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Without HAVE_ERR, don't try to include <err.h>, it probably isn't there.
[mandoc.git] / term_ps.c
1 /* $Id: term_ps.c,v 1.79 2015/11/07 14:22:29 schwarze Exp $ */
2 /*
3 * Copyright (c) 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
4 * Copyright (c) 2014, 2015 Ingo Schwarze <schwarze@openbsd.org>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18 #include "config.h"
19
20 #include <sys/types.h>
21
22 #include <assert.h>
23 #if HAVE_ERR
24 #include <err.h>
25 #endif
26 #include <stdarg.h>
27 #include <stdint.h>
28 #include <stdio.h>
29 #include <stdlib.h>
30 #include <string.h>
31 #include <unistd.h>
32
33 #include "mandoc_aux.h"
34 #include "out.h"
35 #include "term.h"
36 #include "manconf.h"
37 #include "main.h"
38
39 /* These work the buffer used by the header and footer. */
40 #define PS_BUFSLOP 128
41
42 /* Convert PostScript point "x" to an AFM unit. */
43 #define PNT2AFM(p, x) \
44 (size_t)((double)(x) * (1000.0 / (double)(p)->ps->scale))
45
46 /* Convert an AFM unit "x" to a PostScript points */
47 #define AFM2PNT(p, x) \
48 ((double)(x) / (1000.0 / (double)(p)->ps->scale))
49
50 struct glyph {
51 unsigned short wx; /* WX in AFM */
52 };
53
54 struct font {
55 const char *name; /* FontName in AFM */
56 #define MAXCHAR 95 /* total characters we can handle */
57 struct glyph gly[MAXCHAR]; /* glyph metrics */
58 };
59
60 struct termp_ps {
61 int flags;
62 #define PS_INLINE (1 << 0) /* we're in a word */
63 #define PS_MARGINS (1 << 1) /* we're in the margins */
64 #define PS_NEWPAGE (1 << 2) /* new page, no words yet */
65 #define PS_BACKSP (1 << 3) /* last character was backspace */
66 size_t pscol; /* visible column (AFM units) */
67 size_t pscolnext; /* used for overstrike */
68 size_t psrow; /* visible row (AFM units) */
69 char *psmarg; /* margin buf */
70 size_t psmargsz; /* margin buf size */
71 size_t psmargcur; /* cur index in margin buf */
72 char last; /* last non-backspace seen */
73 enum termfont lastf; /* last set font */
74 enum termfont nextf; /* building next font here */
75 size_t scale; /* font scaling factor */
76 size_t pages; /* number of pages shown */
77 size_t lineheight; /* line height (AFM units) */
78 size_t top; /* body top (AFM units) */
79 size_t bottom; /* body bottom (AFM units) */
80 size_t height; /* page height (AFM units */
81 size_t width; /* page width (AFM units) */
82 size_t lastwidth; /* page width before last ll */
83 size_t left; /* body left (AFM units) */
84 size_t header; /* header pos (AFM units) */
85 size_t footer; /* footer pos (AFM units) */
86 size_t pdfbytes; /* current output byte */
87 size_t pdflastpg; /* byte of last page mark */
88 size_t pdfbody; /* start of body object */
89 size_t *pdfobjs; /* table of object offsets */
90 size_t pdfobjsz; /* size of pdfobjs */
91 };
92
93 static int ps_hspan(const struct termp *,
94 const struct roffsu *);
95 static size_t ps_width(const struct termp *, int);
96 static void ps_advance(struct termp *, size_t);
97 static void ps_begin(struct termp *);
98 static void ps_closepage(struct termp *);
99 static void ps_end(struct termp *);
100 static void ps_endline(struct termp *);
101 static void ps_fclose(struct termp *);
102 static void ps_growbuf(struct termp *, size_t);
103 static void ps_letter(struct termp *, int);
104 static void ps_pclose(struct termp *);
105 static void ps_pletter(struct termp *, int);
106 #if __GNUC__ - 0 >= 4
107 __attribute__((__format__ (__printf__, 2, 3)))
108 #endif
109 static void ps_printf(struct termp *, const char *, ...);
110 static void ps_putchar(struct termp *, char);
111 static void ps_setfont(struct termp *, enum termfont);
112 static void ps_setwidth(struct termp *, int, int);
113 static struct termp *pspdf_alloc(const struct manoutput *);
114 static void pdf_obj(struct termp *, size_t);
115
116 /*
117 * We define, for the time being, three fonts: bold, oblique/italic, and
118 * normal (roman). The following table hard-codes the font metrics for
119 * ASCII, i.e., 32--127.
