1 /* $Id: term_ps.c,v 1.92 2020/09/06 14:45:22 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 "config.h"
20
21 #include <sys/types.h>
22
23 #include <assert.h>
24 #if HAVE_ERR
25 #include <err.h>
26 #endif
27 #include <stdarg.h>
28 #include <stdint.h>
29 #include <stdio.h>
30 #include <stdlib.h>
31 #include <string.h>
32 #include <unistd.h>
33
34 #include "mandoc_aux.h"
35 #include "out.h"
36 #include "term.h"
37 #include "manconf.h"
38 #include "main.h"
39
40 /* These work the buffer used by the header and footer. */
41 #define PS_BUFSLOP 128
42
43 /* Convert PostScript point "x" to an AFM unit. */
44 #define PNT2AFM(p, x) \
45 (size_t)((double)(x) * (1000.0 / (double)(p)->ps->scale))
46
47 /* Convert an AFM unit "x" to a PostScript points */
48 #define AFM2PNT(p, x) \
49 ((double)(x) / (1000.0 / (double)(p)->ps->scale))
50
51 struct glyph {
52 unsigned short wx; /* WX in AFM */
53 };
54
55 struct font {
56 const char *name; /* FontName in AFM */
57 #define MAXCHAR 95 /* total characters we can handle */
58 struct glyph gly[MAXCHAR]; /* glyph metrics */
59 };
60
61 struct termp_ps {
62 int flags;
63 #define PS_INLINE (1 << 0) /* we're in a word */
64 #define PS_MARGINS (1 << 1) /* we're in the margins */
65 #define PS_NEWPAGE (1 << 2) /* new page, no words yet */
66 #define PS_BACKSP (1 << 3) /* last character was backspace */
67 size_t pscol; /* visible column (AFM units) */
68 size_t pscolnext; /* used for overstrike */
69 size_t psrow; /* visible row (AFM units) */
70 size_t lastrow; /* psrow of the previous word */
71 char *psmarg; /* margin buf */
72 size_t psmargsz; /* margin buf size */
73 size_t psmargcur; /* cur index in margin buf */
74 char last; /* last non-backspace seen */
75 enum termfont lastf; /* last set font */
76 enum termfont nextf; /* building next font here */
77 size_t scale; /* font scaling factor */
78 size_t pages; /* number of pages shown */
79 size_t lineheight; /* line height (AFM units) */
80 size_t top; /* body top (AFM units) */
81 size_t bottom; /* body bottom (AFM units) */
82 const char *medianame; /* for DocumentMedia and PageSize */
83 size_t height; /* page height (AFM units */
84 size_t width; /* page width (AFM units) */
85 size_t lastwidth; /* page width before last ll */
86 size_t left; /* body left (AFM units) */
87 size_t header; /* header pos (AFM units) */
88 size_t footer; /* footer pos (AFM units) */
89 size_t pdfbytes; /* current output byte */
90 size_t pdflastpg; /* byte of last page mark */
91 size_t pdfbody; /* start of body object */
92 size_t *pdfobjs; /* table of object offsets */
93 size_t pdfobjsz; /* size of pdfobjs */
94 };
95
96 static int ps_hspan(const struct termp *,
97 const struct roffsu *);
98 static size_t ps_width(const struct termp *, int);
99 static void ps_advance(struct termp *, size_t);
100 static void ps_begin(struct termp *);
101 static void ps_closepage(struct termp *);
102 static void ps_end(struct termp *);
103 static void ps_endline(struct termp *);
104 static void ps_growbuf(struct termp *, size_t);
105 static void ps_letter(struct termp *, int);
106 static void ps_pclose(struct termp *);
107 static void ps_plast(struct termp *);
108 static void ps_pletter(struct termp *, int);
109 static void ps_printf(struct termp *, const char *, ...)
110 __attribute__((__format__ (__printf__, 2, 3)));
111 static void ps_putchar(struct termp *, char);
112 static void ps_setfont(struct termp *, enum termfont);
113 static void ps_setwidth(struct termp *, int, int);
114 static struct termp *pspdf_alloc(const struct manoutput *, enum termtype);
115 static void pdf_obj(struct termp *, size_t);
116
117 /*
118 * We define, for the time being, three fonts: bold, oblique/italic, and
119 * normal (roman). The following table hard-codes the font metrics for
120 * ASCII, i.e., 32--127.
