1 /* $OpenBSD: term_ps.c,v 1.56 2020/09/06 14:44:19 schwarze Exp $ */
2 /*
3 * Copyright (c) 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
4 * Copyright (c) 2014,2015,2016,2017,2020 Ingo Schwarze <schwarze@openbsd.org>
5 * Copyright (c) 2017 Marc Espie <espie@openbsd.org>
6 *
7 * Permission to use, copy, modify, and distribute this software for any
8 * purpose with or without fee is hereby granted, provided that the above
9 * copyright notice and this permission notice appear in all copies.
10 *
11 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHORS DISCLAIM ALL WARRANTIES
12 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
13 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR
14 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
15 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
16 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
17 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
18 */
19 #include <sys/types.h>
20
21 #include <assert.h>
22 #include <err.h>
23 #include <stdarg.h>
24 #include <stdint.h>
25 #include <stdio.h>
26 #include <stdlib.h>
27 #include <string.h>
28 #include <unistd.h>
29
30 #include "mandoc_aux.h"
31 #include "out.h"
32 #include "term.h"
33 #include "manconf.h"
34 #include "main.h"
35
36 /* These work the buffer used by the header and footer. */
37 #define PS_BUFSLOP 128
38
39 /* Convert PostScript point "x" to an AFM unit. */
40 #define PNT2AFM(p, x) \
41 (size_t)((double)(x) * (1000.0 / (double)(p)->ps->scale))
42
43 /* Convert an AFM unit "x" to a PostScript points */
44 #define AFM2PNT(p, x) \
45 ((double)(x) / (1000.0 / (double)(p)->ps->scale))
46
47 struct glyph {
48 unsigned short wx; /* WX in AFM */
49 };
50
51 struct font {
52 const char *name; /* FontName in AFM */
53 #define MAXCHAR 95 /* total characters we can handle */
54 struct glyph gly[MAXCHAR]; /* glyph metrics */
55 };
56
57 struct termp_ps {
58 int flags;
59 #define PS_INLINE (1 << 0) /* we're in a word */
60 #define PS_MARGINS (1 << 1) /* we're in the margins */
61 #define PS_NEWPAGE (1 << 2) /* new page, no words yet */
62 #define PS_BACKSP (1 << 3) /* last character was backspace */
63 size_t pscol; /* visible column (AFM units) */
64 size_t pscolnext; /* used for overstrike */
65 size_t psrow; /* visible row (AFM units) */
66 size_t lastrow; /* psrow of the previous word */
67 char *psmarg; /* margin buf */
68 size_t psmargsz; /* margin buf size */
69 size_t psmargcur; /* cur index in margin buf */
70 char last; /* last non-backspace seen */
71 enum termfont lastf; /* last set font */
72 enum termfont nextf; /* building next font here */
73 size_t scale; /* font scaling factor */
74 size_t pages; /* number of pages shown */
75 size_t lineheight; /* line height (AFM units) */
76 size_t top; /* body top (AFM units) */
77 size_t bottom; /* body bottom (AFM units) */
78 const char *medianame; /* for DocumentMedia and PageSize */
79 size_t height; /* page height (AFM units */
80 size_t width; /* page width (AFM units) */
81 size_t lastwidth; /* page width before last ll */
82 size_t left; /* body left (AFM units) */
83 size_t header; /* header pos (AFM units) */
84 size_t footer; /* footer pos (AFM units) */
85 size_t pdfbytes; /* current output byte */
86 size_t pdflastpg; /* byte of last page mark */
87 size_t pdfbody; /* start of body object */
88 size_t *pdfobjs; /* table of object offsets */
89 size_t pdfobjsz; /* size of pdfobjs */
90 };
91
92 static int ps_hspan(const struct termp *,
93 const struct roffsu *);
94 static size_t ps_width(const struct termp *, int);
95 static void ps_advance(struct termp *, size_t);
96 static void ps_begin(struct termp *);
97 static void ps_closepage(struct termp *);
98 static void ps_end(struct termp *);
99 static void ps_endline(struct termp *);
100 static void ps_growbuf(struct termp *, size_t);
101 static void ps_letter(struct termp *, int);
102 static void ps_pclose(struct termp *);
103 static void ps_plast(struct termp *);
104 static void ps_pletter(struct termp *, int);
105 static void ps_printf(struct termp *, const char *, ...)
106 __attribute__((__format__ (__printf__, 2, 3)));
107 static void ps_putchar(struct termp *, char);
108 static void ps_setfont(struct termp *, enum termfont);
109 static void ps_setwidth(struct termp *, int, int);
110 static struct termp *pspdf_alloc(const struct manoutput *, enum termtype);
111 static void pdf_obj(struct termp *, size_t);
112
113 /*
114 * We define, for the time being, three fonts: bold, oblique/italic, and
115 * normal (roman). The following table hard-codes the font metrics for
116 * ASCII, i.e., 32--127.
