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/pool.h"
25 #include "libpspp/start-date.h"
26 #include "libpspp/str.h"
27 #include "libpspp/string-map.h"
28 #include "libpspp/version.h"
29 #include "data/file-handle-def.h"
30 #include "output/cairo-chart.h"
31 #include "output/chart-item-provider.h"
32 #include "output/charts/boxplot.h"
33 #include "output/charts/np-plot.h"
34 #include "output/charts/piechart.h"
35 #include "output/charts/barchart.h"
36 #include "output/charts/plot-hist.h"
37 #include "output/charts/roc-chart.h"
38 #include "output/charts/spreadlevel-plot.h"
39 #include "output/charts/scree.h"
40 #include "output/charts/scatterplot.h"
41 #include "output/driver-provider.h"
42 #include "output/message-item.h"
43 #include "output/options.h"
44 #include "output/render.h"
45 #include "output/tab.h"
46 #include "output/table-item.h"
47 #include "output/table.h"
48 #include "output/text-item.h"
50 #include <cairo/cairo-pdf.h>
51 #include <cairo/cairo-ps.h>
52 #include <cairo/cairo-svg.h>
53 #include <cairo/cairo.h>
55 #include <pango/pango-font.h>
56 #include <pango/pango-layout.h>
57 #include <pango/pango.h>
58 #include <pango/pangocairo.h>
61 #include "gl/c-strcase.h"
62 #include "gl/intprops.h"
63 #include "gl/minmax.h"
64 #include "gl/xalloc.h"
67 #define _(msgid) gettext (msgid)
69 /* This file uses TABLE_HORZ and TABLE_VERT enough to warrant abbreviating. */
73 /* The unit used for internal measurements is inch/(72 * XR_POINT). */
74 #define XR_POINT PANGO_SCALE
76 /* Conversions to and from points. */
80 return x / (double) XR_POINT;
83 /* Conversion from 1/96" units ("pixels") to Cairo/Pango units. */
87 return x * (PANGO_SCALE * 72 / 96);
90 /* Dimensions for drawing lines in tables. */
91 #define XR_LINE_WIDTH (XR_POINT / 2) /* Width of an ordinary line. */
92 #define XR_LINE_SPACE XR_POINT /* Space between double lines. */
105 XR_FONT_PROPORTIONAL,
111 /* A font for use with Cairo. */
114 PangoFontDescription *desc;
118 /* An output item whose rendering is in progress. */
121 /* Renders as much of itself as it can on the current page. Returns true
122 if rendering is complete, false if the output item needs another
124 bool (*render) (struct xr_render_fsm *, struct xr_driver *);
126 /* Destroys the output item. */
127 void (*destroy) (struct xr_render_fsm *);
130 /* Cairo output driver. */
133 struct output_driver driver;
135 /* User parameters. */
136 struct xr_font fonts[XR_N_FONTS];
138 int width; /* Page width minus margins. */
139 int length; /* Page length minus margins and header. */
141 int left_margin; /* Left margin in inch/(72 * XR_POINT). */
142 int right_margin; /* Right margin in inch/(72 * XR_POINT). */
143 int top_margin; /* Top margin in inch/(72 * XR_POINT). */
144 int bottom_margin; /* Bottom margin in inch/(72 * XR_POINT). */
146 int line_space; /* Space between lines. */
147 int line_width; /* Width of lines. */
149 int min_break[TABLE_N_AXES]; /* Min cell size to break across pages. */
151 struct xr_color bg; /* Background color */
152 struct xr_color fg; /* Foreground color */
154 /* Internal state. */
155 struct render_params *params;
156 int char_width, char_height;
161 int page_number; /* Current page number. */
163 struct xr_render_fsm *fsm;
167 static const struct output_driver_class cairo_driver_class;
169 static void xr_driver_destroy_fsm (struct xr_driver *);
170 static void xr_driver_run_fsm (struct xr_driver *);
172 static void xr_draw_line (void *, int bb[TABLE_N_AXES][2],
173 enum render_line_style styles[TABLE_N_AXES][2],
174 struct cell_color colors[TABLE_N_AXES][2]);
175 static void xr_measure_cell_width (void *, const struct table_cell *,
177 static int xr_measure_cell_height (void *, const struct table_cell *,
179 static void xr_draw_cell (void *, const struct table_cell *, int color_idx,
180 int bb[TABLE_N_AXES][2],
181 int spill[TABLE_N_AXES][2],
182 int clip[TABLE_N_AXES][2]);
183 static int xr_adjust_break (void *, const struct table_cell *,
184 int width, int height);
186 static struct xr_render_fsm *xr_render_output_item (
187 struct xr_driver *, const struct output_item *);
189 /* Output driver basics. */
191 static struct xr_driver *
192 xr_driver_cast (struct output_driver *driver)
194 assert (driver->class == &cairo_driver_class);
195 return UP_CAST (driver, struct xr_driver, driver);
198 static struct driver_option *
199 opt (struct output_driver *d, struct string_map *options, const char *key,
200 const char *default_value)
202 return driver_option_get (d, options, key, default_value);
205 /* Parse color information specified by KEY into {RED,GREEN,BLUE}.
