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/hash-functions.h"
24 #include "libpspp/message.h"
25 #include "libpspp/pool.h"
26 #include "libpspp/start-date.h"
27 #include "libpspp/str.h"
28 #include "libpspp/string-map.h"
29 #include "libpspp/version.h"
30 #include "data/file-handle-def.h"
31 #include "output/cairo-chart.h"
32 #include "output/chart-item-provider.h"
33 #include "output/charts/boxplot.h"
34 #include "output/charts/np-plot.h"
35 #include "output/charts/piechart.h"
36 #include "output/charts/barchart.h"
37 #include "output/charts/plot-hist.h"
38 #include "output/charts/roc-chart.h"
39 #include "output/charts/spreadlevel-plot.h"
40 #include "output/charts/scree.h"
41 #include "output/charts/scatterplot.h"
42 #include "output/driver-provider.h"
43 #include "output/group-item.h"
44 #include "output/message-item.h"
45 #include "output/options.h"
46 #include "output/page-setup-item.h"
47 #include "output/render.h"
48 #include "output/table-item.h"
49 #include "output/table.h"
50 #include "output/text-item.h"
52 #include <cairo/cairo-pdf.h>
53 #include <cairo/cairo-ps.h>
54 #include <cairo/cairo-svg.h>
55 #include <cairo/cairo.h>
58 #include <pango/pango-font.h>
59 #include <pango/pango-layout.h>
60 #include <pango/pango.h>
61 #include <pango/pangocairo.h>
64 #include "gl/c-ctype.h"
65 #include "gl/c-strcase.h"
66 #include "gl/intprops.h"
67 #include "gl/minmax.h"
68 #include "gl/xalloc.h"
71 #define _(msgid) gettext (msgid)
73 /* This file uses TABLE_HORZ and TABLE_VERT enough to warrant abbreviating. */
77 /* The unit used for internal measurements is inch/(72 * XR_POINT).
78 (Thus, XR_POINT units represent one point.) */
79 #define XR_POINT PANGO_SCALE
81 /* Conversions to and from points. */
85 return x / (double) XR_POINT;
88 /* Conversion from 1/96" units ("pixels") to Cairo/Pango units. */
92 return x * (PANGO_SCALE * 72 / 96);
95 /* Dimensions for drawing lines in tables. */
96 #define XR_LINE_WIDTH (XR_POINT / 2) /* Width of an ordinary line. */
97 #define XR_LINE_SPACE XR_POINT /* Space between double lines. */
110 XR_FONT_PROPORTIONAL,
116 /* A font for use with Cairo. */
119 PangoFontDescription *desc;
123 /* An output item whose rendering is in progress. */
126 /* Renders as much of itself as it can on the current page. Returns true
127 if rendering is complete, false if the output item needs another
129 bool (*render) (struct xr_render_fsm *, struct xr_driver *);
131 /* Destroys the output item. */
132 void (*destroy) (struct xr_render_fsm *);
135 /* Cairo output driver. */
138 struct output_driver driver;
140 /* User parameters. */
141 struct xr_font fonts[XR_N_FONTS];
143 int width; /* Page width minus margins. */
144 int length; /* Page length minus margins and header. */
146 int left_margin; /* Left margin in inch/(72 * XR_POINT). */
147 int right_margin; /* Right margin in inch/(72 * XR_POINT). */
148 int top_margin; /* Top margin in inch/(72 * XR_POINT). */
149 int bottom_margin; /* Bottom margin in inch/(72 * XR_POINT). */
151 int line_space; /* Space between lines. */
152 int line_width; /* Width of lines. */
154 int min_break[TABLE_N_AXES]; /* Min cell size to break across pages. */
155 int object_spacing; /* Space between output objects. */
157 struct cell_color bg; /* Background color */
158 struct cell_color fg; /* Foreground color */
159 bool transparent; /* true -> do not render background */
160 bool systemcolors; /* true -> do not change colors */
162 int initial_page_number;
164 struct page_heading headings[2]; /* Top and bottom headings. */
165 int headings_height[2];
167 /* Internal state. */
168 struct render_params *params;
170 int char_width, char_height;
175 cairo_surface_t *surface;
176 int page_number; /* Current page number. */
178 struct xr_render_fsm *fsm;
179 struct string_map heading_vars;
182 static const struct output_driver_class cairo_driver_class;
184 static void xr_driver_destroy_fsm (struct xr_driver *);
185 static void xr_driver_run_fsm (struct xr_driver *);
187 static void xr_draw_line (void *, int bb[TABLE_N_AXES][2],
188 enum render_line_style styles[TABLE_N_AXES][2],
189 struct cell_color colors[TABLE_N_AXES][2]);
190 static void xr_measure_cell_width (void *, const struct table_cell *,
192 static int xr_measure_cell_height (void *, const struct table_cell *,
194 static void xr_draw_cell (void *, const struct table_cell *, int color_idx,
195 int bb[TABLE_N_AXES][2], int valign_offset,
196 int spill[TABLE_N_AXES][2],
197 int clip[TABLE_N_AXES][2]);
198 static int xr_adjust_break (void *, const struct table_cell *,
199 int width, int height);
201 static struct xr_render_fsm *xr_render_output_item (
202 struct xr_driver *, const struct output_item *);
204 /* Output driver basics. */
206 static struct xr_driver *
207 xr_driver_cast (struct output_driver *driver)
209 assert (driver->class == &cairo_driver_class);
210 return UP_CAST (driver, struct xr_driver, driver);
213 static struct driver_option *
214 opt (struct output_driver *d, struct string_map *options, const char *key,
215 const char *default_value)
217 return driver_option_get (d, options, key, default_value);
221 lookup_color_name (const char *s)
225 struct hmap_node hmap_node;
230 static struct color colors[] =
232 { .name = "aliceblue", .code = 0xf0f8ff },
233 { .name = "antiquewhite", .code = 0xfaebd7 },
234 { .name = "aqua", .code = 0x00ffff },
235 { .name = "aquamarine", .code = 0x7fffd4 },
236 { .name = "azure", .code = 0xf0ffff },
237 { .name = "beige", .code = 0xf5f5dc },
238 { .name = "bisque", .code = 0xffe4c4 },
239 { .name = "black", .code = 0x000000 },
240 { .name = "blanchedalmond", .code = 0xffebcd },
241 { .name = "blue", .code = 0x0000ff },
242 { .name = "blueviolet", .code = 0x8a2be2 },
243 { .name = "brown", .code = 0xa52a2a },
244 { .name = "burlywood", .code = 0xdeb887 },
245 { .name = "cadetblue", .code = 0x5f9ea0 },
246 { .name = "chartreuse", .code = 0x7fff00 },
247 { .name = "chocolate", .code = 0xd2691e },
248 { .name = "coral", .code = 0xff7f50 },
249 { .name = "cornflowerblue", .code = 0x6495ed },
250 { .name = "cornsilk", .code = 0xfff8dc },
251 { .name = "crimson", .code = 0xdc143c },
252 { .name = "cyan", .code = 0x00ffff },
253 { .name = "darkblue", .code = 0x00008b },
254 { .name = "darkcyan", .code = 0x008b8b },
255 { .name = "darkgoldenrod", .code = 0xb8860b },
256 { .name = "darkgray", .code = 0xa9a9a9 },
257 { .name = "darkgreen", .code = 0x006400 },
258 { .name = "darkgrey", .code = 0xa9a9a9 },
259 { .name = "darkkhaki", .code = 0xbdb76b },
260 { .name = "darkmagenta", .code = 0x8b008b },
261 { .name = "darkolivegreen", .code = 0x556b2f },