117 */
118
119 static const struct font fonts[TERMFONT__MAX] = {
120 { "Times-Roman", {
121 { 250 },
122 { 333 },
123 { 408 },
124 { 500 },
125 { 500 },
126 { 833 },
127 { 778 },
128 { 333 },
129 { 333 },
130 { 333 },
131 { 500 },
132 { 564 },
133 { 250 },
134 { 333 },
135 { 250 },
136 { 278 },
137 { 500 },
138 { 500 },
139 { 500 },
140 { 500 },
141 { 500 },
142 { 500 },
143 { 500 },
144 { 500 },
145 { 500 },
146 { 500 },
147 { 278 },
148 { 278 },
149 { 564 },
150 { 564 },
151 { 564 },
152 { 444 },
153 { 921 },
154 { 722 },
155 { 667 },
156 { 667 },
157 { 722 },
158 { 611 },
159 { 556 },
160 { 722 },
161 { 722 },
162 { 333 },
163 { 389 },
164 { 722 },
165 { 611 },
166 { 889 },
167 { 722 },
168 { 722 },
169 { 556 },
170 { 722 },
171 { 667 },
172 { 556 },
173 { 611 },
174 { 722 },
175 { 722 },
176 { 944 },
177 { 722 },
178 { 722 },
179 { 611 },
180 { 333 },
181 { 278 },
182 { 333 },
183 { 469 },
184 { 500 },
185 { 333 },
186 { 444 },
187 { 500 },
188 { 444 },
189 { 500},
190 { 444},
191 { 333},
192 { 500},
193 { 500},
194 { 278},
195 { 278},
196 { 500},
197 { 278},
198 { 778},
199 { 500},
200 { 500},
201 { 500},
202 { 500},
203 { 333},
204 { 389},
205 { 278},
206 { 500},
207 { 500},
208 { 722},
209 { 500},
210 { 500},
211 { 444},
212 { 480},
213 { 200},
214 { 480},
215 { 541},
216 } },
217 { "Times-Bold", {
218 { 250 },
219 { 333 },
220 { 555 },
221 { 500 },
222 { 500 },
223 { 1000 },
224 { 833 },
225 { 333 },
226 { 333 },
227 { 333 },
228 { 500 },
229 { 570 },
230 { 250 },
231 { 333 },
232 { 250 },
233 { 278 },
234 { 500 },
235 { 500 },
236 { 500 },
237 { 500 },
238 { 500 },
239 { 500 },
240 { 500 },
241 { 500 },
242 { 500 },
243 { 500 },
244 { 333 },
245 { 333 },
246 { 570 },
247 { 570 },
248 { 570 },
249 { 500 },
250 { 930 },
251 { 722 },
252 { 667 },
253 { 722 },
254 { 722 },
255 { 667 },
256 { 611 },
257 { 778 },
258 { 778 },
259 { 389 },
260 { 500 },
261 { 778 },
262 { 667 },
263 { 944 },
264 { 722 },
265 { 778 },
266 { 611 },
267 { 778 },
268 { 722 },
269 { 556 },
270 { 667 },
271 { 722 },
272 { 722 },
273 { 1000 },
274 { 722 },
275 { 722 },
276 { 667 },
277 { 333 },
278 { 278 },
279 { 333 },
280 { 581 },
281 { 500 },
282 { 333 },
283 { 500 },
284 { 556 },
285 { 444 },
286 { 556 },
287 { 444 },
288 { 333 },
289 { 500 },
290 { 556 },
291 { 278 },
292 { 333 },
293 { 556 },
294 { 278 },
295 { 833 },
296 { 556 },
297 { 500 },
298 { 556 },
299 { 556 },
300 { 444 },
301 { 389 },
302 { 333 },
303 { 556 },
304 { 500 },
305 { 722 },
306 { 500 },
307 { 500 },
308 { 444 },
309 { 394 },
310 { 220 },
311 { 394 },
312 { 520 },
313 } },
314 { "Times-Italic", {
315 { 250 },
316 { 333 },
317 { 420 },
318 { 500 },
319 { 500 },
320 { 833 },
321 { 778 },
322 { 333 },
323 { 333 },
324 { 333 },
325 { 500 },
326 { 675 },
327 { 250 },
328 { 333 },
329 { 250 },
330 { 278 },
331 { 500 },
332 { 500 },
333 { 500 },
334 { 500 },
335 { 500 },
336 { 500 },
337 { 500 },
338 { 500 },
339 { 500 },
340 { 500 },
341 { 333 },
342 { 333 },
343 { 675 },
344 { 675 },
345 { 675 },
346 { 500 },
347 { 920 },
348 { 611 },
349 { 611 },
350 { 667 },
351 { 722 },
352 { 611 },
353 { 611 },
354 { 722 },
355 { 722 },
356 { 333 },
357 { 444 },
358 { 667 },
359 { 556 },
360 { 833 },
361 { 667 },
362 { 722 },
363 { 611 },
364 { 722 },
365 { 611 },
366 { 500 },
367 { 556 },
368 { 722 },
369 { 611 },
370 { 833 },
371 { 611 },
372 { 556 },
373 { 556 },
374 { 389 },
375 { 278 },
376 { 389 },
377 { 422 },
378 { 500 },
379 { 333 },
380 { 500 },
381 { 500 },
382 { 444 },
383 { 500 },
384 { 444 },
385 { 278 },
386 { 500 },
387 { 500 },
388 { 278 },
389 { 278 },
390 { 444 },
391 { 278 },
392 { 722 },
393 { 500 },
394 { 500 },
395 { 500 },
396 { 500 },
397 { 389 },
398 { 389 },
399 { 278 },
400 { 500 },