206 Currently, the input string must be of the form "#RRRRGGGGBBBB"
207 Future implementations might allow things like "yellow" and
208 "sky-blue-ultra-brown"
211 parse_color (struct output_driver *d, struct string_map *options,
212 const char *key, const char *default_value,
213 struct xr_color *color)
215 int red, green, blue;
216 char *string = parse_string (opt (d, options, key, default_value));
218 if (3 != sscanf (string, "#%04x%04x%04x", &red, &green, &blue))
220 /* If the parsed option string fails, then try the default value */
221 if ( 3 != sscanf (default_value, "#%04x%04x%04x", &red, &green, &blue))
223 /* ... and if that fails set everything to zero */
224 red = green = blue = 0;
230 /* Convert 16 bit ints to float */
231 color->red = red / (double) 0xFFFF;
232 color->green = green / (double) 0xFFFF;
233 color->blue = blue / (double) 0xFFFF;
236 static PangoFontDescription *
237 parse_font (const char *font, int default_size, bool bold, bool italic)
239 if (!c_strcasecmp (font, "Monospaced"))
242 PangoFontDescription *desc = pango_font_description_from_string (font);
246 /* If the font description didn't include an explicit font size, then set it
247 to DEFAULT_SIZE, which is in inch/72000 units. */
248 if (!(pango_font_description_get_set_fields (desc) & PANGO_FONT_MASK_SIZE))
249 pango_font_description_set_size (desc,
250 (default_size / 1000.0) * PANGO_SCALE);
252 pango_font_description_set_weight (desc, (bold
254 : PANGO_WEIGHT_NORMAL));
255 pango_font_description_set_style (desc, (italic
257 : PANGO_STYLE_NORMAL));
262 static PangoFontDescription *
263 parse_font_option (struct output_driver *d, struct string_map *options,
264 const char *key, const char *default_value,
265 int default_size, bool bold, bool italic)
267 char *string = parse_string (opt (d, options, key, default_value));
268 PangoFontDescription *desc = parse_font (string, default_size, bold, italic);
271 msg (MW, _("`%s': bad font specification"), string);
273 /* Fall back to DEFAULT_VALUE, which had better be a valid font
275 desc = parse_font (default_value, default_size, bold, italic);
276 assert (desc != NULL);
284 apply_options (struct xr_driver *xr, struct string_map *o)
286 struct output_driver *d = &xr->driver;
288 /* In inch/72000 units used by parse_paper_size() and parse_dimension(). */
289 int left_margin, right_margin;
290 int top_margin, bottom_margin;
291 int paper_width, paper_length;
293 int min_break[TABLE_N_AXES];
295 /* Scale factor from inch/72000 to inch/(72 * XR_POINT). */
296 const double scale = XR_POINT / 1000.;
300 for (i = 0; i < XR_N_FONTS; i++)
302 struct xr_font *font = &xr->fonts[i];
304 if (font->desc != NULL)
305 pango_font_description_free (font->desc);
308 font_size = parse_int (opt (d, o, "font-size", "10000"), 1000, 1000000);
309 xr->fonts[XR_FONT_FIXED].desc = parse_font_option
310 (d, o, "fixed-font", "monospace", font_size, false, false);
311 xr->fonts[XR_FONT_PROPORTIONAL].desc = parse_font_option (
312 d, o, "prop-font", "sans serif", font_size, false, false);
313 xr->fonts[XR_FONT_EMPHASIS].desc = parse_font_option (
314 d, o, "emph-font", "sans serif", font_size, false, true);
318 parse_color (d, o, "background-color", "#FFFFFFFFFFFF", &xr->bg);
319 parse_color (d, o, "foreground-color", "#000000000000", &xr->fg);
321 /* Get dimensions. */
322 parse_paper_size (opt (d, o, "paper-size", ""), &paper_width, &paper_length);
323 left_margin = parse_dimension (opt (d, o, "left-margin", ".5in"));
324 right_margin = parse_dimension (opt (d, o, "right-margin", ".5in"));
325 top_margin = parse_dimension (opt (d, o, "top-margin", ".5in"));
326 bottom_margin = parse_dimension (opt (d, o, "bottom-margin", ".5in"));
328 min_break[H] = parse_dimension (opt (d, o, "min-hbreak", NULL)) * scale;
329 min_break[V] = parse_dimension (opt (d, o, "min-vbreak", NULL)) * scale;
331 /* Convert to inch/(XR_POINT * 72). */
332 xr->left_margin = left_margin * scale;
333 xr->right_margin = right_margin * scale;
334 xr->top_margin = top_margin * scale;
335 xr->bottom_margin = bottom_margin * scale;
336 xr->width = (paper_width - left_margin - right_margin) * scale;
337 xr->length = (paper_length - top_margin - bottom_margin) * scale;
338 xr->min_break[H] = min_break[H] >= 0 ? min_break[H] : xr->width / 2;
339 xr->min_break[V] = min_break[V] >= 0 ? min_break[V] : xr->length / 2;
342 static struct xr_driver *
343 xr_allocate (const char *name, int device_type, struct string_map *o)
345 struct xr_driver *xr = xzalloc (sizeof *xr);
346 struct output_driver *d = &xr->driver;
348 output_driver_init (d, &cairo_driver_class, name, device_type);
350 apply_options (xr, o);
356 pango_to_xr (int pango)
358 return (XR_POINT != PANGO_SCALE
359 ? ceil (pango * (1. * XR_POINT / PANGO_SCALE))
366 return (XR_POINT != PANGO_SCALE
367 ? ceil (xr * (1. / XR_POINT * PANGO_SCALE))
372 xr_set_cairo (struct xr_driver *xr, cairo_t *cairo)
378 cairo_set_line_width (xr->cairo, xr_to_pt (XR_LINE_WIDTH));
382 for (i = 0; i < XR_N_FONTS; i++)
384 struct xr_font *font = &xr->fonts[i];
385 int char_width, char_height;
387 font->layout = pango_cairo_create_layout (cairo);
388 pango_layout_set_font_description (font->layout, font->desc);
390 pango_layout_set_text (font->layout, "0", 1);
391 pango_layout_get_size (font->layout, &char_width, &char_height);
392 xr->char_width = MAX (xr->char_width, pango_to_xr (char_width));
393 xr->char_height = MAX (xr->char_height, pango_to_xr (char_height));
396 if (xr->params == NULL)
398 xr->params = xmalloc (sizeof *xr->params);
399 xr->params->draw_line = xr_draw_line;
400 xr->params->measure_cell_width = xr_measure_cell_width;
401 xr->params->measure_cell_height = xr_measure_cell_height;
402 xr->params->adjust_break = xr_adjust_break;
403 xr->params->draw_cell = xr_draw_cell;
404 xr->params->aux = xr;
405 xr->params->size[H] = xr->width;
406 xr->params->size[V] = xr->length;
407 xr->params->font_size[H] = xr->char_width;
408 xr->params->font_size[V] = xr->char_height;
