1 /* PSPP - a program for statistical analysis.
2 Copyright (C) 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation, either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
19 #include "output/cairo.h"
21 #include "libpspp/assertion.h"
22 #include "libpspp/cast.h"
23 #include "libpspp/message.h"
24 #include "libpspp/pool.h"
25 #include "libpspp/start-date.h"
26 #include "libpspp/str.h"
27 #include "libpspp/string-map.h"
28 #include "libpspp/version.h"
29 #include "data/file-handle-def.h"
30 #include "output/cairo-chart.h"
31 #include "output/chart-item-provider.h"
32 #include "output/charts/boxplot.h"
33 #include "output/charts/np-plot.h"
34 #include "output/charts/piechart.h"
35 #include "output/charts/barchart.h"
36 #include "output/charts/plot-hist.h"
37 #include "output/charts/roc-chart.h"
38 #include "output/charts/spreadlevel-plot.h"
39 #include "output/charts/scree.h"
40 #include "output/charts/scatterplot.h"
41 #include "output/driver-provider.h"
42 #include "output/group-item.h"
43 #include "output/message-item.h"
44 #include "output/options.h"
45 #include "output/render.h"
46 #include "output/tab.h"
47 #include "output/table-item.h"
48 #include "output/table.h"
49 #include "output/text-item.h"
51 #include <cairo/cairo-pdf.h>
52 #include <cairo/cairo-ps.h>
53 #include <cairo/cairo-svg.h>
54 #include <cairo/cairo.h>
56 #include <pango/pango-font.h>
57 #include <pango/pango-layout.h>
58 #include <pango/pango.h>
59 #include <pango/pangocairo.h>
62 #include "gl/c-ctype.h"
63 #include "gl/c-strcase.h"
64 #include "gl/intprops.h"
65 #include "gl/minmax.h"
66 #include "gl/xalloc.h"
69 #define _(msgid) gettext (msgid)
71 /* This file uses TABLE_HORZ and TABLE_VERT enough to warrant abbreviating. */
75 /* The unit used for internal measurements is inch/(72 * XR_POINT).
76 (Thus, XR_POINT units represent one point.) */
77 #define XR_POINT PANGO_SCALE
79 /* Conversions to and from points. */
83 return x / (double) XR_POINT;
86 /* Conversion from 1/96" units ("pixels") to Cairo/Pango units. */
90 return x * (PANGO_SCALE * 72 / 96);
93 /* Dimensions for drawing lines in tables. */
94 #define XR_LINE_WIDTH (XR_POINT / 2) /* Width of an ordinary line. */
95 #define XR_LINE_SPACE XR_POINT /* Space between double lines. */
108 XR_FONT_PROPORTIONAL,
114 /* A font for use with Cairo. */
117 PangoFontDescription *desc;
121 /* An output item whose rendering is in progress. */
124 /* Renders as much of itself as it can on the current page. Returns true
125 if rendering is complete, false if the output item needs another
127 bool (*render) (struct xr_render_fsm *, struct xr_driver *);
129 /* Destroys the output item. */
130 void (*destroy) (struct xr_render_fsm *);
133 /* Cairo output driver. */
136 struct output_driver driver;
138 /* User parameters. */
139 struct xr_font fonts[XR_N_FONTS];
141 int width; /* Page width minus margins. */
142 int length; /* Page length minus margins and header. */
144 int left_margin; /* Left margin in inch/(72 * XR_POINT). */
145 int right_margin; /* Right margin in inch/(72 * XR_POINT). */
146 int top_margin; /* Top margin in inch/(72 * XR_POINT). */
147 int bottom_margin; /* Bottom margin in inch/(72 * XR_POINT). */
149 int line_space; /* Space between lines. */
150 int line_width; /* Width of lines. */
152 int min_break[TABLE_N_AXES]; /* Min cell size to break across pages. */
154 struct xr_color bg; /* Background color */
155 struct xr_color fg; /* Foreground color */
157 /* Internal state. */
158 struct render_params *params;
159 int char_width, char_height;
164 int page_number; /* Current page number. */
166 struct xr_render_fsm *fsm;
170 static const struct output_driver_class cairo_driver_class;
172 static void xr_driver_destroy_fsm (struct xr_driver *);
173 static void xr_driver_run_fsm (struct xr_driver *);
175 static void xr_draw_line (void *, int bb[TABLE_N_AXES][2],
176 enum render_line_style styles[TABLE_N_AXES][2],
177 struct cell_color colors[TABLE_N_AXES][2]);
178 static void xr_measure_cell_width (void *, const struct table_cell *,
180 static int xr_measure_cell_height (void *, const struct table_cell *,
182 static void xr_draw_cell (void *, const struct table_cell *, int color_idx,
183 int bb[TABLE_N_AXES][2],
184 int spill[TABLE_N_AXES][2],
185 int clip[TABLE_N_AXES][2]);
186 static int xr_adjust_break (void *, const struct table_cell *,
187 int width, int height);
189 static struct xr_render_fsm *xr_render_output_item (
190 struct xr_driver *, const struct output_item *);
192 /* Output driver basics. */
194 static struct xr_driver *
195 xr_driver_cast (struct output_driver *driver)
197 assert (driver->class == &cairo_driver_class);
198 return UP_CAST (driver, struct xr_driver, driver);
201 static struct driver_option *
202 opt (struct output_driver *d, struct string_map *options, const char *key,
203 const char *default_value)
205 return driver_option_get (d, options, key, default_value);
208 /* Parse color information specified by KEY into {RED,GREEN,BLUE}.
