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;
178 static const struct output_driver_class cairo_driver_class;
180 static void xr_driver_destroy_fsm (struct xr_driver *);
181 static void xr_driver_run_fsm (struct xr_driver *);
183 static void xr_draw_line (void *, int bb[TABLE_N_AXES][2],
184 enum render_line_style styles[TABLE_N_AXES][2],
185 struct cell_color colors[TABLE_N_AXES][2]);
186 static void xr_measure_cell_width (void *, const struct table_cell *,
188 static int xr_measure_cell_height (void *, const struct table_cell *,
190 static void xr_draw_cell (void *, const struct table_cell *, int color_idx,
191 int bb[TABLE_N_AXES][2], int valign_offset,
192 int spill[TABLE_N_AXES][2],
193 int clip[TABLE_N_AXES][2]);
194 static int xr_adjust_break (void *, const struct table_cell *,
195 int width, int height);
197 static struct xr_render_fsm *xr_render_output_item (
198 struct xr_driver *, const struct output_item *);
200 /* Output driver basics. */
202 static struct xr_driver *
203 xr_driver_cast (struct output_driver *driver)
205 assert (driver->class == &cairo_driver_class);
206 return UP_CAST (driver, struct xr_driver, driver);
209 static struct driver_option *
210 opt (struct output_driver *d, struct string_map *options, const char *key,
211 const char *default_value)
213 return driver_option_get (d, options, key, default_value);
217 lookup_color_name (const char *s)
221 struct hmap_node hmap_node;
226 static struct color colors[] =
228 { .name = "aliceblue", .code = 0xf0f8ff },
229 { .name = "antiquewhite", .code = 0xfaebd7 },
230 { .name = "aqua", .code = 0x00ffff },
231 { .name = "aquamarine", .code = 0x7fffd4 },
232 { .name = "azure", .code = 0xf0ffff },
233 { .name = "beige", .code = 0xf5f5dc },
234 { .name = "bisque", .code = 0xffe4c4 },
235 { .name = "black", .code = 0x000000 },
236 { .name = "blanchedalmond", .code = 0xffebcd },
237 { .name = "blue", .code = 0x0000ff },
238 { .name = "blueviolet", .code = 0x8a2be2 },
239 { .name = "brown", .code = 0xa52a2a },
240 { .name = "burlywood", .code = 0xdeb887 },
241 { .name = "cadetblue", .code = 0x5f9ea0 },
242 { .name = "chartreuse", .code = 0x7fff00 },
243 { .name = "chocolate", .code = 0xd2691e },
244 { .name = "coral", .code = 0xff7f50 },
245 { .name = "cornflowerblue", .code = 0x6495ed },
246 { .name = "cornsilk", .code = 0xfff8dc },
247 { .name = "crimson", .code = 0xdc143c },
248 { .name = "cyan", .code = 0x00ffff },
249 { .name = "darkblue", .code = 0x00008b },
250 { .name = "darkcyan", .code = 0x008b8b },
251 { .name = "darkgoldenrod", .code = 0xb8860b },
252 { .name = "darkgray", .code = 0xa9a9a9 },
253 { .name = "darkgreen", .code = 0x006400 },
254 { .name = "darkgrey", .code = 0xa9a9a9 },
255 { .name = "darkkhaki", .code = 0xbdb76b },
256 { .name = "darkmagenta", .code = 0x8b008b },
257 { .name = "darkolivegreen", .code = 0x556b2f },
258 { .name = "darkorange", .code = 0xff8c00 },
259 { .name = "darkorchid", .code = 0x9932cc },
260 { .name = "darkred", .code = 0x8b0000 },
261 { .name = "darksalmon", .code = 0xe9967a },
262 { .name = "darkseagreen", .code = 0x8fbc8f },
263 { .name = "darkslateblue", .code = 0x483d8b },
264 { .name = "darkslategray", .code = 0x2f4f4f },
265 { .name = "darkslategrey", .code = 0x2f4f4f },
266 { .name = "darkturquoise", .code = 0x00ced1 },
267 { .name = "darkviolet", .code = 0x9400d3 },
268 { .name = "deeppink", .code = 0xff1493 },
269 { .name = "deepskyblue", .code = 0x00bfff },
270 { .name = "dimgray", .code = 0x696969 },
271 { .name = "dimgrey", .code = 0x696969 },
272 { .name = "dodgerblue", .code = 0x1e90ff },
273 { .name = "firebrick", .code = 0xb22222 },
274 { .name = "floralwhite", .code = 0xfffaf0 },
275 { .name = "forestgreen", .code = 0x228b22 },
276 { .name = "fuchsia", .code = 0xff00ff },
277 { .name = "gainsboro", .code = 0xdcdcdc },
278 { .name = "ghostwhite", .code = 0xf8f8ff },
279 { .name = "gold", .code = 0xffd700 },
280 { .name = "goldenrod", .code = 0xdaa520 },
281 { .name = "gray", .code = 0x808080 },
282 { .name = "green", .code = 0x008000 },
283 { .name = "greenyellow", .code = 0xadff2f },
284 { .name = "grey", .code = 0x808080 },
285 { .name = "honeydew", .code = 0xf0fff0 },
286 { .name = "hotpink", .code = 0xff69b4 },
287 { .name = "indianred", .code = 0xcd5c5c },
288 { .name = "indigo", .code = 0x4b0082 },
289 { .name = "ivory", .code = 0xfffff0 },
290 { .name = "khaki", .code = 0xf0e68c },
291 { .name = "lavender", .code = 0xe6e6fa },
292 { .name = "lavenderblush", .code = 0xfff0f5 },
293 { .name = "lawngreen", .code = 0x7cfc00 },
294 { .name = "lemonchiffon", .code = 0xfffacd },
295 { .name = "lightblue", .code = 0xadd8e6 },
296 { .name = "lightcoral", .code = 0xf08080 },
297 { .name = "lightcyan", .code = 0xe0ffff },
298 { .name = "lightgoldenrodyellow", .code = 0xfafad2 },
299 { .name = "lightgray", .code = 0xd3d3d3 },
300 { .name = "lightgreen", .code = 0x90ee90 },
301 { .name = "lightgrey", .code = 0xd3d3d3 },
302 { .name = "lightpink", .code = 0xffb6c1 },
303 { .name = "lightsalmon", .code = 0xffa07a },
304 { .name = "lightseagreen", .code = 0x20b2aa },
305 { .name = "lightskyblue", .code = 0x87cefa },
306 { .name = "lightslategray", .code = 0x778899 },
307 { .name = "lightslategrey", .code = 0x778899 },
308 { .name = "lightsteelblue", .code = 0xb0c4de },
309 { .name = "lightyellow", .code = 0xffffe0 },
310 { .name = "lime", .code = 0x00ff00 },
311 { .name = "limegreen", .code = 0x32cd32 },
312 { .name = "linen", .code = 0xfaf0e6 },
313 { .name = "magenta", .code = 0xff00ff },
314 { .name = "maroon", .code = 0x800000 },
315 { .name = "mediumaquamarine", .code = 0x66cdaa },
316 { .name = "mediumblue", .code = 0x0000cd },
317 { .name = "mediumorchid", .code = 0xba55d3 },
318 { .name = "mediumpurple", .code = 0x9370db },
319 { .name = "mediumseagreen", .code = 0x3cb371 },
320 { .name = "mediumslateblue", .code = 0x7b68ee },
321 { .name = "mediumspringgreen", .code = 0x00fa9a },
322 { .name = "mediumturquoise", .code = 0x48d1cc },
323 { .name = "mediumvioletred", .code = 0xc71585 },
324 { .name = "midnightblue", .code = 0x191970 },
325 { .name = "mintcream", .code = 0xf5fffa },
326 { .name = "mistyrose", .code = 0xffe4e1 },
327 { .name = "moccasin", .code = 0xffe4b5 },
328 { .name = "navajowhite", .code = 0xffdead },
329 { .name = "navy", .code = 0x000080 },
330 { .name = "oldlace", .code = 0xfdf5e6 },
331 { .name = "olive", .code = 0x808000 },
332 { .name = "olivedrab", .code = 0x6b8e23 },
333 { .name = "orange", .code = 0xffa500 },
334 { .name = "orangered", .code = 0xff4500 },
335 { .name = "orchid", .code = 0xda70d6 },
336 { .name = "palegoldenrod", .code = 0xeee8aa },
337 { .name = "palegreen", .code = 0x98fb98 },
338 { .name = "paleturquoise", .code = 0xafeeee },
339 { .name = "palevioletred", .code = 0xdb7093 },
340 { .name = "papayawhip", .code = 0xffefd5 },
341 { .name = "peachpuff", .code = 0xffdab9 },
342 { .name = "peru", .code = 0xcd853f },
343 { .name = "pink", .code = 0xffc0cb },
344 { .name = "plum", .code = 0xdda0dd },
345 { .name = "powderblue", .code = 0xb0e0e6 },
346 { .name = "purple", .code = 0x800080 },
347 { .name = "red", .code = 0xff0000 },