262 { .name = "darkorange", .code = 0xff8c00 },
263 { .name = "darkorchid", .code = 0x9932cc },
264 { .name = "darkred", .code = 0x8b0000 },
265 { .name = "darksalmon", .code = 0xe9967a },
266 { .name = "darkseagreen", .code = 0x8fbc8f },
267 { .name = "darkslateblue", .code = 0x483d8b },
268 { .name = "darkslategray", .code = 0x2f4f4f },
269 { .name = "darkslategrey", .code = 0x2f4f4f },
270 { .name = "darkturquoise", .code = 0x00ced1 },
271 { .name = "darkviolet", .code = 0x9400d3 },
272 { .name = "deeppink", .code = 0xff1493 },
273 { .name = "deepskyblue", .code = 0x00bfff },
274 { .name = "dimgray", .code = 0x696969 },
275 { .name = "dimgrey", .code = 0x696969 },
276 { .name = "dodgerblue", .code = 0x1e90ff },
277 { .name = "firebrick", .code = 0xb22222 },
278 { .name = "floralwhite", .code = 0xfffaf0 },
279 { .name = "forestgreen", .code = 0x228b22 },
280 { .name = "fuchsia", .code = 0xff00ff },
281 { .name = "gainsboro", .code = 0xdcdcdc },
282 { .name = "ghostwhite", .code = 0xf8f8ff },
283 { .name = "gold", .code = 0xffd700 },
284 { .name = "goldenrod", .code = 0xdaa520 },
285 { .name = "gray", .code = 0x808080 },
286 { .name = "green", .code = 0x008000 },
287 { .name = "greenyellow", .code = 0xadff2f },
288 { .name = "grey", .code = 0x808080 },
289 { .name = "honeydew", .code = 0xf0fff0 },
290 { .name = "hotpink", .code = 0xff69b4 },
291 { .name = "indianred", .code = 0xcd5c5c },
292 { .name = "indigo", .code = 0x4b0082 },
293 { .name = "ivory", .code = 0xfffff0 },
294 { .name = "khaki", .code = 0xf0e68c },
295 { .name = "lavender", .code = 0xe6e6fa },
296 { .name = "lavenderblush", .code = 0xfff0f5 },
297 { .name = "lawngreen", .code = 0x7cfc00 },
298 { .name = "lemonchiffon", .code = 0xfffacd },
299 { .name = "lightblue", .code = 0xadd8e6 },
300 { .name = "lightcoral", .code = 0xf08080 },
301 { .name = "lightcyan", .code = 0xe0ffff },
302 { .name = "lightgoldenrodyellow", .code = 0xfafad2 },
303 { .name = "lightgray", .code = 0xd3d3d3 },
304 { .name = "lightgreen", .code = 0x90ee90 },
305 { .name = "lightgrey", .code = 0xd3d3d3 },
306 { .name = "lightpink", .code = 0xffb6c1 },
307 { .name = "lightsalmon", .code = 0xffa07a },
308 { .name = "lightseagreen", .code = 0x20b2aa },
309 { .name = "lightskyblue", .code = 0x87cefa },
310 { .name = "lightslategray", .code = 0x778899 },
311 { .name = "lightslategrey", .code = 0x778899 },
312 { .name = "lightsteelblue", .code = 0xb0c4de },
313 { .name = "lightyellow", .code = 0xffffe0 },
314 { .name = "lime", .code = 0x00ff00 },
315 { .name = "limegreen", .code = 0x32cd32 },
316 { .name = "linen", .code = 0xfaf0e6 },
317 { .name = "magenta", .code = 0xff00ff },
318 { .name = "maroon", .code = 0x800000 },
319 { .name = "mediumaquamarine", .code = 0x66cdaa },
320 { .name = "mediumblue", .code = 0x0000cd },
321 { .name = "mediumorchid", .code = 0xba55d3 },
322 { .name = "mediumpurple", .code = 0x9370db },
323 { .name = "mediumseagreen", .code = 0x3cb371 },
324 { .name = "mediumslateblue", .code = 0x7b68ee },
325 { .name = "mediumspringgreen", .code = 0x00fa9a },
326 { .name = "mediumturquoise", .code = 0x48d1cc },
327 { .name = "mediumvioletred", .code = 0xc71585 },
328 { .name = "midnightblue", .code = 0x191970 },
329 { .name = "mintcream", .code = 0xf5fffa },
330 { .name = "mistyrose", .code = 0xffe4e1 },
331 { .name = "moccasin", .code = 0xffe4b5 },
332 { .name = "navajowhite", .code = 0xffdead },
333 { .name = "navy", .code = 0x000080 },
334 { .name = "oldlace", .code = 0xfdf5e6 },
335 { .name = "olive", .code = 0x808000 },
336 { .name = "olivedrab", .code = 0x6b8e23 },
337 { .name = "orange", .code = 0xffa500 },
338 { .name = "orangered", .code = 0xff4500 },
339 { .name = "orchid", .code = 0xda70d6 },
340 { .name = "palegoldenrod", .code = 0xeee8aa },
341 { .name = "palegreen", .code = 0x98fb98 },
342 { .name = "paleturquoise", .code = 0xafeeee },
343 { .name = "palevioletred", .code = 0xdb7093 },
344 { .name = "papayawhip", .code = 0xffefd5 },
345 { .name = "peachpuff", .code = 0xffdab9 },
346 { .name = "peru", .code = 0xcd853f },
347 { .name = "pink", .code = 0xffc0cb },
348 { .name = "plum", .code = 0xdda0dd },
349 { .name = "powderblue", .code = 0xb0e0e6 },
350 { .name = "purple", .code = 0x800080 },
351 { .name = "red", .code = 0xff0000 },
352 { .name = "rosybrown", .code = 0xbc8f8f },
353 { .name = "royalblue", .code = 0x4169e1 },
354 { .name = "saddlebrown", .code = 0x8b4513 },
355 { .name = "salmon", .code = 0xfa8072 },
356 { .name = "sandybrown", .code = 0xf4a460 },
357 { .name = "seagreen", .code = 0x2e8b57 },
358 { .name = "seashell", .code = 0xfff5ee },
359 { .name = "sienna", .code = 0xa0522d },
360 { .name = "silver", .code = 0xc0c0c0 },
361 { .name = "skyblue", .code = 0x87ceeb },
362 { .name = "slateblue", .code = 0x6a5acd },
363 { .name = "slategray", .code = 0x708090 },
364 { .name = "slategrey", .code = 0x708090 },
365 { .name = "snow", .code = 0xfffafa },
366 { .name = "springgreen", .code = 0x00ff7f },
367 { .name = "steelblue", .code = 0x4682b4 },
368 { .name = "tan", .code = 0xd2b48c },
369 { .name = "teal", .code = 0x008080 },
370 { .name = "thistle", .code = 0xd8bfd8 },
371 { .name = "tomato", .code = 0xff6347 },
372 { .name = "turquoise", .code = 0x40e0d0 },
373 { .name = "violet", .code = 0xee82ee },
374 { .name = "wheat", .code = 0xf5deb3 },
375 { .name = "white", .code = 0xffffff },
376 { .name = "whitesmoke", .code = 0xf5f5f5 },
377 { .name = "yellow", .code = 0xffff00 },
378 { .name = "yellowgreen", .code = 0x9acd32 },
381 static struct hmap color_table = HMAP_INITIALIZER (color_table);
383 if (hmap_is_empty (&color_table))
384 for (size_t i = 0; i < sizeof colors / sizeof *colors; i++)
385 hmap_insert (&color_table, &colors[i].hmap_node,
386 hash_string (colors[i].name, 0));
388 const struct color *color;
389 HMAP_FOR_EACH_WITH_HASH (color, struct color, hmap_node,
390 hash_string (s, 0), &color_table)
391 if (!strcmp (color->name, s))
397 parse_color__ (const char *s, struct cell_color *color)
400 uint16_t r16, g16, b16;
402 if (sscanf (s, "#%4"SCNx16"%4"SCNx16"%4"SCNx16"%n",
403 &r16, &g16, &b16, &len) == 3
415 if (sscanf (s, "#%2"SCNx8"%2"SCNx8"%2"SCNx8"%n", &r, &g, &b, &len) == 3
426 if (sscanf (s, "%2"SCNx8"%2"SCNx8"%2"SCNx8"%n", &r, &g, &b, &len) == 3
437 if (sscanf (s, "rgb (%"SCNi8" , %"SCNi8" , %"SCNi8") %n",
438 &r, &g, &b, &len) == 3
447 /* rgba(r,g,b,a), ignoring a. */
448 if (sscanf (s, "rgba (%"SCNi8" , %"SCNi8" , %"SCNi8", %*f) %n",
449 &r, &g, &b, &len) == 3
458 int code = lookup_color_name (s);
461 color->r = code >> 16;
462 color->g = code >> 8;
470 /* Parse color information specified by KEY into {RED,GREEN,BLUE}.