209 Currently, the input string must be of the form "#RRRRGGGGBBBB"
210 Future implementations might allow things like "yellow" and
211 "sky-blue-ultra-brown"
214 parse_color (struct output_driver *d, struct string_map *options,
215 const char *key, const char *default_value,
216 struct xr_color *color)
218 int red, green, blue;
219 char *string = parse_string (opt (d, options, key, default_value));
221 if (3 != sscanf (string, "#%04x%04x%04x", &red, &green, &blue))
223 /* If the parsed option string fails, then try the default value */
224 if ( 3 != sscanf (default_value, "#%04x%04x%04x", &red, &green, &blue))
226 /* ... and if that fails set everything to zero */
227 red = green = blue = 0;
233 /* Convert 16 bit ints to float */
234 color->red = red / (double) 0xFFFF;
235 color->green = green / (double) 0xFFFF;
236 color->blue = blue / (double) 0xFFFF;
239 static PangoFontDescription *
240 parse_font (const char *font, int default_size, bool bold, bool italic)
242 if (!c_strcasecmp (font, "Monospaced"))
245 PangoFontDescription *desc = pango_font_description_from_string (font);
249 /* If the font description didn't include an explicit font size, then set it
250 to DEFAULT_SIZE, which is in inch/72000 units. */
251 if (!(pango_font_description_get_set_fields (desc) & PANGO_FONT_MASK_SIZE))
252 pango_font_description_set_size (desc,
253 (default_size / 1000.0) * PANGO_SCALE);
255 pango_font_description_set_weight (desc, (bold
257 : PANGO_WEIGHT_NORMAL));
258 pango_font_description_set_style (desc, (italic
260 : PANGO_STYLE_NORMAL));
265 static PangoFontDescription *
266 parse_font_option (struct output_driver *d, struct string_map *options,
267 const char *key, const char *default_value,
268 int default_size, bool bold, bool italic)
270 char *string = parse_string (opt (d, options, key, default_value));
271 PangoFontDescription *desc = parse_font (string, default_size, bold, italic);
274 msg (MW, _("`%s': bad font specification"), string);
276 /* Fall back to DEFAULT_VALUE, which had better be a valid font
278 desc = parse_font (default_value, default_size, bold, italic);
279 assert (desc != NULL);
287 apply_options (struct xr_driver *xr, struct string_map *o)
289 struct output_driver *d = &xr->driver;
291 /* In inch/72000 units used by parse_paper_size() and parse_dimension(). */
292 int left_margin, right_margin;
293 int top_margin, bottom_margin;
294 int paper_width, paper_length;
296 int min_break[TABLE_N_AXES];
298 /* Scale factor from inch/72000 to inch/(72 * XR_POINT). */
299 const double scale = XR_POINT / 1000.;
303 for (i = 0; i < XR_N_FONTS; i++)
305 struct xr_font *font = &xr->fonts[i];
307 if (font->desc != NULL)
308 pango_font_description_free (font->desc);
311 font_size = parse_int (opt (d, o, "font-size", "10000"), 1000, 1000000);
312 xr->fonts[XR_FONT_FIXED].desc = parse_font_option
313 (d, o, "fixed-font", "monospace", font_size, false, false);
314 xr->fonts[XR_FONT_PROPORTIONAL].desc = parse_font_option (
315 d, o, "prop-font", "sans serif", font_size, false, false);
316 xr->fonts[XR_FONT_EMPHASIS].desc = parse_font_option (
317 d, o, "emph-font", "sans serif", font_size, false, true);
321 parse_color (d, o, "background-color", "#FFFFFFFFFFFF", &xr->bg);
322 parse_color (d, o, "foreground-color", "#000000000000", &xr->fg);
324 /* Get dimensions. */
325 parse_paper_size (opt (d, o, "paper-size", ""), &paper_width, &paper_length);
326 left_margin = parse_dimension (opt (d, o, "left-margin", ".5in"));
327 right_margin = parse_dimension (opt (d, o, "right-margin", ".5in"));
328 top_margin = parse_dimension (opt (d, o, "top-margin", ".5in"));
329 bottom_margin = parse_dimension (opt (d, o, "bottom-margin", ".5in"));
331 min_break[H] = parse_dimension (opt (d, o, "min-hbreak", NULL)) * scale;
332 min_break[V] = parse_dimension (opt (d, o, "min-vbreak", NULL)) * scale;
334 /* Convert to inch/(XR_POINT * 72). */
335 xr->left_margin = left_margin * scale;
336 xr->right_margin = right_margin * scale;
337 xr->top_margin = top_margin * scale;
338 xr->bottom_margin = bottom_margin * scale;
339 xr->width = (paper_width - left_margin - right_margin) * scale;
340 xr->length = (paper_length - top_margin - bottom_margin) * scale;
341 xr->min_break[H] = min_break[H] >= 0 ? min_break[H] : xr->width / 2;
342 xr->min_break[V] = min_break[V] >= 0 ? min_break[V] : xr->length / 2;
345 static struct xr_driver *
346 xr_allocate (const char *name, int device_type, struct string_map *o)
348 struct xr_driver *xr = xzalloc (sizeof *xr);
349 struct output_driver *d = &xr->driver;
351 output_driver_init (d, &cairo_driver_class, name, device_type);
353 apply_options (xr, o);
359 pango_to_xr (int pango)
361 return (XR_POINT != PANGO_SCALE
362 ? ceil (pango * (1. * XR_POINT / PANGO_SCALE))
369 return (XR_POINT != PANGO_SCALE
370 ? ceil (xr * (1. / XR_POINT * PANGO_SCALE))
375 xr_set_cairo (struct xr_driver *xr, cairo_t *cairo)
381 cairo_set_line_width (xr->cairo, xr_to_pt (XR_LINE_WIDTH));
385 for (i = 0; i < XR_N_FONTS; i++)
387 struct xr_font *font = &xr->fonts[i];
388 int char_width, char_height;
390 font->layout = pango_cairo_create_layout (cairo);
391 pango_layout_set_font_description (font->layout, font->desc);
393 pango_layout_set_text (font->layout, "0", 1);
394 pango_layout_get_size (font->layout, &char_width, &char_height);
395 xr->char_width = MAX (xr->char_width, pango_to_xr (char_width));
396 xr->char_height = MAX (xr->char_height, pango_to_xr (char_height));
399 if (xr->params == NULL)
401 xr->params = xmalloc (sizeof *xr->params);
402 xr->params->draw_line = xr_draw_line;
403 xr->params->measure_cell_width = xr_measure_cell_width;
404 xr->params->measure_cell_height = xr_measure_cell_height;
405 xr->params->adjust_break = xr_adjust_break;
406 xr->params->draw_cell = xr_draw_cell;
407 xr->params->aux = xr;
408 xr->params->size[H] = xr->width;
409 xr->params->size[V] = xr->length;
410 xr->params->font_size[H] = xr->char_width;
411 xr->params->font_size[V] = xr->char_height;
413 int lw = XR_LINE_WIDTH;
414 int ls = XR_LINE_SPACE;
415 for (i = 0; i < TABLE_N_AXES; i++)
417 xr->params->line_widths[i][RENDER_LINE_NONE] = 0;
418 xr->params->line_widths[i][RENDER_LINE_SINGLE] = lw;
419 xr->params->line_widths[i][RENDER_LINE_DASHED] = lw;
420 xr->params->line_widths[i][RENDER_LINE_THICK] = lw * 2;
421 xr->params->line_widths[i][RENDER_LINE_THIN] = lw / 2;
422 xr->params->line_widths[i][RENDER_LINE_DOUBLE] = 2 * lw + ls;
425 for (i = 0; i < TABLE_N_AXES; i++)
426 xr->params->min_break[i] = xr->min_break[i];
427 xr->params->supports_margins = true;
428 xr->params->rtl = render_direction_rtl ();
431 cairo_set_source_rgb (xr->cairo, xr->fg.red, xr->fg.green, xr->fg.blue);
436 static struct output_driver *
437 xr_create (const char *file_name, enum settings_output_devices device_type,
438 struct string_map *o, enum xr_output_type file_type)
