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;
172 cairo_surface_t *surface;
173 int page_number; /* Current page number. */
175 struct xr_render_fsm *fsm;
176 struct string_map heading_vars;
179 static const struct output_driver_class cairo_driver_class;
181 static void xr_driver_destroy_fsm (struct xr_driver *);
182 static void xr_driver_run_fsm (struct xr_driver *);
184 static void xr_draw_line (void *, int bb[TABLE_N_AXES][2],
185 enum render_line_style styles[TABLE_N_AXES][2],
186 struct cell_color colors[TABLE_N_AXES][2]);
187 static void xr_measure_cell_width (void *, const struct table_cell *,
189 static int xr_measure_cell_height (void *, const struct table_cell *,
191 static void xr_draw_cell (void *, const struct table_cell *, int color_idx,
192 int bb[TABLE_N_AXES][2], int valign_offset,
193 int spill[TABLE_N_AXES][2],
194 int clip[TABLE_N_AXES][2]);
195 static int xr_adjust_break (void *, const struct table_cell *,
196 int width, int height);
198 static struct xr_render_fsm *xr_render_output_item (
199 struct xr_driver *, const struct output_item *);
201 /* Output driver basics. */
203 static struct xr_driver *
204 xr_driver_cast (struct output_driver *driver)
206 assert (driver->class == &cairo_driver_class);
207 return UP_CAST (driver, struct xr_driver, driver);
210 static struct driver_option *
211 opt (struct output_driver *d, struct string_map *options, const char *key,
212 const char *default_value)
214 return driver_option_get (d, options, key, default_value);
218 lookup_color_name (const char *s)
222 struct hmap_node hmap_node;
227 static struct color colors[] =
229 { .name = "aliceblue", .code = 0xf0f8ff },
230 { .name = "antiquewhite", .code = 0xfaebd7 },
231 { .name = "aqua", .code = 0x00ffff },
232 { .name = "aquamarine", .code = 0x7fffd4 },
233 { .name = "azure", .code = 0xf0ffff },
234 { .name = "beige", .code = 0xf5f5dc },
235 { .name = "bisque", .code = 0xffe4c4 },
236 { .name = "black", .code = 0x000000 },
237 { .name = "blanchedalmond", .code = 0xffebcd },
238 { .name = "blue", .code = 0x0000ff },
239 { .name = "blueviolet", .code = 0x8a2be2 },
240 { .name = "brown", .code = 0xa52a2a },
241 { .name = "burlywood", .code = 0xdeb887 },
242 { .name = "cadetblue", .code = 0x5f9ea0 },
243 { .name = "chartreuse", .code = 0x7fff00 },
244 { .name = "chocolate", .code = 0xd2691e },
245 { .name = "coral", .code = 0xff7f50 },
246 { .name = "cornflowerblue", .code = 0x6495ed },
247 { .name = "cornsilk", .code = 0xfff8dc },
248 { .name = "crimson", .code = 0xdc143c },
249 { .name = "cyan", .code = 0x00ffff },
250 { .name = "darkblue", .code = 0x00008b },
251 { .name = "darkcyan", .code = 0x008b8b },
252 { .name = "darkgoldenrod", .code = 0xb8860b },
253 { .name = "darkgray", .code = 0xa9a9a9 },
254 { .name = "darkgreen", .code = 0x006400 },
255 { .name = "darkgrey", .code = 0xa9a9a9 },
256 { .name = "darkkhaki", .code = 0xbdb76b },
257 { .name = "darkmagenta", .code = 0x8b008b },
258 { .name = "darkolivegreen", .code = 0x556b2f },
259 { .name = "darkorange", .code = 0xff8c00 },
260 { .name = "darkorchid", .code = 0x9932cc },
261 { .name = "darkred", .code = 0x8b0000 },
262 { .name = "darksalmon", .code = 0xe9967a },
263 { .name = "darkseagreen", .code = 0x8fbc8f },
264 { .name = "darkslateblue", .code = 0x483d8b },
265 { .name = "darkslategray", .code = 0x2f4f4f },
266 { .name = "darkslategrey", .code = 0x2f4f4f },
267 { .name = "darkturquoise", .code = 0x00ced1 },
268 { .name = "darkviolet", .code = 0x9400d3 },
269 { .name = "deeppink", .code = 0xff1493 },
270 { .name = "deepskyblue", .code = 0x00bfff },
271 { .name = "dimgray", .code = 0x696969 },
272 { .name = "dimgrey", .code = 0x696969 },
273 { .name = "dodgerblue", .code = 0x1e90ff },
274 { .name = "firebrick", .code = 0xb22222 },
275 { .name = "floralwhite", .code = 0xfffaf0 },
276 { .name = "forestgreen", .code = 0x228b22 },
277 { .name = "fuchsia", .code = 0xff00ff },
278 { .name = "gainsboro", .code = 0xdcdcdc },
279 { .name = "ghostwhite", .code = 0xf8f8ff },
280 { .name = "gold", .code = 0xffd700 },
281 { .name = "goldenrod", .code = 0xdaa520 },
282 { .name = "gray", .code = 0x808080 },
283 { .name = "green", .code = 0x008000 },
284 { .name = "greenyellow", .code = 0xadff2f },
285 { .name = "grey", .code = 0x808080 },
286 { .name = "honeydew", .code = 0xf0fff0 },
287 { .name = "hotpink", .code = 0xff69b4 },
288 { .name = "indianred", .code = 0xcd5c5c },
289 { .name = "indigo", .code = 0x4b0082 },
290 { .name = "ivory", .code = 0xfffff0 },
291 { .name = "khaki", .code = 0xf0e68c },
292 { .name = "lavender", .code = 0xe6e6fa },
293 { .name = "lavenderblush", .code = 0xfff0f5 },
294 { .name = "lawngreen", .code = 0x7cfc00 },
295 { .name = "lemonchiffon", .code = 0xfffacd },
296 { .name = "lightblue", .code = 0xadd8e6 },
297 { .name = "lightcoral", .code = 0xf08080 },
298 { .name = "lightcyan", .code = 0xe0ffff },
299 { .name = "lightgoldenrodyellow", .code = 0xfafad2 },
300 { .name = "lightgray", .code = 0xd3d3d3 },
301 { .name = "lightgreen", .code = 0x90ee90 },
302 { .name = "lightgrey", .code = 0xd3d3d3 },
303 { .name = "lightpink", .code = 0xffb6c1 },
304 { .name = "lightsalmon", .code = 0xffa07a },
305 { .name = "lightseagreen", .code = 0x20b2aa },
306 { .name = "lightskyblue", .code = 0x87cefa },
307 { .name = "lightslategray", .code = 0x778899 },
308 { .name = "lightslategrey", .code = 0x778899 },
309 { .name = "lightsteelblue", .code = 0xb0c4de },
310 { .name = "lightyellow", .code = 0xffffe0 },
311 { .name = "lime", .code = 0x00ff00 },
312 { .name = "limegreen", .code = 0x32cd32 },
313 { .name = "linen", .code = 0xfaf0e6 },
314 { .name = "magenta", .code = 0xff00ff },
315 { .name = "maroon", .code = 0x800000 },
316 { .name = "mediumaquamarine", .code = 0x66cdaa },
317 { .name = "mediumblue", .code = 0x0000cd },
318 { .name = "mediumorchid", .code = 0xba55d3 },
319 { .name = "mediumpurple", .code = 0x9370db },
320 { .name = "mediumseagreen", .code = 0x3cb371 },
321 { .name = "mediumslateblue", .code = 0x7b68ee },
322 { .name = "mediumspringgreen", .code = 0x00fa9a },
323 { .name = "mediumturquoise", .code = 0x48d1cc },
324 { .name = "mediumvioletred", .code = 0xc71585 },
325 { .name = "midnightblue", .code = 0x191970 },
326 { .name = "mintcream", .code = 0xf5fffa },
327 { .name = "mistyrose", .code = 0xffe4e1 },
328 { .name = "moccasin", .code = 0xffe4b5 },
329 { .name = "navajowhite", .code = 0xffdead },
330 { .name = "navy", .code = 0x000080 },
331 { .name = "oldlace", .code = 0xfdf5e6 },
332 { .name = "olive", .code = 0x808000 },
333 { .name = "olivedrab", .code = 0x6b8e23 },
334 { .name = "orange", .code = 0xffa500 },
335 { .name = "orangered", .code = 0xff4500 },
336 { .name = "orchid", .code = 0xda70d6 },
337 { .name = "palegoldenrod", .code = 0xeee8aa },
338 { .name = "palegreen", .code = 0x98fb98 },
339 { .name = "paleturquoise", .code = 0xafeeee },
340 { .name = "palevioletred", .code = 0xdb7093 },
341 { .name = "papayawhip", .code = 0xffefd5 },
342 { .name = "peachpuff", .code = 0xffdab9 },
343 { .name = "peru", .code = 0xcd853f },
344 { .name = "pink", .code = 0xffc0cb },
345 { .name = "plum", .code = 0xdda0dd },
346 { .name = "powderblue", .code = 0xb0e0e6 },