348 { .name = "rosybrown", .code = 0xbc8f8f },
349 { .name = "royalblue", .code = 0x4169e1 },
350 { .name = "saddlebrown", .code = 0x8b4513 },
351 { .name = "salmon", .code = 0xfa8072 },
352 { .name = "sandybrown", .code = 0xf4a460 },
353 { .name = "seagreen", .code = 0x2e8b57 },
354 { .name = "seashell", .code = 0xfff5ee },
355 { .name = "sienna", .code = 0xa0522d },
356 { .name = "silver", .code = 0xc0c0c0 },
357 { .name = "skyblue", .code = 0x87ceeb },
358 { .name = "slateblue", .code = 0x6a5acd },
359 { .name = "slategray", .code = 0x708090 },
360 { .name = "slategrey", .code = 0x708090 },
361 { .name = "snow", .code = 0xfffafa },
362 { .name = "springgreen", .code = 0x00ff7f },
363 { .name = "steelblue", .code = 0x4682b4 },
364 { .name = "tan", .code = 0xd2b48c },
365 { .name = "teal", .code = 0x008080 },
366 { .name = "thistle", .code = 0xd8bfd8 },
367 { .name = "tomato", .code = 0xff6347 },
368 { .name = "turquoise", .code = 0x40e0d0 },
369 { .name = "violet", .code = 0xee82ee },
370 { .name = "wheat", .code = 0xf5deb3 },
371 { .name = "white", .code = 0xffffff },
372 { .name = "whitesmoke", .code = 0xf5f5f5 },
373 { .name = "yellow", .code = 0xffff00 },
374 { .name = "yellowgreen", .code = 0x9acd32 },
377 static struct hmap color_table = HMAP_INITIALIZER (color_table);
379 if (hmap_is_empty (&color_table))
380 for (size_t i = 0; i < sizeof colors / sizeof *colors; i++)
381 hmap_insert (&color_table, &colors[i].hmap_node,
382 hash_string (colors[i].name, 0));
384 const struct color *color;
385 HMAP_FOR_EACH_WITH_HASH (color, struct color, hmap_node,
386 hash_string (s, 0), &color_table)
387 if (!strcmp (color->name, s))
393 parse_color__ (const char *s, struct cell_color *color)
396 uint16_t r16, g16, b16;
398 if (sscanf (s, "#%4"SCNx16"%4"SCNx16"%4"SCNx16"%n",
399 &r16, &g16, &b16, &len) == 3
411 if (sscanf (s, "#%2"SCNx8"%2"SCNx8"%2"SCNx8"%n", &r, &g, &b, &len) == 3
422 if (sscanf (s, "%2"SCNx8"%2"SCNx8"%2"SCNx8"%n", &r, &g, &b, &len) == 3
433 if (sscanf (s, "rgb (%"SCNi8" , %"SCNi8" , %"SCNi8") %n",
434 &r, &g, &b, &len) == 3
443 /* rgba(r,g,b,a), ignoring a. */
444 if (sscanf (s, "rgba (%"SCNi8" , %"SCNi8" , %"SCNi8", %*f) %n",
445 &r, &g, &b, &len) == 3
454 int code = lookup_color_name (s);
457 color->r = code >> 16;
458 color->g = code >> 8;
466 /* Parse color information specified by KEY into {RED,GREEN,BLUE}.
467 Currently, the input string must be of the form "#RRRRGGGGBBBB"
468 Future implementations might allow things like "yellow" and
469 "sky-blue-ultra-brown"
472 parse_color (struct output_driver *d, struct string_map *options,
473 const char *key, const char *default_value,
474 struct cell_color *color)
476 char *string = parse_string (opt (d, options, key, default_value));
477 if (!parse_color__ (string, color) && !parse_color__ (default_value, color))
478 *color = (struct cell_color) CELL_COLOR_BLACK;
482 static PangoFontDescription *
483 parse_font (const char *font, int default_size, bool bold, bool italic)
485 if (!c_strcasecmp (font, "Monospaced"))
488 PangoFontDescription *desc = pango_font_description_from_string (font);
492 /* If the font description didn't include an explicit font size, then set it
493 to DEFAULT_SIZE, which is in inch/72000 units. */
494 if (!(pango_font_description_get_set_fields (desc) & PANGO_FONT_MASK_SIZE))
495 pango_font_description_set_size (desc,
496 (default_size / 1000.0) * PANGO_SCALE);
498 pango_font_description_set_weight (desc, (bold
500 : PANGO_WEIGHT_NORMAL));
501 pango_font_description_set_style (desc, (italic
503 : PANGO_STYLE_NORMAL));
508 static PangoFontDescription *
509 parse_font_option (struct output_driver *d, struct string_map *options,
510 const char *key, const char *default_value,
511 int default_size, bool bold, bool italic)
513 char *string = parse_string (opt (d, options, key, default_value));
514 PangoFontDescription *desc = parse_font (string, default_size, bold, italic);
517 msg (MW, _("`%s': bad font specification"), string);
519 /* Fall back to DEFAULT_VALUE, which had better be a valid font
521 desc = parse_font (default_value, default_size, bold, italic);
522 assert (desc != NULL);
530 apply_options (struct xr_driver *xr, struct string_map *o)
532 struct output_driver *d = &xr->driver;
534 /* In inch/72000 units used by parse_paper_size() and parse_dimension(). */
535 int left_margin, right_margin;
536 int top_margin, bottom_margin;
537 int paper_width, paper_length;
539 int min_break[TABLE_N_AXES];
541 /* Scale factor from inch/72000 to inch/(72 * XR_POINT). */
542 const double scale = XR_POINT / 1000.;
546 for (i = 0; i < XR_N_FONTS; i++)
548 struct xr_font *font = &xr->fonts[i];
550 if (font->desc != NULL)
551 pango_font_description_free (font->desc);
554 font_size = parse_int (opt (d, o, "font-size", "10000"), 1000, 1000000);
555 xr->fonts[XR_FONT_FIXED].desc = parse_font_option
556 (d, o, "fixed-font", "monospace", font_size, false, false);
557 xr->fonts[XR_FONT_PROPORTIONAL].desc = parse_font_option (
558 d, o, "prop-font", "sans serif", font_size, false, false);
559 xr->fonts[XR_FONT_EMPHASIS].desc = parse_font_option (
560 d, o, "emph-font", "sans serif", font_size, false, true);
562 parse_color (d, o, "background-color", "#FFFFFFFFFFFF", &xr->bg);
563 parse_color (d, o, "foreground-color", "#000000000000", &xr->fg);
565 xr->transparent = parse_boolean (opt (d, o, "transparent", "false"));
566 xr->systemcolors = parse_boolean (opt (d, o, "systemcolors", "false"));
568 /* Get dimensions. */
569 parse_paper_size (opt (d, o, "paper-size", ""), &paper_width, &paper_length);
570 left_margin = parse_dimension (opt (d, o, "left-margin", ".5in"));
571 right_margin = parse_dimension (opt (d, o, "right-margin", ".5in"));
572 top_margin = parse_dimension (opt (d, o, "top-margin", ".5in"));
573 bottom_margin = parse_dimension (opt (d, o, "bottom-margin", ".5in"));
575 min_break[H] = parse_dimension (opt (d, o, "min-hbreak", NULL)) * scale;
576 min_break[V] = parse_dimension (opt (d, o, "min-vbreak", NULL)) * scale;
578 int object_spacing = (parse_dimension (opt (d, o, "object-spacing", NULL))
581 /* Convert to inch/(XR_POINT * 72). */
582 xr->left_margin = left_margin * scale;
583 xr->right_margin = right_margin * scale;
584 xr->top_margin = top_margin * scale;
585 xr->bottom_margin = bottom_margin * scale;
586 xr->width = (paper_width - left_margin - right_margin) * scale;
587 xr->length = (paper_length - top_margin - bottom_margin) * scale;
588 xr->min_break[H] = min_break[H] >= 0 ? min_break[H] : xr->width / 2;
589 xr->min_break[V] = min_break[V] >= 0 ? min_break[V] : xr->length / 2;
590 xr->object_spacing = object_spacing >= 0 ? object_spacing : XR_POINT * 12;
592 /* There are no headings so headings_height can stay 0. */
595 static struct xr_driver *
596 xr_allocate (const char *name, int device_type, struct string_map *o,
599 struct xr_driver *xr = xzalloc (sizeof *xr);
600 struct output_driver *d = &xr->driver;
602 output_driver_init (d, &cairo_driver_class, name, device_type);
604 /* This is a nasty kluge for an issue that does not make sense. On any
605 surface other than a screen (e.g. for output to PDF or PS or SVG), the