121 */
122
123 static const struct font fonts[TERMFONT__MAX] = {
124 { "Times-Roman", {
125 { 250 },
126 { 333 },
127 { 408 },
128 { 500 },
129 { 500 },
130 { 833 },
131 { 778 },
132 { 333 },
133 { 333 },
134 { 333 },
135 { 500 },
136 { 564 },
137 { 250 },
138 { 333 },
139 { 250 },
140 { 278 },
141 { 500 },
142 { 500 },
143 { 500 },
144 { 500 },
145 { 500 },
146 { 500 },
147 { 500 },
148 { 500 },
149 { 500 },
150 { 500 },
151 { 278 },
152 { 278 },
153 { 564 },
154 { 564 },
155 { 564 },
156 { 444 },
157 { 921 },
158 { 722 },
159 { 667 },
160 { 667 },
161 { 722 },
162 { 611 },
163 { 556 },
164 { 722 },
165 { 722 },
166 { 333 },
167 { 389 },
168 { 722 },
169 { 611 },
170 { 889 },
171 { 722 },
172 { 722 },
173 { 556 },
174 { 722 },
175 { 667 },
176 { 556 },
177 { 611 },
178 { 722 },
179 { 722 },
180 { 944 },
181 { 722 },
182 { 722 },
183 { 611 },
184 { 333 },
185 { 278 },
186 { 333 },
187 { 469 },
188 { 500 },
189 { 333 },
190 { 444 },
191 { 500 },
192 { 444 },
193 { 500},
194 { 444},
195 { 333},
196 { 500},
197 { 500},
198 { 278},
199 { 278},
200 { 500},
201 { 278},
202 { 778},
203 { 500},
204 { 500},
205 { 500},
206 { 500},
207 { 333},
208 { 389},
209 { 278},
210 { 500},
211 { 500},
212 { 722},
213 { 500},
214 { 500},
215 { 444},
216 { 480},
217 { 200},
218 { 480},
219 { 541},
220 } },
221 { "Times-Bold", {
222 { 250 },
223 { 333 },
224 { 555 },
225 { 500 },
226 { 500 },
227 { 1000 },
228 { 833 },
229 { 333 },
230 { 333 },
231 { 333 },
232 { 500 },
233 { 570 },
234 { 250 },
235 { 333 },
236 { 250 },
237 { 278 },
238 { 500 },
239 { 500 },
240 { 500 },
241 { 500 },
242 { 500 },
243 { 500 },
244 { 500 },
245 { 500 },
246 { 500 },
247 { 500 },
248 { 333 },
249 { 333 },
250 { 570 },
251 { 570 },
252 { 570 },
253 { 500 },
254 { 930 },
255 { 722 },
256 { 667 },
257 { 722 },
258 { 722 },
259 { 667 },
260 { 611 },
261 { 778 },
262 { 778 },
263 { 389 },
264 { 500 },
265 { 778 },
266 { 667 },
267 { 944 },
268 { 722 },
269 { 778 },
270 { 611 },
271 { 778 },
272 { 722 },
273 { 556 },
274 { 667 },
275 { 722 },
276 { 722 },
277 { 1000 },
278 { 722 },
279 { 722 },
280 { 667 },
281 { 333 },
282 { 278 },
283 { 333 },
284 { 581 },
285 { 500 },
286 { 333 },
287 { 500 },
288 { 556 },
289 { 444 },
290 { 556 },
291 { 444 },
292 { 333 },
293 { 500 },
294 { 556 },
295 { 278 },
296 { 333 },
297 { 556 },
298 { 278 },
299 { 833 },
300 { 556 },
301 { 500 },
302 { 556 },
303 { 556 },
304 { 444 },
305 { 389 },
306 { 333 },
307 { 556 },
308 { 500 },
309 { 722 },
310 { 500 },
311 { 500 },
312 { 444 },
313 { 394 },
314 { 220 },
315 { 394 },
316 { 520 },
317 } },
318 { "Times-Italic", {
319 { 250 },
320 { 333 },
321 { 420 },
322 { 500 },
323 { 500 },
324 { 833 },
325 { 778 },
326 { 333 },
327 { 333 },
328 { 333 },
329 { 500 },
330 { 675 },
331 { 250 },
332 { 333 },
333 { 250 },
334 { 278 },
335 { 500 },
336 { 500 },
337 { 500 },
338 { 500 },
339 { 500 },
340 { 500 },
341 { 500 },
342 { 500 },
343 { 500 },
344 { 500 },
345 { 333 },
346 { 333 },
347 { 675 },
348 { 675 },
349 { 675 },
350 { 500 },
351 { 920 },
352 { 611 },
353 { 611 },
354 { 667 },
355 { 722 },
356 { 611 },
357 { 611 },
358 { 722 },
359 { 722 },
360 { 333 },
361 { 444 },
362 { 667 },
363 { 556 },
364 { 833 },
365 { 667 },
366 { 722 },
367 { 611 },
368 { 722 },
369 { 611 },
370 { 500 },
371 { 556 },
372 { 722 },
373 { 611 },
374 { 833 },
375 { 611 },