410 int lw = XR_LINE_WIDTH;
411 int ls = XR_LINE_SPACE;
412 for (i = 0; i < TABLE_N_AXES; i++)
414 xr->params->line_widths[i][RENDER_LINE_NONE] = 0;
415 xr->params->line_widths[i][RENDER_LINE_SINGLE] = lw;
416 xr->params->line_widths[i][RENDER_LINE_DASHED] = lw;
417 xr->params->line_widths[i][RENDER_LINE_THICK] = lw * 2;
418 xr->params->line_widths[i][RENDER_LINE_THIN] = lw / 2;
419 xr->params->line_widths[i][RENDER_LINE_DOUBLE] = 2 * lw + ls;
422 for (i = 0; i < TABLE_N_AXES; i++)
423 xr->params->min_break[i] = xr->min_break[i];
424 xr->params->supports_margins = true;
427 cairo_set_source_rgb (xr->cairo, xr->fg.red, xr->fg.green, xr->fg.blue);
432 static struct output_driver *
433 xr_create (const char *file_name, enum settings_output_devices device_type,
434 struct string_map *o, enum xr_output_type file_type)
436 enum { MIN_WIDTH = 3, MIN_LENGTH = 3 };
437 struct xr_driver *xr;
438 cairo_surface_t *surface;
439 cairo_status_t status;
440 double width_pt, length_pt;
442 xr = xr_allocate (file_name, device_type, o);
444 width_pt = xr_to_pt (xr->width + xr->left_margin + xr->right_margin);
445 length_pt = xr_to_pt (xr->length + xr->top_margin + xr->bottom_margin);
446 if (file_type == XR_PDF)
447 surface = cairo_pdf_surface_create (file_name, width_pt, length_pt);
448 else if (file_type == XR_PS)
449 surface = cairo_ps_surface_create (file_name, width_pt, length_pt);
450 else if (file_type == XR_SVG)
451 surface = cairo_svg_surface_create (file_name, width_pt, length_pt);
455 status = cairo_surface_status (surface);
456 if (status != CAIRO_STATUS_SUCCESS)
458 msg (ME, _("error opening output file `%s': %s"),
459 file_name, cairo_status_to_string (status));
460 cairo_surface_destroy (surface);
464 xr->cairo = cairo_create (surface);
465 cairo_surface_destroy (surface);
467 if (!xr_set_cairo (xr, xr->cairo))
470 cairo_save (xr->cairo);
471 xr_driver_next_page (xr, xr->cairo);
473 if (xr->width / xr->char_width < MIN_WIDTH)
475 msg (ME, _("The defined page is not wide enough to hold at least %d "
476 "characters in the default font. In fact, there's only "
477 "room for %d characters."),
479 xr->width / xr->char_width);
483 if (xr->length / xr->char_height < MIN_LENGTH)
485 msg (ME, _("The defined page is not long enough to hold at least %d "
486 "lines in the default font. In fact, there's only "
487 "room for %d lines."),
489 xr->length / xr->char_height);
496 output_driver_destroy (&xr->driver);
500 static struct output_driver *
501 xr_pdf_create (struct file_handle *fh, enum settings_output_devices device_type,
502 struct string_map *o)
504 struct output_driver *od = xr_create (fh_get_file_name (fh), device_type, o, XR_PDF);
509 static struct output_driver *
510 xr_ps_create (struct file_handle *fh, enum settings_output_devices device_type,
511 struct string_map *o)
513 struct output_driver *od = xr_create (fh_get_file_name (fh), device_type, o, XR_PS);
518 static struct output_driver *
519 xr_svg_create (struct file_handle *fh, enum settings_output_devices device_type,
520 struct string_map *o)
522 struct output_driver *od = xr_create (fh_get_file_name (fh), device_type, o, XR_SVG);
528 xr_destroy (struct output_driver *driver)
530 struct xr_driver *xr = xr_driver_cast (driver);
533 xr_driver_destroy_fsm (xr);
535 if (xr->cairo != NULL)
537 cairo_status_t status;
539 cairo_surface_finish (cairo_get_target (xr->cairo));
540 status = cairo_status (xr->cairo);
541 if (status != CAIRO_STATUS_SUCCESS)
542 msg (ME, _("error drawing output for %s driver: %s"),
543 output_driver_get_name (driver),
544 cairo_status_to_string (status));
545 cairo_destroy (xr->cairo);
548 for (i = 0; i < XR_N_FONTS; i++)
550 struct xr_font *font = &xr->fonts[i];
552 if (font->desc != NULL)
553 pango_font_description_free (font->desc);
554 if (font->layout != NULL)
555 g_object_unref (font->layout);
563 xr_flush (struct output_driver *driver)
565 struct xr_driver *xr = xr_driver_cast (driver);
567 cairo_surface_flush (cairo_get_target (xr->cairo));
571 xr_submit (struct output_driver *driver, const struct output_item *output_item)
573 struct xr_driver *xr = xr_driver_cast (driver);
575 xr_driver_output_item (xr, output_item);
576 while (xr_driver_need_new_page (xr))
578 cairo_restore (xr->cairo);
579 cairo_show_page (xr->cairo);
580 cairo_save (xr->cairo);
581 xr_driver_next_page (xr, xr->cairo);
585 /* Functions for rendering a series of output items to a series of Cairo
586 contexts, with pagination.
588 Used by PSPPIRE for printing, and by the basic Cairo output driver above as
589 its underlying implementation.
591 See the big comment in cairo.h for intended usage. */
593 /* Gives new page CAIRO to XR for output. */
595 xr_driver_next_page (struct xr_driver *xr, cairo_t *cairo)
598 cairo_set_source_rgb (cairo, xr->bg.red, xr->bg.green, xr->bg.blue);
599 cairo_rectangle (cairo, 0, 0, xr->width, xr->length);
601 cairo_restore (cairo);
603 cairo_translate (cairo,
604 xr_to_pt (xr->left_margin),
605 xr_to_pt (xr->top_margin));
610 xr_driver_run_fsm (xr);
613 /* Start rendering OUTPUT_ITEM to XR. Only valid if XR is not in the middle of
614 rendering a previous output item, that is, only if xr_driver_need_new_page()
617 xr_driver_output_item (struct xr_driver *xr,
618 const struct output_item *output_item)
620 assert (xr->fsm == NULL);
621 xr->fsm = xr_render_output_item (xr, output_item);
622 xr_driver_run_fsm (xr);
625 /* Returns true if XR is in the middle of rendering an output item and needs a
626 new page to be appended using xr_driver_next_page() to make progress,
629 xr_driver_need_new_page (const struct xr_driver *xr)
631 return xr->fsm != NULL;
634 /* Returns true if the current page doesn't have any content yet. */
636 xr_driver_is_page_blank (const struct xr_driver *xr)
642 xr_driver_destroy_fsm (struct xr_driver *xr)
646 xr->fsm->destroy (xr->fsm);
652 xr_driver_run_fsm (struct xr_driver *xr)
654 if (xr->fsm != NULL && !xr->fsm->render (xr->fsm, xr))