606 fonts are way too big by default. A "9-point" font seems to appear about
607 16 points tall. We use a scale factor for these surfaces to help, but the
608 underlying issue is a mystery. */
609 xr->font_scale = font_scale;
611 apply_options (xr, o);
617 pango_to_xr (int pango)
619 return (XR_POINT != PANGO_SCALE
620 ? ceil (pango * (1. * XR_POINT / PANGO_SCALE))
627 return (XR_POINT != PANGO_SCALE
628 ? ceil (xr * (1. / XR_POINT * PANGO_SCALE))
633 xr_measure_fonts (cairo_t *cairo, const struct xr_font fonts[XR_N_FONTS],
634 int *char_width, int *char_height)
638 for (int i = 0; i < XR_N_FONTS; i++)
640 PangoLayout *layout = pango_cairo_create_layout (cairo);
641 pango_layout_set_font_description (layout, fonts[i].desc);
643 pango_layout_set_text (layout, "0", 1);
646 pango_layout_get_size (layout, &cw, &ch);
647 *char_width = MAX (*char_width, pango_to_xr (cw));
648 *char_height = MAX (*char_height, pango_to_xr (ch));
650 g_object_unref (G_OBJECT (layout));
655 get_layout_height (PangoLayout *layout)
658 pango_layout_get_size (layout, &w, &h);
663 xr_render_page_heading (cairo_t *cairo, const PangoFontDescription *font,
664 const struct page_heading *ph, int page_number,
665 int width, bool draw, int base_y)
667 PangoLayout *layout = pango_cairo_create_layout (cairo);
668 pango_layout_set_font_description (layout, font);
671 for (size_t i = 0; i < ph->n; i++)
673 const struct page_paragraph *pp = &ph->paragraphs[i];
675 char *markup = output_driver_substitute_heading_vars (pp->markup,
677 pango_layout_set_markup (layout, markup, -1);
680 pango_layout_set_alignment (
682 (pp->halign == TABLE_HALIGN_LEFT ? PANGO_ALIGN_LEFT
683 : pp->halign == TABLE_HALIGN_CENTER ? PANGO_ALIGN_CENTER
684 : pp->halign == TABLE_HALIGN_MIXED ? PANGO_ALIGN_LEFT
685 : PANGO_ALIGN_RIGHT));
686 pango_layout_set_width (layout, xr_to_pango (width));
690 cairo_translate (cairo, 0, xr_to_pt (y + base_y));
691 pango_cairo_show_layout (cairo, layout);
692 cairo_restore (cairo);
695 y += pango_to_xr (get_layout_height (layout));
698 g_object_unref (G_OBJECT (layout));
704 xr_measure_headings (cairo_surface_t *surface,
705 const PangoFontDescription *font,
706 const struct page_heading headings[2],
707 int width, int object_spacing, int height[2])
709 cairo_t *cairo = cairo_create (surface);
711 for (int i = 0; i < 2; i++)
713 int h = xr_render_page_heading (cairo, font, &headings[i], -1,
716 /* If the top heading is nonempty, add some space below it. */
724 cairo_destroy (cairo);
729 xr_check_fonts (cairo_surface_t *surface,
730 const struct xr_font fonts[XR_N_FONTS],
731 int usable_width, int usable_length)
733 cairo_t *cairo = cairo_create (surface);
734 int char_width, char_height;
735 xr_measure_fonts (cairo, fonts, &char_width, &char_height);
736 cairo_destroy (cairo);
739 enum { MIN_WIDTH = 3, MIN_LENGTH = 3 };
740 if (usable_width / char_width < MIN_WIDTH)
742 msg (ME, _("The defined page is not wide enough to hold at least %d "
743 "characters in the default font. In fact, there's only "
744 "room for %d characters."),
745 MIN_WIDTH, usable_width / char_width);
748 if (usable_length / char_height < MIN_LENGTH)
750 msg (ME, _("The defined page is not long enough to hold at least %d "
751 "lines in the default font. In fact, there's only "
752 "room for %d lines."),
753 MIN_LENGTH, usable_length / char_height);
760 xr_set_cairo (struct xr_driver *xr, cairo_t *cairo)
764 cairo_set_line_width (xr->cairo, xr_to_pt (XR_LINE_WIDTH));
766 xr_measure_fonts (xr->cairo, xr->fonts, &xr->char_width, &xr->char_height);
768 for (int i = 0; i < XR_N_FONTS; i++)
770 struct xr_font *font = &xr->fonts[i];
771 font->layout = pango_cairo_create_layout (cairo);
772 pango_layout_set_font_description (font->layout, font->desc);
775 if (xr->params == NULL)
777 xr->params = xmalloc (sizeof *xr->params);
778 xr->params->draw_line = xr_draw_line;
779 xr->params->measure_cell_width = xr_measure_cell_width;
780 xr->params->measure_cell_height = xr_measure_cell_height;
781 xr->params->adjust_break = xr_adjust_break;
782 xr->params->draw_cell = xr_draw_cell;
783 xr->params->aux = xr;
784 xr->params->size[H] = xr->width;
785 xr->params->size[V] = xr->length;
786 xr->params->font_size[H] = xr->char_width;
787 xr->params->font_size[V] = xr->char_height;
789 int lw = XR_LINE_WIDTH;
790 int ls = XR_LINE_SPACE;
791 for (int i = 0; i < TABLE_N_AXES; i++)
793 xr->params->line_widths[i][RENDER_LINE_NONE] = 0;
794 xr->params->line_widths[i][RENDER_LINE_SINGLE] = lw;
795 xr->params->line_widths[i][RENDER_LINE_DASHED] = lw;
796 xr->params->line_widths[i][RENDER_LINE_THICK] = lw * 2;
797 xr->params->line_widths[i][RENDER_LINE_THIN] = lw / 2;
798 xr->params->line_widths[i][RENDER_LINE_DOUBLE] = 2 * lw + ls;
801 for (int i = 0; i < TABLE_N_AXES; i++)
802 xr->params->min_break[i] = xr->min_break[i];
803 xr->params->supports_margins = true;
804 xr->params->rtl = render_direction_rtl ();
807 if (!xr->systemcolors)
808 cairo_set_source_rgb (xr->cairo,
809 xr->fg.r / 255.0, xr->fg.g / 255.0, xr->fg.b / 255.0);
812 static struct output_driver *
813 xr_create (struct file_handle *fh, enum settings_output_devices device_type,
814 struct string_map *o, enum xr_output_type file_type)
816 const char *file_name = fh_get_file_name (fh);
817 struct xr_driver *xr = xr_allocate (file_name, device_type, o, 72.0 / 128.0);
818 double width_pt = xr_to_pt (xr->width + xr->left_margin + xr->right_margin);
819 double length_pt = xr_to_pt (xr->length + xr->top_margin + xr->bottom_margin);
820 if (file_type == XR_PDF)
821 xr->surface = cairo_pdf_surface_create (file_name, width_pt, length_pt);
822 else if (file_type == XR_PS)
823 xr->surface = cairo_ps_surface_create (file_name, width_pt, length_pt);
824 else if (file_type == XR_SVG)
825 xr->surface = cairo_svg_surface_create (file_name, width_pt, length_pt);
829 cairo_status_t status = cairo_surface_status (xr->surface);
830 if (status != CAIRO_STATUS_SUCCESS)
832 msg (ME, _("error opening output file `%s': %s"),
833 file_name, cairo_status_to_string (status));
837 if (!xr_check_fonts (xr->surface, xr->fonts, xr->width, xr->length))
845 output_driver_destroy (&xr->driver);
849 static struct output_driver *
850 xr_pdf_create (struct file_handle *fh, enum settings_output_devices device_type,
851 struct string_map *o)
853 return xr_create (fh, device_type, o, XR_PDF);
856 static struct output_driver *
857 xr_ps_create (struct file_handle *fh, enum settings_output_devices device_type,
858 struct string_map *o)
860 return xr_create (fh, device_type, o, XR_PS);
863 static struct output_driver *
864 xr_svg_create (struct file_handle *fh, enum settings_output_devices device_type,
865 struct string_map *o)
867 return xr_create (fh, device_type, o, XR_SVG);
871 xr_destroy (struct output_driver *driver)
873 struct xr_driver *xr = xr_driver_cast (driver);
876 xr_driver_destroy_fsm (xr);
878 if (xr->cairo != NULL)
880 cairo_surface_finish (xr->surface);
881 cairo_status_t status = cairo_status (xr->cairo);
882 if (status != CAIRO_STATUS_SUCCESS)
883 fprintf (stderr, _("error drawing output for %s driver: %s"),
884 output_driver_get_name (driver),
885 cairo_status_to_string (status));