471 Currently, the input string must be of the form "#RRRRGGGGBBBB"
472 Future implementations might allow things like "yellow" and
473 "sky-blue-ultra-brown"
476 parse_color (struct output_driver *d, struct string_map *options,
477 const char *key, const char *default_value,
478 struct cell_color *color)
480 char *string = parse_string (opt (d, options, key, default_value));
481 if (!parse_color__ (string, color) && !parse_color__ (default_value, color))
482 *color = (struct cell_color) CELL_COLOR_BLACK;
486 static PangoFontDescription *
487 parse_font (const char *font, int default_size, bool bold, bool italic)
489 if (!c_strcasecmp (font, "Monospaced"))
492 PangoFontDescription *desc = pango_font_description_from_string (font);
496 /* If the font description didn't include an explicit font size, then set it
497 to DEFAULT_SIZE, which is in inch/72000 units. */
498 if (!(pango_font_description_get_set_fields (desc) & PANGO_FONT_MASK_SIZE))
499 pango_font_description_set_size (desc,
500 (default_size / 1000.0) * PANGO_SCALE);
502 pango_font_description_set_weight (desc, (bold
504 : PANGO_WEIGHT_NORMAL));
505 pango_font_description_set_style (desc, (italic
507 : PANGO_STYLE_NORMAL));
512 static PangoFontDescription *
513 parse_font_option (struct output_driver *d, struct string_map *options,
514 const char *key, const char *default_value,
515 int default_size, bool bold, bool italic)
517 char *string = parse_string (opt (d, options, key, default_value));
518 PangoFontDescription *desc = parse_font (string, default_size, bold, italic);
521 msg (MW, _("`%s': bad font specification"), string);
523 /* Fall back to DEFAULT_VALUE, which had better be a valid font
525 desc = parse_font (default_value, default_size, bold, italic);
526 assert (desc != NULL);
534 apply_options (struct xr_driver *xr, struct string_map *o)
536 struct output_driver *d = &xr->driver;
538 /* In inch/72000 units used by parse_paper_size() and parse_dimension(). */
539 int left_margin, right_margin;
540 int top_margin, bottom_margin;
541 int paper_width, paper_length;
543 int min_break[TABLE_N_AXES];
545 /* Scale factor from inch/72000 to inch/(72 * XR_POINT). */
546 const double scale = XR_POINT / 1000.;
550 for (i = 0; i < XR_N_FONTS; i++)
552 struct xr_font *font = &xr->fonts[i];
554 if (font->desc != NULL)
555 pango_font_description_free (font->desc);
558 font_size = parse_int (opt (d, o, "font-size", "10000"), 1000, 1000000);
559 xr->fonts[XR_FONT_FIXED].desc = parse_font_option
560 (d, o, "fixed-font", "monospace", font_size, false, false);
561 xr->fonts[XR_FONT_PROPORTIONAL].desc = parse_font_option (
562 d, o, "prop-font", "sans serif", font_size, false, false);
563 xr->fonts[XR_FONT_EMPHASIS].desc = parse_font_option (
564 d, o, "emph-font", "sans serif", font_size, false, true);
566 parse_color (d, o, "background-color", "#FFFFFFFFFFFF", &xr->bg);
567 parse_color (d, o, "foreground-color", "#000000000000", &xr->fg);
569 xr->transparent = parse_boolean (opt (d, o, "transparent", "false"));
570 xr->systemcolors = parse_boolean (opt (d, o, "systemcolors", "false"));
572 /* Get dimensions. */
573 parse_paper_size (opt (d, o, "paper-size", ""), &paper_width, &paper_length);
574 left_margin = parse_dimension (opt (d, o, "left-margin", ".5in"));
575 right_margin = parse_dimension (opt (d, o, "right-margin", ".5in"));
576 top_margin = parse_dimension (opt (d, o, "top-margin", ".5in"));
577 bottom_margin = parse_dimension (opt (d, o, "bottom-margin", ".5in"));
579 min_break[H] = parse_dimension (opt (d, o, "min-hbreak", NULL)) * scale;
580 min_break[V] = parse_dimension (opt (d, o, "min-vbreak", NULL)) * scale;
582 int object_spacing = (parse_dimension (opt (d, o, "object-spacing", NULL))
585 /* Convert to inch/(XR_POINT * 72). */
586 xr->left_margin = left_margin * scale;
587 xr->right_margin = right_margin * scale;
588 xr->top_margin = top_margin * scale;
589 xr->bottom_margin = bottom_margin * scale;
590 xr->width = (paper_width - left_margin - right_margin) * scale;
591 xr->length = (paper_length - top_margin - bottom_margin) * scale;
592 xr->min_break[H] = min_break[H] >= 0 ? min_break[H] : xr->width / 2;
593 xr->min_break[V] = min_break[V] >= 0 ? min_break[V] : xr->length / 2;
594 xr->object_spacing = object_spacing >= 0 ? object_spacing : XR_POINT * 12;
596 /* There are no headings so headings_height can stay 0. */
599 static struct xr_driver *
600 xr_allocate (const char *name, int device_type, struct string_map *o,
603 struct xr_driver *xr = xzalloc (sizeof *xr);
604 struct output_driver *d = &xr->driver;
606 output_driver_init (d, &cairo_driver_class, name, device_type);
608 string_map_init (&xr->heading_vars);
610 /* This is a nasty kluge for an issue that does not make sense. On any
611 surface other than a screen (e.g. for output to PDF or PS or SVG), the
612 fonts are way too big by default. A "9-point" font seems to appear about
613 16 points tall. We use a scale factor for these surfaces to help, but the
614 underlying issue is a mystery. */
615 xr->font_scale = font_scale;
617 apply_options (xr, o);
623 pango_to_xr (int pango)
625 return (XR_POINT != PANGO_SCALE
626 ? ceil (pango * (1. * XR_POINT / PANGO_SCALE))
633 return (XR_POINT != PANGO_SCALE
634 ? ceil (xr * (1. / XR_POINT * PANGO_SCALE))
639 xr_measure_fonts (cairo_t *cairo, const struct xr_font fonts[XR_N_FONTS],
640 int *char_width, int *char_height)
644 for (int i = 0; i < XR_N_FONTS; i++)
646 PangoLayout *layout = pango_cairo_create_layout (cairo);
647 pango_layout_set_font_description (layout, fonts[i].desc);
649 pango_layout_set_text (layout, "0", 1);
652 pango_layout_get_size (layout, &cw, &ch);
653 *char_width = MAX (*char_width, pango_to_xr (cw));
654 *char_height = MAX (*char_height, pango_to_xr (ch));
656 g_object_unref (G_OBJECT (layout));
661 get_layout_height (PangoLayout *layout)
664 pango_layout_get_size (layout, &w, &h);
669 xr_render_page_heading (cairo_t *cairo, const PangoFontDescription *font,
670 const struct page_heading *ph, int page_number,
671 int width, bool draw, int base_y)
673 PangoLayout *layout = pango_cairo_create_layout (cairo);
674 pango_layout_set_font_description (layout, font);
677 for (size_t i = 0; i < ph->n; i++)
679 const struct page_paragraph *pp = &ph->paragraphs[i];
681 char *markup = output_driver_substitute_heading_vars (pp->markup,
683 pango_layout_set_markup (layout, markup, -1);
686 pango_layout_set_alignment (
688 (pp->halign == TABLE_HALIGN_LEFT ? PANGO_ALIGN_LEFT
689 : pp->halign == TABLE_HALIGN_CENTER ? PANGO_ALIGN_CENTER
690 : pp->halign == TABLE_HALIGN_MIXED ? PANGO_ALIGN_LEFT
691 : PANGO_ALIGN_RIGHT));
692 pango_layout_set_width (layout, xr_to_pango (width));
696 cairo_translate (cairo, 0, xr_to_pt (y + base_y));
697 pango_cairo_show_layout (cairo, layout);
698 cairo_restore (cairo);
701 y += pango_to_xr (get_layout_height (layout));
704 g_object_unref (G_OBJECT (layout));
710 xr_measure_headings (cairo_surface_t *surface,
711 const PangoFontDescription *font,
712 const struct page_heading headings[2],
713 int width, int object_spacing, int height[2])
715 cairo_t *cairo = cairo_create (surface);
717 for (int i = 0; i < 2; i++)
719 int h = xr_render_page_heading (cairo, font, &headings[i], -1,
722 /* If the top heading is nonempty, add some space below it. */
730 cairo_destroy (cairo);
735 xr_check_fonts (cairo_surface_t *surface,
736 const struct xr_font fonts[XR_N_FONTS],
737 int usable_width, int usable_length)
739 cairo_t *cairo = cairo_create (surface);
740 int char_width, char_height;
741 xr_measure_fonts (cairo, fonts, &char_width, &char_height);
742 cairo_destroy (cairo);
745 enum { MIN_WIDTH = 3, MIN_LENGTH = 3 };
746 if (usable_width / char_width < MIN_WIDTH)
748 msg (ME, _("The defined page is not wide enough to hold at least %d "
749 "characters in the default font. In fact, there's only "
750 "room for %d characters."),
751 MIN_WIDTH, usable_width / char_width);
754 if (usable_length / char_height < MIN_LENGTH)
756 msg (ME, _("The defined page is not long enough to hold at least %d "
757 "lines in the default font. In fact, there's only "
758 "room for %d lines."),
759 MIN_LENGTH, usable_length / char_height);
766 xr_set_cairo (struct xr_driver *xr, cairo_t *cairo)
770 cairo_set_line_width (xr->cairo, xr_to_pt (XR_LINE_WIDTH));
772 xr_measure_fonts (xr->cairo, xr->fonts, &xr->char_width, &xr->char_height);
774 for (int i = 0; i < XR_N_FONTS; i++)
776 struct xr_font *font = &xr->fonts[i];
777 font->layout = pango_cairo_create_layout (cairo);
778 pango_layout_set_font_description (font->layout, font->desc);
781 if (xr->params == NULL)
783 xr->params = xmalloc (sizeof *xr->params);
784 xr->params->draw_line = xr_draw_line;
785 xr->params->measure_cell_width = xr_measure_cell_width;
786 xr->params->measure_cell_height = xr_measure_cell_height;
787 xr->params->adjust_break = xr_adjust_break;
788 xr->params->draw_cell = xr_draw_cell;
789 xr->params->aux = xr;
790 xr->params->size[H] = xr->width;
791 xr->params->size[V] = xr->length;
792 xr->params->font_size[H] = xr->char_width;
793 xr->params->font_size[V] = xr->char_height;
795 int lw = XR_LINE_WIDTH;
796 int ls = XR_LINE_SPACE;
797 for (int i = 0; i < TABLE_N_AXES; i++)