655 xr_driver_destroy_fsm (xr);
659 xr_layout_cell (struct xr_driver *, const struct table_cell *,
660 int bb[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
661 int *width, int *height, int *brk);
664 dump_line (struct xr_driver *xr, int x0, int y0, int x1, int y1, int style,
665 const struct cell_color *color)
667 cairo_new_path (xr->cairo);
668 cairo_set_source_rgb (xr->cairo,
669 color->r / 255.0, color->g / 255.0, color->b / 255.0);
670 cairo_set_line_width (
672 xr_to_pt (style == RENDER_LINE_THICK ? XR_LINE_WIDTH * 2
673 : style == RENDER_LINE_THIN ? XR_LINE_WIDTH / 2
675 cairo_move_to (xr->cairo, xr_to_pt (x0 + xr->x), xr_to_pt (y0 + xr->y));
676 cairo_line_to (xr->cairo, xr_to_pt (x1 + xr->x), xr_to_pt (y1 + xr->y));
677 cairo_stroke (xr->cairo);
681 dump_rectangle (struct xr_driver *xr, int x0, int y0, int x1, int y1)
683 cairo_new_path (xr->cairo);
684 cairo_set_line_width (xr->cairo, xr_to_pt (XR_LINE_WIDTH));
685 cairo_move_to (xr->cairo, xr_to_pt (x0 + xr->x), xr_to_pt (y0 + xr->y));
686 cairo_line_to (xr->cairo, xr_to_pt (x1 + xr->x), xr_to_pt (y0 + xr->y));
687 cairo_line_to (xr->cairo, xr_to_pt (x1 + xr->x), xr_to_pt (y1 + xr->y));
688 cairo_line_to (xr->cairo, xr_to_pt (x0 + xr->x), xr_to_pt (y1 + xr->y));
689 cairo_close_path (xr->cairo);
690 cairo_stroke (xr->cairo);
694 fill_rectangle (struct xr_driver *xr, int x0, int y0, int x1, int y1)
696 cairo_new_path (xr->cairo);
697 cairo_set_line_width (xr->cairo, xr_to_pt (XR_LINE_WIDTH));
698 cairo_rectangle (xr->cairo,
699 xr_to_pt (x0 + xr->x), xr_to_pt (y0 + xr->y),
700 xr_to_pt (x1 - x0), xr_to_pt (y1 - y0));
701 cairo_fill (xr->cairo);
704 /* Draws a horizontal line X0...X2 at Y if LEFT says so,
705 shortening it to X0...X1 if SHORTEN is true.
706 Draws a horizontal line X1...X3 at Y if RIGHT says so,
707 shortening it to X2...X3 if SHORTEN is true. */
709 horz_line (struct xr_driver *xr, int x0, int x1, int x2, int x3, int y,
710 enum render_line_style left, enum render_line_style right,
711 const struct cell_color *left_color,
712 const struct cell_color *right_color,
715 if (left != RENDER_LINE_NONE && right != RENDER_LINE_NONE && !shorten
716 && cell_color_equal (left_color, right_color))
717 dump_line (xr, x0, y, x3, y, left, left_color);
720 if (left != RENDER_LINE_NONE)
721 dump_line (xr, x0, y, shorten ? x1 : x2, y, left, left_color);
722 if (right != RENDER_LINE_NONE)
723 dump_line (xr, shorten ? x2 : x1, y, x3, y, right, right_color);
727 /* Draws a vertical line Y0...Y2 at X if TOP says so,
728 shortening it to Y0...Y1 if SHORTEN is true.
729 Draws a vertical line Y1...Y3 at X if BOTTOM says so,
730 shortening it to Y2...Y3 if SHORTEN is true. */
732 vert_line (struct xr_driver *xr, int y0, int y1, int y2, int y3, int x,
733 enum render_line_style top, enum render_line_style bottom,
734 const struct cell_color *top_color,
735 const struct cell_color *bottom_color,
738 if (top != RENDER_LINE_NONE && bottom != RENDER_LINE_NONE && !shorten
739 && cell_color_equal (top_color, bottom_color))
740 dump_line (xr, x, y0, x, y3, top, top_color);
743 if (top != RENDER_LINE_NONE)
744 dump_line (xr, x, y0, x, shorten ? y1 : y2, top, top_color);
745 if (bottom != RENDER_LINE_NONE)
746 dump_line (xr, x, shorten ? y2 : y1, x, y3, bottom, bottom_color);
751 xr_draw_line (void *xr_, int bb[TABLE_N_AXES][2],
752 enum render_line_style styles[TABLE_N_AXES][2],
753 struct cell_color colors[TABLE_N_AXES][2])
755 const int x0 = bb[H][0];
756 const int y0 = bb[V][0];
757 const int x3 = bb[H][1];
758 const int y3 = bb[V][1];
759 const int top = styles[H][0];
760 const int bottom = styles[H][1];
762 int start_side = render_direction_rtl();
763 int end_side = !start_side;
764 const int start_of_line = styles[V][start_side];
765 const int end_of_line = styles[V][end_side];
766 const struct cell_color *top_color = &colors[H][0];
767 const struct cell_color *bottom_color = &colors[H][1];
768 const struct cell_color *start_color = &colors[V][start_side];
769 const struct cell_color *end_color = &colors[V][end_side];
771 /* The algorithm here is somewhat subtle, to allow it to handle
772 all the kinds of intersections that we need.
774 Three additional ordinates are assigned along the x axis. The
775 first is xc, midway between x0 and x3. The others are x1 and
776 x2; for a single vertical line these are equal to xc, and for
777 a double vertical line they are the ordinates of the left and
778 right half of the double line.
780 yc, y1, and y2 are assigned similarly along the y axis.
782 The following diagram shows the coordinate system and output
783 for double top and bottom lines, single left line, and no
787 y0 ________________________
793 y1 = y2 = yc |######### # |
798 y3 |________#_____#_______|
800 struct xr_driver *xr = xr_;
802 /* Offset from center of each line in a pair of double lines. */
803 int double_line_ofs = (XR_LINE_SPACE + XR_LINE_WIDTH) / 2;
805 /* Are the lines along each axis single or double?
806 (It doesn't make sense to have different kinds of line on the
807 same axis, so we don't try to gracefully handle that case.) */
808 bool double_vert = top == RENDER_LINE_DOUBLE || bottom == RENDER_LINE_DOUBLE;
809 bool double_horz = start_of_line == RENDER_LINE_DOUBLE || end_of_line == RENDER_LINE_DOUBLE;
811 /* When horizontal lines are doubled,
812 the left-side line along y1 normally runs from x0 to x2,
813 and the right-side line along y1 from x3 to x1.
814 If the top-side line is also doubled, we shorten the y1 lines,
815 so that the left-side line runs only to x1,
816 and the right-side line only to x2.
817 Otherwise, the horizontal line at y = y1 below would cut off
818 the intersection, which looks ugly:
820 y0 ________________________
825 y1 |######### ########|
828 y2 |######################|
831 y3 |______________________|
832 It is more of a judgment call when the horizontal line is
833 single. We actually choose to cut off the line anyhow, as
834 shown in the first diagram above.
