_ref (chart_item);
1593 xr_eject_render (struct xr_render_fsm *fsm UNUSED, struct xr_driver *xr)
1599 xr_eject_destroy (struct xr_render_fsm *fsm UNUSED)
1601 /* Nothing to do. */
1604 static struct xr_render_fsm *
1605 xr_render_eject (void)
1607 static struct xr_render_fsm eject_renderer =
1613 return &eject_renderer;
1616 static struct xr_render_fsm *
1617 xr_create_text_renderer (struct xr_driver *xr, const char *text)
1619 struct table_item *table_item;
1620 struct xr_render_fsm *fsm;
1622 table_item = table_item_create (table_from_string (TAB_LEFT, text),
1624 fsm = xr_render_table (xr, table_item);
1625 table_item_unref (table_item);
1630 static struct xr_render_fsm *
1631 xr_render_text (struct xr_driver *xr, const struct text_item *text_item)
1633 enum text_item_type type = text_item_get_type (text_item);
1634 const char *text = text_item_get_text (text_item);
1638 case TEXT_ITEM_TITLE:
1640 xr->title = xstrdup (text);
1643 case TEXT_ITEM_SUBTITLE:
1644 free (xr->subtitle);
1645 xr->subtitle = xstrdup (text);
1648 case TEXT_ITEM_COMMAND_CLOSE:
1651 case TEXT_ITEM_BLANK_LINE:
1653 xr->y += xr->char_height;
1656 case TEXT_ITEM_EJECT_PAGE:
1658 return xr_render_eject ();
1662 return xr_create_text_renderer (xr, text);
1668 static struct xr_render_fsm *
1669 xr_render_message (struct xr_driver *xr,
1670 const struct message_item *message_item)
1672 const struct msg *msg = message_item_get_msg (message_item);
1673 struct xr_render_fsm *fsm;
1676 s = msg_to_string (msg, message_item->command_name);
1677 fsm = xr_create_text_renderer (xr, s);
1683 static struct xr_render_fsm *
1684 xr_render_output_item (struct xr_driver *xr,
1685 const struct output_item *output_item)
1687 if (is_table_item (output_item))
1688 return xr_render_table (xr, to_table_item (output_item));
1689 else if (is_chart_item (output_item))
1690 return xr_render_chart (to_chart_item (output_item));
1691 else if (is_text_item (output_item))
1692 return xr_render_text (xr, to_text_item (output_item));
1693 else if (is_message_item (output_item))
1694 return xr_render_message (xr, to_message_item (output_item));