347 { .name = "purple", .code = 0x800080 },
348 { .name = "red", .code = 0xff0000 },
349 { .name = "rosybrown", .code = 0xbc8f8f },
350 { .name = "royalblue", .code = 0x4169e1 },
351 { .name = "saddlebrown", .code = 0x8b4513 },
352 { .name = "salmon", .code = 0xfa8072 },
353 { .name = "sandybrown", .code = 0xf4a460 },
354 { .name = "seagreen", .code = 0x2e8b57 },
355 { .name = "seashell", .code = 0xfff5ee },
356 { .name = "sienna", .code = 0xa0522d },
357 { .name = "silver", .code = 0xc0c0c0 },
358 { .name = "skyblue", .code = 0x87ceeb },
359 { .name = "slateblue", .code = 0x6a5acd },
360 { .name = "slategray", .code = 0x708090 },
361 { .name = "slategrey", .code = 0x708090 },
362 { .name = "snow", .code = 0xfffafa },
363 { .name = "springgreen", .code = 0x00ff7f },
364 { .name = "steelblue", .code = 0x4682b4 },
365 { .name = "tan", .code = 0xd2b48c },
366 { .name = "teal", .code = 0x008080 },
367 { .name = "thistle", .code = 0xd8bfd8 },
368 { .name = "tomato", .code = 0xff6347 },
369 { .name = "turquoise", .code = 0x40e0d0 },
370 { .name = "violet", .code = 0xee82ee },
371 { .name = "wheat", .code = 0xf5deb3 },
372 { .name = "white", .code = 0xffffff },
373 { .name = "whitesmoke", .code = 0xf5f5f5 },
374 { .name = "yellow", .code = 0xffff00 },
375 { .name = "yellowgreen", .code = 0x9acd32 },
378 static struct hmap color_table = HMAP_INITIALIZER (color_table);
380 if (hmap_is_empty (&color_table))
381 for (size_t i = 0; i < sizeof colors / sizeof *colors; i++)
382 hmap_insert (&color_table, &colors[i].hmap_node,
383 hash_string (colors[i].name, 0));
385 const struct color *color;
386 HMAP_FOR_EACH_WITH_HASH (color, struct color, hmap_node,
387 hash_string (s, 0), &color_table)
388 if (!strcmp (color->name, s))
394 parse_color__ (const char *s, struct cell_color *color)
397 uint16_t r16, g16, b16;
399 if (sscanf (s, "#%4"SCNx16"%4"SCNx16"%4"SCNx16"%n",
400 &r16, &g16, &b16, &len) == 3
412 if (sscanf (s, "#%2"SCNx8"%2"SCNx8"%2"SCNx8"%n", &r, &g, &b, &len) == 3
423 if (sscanf (s, "%2"SCNx8"%2"SCNx8"%2"SCNx8"%n", &r, &g, &b, &len) == 3
434 if (sscanf (s, "rgb (%"SCNi8" , %"SCNi8" , %"SCNi8") %n",
435 &r, &g, &b, &len) == 3
444 /* rgba(r,g,b,a), ignoring a. */
445 if (sscanf (s, "rgba (%"SCNi8" , %"SCNi8" , %"SCNi8", %*f) %n",
446 &r, &g, &b, &len) == 3
455 int code = lookup_color_name (s);
458 color->r = code >> 16;
459 color->g = code >> 8;
467 /* Parse color information specified by KEY into {RED,GREEN,BLUE}.
468 Currently, the input string must be of the form "#RRRRGGGGBBBB"
469 Future implementations might allow things like "yellow" and
470 "sky-blue-ultra-brown"
473 parse_color (struct output_driver *d, struct string_map *options,
474 const char *key, const char *default_value,
475 struct cell_color *color)
477 char *string = parse_string (opt (d, options, key, default_value));
478 if (!parse_color__ (string, color) && !parse_color__ (default_value, color))
479 *color = (struct cell_color) CELL_COLOR_BLACK;
483 static PangoFontDescription *
484 parse_font (const char *font, int default_size, bool bold, bool italic)
486 if (!c_strcasecmp (font, "Monospaced"))
489 PangoFontDescription *desc = pango_font_description_from_string (font);
493 /* If the font description didn't include an explicit font size, then set it
494 to DEFAULT_SIZE, which is in inch/72000 units. */
495 if (!(pango_font_description_get_set_fields (desc) & PANGO_FONT_MASK_SIZE))
496 pango_font_description_set_size (desc,
497 (default_size / 1000.0) * PANGO_SCALE);
499 pango_font_description_set_weight (desc, (bold
501 : PANGO_WEIGHT_NORMAL));
502 pango_font_description_set_style (desc, (italic
504 : PANGO_STYLE_NORMAL));
509 static PangoFontDescription *
510 parse_font_option (struct output_driver *d, struct string_map *options,
511 const char *key, const char *default_value,
512 int default_size, bool bold, bool italic)
514 char *string = parse_string (opt (d, options, key, default_value));
515 PangoFontDescription *desc = parse_font (string, default_size, bold, italic);
518 msg (MW, _("`%s': bad font specification"), string);
520 /* Fall back to DEFAULT_VALUE, which had better be a valid font
522 desc = parse_font (default_value, default_size, bold, italic);
523 assert (desc != NULL);
531 apply_options (struct xr_driver *xr, struct string_map *o)
533 struct output_driver *d = &xr->driver;
535 /* In inch/72000 units used by parse_paper_size() and parse_dimension(). */
536 int left_margin, right_margin;
537 int top_margin, bottom_margin;
538 int paper_width, paper_length;
540 int min_break[TABLE_N_AXES];
542 /* Scale factor from inch/72000 to inch/(72 * XR_POINT). */
543 const double scale = XR_POINT / 1000.;
547 for (i = 0; i < XR_N_FONTS; i++)
549 struct xr_font *font = &xr->fonts[i];
551 if (font->desc != NULL)
552 pango_font_description_free (font->desc);
555 font_size = parse_int (opt (d, o, "font-size", "10000"), 1000, 1000000);
556 xr->fonts[XR_FONT_FIXED].desc = parse_font_option
557 (d, o, "fixed-font", "monospace", font_size, false, false);
558 xr->fonts[XR_FONT_PROPORTIONAL].desc = parse_font_option (
559 d, o, "prop-font", "sans serif", font_size, false, false);
560 xr->fonts[XR_FONT_EMPHASIS].desc = parse_font_option (
561 d, o, "emph-font", "sans serif", font_size, false, true);
563 parse_color (d, o, "background-color", "#FFFFFFFFFFFF", &xr->bg);
564 parse_color (d, o, "foreground-color", "#000000000000", &xr->fg);
566 xr->transparent = parse_boolean (opt (d, o, "transparent", "false"));
567 xr->systemcolors = parse_boolean (opt (d, o, "systemcolors", "false"));
569 /* Get dimensions. */
570 parse_paper_size (opt (d, o, "paper-size", ""), &paper_width, &paper_length);
571 left_margin = parse_dimension (opt (d, o, "left-margin", ".5in"));
572 right_margin = parse_dimension (opt (d, o, "right-margin", ".5in"));
573 top_margin = parse_dimension (opt (d, o, "top-margin", ".5in"));
574 bottom_margin = parse_dimension (opt (d, o, "bottom-margin", ".5in"));
576 min_break[H] = parse_dimension (opt (d, o, "min-hbreak", NULL)) * scale;
577 min_break[V] = parse_dimension (opt (d, o, "min-vbreak", NULL)) * scale;
579 int object_spacing = (parse_dimension (opt (d, o, "object-spacing", NULL))
582 /* Convert to inch/(XR_POINT * 72). */
583 xr->left_margin = left_margin * scale;
584 xr->right_margin = right_margin * scale;
585 xr->top_margin = top_margin * scale;
586 xr->bottom_margin = bottom_margin * scale;
587 xr->width = (paper_width - left_margin - right_margin) * scale;
588 xr->length = (paper_length - top_margin - bottom_margin) * scale;
589 xr->min_break[H] = min_break[H] >= 0 ? min_break[H] : xr->width / 2;
590 xr->min_break[V] = min_break[V] >= 0 ? min_break[V] : xr->length / 2;
591 xr->object_spacing = object_spacing >= 0 ? object_spacing : XR_POINT * 12;
593 /* There are no headings so headings_height can stay 0. */
596 static struct xr_driver *
597 xr_allocate (const char *name, int device_type, struct string_map *o,
600 struct xr_driver *xr = xzalloc (sizeof *xr);
601 struct output_driver *d = &xr->driver;
603 output_driver_init (d, &cairo_driver_class, name, device_type);
605 string_map_init (&xr->heading_vars);
607 /* This is a nasty kluge for an issue that does not make sense. On any