836 bool shorten_y1_lines = top == RENDER_LINE_DOUBLE;
837 bool shorten_y2_lines = bottom == RENDER_LINE_DOUBLE;
838 bool shorten_yc_line = shorten_y1_lines && shorten_y2_lines;
839 int horz_line_ofs = double_vert ? double_line_ofs : 0;
840 int xc = (x0 + x3) / 2;
841 int x1 = xc - horz_line_ofs;
842 int x2 = xc + horz_line_ofs;
844 bool shorten_x1_lines = start_of_line == RENDER_LINE_DOUBLE;
845 bool shorten_x2_lines = end_of_line == RENDER_LINE_DOUBLE;
846 bool shorten_xc_line = shorten_x1_lines && shorten_x2_lines;
847 int vert_line_ofs = double_horz ? double_line_ofs : 0;
848 int yc = (y0 + y3) / 2;
849 int y1 = yc - vert_line_ofs;
850 int y2 = yc + vert_line_ofs;
853 horz_line (xr, x0, x1, x2, x3, yc, start_of_line, end_of_line,
854 start_color, end_color, shorten_yc_line);
857 horz_line (xr, x0, x1, x2, x3, y1, start_of_line, end_of_line,
858 start_color, end_color, shorten_y1_lines);
859 horz_line (xr, x0, x1, x2, x3, y2, start_of_line, end_of_line,
860 start_color, end_color, shorten_y2_lines);
864 vert_line (xr, y0, y1, y2, y3, xc, top, bottom, top_color, bottom_color,
868 vert_line (xr, y0, y1, y2, y3, x1, top, bottom, top_color, bottom_color,
870 vert_line (xr, y0, y1, y2, y3, x2, top, bottom, top_color, bottom_color,
876 xr_measure_cell_width (void *xr_, const struct table_cell *cell,
877 int *min_width, int *max_width)
879 struct xr_driver *xr = xr_;
880 int bb[TABLE_N_AXES][2];
881 int clip[TABLE_N_AXES][2];
888 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
889 xr_layout_cell (xr, cell, bb, clip, max_width, &h, NULL);
892 xr_layout_cell (xr, cell, bb, clip, min_width, &h, NULL);
895 *min_width += px_to_xr (cell->style->margin[H][0]
896 + cell->style->margin[H][1]);
898 *max_width += px_to_xr (cell->style->margin[H][0]
899 + cell->style->margin[H][1]);
903 xr_measure_cell_height (void *xr_, const struct table_cell *cell, int width)
905 struct xr_driver *xr = xr_;
906 int bb[TABLE_N_AXES][2];
907 int clip[TABLE_N_AXES][2];
911 bb[H][1] = width - px_to_xr (cell->style->margin[H][0]
912 + cell->style->margin[H][1]);
915 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
916 xr_layout_cell (xr, cell, bb, clip, &w, &h, NULL);
917 h += px_to_xr (cell->style->margin[V][0] + cell->style->margin[V][1]);
921 static void xr_clip (struct xr_driver *, int clip[TABLE_N_AXES][2]);
924 xr_draw_cell (void *xr_, const struct table_cell *cell, int color_idx,
925 int bb[TABLE_N_AXES][2],
926 int spill[TABLE_N_AXES][2],
927 int clip[TABLE_N_AXES][2])
929 struct xr_driver *xr = xr_;
932 cairo_save (xr->cairo);
933 int bg_clip[TABLE_N_AXES][2];
934 for (int axis = 0; axis < TABLE_N_AXES; axis++)
936 bg_clip[axis][0] = clip[axis][0];
937 if (bb[axis][0] == clip[axis][0])
938 bg_clip[axis][0] -= spill[axis][0];
940 bg_clip[axis][1] = clip[axis][1];
941 if (bb[axis][1] == clip[axis][1])
942 bg_clip[axis][1] += spill[axis][1];
944 xr_clip (xr, bg_clip);
945 cairo_set_source_rgb (xr->cairo,
946 cell->style->bg[color_idx].r / 255.,
947 cell->style->bg[color_idx].g / 255.,
948 cell->style->bg[color_idx].b / 255.);
950 bb[H][0] - spill[H][0],
951 bb[V][0] - spill[V][0],
952 bb[H][1] + spill[H][1],
953 bb[V][1] + spill[V][1]);
954 cairo_restore (xr->cairo);
956 cairo_save (xr->cairo);
957 cairo_set_source_rgb (xr->cairo,
958 cell->style->fg[color_idx].r / 255.,
959 cell->style->fg[color_idx].g / 255.,
960 cell->style->fg[color_idx].b / 255.);
962 for (int axis = 0; axis < TABLE_N_AXES; axis++)
964 bb[axis][0] += px_to_xr (cell->style->margin[axis][0]);
965 bb[axis][1] -= px_to_xr (cell->style->margin[axis][1]);
967 if (bb[H][0] < bb[H][1] && bb[V][0] < bb[V][1])
968 xr_layout_cell (xr, cell, bb, clip, &w, &h, &brk);
969 cairo_restore (xr->cairo);
973 xr_adjust_break (void *xr_, const struct table_cell *cell,
974 int width, int height)
976 struct xr_driver *xr = xr_;
977 int bb[TABLE_N_AXES][2];
978 int clip[TABLE_N_AXES][2];
981 if (xr_measure_cell_height (xr_, cell, width) < height)
985 bb[H][1] = width - px_to_xr (cell->style->margin[H][0]
986 + cell->style->margin[H][1]);
990 bb[V][1] = height - px_to_xr (cell->style->margin[V][0]
991 + cell->style->margin[V][1]);
992 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
993 xr_layout_cell (xr, cell, bb, clip, &w, &h, &brk);
998 xr_clip (struct xr_driver *xr, int clip[TABLE_N_AXES][2])
1000 if (clip[H][1] != INT_MAX || clip[V][1] != INT_MAX)
1002 double x0 = xr_to_pt (clip[H][0] + xr->x);
1003 double y0 = xr_to_pt (clip[V][0] + xr->y);
1004 double x1 = xr_to_pt (clip[H][1] + xr->x);
1005 double y1 = xr_to_pt (clip[V][1] + xr->y);
1007 cairo_rectangle (xr->cairo, x0, y0, x1 - x0, y1 - y0);
1008 cairo_clip (xr->cairo);
1013 add_attr_with_start (PangoAttrList *list, PangoAttribute *attr, guint start_index)
1015 attr->start_index = start_index;
1016 pango_attr_list_insert (list, attr);
1020 xr_layout_cell_text (struct xr_driver *xr,
1021 const struct cell_contents *contents,
1022 const struct cell_style *style,
1023 int bb[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
1024 int *widthp, int *brk)
1026 unsigned int options = contents->options;
1030 struct xr_font *font = (options & TAB_FIX ? &xr->fonts[XR_FONT_FIXED]
1031 : options & TAB_EMPH ? &xr->fonts[XR_FONT_EMPHASIS]