401 { 444 },
402 { 667 },
403 { 444 },
404 { 444 },
405 { 389 },
406 { 400 },
407 { 275 },
408 { 400 },
409 { 541 },
410 } },
411 { "Times-BoldItalic", {
412 { 250 },
413 { 389 },
414 { 555 },
415 { 500 },
416 { 500 },
417 { 833 },
418 { 778 },
419 { 333 },
420 { 333 },
421 { 333 },
422 { 500 },
423 { 570 },
424 { 250 },
425 { 333 },
426 { 250 },
427 { 278 },
428 { 500 },
429 { 500 },
430 { 500 },
431 { 500 },
432 { 500 },
433 { 500 },
434 { 500 },
435 { 500 },
436 { 500 },
437 { 500 },
438 { 333 },
439 { 333 },
440 { 570 },
441 { 570 },
442 { 570 },
443 { 500 },
444 { 832 },
445 { 667 },
446 { 667 },
447 { 667 },
448 { 722 },
449 { 667 },
450 { 667 },
451 { 722 },
452 { 778 },
453 { 389 },
454 { 500 },
455 { 667 },
456 { 611 },
457 { 889 },
458 { 722 },
459 { 722 },
460 { 611 },
461 { 722 },
462 { 667 },
463 { 556 },
464 { 611 },
465 { 722 },
466 { 667 },
467 { 889 },
468 { 667 },
469 { 611 },
470 { 611 },
471 { 333 },
472 { 278 },
473 { 333 },
474 { 570 },
475 { 500 },
476 { 333 },
477 { 500 },
478 { 500 },
479 { 444 },
480 { 500 },
481 { 444 },
482 { 333 },
483 { 500 },
484 { 556 },
485 { 278 },
486 { 278 },
487 { 500 },
488 { 278 },
489 { 778 },
490 { 556 },
491 { 500 },
492 { 500 },
493 { 500 },
494 { 389 },
495 { 389 },
496 { 278 },
497 { 556 },
498 { 444 },
499 { 667 },
500 { 500 },
501 { 444 },
502 { 389 },
503 { 348 },
504 { 220 },
505 { 348 },
506 { 570 },
507 } },
508 };
509
510 void *
pdf_alloc(const struct manoutput * outopts)511 pdf_alloc(const struct manoutput *outopts)
512 {
513 return pspdf_alloc(outopts, TERMTYPE_PDF);
514 }
515
516 void *
ps_alloc(const struct manoutput * outopts)517 ps_alloc(const struct manoutput *outopts)
518 {
519 return pspdf_alloc(outopts, TERMTYPE_PS);
520 }
521
522 static struct termp *
pspdf_alloc(const struct manoutput * outopts,enum termtype type)523 pspdf_alloc(const struct manoutput *outopts, enum termtype type)
524 {
525 struct termp *p;
526 unsigned int pagex, pagey;
527 size_t marginx, marginy, lineheight;
528 const char *pp;
529
530 p = mandoc_calloc(1, sizeof(*p));
531 p->tcol = p->tcols = mandoc_calloc(1, sizeof(*p->tcol));
532 p->maxtcol = 1;
533 p->type = type;
534
535 p->enc = TERMENC_ASCII;
536 p->fontq = mandoc_reallocarray(NULL,
537 (p->fontsz = 8), sizeof(*p->fontq));
538 p->fontq[0] = p->fontl = TERMFONT_NONE;
539 p->ps = mandoc_calloc(1, sizeof(*p->ps));
540
541 p->advance = ps_advance;
542 p->begin = ps_begin;
543 p->end = ps_end;
544 p->endline = ps_endline;
545 p->hspan = ps_hspan;
546 p->letter = ps_letter;
547 p->setwidth = ps_setwidth;
548 p->width = ps_width;
549
550 /* Default to US letter (millimetres). */
551
552 p->ps->medianame = "Letter";
553 pagex = 216;
554 pagey = 279;
555
556 /*
557 * The ISO-269 paper sizes can be calculated automatically, but
558 * it would require bringing in -lm for pow() and I'd rather not
559 * do that. So just do it the easy way for now. Since this
560 * only happens once, I'm not terribly concerned.
561 */
562
563 pp = outopts->paper;
564 if (pp != NULL && strcasecmp(pp, "letter") != 0) {
565 if (strcasecmp(pp, "a3") == 0) {
566 p->ps->medianame = "A3";
567 pagex = 297;
568 pagey = 420;
569 } else if (strcasecmp(pp, "a4") == 0) {
570 p->ps->medianame = "A4";
571 pagex = 210;
572 pagey = 297;
573 } else if (strcasecmp(pp, "a5") == 0) {
574 p->ps->medianame = "A5";
575 pagex = 148;
576 pagey = 210;
577 } else if (strcasecmp(pp, "legal") == 0) {
578 p->ps->medianame = "Legal";
579 pagex = 216;
580 pagey = 356;
581 } else if (sscanf(pp, "%ux%u", &pagex, &pagey) == 2)
582 p->ps->medianame = "CustomSize";
583 else
584 warnx("%s: Unknown paper", pp);
585 }
586
587 /*
588 * This MUST be defined before any PNT2AFM or AFM2PNT
589 * calculations occur.