608 surface other than a screen (e.g. for output to PDF or PS or SVG), the
609 fonts are way too big by default. A "9-point" font seems to appear about
610 16 points tall. We use a scale factor for these surfaces to help, but the
611 underlying issue is a mystery. */
612 xr->font_scale = font_scale;
614 apply_options (xr, o);
620 pango_to_xr (int pango)
622 return (XR_POINT != PANGO_SCALE
623 ? ceil (pango * (1. * XR_POINT / PANGO_SCALE))
630 return (XR_POINT != PANGO_SCALE
631 ? ceil (xr * (1. / XR_POINT * PANGO_SCALE))
636 xr_measure_fonts (cairo_t *cairo, const struct xr_font fonts[XR_N_FONTS],
637 int *char_width, int *char_height)
641 for (int i = 0; i < XR_N_FONTS; i++)
643 PangoLayout *layout = pango_cairo_create_layout (cairo);
644 pango_layout_set_font_description (layout, fonts[i].desc);
646 pango_layout_set_text (layout, "0", 1);
649 pango_layout_get_size (layout, &cw, &ch);
650 *char_width = MAX (*char_width, pango_to_xr (cw));
651 *char_height = MAX (*char_height, pango_to_xr (ch));
653 g_object_unref (G_OBJECT (layout));
658 get_layout_height (PangoLayout *layout)
661 pango_layout_get_size (layout, &w, &h);
666 xr_render_page_heading (cairo_t *cairo, const PangoFontDescription *font,
667 const struct page_heading *ph, int page_number,
668 int width, bool draw, int base_y)
670 PangoLayout *layout = pango_cairo_create_layout (cairo);
671 pango_layout_set_font_description (layout, font);
674 for (size_t i = 0; i < ph->n; i++)
676 const struct page_paragraph *pp = &ph->paragraphs[i];
678 char *markup = output_driver_substitute_heading_vars (pp->markup,
680 pango_layout_set_markup (layout, markup, -1);
683 pango_layout_set_alignment (
685 (pp->halign == TABLE_HALIGN_LEFT ? PANGO_ALIGN_LEFT
686 : pp->halign == TABLE_HALIGN_CENTER ? PANGO_ALIGN_CENTER
687 : pp->halign == TABLE_HALIGN_MIXED ? PANGO_ALIGN_LEFT
688 : PANGO_ALIGN_RIGHT));
689 pango_layout_set_width (layout, xr_to_pango (width));
693 cairo_translate (cairo, 0, xr_to_pt (y + base_y));
694 pango_cairo_show_layout (cairo, layout);
695 cairo_restore (cairo);
698 y += pango_to_xr (get_layout_height (layout));
701 g_object_unref (G_OBJECT (layout));
707 xr_measure_headings (cairo_surface_t *surface,
708 const PangoFontDescription *font,
709 const struct page_heading headings[2],
710 int width, int object_spacing, int height[2])
712 cairo_t *cairo = cairo_create (surface);
714 for (int i = 0; i < 2; i++)
716 int h = xr_render_page_heading (cairo, font, &headings[i], -1,
719 /* If the top heading is nonempty, add some space below it. */
727 cairo_destroy (cairo);
732 xr_check_fonts (cairo_surface_t *surface,
733 const struct xr_font fonts[XR_N_FONTS],
734 int usable_width, int usable_length)
736 cairo_t *cairo = cairo_create (surface);
737 int char_width, char_height;
738 xr_measure_fonts (cairo, fonts, &char_width, &char_height);
739 cairo_destroy (cairo);
742 enum { MIN_WIDTH = 3, MIN_LENGTH = 3 };
743 if (usable_width / char_width < MIN_WIDTH)
745 msg (ME, _("The defined page is not wide enough to hold at least %d "
746 "characters in the default font. In fact, there's only "
747 "room for %d characters."),
748 MIN_WIDTH, usable_width / char_width);
751 if (usable_length / char_height < MIN_LENGTH)
753 msg (ME, _("The defined page is not long enough to hold at least %d "
754 "lines in the default font. In fact, there's only "
755 "room for %d lines."),
756 MIN_LENGTH, usable_length / char_height);
763 xr_set_cairo (struct xr_driver *xr, cairo_t *cairo)
767 cairo_set_line_width (xr->cairo, xr_to_pt (XR_LINE_WIDTH));
769 xr_measure_fonts (xr->cairo, xr->fonts, &xr->char_width, &xr->char_height);
771 for (int i = 0; i < XR_N_FONTS; i++)
773 struct xr_font *font = &xr->fonts[i];
774 font->layout = pango_cairo_create_layout (cairo);
775 pango_layout_set_font_description (font->layout, font->desc);
778 if (xr->params == NULL)
780 xr->params = xmalloc (sizeof *xr->params);
781 xr->params->draw_line = xr_draw_line;
782 xr->params->measure_cell_width = xr_measure_cell_width;
783 xr->params->measure_cell_height = xr_measure_cell_height;
784 xr->params->adjust_break = xr_adjust_break;
785 xr->params->draw_cell = xr_draw_cell;
786 xr->params->aux = xr;
787 xr->params->size[H] = xr->width;
788 xr->params->size[V] = xr->length;
789 xr->params->font_size[H] = xr->char_width;
790 xr->params->font_size[V] = xr->char_height;
792 int lw = XR_LINE_WIDTH;
793 int ls = XR_LINE_SPACE;
794 for (int i = 0; i < TABLE_N_AXES; i++)
796 xr->params->line_widths[i][RENDER_LINE_NONE] = 0;
797 xr->params->line_widths[i][RENDER_LINE_SINGLE] = lw;
798 xr->params->line_widths[i][RENDER_LINE_DASHED] = lw;
799 xr->params->line_widths[i][RENDER_LINE_THICK] = lw * 2;
800 xr->params->line_widths[i][RENDER_LINE_THIN] = lw / 2;
801 xr->params->line_widths[i][RENDER_LINE_DOUBLE] = 2 * lw + ls;
804 for (int i = 0; i < TABLE_N_AXES; i++)
805 xr->params->min_break[i] = xr->min_break[i];
806 xr->params->supports_margins = true;
807 xr->params->rtl = render_direction_rtl ();
810 if (!xr->systemcolors)
811 cairo_set_source_rgb (xr->cairo,
812 xr->fg.r / 255.0, xr->fg.g / 255.0, xr->fg.b / 255.0);
815 static struct output_driver *
816 xr_create (struct file_handle *fh, enum settings_output_devices device_type,
817 struct string_map *o, enum xr_output_type file_type)
819 const char *file_name = fh_get_file_name (fh);
820 struct xr_driver *xr = xr_allocate (file_name, device_type, o, 72.0 / 128.0);
821 double width_pt = xr_to_pt (xr->width + xr->left_margin + xr->right_margin);
822 double length_pt = xr_to_pt (xr->length + xr->top_margin + xr->bottom_margin);
823 if (file_type == XR_PDF)
824 xr->surface = cairo_pdf_surface_create (file_name, width_pt, length_pt);
825 else if (file_type == XR_PS)
826 xr->surface = cairo_ps_surface_create (file_name, width_pt, length_pt);
827 else if (file_type == XR_SVG)
828 xr->surface = cairo_svg_surface_create (file_name, width_pt, length_pt);
832 cairo_status_t status = cairo_surface_status (xr->surface);
833 if (status != CAIRO_STATUS_SUCCESS)
835 msg (ME, _("error opening output file `%s': %s"),
836 file_name, cairo_status_to_string (status));
840 if (!xr_check_fonts (xr->surface, xr->fonts, xr->width, xr->length))
848 output_driver_destroy (&xr->driver);
852 static struct output_driver *
853 xr_pdf_create (struct file_handle *fh, enum settings_output_devices device_type,
854 struct string_map *o)
856 return xr_create (fh, device_type, o, XR_PDF);
859 static struct output_driver *
860 xr_ps_create (struct file_handle *fh, enum settings_output_devices device_type,
861 struct string_map *o)
863 return xr_create (fh, device_type, o, XR_PS);
866 static struct output_driver *
867 xr_svg_create (struct file_handle *fh, enum settings_output_devices device_type,
868 struct string_map *o)
870 return xr_create (fh, device_type, o, XR_SVG);
874 xr_destroy (struct output_driver *driver)
876 struct xr_driver *xr = xr_driver_cast (driver);
879 xr_driver_destroy_fsm (xr);
881 if (xr->cairo != NULL)
883 cairo_surface_finish (xr->surface);
884 cairo_status_t status = cairo_status (xr->cairo);
885 if (status != CAIRO_STATUS_SUCCESS)
886 fprintf (stderr, _("error drawing output for %s driver: %s"),
887 output_driver_get_name (driver),
888 cairo_status_to_string (status));