886 cairo_surface_destroy (xr->surface);
888 cairo_destroy (xr->cairo);
891 for (i = 0; i < XR_N_FONTS; i++)
893 struct xr_font *font = &xr->fonts[i];
895 if (font->desc != NULL)
896 pango_font_description_free (font->desc);
897 if (font->layout != NULL)
898 g_object_unref (font->layout);
906 xr_flush (struct output_driver *driver)
908 struct xr_driver *xr = xr_driver_cast (driver);
910 cairo_surface_flush (cairo_get_target (xr->cairo));
914 xr_update_page_setup (struct output_driver *driver,
915 const struct page_setup *ps)
917 struct xr_driver *xr = xr_driver_cast (driver);
919 xr->initial_page_number = ps->initial_page_number;
920 xr->object_spacing = ps->object_spacing * 72 * XR_POINT;
925 int usable[TABLE_N_AXES];
926 for (int i = 0; i < 2; i++)
927 usable[i] = (ps->paper[i]
928 - (ps->margins[i][0] + ps->margins[i][1])) * 72 * XR_POINT;
930 int headings_height[2];
931 usable[V] -= xr_measure_headings (
932 xr->surface, xr->fonts[XR_FONT_PROPORTIONAL].desc, ps->headings,
933 usable[H], xr->object_spacing, headings_height);
935 enum table_axis h = ps->orientation == PAGE_LANDSCAPE;
936 enum table_axis v = !h;
937 if (!xr_check_fonts (xr->surface, xr->fonts, usable[h], usable[v]))
940 for (int i = 0; i < 2; i++)
942 page_heading_uninit (&xr->headings[i]);
943 page_heading_copy (&xr->headings[i], &ps->headings[i]);
944 xr->headings_height[i] = headings_height[i];
946 xr->width = usable[h];
947 xr->length = usable[v];
948 xr->left_margin = ps->margins[h][0] * 72 * XR_POINT;
949 xr->right_margin = ps->margins[h][1] * 72 * XR_POINT;
950 xr->top_margin = ps->margins[v][0] * 72 * XR_POINT;
951 xr->bottom_margin = ps->margins[v][1] * 72 * XR_POINT;
952 cairo_pdf_surface_set_size (xr->surface,
953 ps->paper[h] * 72.0, ps->paper[v] * 72.0);
957 xr_submit (struct output_driver *driver, const struct output_item *output_item)
959 struct xr_driver *xr = xr_driver_cast (driver);
961 if (is_page_setup_item (output_item))
963 xr_update_page_setup (driver,
964 to_page_setup_item (output_item)->page_setup);
970 xr->page_number = xr->initial_page_number - 1;
971 xr_set_cairo (xr, cairo_create (xr->surface));
972 cairo_save (xr->cairo);
973 xr_driver_next_page (xr, xr->cairo);
976 xr_driver_output_item (xr, output_item);
977 while (xr_driver_need_new_page (xr))
979 cairo_restore (xr->cairo);
980 cairo_show_page (xr->cairo);
981 cairo_save (xr->cairo);
982 xr_driver_next_page (xr, xr->cairo);
986 /* Functions for rendering a series of output items to a series of Cairo
987 contexts, with pagination.
989 Used by PSPPIRE for printing, and by the basic Cairo output driver above as
990 its underlying implementation.
992 See the big comment in cairo.h for intended usage. */
994 /* Gives new page CAIRO to XR for output. */
996 xr_driver_next_page (struct xr_driver *xr, cairo_t *cairo)
998 if (!xr->transparent)
1001 cairo_set_source_rgb (cairo,
1002 xr->bg.r / 255.0, xr->bg.g / 255.0, xr->bg.b / 255.0);
1003 cairo_rectangle (cairo, 0, 0, xr->width, xr->length);
1005 cairo_restore (cairo);
1007 cairo_translate (cairo,
1008 xr_to_pt (xr->left_margin),
1009 xr_to_pt (xr->top_margin + xr->headings_height[0]));
1015 xr_render_page_heading (xr->cairo, xr->fonts[XR_FONT_PROPORTIONAL].desc,
1016 &xr->headings[0], xr->page_number, xr->width, true,
1017 -xr->headings_height[0]);
1018 xr_render_page_heading (xr->cairo, xr->fonts[XR_FONT_PROPORTIONAL].desc,
1019 &xr->headings[1], xr->page_number, xr->width, true,
1022 xr_driver_run_fsm (xr);
1025 /* Start rendering OUTPUT_ITEM to XR. Only valid if XR is not in the middle of
1026 rendering a previous output item, that is, only if xr_driver_need_new_page()
1029 xr_driver_output_item (struct xr_driver *xr,
1030 const struct output_item *output_item)
1032 assert (xr->fsm == NULL);
1033 xr->fsm = xr_render_output_item (xr, output_item);
1034 xr_driver_run_fsm (xr);
1037 /* Returns true if XR is in the middle of rendering an output item and needs a
1038 new page to be appended using xr_driver_next_page() to make progress,
1041 xr_driver_need_new_page (const struct xr_driver *xr)
1043 return xr->fsm != NULL;
1046 /* Returns true if the current page doesn't have any content yet. */
1048 xr_driver_is_page_blank (const struct xr_driver *xr)
1054 xr_driver_destroy_fsm (struct xr_driver *xr)
1056 if (xr->fsm != NULL)
1058 xr->fsm->destroy (xr->fsm);
1064 xr_driver_run_fsm (struct xr_driver *xr)
1066 if (xr->fsm != NULL && !xr->fsm->render (xr->fsm, xr))
1067 xr_driver_destroy_fsm (xr);
1071 xr_layout_cell (struct xr_driver *, const struct table_cell *,
1072 int bb[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
1073 int *width, int *height, int *brk);
1076 set_source_rgba (cairo_t *cairo, const struct cell_color *color)
1078 cairo_set_source_rgba (cairo,
1079 color->r / 255., color->g / 255., color->b / 255.,
1080 color->alpha / 255.);
1084 dump_line (struct xr_driver *xr, int x0, int y0, int x1, int y1, int style,
1085 const struct cell_color *color)
1087 cairo_new_path (xr->cairo);
1088 if (!xr->systemcolors)
1089 set_source_rgba (xr->cairo, color);
1090 cairo_set_line_width (
1092 xr_to_pt (style == RENDER_LINE_THICK ? XR_LINE_WIDTH * 2
1093 : style == RENDER_LINE_THIN ? XR_LINE_WIDTH / 2
1095 cairo_move_to (xr->cairo, xr_to_pt (x0), xr_to_pt (y0 + xr->y));
1096 cairo_line_to (xr->cairo, xr_to_pt (x1), xr_to_pt (y1 + xr->y));
1097 cairo_stroke (xr->cairo);
1101 dump_rectangle (struct xr_driver *xr, int x0, int y0, int x1, int y1)
1103 cairo_new_path (xr->cairo);
1104 cairo_set_line_width (xr->cairo, xr_to_pt (XR_LINE_WIDTH));
1105 cairo_close_path (xr->cairo);
1106 cairo_stroke (xr->cairo);
1107 cairo_move_to (xr->cairo, xr_to_pt (x0), xr_to_pt (y0 + xr->y));
1108 cairo_line_to (xr->cairo, xr_to_pt (x1), xr_to_pt (y0 + xr->y));
1109 cairo_line_to (xr->cairo, xr_to_pt (x1), xr_to_pt (y1 + xr->y));
1110 cairo_line_to (xr->cairo, xr_to_pt (x0), xr_to_pt (y1 + xr->y));
1114 fill_rectangle (struct xr_driver *xr, int x0, int y0, int x1, int y1)
1116 cairo_new_path (xr->cairo);
1117 cairo_set_line_width (xr->cairo, xr_to_pt (XR_LINE_WIDTH));
1118 cairo_rectangle (xr->cairo,
1119 xr_to_pt (x0), xr_to_pt (y0 + xr->y),
1120 xr_to_pt (x1 - x0), xr_to_pt (y1 - y0));
1121 cairo_fill (xr->cairo);
1124 /* Draws a horizontal line X0...X2 at Y if LEFT says so,
1125 shortening it to X0...X1 if SHORTEN is true.
1126 Draws a horizontal line X1...X3 at Y if RIGHT says so,
1127 shortening it to X2...X3 if SHORTEN is true. */
1129 horz_line (struct xr_driver *xr, int x0, int x1, int x2, int x3, int y,
1130 enum render_line_style left, enum render_line_style right,
1131 const struct cell_color *left_color,
1132 const struct cell_color *right_color,
1135 if (left != RENDER_LINE_NONE && right != RENDER_LINE_NONE && !shorten
1136 && cell_color_equal (left_color, right_color))
1137 dump_line (xr, x0, y, x3, y, left, left_color);
1140 if (left != RENDER_LINE_NONE)
1141 dump_line (xr, x0, y, shorten ? x1 : x2, y, left, left_color);
1142 if (right != RENDER_LINE_NONE)
1143 dump_line (xr, shorten ? x2 : x1, y, x3, y, right, right_color);
1147 /* Draws a vertical line Y0...Y2 at X if TOP says so,
1148 shortening it to Y0...Y1 if SHORTEN is true.