1032 : &xr->fonts[XR_FONT_PROPORTIONAL]);
1033 struct xr_font local_font;
1036 PangoFontDescription *desc = parse_font (
1038 style->font_size ? style->font_size * 1000 * 72 / 128 : 10000,
1039 style->bold, style->italic);
1042 PangoLayout *layout = pango_cairo_create_layout (xr->cairo);
1043 pango_layout_set_font_description (layout, desc);
1045 local_font.desc = desc;
1046 local_font.layout = layout;
1051 int footnote_adjustment;
1052 if (contents->n_footnotes == 0)
1053 footnote_adjustment = 0;
1054 else if (contents->n_footnotes == 1 && (options & TAB_HALIGN) == TAB_RIGHT)
1056 PangoAttrList *attrs;
1058 const char *marker = contents->footnotes[0]->marker;
1059 pango_layout_set_text (font->layout, marker, strlen (marker));
1061 attrs = pango_attr_list_new ();
1062 pango_attr_list_insert (attrs, pango_attr_rise_new (7000));
1063 pango_layout_set_attributes (font->layout, attrs);
1064 pango_attr_list_unref (attrs);
1066 pango_layout_get_size (font->layout, &w, &h);
1067 footnote_adjustment = MIN (w, px_to_xr (style->margin[H][1]));
1070 footnote_adjustment = px_to_xr (style->margin[H][1]);
1072 length = strlen (contents->text);
1073 if (footnote_adjustment)
1075 PangoAttrList *attrs;
1078 bb[H][1] += footnote_adjustment;
1081 ds_extend (&s, length + contents->n_footnotes * 10);
1082 ds_put_cstr (&s, contents->text);
1083 cell_contents_format_footnote_markers (contents, &s);
1084 pango_layout_set_text (font->layout, ds_cstr (&s), ds_length (&s));
1087 attrs = pango_attr_list_new ();
1088 if (style->underline)
1089 pango_attr_list_insert (attrs, pango_attr_underline_new (
1090 PANGO_UNDERLINE_SINGLE));
1091 add_attr_with_start (attrs, pango_attr_rise_new (7000), length);
1092 add_attr_with_start (
1093 attrs, pango_attr_font_desc_new (font->desc), length);
1094 pango_layout_set_attributes (font->layout, attrs);
1095 pango_attr_list_unref (attrs);
1099 pango_layout_set_text (font->layout, contents->text, -1);
1101 if (style->underline)
1103 PangoAttrList *attrs = pango_attr_list_new ();
1104 pango_attr_list_insert (attrs, pango_attr_underline_new (
1105 PANGO_UNDERLINE_SINGLE));
1106 pango_layout_set_attributes (font->layout, attrs);
1107 pango_attr_list_unref (attrs);
1111 pango_layout_set_alignment (
1113 ((options & TAB_HALIGN) == TAB_RIGHT ? PANGO_ALIGN_RIGHT
1114 : (options & TAB_HALIGN) == TAB_LEFT ? PANGO_ALIGN_LEFT
1115 : PANGO_ALIGN_CENTER));
1116 pango_layout_set_width (
1118 bb[H][1] == INT_MAX ? -1 : xr_to_pango (bb[H][1] - bb[H][0]));
1119 pango_layout_set_wrap (font->layout, PANGO_WRAP_WORD);
1121 if (clip[H][0] != clip[H][1])
1123 cairo_save (xr->cairo);
1125 cairo_translate (xr->cairo,
1126 xr_to_pt (bb[H][0] + xr->x),
1127 xr_to_pt (bb[V][0] + xr->y));
1128 pango_cairo_show_layout (xr->cairo, font->layout);
1130 /* If enabled, this draws a blue rectangle around the extents of each
1131 line of text, which can be rather useful for debugging layout
1135 PangoLayoutIter *iter;
1136 iter = pango_layout_get_iter (font->layout);
1139 PangoRectangle extents;
1141 pango_layout_iter_get_line_extents (iter, &extents, NULL);
1142 cairo_save (xr->cairo);
1143 cairo_set_source_rgb (xr->cairo, 1, 0, 0);
1145 pango_to_xr (extents.x) - xr->x,
1146 pango_to_xr (extents.y) - xr->y,
1147 pango_to_xr (extents.x + extents.width) - xr->x,
1148 pango_to_xr (extents.y + extents.height) - xr->y);
1149 cairo_restore (xr->cairo);
1151 while (pango_layout_iter_next_line (iter));
1152 pango_layout_iter_free (iter);
1155 cairo_restore (xr->cairo);
1158 pango_layout_get_size (font->layout, &w, &h);
1159 w = pango_to_xr (w);
1160 h = pango_to_xr (h);
1163 if (bb[V][0] + h >= bb[V][1])
1165 PangoLayoutIter *iter;
1166 int best UNUSED = 0;
1168 /* Choose a breakpoint between lines instead of in the middle of one. */
1169 iter = pango_layout_get_iter (font->layout);
1172 PangoRectangle extents;
1176 pango_layout_iter_get_line_extents (iter, NULL, &extents);
1177 pango_layout_iter_get_line_yrange (iter, &y0, &y1);
1178 extents.x = pango_to_xr (extents.x);
1179 extents.y = pango_to_xr (y0);
1180 extents.width = pango_to_xr (extents.width);
1181 extents.height = pango_to_xr (y1 - y0);
1182 bottom = bb[V][0] + extents.y + extents.height;
1183 if (bottom < bb[V][1])
1185 if (brk && clip[H][0] != clip[H][1])
1193 while (pango_layout_iter_next_line (iter));
1194 pango_layout_iter_free (iter);
1196 /* If enabled, draws a green line across the chosen breakpoint, which can
1197 be useful for debugging issues with breaking. */
1200 if (best && !xr->nest)
1201 dump_line (xr, -xr->left_margin, best,
1202 xr->width + xr->right_margin, best,
1203 RENDER_LINE_SINGLE, &CELL_COLOR (0, 255, 0));
1207 pango_layout_set_attributes (font->layout, NULL);
1209 if (font == &local_font)
1211 g_object_unref (G_OBJECT (font->layout));
1212 pango_font_description_free (font->desc);
1215 return bb[V][0] + h;
1219 xr_layout_cell (struct xr_driver *xr, const struct table_cell *cell,
1220 int bb_[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
1221 int *width, int *height, int *brk)
1223 int bb[TABLE_N_AXES][2];
1231 memcpy (bb, bb_, sizeof bb);
1233 /* If enabled, draws a blue rectangle around the cell extents, which can be