120 */
121
122 static const struct font fonts[TERMFONT__MAX] = {
123 { "Times-Roman", {
124 { 250 },
125 { 333 },
126 { 408 },
127 { 500 },
128 { 500 },
129 { 833 },
130 { 778 },
131 { 333 },
132 { 333 },
133 { 333 },
134 { 500 },
135 { 564 },
136 { 250 },
137 { 333 },
138 { 250 },
139 { 278 },
140 { 500 },
141 { 500 },
142 { 500 },
143 { 500 },
144 { 500 },
145 { 500 },
146 { 500 },
147 { 500 },
148 { 500 },
149 { 500 },
150 { 278 },
151 { 278 },
152 { 564 },
153 { 564 },
154 { 564 },
155 { 444 },
156 { 921 },
157 { 722 },
158 { 667 },
159 { 667 },
160 { 722 },
161 { 611 },
162 { 556 },
163 { 722 },
164 { 722 },
165 { 333 },
166 { 389 },
167 { 722 },
168 { 611 },
169 { 889 },
170 { 722 },
171 { 722 },
172 { 556 },
173 { 722 },
174 { 667 },
175 { 556 },
176 { 611 },
177 { 722 },
178 { 722 },
179 { 944 },
180 { 722 },
181 { 722 },
182 { 611 },
183 { 333 },
184 { 278 },
185 { 333 },
186 { 469 },
187 { 500 },
188 { 333 },
189 { 444 },
190 { 500 },
191 { 444 },
192 { 500},
193 { 444},
194 { 333},
195 { 500},
196 { 500},
197 { 278},
198 { 278},
199 { 500},
200 { 278},
201 { 778},
202 { 500},
203 { 500},
204 { 500},
205 { 500},
206 { 333},
207 { 389},
208 { 278},
209 { 500},
210 { 500},
211 { 722},
212 { 500},
213 { 500},
214 { 444},
215 { 480},
216 { 200},
217 { 480},
218 { 541},
219 } },
220 { "Times-Bold", {
221 { 250 },
222 { 333 },
223 { 555 },
224 { 500 },
225 { 500 },
226 { 1000 },
227 { 833 },
228 { 333 },
229 { 333 },
230 { 333 },
231 { 500 },
232 { 570 },
233 { 250 },
234 { 333 },
235 { 250 },
236 { 278 },
237 { 500 },
238 { 500 },
239 { 500 },
240 { 500 },
241 { 500 },
242 { 500 },
243 { 500 },
244 { 500 },
245 { 500 },
246 { 500 },
247 { 333 },
248 { 333 },
249 { 570 },
250 { 570 },
251 { 570 },
252 { 500 },
253 { 930 },
254 { 722 },
255 { 667 },
256 { 722 },
257 { 722 },
258 { 667 },
259 { 611 },
260 { 778 },
261 { 778 },
262 { 389 },
263 { 500 },
264 { 778 },
265 { 667 },
266 { 944 },
267 { 722 },
268 { 778 },
269 { 611 },
270 { 778 },
271 { 722 },
272 { 556 },
273 { 667 },
274 { 722 },
275 { 722 },
276 { 1000 },
277 { 722 },
278 { 722 },
279 { 667 },
280 { 333 },
281 { 278 },
282 { 333 },
283 { 581 },
284 { 500 },
285 { 333 },
286 { 500 },
287 { 556 },
288 { 444 },
289 { 556 },
290 { 444 },
291 { 333 },
292 { 500 },
293 { 556 },
294 { 278 },
295 { 333 },
296 { 556 },
297 { 278 },
298 { 833 },
299 { 556 },
300 { 500 },
301 { 556 },
302 { 556 },
303 { 444 },
304 { 389 },
305 { 333 },
306 { 556 },
307 { 500 },
308 { 722 },
309 { 500 },
310 { 500 },
311 { 444 },
312 { 394 },
313 { 220 },
314 { 394 },
315 { 520 },
316 } },
317 { "Times-Italic", {
318 { 250 },
319 { 333 },
320 { 420 },
321 { 500 },
322 { 500 },
323 { 833 },
324 { 778 },
325 { 333 },
326 { 333 },
327 { 333 },
328 { 500 },
329 { 675 },
330 { 250 },
331 { 333 },
332 { 250 },
333 { 278 },
334 { 500 },
335 { 500 },
336 { 500 },
337 { 500 },
338 { 500 },
339 { 500 },
340 { 500 },
341 { 500 },
342 { 500 },
343 { 500 },
344 { 333 },
345 { 333 },
346 { 675 },
347 { 675 },
348 { 675 },
349 { 500 },
350 { 920 },
351 { 611 },
352 { 611 },
353 { 667 },
354 { 722 },
355 { 611 },
356 { 611 },
357 { 722 },
358 { 722 },
359 { 333 },
360 { 444 },
361 { 667 },
362 { 556 },
363 { 833 },
364 { 667 },
365 { 722 },
366 { 611 },
367 { 722 },
368 { 611 },
369 { 500 },
370 { 556 },
371 { 722 },
372 { 611 },
373 { 833 },
374 { 611 },
375 { 556 },
376 { 556 },
377 { 389 },
378 { 278 },
379 { 389 },
380 { 422 },
381 { 500 },
382 { 333 },
383 { 500 },
384 { 500 },
385 { 444 },
386 { 500 },
387 { 444 },
388 { 278 },
389 { 500 },
390 { 500 },