440 enum { MIN_WIDTH = 3, MIN_LENGTH = 3 };
441 struct xr_driver *xr;
442 cairo_surface_t *surface;
443 cairo_status_t status;
444 double width_pt, length_pt;
446 xr = xr_allocate (file_name, device_type, o);
448 width_pt = xr_to_pt (xr->width + xr->left_margin + xr->right_margin);
449 length_pt = xr_to_pt (xr->length + xr->top_margin + xr->bottom_margin);
450 if (file_type == XR_PDF)
451 surface = cairo_pdf_surface_create (file_name, width_pt, length_pt);
452 else if (file_type == XR_PS)
453 surface = cairo_ps_surface_create (file_name, width_pt, length_pt);
454 else if (file_type == XR_SVG)
455 surface = cairo_svg_surface_create (file_name, width_pt, length_pt);
459 status = cairo_surface_status (surface);
460 if (status != CAIRO_STATUS_SUCCESS)
462 msg (ME, _("error opening output file `%s': %s"),
463 file_name, cairo_status_to_string (status));
464 cairo_surface_destroy (surface);
468 xr->cairo = cairo_create (surface);
469 cairo_surface_destroy (surface);
471 if (!xr_set_cairo (xr, xr->cairo))
474 cairo_save (xr->cairo);
475 xr_driver_next_page (xr, xr->cairo);
477 if (xr->width / xr->char_width < MIN_WIDTH)
479 msg (ME, _("The defined page is not wide enough to hold at least %d "
480 "characters in the default font. In fact, there's only "
481 "room for %d characters."),
483 xr->width / xr->char_width);
487 if (xr->length / xr->char_height < MIN_LENGTH)
489 msg (ME, _("The defined page is not long enough to hold at least %d "
490 "lines in the default font. In fact, there's only "
491 "room for %d lines."),
493 xr->length / xr->char_height);
500 output_driver_destroy (&xr->driver);
504 static struct output_driver *
505 xr_pdf_create (struct file_handle *fh, enum settings_output_devices device_type,
506 struct string_map *o)
508 struct output_driver *od = xr_create (fh_get_file_name (fh), device_type, o, XR_PDF);
513 static struct output_driver *
514 xr_ps_create (struct file_handle *fh, enum settings_output_devices device_type,
515 struct string_map *o)
517 struct output_driver *od = xr_create (fh_get_file_name (fh), device_type, o, XR_PS);
522 static struct output_driver *
523 xr_svg_create (struct file_handle *fh, enum settings_output_devices device_type,
524 struct string_map *o)
526 struct output_driver *od = xr_create (fh_get_file_name (fh), device_type, o, XR_SVG);
532 xr_destroy (struct output_driver *driver)
534 struct xr_driver *xr = xr_driver_cast (driver);
537 xr_driver_destroy_fsm (xr);
539 if (xr->cairo != NULL)
541 cairo_status_t status;
543 cairo_surface_finish (cairo_get_target (xr->cairo));
544 status = cairo_status (xr->cairo);
545 if (status != CAIRO_STATUS_SUCCESS)
546 msg (ME, _("error drawing output for %s driver: %s"),
547 output_driver_get_name (driver),
548 cairo_status_to_string (status));
549 cairo_destroy (xr->cairo);
552 for (i = 0; i < XR_N_FONTS; i++)
554 struct xr_font *font = &xr->fonts[i];
556 if (font->desc != NULL)
557 pango_font_description_free (font->desc);
558 if (font->layout != NULL)
559 g_object_unref (font->layout);
567 xr_flush (struct output_driver *driver)
569 struct xr_driver *xr = xr_driver_cast (driver);
571 cairo_surface_flush (cairo_get_target (xr->cairo));
575 xr_submit (struct output_driver *driver, const struct output_item *output_item)
577 struct xr_driver *xr = xr_driver_cast (driver);
579 xr_driver_output_item (xr, output_item);
580 while (xr_driver_need_new_page (xr))
582 cairo_restore (xr->cairo);
583 cairo_show_page (xr->cairo);
584 cairo_save (xr->cairo);
585 xr_driver_next_page (xr, xr->cairo);
589 /* Functions for rendering a series of output items to a series of Cairo
590 contexts, with pagination.
592 Used by PSPPIRE for printing, and by the basic Cairo output driver above as
593 its underlying implementation.
595 See the big comment in cairo.h for intended usage. */
597 /* Gives new page CAIRO to XR for output. */
599 xr_driver_next_page (struct xr_driver *xr, cairo_t *cairo)
602 cairo_set_source_rgb (cairo, xr->bg.red, xr->bg.green, xr->bg.blue);
603 cairo_rectangle (cairo, 0, 0, xr->width, xr->length);
605 cairo_restore (cairo);
607 cairo_translate (cairo,
608 xr_to_pt (xr->left_margin),
609 xr_to_pt (xr->top_margin));
614 xr_driver_run_fsm (xr);
617 /* Start rendering OUTPUT_ITEM to XR. Only valid if XR is not in the middle of
618 rendering a previous output item, that is, only if xr_driver_need_new_page()
621 xr_driver_output_item (struct xr_driver *xr,
622 const struct output_item *output_item)
624 assert (xr->fsm == NULL);
625 xr->fsm = xr_render_output_item (xr, output_item);
626 xr_driver_run_fsm (xr);
629 /* Returns true if XR is in the middle of rendering an output item and needs a
630 new page to be appended using xr_driver_next_page() to make progress,
633 xr_driver_need_new_page (const struct xr_driver *xr)
635 return xr->fsm != NULL;
638 /* Returns true if the current page doesn't have any content yet. */
640 xr_driver_is_page_blank (const struct xr_driver *xr)
646 xr_driver_destroy_fsm (struct xr_driver *xr)
650 xr->fsm->destroy (xr->fsm);
656 xr_driver_run_fsm (struct xr_driver *xr)
658 if (xr->fsm != NULL && !xr->fsm->render (xr->fsm, xr))
659 xr_driver_destroy_fsm (xr);
663 xr_layout_cell (struct xr_driver *, const struct table_cell *,
664 int bb[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
665 int *width, int *height, int *brk);
668 dump_line (struct xr_driver *xr, int x0, int y0, int x1, int y1, int style,
669 const struct cell_color *color)
671 cairo_new_path (xr->cairo);
672 cairo_set_source_rgb (xr->cairo,
673 color->r / 255.0, color->g / 255.0, color->b / 255.0);
674 cairo_set_line_width (
676 xr_to_pt (style == RENDER_LINE_THICK ? XR_LINE_WIDTH * 2
677 : style == RENDER_LINE_THIN ? XR_LINE_WIDTH / 2
679 cairo_move_to (xr->cairo, xr_to_pt (x0 + xr->x), xr_to_pt (y0 + xr->y));
680 cairo_line_to (xr->cairo, xr_to_pt (x1 + xr->x), xr_to_pt (y1 + xr->y));
681 cairo_stroke (xr->cairo);
685 dump_rectangle (struct xr_driver *xr, int x0, int y0, int x1, int y1)
687 cairo_new_path (xr->cairo);
688 cairo_set_line_width (xr->cairo, xr_to_pt (XR_LINE_WIDTH));
689 cairo_move_to (xr->cairo, xr_to_pt (x0 + xr->x), xr_to_pt (y0 + xr->y));
690 cairo_line_to (xr->cairo, xr_to_pt (x1 + xr->x), xr_to_pt (y0 + xr->y));
691 cairo_line_to (xr->cairo, xr_to_pt (x1 + xr->x), xr_to_pt (y1 + xr->y));
692 cairo_line_to (xr->cairo, xr_to_pt (x0 + xr->x), xr_to_pt (y1 + xr->y));
693 cairo_close_path (xr->cairo);
694 cairo_stroke (xr->cairo);
698 fill_rectangle (struct xr_driver *xr, int x0, int y0, int x1, int y1)
700 cairo_new_path (xr->cairo);
701 cairo_set_line_width (xr->cairo, xr_to_pt (XR_LINE_WIDTH));
702 cairo_rectangle (xr->cairo,
703 xr_to_pt (x0 + xr->x), xr_to_pt (y0 + xr->y),
704 xr_to_pt (x1 - x0), xr_to_pt (y1 - y0));
705 cairo_fill (xr->cairo);
708 /* Draws a horizontal line X0...X2 at Y if LEFT says so,
709 shortening it to X0...X1 if SHORTEN is true.