1234 useful for debugging layout. */
1237 if (clip[H][0] != clip[H][1])
1239 int offset = (xr->nest) * XR_POINT;
1241 cairo_save (xr->cairo);
1242 cairo_set_source_rgb (xr->cairo, 0, 0, 1);
1244 bb[H][0] + offset, bb[V][0] + offset,
1245 bb[H][1] - offset, bb[V][1] - offset);
1246 cairo_restore (xr->cairo);
1250 for (i = 0; i < cell->n_contents && bb[V][0] < bb[V][1]; i++)
1252 const struct cell_contents *contents = &cell->contents[i];
1258 bb[V][0] += xr->char_height / 2;
1259 if (bb[V][0] >= bb[V][1])
1265 bb[V][0] = xr_layout_cell_text (xr, contents, cell->style, bb, clip,
1268 *height = bb[V][0] - bb_[V][0];
1271 struct output_driver_factory pdf_driver_factory =
1272 { "pdf", "pspp.pdf", xr_pdf_create };
1273 struct output_driver_factory ps_driver_factory =
1274 { "ps", "pspp.ps", xr_ps_create };
1275 struct output_driver_factory svg_driver_factory =
1276 { "svg", "pspp.svg", xr_svg_create };
1278 static const struct output_driver_class cairo_driver_class =
1286 /* GUI rendering helpers. */
1290 struct output_item *item;
1293 struct render_pager *p;
1294 struct xr_driver *xr;
1297 #define CHART_WIDTH 500
1298 #define CHART_HEIGHT 375
1303 xr_driver_create (cairo_t *cairo, struct string_map *options)
1305 struct xr_driver *xr = xr_allocate ("cairo", 0, options);
1306 if (!xr_set_cairo (xr, cairo))
1308 output_driver_destroy (&xr->driver);
1314 /* Destroy XR, which should have been created with xr_driver_create(). Any
1315 cairo_t added to XR is not destroyed, because it is owned by the client. */
1317 xr_driver_destroy (struct xr_driver *xr)
1322 output_driver_destroy (&xr->driver);
1326 static struct xr_rendering *
1327 xr_rendering_create_text (struct xr_driver *xr, const char *text, cairo_t *cr)
1329 struct table_item *table_item;
1330 struct xr_rendering *r;
1332 table_item = table_item_create (table_from_string (TAB_LEFT, text),
1334 r = xr_rendering_create (xr, &table_item->output_item, cr);
1335 table_item_unref (table_item);
1341 xr_rendering_apply_options (struct xr_rendering *xr, struct string_map *o)
1343 if (is_table_item (xr->item))
1344 apply_options (xr->xr, o);
1347 struct xr_rendering *
1348 xr_rendering_create (struct xr_driver *xr, const struct output_item *item,
1351 struct xr_rendering *r = NULL;
1353 if (is_text_item (item))
1354 r = xr_rendering_create_text (xr, text_item_get_text (to_text_item (item)),
1356 else if (is_message_item (item))
1358 const struct message_item *message_item = to_message_item (item);
1359 const struct msg *msg = message_item_get_msg (message_item);
1360 char *s = msg_to_string (msg, NULL);
1361 r = xr_rendering_create_text (xr, s, cr);
1364 else if (is_table_item (item))
1366 r = xzalloc (sizeof *r);
1367 r->item = output_item_ref (item);
1369 xr_set_cairo (xr, cr);
1370 r->p = render_pager_create (xr->params, to_table_item (item));
1372 else if (is_chart_item (item))
1374 r = xzalloc (sizeof *r);
1375 r->item = output_item_ref (item);
1382 xr_rendering_destroy (struct xr_rendering *r)
1386 output_item_unref (r->item);
1387 render_pager_destroy (r->p);
1393 xr_rendering_measure (struct xr_rendering *r, int *w, int *h)
1395 if (is_table_item (r->item))
1397 *w = render_pager_get_size (r->p, H) / XR_POINT;
1398 *h = render_pager_get_size (r->p, V) / XR_POINT;
1407 static void xr_draw_chart (const struct chart_item *, cairo_t *,
1408 double x, double y, double width, double height);
1412 xr_rendering_draw_all (struct xr_rendering *r, cairo_t *cr)
1414 if (is_table_item (r->item))
1416 struct xr_driver *xr = r->xr;
1418 xr_set_cairo (xr, cr);
1420 render_pager_draw (r->p);
1424 xr_draw_chart (to_chart_item (r->item), cr,
1425 0, 0, CHART_WIDTH, CHART_HEIGHT);
1429 xr_draw_chart (const struct chart_item *chart_item, cairo_t *cr,
1430 double x, double y, double width, double height)
1432 struct xrchart_geometry geom;
1435 cairo_translate (cr, x, y + height);
1436 cairo_scale (cr, 1.0, -1.0);
1437 xrchart_geometry_init (cr, &geom, width, height);
1438 if (is_boxplot (chart_item))
1439 xrchart_draw_boxplot (chart_item, cr, &geom);
1440 else if (is_histogram_chart (chart_item))
1441 xrchart_draw_histogram (chart_item, cr, &geom);
1442 else if (is_np_plot_chart (chart_item))
1443 xrchart_draw_np_plot (chart_item, cr, &geom);
1444 else if (is_piechart (chart_item))
1445 xrchart_draw_piechart (chart_item, cr, &geom);
1446 else if (is_barchart (chart_item))
1447 xrchart_draw_barchart (chart_item, cr, &geom);
1448 else if (is_roc_chart (chart_item))
1449 xrchart_draw_roc (chart_item, cr, &geom);
1450 else if (is_scree (chart_item))
1451 xrchart_draw_scree (chart_item, cr, &geom);
1452 else if (is_spreadlevel_plot_chart (chart_item))
1453 xrchart_draw_spreadlevel (chart_item, cr, &geom);
1454 else if (is_scatterplot_chart (chart_item))
1455 xrchart_draw_scatterplot (chart_item, cr, &geom);
1458 xrchart_geometry_free (cr, &geom);
1464 xr_draw_png_chart (const struct chart_item *item,
1465 const char *file_name_template, int number,
1466 const struct xr_color *fg,
1467 const struct xr_color *bg
1470 const int width = 640;
1471 const int length = 480;
1473 cairo_surface_t *surface;
1474 cairo_status_t status;
1475 const char *number_pos;
1479 number_pos = strchr (file_name_template, '#');