376 { 556 },
377 { 556 },
378 { 389 },
379 { 278 },
380 { 389 },
381 { 422 },
382 { 500 },
383 { 333 },
384 { 500 },
385 { 500 },
386 { 444 },
387 { 500 },
388 { 444 },
389 { 278 },
390 { 500 },
391 { 500 },
392 { 278 },
393 { 278 },
394 { 444 },
395 { 278 },
396 { 722 },
397 { 500 },
398 { 500 },
399 { 500 },
400 { 500 },
401 { 389 },
402 { 389 },
403 { 278 },
404 { 500 },
405 { 444 },
406 { 667 },
407 { 444 },
408 { 444 },
409 { 389 },
410 { 400 },
411 { 275 },
412 { 400 },
413 { 541 },
414 } },
415 { "Times-BoldItalic", {
416 { 250 },
417 { 389 },
418 { 555 },
419 { 500 },
420 { 500 },
421 { 833 },
422 { 778 },
423 { 333 },
424 { 333 },
425 { 333 },
426 { 500 },
427 { 570 },
428 { 250 },
429 { 333 },
430 { 250 },
431 { 278 },
432 { 500 },
433 { 500 },
434 { 500 },
435 { 500 },
436 { 500 },
437 { 500 },
438 { 500 },
439 { 500 },
440 { 500 },
441 { 500 },
442 { 333 },
443 { 333 },
444 { 570 },
445 { 570 },
446 { 570 },
447 { 500 },
448 { 832 },
449 { 667 },
450 { 667 },
451 { 667 },
452 { 722 },
453 { 667 },
454 { 667 },
455 { 722 },
456 { 778 },
457 { 389 },
458 { 500 },
459 { 667 },
460 { 611 },
461 { 889 },
462 { 722 },
463 { 722 },
464 { 611 },
465 { 722 },
466 { 667 },
467 { 556 },
468 { 611 },
469 { 722 },
470 { 667 },
471 { 889 },
472 { 667 },
473 { 611 },
474 { 611 },
475 { 333 },
476 { 278 },
477 { 333 },
478 { 570 },
479 { 500 },
480 { 333 },
481 { 500 },
482 { 500 },
483 { 444 },
484 { 500 },
485 { 444 },
486 { 333 },
487 { 500 },
488 { 556 },
489 { 278 },
490 { 278 },
491 { 500 },
492 { 278 },
493 { 778 },
494 { 556 },
495 { 500 },
496 { 500 },
497 { 500 },
498 { 389 },
499 { 389 },
500 { 278 },
501 { 556 },
502 { 444 },
503 { 667 },
504 { 500 },
505 { 444 },
506 { 389 },
507 { 348 },
508 { 220 },
509 { 348 },
510 { 570 },
511 } },
512 };
513
514 void *
pdf_alloc(const struct manoutput * outopts)515 pdf_alloc(const struct manoutput *outopts)
516 {
517 return pspdf_alloc(outopts, TERMTYPE_PDF);
518 }
519
520 void *
ps_alloc(const struct manoutput * outopts)521 ps_alloc(const struct manoutput *outopts)
522 {
523 return pspdf_alloc(outopts, TERMTYPE_PS);
524 }
525
526 static struct termp *
pspdf_alloc(const struct manoutput * outopts,enum termtype type)527 pspdf_alloc(const struct manoutput *outopts, enum termtype type)
528 {
529 struct termp *p;
530 unsigned int pagex, pagey;
531 size_t marginx, marginy, lineheight;
532 const char *pp;
533
534 p = mandoc_calloc(1, sizeof(*p));
535 p->tcol = p->tcols = mandoc_calloc(1, sizeof(*p->tcol));
536 p->maxtcol = 1;
537 p->type = type;
538
539 p->enc = TERMENC_ASCII;
540 p->fontq = mandoc_reallocarray(NULL,
541 (p->fontsz = 8), sizeof(*p->fontq));
542 p->fontq[0] = p->fontl = TERMFONT_NONE;
543 p->ps = mandoc_calloc(1, sizeof(*p->ps));
544
545 p->advance = ps_advance;
546 p->begin = ps_begin;
547 p->end = ps_end;
548 p->endline = ps_endline;
549 p->hspan = ps_hspan;
550 p->letter = ps_letter;
551 p->setwidth = ps_setwidth;
552 p->width = ps_width;
553
554 /* Default to US letter (millimetres). */
555
556 p->ps->medianame = "Letter";
557 pagex = 216;
558 pagey = 279;
559
560 /*
561 * The ISO-269 paper sizes can be calculated automatically, but
562 * it would require bringing in -lm for pow() and I'd rather not
563 * do that. So just do it the easy way for now. Since this
564 * only happens once, I'm not terribly concerned.