1149 Draws a vertical line Y1...Y3 at X if BOTTOM says so,
1150 shortening it to Y2...Y3 if SHORTEN is true. */
1152 vert_line (struct xr_driver *xr, int y0, int y1, int y2, int y3, int x,
1153 enum render_line_style top, enum render_line_style bottom,
1154 const struct cell_color *top_color,
1155 const struct cell_color *bottom_color,
1158 if (top != RENDER_LINE_NONE && bottom != RENDER_LINE_NONE && !shorten
1159 && cell_color_equal (top_color, bottom_color))
1160 dump_line (xr, x, y0, x, y3, top, top_color);
1163 if (top != RENDER_LINE_NONE)
1164 dump_line (xr, x, y0, x, shorten ? y1 : y2, top, top_color);
1165 if (bottom != RENDER_LINE_NONE)
1166 dump_line (xr, x, shorten ? y2 : y1, x, y3, bottom, bottom_color);
1171 xr_draw_line (void *xr_, int bb[TABLE_N_AXES][2],
1172 enum render_line_style styles[TABLE_N_AXES][2],
1173 struct cell_color colors[TABLE_N_AXES][2])
1175 const int x0 = bb[H][0];
1176 const int y0 = bb[V][0];
1177 const int x3 = bb[H][1];
1178 const int y3 = bb[V][1];
1179 const int top = styles[H][0];
1180 const int bottom = styles[H][1];
1182 int start_side = render_direction_rtl();
1183 int end_side = !start_side;
1184 const int start_of_line = styles[V][start_side];
1185 const int end_of_line = styles[V][end_side];
1186 const struct cell_color *top_color = &colors[H][0];
1187 const struct cell_color *bottom_color = &colors[H][1];
1188 const struct cell_color *start_color = &colors[V][start_side];
1189 const struct cell_color *end_color = &colors[V][end_side];
1191 /* The algorithm here is somewhat subtle, to allow it to handle
1192 all the kinds of intersections that we need.
1194 Three additional ordinates are assigned along the x axis. The
1195 first is xc, midway between x0 and x3. The others are x1 and
1196 x2; for a single vertical line these are equal to xc, and for
1197 a double vertical line they are the ordinates of the left and
1198 right half of the double line.
1200 yc, y1, and y2 are assigned similarly along the y axis.
1202 The following diagram shows the coordinate system and output
1203 for double top and bottom lines, single left line, and no
1207 y0 ________________________
1213 y1 = y2 = yc |######### # |
1218 y3 |________#_____#_______|
1220 struct xr_driver *xr = xr_;
1222 /* Offset from center of each line in a pair of double lines. */
1223 int double_line_ofs = (XR_LINE_SPACE + XR_LINE_WIDTH) / 2;
1225 /* Are the lines along each axis single or double?
1226 (It doesn't make sense to have different kinds of line on the
1227 same axis, so we don't try to gracefully handle that case.) */
1228 bool double_vert = top == RENDER_LINE_DOUBLE || bottom == RENDER_LINE_DOUBLE;
1229 bool double_horz = start_of_line == RENDER_LINE_DOUBLE || end_of_line == RENDER_LINE_DOUBLE;
1231 /* When horizontal lines are doubled,
1232 the left-side line along y1 normally runs from x0 to x2,
1233 and the right-side line along y1 from x3 to x1.
1234 If the top-side line is also doubled, we shorten the y1 lines,
1235 so that the left-side line runs only to x1,
1236 and the right-side line only to x2.
1237 Otherwise, the horizontal line at y = y1 below would cut off
1238 the intersection, which looks ugly:
1240 y0 ________________________
1245 y1 |######### ########|
1248 y2 |######################|
1251 y3 |______________________|
1252 It is more of a judgment call when the horizontal line is
1253 single. We actually choose to cut off the line anyhow, as
1254 shown in the first diagram above.
1256 bool shorten_y1_lines = top == RENDER_LINE_DOUBLE;
1257 bool shorten_y2_lines = bottom == RENDER_LINE_DOUBLE;
1258 bool shorten_yc_line = shorten_y1_lines && shorten_y2_lines;
1259 int horz_line_ofs = double_vert ? double_line_ofs : 0;
1260 int xc = (x0 + x3) / 2;
1261 int x1 = xc - horz_line_ofs;
1262 int x2 = xc + horz_line_ofs;
1264 bool shorten_x1_lines = start_of_line == RENDER_LINE_DOUBLE;
1265 bool shorten_x2_lines = end_of_line == RENDER_LINE_DOUBLE;
1266 bool shorten_xc_line = shorten_x1_lines && shorten_x2_lines;
1267 int vert_line_ofs = double_horz ? double_line_ofs : 0;
1268 int yc = (y0 + y3) / 2;
1269 int y1 = yc - vert_line_ofs;
1270 int y2 = yc + vert_line_ofs;
1273 horz_line (xr, x0, x1, x2, x3, yc, start_of_line, end_of_line,
1274 start_color, end_color, shorten_yc_line);
1277 horz_line (xr, x0, x1, x2, x3, y1, start_of_line, end_of_line,
1278 start_color, end_color, shorten_y1_lines);
1279 horz_line (xr, x0, x1, x2, x3, y2, start_of_line, end_of_line,
1280 start_color, end_color, shorten_y2_lines);
1284 vert_line (xr, y0, y1, y2, y3, xc, top, bottom, top_color, bottom_color,
1288 vert_line (xr, y0, y1, y2, y3, x1, top, bottom, top_color, bottom_color,
1290 vert_line (xr, y0, y1, y2, y3, x2, top, bottom, top_color, bottom_color,
1296 xr_measure_cell_width (void *xr_, const struct table_cell *cell,
1297 int *min_width, int *max_width)
1299 struct xr_driver *xr = xr_;
1300 int bb[TABLE_N_AXES][2];
1301 int clip[TABLE_N_AXES][2];
1308 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
1309 xr_layout_cell (xr, cell, bb, clip, max_width, &h, NULL);
1312 xr_layout_cell (xr, cell, bb, clip, min_width, &h, NULL);
1315 *min_width += px_to_xr (cell->style->cell_style.margin[H][0]
1316 + cell->style->cell_style.margin[H][1]);
1318 *max_width += px_to_xr (cell->style->cell_style.margin[H][0]
1319 + cell->style->cell_style.margin[H][1]);
1323 xr_measure_cell_height (void *xr_, const struct table_cell *cell, int width)
1325 struct xr_driver *xr = xr_;
1326 int bb[TABLE_N_AXES][2];
1327 int clip[TABLE_N_AXES][2];
1331 bb[H][1] = width - px_to_xr (cell->style->cell_style.margin[H][0]
1332 + cell->style->cell_style.margin[H][1]);
1335 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
1336 xr_layout_cell (xr, cell, bb, clip, &w, &h, NULL);
1337 h += px_to_xr (cell->style->cell_style.margin[V][0]
1338 + cell->style->cell_style.margin[V][1]);
1342 static void xr_clip (struct xr_driver *, int clip[TABLE_N_AXES][2]);
1345 xr_draw_cell (void *xr_, const struct table_cell *cell, int color_idx,
1346 int bb[TABLE_N_AXES][2], int valign_offset,
1347 int spill[TABLE_N_AXES][2],
1348 int clip[TABLE_N_AXES][2])
1350 struct xr_driver *xr = xr_;
1353 if (!xr->transparent)
1355 cairo_save (xr->cairo);
1356 int bg_clip[TABLE_N_AXES][2];
1357 for (int axis = 0; axis < TABLE_N_AXES; axis++)
1359 bg_clip[axis][0] = clip[axis][0];
1360 if (bb[axis][0] == clip[axis][0])
1361 bg_clip[axis][0] -= spill[axis][0];
1363 bg_clip[axis][1] = clip[axis][1];
1364 if (bb[axis][1] == clip[axis][1])
1365 bg_clip[axis][1] += spill[axis][1];
1367 xr_clip (xr, bg_clip);
1368 set_source_rgba (xr->cairo, &cell->style->font_style.bg[color_idx]);
1370 bb[H][0] - spill[H][0],
1371 bb[V][0] - spill[V][0],
1372 bb[H][1] + spill[H][1],
1373 bb[V][1] + spill[V][1]);
1374 cairo_restore (xr->cairo);
1376 cairo_save (xr->cairo);
1377 if (!xr->systemcolors)
1378 set_source_rgba (xr->cairo, &cell->style->font_style.fg[color_idx]);
1380 bb[V][0] += valign_offset;
1382 for (int axis = 0; axis < TABLE_N_AXES; axis++)
1384 bb[axis][0] += px_to_xr (cell->style->cell_style.margin[axis][0]);
1385 bb[axis][1] -= px_to_xr (cell->style->cell_style.margin[axis][1]);
1387 if (bb[H][0] < bb[H][1] && bb[V][0] < bb[V][1])