799 xr->params->line_widths[i][RENDER_LINE_NONE] = 0;
800 xr->params->line_widths[i][RENDER_LINE_SINGLE] = lw;
801 xr->params->line_widths[i][RENDER_LINE_DASHED] = lw;
802 xr->params->line_widths[i][RENDER_LINE_THICK] = lw * 2;
803 xr->params->line_widths[i][RENDER_LINE_THIN] = lw / 2;
804 xr->params->line_widths[i][RENDER_LINE_DOUBLE] = 2 * lw + ls;
807 for (int i = 0; i < TABLE_N_AXES; i++)
808 xr->params->min_break[i] = xr->min_break[i];
809 xr->params->supports_margins = true;
810 xr->params->rtl = render_direction_rtl ();
813 if (!xr->systemcolors)
814 cairo_set_source_rgb (xr->cairo,
815 xr->fg.r / 255.0, xr->fg.g / 255.0, xr->fg.b / 255.0);
818 static struct output_driver *
819 xr_create (struct file_handle *fh, enum settings_output_devices device_type,
820 struct string_map *o, enum xr_output_type file_type)
822 const char *file_name = fh_get_file_name (fh);
823 struct xr_driver *xr = xr_allocate (file_name, device_type, o, 72.0 / 128.0);
824 double width_pt = xr_to_pt (xr->width + xr->left_margin + xr->right_margin);
825 double length_pt = xr_to_pt (xr->length + xr->top_margin + xr->bottom_margin);
826 if (file_type == XR_PDF)
827 xr->surface = cairo_pdf_surface_create (file_name, width_pt, length_pt);
828 else if (file_type == XR_PS)
829 xr->surface = cairo_ps_surface_create (file_name, width_pt, length_pt);
830 else if (file_type == XR_SVG)
831 xr->surface = cairo_svg_surface_create (file_name, width_pt, length_pt);
835 cairo_status_t status = cairo_surface_status (xr->surface);
836 if (status != CAIRO_STATUS_SUCCESS)
838 msg (ME, _("error opening output file `%s': %s"),
839 file_name, cairo_status_to_string (status));
843 if (!xr_check_fonts (xr->surface, xr->fonts, xr->width, xr->length))
851 output_driver_destroy (&xr->driver);
855 static struct output_driver *
856 xr_pdf_create (struct file_handle *fh, enum settings_output_devices device_type,
857 struct string_map *o)
859 return xr_create (fh, device_type, o, XR_PDF);
862 static struct output_driver *
863 xr_ps_create (struct file_handle *fh, enum settings_output_devices device_type,
864 struct string_map *o)
866 return xr_create (fh, device_type, o, XR_PS);
869 static struct output_driver *
870 xr_svg_create (struct file_handle *fh, enum settings_output_devices device_type,
871 struct string_map *o)
873 return xr_create (fh, device_type, o, XR_SVG);
877 xr_destroy (struct output_driver *driver)
879 struct xr_driver *xr = xr_driver_cast (driver);
882 xr_driver_destroy_fsm (xr);
884 if (xr->cairo != NULL)
886 cairo_surface_finish (xr->surface);
887 cairo_status_t status = cairo_status (xr->cairo);
888 if (status != CAIRO_STATUS_SUCCESS)
889 fprintf (stderr, _("error drawing output for %s driver: %s"),
890 output_driver_get_name (driver),
891 cairo_status_to_string (status));
892 cairo_surface_destroy (xr->surface);
894 cairo_destroy (xr->cairo);
897 for (i = 0; i < XR_N_FONTS; i++)
899 struct xr_font *font = &xr->fonts[i];
901 if (font->desc != NULL)
902 pango_font_description_free (font->desc);
903 if (font->layout != NULL)
904 g_object_unref (font->layout);
912 xr_flush (struct output_driver *driver)
914 struct xr_driver *xr = xr_driver_cast (driver);
916 cairo_surface_flush (cairo_get_target (xr->cairo));
920 xr_update_page_setup (struct output_driver *driver,
921 const struct page_setup *ps)
923 struct xr_driver *xr = xr_driver_cast (driver);
925 xr->initial_page_number = ps->initial_page_number;
926 xr->object_spacing = ps->object_spacing * 72 * XR_POINT;
931 int usable[TABLE_N_AXES];
932 for (int i = 0; i < 2; i++)
933 usable[i] = (ps->paper[i]
934 - (ps->margins[i][0] + ps->margins[i][1])) * 72 * XR_POINT;
936 int headings_height[2];
937 usable[V] -= xr_measure_headings (
938 xr->surface, xr->fonts[XR_FONT_PROPORTIONAL].desc, ps->headings,
939 usable[H], xr->object_spacing, headings_height);
941 enum table_axis h = ps->orientation == PAGE_LANDSCAPE;
942 enum table_axis v = !h;
943 if (!xr_check_fonts (xr->surface, xr->fonts, usable[h], usable[v]))
946 for (int i = 0; i < 2; i++)
948 page_heading_uninit (&xr->headings[i]);
949 page_heading_copy (&xr->headings[i], &ps->headings[i]);
950 xr->headings_height[i] = headings_height[i];
952 xr->width = usable[h];
953 xr->length = usable[v];
954 xr->left_margin = ps->margins[h][0] * 72 * XR_POINT;
955 xr->right_margin = ps->margins[h][1] * 72 * XR_POINT;
956 xr->top_margin = ps->margins[v][0] * 72 * XR_POINT;
957 xr->bottom_margin = ps->margins[v][1] * 72 * XR_POINT;
958 cairo_pdf_surface_set_size (xr->surface,
959 ps->paper[h] * 72.0, ps->paper[v] * 72.0);
963 xr_submit (struct output_driver *driver, const struct output_item *output_item)
965 struct xr_driver *xr = xr_driver_cast (driver);
967 if (is_page_setup_item (output_item))
969 xr_update_page_setup (driver,
970 to_page_setup_item (output_item)->page_setup);
976 xr->page_number = xr->initial_page_number - 1;
977 xr_set_cairo (xr, cairo_create (xr->surface));
978 cairo_save (xr->cairo);
979 xr_driver_next_page (xr, xr->cairo);
982 xr_driver_output_item (xr, output_item);
983 while (xr_driver_need_new_page (xr))
985 cairo_restore (xr->cairo);
986 cairo_show_page (xr->cairo);
987 cairo_save (xr->cairo);
988 xr_driver_next_page (xr, xr->cairo);
992 /* Functions for rendering a series of output items to a series of Cairo
993 contexts, with pagination.
995 Used by PSPPIRE for printing, and by the basic Cairo output driver above as
996 its underlying implementation.
998 See the big comment in cairo.h for intended usage. */
1000 /* Gives new page CAIRO to XR for output. */
1002 xr_driver_next_page (struct xr_driver *xr, cairo_t *cairo)
1004 if (!xr->transparent)
1007 cairo_set_source_rgb (cairo,
1008 xr->bg.r / 255.0, xr->bg.g / 255.0, xr->bg.b / 255.0);
1009 cairo_rectangle (cairo, 0, 0, xr->width, xr->length);
1011 cairo_restore (cairo);
1013 cairo_translate (cairo,
1014 xr_to_pt (xr->left_margin),
1015 xr_to_pt (xr->top_margin + xr->headings_height[0]));
1021 xr_render_page_heading (xr->cairo, xr->fonts[XR_FONT_PROPORTIONAL].desc,
1022 &xr->headings[0], xr->page_number, xr->width, true,
1023 -xr->headings_height[0]);
1024 xr_render_page_heading (xr->cairo, xr->fonts[XR_FONT_PROPORTIONAL].desc,
1025 &xr->headings[1], xr->page_number, xr->width, true,
1028 xr_driver_run_fsm (xr);
1031 /* Start rendering OUTPUT_ITEM to XR. Only valid if XR is not in the middle of
1032 rendering a previous output item, that is, only if xr_driver_need_new_page()
1035 xr_driver_output_item (struct xr_driver *xr,
1036 const struct output_item *output_item)
1038 assert (xr->fsm == NULL);
1039 xr->fsm = xr_render_output_item (xr, output_item);
1040 xr_driver_run_fsm (xr);
1043 /* Returns true if XR is in the middle of rendering an output item and needs a
1044 new page to be appended using xr_driver_next_page() to make progress,
1047 xr_driver_need_new_page (const struct xr_driver *xr)
1049 return xr->fsm != NULL;
1052 /* Returns true if the current page doesn't have any content yet. */
1054 xr_driver_is_page_blank (const struct xr_driver *xr)
1060 xr_driver_destroy_fsm (struct xr_driver *xr)
1062 if (xr->fsm != NULL)
1064 xr->fsm->destroy (xr->fsm);
1070 xr_driver_run_fsm (struct xr_driver *xr)
1072 if (xr->fsm != NULL && !xr->fsm->render (xr->fsm, xr))
1073 xr_driver_destroy_fsm (xr);
1077 xr_layout_cell (struct xr_driver *, const struct table_cell *,
1078 int bb[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
1079 int *width, int *height, int *brk);
1082 set_source_rgba (cairo_t *cairo, const struct cell_color *color)
1084 cairo_set_source_rgba (cairo,
1085 color->r / 255., color->g / 255., color->b / 255.,
1086 color->alpha / 255.);
1090 dump_line (struct xr_driver *xr, int x0, int y0, int x1, int y1, int style,
1091 const struct cell_color *color)
1093 cairo_new_path (xr->cairo);
1094 if (!xr->systemcolors)
1095 set_source_rgba (xr->cairo, color);
1096 cairo_set_line_width (
1098 xr_to_pt (style == RENDER_LINE_THICK ? XR_LINE_WIDTH * 2
1099 : style == RENDER_LINE_THIN ? XR_LINE_WIDTH / 2
1101 cairo_move_to (xr->cairo, xr_to_pt (x0 + xr->x), xr_to_pt (y0 + xr->y));
1102 cairo_line_to (xr->cairo, xr_to_pt (x1 + xr->x), xr_to_pt (y1 + xr->y));
1103 cairo_stroke (xr->cairo);
1107 dump_rectangle (struct xr_driver *xr, int x0, int y0, int x1, int y1)
1109 cairo_new_path (xr->cairo);
1110 cairo_set_line_width (xr->cairo, xr_to_pt (XR_LINE_WIDTH));
1111 cairo_move_to (xr->cairo, xr_to_pt (x0 + xr->x), xr_to_pt (y0 + xr->y));
1112 cairo_line_to (xr->cairo, xr_to_pt (x1 + xr->x), xr_to_pt (y0 + xr->y));
1113 cairo_line_to (xr->cairo, xr_to_pt (x1 + xr->x), xr_to_pt (y1 + xr->y));
1114 cairo_line_to (xr->cairo, xr_to_pt (x0 + xr->x), xr_to_pt (y1 + xr->y));
1115 cairo_close_path (xr->cairo);
1116 cairo_stroke (xr->cairo);
1120 fill_rectangle (struct xr_driver *xr, int x0, int y0, int x1, int y1)
1122 cairo_new_path (xr->cairo);
1123 cairo_set_line_width (xr->cairo, xr_to_pt (XR_LINE_WIDTH));
1124 cairo_rectangle (xr->cairo,
1125 xr_to_pt (x0 + xr->x), xr_to_pt (y0 + xr->y),
1126 xr_to_pt (x1 - x0), xr_to_pt (y1 - y0));
1127 cairo_fill (xr->cairo);
1130 /* Draws a horizontal line X0...X2 at Y if LEFT says so,
1131 shortening it to X0...X1 if SHORTEN is true.