590 */
591
592 p->ps->scale = 11;
593
594 /* Remember millimetres -> AFM units. */
595
596 pagex = PNT2AFM(p, ((double)pagex * 72.0 / 25.4));
597 pagey = PNT2AFM(p, ((double)pagey * 72.0 / 25.4));
598
599 /* Margins are 1/9 the page x and y. */
600
601 marginx = (size_t)((double)pagex / 9.0);
602 marginy = (size_t)((double)pagey / 9.0);
603
604 /* Line-height is 1.4em. */
605
606 lineheight = PNT2AFM(p, ((double)p->ps->scale * 1.4));
607
608 p->ps->width = p->ps->lastwidth = (size_t)pagex;
609 p->ps->height = (size_t)pagey;
610 p->ps->header = pagey - (marginy / 2) - (lineheight / 2);
611 p->ps->top = pagey - marginy;
612 p->ps->footer = (marginy / 2) - (lineheight / 2);
613 p->ps->bottom = marginy;
614 p->ps->left = marginx;
615 p->ps->lineheight = lineheight;
616
617 p->defrmargin = pagex - (marginx * 2);
618 return p;
619 }
620
621 static void
ps_setwidth(struct termp * p,int iop,int width)622 ps_setwidth(struct termp *p, int iop, int width)
623 {
624 size_t lastwidth;
625
626 lastwidth = p->ps->width;
627 if (iop > 0)
628 p->ps->width += width;
629 else if (iop == 0)
630 p->ps->width = width ? (size_t)width : p->ps->lastwidth;
631 else if (p->ps->width > (size_t)width)
632 p->ps->width -= width;
633 else
634 p->ps->width = 0;
635 p->ps->lastwidth = lastwidth;
636 }
637
638 void
pspdf_free(void * arg)639 pspdf_free(void *arg)
640 {
641 struct termp *p;
642
643 p = (struct termp *)arg;
644
645 free(p->ps->psmarg);
646 free(p->ps->pdfobjs);
647
648 free(p->ps);
649 term_free(p);
650 }
651
652 static void
ps_printf(struct termp * p,const char * fmt,...)653 ps_printf(struct termp *p, const char *fmt, ...)
654 {
655 va_list ap;
656 int pos, len;
657
658 va_start(ap, fmt);
659
660 /*
661 * If we're running in regular mode, then pipe directly into
662 * vprintf(). If we're processing margins, then push the data
663 * into our growable margin buffer.
664 */
665
666 if ( ! (PS_MARGINS & p->ps->flags)) {
667 len = vprintf(fmt, ap);
668 va_end(ap);
669 p->ps->pdfbytes += len < 0 ? 0 : (size_t)len;
670 return;
671 }
672
673 /*
674 * XXX: I assume that the in-margin print won't exceed
675 * PS_BUFSLOP (128 bytes), which is reasonable but still an
676 * assumption that will cause pukeage if it's not the case.
677 */
678
679 ps_growbuf(p, PS_BUFSLOP);
680
681 pos = (int)p->ps->psmargcur;
682 vsnprintf(&p->ps->psmarg[pos], PS_BUFSLOP, fmt, ap);
683
684 va_end(ap);
685
686 p->ps->psmargcur = strlen(p->ps->psmarg);
687 }
688
689 static void
ps_putchar(struct termp * p,char c)690 ps_putchar(struct termp *p, char c)
691 {
692 int pos;
693
694 /* See ps_printf(). */
695
696 if ( ! (PS_MARGINS & p->ps->flags)) {
697 putchar(c);
698 p->ps->pdfbytes++;
699 return;
700 }
701
702 ps_growbuf(p, 2);
703
704 pos = (int)p->ps->psmargcur++;
705 p->ps->psmarg[pos++] = c;
706 p->ps->psmarg[pos] = '\0';
707 }
708
709 static void
pdf_obj(struct termp * p,size_t obj)710 pdf_obj(struct termp *p, size_t obj)
711 {
712
713 assert(obj > 0);
714
715 if ((obj - 1) >= p->ps->pdfobjsz) {
716 p->ps->pdfobjsz = obj + 128;
717 p->ps->pdfobjs = mandoc_reallocarray(p->ps->pdfobjs,
718 p->ps->pdfobjsz, sizeof(size_t));
719 }
720
721 p->ps->pdfobjs[(int)obj - 1] = p->ps->pdfbytes;
722 ps_printf(p, "%zu 0 obj\n", obj);
723 }
724
725 static void
ps_closepage(struct termp * p)726 ps_closepage(struct termp *p)
727 {
728 int i;
729 size_t len, base;
730
731 /*
732 * Close out a page that we've already flushed to output. In
733 * PostScript, we simply note that the page must be shown. In
734 * PDF, we must now create the Length, Resource, and Page node
735 * for the page contents.