889 cairo_surface_destroy (xr->surface);
891 cairo_destroy (xr->cairo);
894 for (i = 0; i < XR_N_FONTS; i++)
896 struct xr_font *font = &xr->fonts[i];
898 if (font->desc != NULL)
899 pango_font_description_free (font->desc);
900 if (font->layout != NULL)
901 g_object_unref (font->layout);
909 xr_flush (struct output_driver *driver)
911 struct xr_driver *xr = xr_driver_cast (driver);
913 cairo_surface_flush (cairo_get_target (xr->cairo));
917 xr_update_page_setup (struct output_driver *driver,
918 const struct page_setup *ps)
920 struct xr_driver *xr = xr_driver_cast (driver);
922 xr->initial_page_number = ps->initial_page_number;
923 xr->object_spacing = ps->object_spacing * 72 * XR_POINT;
928 int usable[TABLE_N_AXES];
929 for (int i = 0; i < 2; i++)
930 usable[i] = (ps->paper[i]
931 - (ps->margins[i][0] + ps->margins[i][1])) * 72 * XR_POINT;
933 int headings_height[2];
934 usable[V] -= xr_measure_headings (
935 xr->surface, xr->fonts[XR_FONT_PROPORTIONAL].desc, ps->headings,
936 usable[H], xr->object_spacing, headings_height);
938 enum table_axis h = ps->orientation == PAGE_LANDSCAPE;
939 enum table_axis v = !h;
940 if (!xr_check_fonts (xr->surface, xr->fonts, usable[h], usable[v]))
943 for (int i = 0; i < 2; i++)
945 page_heading_uninit (&xr->headings[i]);
946 page_heading_copy (&xr->headings[i], &ps->headings[i]);
947 xr->headings_height[i] = headings_height[i];
949 xr->width = usable[h];
950 xr->length = usable[v];
951 xr->left_margin = ps->margins[h][0] * 72 * XR_POINT;
952 xr->right_margin = ps->margins[h][1] * 72 * XR_POINT;
953 xr->top_margin = ps->margins[v][0] * 72 * XR_POINT;
954 xr->bottom_margin = ps->margins[v][1] * 72 * XR_POINT;
955 cairo_pdf_surface_set_size (xr->surface,
956 ps->paper[h] * 72.0, ps->paper[v] * 72.0);
960 xr_submit (struct output_driver *driver, const struct output_item *output_item)
962 struct xr_driver *xr = xr_driver_cast (driver);
964 if (is_page_setup_item (output_item))
966 xr_update_page_setup (driver,
967 to_page_setup_item (output_item)->page_setup);
973 xr->page_number = xr->initial_page_number - 1;
974 xr_set_cairo (xr, cairo_create (xr->surface));
975 cairo_save (xr->cairo);
976 xr_driver_next_page (xr, xr->cairo);
979 xr_driver_output_item (xr, output_item);
980 while (xr_driver_need_new_page (xr))
982 cairo_restore (xr->cairo);
983 cairo_show_page (xr->cairo);
984 cairo_save (xr->cairo);
985 xr_driver_next_page (xr, xr->cairo);
989 /* Functions for rendering a series of output items to a series of Cairo
990 contexts, with pagination.
992 Used by PSPPIRE for printing, and by the basic Cairo output driver above as
993 its underlying implementation.
995 See the big comment in cairo.h for intended usage. */
997 /* Gives new page CAIRO to XR for output. */
999 xr_driver_next_page (struct xr_driver *xr, cairo_t *cairo)
1001 if (!xr->transparent)
1004 cairo_set_source_rgb (cairo,
1005 xr->bg.r / 255.0, xr->bg.g / 255.0, xr->bg.b / 255.0);
1006 cairo_rectangle (cairo, 0, 0, xr->width, xr->length);
1008 cairo_restore (cairo);
1010 cairo_translate (cairo,
1011 xr_to_pt (xr->left_margin),
1012 xr_to_pt (xr->top_margin + xr->headings_height[0]));
1018 xr_render_page_heading (xr->cairo, xr->fonts[XR_FONT_PROPORTIONAL].desc,
1019 &xr->headings[0], xr->page_number, xr->width, true,
1020 -xr->headings_height[0]);
1021 xr_render_page_heading (xr->cairo, xr->fonts[XR_FONT_PROPORTIONAL].desc,
1022 &xr->headings[1], xr->page_number, xr->width, true,
1025 xr_driver_run_fsm (xr);
1028 /* Start rendering OUTPUT_ITEM to XR. Only valid if XR is not in the middle of
1029 rendering a previous output item, that is, only if xr_driver_need_new_page()
1032 xr_driver_output_item (struct xr_driver *xr,
1033 const struct output_item *output_item)
1035 assert (xr->fsm == NULL);
1036 xr->fsm = xr_render_output_item (xr, output_item);
1037 xr_driver_run_fsm (xr);
1040 /* Returns true if XR is in the middle of rendering an output item and needs a
1041 new page to be appended using xr_driver_next_page() to make progress,
1044 xr_driver_need_new_page (const struct xr_driver *xr)
1046 return xr->fsm != NULL;
1049 /* Returns true if the current page doesn't have any content yet. */
1051 xr_driver_is_page_blank (const struct xr_driver *xr)
1057 xr_driver_destroy_fsm (struct xr_driver *xr)
1059 if (xr->fsm != NULL)
1061 xr->fsm->destroy (xr->fsm);
1067 xr_driver_run_fsm (struct xr_driver *xr)
1069 if (xr->fsm != NULL && !xr->fsm->render (xr->fsm, xr))
1070 xr_driver_destroy_fsm (xr);
1074 xr_layout_cell (struct xr_driver *, const struct table_cell *,
1075 int bb[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
1076 int *width, int *height, int *brk);
1079 set_source_rgba (cairo_t *cairo, const struct cell_color *color)
1081 cairo_set_source_rgba (cairo,
1082 color->r / 255., color->g / 255., color->b / 255.,
1083 color->alpha / 255.);
1087 dump_line (struct xr_driver *xr, int x0, int y0, int x1, int y1, int style,
1088 const struct cell_color *color)
1090 cairo_new_path (xr->cairo);
1091 if (!xr->systemcolors)
1092 set_source_rgba (xr->cairo, color);
1093 cairo_set_line_width (
1095 xr_to_pt (style == RENDER_LINE_THICK ? XR_LINE_WIDTH * 2
1096 : style == RENDER_LINE_THIN ? XR_LINE_WIDTH / 2
1098 cairo_move_to (xr->cairo, xr_to_pt (x0 + xr->x), xr_to_pt (y0 + xr->y));
1099 cairo_line_to (xr->cairo, xr_to_pt (x1 + xr->x), xr_to_pt (y1 + xr->y));
1100 cairo_stroke (xr->cairo);
1104 dump_rectangle (struct xr_driver *xr, int x0, int y0, int x1, int y1)
1106 cairo_new_path (xr->cairo);
1107 cairo_set_line_width (xr->cairo, xr_to_pt (XR_LINE_WIDTH));
1108 cairo_move_to (xr->cairo, xr_to_pt (x0 + xr->x), xr_to_pt (y0 + xr->y));
1109 cairo_line_to (xr->cairo, xr_to_pt (x1 + xr->x), xr_to_pt (y0 + xr->y));
1110 cairo_line_to (xr->cairo, xr_to_pt (x1 + xr->x), xr_to_pt (y1 + xr->y));
1111 cairo_line_to (xr->cairo, xr_to_pt (x0 + xr->x), xr_to_pt (y1 + xr->y));
1112 cairo_close_path (xr->cairo);
1113 cairo_stroke (xr->cairo);
1117 fill_rectangle (struct xr_driver *xr, int x0, int y0, int x1, int y1)
1119 cairo_new_path (xr->cairo);
1120 cairo_set_line_width (xr->cairo, xr_to_pt (XR_LINE_WIDTH));
1121 cairo_rectangle (xr->cairo,
1122 xr_to_pt (x0 + xr->x), xr_to_pt (y0 + xr->y),
1123 xr_to_pt (x1 - x0), xr_to_pt (y1 - y0));
1124 cairo_fill (xr->cairo);
1127 /* Draws a horizontal line X0...X2 at Y if LEFT says so,
1128 shortening it to X0...X1 if SHORTEN is true.
1129 Draws a horizontal line X1...X3 at Y if RIGHT says so,
1130 shortening it to X2...X3 if SHORTEN is true. */
1132 horz_line (struct xr_driver *xr, int x0, int x1, int x2, int x3, int y,
1133 enum render_line_style left, enum render_line_style right,
1134 const struct cell_color *left_color,
1135 const struct cell_color *right_color,
1138 if (left != RENDER_LINE_NONE && right != RENDER_LINE_NONE && !shorten
1139 && cell_color_equal (left_color, right_color))
1140 dump_line (xr, x0, y, x3, y, left, left_color);
1143 if (left != RENDER_LINE_NONE)
1144 dump_line (xr, x0, y, shorten ? x1 : x2, y, left, left_color);
1145 if (right != RENDER_LINE_NONE)
1146 dump_line (xr, shorten ? x2 : x1, y, x3, y, right, right_color);
1150 /* Draws a vertical line Y0...Y2 at X if TOP says so,
1151 shortening it to Y0...Y1 if SHORTEN is true.