1132 Draws a horizontal line X1...X3 at Y if RIGHT says so,
1133 shortening it to X2...X3 if SHORTEN is true. */
1135 horz_line (struct xr_driver *xr, int x0, int x1, int x2, int x3, int y,
1136 enum render_line_style left, enum render_line_style right,
1137 const struct cell_color *left_color,
1138 const struct cell_color *right_color,
1141 if (left != RENDER_LINE_NONE && right != RENDER_LINE_NONE && !shorten
1142 && cell_color_equal (left_color, right_color))
1143 dump_line (xr, x0, y, x3, y, left, left_color);
1146 if (left != RENDER_LINE_NONE)
1147 dump_line (xr, x0, y, shorten ? x1 : x2, y, left, left_color);
1148 if (right != RENDER_LINE_NONE)
1149 dump_line (xr, shorten ? x2 : x1, y, x3, y, right, right_color);
1153 /* Draws a vertical line Y0...Y2 at X if TOP says so,
1154 shortening it to Y0...Y1 if SHORTEN is true.
1155 Draws a vertical line Y1...Y3 at X if BOTTOM says so,
1156 shortening it to Y2...Y3 if SHORTEN is true. */
1158 vert_line (struct xr_driver *xr, int y0, int y1, int y2, int y3, int x,
1159 enum render_line_style top, enum render_line_style bottom,
1160 const struct cell_color *top_color,
1161 const struct cell_color *bottom_color,
1164 if (top != RENDER_LINE_NONE && bottom != RENDER_LINE_NONE && !shorten
1165 && cell_color_equal (top_color, bottom_color))
1166 dump_line (xr, x, y0, x, y3, top, top_color);
1169 if (top != RENDER_LINE_NONE)
1170 dump_line (xr, x, y0, x, shorten ? y1 : y2, top, top_color);
1171 if (bottom != RENDER_LINE_NONE)
1172 dump_line (xr, x, shorten ? y2 : y1, x, y3, bottom, bottom_color);
1177 xr_draw_line (void *xr_, int bb[TABLE_N_AXES][2],
1178 enum render_line_style styles[TABLE_N_AXES][2],
1179 struct cell_color colors[TABLE_N_AXES][2])
1181 const int x0 = bb[H][0];
1182 const int y0 = bb[V][0];
1183 const int x3 = bb[H][1];
1184 const int y3 = bb[V][1];
1185 const int top = styles[H][0];
1186 const int bottom = styles[H][1];
1188 int start_side = render_direction_rtl();
1189 int end_side = !start_side;
1190 const int start_of_line = styles[V][start_side];
1191 const int end_of_line = styles[V][end_side];
1192 const struct cell_color *top_color = &colors[H][0];
1193 const struct cell_color *bottom_color = &colors[H][1];
1194 const struct cell_color *start_color = &colors[V][start_side];
1195 const struct cell_color *end_color = &colors[V][end_side];
1197 /* The algorithm here is somewhat subtle, to allow it to handle
1198 all the kinds of intersections that we need.
1200 Three additional ordinates are assigned along the x axis. The
1201 first is xc, midway between x0 and x3. The others are x1 and
1202 x2; for a single vertical line these are equal to xc, and for
1203 a double vertical line they are the ordinates of the left and
1204 right half of the double line.
1206 yc, y1, and y2 are assigned similarly along the y axis.
1208 The following diagram shows the coordinate system and output
1209 for double top and bottom lines, single left line, and no
1213 y0 ________________________
1219 y1 = y2 = yc |######### # |
1224 y3 |________#_____#_______|
1226 struct xr_driver *xr = xr_;
1228 /* Offset from center of each line in a pair of double lines. */
1229 int double_line_ofs = (XR_LINE_SPACE + XR_LINE_WIDTH) / 2;
1231 /* Are the lines along each axis single or double?
1232 (It doesn't make sense to have different kinds of line on the
1233 same axis, so we don't try to gracefully handle that case.) */
1234 bool double_vert = top == RENDER_LINE_DOUBLE || bottom == RENDER_LINE_DOUBLE;
1235 bool double_horz = start_of_line == RENDER_LINE_DOUBLE || end_of_line == RENDER_LINE_DOUBLE;
1237 /* When horizontal lines are doubled,
1238 the left-side line along y1 normally runs from x0 to x2,
1239 and the right-side line along y1 from x3 to x1.
1240 If the top-side line is also doubled, we shorten the y1 lines,
1241 so that the left-side line runs only to x1,
1242 and the right-side line only to x2.
1243 Otherwise, the horizontal line at y = y1 below would cut off
1244 the intersection, which looks ugly:
1246 y0 ________________________
1251 y1 |######### ########|
1254 y2 |######################|
1257 y3 |______________________|
1258 It is more of a judgment call when the horizontal line is
1259 single. We actually choose to cut off the line anyhow, as
1260 shown in the first diagram above.
1262 bool shorten_y1_lines = top == RENDER_LINE_DOUBLE;
1263 bool shorten_y2_lines = bottom == RENDER_LINE_DOUBLE;
1264 bool shorten_yc_line = shorten_y1_lines && shorten_y2_lines;
1265 int horz_line_ofs = double_vert ? double_line_ofs : 0;
1266 int xc = (x0 + x3) / 2;
1267 int x1 = xc - horz_line_ofs;
1268 int x2 = xc + horz_line_ofs;
1270 bool shorten_x1_lines = start_of_line == RENDER_LINE_DOUBLE;
1271 bool shorten_x2_lines = end_of_line == RENDER_LINE_DOUBLE;
1272 bool shorten_xc_line = shorten_x1_lines && shorten_x2_lines;
1273 int vert_line_ofs = double_horz ? double_line_ofs : 0;
1274 int yc = (y0 + y3) / 2;
1275 int y1 = yc - vert_line_ofs;
1276 int y2 = yc + vert_line_ofs;
1279 horz_line (xr, x0, x1, x2, x3, yc, start_of_line, end_of_line,
1280 start_color, end_color, shorten_yc_line);
1283 horz_line (xr, x0, x1, x2, x3, y1, start_of_line, end_of_line,
1284 start_color, end_color, shorten_y1_lines);
1285 horz_line (xr, x0, x1, x2, x3, y2, start_of_line, end_of_line,
1286 start_color, end_color, shorten_y2_lines);
1290 vert_line (xr, y0, y1, y2, y3, xc, top, bottom, top_color, bottom_color,
1294 vert_line (xr, y0, y1, y2, y3, x1, top, bottom, top_color, bottom_color,
1296 vert_line (xr, y0, y1, y2, y3, x2, top, bottom, top_color, bottom_color,
1302 xr_measure_cell_width (void *xr_, const struct table_cell *cell,
1303 int *min_width, int *max_width)
1305 struct xr_driver *xr = xr_;
1306 int bb[TABLE_N_AXES][2];
1307 int clip[TABLE_N_AXES][2];
1314 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
1315 xr_layout_cell (xr, cell, bb, clip, max_width, &h, NULL);
1318 xr_layout_cell (xr, cell, bb, clip, min_width, &h, NULL);
1321 *min_width += px_to_xr (cell->style->cell_style.margin[H][0]
1322 + cell->style->cell_style.margin[H][1]);
1324 *max_width += px_to_xr (cell->style->cell_style.margin[H][0]
1325 + cell->style->cell_style.margin[H][1]);
1329 xr_measure_cell_height (void *xr_, const struct table_cell *cell, int width)
1331 struct xr_driver *xr = xr_;
1332 int bb[TABLE_N_AXES][2];
1333 int clip[TABLE_N_AXES][2];
1337 bb[H][1] = width - px_to_xr (cell->style->cell_style.margin[H][0]
1338 + cell->style->cell_style.margin[H][1]);
1341 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
1342 xr_layout_cell (xr, cell, bb, clip, &w, &h, NULL);
1343 h += px_to_xr (cell->style->cell_style.margin[V][0]
1344 + cell->style->cell_style.margin[V][1]);
1348 static void xr_clip (struct xr_driver *, int clip[TABLE_N_AXES][2]);
1351 xr_draw_cell (void *xr_, const struct table_cell *cell, int color_idx,
1352 int bb[TABLE_N_AXES][2], int valign_offset,
1353 int spill[TABLE_N_AXES][2],
1354 int clip[TABLE_N_AXES][2])
1356 struct xr_driver *xr = xr_;
1359 if (!xr->transparent)
1361 cairo_save (xr->cairo);
1362 int bg_clip[TABLE_N_AXES][2];
1363 for (int axis = 0; axis < TABLE_N_AXES; axis++)
1365 bg_clip[axis][0] = clip[axis][0];
1366 if (bb[axis][0] == clip[axis][0])
1367 bg_clip[axis][0] -= spill[axis][0];
1369 bg_clip[axis][1] = clip[axis][1];
1370 if (bb[axis][1] == clip[axis][1])
1371 bg_clip[axis][1] += spill[axis][1];
1373 xr_clip (xr, bg_clip);
1374 set_source_rgba (xr->cairo, &cell->style->font_style.bg[color_idx]);