710 Draws a horizontal line X1...X3 at Y if RIGHT says so,
711 shortening it to X2...X3 if SHORTEN is true. */
713 horz_line (struct xr_driver *xr, int x0, int x1, int x2, int x3, int y,
714 enum render_line_style left, enum render_line_style right,
715 const struct cell_color *left_color,
716 const struct cell_color *right_color,
719 if (left != RENDER_LINE_NONE && right != RENDER_LINE_NONE && !shorten
720 && cell_color_equal (left_color, right_color))
721 dump_line (xr, x0, y, x3, y, left, left_color);
724 if (left != RENDER_LINE_NONE)
725 dump_line (xr, x0, y, shorten ? x1 : x2, y, left, left_color);
726 if (right != RENDER_LINE_NONE)
727 dump_line (xr, shorten ? x2 : x1, y, x3, y, right, right_color);
731 /* Draws a vertical line Y0...Y2 at X if TOP says so,
732 shortening it to Y0...Y1 if SHORTEN is true.
733 Draws a vertical line Y1...Y3 at X if BOTTOM says so,
734 shortening it to Y2...Y3 if SHORTEN is true. */
736 vert_line (struct xr_driver *xr, int y0, int y1, int y2, int y3, int x,
737 enum render_line_style top, enum render_line_style bottom,
738 const struct cell_color *top_color,
739 const struct cell_color *bottom_color,
742 if (top != RENDER_LINE_NONE && bottom != RENDER_LINE_NONE && !shorten
743 && cell_color_equal (top_color, bottom_color))
744 dump_line (xr, x, y0, x, y3, top, top_color);
747 if (top != RENDER_LINE_NONE)
748 dump_line (xr, x, y0, x, shorten ? y1 : y2, top, top_color);
749 if (bottom != RENDER_LINE_NONE)
750 dump_line (xr, x, shorten ? y2 : y1, x, y3, bottom, bottom_color);
755 xr_draw_line (void *xr_, int bb[TABLE_N_AXES][2],
756 enum render_line_style styles[TABLE_N_AXES][2],
757 struct cell_color colors[TABLE_N_AXES][2])
759 const int x0 = bb[H][0];
760 const int y0 = bb[V][0];
761 const int x3 = bb[H][1];
762 const int y3 = bb[V][1];
763 const int top = styles[H][0];
764 const int bottom = styles[H][1];
766 int start_side = render_direction_rtl();
767 int end_side = !start_side;
768 const int start_of_line = styles[V][start_side];
769 const int end_of_line = styles[V][end_side];
770 const struct cell_color *top_color = &colors[H][0];
771 const struct cell_color *bottom_color = &colors[H][1];
772 const struct cell_color *start_color = &colors[V][start_side];
773 const struct cell_color *end_color = &colors[V][end_side];
775 /* The algorithm here is somewhat subtle, to allow it to handle
776 all the kinds of intersections that we need.
778 Three additional ordinates are assigned along the x axis. The
779 first is xc, midway between x0 and x3. The others are x1 and
780 x2; for a single vertical line these are equal to xc, and for
781 a double vertical line they are the ordinates of the left and
782 right half of the double line.
784 yc, y1, and y2 are assigned similarly along the y axis.
786 The following diagram shows the coordinate system and output
787 for double top and bottom lines, single left line, and no
791 y0 ________________________
797 y1 = y2 = yc |######### # |
802 y3 |________#_____#_______|
804 struct xr_driver *xr = xr_;
806 /* Offset from center of each line in a pair of double lines. */
807 int double_line_ofs = (XR_LINE_SPACE + XR_LINE_WIDTH) / 2;
809 /* Are the lines along each axis single or double?
810 (It doesn't make sense to have different kinds of line on the
811 same axis, so we don't try to gracefully handle that case.) */
812 bool double_vert = top == RENDER_LINE_DOUBLE || bottom == RENDER_LINE_DOUBLE;
813 bool double_horz = start_of_line == RENDER_LINE_DOUBLE || end_of_line == RENDER_LINE_DOUBLE;
815 /* When horizontal lines are doubled,
816 the left-side line along y1 normally runs from x0 to x2,
817 and the right-side line along y1 from x3 to x1.
818 If the top-side line is also doubled, we shorten the y1 lines,
819 so that the left-side line runs only to x1,
820 and the right-side line only to x2.
821 Otherwise, the horizontal line at y = y1 below would cut off
822 the intersection, which looks ugly:
824 y0 ________________________
829 y1 |######### ########|
832 y2 |######################|
835 y3 |______________________|
836 It is more of a judgment call when the horizontal line is
837 single. We actually choose to cut off the line anyhow, as
838 shown in the first diagram above.