565 */
566
567 pp = outopts->paper;
568 if (pp != NULL && strcasecmp(pp, "letter") != 0) {
569 if (strcasecmp(pp, "a3") == 0) {
570 p->ps->medianame = "A3";
571 pagex = 297;
572 pagey = 420;
573 } else if (strcasecmp(pp, "a4") == 0) {
574 p->ps->medianame = "A4";
575 pagex = 210;
576 pagey = 297;
577 } else if (strcasecmp(pp, "a5") == 0) {
578 p->ps->medianame = "A5";
579 pagex = 148;
580 pagey = 210;
581 } else if (strcasecmp(pp, "legal") == 0) {
582 p->ps->medianame = "Legal";
583 pagex = 216;
584 pagey = 356;
585 } else if (sscanf(pp, "%ux%u", &pagex, &pagey) == 2)
586 p->ps->medianame = "CustomSize";
587 else
588 warnx("%s: Unknown paper", pp);
589 }
590
591 /*
592 * This MUST be defined before any PNT2AFM or AFM2PNT
593 * calculations occur.
594 */
595
596 p->ps->scale = 11;
597
598 /* Remember millimetres -> AFM units. */
599
600 pagex = PNT2AFM(p, ((double)pagex * 72.0 / 25.4));
601 pagey = PNT2AFM(p, ((double)pagey * 72.0 / 25.4));
602
603 /* Margins are 1/9 the page x and y. */
604
605 marginx = (size_t)((double)pagex / 9.0);
606 marginy = (size_t)((double)pagey / 9.0);
607
608 /* Line-height is 1.4em. */
609
610 lineheight = PNT2AFM(p, ((double)p->ps->scale * 1.4));
611
612 p->ps->width = p->ps->lastwidth = (size_t)pagex;
613 p->ps->height = (size_t)pagey;
614 p->ps->header = pagey - (marginy / 2) - (lineheight / 2);
615 p->ps->top = pagey - marginy;
616 p->ps->footer = (marginy / 2) - (lineheight / 2);
617 p->ps->bottom = marginy;
618 p->ps->left = marginx;
619 p->ps->lineheight = lineheight;
620
621 p->defrmargin = pagex - (marginx * 2);
622 return p;
623 }
624
625 static void
ps_setwidth(struct termp * p,int iop,int width)626 ps_setwidth(struct termp *p, int iop, int width)
627 {
628 size_t lastwidth;
629
630 lastwidth = p->ps->width;
631 if (iop > 0)
632 p->ps->width += width;
633 else if (iop == 0)
634 p->ps->width = width ? (size_t)width : p->ps->lastwidth;
635 else if (p->ps->width > (size_t)width)
636 p->ps->width -= width;
637 else
638 p->ps->width = 0;
639 p->ps->lastwidth = lastwidth;
640 }
641
642 void
pspdf_free(void * arg)643 pspdf_free(void *arg)
644 {
645 struct termp *p;
646
647 p = (struct termp *)arg;
648
649 free(p->ps->psmarg);
650 free(p->ps->pdfobjs);
651
652 free(p->ps);
653 term_free(p);
654 }
655
656 static void
ps_printf(struct termp * p,const char * fmt,...)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
ps_putchar(struct termp * p,char c)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
pdf_obj(struct termp * p,size_t obj)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
ps_closepage(struct termp * p)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 shown. 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 len = p->ps->pdfbytes - p->ps->pdflastpg;
747 base = p->ps->pages * 4 + p->ps->pdfbody;
748
749 ps_printf(p, "endstream\nendobj\n");
750
751 /* Length of content. */
752 pdf_obj(p, base + 1);
753 ps_printf(p, "%zu\nendobj\n", len);
754
755 /* Resource for content. */
756 pdf_obj(p, base + 2);
757 ps_printf(p, "<<\n/ProcSet [/PDF /Text]\n");
758 ps_printf(p, "/Font <<\n");
759 for (i = 0; i < (int)TERMFONT__MAX; i++)
760 ps_printf(p, "/F%d %d 0 R\n", i, 3 + i);
761 ps_printf(p, ">>\n>>\nendobj\n");
762
763 /* Page node. */
764 pdf_obj(p, base + 3);
765 ps_printf(p, "<<\n");
766 ps_printf(p, "/Type /Page\n");
767 ps_printf(p, "/Parent 2 0 R\n");
768 ps_printf(p, "/Resources %zu 0 R\n", base + 2);
769 ps_printf(p, "/Contents %zu 0 R\n", base);
770 ps_printf(p, ">>\nendobj\n");
771 } else
772 ps_printf(p, "showpage\n");
773
774 p->ps->pages++;
775 p->ps->psrow = p->ps->top;
776 assert( ! (PS_NEWPAGE & p->ps->flags));
777 p->ps->flags |= PS_NEWPAGE;
778 }
779
780 static void
ps_end(struct termp * p)781 ps_end(struct termp *p)
782 {
783 size_t i, xref, base;
784
785 ps_plast(p);
786 ps_pclose(p);
787
788 /*
789 * At the end of the file, do one last showpage. This is the
790 * same behaviour as groff(1) and works for multiple pages as
791 * well as just one.