1376 bb[H][0] - spill[H][0],
1377 bb[V][0] - spill[V][0],
1378 bb[H][1] + spill[H][1],
1379 bb[V][1] + spill[V][1]);
1380 cairo_restore (xr->cairo);
1382 cairo_save (xr->cairo);
1383 if (!xr->systemcolors)
1384 set_source_rgba (xr->cairo, &cell->style->font_style.fg[color_idx]);
1386 bb[V][0] += valign_offset;
1388 for (int axis = 0; axis < TABLE_N_AXES; axis++)
1390 bb[axis][0] += px_to_xr (cell->style->cell_style.margin[axis][0]);
1391 bb[axis][1] -= px_to_xr (cell->style->cell_style.margin[axis][1]);
1393 if (bb[H][0] < bb[H][1] && bb[V][0] < bb[V][1])
1394 xr_layout_cell (xr, cell, bb, clip, &w, &h, &brk);
1395 cairo_restore (xr->cairo);
1399 xr_adjust_break (void *xr_, const struct table_cell *cell,
1400 int width, int height)
1402 struct xr_driver *xr = xr_;
1403 int bb[TABLE_N_AXES][2];
1404 int clip[TABLE_N_AXES][2];
1407 if (xr_measure_cell_height (xr_, cell, width) < height)
1411 bb[H][1] = width - px_to_xr (cell->style->cell_style.margin[H][0]
1412 + cell->style->cell_style.margin[H][1]);
1416 bb[V][1] = height - px_to_xr (cell->style->cell_style.margin[V][0]
1417 + cell->style->cell_style.margin[V][1]);
1418 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
1419 xr_layout_cell (xr, cell, bb, clip, &w, &h, &brk);
1424 xr_clip (struct xr_driver *xr, int clip[TABLE_N_AXES][2])
1426 if (clip[H][1] != INT_MAX || clip[V][1] != INT_MAX)
1428 double x0 = xr_to_pt (clip[H][0] + xr->x);
1429 double y0 = xr_to_pt (clip[V][0] + xr->y);
1430 double x1 = xr_to_pt (clip[H][1] + xr->x);
1431 double y1 = xr_to_pt (clip[V][1] + xr->y);
1433 cairo_rectangle (xr->cairo, x0, y0, x1 - x0, y1 - y0);
1434 cairo_clip (xr->cairo);
1439 add_attr (PangoAttrList *list, PangoAttribute *attr,
1440 guint start_index, guint end_index)
1442 attr->start_index = start_index;
1443 attr->end_index = end_index;
1444 pango_attr_list_insert (list, attr);
1448 markup_escape (struct string *out, unsigned int options,
1449 const char *in, size_t len)
1451 if (!(options & TAB_MARKUP))
1453 ds_put_substring (out, ss_buffer (in, len == -1 ? strlen (in) : len));
1465 ds_put_cstr (out, "&");
1468 ds_put_cstr (out, "<");
1471 ds_put_cstr (out, ">");
1474 ds_put_byte (out, c);
1481 get_layout_dimension (PangoLayout *layout, enum table_axis axis)
1483 int size[TABLE_N_AXES];
1484 pango_layout_get_size (layout, &size[H], &size[V]);
1489 xr_layout_cell_text (struct xr_driver *xr, const struct table_cell *cell,
1490 int bb[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
1491 int *widthp, int *brk)
1493 const struct font_style *font_style = &cell->style->font_style;
1494 const struct cell_style *cell_style = &cell->style->cell_style;
1495 unsigned int options = cell->options;
1497 enum table_axis X = options & TAB_ROTATE ? V : H;
1498 enum table_axis Y = !X;
1499 int R = options & TAB_ROTATE ? 0 : 1;
1501 struct xr_font *font = (options & TAB_FIX ? &xr->fonts[XR_FONT_FIXED]
1502 : &xr->fonts[XR_FONT_PROPORTIONAL]);
1503 struct xr_font local_font;
1504 if (font_style->typeface)
1506 PangoFontDescription *desc = parse_font (
1507 font_style->typeface,
1508 font_style->size ? font_style->size * 1000 * xr->font_scale : 10000,
1509 font_style->bold, font_style->italic);
1512 PangoLayout *layout = pango_cairo_create_layout (xr->cairo);
1513 pango_layout_set_font_description (layout, desc);
1515 local_font.desc = desc;
1516 local_font.layout = layout;
1521 const char *text = cell->text;
1522 enum table_halign halign = table_halign_interpret (
1523 cell_style->halign, cell->options & TAB_NUMERIC);
1524 if (cell_style->halign == TABLE_HALIGN_DECIMAL && !(options & TAB_ROTATE))
1526 int margin_adjustment = -px_to_xr (cell_style->decimal_offset);
1528 const char *decimal = strrchr (text, cell_style->decimal_char);
1531 pango_layout_set_text (font->layout, decimal, strlen (decimal));
1532 pango_layout_set_width (font->layout, -1);
1533 margin_adjustment += get_layout_dimension (font->layout, H);
1536 if (margin_adjustment < 0)
1537 bb[H][1] += margin_adjustment;
1540 struct string tmp = DS_EMPTY_INITIALIZER;
1541 PangoAttrList *attrs = NULL;
1543 /* Deal with an oddity of the Unicode line-breaking algorithm (or perhaps in
1544 Pango's implementation of it): it will break after a period or a comma
1545 that precedes a digit, e.g. in ".000" it will break after the period.
1546 This code looks for such a situation and inserts a U+2060 WORD JOINER
1547 to prevent the break.
1549 This isn't necessary when the decimal point is between two digits
1550 (e.g. "0.000" won't be broken) or when the display width is not limited so
1551 that word wrapping won't happen.
1553 It isn't necessary to look for more than one period or comma, as would
1554 happen with grouping like 1,234,567.89 or 1.234.567,89 because if groups
1555 are present then there will always be a digit on both sides of every
1556 period and comma. */
1557 if (options & TAB_MARKUP)
1559 PangoAttrList *new_attrs;
1561 if (pango_parse_markup (text, -1, 0, &new_attrs, &new_text, NULL, NULL))
1564 tmp.ss = ss_cstr (new_text);
1565 tmp.capacity = tmp.ss.length;
1569 /* XXX should we report the error? */
1570 ds_put_cstr (&tmp, text);
1573 else if (options & TAB_ROTATE || bb[H][1] != INT_MAX)
1575 const char *decimal = text + strcspn (text, ".,");
1577 && c_isdigit (decimal[1])
1578 && (decimal == text || !c_isdigit (decimal[-1])))
1580 ds_extend (&tmp, strlen (text) + 16);
1581 markup_escape (&tmp, options, text, decimal - text + 1);
1582 ds_put_unichar (&tmp, 0x2060 /* U+2060 WORD JOINER */);
1583 markup_escape (&tmp, options, decimal + 1, -1);
1587 if (font_style->underline)
1590 attrs = pango_attr_list_new ();
1591 pango_attr_list_insert (attrs, pango_attr_underline_new (
1592 PANGO_UNDERLINE_SINGLE));
1595 if (cell->n_footnotes || cell->n_subscripts || cell->superscript)
1597 /* If we haven't already put TEXT into tmp, do it now. */
1598 if (ds_is_empty (&tmp))
1600 ds_extend (&tmp, strlen (text) + 16);
1601 markup_escape (&tmp, options, text, -1);
1604 size_t subscript_ofs = ds_length (&tmp);
1605 for (size_t i = 0; i < cell->n_subscripts; i++)
1608 ds_put_byte (&tmp, ',');
1609 ds_put_cstr (&tmp, cell->subscripts[i]);
1612 size_t superscript_ofs = ds_length (&tmp);
1613 if (cell->superscript)
1614 ds_put_cstr (&tmp, cell->superscript);
1616 size_t footnote_ofs = ds_length (&tmp);
1617 for (size_t i = 0; i < cell->n_footnotes; i++)
1620 ds_put_byte (&tmp, ',');
1621 ds_put_cstr (&tmp, cell->footnotes[i]->marker);
1624 /* Allow footnote markers to occupy the right margin. That way, numbers
1625 in the column are still aligned. */
1626 if (cell->n_footnotes && halign == TABLE_HALIGN_RIGHT)
1628 /* Measure the width of the footnote marker, so we know how much we
1629 need to make room for. */
1630 pango_layout_set_text (font->layout, ds_cstr (&tmp) + footnote_ofs,
1631 ds_length (&tmp) - footnote_ofs);
1633 PangoAttrList *fn_attrs = pango_attr_list_new ();
1634 pango_attr_list_insert (
1635 fn_attrs, pango_attr_scale_new (PANGO_SCALE_SMALL));
1636 pango_attr_list_insert (fn_attrs, pango_attr_rise_new (3000));
1637 pango_layout_set_attributes (font->layout, fn_attrs);
1638 pango_attr_list_unref (fn_attrs);
1639 int footnote_width = get_layout_dimension (font->layout, X);
1641 /* Bound the adjustment by the width of the right margin. */
1642 int right_margin = px_to_xr (cell_style->margin[X][R]);
1643 int footnote_adjustment = MIN (footnote_width, right_margin);
1645 /* Adjust the bounding box. */
1646 if (options & TAB_ROTATE)