840 bool shorten_y1_lines = top == RENDER_LINE_DOUBLE;
841 bool shorten_y2_lines = bottom == RENDER_LINE_DOUBLE;
842 bool shorten_yc_line = shorten_y1_lines && shorten_y2_lines;
843 int horz_line_ofs = double_vert ? double_line_ofs : 0;
844 int xc = (x0 + x3) / 2;
845 int x1 = xc - horz_line_ofs;
846 int x2 = xc + horz_line_ofs;
848 bool shorten_x1_lines = start_of_line == RENDER_LINE_DOUBLE;
849 bool shorten_x2_lines = end_of_line == RENDER_LINE_DOUBLE;
850 bool shorten_xc_line = shorten_x1_lines && shorten_x2_lines;
851 int vert_line_ofs = double_horz ? double_line_ofs : 0;
852 int yc = (y0 + y3) / 2;
853 int y1 = yc - vert_line_ofs;
854 int y2 = yc + vert_line_ofs;
857 horz_line (xr, x0, x1, x2, x3, yc, start_of_line, end_of_line,
858 start_color, end_color, shorten_yc_line);
861 horz_line (xr, x0, x1, x2, x3, y1, start_of_line, end_of_line,
862 start_color, end_color, shorten_y1_lines);
863 horz_line (xr, x0, x1, x2, x3, y2, start_of_line, end_of_line,
864 start_color, end_color, shorten_y2_lines);
868 vert_line (xr, y0, y1, y2, y3, xc, top, bottom, top_color, bottom_color,
872 vert_line (xr, y0, y1, y2, y3, x1, top, bottom, top_color, bottom_color,
874 vert_line (xr, y0, y1, y2, y3, x2, top, bottom, top_color, bottom_color,
880 xr_measure_cell_width (void *xr_, const struct table_cell *cell,
881 int *min_width, int *max_width)
883 struct xr_driver *xr = xr_;
884 int bb[TABLE_N_AXES][2];
885 int clip[TABLE_N_AXES][2];
892 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
893 xr_layout_cell (xr, cell, bb, clip, max_width, &h, NULL);
896 xr_layout_cell (xr, cell, bb, clip, min_width, &h, NULL);
899 *min_width += px_to_xr (cell->style->margin[H][0]
900 + cell->style->margin[H][1]);
902 *max_width += px_to_xr (cell->style->margin[H][0]
903 + cell->style->margin[H][1]);
907 xr_measure_cell_height (void *xr_, const struct table_cell *cell, int width)
909 struct xr_driver *xr = xr_;
910 int bb[TABLE_N_AXES][2];
911 int clip[TABLE_N_AXES][2];
915 bb[H][1] = width - px_to_xr (cell->style->margin[H][0]
916 + cell->style->margin[H][1]);
919 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
920 xr_layout_cell (xr, cell, bb, clip, &w, &h, NULL);
921 h += px_to_xr (cell->style->margin[V][0] + cell->style->margin[V][1]);
925 static void xr_clip (struct xr_driver *, int clip[TABLE_N_AXES][2]);
928 xr_draw_cell (void *xr_, const struct table_cell *cell, int color_idx,
929 int bb[TABLE_N_AXES][2],
930 int spill[TABLE_N_AXES][2],
931 int clip[TABLE_N_AXES][2])
933 struct xr_driver *xr = xr_;
936 cairo_save (xr->cairo);
937 int bg_clip[TABLE_N_AXES][2];
938 for (int axis = 0; axis < TABLE_N_AXES; axis++)
940 bg_clip[axis][0] = clip[axis][0];
941 if (bb[axis][0] == clip[axis][0])
942 bg_clip[axis][0] -= spill[axis][0];
944 bg_clip[axis][1] = clip[axis][1];
945 if (bb[axis][1] == clip[axis][1])
946 bg_clip[axis][1] += spill[axis][1];
948 xr_clip (xr, bg_clip);
949 cairo_set_source_rgb (xr->cairo,
950 cell->style->bg[color_idx].r / 255.,
951 cell->style->bg[color_idx].g / 255.,
952 cell->style->bg[color_idx].b / 255.);
954 bb[H][0] - spill[H][0],
955 bb[V][0] - spill[V][0],
956 bb[H][1] + spill[H][1],
957 bb[V][1] + spill[V][1]);
958 cairo_restore (xr->cairo);
960 cairo_save (xr->cairo);
961 cairo_set_source_rgb (xr->cairo,
962 cell->style->fg[color_idx].r / 255.,
963 cell->style->fg[color_idx].g / 255.,
964 cell->style->fg[color_idx].b / 255.);
966 for (int axis = 0; axis < TABLE_N_AXES; axis++)
968 bb[axis][0] += px_to_xr (cell->style->margin[axis][0]);
969 bb[axis][1] -= px_to_xr (cell->style->margin[axis][1]);
971 if (bb[H][0] < bb[H][1] && bb[V][0] < bb[V][1])
972 xr_layout_cell (xr, cell, bb, clip, &w, &h, &brk);
973 cairo_restore (xr->cairo);
977 xr_adjust_break (void *xr_, const struct table_cell *cell,
978 int width, int height)
980 struct xr_driver *xr = xr_;
981 int bb[TABLE_N_AXES][2];
982 int clip[TABLE_N_AXES][2];
985 if (xr_measure_cell_height (xr_, cell, width) < height)
989 bb[H][1] = width - px_to_xr (cell->style->margin[H][0]
990 + cell->style->margin[H][1]);
994 bb[V][1] = height - px_to_xr (cell->style->margin[V][0]
995 + cell->style->margin[V][1]);
996 clip[H][0] = clip[H][1] = clip[V][0] = clip[V][1] = 0;
997 xr_layout_cell (xr, cell, bb, clip, &w, &h, &brk);
1002 xr_clip (struct xr_driver *xr, int clip[TABLE_N_AXES][2])
1004 if (clip[H][1] != INT_MAX || clip[V][1] != INT_MAX)
1006 double x0 = xr_to_pt (clip[H][0] + xr->x);
1007 double y0 = xr_to_pt (clip[V][0] + xr->y);
1008 double x1 = xr_to_pt (clip[H][1] + xr->x);
1009 double y1 = xr_to_pt (clip[V][1] + xr->y);
1011 cairo_rectangle (xr->cairo, x0, y0, x1 - x0, y1 - y0);
1012 cairo_clip (xr->cairo);
1017 add_attr_with_start (PangoAttrList *list, PangoAttribute *attr, guint start_index)
1019 attr->start_index = start_index;
1020 pango_attr_list_insert (list, attr);
1024 markup_escape (const char *in, struct string *out)
1026 for (int c = *in++; c; c = *in++)
1030 ds_put_cstr (out, "&");
1033 ds_put_cstr (out, "<");
1036 ds_put_cstr (out, ">");
1039 ds_put_byte (out, c);
1045 xr_layout_cell_text (struct xr_driver *xr,
1046 const struct cell_contents *contents,
1047 const struct cell_style *style,
1048 int bb[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
1049 int *widthp, int *brk)
1051 unsigned int options = contents->options;
1054 struct xr_font *font = (options & TAB_FIX ? &xr->fonts[XR_FONT_FIXED]
1055 : options & TAB_EMPH ? &xr->fonts[XR_FONT_EMPHASIS]
1056 : &xr->fonts[XR_FONT_PROPORTIONAL]);
1057 struct xr_font local_font;
1060 PangoFontDescription *desc = parse_font (
1062 style->font_size ? style->font_size * 1000 * 72 / 128 : 10000,
1063 style->bold, style->italic);
1066 PangoLayout *layout = pango_cairo_create_layout (xr->cairo);
1067 pango_layout_set_font_description (layout, desc);
1069 local_font.desc = desc;
1070 local_font.layout = layout;
1075 int footnote_adjustment;
1076 if (contents->n_footnotes == 0)
1077 footnote_adjustment = 0;
1078 else if (contents->n_footnotes == 1 && (options & TAB_HALIGN) == TAB_RIGHT)
1080 PangoAttrList *attrs;
1082 const char *marker = contents->footnotes[0]->marker;
1083 pango_layout_set_text (font->layout, marker, strlen (marker));
1085 attrs = pango_attr_list_new ();
1086 pango_attr_list_insert (attrs, pango_attr_rise_new (7000));
1087 pango_layout_set_attributes (font->layout, attrs);
1088 pango_attr_list_unref (attrs);
1090 pango_layout_get_size (font->layout, &w, &h);
1091 footnote_adjustment = MIN (w, px_to_xr (style->margin[H][1]));
1094 footnote_adjustment = px_to_xr (style->margin[H][1]);
1096 struct string tmp = DS_EMPTY_INITIALIZER;
1097 const char *text = contents->text;
1099 /* Deal with an oddity of the Unicode line-breaking algorithm (or perhaps in
1100 Pango's implementation of it): it will break after a period or a comma
1101 that precedes a digit, e.g. in ".000" it will break after the period.