1388 xr_layout_cell (xr, cell, bb, clip, &w, &h, &brk);
1389 cairo_restore (xr->cairo);
1393 xr_adjust_break (void *xr_, const struct table_cell *cell,
1394 int width, int height)
1396 struct xr_driver *xr = xr_;
1397 int bb[TABLE_N_AXES][2];
1398 int clip[TABLE_N_AXES][2];
1401 if (xr_measure_cell_height (xr_, cell, width) < height)
1405 bb[H][1] = width - px_to_xr (cell->style->cell_style.margin[H][0]
1406 + cell->style->cell_style.margin[H][1]);
1410 bb[V][1] = height - px_to_xr (cell->style->cell_style.margin[V][0]
1411 + cell->style->cell_style.margin[V][1]);
1412 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
1413 xr_layout_cell (xr, cell, bb, clip, &w, &h, &brk);
1418 xr_clip (struct xr_driver *xr, int clip[TABLE_N_AXES][2])
1420 if (clip[H][1] != INT_MAX || clip[V][1] != INT_MAX)
1422 double x0 = xr_to_pt (clip[H][0]);
1423 double y0 = xr_to_pt (clip[V][0] + xr->y);
1424 double x1 = xr_to_pt (clip[H][1]);
1425 double y1 = xr_to_pt (clip[V][1] + xr->y);
1427 cairo_rectangle (xr->cairo, x0, y0, x1 - x0, y1 - y0);
1428 cairo_clip (xr->cairo);
1433 add_attr (PangoAttrList *list, PangoAttribute *attr,
1434 guint start_index, guint end_index)
1436 attr->start_index = start_index;
1437 attr->end_index = end_index;
1438 pango_attr_list_insert (list, attr);
1442 markup_escape (struct string *out, unsigned int options,
1443 const char *in, size_t len)
1445 if (!(options & TAB_MARKUP))
1447 ds_put_substring (out, ss_buffer (in, len == -1 ? strlen (in) : len));
1459 ds_put_cstr (out, "&");
1462 ds_put_cstr (out, "<");
1465 ds_put_cstr (out, ">");
1468 ds_put_byte (out, c);
1475 get_layout_dimension (PangoLayout *layout, enum table_axis axis)
1477 int size[TABLE_N_AXES];
1478 pango_layout_get_size (layout, &size[H], &size[V]);
1483 xr_layout_cell_text (struct xr_driver *xr, const struct table_cell *cell,
1484 int bb[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
1485 int *widthp, int *brk)
1487 const struct font_style *font_style = &cell->style->font_style;
1488 const struct cell_style *cell_style = &cell->style->cell_style;
1489 unsigned int options = cell->options;
1491 enum table_axis X = options & TAB_ROTATE ? V : H;
1492 enum table_axis Y = !X;
1493 int R = options & TAB_ROTATE ? 0 : 1;
1495 struct xr_font *font = (options & TAB_FIX ? &xr->fonts[XR_FONT_FIXED]
1496 : &xr->fonts[XR_FONT_PROPORTIONAL]);
1497 struct xr_font local_font;
1498 if (font_style->typeface)
1500 PangoFontDescription *desc = parse_font (
1501 font_style->typeface,
1502 font_style->size ? font_style->size * 1000 * xr->font_scale : 10000,
1503 font_style->bold, font_style->italic);
1506 PangoLayout *layout = pango_cairo_create_layout (xr->cairo);
1507 pango_layout_set_font_description (layout, desc);
1509 local_font.desc = desc;
1510 local_font.layout = layout;
1515 const char *text = cell->text;
1516 enum table_halign halign = table_halign_interpret (
1517 cell_style->halign, cell->options & TAB_NUMERIC);
1518 if (cell_style->halign == TABLE_HALIGN_DECIMAL && !(options & TAB_ROTATE))
1520 int margin_adjustment = -px_to_xr (cell_style->decimal_offset);
1522 const char *decimal = strrchr (text, cell_style->decimal_char);
1525 pango_layout_set_text (font->layout, decimal, strlen (decimal));
1526 pango_layout_set_width (font->layout, -1);
1527 margin_adjustment += get_layout_dimension (font->layout, H);
1530 if (margin_adjustment < 0)
1531 bb[H][1] += margin_adjustment;
1534 struct string tmp = DS_EMPTY_INITIALIZER;
1535 PangoAttrList *attrs = NULL;
1537 /* Deal with an oddity of the Unicode line-breaking algorithm (or perhaps in
1538 Pango's implementation of it): it will break after a period or a comma
1539 that precedes a digit, e.g. in ".000" it will break after the period.
1540 This code looks for such a situation and inserts a U+2060 WORD JOINER
1541 to prevent the break.
1543 This isn't necessary when the decimal point is between two digits
1544 (e.g. "0.000" won't be broken) or when the display width is not limited so
1545 that word wrapping won't happen.
1547 It isn't necessary to look for more than one period or comma, as would
1548 happen with grouping like 1,234,567.89 or 1.234.567,89 because if groups
1549 are present then there will always be a digit on both sides of every
1550 period and comma. */
1551 if (options & TAB_MARKUP)
1553 PangoAttrList *new_attrs;
1555 if (pango_parse_markup (text, -1, 0, &new_attrs, &new_text, NULL, NULL))
1558 tmp.ss = ss_cstr (new_text);
1559 tmp.capacity = tmp.ss.length;
1563 /* XXX should we report the error? */
1564 ds_put_cstr (&tmp, text);
1567 else if (options & TAB_ROTATE || bb[H][1] != INT_MAX)
1569 const char *decimal = text + strcspn (text, ".,");
1571 && c_isdigit (decimal[1])
1572 && (decimal == text || !c_isdigit (decimal[-1])))
1574 ds_extend (&tmp, strlen (text) + 16);
1575 markup_escape (&tmp, options, text, decimal - text + 1);
1576 ds_put_unichar (&tmp, 0x2060 /* U+2060 WORD JOINER */);
1577 markup_escape (&tmp, options, decimal + 1, -1);
1581 if (font_style->underline)
1584 attrs = pango_attr_list_new ();
1585 pango_attr_list_insert (attrs, pango_attr_underline_new (
1586 PANGO_UNDERLINE_SINGLE));
1589 if (cell->n_footnotes || cell->n_subscripts || cell->superscript)
1591 /* If we haven't already put TEXT into tmp, do it now. */
1592 if (ds_is_empty (&tmp))
1594 ds_extend (&tmp, strlen (text) + 16);
1595 markup_escape (&tmp, options, text, -1);
1598 size_t subscript_ofs = ds_length (&tmp);
1599 for (size_t i = 0; i < cell->n_subscripts; i++)
1602 ds_put_byte (&tmp, ',');
1603 ds_put_cstr (&tmp, cell->subscripts[i]);
1606 size_t superscript_ofs = ds_length (&tmp);
1607 if (cell->superscript)
1608 ds_put_cstr (&tmp, cell->superscript);
1610 size_t footnote_ofs = ds_length (&tmp);
1611 for (size_t i = 0; i < cell->n_footnotes; i++)
1614 ds_put_byte (&tmp, ',');
1615 ds_put_cstr (&tmp, cell->footnotes[i]->marker);
1618 /* Allow footnote markers to occupy the right margin. That way, numbers
1619 in the column are still aligned. */
1620 if (cell->n_footnotes && halign == TABLE_HALIGN_RIGHT)
1622 /* Measure the width of the footnote marker, so we know how much we
1623 need to make room for. */
1624 pango_layout_set_text (font->layout, ds_cstr (&tmp) + footnote_ofs,
1625 ds_length (&tmp) - footnote_ofs);
1627 PangoAttrList *fn_attrs = pango_attr_list_new ();
1628 pango_attr_list_insert (
1629 fn_attrs, pango_attr_scale_new (PANGO_SCALE_SMALL));
1630 pango_attr_list_insert (fn_attrs, pango_attr_rise_new (3000));
1631 pango_layout_set_attributes (font->layout, fn_attrs);
1632 pango_attr_list_unref (fn_attrs);
1633 int footnote_width = get_layout_dimension (font->layout, X);
1635 /* Bound the adjustment by the width of the right margin. */
1636 int right_margin = px_to_xr (cell_style->margin[X][R]);
1637 int footnote_adjustment = MIN (footnote_width, right_margin);
1639 /* Adjust the bounding box. */
1640 if (options & TAB_ROTATE)
1641 footnote_adjustment = -footnote_adjustment;
1642 bb[X][R] += footnote_adjustment;
1645 pango_layout_set_attributes (font->layout, NULL);
1648 /* Set attributes. */
1650 attrs = pango_attr_list_new ();
1651 add_attr (attrs, pango_attr_font_desc_new (font->desc), subscript_ofs,
1652 PANGO_ATTR_INDEX_TO_TEXT_END);