1480 if (number_pos != NULL)
1481 file_name = xasprintf ("%.*s%d%s", (int) (number_pos - file_name_template),
1482 file_name_template, number, number_pos + 1);
1484 file_name = xstrdup (file_name_template);
1486 surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, length);
1487 cr = cairo_create (surface);
1489 cairo_set_source_rgb (cr, bg->red, bg->green, bg->blue);
1492 cairo_set_source_rgb (cr, fg->red, fg->green, fg->blue);
1494 xr_draw_chart (item, cr, 0.0, 0.0, width, length);
1496 status = cairo_surface_write_to_png (surface, file_name);
1497 if (status != CAIRO_STATUS_SUCCESS)
1498 msg (ME, _("error writing output file `%s': %s"),
1499 file_name, cairo_status_to_string (status));
1502 cairo_surface_destroy (surface);
1507 struct xr_table_state
1509 struct xr_render_fsm fsm;
1510 struct table_item *table_item;
1511 struct render_pager *p;
1515 xr_table_render (struct xr_render_fsm *fsm, struct xr_driver *xr)
1517 struct xr_table_state *ts = UP_CAST (fsm, struct xr_table_state, fsm);
1519 while (render_pager_has_next (ts->p))
1523 used = render_pager_draw_next (ts->p, xr->length - xr->y);
1536 xr_table_destroy (struct xr_render_fsm *fsm)
1538 struct xr_table_state *ts = UP_CAST (fsm, struct xr_table_state, fsm);
1540 table_item_unref (ts->table_item);
1541 render_pager_destroy (ts->p);
1545 static struct xr_render_fsm *
1546 xr_render_table (struct xr_driver *xr, const struct table_item *table_item)
1548 struct xr_table_state *ts;
1550 ts = xmalloc (sizeof *ts);
1551 ts->fsm.render = xr_table_render;
1552 ts->fsm.destroy = xr_table_destroy;
1553 ts->table_item = table_item_ref (table_item);
1556 xr->y += xr->char_height;
1558 ts->p = render_pager_create (xr->params, table_item);
1563 struct xr_chart_state
1565 struct xr_render_fsm fsm;
1566 struct chart_item *chart_item;
1570 xr_chart_render (struct xr_render_fsm *fsm, struct xr_driver *xr)
1572 struct xr_chart_state *cs = UP_CAST (fsm, struct xr_chart_state, fsm);
1574 const int chart_height = 0.8 * (xr->length < xr->width ? xr->length : xr->width);
1576 if (xr->y > xr->length - chart_height)
1579 if (xr->cairo != NULL)
1581 xr_draw_chart (cs->chart_item, xr->cairo,
1584 xr_to_pt (xr->width),
1585 xr_to_pt (chart_height));
1587 xr->y += chart_height;
1593 xr_chart_destroy (struct xr_render_fsm *fsm)
1595 struct xr_chart_state *cs = UP_CAST (fsm, struct xr_chart_state, fsm);
1597 chart_item_unref (cs->chart_item);
1601 static struct xr_render_fsm *
1602 xr_render_chart (const struct chart_item *chart_item)
1604 struct xr_chart_state *cs;
1606 cs = xmalloc (sizeof *cs);
1607 cs->fsm.render = xr_chart_render;
1608 cs->fsm.destroy = xr_chart_destroy;
1609 cs->chart_item = chart_item_ref (chart_item);
1615 xr_eject_render (struct xr_render_fsm *fsm UNUSED, struct xr_driver *xr)
1621 xr_eject_destroy (struct xr_render_fsm *fsm UNUSED)
1623 /* Nothing to do. */
1626 static struct xr_render_fsm *
1627 xr_render_eject (void)
1629 static struct xr_render_fsm eject_renderer =
1635 return &eject_renderer;
1638 static struct xr_render_fsm *
1639 xr_create_text_renderer (struct xr_driver *xr, const struct text_item *item)
1641 struct tab_table *tab = tab_create (1, 1);
1643 struct cell_style *style = pool_alloc (tab->container, sizeof *style);
1644 *style = (struct cell_style) CELL_STYLE_INITIALIZER;
1646 style->font = pool_strdup (tab->container, item->font);
1647 style->font_size = item->font_size;
1648 style->bold = item->bold;
1649 style->italic = item->italic;
1650 style->underline = item->underline;
1651 tab->styles[0] = style;
1653 tab_text (tab, 0, 0, TAB_LEFT, text_item_get_text (item));
1654 struct table_item *table_item = table_item_create (&tab->table, NULL, NULL);
1655 struct xr_render_fsm *fsm = xr_render_table (xr, table_item);
1656 table_item_unref (table_item);
1661 static struct xr_render_fsm *
1662 xr_render_text (struct xr_driver *xr, const struct text_item *text_item)
1664 enum text_item_type type = text_item_get_type (text_item);
1668 case TEXT_ITEM_PAGE_TITLE:
1671 case TEXT_ITEM_COMMAND_CLOSE:
1674 case TEXT_ITEM_BLANK_LINE:
1676 xr->y += xr->char_height;
1679 case TEXT_ITEM_EJECT_PAGE:
1681 return xr_render_eject ();
1685 return xr_create_text_renderer (xr, text_item);
1691 static struct xr_render_fsm *
1692 xr_render_message (struct xr_driver *xr,
1693 const struct message_item *message_item)
1695 const struct msg *msg = message_item_get_msg (message_item);
1696 char *s = msg_to_string (msg, message_item->command_name);
1697 struct text_item *item = text_item_create (TEXT_ITEM_PARAGRAPH, s);
1699 struct xr_render_fsm *fsm = xr_create_text_renderer (xr, item);
1700 text_item_unref (item);
1705 static struct xr_render_fsm *
1706 xr_render_output_item (struct xr_driver *xr,
1707 const struct output_item *output_item)
1709 if (is_table_item (output_item))
1710 return xr_render_table (xr, to_table_item (output_item));
1711 else if (is_chart_item (output_item))
1712 return xr_render_chart (to_chart_item (output_item));
1713 else if (is_text_item (output_item))
1714 return xr_render_text (xr, to_text_item (output_item));
1715 else if (is_message_item (output_item))
1716 return xr_render_message (xr, to_message_item (output_item));