391 { 278 },
392 { 278 },
393 { 444 },
394 { 278 },
395 { 722 },
396 { 500 },
397 { 500 },
398 { 500 },
399 { 500 },
400 { 389 },
401 { 389 },
402 { 278 },
403 { 500 },
404 { 444 },
405 { 667 },
406 { 444 },
407 { 444 },
408 { 389 },
409 { 400 },
410 { 275 },
411 { 400 },
412 { 541 },
413 } },
414 { "Times-BoldItalic", {
415 { 250 },
416 { 389 },
417 { 555 },
418 { 500 },
419 { 500 },
420 { 833 },
421 { 778 },
422 { 333 },
423 { 333 },
424 { 333 },
425 { 500 },
426 { 570 },
427 { 250 },
428 { 333 },
429 { 250 },
430 { 278 },
431 { 500 },
432 { 500 },
433 { 500 },
434 { 500 },
435 { 500 },
436 { 500 },
437 { 500 },
438 { 500 },
439 { 500 },
440 { 500 },
441 { 333 },
442 { 333 },
443 { 570 },
444 { 570 },
445 { 570 },
446 { 500 },
447 { 832 },
448 { 667 },
449 { 667 },
450 { 667 },
451 { 722 },
452 { 667 },
453 { 667 },
454 { 722 },
455 { 778 },
456 { 389 },
457 { 500 },
458 { 667 },
459 { 611 },
460 { 889 },
461 { 722 },
462 { 722 },
463 { 611 },
464 { 722 },
465 { 667 },
466 { 556 },
467 { 611 },
468 { 722 },
469 { 667 },
470 { 889 },
471 { 667 },
472 { 611 },
473 { 611 },
474 { 333 },
475 { 278 },
476 { 333 },
477 { 570 },
478 { 500 },
479 { 333 },
480 { 500 },
481 { 500 },
482 { 444 },
483 { 500 },
484 { 444 },
485 { 333 },
486 { 500 },
487 { 556 },
488 { 278 },
489 { 278 },
490 { 500 },
491 { 278 },
492 { 778 },
493 { 556 },
494 { 500 },
495 { 500 },
496 { 500 },
497 { 389 },
498 { 389 },
499 { 278 },
500 { 556 },
501 { 444 },
502 { 667 },
503 { 500 },
504 { 444 },
505 { 389 },
506 { 348 },
507 { 220 },
508 { 348 },
509 { 570 },
510 } },
511 };
512
513 void *
514 pdf_alloc(const struct manoutput *outopts)
515 {
516 struct termp *p;
517
518 if (NULL != (p = pspdf_alloc(outopts)))
519 p->type = TERMTYPE_PDF;
520
521 return p;
522 }
523
524 void *
525 ps_alloc(const struct manoutput *outopts)
526 {
527 struct termp *p;
528
529 if (NULL != (p = pspdf_alloc(outopts)))
530 p->type = TERMTYPE_PS;
531
532 return p;
533 }
534
535 static struct termp *
536 pspdf_alloc(const struct manoutput *outopts)
537 {
538 struct termp *p;
539 unsigned int pagex, pagey;
540 size_t marginx, marginy, lineheight;
541 const char *pp;
542
543 p = mandoc_calloc(1, sizeof(struct termp));
544 p->enc = TERMENC_ASCII;
545 p->fontq = mandoc_reallocarray(NULL,
546 (p->fontsz = 8), sizeof(enum termfont));
547 p->fontq[0] = p->fontl = TERMFONT_NONE;
548 p->ps = mandoc_calloc(1, sizeof(struct termp_ps));
549
550 p->advance = ps_advance;
551 p->begin = ps_begin;
552 p->end = ps_end;
553 p->endline = ps_endline;
554 p->hspan = ps_hspan;
555 p->letter = ps_letter;
556 p->setwidth = ps_setwidth;
557 p->width = ps_width;
558
559 /* Default to US letter (millimetres). */
560
561 pagex = 216;
562 pagey = 279;
563
564 /*
565 * The ISO-269 paper sizes can be calculated automatically, but
566 * it would require bringing in -lm for pow() and I'd rather not
567 * do that. So just do it the easy way for now. Since this
568 * only happens once, I'm not terribly concerned.
569 */
570
571 pp = outopts->paper;
572 if (pp && strcasecmp(pp, "letter")) {
573 if (0 == strcasecmp(pp, "a3")) {
574 pagex = 297;
575 pagey = 420;
576 } else if (0 == strcasecmp(pp, "a4")) {
577 pagex = 210;
578 pagey = 297;
579 } else if (0 == strcasecmp(pp, "a5")) {
580 pagex = 148;
581 pagey = 210;
582 } else if (0 == strcasecmp(pp, "legal")) {
583 pagex = 216;
584 pagey = 356;
585 } else if (2 != sscanf(pp, "%ux%u", &pagex, &pagey))
586 warnx("%s: Unknown paper", pp);
587 }
588
589 /*
590 * This MUST be defined before any PNT2AFM or AFM2PNT
591 * calculations occur.