1653 add_attr (attrs, pango_attr_scale_new (PANGO_SCALE_SMALL),
1654 subscript_ofs, PANGO_ATTR_INDEX_TO_TEXT_END);
1655 if (cell->n_subscripts)
1656 add_attr (attrs, pango_attr_rise_new (-3000), subscript_ofs,
1657 superscript_ofs - subscript_ofs);
1658 if (cell->superscript || cell->n_footnotes)
1659 add_attr (attrs, pango_attr_rise_new (3000), superscript_ofs,
1660 PANGO_ATTR_INDEX_TO_TEXT_END);
1663 /* Set the attributes, if any. */
1666 pango_layout_set_attributes (font->layout, attrs);
1667 pango_attr_list_unref (attrs);
1671 if (ds_is_empty (&tmp))
1672 pango_layout_set_text (font->layout, text, -1);
1674 pango_layout_set_text (font->layout, ds_cstr (&tmp), ds_length (&tmp));
1677 pango_layout_set_alignment (font->layout,
1678 (halign == TABLE_HALIGN_RIGHT ? PANGO_ALIGN_RIGHT
1679 : halign == TABLE_HALIGN_LEFT ? PANGO_ALIGN_LEFT
1680 : PANGO_ALIGN_CENTER));
1681 pango_layout_set_width (
1683 bb[X][1] == INT_MAX ? -1 : xr_to_pango (bb[X][1] - bb[X][0]));
1684 pango_layout_set_wrap (font->layout, PANGO_WRAP_WORD);
1686 if (clip[H][0] != clip[H][1])
1688 cairo_save (xr->cairo);
1689 if (!(options & TAB_ROTATE))
1691 if (options & TAB_ROTATE)
1693 cairo_translate (xr->cairo,
1694 xr_to_pt (bb[H][0]),
1695 xr_to_pt (bb[V][1] + xr->y));
1696 cairo_rotate (xr->cairo, -M_PI_2);
1699 cairo_translate (xr->cairo,
1700 xr_to_pt (bb[H][0]),
1701 xr_to_pt (bb[V][0] + xr->y));
1702 pango_cairo_show_layout (xr->cairo, font->layout);
1704 /* If enabled, this draws a blue rectangle around the extents of each
1705 line of text, which can be rather useful for debugging layout
1709 PangoLayoutIter *iter;
1710 iter = pango_layout_get_iter (font->layout);
1713 PangoRectangle extents;
1715 pango_layout_iter_get_line_extents (iter, &extents, NULL);
1716 cairo_save (xr->cairo);
1717 cairo_set_source_rgb (xr->cairo, 1, 0, 0);
1719 pango_to_xr (extents.x),
1720 pango_to_xr (extents.y) - xr->y,
1721 pango_to_xr (extents.x + extents.width),
1722 pango_to_xr (extents.y + extents.height) - xr->y);
1723 cairo_restore (xr->cairo);
1725 while (pango_layout_iter_next_line (iter));
1726 pango_layout_iter_free (iter);
1729 cairo_restore (xr->cairo);
1732 int size[TABLE_N_AXES];
1733 pango_layout_get_size (font->layout, &size[H], &size[V]);
1734 int w = pango_to_xr (size[X]);
1735 int h = pango_to_xr (size[Y]);
1738 if (bb[V][0] + h >= bb[V][1] && !(options & TAB_ROTATE))
1740 PangoLayoutIter *iter;
1743 /* Choose a breakpoint between lines instead of in the middle of one. */
1744 iter = pango_layout_get_iter (font->layout);
1747 PangoRectangle extents;
1751 pango_layout_iter_get_line_extents (iter, NULL, &extents);
1752 pango_layout_iter_get_line_yrange (iter, &y0, &y1);
1753 extents.x = pango_to_xr (extents.x);
1754 extents.y = pango_to_xr (y0);
1755 extents.width = pango_to_xr (extents.width);
1756 extents.height = pango_to_xr (y1 - y0);
1757 bottom = bb[V][0] + extents.y + extents.height;
1758 if (bottom < bb[V][1])
1760 if (brk && clip[H][0] != clip[H][1])
1768 while (pango_layout_iter_next_line (iter));
1769 pango_layout_iter_free (iter);
1771 /* If enabled, draws a green line across the chosen breakpoint, which can
1772 be useful for debugging issues with breaking. */
1776 dump_line (xr, -xr->left_margin, best,
1777 xr->width + xr->right_margin, best,
1779 &(struct cell_color) CELL_COLOR (0, 255, 0));
1783 pango_layout_set_attributes (font->layout, NULL);
1785 if (font == &local_font)
1787 g_object_unref (G_OBJECT (font->layout));
1788 pango_font_description_free (font->desc);
1795 xr_layout_cell (struct xr_driver *xr, const struct table_cell *cell,
1796 int bb[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
1797 int *width, int *height, int *brk)
1802 /* If enabled, draws a blue rectangle around the cell extents, which can be
1803 useful for debugging layout. */
1806 if (clip[H][0] != clip[H][1])
1808 cairo_save (xr->cairo);
1809 cairo_set_source_rgb (xr->cairo, 0, 0, 1);
1810 dump_rectangle (xr, bb[H][0], bb[V][0], bb[H][1], bb[V][1]);
1811 cairo_restore (xr->cairo);
1817 *height = xr_layout_cell_text (xr, cell, bb, clip, width, brk);
1820 struct output_driver_factory pdf_driver_factory =
1821 { "pdf", "pspp.pdf", xr_pdf_create };
1822 struct output_driver_factory ps_driver_factory =
1823 { "ps", "pspp.ps", xr_ps_create };
1824 struct output_driver_factory svg_driver_factory =
1825 { "svg", "pspp.svg", xr_svg_create };
1827 static const struct output_driver_class cairo_driver_class =
1835 /* GUI rendering helpers. */
1839 struct output_item *item;
1842 struct render_pager *p;
1843 struct xr_driver *xr;
1846 #define CHART_WIDTH 500
1847 #define CHART_HEIGHT 375
1852 xr_driver_create (cairo_t *cairo, struct string_map *options)
1854 struct xr_driver *xr = xr_allocate ("cairo", 0, options, 1.0);
1855 xr_set_cairo (xr, cairo);
1859 /* Destroy XR, which should have been created with xr_driver_create(). Any
1860 cairo_t added to XR is not destroyed, because it is owned by the client. */
1862 xr_driver_destroy (struct xr_driver *xr)
1867 output_driver_destroy (&xr->driver);
1871 static struct xr_rendering *
1872 xr_rendering_create_text (struct xr_driver *xr, const char *text, cairo_t *cr)
1874 struct table_item *table_item;
1875 struct xr_rendering *r;
1877 table_item = table_item_create (table_from_string (text), NULL, NULL);
1878 r = xr_rendering_create (xr, &table_item->output_item, cr);
1879 table_item_unref (table_item);
1885 xr_rendering_apply_options (struct xr_rendering *xr, struct string_map *o)
1887 if (is_table_item (xr->item))
1888 apply_options (xr->xr, o);
1891 struct xr_rendering *
1892 xr_rendering_create (struct xr_driver *xr, const struct output_item *item,
1895 struct xr_rendering *r = NULL;
1897 if (is_text_item (item))
1898 r = xr_rendering_create_text (xr, text_item_get_text (to_text_item (item)),
1900 else if (is_message_item (item))
1902 const struct message_item *message_item = to_message_item (item);
1903 char *s = msg_to_string (message_item_get_msg (message_item));
1904 r = xr_rendering_create_text (xr, s, cr);
1907 else if (is_table_item (item))
1909 r = xzalloc (sizeof *r);
1910 r->item = output_item_ref (item);
1912 xr_set_cairo (xr, cr);
1913 r->p = render_pager_create (xr->params, to_table_item (item));
1915 else if (is_chart_item (item))
1917 r = xzalloc (sizeof *r);
1918 r->item = output_item_ref (item);
1920 else if (is_group_open_item (item))
1921 r = xr_rendering_create_text (xr, to_group_open_item (item)->command_name,
1928 xr_rendering_destroy (struct xr_rendering *r)
1932 output_item_unref (r->item);
1933 render_pager_destroy (r->p);
1939 xr_rendering_measure (const struct xr_rendering *r, int *wp, int *hp)
1943 if (is_table_item (r->item))
1945 w = render_pager_get_size (r->p, H) / XR_POINT;
1946 h = render_pager_get_size (r->p, V) / XR_POINT;
1960 static void xr_draw_chart (const struct chart_item *, cairo_t *,
1961 double x, double y, double width, double height);
1965 xr_rendering_draw (struct xr_rendering *r, cairo_t *cr,
1966 int x0, int y0, int x1, int y1)
1968 if (is_table_item (r->item))
1970 struct xr_driver *xr = r->xr;
1972 xr_set_cairo (xr, cr);
1974 render_pager_draw_region (r->p, x0 * XR_POINT, y0 * XR_POINT,
1975 (x1 - x0) * XR_POINT, (y1 - y0) * XR_POINT);