792 */
793
794 if ( ! (PS_NEWPAGE & p->ps->flags)) {
795 assert(0 == p->ps->flags);
796 assert('\0' == p->ps->last);
797 ps_closepage(p);
798 }
799
800 if (TERMTYPE_PS == p->type) {
801 ps_printf(p, "%%%%Trailer\n");
802 ps_printf(p, "%%%%Pages: %zu\n", p->ps->pages);
803 ps_printf(p, "%%%%EOF\n");
804 return;
805 }
806
807 pdf_obj(p, 2);
808 ps_printf(p, "<<\n/Type /Pages\n");
809 ps_printf(p, "/MediaBox [0 0 %zu %zu]\n",
810 (size_t)AFM2PNT(p, p->ps->width),
811 (size_t)AFM2PNT(p, p->ps->height));
812
813 ps_printf(p, "/Count %zu\n", p->ps->pages);
814 ps_printf(p, "/Kids [");
815
816 for (i = 0; i < p->ps->pages; i++)
817 ps_printf(p, " %zu 0 R", i * 4 + p->ps->pdfbody + 3);
818
819 base = (p->ps->pages - 1) * 4 + p->ps->pdfbody + 4;
820
821 ps_printf(p, "]\n>>\nendobj\n");
822 pdf_obj(p, base);
823 ps_printf(p, "<<\n");
824 ps_printf(p, "/Type /Catalog\n");
825 ps_printf(p, "/Pages 2 0 R\n");
826 ps_printf(p, ">>\nendobj\n");
827 xref = p->ps->pdfbytes;
828 ps_printf(p, "xref\n");
829 ps_printf(p, "0 %zu\n", base + 1);
830 ps_printf(p, "0000000000 65535 f \n");
831
832 for (i = 0; i < base; i++)
833 ps_printf(p, "%.10zu 00000 n \n",
834 p->ps->pdfobjs[(int)i]);
835
836 ps_printf(p, "trailer\n");
837 ps_printf(p, "<<\n");
838 ps_printf(p, "/Size %zu\n", base + 1);
839 ps_printf(p, "/Root %zu 0 R\n", base);
840 ps_printf(p, "/Info 1 0 R\n");
841 ps_printf(p, ">>\n");
842 ps_printf(p, "startxref\n");
843 ps_printf(p, "%zu\n", xref);
844 ps_printf(p, "%%%%EOF\n");
845 }
846
847 static void
ps_begin(struct termp * p)848 ps_begin(struct termp *p)
849 {
850 size_t width, height;
851 int i;
852
853 /*
854 * Print margins into margin buffer. Nothing gets output to the
855 * screen yet, so we don't need to initialise the primary state.
856 */
857
858 if (p->ps->psmarg) {
859 assert(p->ps->psmargsz);
860 p->ps->psmarg[0] = '\0';
861 }
862
863 /*p->ps->pdfbytes = 0;*/
864 p->ps->psmargcur = 0;
865 p->ps->flags = PS_MARGINS;
866 p->ps->pscol = p->ps->left;
867 p->ps->psrow = p->ps->header;
868 p->ps->lastrow = 0; /* impossible row */
869
870 ps_setfont(p, TERMFONT_NONE);
871
872 (*p->headf)(p, p->argf);
873 (*p->endline)(p);
874
875 p->ps->pscol = p->ps->left;
876 p->ps->psrow = p->ps->footer;
877
878 (*p->footf)(p, p->argf);
879 (*p->endline)(p);
880
881 p->ps->flags &= ~PS_MARGINS;
882
883 assert(0 == p->ps->flags);
884 assert(p->ps->psmarg);
885 assert('\0' != p->ps->psmarg[0]);
886
887 /*
888 * Print header and initialise page state. Following this,
889 * stuff gets printed to the screen, so make sure we're sane.