1102 This code looks for such a situation and inserts a U+2060 WORD JOINER
1103 to prevent the break.
1105 This isn't necessary when the decimal point is between two digits
1106 (e.g. "0.000" won't be broken) or when the display width is not limited so
1107 that word wrapping won't happen.
1109 It isn't necessary to look for more than one period or comma, as would
1110 happen with grouping like 1,234,567.89 or 1.234.567,89 because if groups
1111 are present then there will always be a digit on both sides of every
1112 period and comma. */
1113 if (bb[H][1] != INT_MAX)
1115 const char *decimal = text + strcspn (text, ".,");
1117 && c_isdigit (decimal[1])
1118 && (decimal == text || !c_isdigit (decimal[-1])))
1120 ds_extend (&tmp, strlen (text) + 16);
1121 ds_put_substring (&tmp, ss_buffer (text, decimal - text + 1));
1122 ds_put_unichar (&tmp, 0x2060 /* U+2060 WORD JOINER */);
1123 ds_put_cstr (&tmp, decimal + 1);
1127 if (footnote_adjustment)
1129 bb[H][1] += footnote_adjustment;
1131 if (ds_is_empty (&tmp))
1133 ds_extend (&tmp, strlen (text) + 16);
1134 ds_put_cstr (&tmp, text);
1136 size_t initial_length = ds_length (&tmp);
1138 for (size_t i = 0; i < contents->n_footnotes; i++)
1141 ds_put_byte (&tmp, ',');
1143 const char *marker = contents->footnotes[i]->marker;
1144 if (options & TAB_MARKUP)
1145 markup_escape (marker, &tmp);
1147 ds_put_cstr (&tmp, marker);
1150 if (options & TAB_MARKUP)
1151 pango_layout_set_markup (font->layout,
1152 ds_cstr (&tmp), ds_length (&tmp));
1154 pango_layout_set_text (font->layout, ds_cstr (&tmp), ds_length (&tmp));
1156 PangoAttrList *attrs = pango_attr_list_new ();
1157 if (style->underline)
1158 pango_attr_list_insert (attrs, pango_attr_underline_new (
1159 PANGO_UNDERLINE_SINGLE));
1160 add_attr_with_start (attrs, pango_attr_rise_new (7000), initial_length);
1161 add_attr_with_start (
1162 attrs, pango_attr_font_desc_new (font->desc), initial_length);
1163 pango_layout_set_attributes (font->layout, attrs);
1164 pango_attr_list_unref (attrs);
1168 const char *content = ds_is_empty (&tmp) ? text : ds_cstr (&tmp);
1169 if (options & TAB_MARKUP)
1170 pango_layout_set_markup (font->layout, content, -1);
1172 pango_layout_set_text (font->layout, content, -1);
1174 if (style->underline)
1176 PangoAttrList *attrs = pango_attr_list_new ();
1177 pango_attr_list_insert (attrs, pango_attr_underline_new (
1178 PANGO_UNDERLINE_SINGLE));
1179 pango_layout_set_attributes (font->layout, attrs);
1180 pango_attr_list_unref (attrs);
1185 pango_layout_set_alignment (
1187 ((options & TAB_HALIGN) == TAB_RIGHT ? PANGO_ALIGN_RIGHT
1188 : (options & TAB_HALIGN) == TAB_LEFT ? PANGO_ALIGN_LEFT
1189 : PANGO_ALIGN_CENTER));
1190 pango_layout_set_width (
1192 bb[H][1] == INT_MAX ? -1 : xr_to_pango (bb[H][1] - bb[H][0]));
1193 pango_layout_set_wrap (font->layout, PANGO_WRAP_WORD);
1195 if (clip[H][0] != clip[H][1])
1197 cairo_save (xr->cairo);
1199 cairo_translate (xr->cairo,
1200 xr_to_pt (bb[H][0] + xr->x),
1201 xr_to_pt (bb[V][0] + xr->y));
1202 pango_cairo_show_layout (xr->cairo, font->layout);
1204 /* If enabled, this draws a blue rectangle around the extents of each
1205 line of text, which can be rather useful for debugging layout
1209 PangoLayoutIter *iter;
1210 iter = pango_layout_get_iter (font->layout);
1213 PangoRectangle extents;
1215 pango_layout_iter_get_line_extents (iter, &extents, NULL);
1216 cairo_save (xr->cairo);
1217 cairo_set_source_rgb (xr->cairo, 1, 0, 0);
1219 pango_to_xr (extents.x) - xr->x,
1220 pango_to_xr (extents.y) - xr->y,
1221 pango_to_xr (extents.x + extents.width) - xr->x,
1222 pango_to_xr (extents.y + extents.height) - xr->y);
1223 cairo_restore (xr->cairo);
1225 while (pango_layout_iter_next_line (iter));
1226 pango_layout_iter_free (iter);
1229 cairo_restore (xr->cairo);
1232 pango_layout_get_size (font->layout, &w, &h);
1233 w = pango_to_xr (w);
1234 h = pango_to_xr (h);
1237 if (bb[V][0] + h >= bb[V][1])
1239 PangoLayoutIter *iter;
1240 int best UNUSED = 0;
1242 /* Choose a breakpoint between lines instead of in the middle of one. */
1243 iter = pango_layout_get_iter (font->layout);
1246 PangoRectangle extents;
1250 pango_layout_iter_get_line_extents (iter, NULL, &extents);
1251 pango_layout_iter_get_line_yrange (iter, &y0, &y1);
1252 extents.x = pango_to_xr (extents.x);
1253 extents.y = pango_to_xr (y0);
1254 extents.width = pango_to_xr (extents.width);
1255 extents.height = pango_to_xr (y1 - y0);
1256 bottom = bb[V][0] + extents.y + extents.height;
1257 if (bottom < bb[V][1])
1259 if (brk && clip[H][0] != clip[H][1])
1267 while (pango_layout_iter_next_line (iter));
1268 pango_layout_iter_free (iter);
1270 /* If enabled, draws a green line across the chosen breakpoint, which can
1271 be useful for debugging issues with breaking. */
1274 if (best && !xr->nest)
1275 dump_line (xr, -xr->left_margin, best,
1276 xr->width + xr->right_margin, best,
1277 RENDER_LINE_SINGLE, &CELL_COLOR (0, 255, 0));
1281 pango_layout_set_attributes (font->layout, NULL);
1283 if (font == &local_font)