736 */
737
738 assert(p->ps->psmarg && p->ps->psmarg[0]);
739 ps_printf(p, "%s", p->ps->psmarg);
740
741 if (TERMTYPE_PS != p->type) {
742 len = p->ps->pdfbytes - p->ps->pdflastpg;
743 base = p->ps->pages * 4 + p->ps->pdfbody;
744
745 ps_printf(p, "endstream\nendobj\n");
746
747 /* Length of content. */
748 pdf_obj(p, base + 1);
749 ps_printf(p, "%zu\nendobj\n", len);
750
751 /* Resource for content. */
752 pdf_obj(p, base + 2);
753 ps_printf(p, "<<\n/ProcSet [/PDF /Text]\n");
754 ps_printf(p, "/Font <<\n");
755 for (i = 0; i < (int)TERMFONT__MAX; i++)
756 ps_printf(p, "/F%d %d 0 R\n", i, 3 + i);
757 ps_printf(p, ">>\n>>\nendobj\n");
758
759 /* Page node. */
760 pdf_obj(p, base + 3);
761 ps_printf(p, "<<\n");
762 ps_printf(p, "/Type /Page\n");
763 ps_printf(p, "/Parent 2 0 R\n");
764 ps_printf(p, "/Resources %zu 0 R\n", base + 2);
765 ps_printf(p, "/Contents %zu 0 R\n", base);
766 ps_printf(p, ">>\nendobj\n");
767 } else
768 ps_printf(p, "showpage\n");
769
770 p->ps->pages++;
771 p->ps->psrow = p->ps->top;
772 assert( ! (PS_NEWPAGE & p->ps->flags));
773 p->ps->flags |= PS_NEWPAGE;
774 }
775
776 static void
ps_end(struct termp * p)777 ps_end(struct termp *p)
778 {
779 size_t i, xref, base;
780
781 ps_plast(p);
782 ps_pclose(p);
783
784 /*
785 * At the end of the file, do one last showpage. This is the
786 * same behaviour as groff(1) and works for multiple pages as
787 * well as just one.
788 */
789
790 if ( ! (PS_NEWPAGE & p->ps->flags)) {
791 assert(0 == p->ps->flags);
792 assert('\0' == p->ps->last);
793 ps_closepage(p);
794 }
795
796 if (TERMTYPE_PS == p->type) {
797 ps_printf(p, "%%%%Trailer\n");
798 ps_printf(p, "%%%%Pages: %zu\n", p->ps->pages);
799 ps_printf(p, "%%%%EOF\n");
800 return;
801 }
802
803 pdf_obj(p, 2);
804 ps_printf(p, "<<\n/Type /Pages\n");
805 ps_printf(p, "/MediaBox [0 0 %zu %zu]\n",
806 (size_t)AFM2PNT(p, p->ps->width),
807 (size_t)AFM2PNT(p, p->ps->height));
808
809 ps_printf(p, "/Count %zu\n", p->ps->pages);
810 ps_printf(p, "/Kids [");
811
812 for (i = 0; i < p->ps->pages; i++)
813 ps_printf(p, " %zu 0 R", i * 4 + p->ps->pdfbody + 3);
814
815 base = (p->ps->pages - 1) * 4 + p->ps->pdfbody + 4;
816
817 ps_printf(p, "]\n>>\nendobj\n");
818 pdf_obj(p, base);
819 ps_printf(p, "<<\n");
820 ps_printf(p, "/Type /Catalog\n");
821 ps_printf(p, "/Pages 2 0 R\n");
822 ps_printf(p, ">>\nendobj\n");
823 xref = p->ps->pdfbytes;
824 ps_printf(p, "xref\n");
825 ps_printf(p, "0 %zu\n", base + 1);
826 ps_printf(p, "0000000000 65535 f \n");
827
828 for (i = 0; i < base; i++)
829 ps_printf(p, "%.10zu 00000 n \n",
830 p->ps->pdfobjs[(int)i]);
831
832 ps_printf(p, "trailer\n");
833 ps_printf(p, "<<\n");
834 ps_printf(p, "/Size %zu\n", base + 1);
835 ps_printf(p, "/Root %zu 0 R\n", base);
836 ps_printf(p, "/Info 1 0 R\n");
837 ps_printf(p, ">>\n");
838 ps_printf(p, "startxref\n");
839 ps_printf(p, "%zu\n", xref);
840 ps_printf(p, "%%%%EOF\n");
841 }
842
843 static void
ps_begin(struct termp * p)844 ps_begin(struct termp *p)
845 {
846 size_t width, height;
847 int i;
848
849 /*
850 * Print margins into margin buffer. Nothing gets output to the
851 * screen yet, so we don't need to initialise the primary state.
852 */
853
854 if (p->ps->psmarg) {
855 assert(p->ps->psmargsz);
856 p->ps->psmarg[0] = '\0';
857 }
858
859 /*p->ps->pdfbytes = 0;*/
860 p->ps->psmargcur = 0;
861 p->ps->flags = PS_MARGINS;
862 p->ps->pscol = p->ps->left;
863 p->ps->psrow = p->ps->header;
864 p->ps->lastrow = 0; /* impossible row */
865
866 ps_setfont(p, TERMFONT_NONE);
867
868 (*p->headf)(p, p->argf);
869 (*p->endline)(p);
870
871 p->ps->pscol = p->ps->left;
872 p->ps->psrow = p->ps->footer;
873
874 (*p->footf)(p, p->argf);
875 (*p->endline)(p);
876
877 p->ps->flags &= ~PS_MARGINS;
878
879 assert(0 == p->ps->flags);
880 assert(p->ps->psmarg);
881 assert('\0' != p->ps->psmarg[0]);
882
883 /*
884 * Print header and initialise page state. Following this,
885 * stuff gets printed to the screen, so make sure we're sane.