890 */
891
892 if (TERMTYPE_PS == p->type) {
893 width = AFM2PNT(p, p->ps->width);
894 height = AFM2PNT(p, p->ps->height);
895
896 ps_printf(p, "%%!PS-Adobe-3.0\n");
897 ps_printf(p, "%%%%DocumentData: Clean7Bit\n");
898 ps_printf(p, "%%%%Orientation: Portrait\n");
899 ps_printf(p, "%%%%Pages: (atend)\n");
900 ps_printf(p, "%%%%PageOrder: Ascend\n");
901 ps_printf(p, "%%%%DocumentMedia: man-%s %zu %zu 0 () ()\n",
902 p->ps->medianame, width, height);
903 ps_printf(p, "%%%%DocumentNeededResources: font");
904
905 for (i = 0; i < (int)TERMFONT__MAX; i++)
906 ps_printf(p, " %s", fonts[i].name);
907
908 ps_printf(p, "\n%%%%DocumentSuppliedResources: "
909 "procset MandocProcs 1.0 0\n");
910 ps_printf(p, "%%%%EndComments\n");
911 ps_printf(p, "%%%%BeginProlog\n");
912 ps_printf(p, "%%%%BeginResource: procset MandocProcs "
913 "10170 10170\n");
914 /* The font size is effectively hard-coded for now. */
915 ps_printf(p, "/fs %zu def\n", p->ps->scale);
916 for (i = 0; i < (int)TERMFONT__MAX; i++)
917 ps_printf(p, "/f%d { /%s fs selectfont } def\n",
918 i, fonts[i].name);
919 ps_printf(p, "/s { 3 1 roll moveto show } bind def\n");
920 ps_printf(p, "/c { exch currentpoint exch pop "
921 "moveto show } bind def\n");
922 ps_printf(p, "%%%%EndResource\n");
923 ps_printf(p, "%%%%EndProlog\n");
924 ps_printf(p, "%%%%BeginSetup\n");
925 ps_printf(p, "%%%%BeginFeature: *PageSize %s\n",
926 p->ps->medianame);
927 ps_printf(p, "<</PageSize [%zu %zu]>>setpagedevice\n",
928 width, height);
929 ps_printf(p, "%%%%EndFeature\n");
930 ps_printf(p, "%%%%EndSetup\n");
931 } else {
932 ps_printf(p, "%%PDF-1.1\n");
933 pdf_obj(p, 1);
934 ps_printf(p, "<<\n");
935 ps_printf(p, ">>\n");
936 ps_printf(p, "endobj\n");
937
938 for (i = 0; i < (int)TERMFONT__MAX; i++) {
939 pdf_obj(p, (size_t)i + 3);
940 ps_printf(p, "<<\n");
941 ps_printf(p, "/Type /Font\n");
942 ps_printf(p, "/Subtype /Type1\n");
943 ps_printf(p, "/Name /F%d\n", i);
944 ps_printf(p, "/BaseFont /%s\n", fonts[i].name);
945 ps_printf(p, ">>\nendobj\n");
946 }
947 }
948
949 p->ps->pdfbody = (size_t)TERMFONT__MAX + 3;
950 p->ps->pscol = p->ps->left;
951 p->ps->psrow = p->ps->top;
952 p->ps->flags |= PS_NEWPAGE;
953 ps_setfont(p, TERMFONT_NONE);
954 }
955
956 static void
ps_pletter(struct termp * p,int c)957 ps_pletter(struct termp *p, int c)
958 {
959 int f;
960
961 /*
962 * If we haven't opened a page context, then output that we're
963 * in a new page and make sure the font is correctly set.
964 */
965
966 if (PS_NEWPAGE & p->ps->flags) {
967 if (TERMTYPE_PS == p->type) {
968 ps_printf(p, "%%%%Page: %zu %zu\n",
969 p->ps->pages + 1, p->ps->pages + 1);
970 ps_printf(p, "f%d\n", (int)p->ps->lastf);
971 } else {
972 pdf_obj(p, p->ps->pdfbody +
973 p->ps->pages * 4);
974 ps_printf(p, "<<\n");
975 ps_printf(p, "/Length %zu 0 R\n",
976 p->ps->pdfbody + 1 + p->ps->pages * 4);
977 ps_printf(p, ">>\nstream\n");
978 }
979 p->ps->pdflastpg = p->ps->pdfbytes;
980 p->ps->flags &= ~PS_NEWPAGE;
981 }
982
983 /*
984 * If we're not in a PostScript "word" context, then open one
985 * now at the current cursor.
986 */
987
988 if ( ! (PS_INLINE & p->ps->flags)) {
989 if (TERMTYPE_PS != p->type) {
990 ps_printf(p, "BT\n/F%d %zu Tf\n",
991 (int)p->ps->lastf, p->ps->scale);
992 ps_printf(p, "%.3f %.3f Td\n(",
993 AFM2PNT(p, p->ps->pscol),
994 AFM2PNT(p, p->ps->psrow));
995 } else {
996 ps_printf(p, "%.3f", AFM2PNT(p, p->ps->pscol));
997 if (p->ps->psrow != p->ps->lastrow)
998 ps_printf(p, " %.3f",
999 AFM2PNT(p, p->ps->psrow));
1000 ps_printf(p, "(");
1001 }
1002 p->ps->flags |= PS_INLINE;
1003 }
1004
1005 assert( ! (PS_NEWPAGE & p->ps->flags));
1006
1007 /*
1008 * We need to escape these characters as per the PostScript
1009 * specification. We would also escape non-graphable characters
1010 * (like tabs), but none of them would get to this point and
1011 * it's superfluous to abort() on them.
1012 */
1013
1014 switch (c) {
1015 case '(':
1016 case ')':
1017 case '\\':
1018 ps_putchar(p, '\\');
1019 break;
1020 default:
1021 break;
1022 }
1023
1024 /* Write the character and adjust where we are on the page. */
1025
1026 f = (int)p->ps->lastf;
1027
1028 if (c <= 32 || c - 32 >= MAXCHAR)
1029 c = 32;
1030
1031 ps_putchar(p, (char)c);
1032 c -= 32;
1033 p->ps->pscol += (size_t)fonts[f].gly[c].wx;
1034 }
1035
1036 static void
ps_pclose(struct termp * p)1037 ps_pclose(struct termp *p)
1038 {
1039
1040 /*
1041 * Spit out that we're exiting a word context (this is a
1042 * "partial close" because we don't check the last-char buffer
1043 * or anything).