1152 Draws a vertical line Y1...Y3 at X if BOTTOM says so,
1153 shortening it to Y2...Y3 if SHORTEN is true. */
1155 vert_line (struct xr_driver *xr, int y0, int y1, int y2, int y3, int x,
1156 enum render_line_style top, enum render_line_style bottom,
1157 const struct cell_color *top_color,
1158 const struct cell_color *bottom_color,
1161 if (top != RENDER_LINE_NONE && bottom != RENDER_LINE_NONE && !shorten
1162 && cell_color_equal (top_color, bottom_color))
1163 dump_line (xr, x, y0, x, y3, top, top_color);
1166 if (top != RENDER_LINE_NONE)
1167 dump_line (xr, x, y0, x, shorten ? y1 : y2, top, top_color);
1168 if (bottom != RENDER_LINE_NONE)
1169 dump_line (xr, x, shorten ? y2 : y1, x, y3, bottom, bottom_color);
1174 xr_draw_line (void *xr_, int bb[TABLE_N_AXES][2],
1175 enum render_line_style styles[TABLE_N_AXES][2],
1176 struct cell_color colors[TABLE_N_AXES][2])
1178 const int x0 = bb[H][0];
1179 const int y0 = bb[V][0];
1180 const int x3 = bb[H][1];
1181 const int y3 = bb[V][1];
1182 const int top = styles[H][0];
1183 const int bottom = styles[H][1];
1185 int start_side = render_direction_rtl();
1186 int end_side = !start_side;
1187 const int start_of_line = styles[V][start_side];
1188 const int end_of_line = styles[V][end_side];
1189 const struct cell_color *top_color = &colors[H][0];
1190 const struct cell_color *bottom_color = &colors[H][1];
1191 const struct cell_color *start_color = &colors[V][start_side];
1192 const struct cell_color *end_color = &colors[V][end_side];
1194 /* The algorithm here is somewhat subtle, to allow it to handle
1195 all the kinds of intersections that we need.
1197 Three additional ordinates are assigned along the x axis. The
1198 first is xc, midway between x0 and x3. The others are x1 and
1199 x2; for a single vertical line these are equal to xc, and for
1200 a double vertical line they are the ordinates of the left and
1201 right half of the double line.
1203 yc, y1, and y2 are assigned similarly along the y axis.
1205 The following diagram shows the coordinate system and output
1206 for double top and bottom lines, single left line, and no
1210 y0 ________________________
1216 y1 = y2 = yc |######### # |
1221 y3 |________#_____#_______|
1223 struct xr_driver *xr = xr_;
1225 /* Offset from center of each line in a pair of double lines. */
1226 int double_line_ofs = (XR_LINE_SPACE + XR_LINE_WIDTH) / 2;
1228 /* Are the lines along each axis single or double?
1229 (It doesn't make sense to have different kinds of line on the
1230 same axis, so we don't try to gracefully handle that case.) */
1231 bool double_vert = top == RENDER_LINE_DOUBLE || bottom == RENDER_LINE_DOUBLE;
1232 bool double_horz = start_of_line == RENDER_LINE_DOUBLE || end_of_line == RENDER_LINE_DOUBLE;
1234 /* When horizontal lines are doubled,
1235 the left-side line along y1 normally runs from x0 to x2,
1236 and the right-side line along y1 from x3 to x1.
1237 If the top-side line is also doubled, we shorten the y1 lines,
1238 so that the left-side line runs only to x1,
1239 and the right-side line only to x2.
1240 Otherwise, the horizontal line at y = y1 below would cut off
1241 the intersection, which looks ugly:
1243 y0 ________________________
1248 y1 |######### ########|
1251 y2 |######################|
1254 y3 |______________________|
1255 It is more of a judgment call when the horizontal line is
1256 single. We actually choose to cut off the line anyhow, as
1257 shown in the first diagram above.
1259 bool shorten_y1_lines = top == RENDER_LINE_DOUBLE;
1260 bool shorten_y2_lines = bottom == RENDER_LINE_DOUBLE;
1261 bool shorten_yc_line = shorten_y1_lines && shorten_y2_lines;
1262 int horz_line_ofs = double_vert ? double_line_ofs : 0;
1263 int xc = (x0 + x3) / 2;
1264 int x1 = xc - horz_line_ofs;
1265 int x2 = xc + horz_line_ofs;
1267 bool shorten_x1_lines = start_of_line == RENDER_LINE_DOUBLE;
1268 bool shorten_x2_lines = end_of_line == RENDER_LINE_DOUBLE;
1269 bool shorten_xc_line = shorten_x1_lines && shorten_x2_lines;
1270 int vert_line_ofs = double_horz ? double_line_ofs : 0;
1271 int yc = (y0 + y3) / 2;
1272 int y1 = yc - vert_line_ofs;
1273 int y2 = yc + vert_line_ofs;
1276 horz_line (xr, x0, x1, x2, x3, yc, start_of_line, end_of_line,
1277 start_color, end_color, shorten_yc_line);
1280 horz_line (xr, x0, x1, x2, x3, y1, start_of_line, end_of_line,
1281 start_color, end_color, shorten_y1_lines);
1282 horz_line (xr, x0, x1, x2, x3, y2, start_of_line, end_of_line,
1283 start_color, end_color, shorten_y2_lines);
1287 vert_line (xr, y0, y1, y2, y3, xc, top, bottom, top_color, bottom_color,
1291 vert_line (xr, y0, y1, y2, y3, x1, top, bottom, top_color, bottom_color,
1293 vert_line (xr, y0, y1, y2, y3, x2, top, bottom, top_color, bottom_color,
1299 xr_measure_cell_width (void *xr_, const struct table_cell *cell,
1300 int *min_width, int *max_width)
1302 struct xr_driver *xr = xr_;
1303 int bb[TABLE_N_AXES][2];
1304 int clip[TABLE_N_AXES][2];
1311 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
1312 xr_layout_cell (xr, cell, bb, clip, max_width, &h, NULL);
1315 xr_layout_cell (xr, cell, bb, clip, min_width, &h, NULL);
1318 *min_width += px_to_xr (cell->style->cell_style.margin[H][0]
1319 + cell->style->cell_style.margin[H][1]);
1321 *max_width += px_to_xr (cell->style->cell_style.margin[H][0]
1322 + cell->style->cell_style.margin[H][1]);
1326 xr_measure_cell_height (void *xr_, const struct table_cell *cell, int width)
1328 struct xr_driver *xr = xr_;
1329 int bb[TABLE_N_AXES][2];
1330 int clip[TABLE_N_AXES][2];
1334 bb[H][1] = width - px_to_xr (cell->style->cell_style.margin[H][0]
1335 + cell->style->cell_style.margin[H][1]);
1338 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
1339 xr_layout_cell (xr, cell, bb, clip, &w, &h, NULL);
1340 h += px_to_xr (cell->style->cell_style.margin[V][0]
1341 + cell->style->cell_style.margin[V][1]);
1345 static void xr_clip (struct xr_driver *, int clip[TABLE_N_AXES][2]);
1348 xr_draw_cell (void *xr_, const struct table_cell *cell, int color_idx,
1349 int bb[TABLE_N_AXES][2], int valign_offset,
1350 int spill[TABLE_N_AXES][2],
1351 int clip[TABLE_N_AXES][2])
1353 struct xr_driver *xr = xr_;
1356 if (!xr->transparent)
1358 cairo_save (xr->cairo);
1359 int bg_clip[TABLE_N_AXES][2];
1360 for (int axis = 0; axis < TABLE_N_AXES; axis++)
1362 bg_clip[axis][0] = clip[axis][0];
1363 if (bb[axis][0] == clip[axis][0])
1364 bg_clip[axis][0] -= spill[axis][0];
1366 bg_clip[axis][1] = clip[axis][1];
1367 if (bb[axis][1] == clip[axis][1])
1368 bg_clip[axis][1] += spill[axis][1];
1370 xr_clip (xr, bg_clip);
1371 set_source_rgba (xr->cairo, &cell->style->font_style.bg[color_idx]);
1373 bb[H][0] - spill[H][0],
1374 bb[V][0] - spill[V][0],
1375 bb[H][1] + spill[H][1],
1376 bb[V][1] + spill[V][1]);
1377 cairo_restore (xr->cairo);
1379 cairo_save (xr->cairo);
1380 if (!xr->systemcolors)
1381 set_source_rgba (xr->cairo, &cell->style->font_style.fg[color_idx]);
1383 bb[V][0] += valign_offset;
1385 for (int axis = 0; axis < TABLE_N_AXES; axis++)
1387 bb[axis][0] += px_to_xr (cell->style->cell_style.margin[axis][0]);
1388 bb[axis][1] -= px_to_xr (cell->style->cell_style.margin[axis][1]);
1390 if (bb[H][0] < bb[H][1] && bb[V][0] < bb[V][1])
1391 xr_layout_cell (xr, cell, bb, clip, &w, &h, &brk);