592 */
593
594 p->ps->scale = 11;
595
596 /* Remember millimetres -> AFM units. */
597
598 pagex = PNT2AFM(p, ((double)pagex * 2.834));
599 pagey = PNT2AFM(p, ((double)pagey * 2.834));
600
601 /* Margins are 1/9 the page x and y. */
602
603 marginx = (size_t)((double)pagex / 9.0);
604 marginy = (size_t)((double)pagey / 9.0);
605
606 /* Line-height is 1.4em. */
607
608 lineheight = PNT2AFM(p, ((double)p->ps->scale * 1.4));
609
610 p->ps->width = p->ps->lastwidth = (size_t)pagex;
611 p->ps->height = (size_t)pagey;
612 p->ps->header = pagey - (marginy / 2) - (lineheight / 2);
613 p->ps->top = pagey - marginy;
614 p->ps->footer = (marginy / 2) - (lineheight / 2);
615 p->ps->bottom = marginy;
616 p->ps->left = marginx;
617 p->ps->lineheight = lineheight;
618
619 p->defrmargin = pagex - (marginx * 2);
620 return p;
621 }
622
623 static void
624 ps_setwidth(struct termp *p, int iop, int width)
625 {
626 size_t lastwidth;
627
628 lastwidth = p->ps->width;
629 if (iop > 0)
630 p->ps->width += width;
631 else if (iop == 0)
632 p->ps->width = width ? (size_t)width : p->ps->lastwidth;
633 else if (p->ps->width > (size_t)width)
634 p->ps->width -= width;
635 else
636 p->ps->width = 0;
637 p->ps->lastwidth = lastwidth;
638 }
639
640 void
641 pspdf_free(void *arg)
642 {
643 struct termp *p;
644
645 p = (struct termp *)arg;
646
647 if (p->ps->psmarg)
648 free(p->ps->psmarg);
649 if (p->ps->pdfobjs)
650 free(p->ps->pdfobjs);
651
652 free(p->ps);
653 term_free(p);
654 }
655
656 static void
657 ps_printf(struct termp *p, const char *fmt, ...)
658 {
659 va_list ap;
660 int pos, len;
661
662 va_start(ap, fmt);
663
664 /*
665 * If we're running in regular mode, then pipe directly into
666 * vprintf(). If we're processing margins, then push the data
667 * into our growable margin buffer.
668 */
669
670 if ( ! (PS_MARGINS & p->ps->flags)) {
671 len = vprintf(fmt, ap);
672 va_end(ap);
673 p->ps->pdfbytes += len < 0 ? 0 : (size_t)len;
674 return;
675 }
676
677 /*
678 * XXX: I assume that the in-margin print won't exceed
679 * PS_BUFSLOP (128 bytes), which is reasonable but still an
680 * assumption that will cause pukeage if it's not the case.
681 */
682
683 ps_growbuf(p, PS_BUFSLOP);
684
685 pos = (int)p->ps->psmargcur;
686 vsnprintf(&p->ps->psmarg[pos], PS_BUFSLOP, fmt, ap);
687
688 va_end(ap);
689
690 p->ps->psmargcur = strlen(p->ps->psmarg);
691 }
692
693 static void
694 ps_putchar(struct termp *p, char c)
695 {
696 int pos;
697
698 /* See ps_printf(). */
699
700 if ( ! (PS_MARGINS & p->ps->flags)) {
701 putchar(c);
702 p->ps->pdfbytes++;
703 return;
704 }
705
706 ps_growbuf(p, 2);
707
708 pos = (int)p->ps->psmargcur++;
709 p->ps->psmarg[pos++] = c;
710 p->ps->psmarg[pos] = '\0';
711 }
712
713 static void
714 pdf_obj(struct termp *p, size_t obj)
715 {
716
717 assert(obj > 0);
718
719 if ((obj - 1) >= p->ps->pdfobjsz) {
720 p->ps->pdfobjsz = obj + 128;
721 p->ps->pdfobjs = mandoc_reallocarray(p->ps->pdfobjs,
722 p->ps->pdfobjsz, sizeof(size_t));
723 }
724
725 p->ps->pdfobjs[(int)obj - 1] = p->ps->pdfbytes;
726 ps_printf(p, "%zu 0 obj\n", obj);
727 }
728
729 static void
730 ps_closepage(struct termp *p)
731 {
732 int i;
733 size_t len, base;
734
735 /*
736 * Close out a page that we've already flushed to output. In
737 * PostScript, we simply note that the page must be showed. In
738 * PDF, we must now create the Length, Resource, and Page node
739 * for the page contents.