1044 */
1045
1046 if ( ! (PS_INLINE & p->ps->flags))
1047 return;
1048
1049 if (TERMTYPE_PS != p->type)
1050 ps_printf(p, ") Tj\nET\n");
1051 else if (p->ps->psrow == p->ps->lastrow)
1052 ps_printf(p, ")c\n");
1053 else {
1054 ps_printf(p, ")s\n");
1055 p->ps->lastrow = p->ps->psrow;
1056 }
1057
1058 p->ps->flags &= ~PS_INLINE;
1059 }
1060
1061 /* If we have a `last' char that wasn't printed yet, print it now. */
1062 static void
ps_plast(struct termp * p)1063 ps_plast(struct termp *p)
1064 {
1065 size_t wx;
1066
1067 if (p->ps->last == '\0')
1068 return;
1069
1070 /* Check the font mode; open a new scope if it doesn't match. */
1071
1072 if (p->ps->nextf != p->ps->lastf) {
1073 ps_pclose(p);
1074 ps_setfont(p, p->ps->nextf);
1075 }
1076 p->ps->nextf = TERMFONT_NONE;
1077
1078 /*
1079 * For an overstrike, if a previous character
1080 * was wider, advance to center the new one.
1081 */
1082
1083 if (p->ps->pscolnext) {
1084 wx = fonts[p->ps->lastf].gly[(int)p->ps->last-32].wx;
1085 if (p->ps->pscol + wx < p->ps->pscolnext)
1086 p->ps->pscol = (p->ps->pscol +
1087 p->ps->pscolnext - wx) / 2;
1088 }
1089
1090 ps_pletter(p, p->ps->last);
1091 p->ps->last = '\0';
1092
1093 /*
1094 * For an overstrike, if a previous character
1095 * was wider, advance to the end of the old one.
1096 */
1097
1098 if (p->ps->pscol < p->ps->pscolnext) {
1099 ps_pclose(p);
1100 p->ps->pscol = p->ps->pscolnext;
1101 }
1102 }
1103
1104 static void
ps_letter(struct termp * p,int arg)1105 ps_letter(struct termp *p, int arg)
1106 {
1107 size_t savecol;
1108 char c;
1109
1110 c = arg >= 128 || arg <= 0 ? '?' : arg;
1111
1112 /*
1113 * When receiving a backspace, merely flag it.
1114 * We don't know yet whether it is
1115 * a font instruction or an overstrike.
1116 */
1117
1118 if (c == '\b') {
1119 assert(p->ps->last != '\0');
1120 assert( ! (p->ps->flags & PS_BACKSP));
1121 p->ps->flags |= PS_BACKSP;
1122 return;
1123 }
1124
1125 /*
1126 * Decode font instructions.
1127 */
1128
1129 if (p->ps->flags & PS_BACKSP) {
1130 if (p->ps->last == '_') {
1131 switch (p->ps->nextf) {
1132 case TERMFONT_BI:
1133 break;
1134 case TERMFONT_BOLD:
1135 p->ps->nextf = TERMFONT_BI;
1136 break;
1137 default:
1138 p->ps->nextf = TERMFONT_UNDER;
1139 }
1140 p->ps->last = c;
1141 p->ps->flags &= ~PS_BACKSP;
1142 return;
1143 }
1144 if (p->ps->last == c) {
1145 switch (p->ps->nextf) {
1146 case TERMFONT_BI:
1147 break;
1148 case TERMFONT_UNDER:
1149 p->ps->nextf = TERMFONT_BI;
1150 break;
1151 default:
1152 p->ps->nextf = TERMFONT_BOLD;
1153 }
1154 p->ps->flags &= ~PS_BACKSP;
1155 return;
1156 }
1157
1158 /*
1159 * This is not a font instruction, but rather
1160 * the next character. Prepare for overstrike.
1161 */
1162
1163 savecol = p->ps->pscol;
1164 } else
1165 savecol = SIZE_MAX;
1166
1167 /*
1168 * We found the next character, so the font instructions
1169 * for the previous one are complete.
1170 * Use them and print it.
1171 */
1172
1173 ps_plast(p);
1174
1175 /*
1176 * Do not print the current character yet because font
1177 * instructions might follow; only remember the character.
1178 * It will get printed later from ps_plast().
1179 */
1180
1181 p->ps->last = c;
1182
1183 /*
1184 * For an overstrike, back up to the previous position.
1185 * If the previous character is wider than any it overstrikes,
1186 * remember the current position, because it might also be
1187 * wider than all that will overstrike it.