1392 cairo_restore (xr->cairo);
1396 xr_adjust_break (void *xr_, const struct table_cell *cell,
1397 int width, int height)
1399 struct xr_driver *xr = xr_;
1400 int bb[TABLE_N_AXES][2];
1401 int clip[TABLE_N_AXES][2];
1404 if (xr_measure_cell_height (xr_, cell, width) < height)
1408 bb[H][1] = width - px_to_xr (cell->style->cell_style.margin[H][0]
1409 + cell->style->cell_style.margin[H][1]);
1413 bb[V][1] = height - px_to_xr (cell->style->cell_style.margin[V][0]
1414 + cell->style->cell_style.margin[V][1]);
1415 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
1416 xr_layout_cell (xr, cell, bb, clip, &w, &h, &brk);
1421 xr_clip (struct xr_driver *xr, int clip[TABLE_N_AXES][2])
1423 if (clip[H][1] != INT_MAX || clip[V][1] != INT_MAX)
1425 double x0 = xr_to_pt (clip[H][0] + xr->x);
1426 double y0 = xr_to_pt (clip[V][0] + xr->y);
1427 double x1 = xr_to_pt (clip[H][1] + xr->x);
1428 double y1 = xr_to_pt (clip[V][1] + xr->y);
1430 cairo_rectangle (xr->cairo, x0, y0, x1 - x0, y1 - y0);
1431 cairo_clip (xr->cairo);
1436 add_attr (PangoAttrList *list, PangoAttribute *attr,
1437 guint start_index, guint end_index)
1439 attr->start_index = start_index;
1440 attr->end_index = end_index;
1441 pango_attr_list_insert (list, attr);
1445 markup_escape (struct string *out, unsigned int options,
1446 const char *in, size_t len)
1448 if (!(options & TAB_MARKUP))
1450 ds_put_substring (out, ss_buffer (in, len == -1 ? strlen (in) : len));
1462 ds_put_cstr (out, "&");
1465 ds_put_cstr (out, "<");
1468 ds_put_cstr (out, ">");
1471 ds_put_byte (out, c);
1478 get_layout_dimension (PangoLayout *layout, enum table_axis axis)
1480 int size[TABLE_N_AXES];
1481 pango_layout_get_size (layout, &size[H], &size[V]);
1486 xr_layout_cell_text (struct xr_driver *xr, const struct table_cell *cell,
1487 int bb[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
1488 int *widthp, int *brk)
1490 const struct font_style *font_style = &cell->style->font_style;
1491 const struct cell_style *cell_style = &cell->style->cell_style;
1492 unsigned int options = cell->options;
1494 enum table_axis X = options & TAB_ROTATE ? V : H;
1495 enum table_axis Y = !X;
1496 int R = options & TAB_ROTATE ? 0 : 1;
1498 struct xr_font *font = (options & TAB_FIX ? &xr->fonts[XR_FONT_FIXED]
1499 : &xr->fonts[XR_FONT_PROPORTIONAL]);
1500 struct xr_font local_font;
1501 if (font_style->typeface)
1503 PangoFontDescription *desc = parse_font (
1504 font_style->typeface,
1505 font_style->size ? font_style->size * 1000 * xr->font_scale : 10000,
1506 font_style->bold, font_style->italic);
1509 PangoLayout *layout = pango_cairo_create_layout (xr->cairo);
1510 pango_layout_set_font_description (layout, desc);
1512 local_font.desc = desc;
1513 local_font.layout = layout;
1518 const char *text = cell->text;
1519 enum table_halign halign = table_halign_interpret (
1520 cell_style->halign, cell->options & TAB_NUMERIC);
1521 if (cell_style->halign == TABLE_HALIGN_DECIMAL && !(options & TAB_ROTATE))
1523 int margin_adjustment = -px_to_xr (cell_style->decimal_offset);
1525 const char *decimal = strrchr (text, cell_style->decimal_char);
1528 pango_layout_set_text (font->layout, decimal, strlen (decimal));
1529 pango_layout_set_width (font->layout, -1);
1530 margin_adjustment += get_layout_dimension (font->layout, H);
1533 if (margin_adjustment < 0)
1534 bb[H][1] += margin_adjustment;
1537 struct string tmp = DS_EMPTY_INITIALIZER;
1538 PangoAttrList *attrs = NULL;
1540 /* Deal with an oddity of the Unicode line-breaking algorithm (or perhaps in
1541 Pango's implementation of it): it will break after a period or a comma
1542 that precedes a digit, e.g. in ".000" it will break after the period.
1543 This code looks for such a situation and inserts a U+2060 WORD JOINER
1544 to prevent the break.
1546 This isn't necessary when the decimal point is between two digits
1547 (e.g. "0.000" won't be broken) or when the display width is not limited so
1548 that word wrapping won't happen.
1550 It isn't necessary to look for more than one period or comma, as would
1551 happen with grouping like 1,234,567.89 or 1.234.567,89 because if groups
1552 are present then there will always be a digit on both sides of every
1553 period and comma. */
1554 if (options & TAB_MARKUP)
1556 PangoAttrList *new_attrs;
1558 if (pango_parse_markup (text, -1, 0, &new_attrs, &new_text, NULL, NULL))
1561 tmp.ss = ss_cstr (new_text);
1562 tmp.capacity = tmp.ss.length;
1566 /* XXX should we report the error? */
1567 ds_put_cstr (&tmp, text);
1570 else if (options & TAB_ROTATE || bb[H][1] != INT_MAX)
1572 const char *decimal = text + strcspn (text, ".,");
1574 && c_isdigit (decimal[1])
1575 && (decimal == text || !c_isdigit (decimal[-1])))
1577 ds_extend (&tmp, strlen (text) + 16);
1578 markup_escape (&tmp, options, text, decimal - text + 1);
1579 ds_put_unichar (&tmp, 0x2060 /* U+2060 WORD JOINER */);
1580 markup_escape (&tmp, options, decimal + 1, -1);
1584 if (font_style->underline)
1587 attrs = pango_attr_list_new ();
1588 pango_attr_list_insert (attrs, pango_attr_underline_new (
1589 PANGO_UNDERLINE_SINGLE));
1592 if (cell->n_footnotes || cell->n_subscripts || cell->superscript)
1594 /* If we haven't already put TEXT into tmp, do it now. */
1595 if (ds_is_empty (&tmp))
1597 ds_extend (&tmp, strlen (text) + 16);
1598 markup_escape (&tmp, options, text, -1);
1601 size_t subscript_ofs = ds_length (&tmp);
1602 for (size_t i = 0; i < cell->n_subscripts; i++)
1605 ds_put_byte (&tmp, ',');
1606 ds_put_cstr (&tmp, cell->subscripts[i]);
1609 size_t superscript_ofs = ds_length (&tmp);
1610 if (cell->superscript)
1611 ds_put_cstr (&tmp, cell->superscript);
1613 size_t footnote_ofs = ds_length (&tmp);
1614 for (size_t i = 0; i < cell->n_footnotes; i++)
1617 ds_put_byte (&tmp, ',');
1618 ds_put_cstr (&tmp, cell->footnotes[i]->marker);
1621 /* Allow footnote markers to occupy the right margin. That way, numbers
1622 in the column are still aligned. */
1623 if (cell->n_footnotes && halign == TABLE_HALIGN_RIGHT)
1625 /* Measure the width of the footnote marker, so we know how much we
1626 need to make room for. */
1627 pango_layout_set_text (font->layout, ds_cstr (&tmp) + footnote_ofs,
1628 ds_length (&tmp) - footnote_ofs);
1630 PangoAttrList *fn_attrs = pango_attr_list_new ();
1631 pango_attr_list_insert (
1632 fn_attrs, pango_attr_scale_new (PANGO_SCALE_SMALL));
1633 pango_attr_list_insert (fn_attrs, pango_attr_rise_new (3000));
1634 pango_layout_set_attributes (font->layout, fn_attrs);
1635 pango_attr_list_unref (fn_attrs);
1636 int footnote_width = get_layout_dimension (font->layout, X);
1638 /* Bound the adjustment by the width of the right margin. */
1639 int right_margin = px_to_xr (cell_style->margin[X][R]);
1640 int footnote_adjustment = MIN (footnote_width, right_margin);
1642 /* Adjust the bounding box. */
1643 if (options & TAB_ROTATE)
1644 footnote_adjustment = -footnote_adjustment;
1645 bb[X][R] += footnote_adjustment;
1648 pango_layout_set_attributes (font->layout, NULL);
1651 /* Set attributes. */
1653 attrs = pango_attr_list_new ();
1654 add_attr (attrs, pango_attr_font_desc_new (font->desc), subscript_ofs,
1655 PANGO_ATTR_INDEX_TO_TEXT_END);
1656 add_attr (attrs, pango_attr_scale_new (PANGO_SCALE_SMALL),