886 */
887
888 if (TERMTYPE_PS == p->type) {
889 width = AFM2PNT(p, p->ps->width);
890 height = AFM2PNT(p, p->ps->height);
891
892 ps_printf(p, "%%!PS-Adobe-3.0\n");
893 ps_printf(p, "%%%%DocumentData: Clean7Bit\n");
894 ps_printf(p, "%%%%Orientation: Portrait\n");
895 ps_printf(p, "%%%%Pages: (atend)\n");
896 ps_printf(p, "%%%%PageOrder: Ascend\n");
897 ps_printf(p, "%%%%DocumentMedia: man-%s %zu %zu 0 () ()\n",
898 p->ps->medianame, width, 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%%%%DocumentSuppliedResources: "
905 "procset MandocProcs 1.0 0\n");
906 ps_printf(p, "%%%%EndComments\n");
907 ps_printf(p, "%%%%BeginProlog\n");
908 ps_printf(p, "%%%%BeginResource: procset MandocProcs "
909 "10170 10170\n");
910 /* The font size is effectively hard-coded for now. */
911 ps_printf(p, "/fs %zu def\n", p->ps->scale);
912 for (i = 0; i < (int)TERMFONT__MAX; i++)
913 ps_printf(p, "/f%d { /%s fs selectfont } def\n",
914 i, fonts[i].name);
915 ps_printf(p, "/s { 3 1 roll moveto show } bind def\n");
916 ps_printf(p, "/c { exch currentpoint exch pop "
917 "moveto show } bind def\n");
918 ps_printf(p, "%%%%EndResource\n");
919 ps_printf(p, "%%%%EndProlog\n");
920 ps_printf(p, "%%%%BeginSetup\n");
921 ps_printf(p, "%%%%BeginFeature: *PageSize %s\n",
922 p->ps->medianame);
923 ps_printf(p, "<</PageSize [%zu %zu]>>setpagedevice\n",
924 width, height);
925 ps_printf(p, "%%%%EndFeature\n");
926 ps_printf(p, "%%%%EndSetup\n");
927 } else {
928 ps_printf(p, "%%PDF-1.1\n");
929 pdf_obj(p, 1);
930 ps_printf(p, "<<\n");
931 ps_printf(p, ">>\n");
932 ps_printf(p, "endobj\n");
933
934 for (i = 0; i < (int)TERMFONT__MAX; i++) {
935 pdf_obj(p, (size_t)i + 3);
936 ps_printf(p, "<<\n");
937 ps_printf(p, "/Type /Font\n");
938 ps_printf(p, "/Subtype /Type1\n");
939 ps_printf(p, "/Name /F%d\n", i);
940 ps_printf(p, "/BaseFont /%s\n", fonts[i].name);
941 ps_printf(p, ">>\nendobj\n");
942 }
943 }
944
945 p->ps->pdfbody = (size_t)TERMFONT__MAX + 3;
946 p->ps->pscol = p->ps->left;
947 p->ps->psrow = p->ps->top;
948 p->ps->flags |= PS_NEWPAGE;
949 ps_setfont(p, TERMFONT_NONE);
950 }
951
952 static void
ps_pletter(struct termp * p,int c)953 ps_pletter(struct termp *p, int c)
954 {
955 int f;
956
957 /*
958 * If we haven't opened a page context, then output that we're
959 * in a new page and make sure the font is correctly set.
960 */
961
962 if (PS_NEWPAGE & p->ps->flags) {
963 if (TERMTYPE_PS == p->type) {
964 ps_printf(p, "%%%%Page: %zu %zu\n",
965 p->ps->pages + 1, p->ps->pages + 1);
966 ps_printf(p, "f%d\n", (int)p->ps->lastf);
967 } else {
968 pdf_obj(p, p->ps->pdfbody +
969 p->ps->pages * 4);
970 ps_printf(p, "<<\n");
971 ps_printf(p, "/Length %zu 0 R\n",
972 p->ps->pdfbody + 1 + p->ps->pages * 4);
973 ps_printf(p, ">>\nstream\n");
974 }
975 p->ps->pdflastpg = p->ps->pdfbytes;
976 p->ps->flags &= ~PS_NEWPAGE;
977 }
978
979 /*
980 * If we're not in a PostScript "word" context, then open one
981 * now at the current cursor.
982 */
983
984 if ( ! (PS_INLINE & p->ps->flags)) {
985 if (TERMTYPE_PS != p->type) {
986 ps_printf(p, "BT\n/F%d %zu Tf\n",
987 (int)p->ps->lastf, p->ps->scale);
988 ps_printf(p, "%.3f %.3f Td\n(",
989 AFM2PNT(p, p->ps->pscol),
990 AFM2PNT(p, p->ps->psrow));
991 } else {
992 ps_printf(p, "%.3f", AFM2PNT(p, p->ps->pscol));
993 if (p->ps->psrow != p->ps->lastrow)
994 ps_printf(p, " %.3f",
995 AFM2PNT(p, p->ps->psrow));
996 ps_printf(p, "(");
997 }
998 p->ps->flags |= PS_INLINE;
999 }
1000
1001 assert( ! (PS_NEWPAGE & p->ps->flags));
1002
1003 /*
1004 * We need to escape these characters as per the PostScript
1005 * specification. We would also escape non-graphable characters
1006 * (like tabs), but none of them would get to this point and
1007 * it's superfluous to abort() on them.