740 */
741
742 assert(p->ps->psmarg && p->ps->psmarg[0]);
743 ps_printf(p, "%s", p->ps->psmarg);
744
745 if (TERMTYPE_PS != p->type) {
746 ps_printf(p, "ET\n");
747
748 len = p->ps->pdfbytes - p->ps->pdflastpg;
749 base = p->ps->pages * 4 + p->ps->pdfbody;
750
751 ps_printf(p, "endstream\nendobj\n");
752
753 /* Length of content. */
754 pdf_obj(p, base + 1);
755 ps_printf(p, "%zu\nendobj\n", len);
756
757 /* Resource for content. */
758 pdf_obj(p, base + 2);
759 ps_printf(p, "<<\n/ProcSet [/PDF /Text]\n");
760 ps_printf(p, "/Font <<\n");
761 for (i = 0; i < (int)TERMFONT__MAX; i++)
762 ps_printf(p, "/F%d %d 0 R\n", i, 3 + i);
763 ps_printf(p, ">>\n>>\n");
764
765 /* Page node. */
766 pdf_obj(p, base + 3);
767 ps_printf(p, "<<\n");
768 ps_printf(p, "/Type /Page\n");
769 ps_printf(p, "/Parent 2 0 R\n");
770 ps_printf(p, "/Resources %zu 0 R\n", base + 2);
771 ps_printf(p, "/Contents %zu 0 R\n", base);
772 ps_printf(p, ">>\nendobj\n");
773 } else
774 ps_printf(p, "showpage\n");
775
776 p->ps->pages++;
777 p->ps->psrow = p->ps->top;
778 assert( ! (PS_NEWPAGE & p->ps->flags));
779 p->ps->flags |= PS_NEWPAGE;
780 }
781
782 static void
783 ps_end(struct termp *p)
784 {
785 size_t i, xref, base;
786
787 /*
788 * At the end of the file, do one last showpage. This is the
789 * same behaviour as groff(1) and works for multiple pages as
790 * well as just one.
791 */
792
793 if ( ! (PS_NEWPAGE & p->ps->flags)) {
794 assert(0 == p->ps->flags);
795 assert('\0' == p->ps->last);
796 ps_closepage(p);
797 }
798
799 if (TERMTYPE_PS == p->type) {
800 ps_printf(p, "%%%%Trailer\n");
801 ps_printf(p, "%%%%Pages: %zu\n", p->ps->pages);
802 ps_printf(p, "%%%%EOF\n");
803 return;
804 }
805
806 pdf_obj(p, 2);
807 ps_printf(p, "<<\n/Type /Pages\n");
808 ps_printf(p, "/MediaBox [0 0 %zu %zu]\n",
809 (size_t)AFM2PNT(p, p->ps->width),
810 (size_t)AFM2PNT(p, p->ps->height));
811
812 ps_printf(p, "/Count %zu\n", p->ps->pages);
813 ps_printf(p, "/Kids [");
814
815 for (i = 0; i < p->ps->pages; i++)
816 ps_printf(p, " %zu 0 R", i * 4 + p->ps->pdfbody + 3);
817
818 base = (p->ps->pages - 1) * 4 + p->ps->pdfbody + 4;
819
820 ps_printf(p, "]\n>>\nendobj\n");
821 pdf_obj(p, base);
822 ps_printf(p, "<<\n");
823 ps_printf(p, "/Type /Catalog\n");
824 ps_printf(p, "/Pages 2 0 R\n");
825 ps_printf(p, ">>\n");
826 xref = p->ps->pdfbytes;
827 ps_printf(p, "xref\n");
828 ps_printf(p, "0 %zu\n", base + 1);
829 ps_printf(p, "0000000000 65535 f \n");
830
831 for (i = 0; i < base; i++)
832 ps_printf(p, "%.10zu 00000 n \n",
833 p->ps->pdfobjs[(int)i]);
834
835 ps_printf(p, "trailer\n");
836 ps_printf(p, "<<\n");
837 ps_printf(p, "/Size %zu\n", base + 1);
838 ps_printf(p, "/Root %zu 0 R\n", base);
839 ps_printf(p, "/Info 1 0 R\n");
840 ps_printf(p, ">>\n");
841 ps_printf(p, "startxref\n");
842 ps_printf(p, "%zu\n", xref);
843 ps_printf(p, "%%%%EOF\n");
844 }
845
846 static void
847 ps_begin(struct termp *p)
848 {
849 int i;
850
851 /*
852 * Print margins into margin buffer. Nothing gets output to the
853 * screen yet, so we don't need to initialise the primary state.
854 */
855
856 if (p->ps->psmarg) {
857 assert(p->ps->psmargsz);
858 p->ps->psmarg[0] = '\0';
859 }
860
861 /*p->ps->pdfbytes = 0;*/
862 p->ps->psmargcur = 0;
863 p->ps->flags = PS_MARGINS;
864 p->ps->pscol = p->ps->left;
865 p->ps->psrow = p->ps->header;
866
867 ps_setfont(p, TERMFONT_NONE);
868
869 (*p->headf)(p, p->argf);
870 (*p->endline)(p);
871
872 p->ps->pscol = p->ps->left;
873 p->ps->psrow = p->ps->footer;
874
875 (*p->footf)(p, p->argf);
876 (*p->endline)(p);
877
878 p->ps->flags &= ~PS_MARGINS;
879
880 assert(0 == p->ps->flags);
881 assert(p->ps->psmarg);
882 assert('\0' != p->ps->psmarg[0]);
883
884 /*
885 * Print header and initialise page state. Following this,
886 * stuff gets printed to the screen, so make sure we're sane.