1657 subscript_ofs, PANGO_ATTR_INDEX_TO_TEXT_END);
1658 if (cell->n_subscripts)
1659 add_attr (attrs, pango_attr_rise_new (-3000), subscript_ofs,
1660 superscript_ofs - subscript_ofs);
1661 if (cell->superscript || cell->n_footnotes)
1662 add_attr (attrs, pango_attr_rise_new (3000), superscript_ofs,
1663 PANGO_ATTR_INDEX_TO_TEXT_END);
1666 /* Set the attributes, if any. */
1669 pango_layout_set_attributes (font->layout, attrs);
1670 pango_attr_list_unref (attrs);
1674 if (ds_is_empty (&tmp))
1675 pango_layout_set_text (font->layout, text, -1);
1677 pango_layout_set_text (font->layout, ds_cstr (&tmp), ds_length (&tmp));
1680 pango_layout_set_alignment (font->layout,
1681 (halign == TABLE_HALIGN_RIGHT ? PANGO_ALIGN_RIGHT
1682 : halign == TABLE_HALIGN_LEFT ? PANGO_ALIGN_LEFT
1683 : PANGO_ALIGN_CENTER));
1684 pango_layout_set_width (
1686 bb[X][1] == INT_MAX ? -1 : xr_to_pango (bb[X][1] - bb[X][0]));
1687 pango_layout_set_wrap (font->layout, PANGO_WRAP_WORD);
1689 if (clip[H][0] != clip[H][1])
1691 cairo_save (xr->cairo);
1692 if (!(options & TAB_ROTATE))
1694 if (options & TAB_ROTATE)
1696 cairo_translate (xr->cairo,
1697 xr_to_pt (bb[H][0] + xr->x),
1698 xr_to_pt (bb[V][1] + xr->y));
1699 cairo_rotate (xr->cairo, -M_PI_2);
1702 cairo_translate (xr->cairo,
1703 xr_to_pt (bb[H][0] + xr->x),
1704 xr_to_pt (bb[V][0] + xr->y));
1705 pango_cairo_show_layout (xr->cairo, font->layout);
1707 /* If enabled, this draws a blue rectangle around the extents of each
1708 line of text, which can be rather useful for debugging layout
1712 PangoLayoutIter *iter;
1713 iter = pango_layout_get_iter (font->layout);
1716 PangoRectangle extents;
1718 pango_layout_iter_get_line_extents (iter, &extents, NULL);
1719 cairo_save (xr->cairo);
1720 cairo_set_source_rgb (xr->cairo, 1, 0, 0);
1722 pango_to_xr (extents.x) - xr->x,
1723 pango_to_xr (extents.y) - xr->y,
1724 pango_to_xr (extents.x + extents.width) - xr->x,
1725 pango_to_xr (extents.y + extents.height) - xr->y);
1726 cairo_restore (xr->cairo);
1728 while (pango_layout_iter_next_line (iter));
1729 pango_layout_iter_free (iter);
1732 cairo_restore (xr->cairo);
1735 int size[TABLE_N_AXES];
1736 pango_layout_get_size (font->layout, &size[H], &size[V]);
1737 int w = pango_to_xr (size[X]);
1738 int h = pango_to_xr (size[Y]);
1741 if (bb[V][0] + h >= bb[V][1] && !(options & TAB_ROTATE))
1743 PangoLayoutIter *iter;
1746 /* Choose a breakpoint between lines instead of in the middle of one. */
1747 iter = pango_layout_get_iter (font->layout);
1750 PangoRectangle extents;
1754 pango_layout_iter_get_line_extents (iter, NULL, &extents);
1755 pango_layout_iter_get_line_yrange (iter, &y0, &y1);
1756 extents.x = pango_to_xr (extents.x);
1757 extents.y = pango_to_xr (y0);
1758 extents.width = pango_to_xr (extents.width);
1759 extents.height = pango_to_xr (y1 - y0);
1760 bottom = bb[V][0] + extents.y + extents.height;
1761 if (bottom < bb[V][1])
1763 if (brk && clip[H][0] != clip[H][1])
1771 while (pango_layout_iter_next_line (iter));
1772 pango_layout_iter_free (iter);
1774 /* If enabled, draws a green line across the chosen breakpoint, which can
1775 be useful for debugging issues with breaking. */
1779 dump_line (xr, -xr->left_margin, best,
1780 xr->width + xr->right_margin, best,
1782 &(struct cell_color) CELL_COLOR (0, 255, 0));
1786 pango_layout_set_attributes (font->layout, NULL);
1788 if (font == &local_font)
1790 g_object_unref (G_OBJECT (font->layout));
1791 pango_font_description_free (font->desc);
1798 xr_layout_cell (struct xr_driver *xr, const struct table_cell *cell,
1799 int bb[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
1800 int *width, int *height, int *brk)
1805 /* If enabled, draws a blue rectangle around the cell extents, which can be
1806 useful for debugging layout. */
1809 if (clip[H][0] != clip[H][1])
1811 cairo_save (xr->cairo);
1812 cairo_set_source_rgb (xr->cairo, 0, 0, 1);
1813 dump_rectangle (xr, bb[H][0], bb[V][0], bb[H][1], bb[V][1]);
1814 cairo_restore (xr->cairo);
1820 *height = xr_layout_cell_text (xr, cell, bb, clip, width, brk);
1823 struct output_driver_factory pdf_driver_factory =
1824 { "pdf", "pspp.pdf", xr_pdf_create };
1825 struct output_driver_factory ps_driver_factory =
1826 { "ps", "pspp.ps", xr_ps_create };
1827 struct output_driver_factory svg_driver_factory =
1828 { "svg", "pspp.svg", xr_svg_create };
1830 static const struct output_driver_class cairo_driver_class =
1838 /* GUI rendering helpers. */
1842 struct output_item *item;
1845 struct render_pager *p;
1846 struct xr_driver *xr;
1849 #define CHART_WIDTH 500
1850 #define CHART_HEIGHT 375
1855 xr_driver_create (cairo_t *cairo, struct string_map *options)
1857 struct xr_driver *xr = xr_allocate ("cairo", 0, options, 1.0);
1858 xr_set_cairo (xr, cairo);
1862 /* Destroy XR, which should have been created with xr_driver_create(). Any
1863 cairo_t added to XR is not destroyed, because it is owned by the client. */
1865 xr_driver_destroy (struct xr_driver *xr)
1870 output_driver_destroy (&xr->driver);
1874 static struct xr_rendering *
1875 xr_rendering_create_text (struct xr_driver *xr, const char *text, cairo_t *cr)
1877 struct table_item *table_item;
1878 struct xr_rendering *r;
1880 table_item = table_item_create (table_from_string (text), NULL, NULL);
1881 r = xr_rendering_create (xr, &table_item->output_item, cr);
1882 table_item_unref (table_item);
1888 xr_rendering_apply_options (struct xr_rendering *xr, struct string_map *o)
1890 if (is_table_item (xr->item))
1891 apply_options (xr->xr, o);
1894 struct xr_rendering *
1895 xr_rendering_create (struct xr_driver *xr, const struct output_item *item,
1898 struct xr_rendering *r = NULL;
1900 if (is_text_item (item))
1901 r = xr_rendering_create_text (xr, text_item_get_text (to_text_item (item)),
1903 else if (is_message_item (item))
1905 const struct message_item *message_item = to_message_item (item);
1906 char *s = msg_to_string (message_item_get_msg (message_item));
1907 r = xr_rendering_create_text (xr, s, cr);
1910 else if (is_table_item (item))
1912 r = xzalloc (sizeof *r);
1913 r->item = output_item_ref (item);
1915 xr_set_cairo (xr, cr);
1916 r->p = render_pager_create (xr->params, to_table_item (item));
1918 else if (is_chart_item (item))
1920 r = xzalloc (sizeof *r);
1921 r->item = output_item_ref (item);
1923 else if (is_group_open_item (item))
1924 r = xr_rendering_create_text (xr, to_group_open_item (item)->command_name,
1931 xr_rendering_destroy (struct xr_rendering *r)
1935 output_item_unref (r->item);
1936 render_pager_destroy (r->p);
1942 xr_rendering_measure (const struct xr_rendering *r, int *wp, int *hp)
1946 if (is_table_item (r->item))
1948 w = render_pager_get_size (r->p, H) / XR_POINT;
1949 h = render_pager_get_size (r->p, V) / XR_POINT;
1963 static void xr_draw_chart (const struct chart_item *, cairo_t *,
1964 double x, double y, double width, double height);
1968 xr_rendering_draw (struct xr_rendering *r, cairo_t *cr,
1969 int x0, int y0, int x1, int y1)
1971 if (is_table_item (r->item))
1973 struct xr_driver *xr = r->xr;
1975 xr_set_cairo (xr, cr);
1977 render_pager_draw_region (r->p, x0 * XR_POINT, y0 * XR_POINT,
1978 (x1 - x0) * XR_POINT, (y1 - y0) * XR_POINT);
1981 xr_draw_chart (to_chart_item (r->item), cr,
1982 0, 0, CHART_WIDTH, CHART_HEIGHT);