1008 */
1009
1010 switch (c) {
1011 case '(':
1012 case ')':
1013 case '\\':
1014 ps_putchar(p, '\\');
1015 break;
1016 default:
1017 break;
1018 }
1019
1020 /* Write the character and adjust where we are on the page. */
1021
1022 f = (int)p->ps->lastf;
1023
1024 if (c <= 32 || c - 32 >= MAXCHAR)
1025 c = 32;
1026
1027 ps_putchar(p, (char)c);
1028 c -= 32;
1029 p->ps->pscol += (size_t)fonts[f].gly[c].wx;
1030 }
1031
1032 static void
ps_pclose(struct termp * p)1033 ps_pclose(struct termp *p)
1034 {
1035
1036 /*
1037 * Spit out that we're exiting a word context (this is a
1038 * "partial close" because we don't check the last-char buffer
1039 * or anything).
1040 */
1041
1042 if ( ! (PS_INLINE & p->ps->flags))
1043 return;
1044
1045 if (TERMTYPE_PS != p->type)
1046 ps_printf(p, ") Tj\nET\n");
1047 else if (p->ps->psrow == p->ps->lastrow)
1048 ps_printf(p, ")c\n");
1049 else {
1050 ps_printf(p, ")s\n");
1051 p->ps->lastrow = p->ps->psrow;
1052 }
1053
1054 p->ps->flags &= ~PS_INLINE;
1055 }
1056
1057 /* If we have a `last' char that wasn't printed yet, print it now. */
1058 static void
ps_plast(struct termp * p)1059 ps_plast(struct termp *p)
1060 {
1061 size_t wx;
1062
1063 if (p->ps->last == '\0')
1064 return;
1065
1066 /* Check the font mode; open a new scope if it doesn't match. */
1067
1068 if (p->ps->nextf != p->ps->lastf) {
1069 ps_pclose(p);
1070 ps_setfont(p, p->ps->nextf);
1071 }
1072 p->ps->nextf = TERMFONT_NONE;
1073
1074 /*
1075 * For an overstrike, if a previous character
1076 * was wider, advance to center the new one.
1077 */
1078
1079 if (p->ps->pscolnext) {
1080 wx = fonts[p->ps->lastf].gly[(int)p->ps->last-32].wx;
1081 if (p->ps->pscol + wx < p->ps->pscolnext)
1082 p->ps->pscol = (p->ps->pscol +
1083 p->ps->pscolnext - wx) / 2;
1084 }
1085
1086 ps_pletter(p, p->ps->last);
1087 p->ps->last = '\0';
1088
1089 /*
1090 * For an overstrike, if a previous character
1091 * was wider, advance to the end of the old one.
1092 */
1093
1094 if (p->ps->pscol < p->ps->pscolnext) {
1095 ps_pclose(p);
1096 p->ps->pscol = p->ps->pscolnext;
1097 }
1098 }
1099
1100 static void
ps_letter(struct termp * p,int arg)1101 ps_letter(struct termp *p, int arg)
1102 {
1103 size_t savecol;
1104 char c;
1105
1106 c = arg >= 128 || arg <= 0 ? '?' : arg;
1107
1108 /*
1109 * When receiving a backspace, merely flag it.
1110 * We don't know yet whether it is
1111 * a font instruction or an overstrike.
1112 */
1113
1114 if (c == '\b') {
1115 assert(p->ps->last != '\0');
1116 assert( ! (p->ps->flags & PS_BACKSP));
1117 p->ps->flags |= PS_BACKSP;
1118 return;
1119 }
1120
1121 /*
1122 * Decode font instructions.
1123 */
1124
1125 if (p->ps->flags & PS_BACKSP) {
1126 if (p->ps->last == '_') {
1127 switch (p->ps->nextf) {
1128 case TERMFONT_BI:
1129 break;
1130 case TERMFONT_BOLD:
1131 p->ps->nextf = TERMFONT_BI;
1132 break;
1133 default:
1134 p->ps->nextf = TERMFONT_UNDER;
1135 }
1136 p->ps->last = c;
1137 p->ps->flags &= ~PS_BACKSP;
1138 return;
1139 }
1140 if (p->ps->last == c) {
1141 switch (p->ps->nextf) {
1142 case TERMFONT_BI:
1143 break;
1144 case TERMFONT_UNDER:
1145 p->ps->nextf = TERMFONT_BI;
1146 break;
1147 default:
1148 p->ps->nextf = TERMFONT_BOLD;
1149 }
1150 p->ps->flags &= ~PS_BACKSP;
1151 return;
1152 }
1153
1154 /*
1155 * This is not a font instruction, but rather
1156 * the next character. Prepare for overstrike.
1157 */
1158
1159 savecol = p->ps->pscol;
1160 } else
1161 savecol = SIZE_MAX;
1162
1163 /*
1164 * We found the next character, so the font instructions
1165 * for the previous one are complete.
1166 * Use them and print it.
1167 */
1168
1169 ps_plast(p);
1170
1171 /*
1172 * Do not print the current character yet because font
1173 * instructions might follow; only remember the character.
1174 * It will get printed later from ps_plast().
1175 */
1176
1177 p->ps->last = c;
1178
1179 /*
1180 * For an overstrike, back up to the previous position.
1181 * If the previous character is wider than any it overstrikes,
1182 * remember the current position, because it might also be
1183 * wider than all that will overstrike it.