887 */
888
889 if (TERMTYPE_PS == p->type) {
890 ps_printf(p, "%%!PS-Adobe-3.0\n");
891 ps_printf(p, "%%%%DocumentData: Clean7Bit\n");
892 ps_printf(p, "%%%%Orientation: Portrait\n");
893 ps_printf(p, "%%%%Pages: (atend)\n");
894 ps_printf(p, "%%%%PageOrder: Ascend\n");
895 ps_printf(p, "%%%%DocumentMedia: "
896 "Default %zu %zu 0 () ()\n",
897 (size_t)AFM2PNT(p, p->ps->width),
898 (size_t)AFM2PNT(p, p->ps->height));
899 ps_printf(p, "%%%%DocumentNeededResources: font");
900
901 for (i = 0; i < (int)TERMFONT__MAX; i++)
902 ps_printf(p, " %s", fonts[i].name);
903
904 ps_printf(p, "\n%%%%EndComments\n");
905 } else {
906 ps_printf(p, "%%PDF-1.1\n");
907 pdf_obj(p, 1);
908 ps_printf(p, "<<\n");
909 ps_printf(p, ">>\n");
910 ps_printf(p, "endobj\n");
911
912 for (i = 0; i < (int)TERMFONT__MAX; i++) {
913 pdf_obj(p, (size_t)i + 3);
914 ps_printf(p, "<<\n");
915 ps_printf(p, "/Type /Font\n");
916 ps_printf(p, "/Subtype /Type1\n");
917 ps_printf(p, "/Name /F%d\n", i);
918 ps_printf(p, "/BaseFont /%s\n", fonts[i].name);
919 ps_printf(p, ">>\n");
920 }
921 }
922
923 p->ps->pdfbody = (size_t)TERMFONT__MAX + 3;
924 p->ps->pscol = p->ps->left;
925 p->ps->psrow = p->ps->top;
926 p->ps->flags |= PS_NEWPAGE;
927 ps_setfont(p, TERMFONT_NONE);
928 }
929
930 static void
931 ps_pletter(struct termp *p, int c)
932 {
933 int f;
934
935 /*
936 * If we haven't opened a page context, then output that we're
937 * in a new page and make sure the font is correctly set.
938 */
939
940 if (PS_NEWPAGE & p->ps->flags) {
941 if (TERMTYPE_PS == p->type) {
942 ps_printf(p, "%%%%Page: %zu %zu\n",
943 p->ps->pages + 1, p->ps->pages + 1);
944 ps_printf(p, "/%s %zu selectfont\n",
945 fonts[(int)p->ps->lastf].name,
946 p->ps->scale);
947 } else {
948 pdf_obj(p, p->ps->pdfbody +
949 p->ps->pages * 4);
950 ps_printf(p, "<<\n");
951 ps_printf(p, "/Length %zu 0 R\n",
952 p->ps->pdfbody + 1 + p->ps->pages * 4);
953 ps_printf(p, ">>\nstream\n");
954 }
955 p->ps->pdflastpg = p->ps->pdfbytes;
956 p->ps->flags &= ~PS_NEWPAGE;
957 }
958
959 /*
960 * If we're not in a PostScript "word" context, then open one
961 * now at the current cursor.
962 */
963
964 if ( ! (PS_INLINE & p->ps->flags)) {
965 if (TERMTYPE_PS != p->type) {
966 ps_printf(p, "BT\n/F%d %zu Tf\n",
967 (int)p->ps->lastf, p->ps->scale);
968 ps_printf(p, "%.3f %.3f Td\n(",
969 AFM2PNT(p, p->ps->pscol),
970 AFM2PNT(p, p->ps->psrow));
971 } else
972 ps_printf(p, "%.3f %.3f moveto\n(",
973 AFM2PNT(p, p->ps->pscol),
974 AFM2PNT(p, p->ps->psrow));
975 p->ps->flags |= PS_INLINE;
976 }
977
978 assert( ! (PS_NEWPAGE & p->ps->flags));
979
980 /*
981 * We need to escape these characters as per the PostScript
982 * specification. We would also escape non-graphable characters
983 * (like tabs), but none of them would get to this point and
984 * it's superfluous to abort() on them.
985 */
986
987 switch (c) {
988 case '(':
989 case ')':
990 case '\\':
991 ps_putchar(p, '\\');
992 break;
993 default:
994 break;
995 }
996
997 /* Write the character and adjust where we are on the page. */
998
999 f = (int)p->ps->lastf;
1000
1001 if (c <= 32 || c - 32 >= MAXCHAR)
1002 c = 32;
1003
1004 ps_putchar(p, (char)c);
1005 c -= 32;
1006 p->ps->pscol += (size_t)fonts[f].gly[c].wx;
1007 }
1008
1009 static void
1010 ps_pclose(struct termp *p)
1011 {
1012
1013 /*
1014 * Spit out that we're exiting a word context (this is a
1015 * "partial close" because we don't check the last-char buffer
1016 * or anything).