1647 footnote_adjustment = -footnote_adjustment;
1648 bb[X][R] += footnote_adjustment;
1651 pango_layout_set_attributes (font->layout, NULL);
1654 /* Set attributes. */
1656 attrs = pango_attr_list_new ();
1657 add_attr (attrs, pango_attr_font_desc_new (font->desc), subscript_ofs,
1658 PANGO_ATTR_INDEX_TO_TEXT_END);
1659 add_attr (attrs, pango_attr_scale_new (PANGO_SCALE_SMALL),
1660 subscript_ofs, PANGO_ATTR_INDEX_TO_TEXT_END);
1661 if (cell->n_subscripts)
1662 add_attr (attrs, pango_attr_rise_new (-3000), subscript_ofs,
1663 superscript_ofs - subscript_ofs);
1664 if (cell->superscript || cell->n_footnotes)
1665 add_attr (attrs, pango_attr_rise_new (3000), superscript_ofs,
1666 PANGO_ATTR_INDEX_TO_TEXT_END);
1669 /* Set the attributes, if any. */
1672 pango_layout_set_attributes (font->layout, attrs);
1673 pango_attr_list_unref (attrs);
1677 if (ds_is_empty (&tmp))
1678 pango_layout_set_text (font->layout, text, -1);
1680 pango_layout_set_text (font->layout, ds_cstr (&tmp), ds_length (&tmp));
1683 pango_layout_set_alignment (font->layout,
1684 (halign == TABLE_HALIGN_RIGHT ? PANGO_ALIGN_RIGHT
1685 : halign == TABLE_HALIGN_LEFT ? PANGO_ALIGN_LEFT
1686 : PANGO_ALIGN_CENTER));
1687 pango_layout_set_width (
1689 bb[X][1] == INT_MAX ? -1 : xr_to_pango (bb[X][1] - bb[X][0]));
1690 pango_layout_set_wrap (font->layout, PANGO_WRAP_WORD);
1692 if (clip[H][0] != clip[H][1])
1694 cairo_save (xr->cairo);
1695 if (!(options & TAB_ROTATE))
1697 if (options & TAB_ROTATE)
1699 cairo_translate (xr->cairo,
1700 xr_to_pt (bb[H][0] + xr->x),
1701 xr_to_pt (bb[V][1] + xr->y));
1702 cairo_rotate (xr->cairo, -M_PI_2);
1705 cairo_translate (xr->cairo,
1706 xr_to_pt (bb[H][0] + xr->x),
1707 xr_to_pt (bb[V][0] + xr->y));
1708 pango_cairo_show_layout (xr->cairo, font->layout);
1710 /* If enabled, this draws a blue rectangle around the extents of each
1711 line of text, which can be rather useful for debugging layout
1715 PangoLayoutIter *iter;
1716 iter = pango_layout_get_iter (font->layout);
1719 PangoRectangle extents;
1721 pango_layout_iter_get_line_extents (iter, &extents, NULL);
1722 cairo_save (xr->cairo);
1723 cairo_set_source_rgb (xr->cairo, 1, 0, 0);
1725 pango_to_xr (extents.x) - xr->x,
1726 pango_to_xr (extents.y) - xr->y,
1727 pango_to_xr (extents.x + extents.width) - xr->x,
1728 pango_to_xr (extents.y + extents.height) - xr->y);
1729 cairo_restore (xr->cairo);
1731 while (pango_layout_iter_next_line (iter));
1732 pango_layout_iter_free (iter);
1735 cairo_restore (xr->cairo);
1738 int size[TABLE_N_AXES];
1739 pango_layout_get_size (font->layout, &size[H], &size[V]);
1740 int w = pango_to_xr (size[X]);
1741 int h = pango_to_xr (size[Y]);
1744 if (bb[V][0] + h >= bb[V][1] && !(options & TAB_ROTATE))
1746 PangoLayoutIter *iter;
1749 /* Choose a breakpoint between lines instead of in the middle of one. */
1750 iter = pango_layout_get_iter (font->layout);
1753 PangoRectangle extents;
1757 pango_layout_iter_get_line_extents (iter, NULL, &extents);
1758 pango_layout_iter_get_line_yrange (iter, &y0, &y1);
1759 extents.x = pango_to_xr (extents.x);
1760 extents.y = pango_to_xr (y0);
1761 extents.width = pango_to_xr (extents.width);
1762 extents.height = pango_to_xr (y1 - y0);
1763 bottom = bb[V][0] + extents.y + extents.height;
1764 if (bottom < bb[V][1])
1766 if (brk && clip[H][0] != clip[H][1])
1774 while (pango_layout_iter_next_line (iter));
1775 pango_layout_iter_free (iter);
1777 /* If enabled, draws a green line across the chosen breakpoint, which can
1778 be useful for debugging issues with breaking. */
1782 dump_line (xr, -xr->left_margin, best,
1783 xr->width + xr->right_margin, best,
1785 &(struct cell_color) CELL_COLOR (0, 255, 0));
1789 pango_layout_set_attributes (font->layout, NULL);
1791 if (font == &local_font)
1793 g_object_unref (G_OBJECT (font->layout));
1794 pango_font_description_free (font->desc);
1801 xr_layout_cell (struct xr_driver *xr, const struct table_cell *cell,
1802 int bb[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
1803 int *width, int *height, int *brk)
1808 /* If enabled, draws a blue rectangle around the cell extents, which can be
1809 useful for debugging layout. */
1812 if (clip[H][0] != clip[H][1])
1814 cairo_save (xr->cairo);
1815 cairo_set_source_rgb (xr->cairo, 0, 0, 1);
1816 dump_rectangle (xr, bb[H][0], bb[V][0], bb[H][1], bb[V][1]);
1817 cairo_restore (xr->cairo);
1823 *height = xr_layout_cell_text (xr, cell, bb, clip, width, brk);
1826 struct output_driver_factory pdf_driver_factory =
1827 { "pdf", "pspp.pdf", xr_pdf_create };
1828 struct output_driver_factory ps_driver_factory =
1829 { "ps", "pspp.ps", xr_ps_create };
1830 struct output_driver_factory svg_driver_factory =
1831 { "svg", "pspp.svg", xr_svg_create };
1833 static const struct output_driver_class cairo_driver_class =
1841 /* GUI rendering helpers. */
1845 struct output_item *item;
1848 struct render_pager *p;
1849 struct xr_driver *xr;
1852 #define CHART_WIDTH 500
1853 #define CHART_HEIGHT 375
1858 xr_driver_create (cairo_t *cairo, struct string_map *options)
1860 struct xr_driver *xr = xr_allocate ("cairo", 0, options, 1.0);
1861 xr_set_cairo (xr, cairo);
1865 /* Destroy XR, which should have been created with xr_driver_create(). Any
1866 cairo_t added to XR is not destroyed, because it is owned by the client. */
1868 xr_driver_destroy (struct xr_driver *xr)
1873 output_driver_destroy (&xr->driver);
1877 static struct xr_rendering *
1878 xr_rendering_create_text (struct xr_driver *xr, const char *text, cairo_t *cr)
1880 struct table_item *table_item;
1881 struct xr_rendering *r;
1883 table_item = table_item_create (table_from_string (text), NULL, NULL);
1884 r = xr_rendering_create (xr, &table_item->output_item, cr);
1885 table_item_unref (table_item);
1891 xr_rendering_apply_options (struct xr_rendering *xr, struct string_map *o)
1893 if (is_table_item (xr->item))
1894 apply_options (xr->xr, o);
1897 struct xr_rendering *
1898 xr_rendering_create (struct xr_driver *xr, const struct output_item *item,
1901 struct xr_rendering *r = NULL;
1903 if (is_text_item (item))
1904 r = xr_rendering_create_text (xr, text_item_get_text (to_text_item (item)),
1906 else if (is_message_item (item))
1908 const struct message_item *message_item = to_message_item (item);
1909 char *s = msg_to_string (message_item_get_msg (message_item));
1910 r = xr_rendering_create_text (xr, s, cr);
1913 else if (is_table_item (item))
1915 r = xzalloc (sizeof *r);
1916 r->item = output_item_ref (item);
1918 xr_set_cairo (xr, cr);
1919 r->p = render_pager_create (xr->params, to_table_item (item));
1921 else if (is_chart_item (item))
1923 r = xzalloc (sizeof *r);
1924 r->item = output_item_ref (item);
1926 else if (is_group_open_item (item))
1927 r = xr_rendering_create_text (xr, to_group_open_item (item)->command_name,
1934 xr_rendering_destroy (struct xr_rendering *r)
1938 output_item_unref (r->item);
1939 render_pager_destroy (r->p);
1945 xr_rendering_measure (const struct xr_rendering *r, int *wp, int *hp)
1949 if (is_table_item (r->item))
1951 w = render_pager_get_size (r->p, H) / XR_POINT;
1952 h = render_pager_get_size (r->p, V) / XR_POINT;
1966 static void xr_draw_chart (const struct chart_item *, cairo_t *,
1967 double x, double y, double width, double height);
1971 xr_rendering_draw (struct xr_rendering *r, cairo_t *cr,
1972 int x0, int y0, int x1, int y1)
1974 if (is_table_item (r->item))
1976 struct xr_driver *xr = r->xr;
1978 xr_set_cairo (xr, cr);