1285 g_object_unref (G_OBJECT (font->layout));
1286 pango_font_description_free (font->desc);
1289 return bb[V][0] + h;
1293 xr_layout_cell (struct xr_driver *xr, const struct table_cell *cell,
1294 int bb_[TABLE_N_AXES][2], int clip[TABLE_N_AXES][2],
1295 int *width, int *height, int *brk)
1297 int bb[TABLE_N_AXES][2];
1305 memcpy (bb, bb_, sizeof bb);
1307 /* If enabled, draws a blue rectangle around the cell extents, which can be
1308 useful for debugging layout. */
1311 if (clip[H][0] != clip[H][1])
1313 int offset = (xr->nest) * XR_POINT;
1315 cairo_save (xr->cairo);
1316 cairo_set_source_rgb (xr->cairo, 0, 0, 1);
1318 bb[H][0] + offset, bb[V][0] + offset,
1319 bb[H][1] - offset, bb[V][1] - offset);
1320 cairo_restore (xr->cairo);
1324 for (i = 0; i < cell->n_contents && bb[V][0] < bb[V][1]; i++)
1326 const struct cell_contents *contents = &cell->contents[i];
1332 bb[V][0] += xr->char_height / 2;
1333 if (bb[V][0] >= bb[V][1])
1339 bb[V][0] = xr_layout_cell_text (xr, contents, cell->style, bb, clip,
1342 *height = bb[V][0] - bb_[V][0];
1345 struct output_driver_factory pdf_driver_factory =
1346 { "pdf", "pspp.pdf", xr_pdf_create };
1347 struct output_driver_factory ps_driver_factory =
1348 { "ps", "pspp.ps", xr_ps_create };
1349 struct output_driver_factory svg_driver_factory =
1350 { "svg", "pspp.svg", xr_svg_create };
1352 static const struct output_driver_class cairo_driver_class =
1360 /* GUI rendering helpers. */
1364 struct output_item *item;
1367 struct render_pager *p;
1368 struct xr_driver *xr;
1371 #define CHART_WIDTH 500
1372 #define CHART_HEIGHT 375
1377 xr_driver_create (cairo_t *cairo, struct string_map *options)
1379 struct xr_driver *xr = xr_allocate ("cairo", 0, options);
1380 if (!xr_set_cairo (xr, cairo))
1382 output_driver_destroy (&xr->driver);
1388 /* Destroy XR, which should have been created with xr_driver_create(). Any
1389 cairo_t added to XR is not destroyed, because it is owned by the client. */
1391 xr_driver_destroy (struct xr_driver *xr)
1396 output_driver_destroy (&xr->driver);
1400 static struct xr_rendering *
1401 xr_rendering_create_text (struct xr_driver *xr, const char *text, cairo_t *cr)
1403 struct table_item *table_item;
1404 struct xr_rendering *r;
1406 table_item = table_item_create (table_from_string (TAB_LEFT, text),
1408 r = xr_rendering_create (xr, &table_item->output_item, cr);
1409 table_item_unref (table_item);
1415 xr_rendering_apply_options (struct xr_rendering *xr, struct string_map *o)
1417 if (is_table_item (xr->item))
1418 apply_options (xr->xr, o);
1421 struct xr_rendering *
1422 xr_rendering_create (struct xr_driver *xr, const struct output_item *item,
1425 struct xr_rendering *r = NULL;
1427 if (is_text_item (item))
1428 r = xr_rendering_create_text (xr, text_item_get_text (to_text_item (item)),
1430 else if (is_message_item (item))
1432 const struct message_item *message_item = to_message_item (item);
1433 char *s = msg_to_string (message_item_get_msg (message_item));
1434 r = xr_rendering_create_text (xr, s, cr);
1437 else if (is_table_item (item))
1439 r = xzalloc (sizeof *r);
1440 r->item = output_item_ref (item);
1442 xr_set_cairo (xr, cr);
1443 r->p = render_pager_create (xr->params, to_table_item (item));
1445 else if (is_chart_item (item))
1447 r = xzalloc (sizeof *r);
1448 r->item = output_item_ref (item);
1450 else if (is_group_open_item (item))
1451 r = xr_rendering_create_text (xr, to_group_open_item (item)->command_name,
1458 xr_rendering_destroy (struct xr_rendering *r)
1462 output_item_unref (r->item);
1463 render_pager_destroy (r->p);
1469 xr_rendering_measure (struct xr_rendering *r, int *w, int *h)
1471 if (is_table_item (r->item))
1473 *w = render_pager_get_size (r->p, H) / XR_POINT;
1474 *h = render_pager_get_size (r->p, V) / XR_POINT;
1483 static void xr_draw_chart (const struct chart_item *, cairo_t *,
1484 double x, double y, double width, double height);
1488 xr_rendering_draw (struct xr_rendering *r, cairo_t *cr,
1489 int x0, int y0, int x1, int y1)
1491 if (is_table_item (r->item))
1493 struct xr_driver *xr = r->xr;
1495 xr_set_cairo (xr, cr);
1497 render_pager_draw_region (r->p, x0 * XR_POINT, y0 * XR_POINT,
1498 (x1 - x0) * XR_POINT, (y1 - y0) * XR_POINT);
1501 xr_draw_chart (to_chart_item (r->item), cr,
1502 0, 0, CHART_WIDTH, CHART_HEIGHT);
1506 xr_draw_chart (const struct chart_item *chart_item, cairo_t *cr,
1507 double x, double y, double width, double height)
1509 struct xrchart_geometry geom;
1512 cairo_translate (cr, x, y + height);
1513 cairo_scale (cr, 1.0, -1.0);
1514 xrchart_geometry_init (cr, &geom, width, height);
1515 if (is_boxplot (chart_item))
1516 xrchart_draw_boxplot (chart_item, cr, &geom);
1517 else if (is_histogram_chart (chart_item))
1518 xrchart_draw_histogram (chart_item, cr, &geom);
1519 else if (is_np_plot_chart (chart_item))
1520 xrchart_draw_np_plot (chart_item, cr, &geom);
1521 else if (is_piechart (chart_item))
1522 xrchart_draw_piechart (chart_item, cr, &geom);
1523 else if (is_barchart (chart_item))
1524 xrchart_draw_barchart (chart_item, cr, &geom);