1017 */
1018
1019 if ( ! (PS_INLINE & p->ps->flags))
1020 return;
1021
1022 if (TERMTYPE_PS != p->type) {
1023 ps_printf(p, ") Tj\nET\n");
1024 } else
1025 ps_printf(p, ") show\n");
1026
1027 p->ps->flags &= ~PS_INLINE;
1028 }
1029
1030 static void
1031 ps_fclose(struct termp *p)
1032 {
1033
1034 /*
1035 * Strong closure: if we have a last-char, spit it out after
1036 * checking that we're in the right font mode. This will of
1037 * course open a new scope, if applicable.
1038 *
1039 * Following this, close out any scope that's open.
1040 */
1041
1042 if (p->ps->last != '\0') {
1043 assert( ! (p->ps->flags & PS_BACKSP));
1044 if (p->ps->nextf != p->ps->lastf) {
1045 ps_pclose(p);
1046 ps_setfont(p, p->ps->nextf);
1047 }
1048 p->ps->nextf = TERMFONT_NONE;
1049 ps_pletter(p, p->ps->last);
1050 p->ps->last = '\0';
1051 }
1052
1053 if ( ! (PS_INLINE & p->ps->flags))
1054 return;
1055
1056 ps_pclose(p);
1057 }
1058
1059 static void
1060 ps_letter(struct termp *p, int arg)
1061 {
1062 size_t savecol, wx;
1063 char c;
1064
1065 c = arg >= 128 || arg <= 0 ? '?' : arg;
1066
1067 /*
1068 * When receiving a backspace, merely flag it.
1069 * We don't know yet whether it is
1070 * a font instruction or an overstrike.
1071 */
1072
1073 if (c == '\b') {
1074 assert(p->ps->last != '\0');
1075 assert( ! (p->ps->flags & PS_BACKSP));
1076 p->ps->flags |= PS_BACKSP;
1077 return;
1078 }
1079
1080 /*
1081 * Decode font instructions.
1082 */
1083
1084 if (p->ps->flags & PS_BACKSP) {
1085 if (p->ps->last == '_') {
1086 switch (p->ps->nextf) {
1087 case TERMFONT_BI:
1088 break;
1089 case TERMFONT_BOLD:
1090 p->ps->nextf = TERMFONT_BI;
1091 break;
1092 default:
1093 p->ps->nextf = TERMFONT_UNDER;
1094 }
1095 p->ps->last = c;
1096 p->ps->flags &= ~PS_BACKSP;
1097 return;
1098 }
1099 if (p->ps->last == c) {
1100 switch (p->ps->nextf) {
1101 case TERMFONT_BI:
1102 break;
1103 case TERMFONT_UNDER:
1104 p->ps->nextf = TERMFONT_BI;
1105 break;
1106 default:
1107 p->ps->nextf = TERMFONT_BOLD;
1108 }
1109 p->ps->flags &= ~PS_BACKSP;
1110 return;
1111 }
1112
1113 /*
1114 * This is not a font instruction, but rather
1115 * the next character. Prepare for overstrike.
1116 */
1117
1118 savecol = p->ps->pscol;
1119 } else
1120 savecol = SIZE_MAX;
1121
1122 /*
1123 * We found the next character, so the font instructions
1124 * for the previous one are complete.
1125 * Use them and print it.
1126 */
1127
1128 if (p->ps->last != '\0') {
1129 if (p->ps->nextf != p->ps->lastf) {
1130 ps_pclose(p);
1131 ps_setfont(p, p->ps->nextf);
1132 }
1133 p->ps->nextf = TERMFONT_NONE;
1134
1135 /*
1136 * For an overstrike, if a previous character
1137 * was wider, advance to center the new one.
1138 */
1139
1140 if (p->ps->pscolnext) {
1141 wx = fonts[p->ps->lastf].gly[(int)p->ps->last-32].wx;
1142 if (p->ps->pscol + wx < p->ps->pscolnext)
1143 p->ps->pscol = (p->ps->pscol +
1144 p->ps->pscolnext - wx) / 2;
1145 }
1146
1147 ps_pletter(p, p->ps->last);
1148
1149 /*
1150 * For an overstrike, if a previous character
1151 * was wider, advance to the end of the old one.
1152 */
1153
1154 if (p->ps->pscol < p->ps->pscolnext) {
1155 ps_pclose(p);
1156 p->ps->pscol = p->ps->pscolnext;
1157 }
1158 }
1159
1160 /*
1161 * Do not print the current character yet because font
1162 * instructions might follow; only remember it.
1163 * For the first character, nothing else is done.
1164 * The final character will get printed from ps_fclose().
1165 */
1166
1167 p->ps->last = c;
1168
1169 /*
1170 * For an overstrike, back up to the previous position.
1171 * If the previous character is wider than any it overstrikes,
1172 * remember the current position, because it might also be
1173 * wider than all that will overstrike it.