1980 render_pager_draw_region (r->p, x0 * XR_POINT, y0 * XR_POINT,
1981 (x1 - x0) * XR_POINT, (y1 - y0) * XR_POINT);
1984 xr_draw_chart (to_chart_item (r->item), cr,
1985 0, 0, CHART_WIDTH, CHART_HEIGHT);
1989 xr_draw_chart (const struct chart_item *chart_item, cairo_t *cr,
1990 double x, double y, double width, double height)
1992 struct xrchart_geometry geom;
1995 cairo_translate (cr, x, y + height);
1996 cairo_scale (cr, 1.0, -1.0);
1997 xrchart_geometry_init (cr, &geom, width, height);
1998 if (is_boxplot (chart_item))
1999 xrchart_draw_boxplot (chart_item, cr, &geom);
2000 else if (is_histogram_chart (chart_item))
2001 xrchart_draw_histogram (chart_item, cr, &geom);
2002 else if (is_np_plot_chart (chart_item))
2003 xrchart_draw_np_plot (chart_item, cr, &geom);
2004 else if (is_piechart (chart_item))
2005 xrchart_draw_piechart (chart_item, cr, &geom);
2006 else if (is_barchart (chart_item))
2007 xrchart_draw_barchart (chart_item, cr, &geom);
2008 else if (is_roc_chart (chart_item))
2009 xrchart_draw_roc (chart_item, cr, &geom);
2010 else if (is_scree (chart_item))
2011 xrchart_draw_scree (chart_item, cr, &geom);
2012 else if (is_spreadlevel_plot_chart (chart_item))
2013 xrchart_draw_spreadlevel (chart_item, cr, &geom);
2014 else if (is_scatterplot_chart (chart_item))
2015 xrchart_draw_scatterplot (chart_item, cr, &geom);
2018 xrchart_geometry_free (cr, &geom);
2024 xr_draw_png_chart (const struct chart_item *item,
2025 const char *file_name_template, int number,
2026 const struct cell_color *fg,
2027 const struct cell_color *bg)
2029 const int width = 640;
2030 const int length = 480;
2032 cairo_surface_t *surface;
2033 cairo_status_t status;
2034 const char *number_pos;
2038 number_pos = strchr (file_name_template, '#');
2039 if (number_pos != NULL)
2040 file_name = xasprintf ("%.*s%d%s.png", (int) (number_pos - file_name_template),
2041 file_name_template, number, number_pos + 1);
2043 file_name = xasprintf ("%s.png", file_name_template);
2045 surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, length);
2046 cr = cairo_create (surface);
2048 cairo_set_source_rgb (cr, bg->r / 255.0, bg->g / 255.0, bg->b / 255.0);
2051 cairo_set_source_rgb (cr, fg->r / 255.0, fg->g / 255.0, fg->b / 255.0);
2053 xr_draw_chart (item, cr, 0.0, 0.0, width, length);
2055 status = cairo_surface_write_to_png (surface, file_name);
2056 if (status != CAIRO_STATUS_SUCCESS)
2057 msg (ME, _("error writing output file `%s': %s"),
2058 file_name, cairo_status_to_string (status));
2061 cairo_surface_destroy (surface);
2068 xr_draw_eps_chart (const struct chart_item *item,
2069 const char *file_name_template, int number,
2070 const struct cell_color *fg,
2071 const struct cell_color *bg)
2073 const int width = 640;
2074 const int length = 480;
2076 cairo_surface_t *surface;
2077 const char *number_pos;
2081 number_pos = strchr (file_name_template, '#');
2082 if (number_pos != NULL)
2083 file_name = xasprintf ("%.*s%d%s.eps", (int) (number_pos - file_name_template),
2084 file_name_template, number, number_pos + 1);
2086 file_name = xasprintf ("%s.eps", file_name_template);
2088 surface = cairo_ps_surface_create (file_name, width, length);
2089 cairo_ps_surface_set_eps (surface, true);
2090 cr = cairo_create (surface);
2092 cairo_set_source_rgb (cr, bg->r / 255.0, bg->g / 255.0, bg->b / 255.0);
2095 cairo_set_source_rgb (cr, fg->r / 255.0, fg->g / 255.0, fg->b / 255.0);
2097 xr_draw_chart (item, cr, 0.0, 0.0, width, length);
2100 cairo_surface_destroy (surface);
2107 struct xr_table_state
2109 struct xr_render_fsm fsm;
2110 struct render_pager *p;
2114 xr_table_render (struct xr_render_fsm *fsm, struct xr_driver *xr)
2116 struct xr_table_state *ts = UP_CAST (fsm, struct xr_table_state, fsm);
2118 while (render_pager_has_next (ts->p))
2122 used = render_pager_draw_next (ts->p, xr->length - xr->y);
2135 xr_table_destroy (struct xr_render_fsm *fsm)
2137 struct xr_table_state *ts = UP_CAST (fsm, struct xr_table_state, fsm);
2139 render_pager_destroy (ts->p);
2143 static struct xr_render_fsm *
2144 xr_render_table (struct xr_driver *xr, struct table_item *table_item)
2146 struct xr_table_state *ts;
2148 ts = xmalloc (sizeof *ts);
2149 ts->fsm.render = xr_table_render;
2150 ts->fsm.destroy = xr_table_destroy;
2153 xr->y += xr->char_height;
2155 ts->p = render_pager_create (xr->params, table_item);
2156 table_item_unref (table_item);
2161 struct xr_chart_state
2163 struct xr_render_fsm fsm;
2164 struct chart_item *chart_item;
2168 xr_chart_render (struct xr_render_fsm *fsm, struct xr_driver *xr)
2170 struct xr_chart_state *cs = UP_CAST (fsm, struct xr_chart_state, fsm);
2172 const int chart_height = 0.8 * (xr->length < xr->width ? xr->length : xr->width);
2174 if (xr->y > xr->length - chart_height)
2177 if (xr->cairo != NULL)
2179 xr_draw_chart (cs->chart_item, xr->cairo,
2182 xr_to_pt (xr->width),
2183 xr_to_pt (chart_height));
2185 xr->y += chart_height;
2191 xr_chart_destroy (struct xr_render_fsm *fsm)
2193 struct xr_chart_state *cs = UP_CAST (fsm, struct xr_chart_state, fsm);
2195 chart_item_unref (cs->chart_item);
2199 static struct xr_render_fsm *
2200 xr_render_chart (const struct chart_item *chart_item)
2202 struct xr_chart_state *cs;
2204 cs = xmalloc (sizeof *cs);
2205 cs->fsm.render = xr_chart_render;
2206 cs->fsm.destroy = xr_chart_destroy;
2207 cs->chart_item = chart_item_ref (chart_item);
2213 xr_eject_render (struct xr_render_fsm *fsm UNUSED, struct xr_driver *xr)
2219 xr_eject_destroy (struct xr_render_fsm *fsm UNUSED)
2221 /* Nothing to do. */
2224 static struct xr_render_fsm *
2225 xr_render_eject (void)
2227 static struct xr_render_fsm eject_renderer =
2233 return &eject_renderer;
2236 static struct xr_render_fsm *
2237 xr_render_text (struct xr_driver *xr, const struct text_item *text_item)
2239 enum text_item_type type = text_item_get_type (text_item);
2240 const char *text = text_item_get_text (text_item);
2244 case TEXT_ITEM_PAGE_TITLE:
2245 string_map_replace (&xr->heading_vars, "PageTitle", text);
2248 case TEXT_ITEM_EJECT_PAGE:
2250 return xr_render_eject ();
2254 return xr_render_table (
2255 xr, text_item_to_table_item (text_item_ref (text_item)));
2261 static struct xr_render_fsm *
2262 xr_render_message (struct xr_driver *xr,
2263 const struct message_item *message_item)
2265 char *s = msg_to_string (message_item_get_msg (message_item));
2266 struct text_item *item = text_item_create (TEXT_ITEM_LOG, s);
2268 return xr_render_table (xr, text_item_to_table_item (item));
2271 static struct xr_render_fsm *
2272 xr_render_output_item (struct xr_driver *xr,
2273 const struct output_item *output_item)
2275 if (is_table_item (output_item))
2276 return xr_render_table (xr, table_item_ref (to_table_item (output_item)));
2277 else if (is_chart_item (output_item))
2278 return xr_render_chart (to_chart_item (output_item));
2279 else if (is_text_item (output_item))
2280 return xr_render_text (xr, to_text_item (output_item));
2281 else if (is_message_item (output_item))
2282 return xr_render_message (xr, to_message_item (output_item));
2288 xr_draw_svg_file (struct xr_rendering *r,
2289 const char *filename)
2293 xr_rendering_measure (r, &width, &height);
2294 cairo_surface_t *surface = cairo_svg_surface_create (filename, width, height);
2297 g_error ("Could not create cairo svg surface with file %s", filename);
2300 cairo_t *cr = cairo_create (surface);
2301 xr_rendering_draw (r, cr, 0, 0, width, height);
2303 cairo_surface_destroy (surface);