1184 */
1185
1186 if (savecol != SIZE_MAX) {
1187 if (p->ps->pscolnext < p->ps->pscol)
1188 p->ps->pscolnext = p->ps->pscol;
1189 ps_pclose(p);
1190 p->ps->pscol = savecol;
1191 p->ps->flags &= ~PS_BACKSP;
1192 } else
1193 p->ps->pscolnext = 0;
1194 }
1195
1196 static void
ps_advance(struct termp * p,size_t len)1197 ps_advance(struct termp *p, size_t len)
1198 {
1199
1200 /*
1201 * Advance some spaces. This can probably be made smarter,
1202 * i.e., to have multiple space-separated words in the same
1203 * scope, but this is easier: just close out the current scope
1204 * and readjust our column settings.
1205 */
1206
1207 ps_plast(p);
1208 ps_pclose(p);
1209 p->ps->pscol += len;
1210 }
1211
1212 static void
ps_endline(struct termp * p)1213 ps_endline(struct termp *p)
1214 {
1215
1216 /* Close out any scopes we have open: we're at eoln. */
1217
1218 ps_plast(p);
1219 ps_pclose(p);
1220
1221 /*
1222 * If we're in the margin, don't try to recalculate our current
1223 * row. XXX: if the column tries to be fancy with multiple
1224 * lines, we'll do nasty stuff.
1225 */
1226
1227 if (PS_MARGINS & p->ps->flags)
1228 return;
1229
1230 /* Left-justify. */
1231
1232 p->ps->pscol = p->ps->left;
1233
1234 /* If we haven't printed anything, return. */
1235
1236 if (PS_NEWPAGE & p->ps->flags)
1237 return;
1238
1239 /*
1240 * Put us down a line. If we're at the page bottom, spit out a
1241 * showpage and restart our row.
1242 */
1243
1244 if (p->ps->psrow >= p->ps->lineheight + p->ps->bottom) {
1245 p->ps->psrow -= p->ps->lineheight;
1246 return;
1247 }
1248
1249 ps_closepage(p);
1250
1251 if ((int)p->tcol->offset > p->ti)
1252 p->tcol->offset -= p->ti;
1253 else
1254 p->tcol->offset = 0;
1255 p->ti = 0;
1256 }
1257
1258 static void
ps_setfont(struct termp * p,enum termfont f)1259 ps_setfont(struct termp *p, enum termfont f)
1260 {
1261
1262 assert(f < TERMFONT__MAX);
1263 p->ps->lastf = f;
1264
1265 /*
1266 * If we're still at the top of the page, let the font-setting
1267 * be delayed until we actually have stuff to print.
1268 */
1269
1270 if (PS_NEWPAGE & p->ps->flags)
1271 return;
1272
1273 if (TERMTYPE_PS == p->type)
1274 ps_printf(p, "f%d\n", (int)f);
1275 else
1276 ps_printf(p, "/F%d %zu Tf\n",
1277 (int)f, p->ps->scale);
1278 }
1279
1280 static size_t
ps_width(const struct termp * p,int c)1281 ps_width(const struct termp *p, int c)
1282 {
1283
1284 if (c <= 32 || c - 32 >= MAXCHAR)
1285 c = 0;
1286 else
1287 c -= 32;
1288
1289 return (size_t)fonts[(int)TERMFONT_NONE].gly[c].wx;
1290 }
1291
1292 static int
ps_hspan(const struct termp * p,const struct roffsu * su)1293 ps_hspan(const struct termp *p, const struct roffsu *su)
1294 {
1295 double r;
1296
1297 /*
1298 * All of these measurements are derived by converting from the
1299 * native measurement to AFM units.
1300 */
1301 switch (su->unit) {
1302 case SCALE_BU:
1303 /*
1304 * Traditionally, the default unit is fixed to the
1305 * output media. So this would refer to the point. In
1306 * mandoc(1), however, we stick to the default terminal
1307 * scaling unit so that output is the same regardless
1308 * the media.
1309 */
1310 r = PNT2AFM(p, su->scale * 72.0 / 240.0);
1311 break;
1312 case SCALE_CM:
1313 r = PNT2AFM(p, su->scale * 72.0 / 2.54);
1314 break;
1315 case SCALE_EM:
1316 r = su->scale *
1317 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx;
1318 break;
1319 case SCALE_EN:
1320 r = su->scale *
1321 fonts[(int)TERMFONT_NONE].gly[110 - 32].wx;
1322 break;
1323 case SCALE_IN:
1324 r = PNT2AFM(p, su->scale * 72.0);
1325 break;
1326 case SCALE_MM:
1327 r = su->scale *
1328 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx / 100.0;
1329 break;
1330 case SCALE_PC:
1331 r = PNT2AFM(p, su->scale * 12.0);
1332 break;
1333 case SCALE_PT:
1334 r = PNT2AFM(p, su->scale * 1.0);
1335 break;
1336 case SCALE_VS:
1337 r = su->scale * p->ps->lineheight;
1338 break;
1339 default:
1340 r = su->scale;
1341 break;
1342 }
1343
1344 return r * 24.0;
1345 }
1346
1347 static void
ps_growbuf(struct termp * p,size_t sz)1348 ps_growbuf(struct termp *p, size_t sz)
1349 {
1350 if (p->ps->psmargcur + sz <= p->ps->psmargsz)
1351 return;
1352
1353 if (sz < PS_BUFSLOP)
1354 sz = PS_BUFSLOP;
1355
1356 p->ps->psmargsz += sz;
1357 p->ps->psmarg = mandoc_realloc(p->ps->psmarg, p->ps->psmargsz);
1358 }
1359