1986 xr_draw_chart (const struct chart_item *chart_item, cairo_t *cr,
1987 double x, double y, double width, double height)
1989 struct xrchart_geometry geom;
1992 cairo_translate (cr, x, y + height);
1993 cairo_scale (cr, 1.0, -1.0);
1994 xrchart_geometry_init (cr, &geom, width, height);
1995 if (is_boxplot (chart_item))
1996 xrchart_draw_boxplot (chart_item, cr, &geom);
1997 else if (is_histogram_chart (chart_item))
1998 xrchart_draw_histogram (chart_item, cr, &geom);
1999 else if (is_np_plot_chart (chart_item))
2000 xrchart_draw_np_plot (chart_item, cr, &geom);
2001 else if (is_piechart (chart_item))
2002 xrchart_draw_piechart (chart_item, cr, &geom);
2003 else if (is_barchart (chart_item))
2004 xrchart_draw_barchart (chart_item, cr, &geom);
2005 else if (is_roc_chart (chart_item))
2006 xrchart_draw_roc (chart_item, cr, &geom);
2007 else if (is_scree (chart_item))
2008 xrchart_draw_scree (chart_item, cr, &geom);
2009 else if (is_spreadlevel_plot_chart (chart_item))
2010 xrchart_draw_spreadlevel (chart_item, cr, &geom);
2011 else if (is_scatterplot_chart (chart_item))
2012 xrchart_draw_scatterplot (chart_item, cr, &geom);
2015 xrchart_geometry_free (cr, &geom);
2021 xr_draw_png_chart (const struct chart_item *item,
2022 const char *file_name_template, int number,
2023 const struct cell_color *fg,
2024 const struct cell_color *bg)
2026 const int width = 640;
2027 const int length = 480;
2029 cairo_surface_t *surface;
2030 cairo_status_t status;
2031 const char *number_pos;
2035 number_pos = strchr (file_name_template, '#');
2036 if (number_pos != NULL)
2037 file_name = xasprintf ("%.*s%d%s.png", (int) (number_pos - file_name_template),
2038 file_name_template, number, number_pos + 1);
2040 file_name = xasprintf ("%s.png", file_name_template);
2042 surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, length);
2043 cr = cairo_create (surface);
2045 cairo_set_source_rgb (cr, bg->r / 255.0, bg->g / 255.0, bg->b / 255.0);
2048 cairo_set_source_rgb (cr, fg->r / 255.0, fg->g / 255.0, fg->b / 255.0);
2050 xr_draw_chart (item, cr, 0.0, 0.0, width, length);
2052 status = cairo_surface_write_to_png (surface, file_name);
2053 if (status != CAIRO_STATUS_SUCCESS)
2054 msg (ME, _("error writing output file `%s': %s"),
2055 file_name, cairo_status_to_string (status));
2058 cairo_surface_destroy (surface);
2065 xr_draw_eps_chart (const struct chart_item *item,
2066 const char *file_name_template, int number,
2067 const struct cell_color *fg,
2068 const struct cell_color *bg)
2070 const int width = 640;
2071 const int length = 480;
2073 cairo_surface_t *surface;
2074 const char *number_pos;
2078 number_pos = strchr (file_name_template, '#');
2079 if (number_pos != NULL)
2080 file_name = xasprintf ("%.*s%d%s.eps", (int) (number_pos - file_name_template),
2081 file_name_template, number, number_pos + 1);
2083 file_name = xasprintf ("%s.eps", file_name_template);
2085 surface = cairo_ps_surface_create (file_name, width, length);
2086 cairo_ps_surface_set_eps (surface, true);
2087 cr = cairo_create (surface);
2089 cairo_set_source_rgb (cr, bg->r / 255.0, bg->g / 255.0, bg->b / 255.0);
2092 cairo_set_source_rgb (cr, fg->r / 255.0, fg->g / 255.0, fg->b / 255.0);
2094 xr_draw_chart (item, cr, 0.0, 0.0, width, length);
2097 cairo_surface_destroy (surface);
2104 struct xr_table_state
2106 struct xr_render_fsm fsm;
2107 struct render_pager *p;
2111 xr_table_render (struct xr_render_fsm *fsm, struct xr_driver *xr)
2113 struct xr_table_state *ts = UP_CAST (fsm, struct xr_table_state, fsm);
2115 while (render_pager_has_next (ts->p))
2119 used = render_pager_draw_next (ts->p, xr->length - xr->y);
2132 xr_table_destroy (struct xr_render_fsm *fsm)
2134 struct xr_table_state *ts = UP_CAST (fsm, struct xr_table_state, fsm);
2136 render_pager_destroy (ts->p);
2140 static struct xr_render_fsm *
2141 xr_render_table (struct xr_driver *xr, struct table_item *table_item)
2143 struct xr_table_state *ts;
2145 ts = xmalloc (sizeof *ts);
2146 ts->fsm.render = xr_table_render;
2147 ts->fsm.destroy = xr_table_destroy;
2150 xr->y += xr->char_height;
2152 ts->p = render_pager_create (xr->params, table_item);
2153 table_item_unref (table_item);
2158 struct xr_chart_state
2160 struct xr_render_fsm fsm;
2161 struct chart_item *chart_item;
2165 xr_chart_render (struct xr_render_fsm *fsm, struct xr_driver *xr)
2167 struct xr_chart_state *cs = UP_CAST (fsm, struct xr_chart_state, fsm);
2169 const int chart_height = 0.8 * (xr->length < xr->width ? xr->length : xr->width);
2171 if (xr->y > xr->length - chart_height)
2174 if (xr->cairo != NULL)
2176 xr_draw_chart (cs->chart_item, xr->cairo,
2179 xr_to_pt (xr->width),
2180 xr_to_pt (chart_height));
2182 xr->y += chart_height;
2188 xr_chart_destroy (struct xr_render_fsm *fsm)
2190 struct xr_chart_state *cs = UP_CAST (fsm, struct xr_chart_state, fsm);
2192 chart_item_unref (cs->chart_item);
2196 static struct xr_render_fsm *
2197 xr_render_chart (const struct chart_item *chart_item)
2199 struct xr_chart_state *cs;
2201 cs = xmalloc (sizeof *cs);
2202 cs->fsm.render = xr_chart_render;
2203 cs->fsm.destroy = xr_chart_destroy;
2204 cs->chart_item = chart_item_ref (chart_item);
2210 xr_eject_render (struct xr_render_fsm *fsm UNUSED, struct xr_driver *xr)
2216 xr_eject_destroy (struct xr_render_fsm *fsm UNUSED)
2218 /* Nothing to do. */
2221 static struct xr_render_fsm *
2222 xr_render_eject (void)
2224 static struct xr_render_fsm eject_renderer =
2230 return &eject_renderer;
2233 static struct xr_render_fsm *
2234 xr_render_text (struct xr_driver *xr, const struct text_item *text_item)
2236 enum text_item_type type = text_item_get_type (text_item);
2237 const char *text = text_item_get_text (text_item);
2241 case TEXT_ITEM_PAGE_TITLE:
2242 string_map_replace (&xr->heading_vars, "PageTitle", text);
2245 case TEXT_ITEM_EJECT_PAGE:
2247 return xr_render_eject ();
2251 return xr_render_table (
2252 xr, text_item_to_table_item (text_item_ref (text_item)));
2258 static struct xr_render_fsm *
2259 xr_render_message (struct xr_driver *xr,
2260 const struct message_item *message_item)
2262 char *s = msg_to_string (message_item_get_msg (message_item));
2263 struct text_item *item = text_item_create (TEXT_ITEM_LOG, s);
2265 return xr_render_table (xr, text_item_to_table_item (item));
2268 static struct xr_render_fsm *
2269 xr_render_output_item (struct xr_driver *xr,
2270 const struct output_item *output_item)
2272 if (is_table_item (output_item))
2273 return xr_render_table (xr, table_item_ref (to_table_item (output_item)));
2274 else if (is_chart_item (output_item))
2275 return xr_render_chart (to_chart_item (output_item));
2276 else if (is_text_item (output_item))
2277 return xr_render_text (xr, to_text_item (output_item));
2278 else if (is_message_item (output_item))
2279 return xr_render_message (xr, to_message_item (output_item));
2285 xr_draw_svg_file (struct xr_rendering *r,
2286 const char *filename)
2290 xr_rendering_measure (r, &width, &height);
2291 cairo_surface_t *surface = cairo_svg_surface_create (filename, width, height);
2294 g_error ("Could not create cairo svg surface with file %s", filename);
2297 cairo_t *cr = cairo_create (surface);
2298 xr_rendering_draw (r, cr, 0, 0, width, height);
2300 cairo_surface_destroy (surface);