1174 */
1175
1176 if (savecol != SIZE_MAX) {
1177 if (p->ps->pscolnext < p->ps->pscol)
1178 p->ps->pscolnext = p->ps->pscol;
1179 ps_pclose(p);
1180 p->ps->pscol = savecol;
1181 p->ps->flags &= ~PS_BACKSP;
1182 } else
1183 p->ps->pscolnext = 0;
1184 }
1185
1186 static void
1187 ps_advance(struct termp *p, size_t len)
1188 {
1189
1190 /*
1191 * Advance some spaces. This can probably be made smarter,
1192 * i.e., to have multiple space-separated words in the same
1193 * scope, but this is easier: just close out the current scope
1194 * and readjust our column settings.
1195 */
1196
1197 ps_fclose(p);
1198 p->ps->pscol += len;
1199 }
1200
1201 static void
1202 ps_endline(struct termp *p)
1203 {
1204
1205 /* Close out any scopes we have open: we're at eoln. */
1206
1207 ps_fclose(p);
1208
1209 /*
1210 * If we're in the margin, don't try to recalculate our current
1211 * row. XXX: if the column tries to be fancy with multiple
1212 * lines, we'll do nasty stuff.
1213 */
1214
1215 if (PS_MARGINS & p->ps->flags)
1216 return;
1217
1218 /* Left-justify. */
1219
1220 p->ps->pscol = p->ps->left;
1221
1222 /* If we haven't printed anything, return. */
1223
1224 if (PS_NEWPAGE & p->ps->flags)
1225 return;
1226
1227 /*
1228 * Put us down a line. If we're at the page bottom, spit out a
1229 * showpage and restart our row.
1230 */
1231
1232 if (p->ps->psrow >= p->ps->lineheight + p->ps->bottom) {
1233 p->ps->psrow -= p->ps->lineheight;
1234 return;
1235 }
1236
1237 ps_closepage(p);
1238 }
1239
1240 static void
1241 ps_setfont(struct termp *p, enum termfont f)
1242 {
1243
1244 assert(f < TERMFONT__MAX);
1245 p->ps->lastf = f;
1246
1247 /*
1248 * If we're still at the top of the page, let the font-setting
1249 * be delayed until we actually have stuff to print.
1250 */
1251
1252 if (PS_NEWPAGE & p->ps->flags)
1253 return;
1254
1255 if (TERMTYPE_PS == p->type)
1256 ps_printf(p, "/%s %zu selectfont\n",
1257 fonts[(int)f].name, p->ps->scale);
1258 else
1259 ps_printf(p, "/F%d %zu Tf\n",
1260 (int)f, p->ps->scale);
1261 }
1262
1263 static size_t
1264 ps_width(const struct termp *p, int c)
1265 {
1266
1267 if (c <= 32 || c - 32 >= MAXCHAR)
1268 c = 0;
1269 else
1270 c -= 32;
1271
1272 return (size_t)fonts[(int)TERMFONT_NONE].gly[c].wx;
1273 }
1274
1275 static int
1276 ps_hspan(const struct termp *p, const struct roffsu *su)
1277 {
1278 double r;
1279
1280 /*
1281 * All of these measurements are derived by converting from the
1282 * native measurement to AFM units.
1283 */
1284 switch (su->unit) {
1285 case SCALE_BU:
1286 /*
1287 * Traditionally, the default unit is fixed to the
1288 * output media. So this would refer to the point. In
1289 * mandoc(1), however, we stick to the default terminal
1290 * scaling unit so that output is the same regardless
1291 * the media.
1292 */
1293 r = PNT2AFM(p, su->scale * 72.0 / 240.0);
1294 break;
1295 case SCALE_CM:
1296 r = PNT2AFM(p, su->scale * 72.0 / 2.54);
1297 break;
1298 case SCALE_EM:
1299 r = su->scale *
1300 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx;
1301 break;
1302 case SCALE_EN:
1303 r = su->scale *
1304 fonts[(int)TERMFONT_NONE].gly[110 - 32].wx;
1305 break;
1306 case SCALE_IN:
1307 r = PNT2AFM(p, su->scale * 72.0);
1308 break;
1309 case SCALE_MM:
1310 r = su->scale *
1311 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx / 100.0;
1312 break;
1313 case SCALE_PC:
1314 r = PNT2AFM(p, su->scale * 12.0);
1315 break;
1316 case SCALE_PT:
1317 r = PNT2AFM(p, su->scale * 1.0);
1318 break;
1319 case SCALE_VS:
1320 r = su->scale * p->ps->lineheight;
1321 break;
1322 default:
1323 r = su->scale;
1324 break;
1325 }
1326
1327 return r * 24.0;
1328 }
1329
1330 static void
1331 ps_growbuf(struct termp *p, size_t sz)
1332 {
1333 if (p->ps->psmargcur + sz <= p->ps->psmargsz)
1334 return;
1335
1336 if (sz < PS_BUFSLOP)
1337 sz = PS_BUFSLOP;
1338
1339 p->ps->psmargsz += sz;
1340 p->ps->psmarg = mandoc_realloc(p->ps->psmarg, p->ps->psmargsz);
1341 }
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