1978 xr_draw_chart (to_chart_item (r->item), cr,
1979 0, 0, CHART_WIDTH, CHART_HEIGHT);
1983 xr_draw_chart (const struct chart_item *chart_item, cairo_t *cr,
1984 double x, double y, double width, double height)
1986 struct xrchart_geometry geom;
1989 cairo_translate (cr, x, y + height);
1990 cairo_scale (cr, 1.0, -1.0);
1991 xrchart_geometry_init (cr, &geom, width, height);
1992 if (is_boxplot (chart_item))
1993 xrchart_draw_boxplot (chart_item, cr, &geom);
1994 else if (is_histogram_chart (chart_item))
1995 xrchart_draw_histogram (chart_item, cr, &geom);
1996 else if (is_np_plot_chart (chart_item))
1997 xrchart_draw_np_plot (chart_item, cr, &geom);
1998 else if (is_piechart (chart_item))
1999 xrchart_draw_piechart (chart_item, cr, &geom);
2000 else if (is_barchart (chart_item))
2001 xrchart_draw_barchart (chart_item, cr, &geom);
2002 else if (is_roc_chart (chart_item))
2003 xrchart_draw_roc (chart_item, cr, &geom);
2004 else if (is_scree (chart_item))
2005 xrchart_draw_scree (chart_item, cr, &geom);
2006 else if (is_spreadlevel_plot_chart (chart_item))
2007 xrchart_draw_spreadlevel (chart_item, cr, &geom);
2008 else if (is_scatterplot_chart (chart_item))
2009 xrchart_draw_scatterplot (chart_item, cr, &geom);
2012 xrchart_geometry_free (cr, &geom);
2018 xr_draw_png_chart (const struct chart_item *item,
2019 const char *file_name_template, int number,
2020 const struct cell_color *fg,
2021 const struct cell_color *bg)
2023 const int width = 640;
2024 const int length = 480;
2026 cairo_surface_t *surface;
2027 cairo_status_t status;
2028 const char *number_pos;
2032 number_pos = strchr (file_name_template, '#');
2033 if (number_pos != NULL)
2034 file_name = xasprintf ("%.*s%d%s.png", (int) (number_pos - file_name_template),
2035 file_name_template, number, number_pos + 1);
2037 file_name = xasprintf ("%s.png", file_name_template);
2039 surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, length);
2040 cr = cairo_create (surface);
2042 cairo_set_source_rgb (cr, bg->r / 255.0, bg->g / 255.0, bg->b / 255.0);
2045 cairo_set_source_rgb (cr, fg->r / 255.0, fg->g / 255.0, fg->b / 255.0);
2047 xr_draw_chart (item, cr, 0.0, 0.0, width, length);
2049 status = cairo_surface_write_to_png (surface, file_name);
2050 if (status != CAIRO_STATUS_SUCCESS)
2051 msg (ME, _("error writing output file `%s': %s"),
2052 file_name, cairo_status_to_string (status));
2055 cairo_surface_destroy (surface);
2062 xr_draw_eps_chart (const struct chart_item *item,
2063 const char *file_name_template, int number,
2064 const struct cell_color *fg,
2065 const struct cell_color *bg)
2067 const int width = 640;
2068 const int length = 480;
2070 cairo_surface_t *surface;
2071 const char *number_pos;
2075 number_pos = strchr (file_name_template, '#');
2076 if (number_pos != NULL)
2077 file_name = xasprintf ("%.*s%d%s.eps", (int) (number_pos - file_name_template),
2078 file_name_template, number, number_pos + 1);
2080 file_name = xasprintf ("%s.eps", file_name_template);
2082 surface = cairo_ps_surface_create (file_name, width, length);
2083 cairo_ps_surface_set_eps (surface, true);
2084 cr = cairo_create (surface);
2086 cairo_set_source_rgb (cr, bg->r / 255.0, bg->g / 255.0, bg->b / 255.0);
2089 cairo_set_source_rgb (cr, fg->r / 255.0, fg->g / 255.0, fg->b / 255.0);
2091 xr_draw_chart (item, cr, 0.0, 0.0, width, length);
2094 cairo_surface_destroy (surface);
2101 struct xr_table_state
2103 struct xr_render_fsm fsm;
2104 struct render_pager *p;
2108 xr_table_render (struct xr_render_fsm *fsm, struct xr_driver *xr)
2110 struct xr_table_state *ts = UP_CAST (fsm, struct xr_table_state, fsm);
2112 while (render_pager_has_next (ts->p))
2116 used = render_pager_draw_next (ts->p, xr->length - xr->y);
2129 xr_table_destroy (struct xr_render_fsm *fsm)
2131 struct xr_table_state *ts = UP_CAST (fsm, struct xr_table_state, fsm);
2133 render_pager_destroy (ts->p);
2137 static struct xr_render_fsm *
2138 xr_render_table (struct xr_driver *xr, struct table_item *table_item)
2140 struct xr_table_state *ts;
2142 ts = xmalloc (sizeof *ts);
2143 ts->fsm.render = xr_table_render;
2144 ts->fsm.destroy = xr_table_destroy;
2147 xr->y += xr->char_height;
2149 ts->p = render_pager_create (xr->params, table_item);
2150 table_item_unref (table_item);
2155 struct xr_chart_state
2157 struct xr_render_fsm fsm;
2158 struct chart_item *chart_item;
2162 xr_chart_render (struct xr_render_fsm *fsm, struct xr_driver *xr)
2164 struct xr_chart_state *cs = UP_CAST (fsm, struct xr_chart_state, fsm);
2166 const int chart_height = 0.8 * (xr->length < xr->width ? xr->length : xr->width);
2168 if (xr->y > xr->length - chart_height)
2171 if (xr->cairo != NULL)
2173 xr_draw_chart (cs->chart_item, xr->cairo,
2176 xr_to_pt (xr->width),
2177 xr_to_pt (chart_height));
2179 xr->y += chart_height;
2185 xr_chart_destroy (struct xr_render_fsm *fsm)
2187 struct xr_chart_state *cs = UP_CAST (fsm, struct xr_chart_state, fsm);
2189 chart_item_unref (cs->chart_item);
2193 static struct xr_render_fsm *
2194 xr_render_chart (const struct chart_item *chart_item)
2196 struct xr_chart_state *cs;
2198 cs = xmalloc (sizeof *cs);
2199 cs->fsm.render = xr_chart_render;
2200 cs->fsm.destroy = xr_chart_destroy;
2201 cs->chart_item = chart_item_ref (chart_item);
2207 xr_eject_render (struct xr_render_fsm *fsm UNUSED, struct xr_driver *xr)
2213 xr_eject_destroy (struct xr_render_fsm *fsm UNUSED)
2215 /* Nothing to do. */
2218 static struct xr_render_fsm *
2219 xr_render_eject (void)
2221 static struct xr_render_fsm eject_renderer =
2227 return &eject_renderer;
2230 static struct xr_render_fsm *
2231 xr_render_text (struct xr_driver *xr, const struct text_item *text_item)
2233 enum text_item_type type = text_item_get_type (text_item);
2237 case TEXT_ITEM_PAGE_TITLE:
2240 case TEXT_ITEM_EJECT_PAGE:
2242 return xr_render_eject ();
2246 return xr_render_table (
2247 xr, text_item_to_table_item (text_item_ref (text_item)));
2253 static struct xr_render_fsm *
2254 xr_render_message (struct xr_driver *xr,
2255 const struct message_item *message_item)
2257 char *s = msg_to_string (message_item_get_msg (message_item));
2258 struct text_item *item = text_item_create (TEXT_ITEM_LOG, s);
2260 return xr_render_table (xr, text_item_to_table_item (item));
2263 static struct xr_render_fsm *
2264 xr_render_output_item (struct xr_driver *xr,
2265 const struct output_item *output_item)
2267 if (is_table_item (output_item))
2268 return xr_render_table (xr, table_item_ref (to_table_item (output_item)));
2269 else if (is_chart_item (output_item))
2270 return xr_render_chart (to_chart_item (output_item));
2271 else if (is_text_item (output_item))
2272 return xr_render_text (xr, to_text_item (output_item));
2273 else if (is_message_item (output_item))
2274 return xr_render_message (xr, to_message_item (output_item));
2280 xr_draw_svg_file (struct xr_rendering *r,
2281 const char *filename)
2285 xr_rendering_measure (r, &width, &height);
2286 cairo_surface_t *surface = cairo_svg_surface_create (filename, width, height);
2289 g_error ("Could not create cairo svg surface with file %s", filename);
2292 cairo_t *cr = cairo_create (surface);
2293 xr_rendering_draw (r, cr, 0, 0, width, height);
2295 cairo_surface_destroy (surface);