1525 else if (is_roc_chart (chart_item))
1526 xrchart_draw_roc (chart_item, cr, &geom);
1527 else if (is_scree (chart_item))
1528 xrchart_draw_scree (chart_item, cr, &geom);
1529 else if (is_spreadlevel_plot_chart (chart_item))
1530 xrchart_draw_spreadlevel (chart_item, cr, &geom);
1531 else if (is_scatterplot_chart (chart_item))
1532 xrchart_draw_scatterplot (chart_item, cr, &geom);
1535 xrchart_geometry_free (cr, &geom);
1541 xr_draw_png_chart (const struct chart_item *item,
1542 const char *file_name_template, int number,
1543 const struct xr_color *fg,
1544 const struct xr_color *bg
1547 const int width = 640;
1548 const int length = 480;
1550 cairo_surface_t *surface;
1551 cairo_status_t status;
1552 const char *number_pos;
1556 number_pos = strchr (file_name_template, '#');
1557 if (number_pos != NULL)
1558 file_name = xasprintf ("%.*s%d%s", (int) (number_pos - file_name_template),
1559 file_name_template, number, number_pos + 1);
1561 file_name = xstrdup (file_name_template);
1563 surface = cairo_image_surface_create (CAIRO_FORMAT_RGB24, width, length);
1564 cr = cairo_create (surface);
1566 cairo_set_source_rgb (cr, bg->red, bg->green, bg->blue);
1569 cairo_set_source_rgb (cr, fg->red, fg->green, fg->blue);
1571 xr_draw_chart (item, cr, 0.0, 0.0, width, length);
1573 status = cairo_surface_write_to_png (surface, file_name);
1574 if (status != CAIRO_STATUS_SUCCESS)
1575 msg (ME, _("error writing output file `%s': %s"),
1576 file_name, cairo_status_to_string (status));
1579 cairo_surface_destroy (surface);
1584 struct xr_table_state
1586 struct xr_render_fsm fsm;
1587 struct render_pager *p;
1591 xr_table_render (struct xr_render_fsm *fsm, struct xr_driver *xr)
1593 struct xr_table_state *ts = UP_CAST (fsm, struct xr_table_state, fsm);
1595 while (render_pager_has_next (ts->p))
1599 used = render_pager_draw_next (ts->p, xr->length - xr->y);
1612 xr_table_destroy (struct xr_render_fsm *fsm)
1614 struct xr_table_state *ts = UP_CAST (fsm, struct xr_table_state, fsm);
1616 render_pager_destroy (ts->p);
1620 static struct xr_render_fsm *
1621 xr_render_table (struct xr_driver *xr, struct table_item *table_item)
1623 struct xr_table_state *ts;
1625 ts = xmalloc (sizeof *ts);
1626 ts->fsm.render = xr_table_render;
1627 ts->fsm.destroy = xr_table_destroy;
1630 xr->y += xr->char_height;
1632 ts->p = render_pager_create (xr->params, table_item);
1633 table_item_unref (table_item);
1638 struct xr_chart_state
1640 struct xr_render_fsm fsm;
1641 struct chart_item *chart_item;
1645 xr_chart_render (struct xr_render_fsm *fsm, struct xr_driver *xr)
1647 struct xr_chart_state *cs = UP_CAST (fsm, struct xr_chart_state, fsm);
1649 const int chart_height = 0.8 * (xr->length < xr->width ? xr->length : xr->width);
1651 if (xr->y > xr->length - chart_height)
1654 if (xr->cairo != NULL)
1656 xr_draw_chart (cs->chart_item, xr->cairo,
1659 xr_to_pt (xr->width),
1660 xr_to_pt (chart_height));
1662 xr->y += chart_height;
1668 xr_chart_destroy (struct xr_render_fsm *fsm)
1670 struct xr_chart_state *cs = UP_CAST (fsm, struct xr_chart_state, fsm);
1672 chart_item_unref (cs->chart_item);
1676 static struct xr_render_fsm *
1677 xr_render_chart (const struct chart_item *chart_item)
1679 struct xr_chart_state *cs;
1681 cs = xmalloc (sizeof *cs);
1682 cs->fsm.render = xr_chart_render;
1683 cs->fsm.destroy = xr_chart_destroy;
1684 cs->chart_item = chart_item_ref (chart_item);
1690 xr_eject_render (struct xr_render_fsm *fsm UNUSED, struct xr_driver *xr)
1696 xr_eject_destroy (struct xr_render_fsm *fsm UNUSED)
1698 /* Nothing to do. */
1701 static struct xr_render_fsm *
1702 xr_render_eject (void)
1704 static struct xr_render_fsm eject_renderer =
1710 return &eject_renderer;
1713 static struct xr_render_fsm *
1714 xr_render_text (struct xr_driver *xr, const struct text_item *text_item)
1716 enum text_item_type type = text_item_get_type (text_item);
1720 case TEXT_ITEM_PAGE_TITLE:
1723 case TEXT_ITEM_BLANK_LINE:
1725 xr->y += xr->char_height;
1728 case TEXT_ITEM_EJECT_PAGE:
1730 return xr_render_eject ();
1734 return xr_render_table (
1735 xr, text_item_to_table_item (text_item_ref (text_item)));
1741 static struct xr_render_fsm *
1742 xr_render_message (struct xr_driver *xr,
1743 const struct message_item *message_item)
1745 char *s = msg_to_string (message_item_get_msg (message_item));
1746 struct text_item *item = text_item_create (TEXT_ITEM_PARAGRAPH, s);
1748 return xr_render_table (xr, text_item_to_table_item (item));
1751 static struct xr_render_fsm *
1752 xr_render_output_item (struct xr_driver *xr,
1753 const struct output_item *output_item)
1755 if (is_table_item (output_item))
1756 return xr_render_table (xr, table_item_ref (to_table_item (output_item)));
1757 else if (is_chart_item (output_item))
1758 return xr_render_chart (to_chart_item (output_item));
1759 else if (is_text_item (output_item))
1760 return xr_render_text (xr, to_text_item (output_item));
1761 else if (is_message_item (output_item))
1762 return xr_render_message (xr, to_message_item (output_item));