1188 */
1189
1190 if (savecol != SIZE_MAX) {
1191 if (p->ps->pscolnext < p->ps->pscol)
1192 p->ps->pscolnext = p->ps->pscol;
1193 ps_pclose(p);
1194 p->ps->pscol = savecol;
1195 p->ps->flags &= ~PS_BACKSP;
1196 } else
1197 p->ps->pscolnext = 0;
1198 }
1199
1200 static void
ps_advance(struct termp * p,size_t len)1201 ps_advance(struct termp *p, size_t len)
1202 {
1203
1204 /*
1205 * Advance some spaces. This can probably be made smarter,
1206 * i.e., to have multiple space-separated words in the same
1207 * scope, but this is easier: just close out the current scope
1208 * and readjust our column settings.
1209 */
1210
1211 ps_plast(p);
1212 ps_pclose(p);
1213 p->ps->pscol += len;
1214 }
1215
1216 static void
ps_endline(struct termp * p)1217 ps_endline(struct termp *p)
1218 {
1219
1220 /* Close out any scopes we have open: we're at eoln. */
1221
1222 ps_plast(p);
1223 ps_pclose(p);
1224
1225 /*
1226 * If we're in the margin, don't try to recalculate our current
1227 * row. XXX: if the column tries to be fancy with multiple
1228 * lines, we'll do nasty stuff.
1229 */
1230
1231 if (PS_MARGINS & p->ps->flags)
1232 return;
1233
1234 /* Left-justify. */
1235
1236 p->ps->pscol = p->ps->left;
1237
1238 /* If we haven't printed anything, return. */
1239
1240 if (PS_NEWPAGE & p->ps->flags)
1241 return;
1242
1243 /*
1244 * Put us down a line. If we're at the page bottom, spit out a
1245 * showpage and restart our row.
1246 */
1247
1248 if (p->ps->psrow >= p->ps->lineheight + p->ps->bottom) {
1249 p->ps->psrow -= p->ps->lineheight;
1250 return;
1251 }
1252
1253 ps_closepage(p);
1254
1255 if ((int)p->tcol->offset > p->ti)
1256 p->tcol->offset -= p->ti;
1257 else
1258 p->tcol->offset = 0;
1259 p->ti = 0;
1260 }
1261
1262 static void
ps_setfont(struct termp * p,enum termfont f)1263 ps_setfont(struct termp *p, enum termfont f)
1264 {
1265
1266 assert(f < TERMFONT__MAX);
1267 p->ps->lastf = f;
1268
1269 /*
1270 * If we're still at the top of the page, let the font-setting
1271 * be delayed until we actually have stuff to print.
1272 */
1273
1274 if (PS_NEWPAGE & p->ps->flags)
1275 return;
1276
1277 if (TERMTYPE_PS == p->type)
1278 ps_printf(p, "f%d\n", (int)f);
1279 else
1280 ps_printf(p, "/F%d %zu Tf\n",
1281 (int)f, p->ps->scale);
1282 }
1283
1284 static size_t
ps_width(const struct termp * p,int c)1285 ps_width(const struct termp *p, int c)
1286 {
1287
1288 if (c <= 32 || c - 32 >= MAXCHAR)
1289 c = 0;
1290 else
1291 c -= 32;
1292
1293 return (size_t)fonts[(int)TERMFONT_NONE].gly[c].wx;
1294 }
1295
1296 static int
ps_hspan(const struct termp * p,const struct roffsu * su)1297 ps_hspan(const struct termp *p, const struct roffsu *su)
1298 {
1299 double r;
1300
1301 /*
1302 * All of these measurements are derived by converting from the
1303 * native measurement to AFM units.
1304 */
1305 switch (su->unit) {
1306 case SCALE_BU:
1307 /*
1308 * Traditionally, the default unit is fixed to the
1309 * output media. So this would refer to the point. In
1310 * mandoc(1), however, we stick to the default terminal
1311 * scaling unit so that output is the same regardless
1312 * the media.
1313 */
1314 r = PNT2AFM(p, su->scale * 72.0 / 240.0);
1315 break;
1316 case SCALE_CM:
1317 r = PNT2AFM(p, su->scale * 72.0 / 2.54);
1318 break;
1319 case SCALE_EM:
1320 r = su->scale *
1321 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx;
1322 break;
1323 case SCALE_EN:
1324 r = su->scale *
1325 fonts[(int)TERMFONT_NONE].gly[110 - 32].wx;
1326 break;
1327 case SCALE_IN:
1328 r = PNT2AFM(p, su->scale * 72.0);
1329 break;
1330 case SCALE_MM:
1331 r = su->scale *
1332 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx / 100.0;
1333 break;
1334 case SCALE_PC:
1335 r = PNT2AFM(p, su->scale * 12.0);
1336 break;
1337 case SCALE_PT:
1338 r = PNT2AFM(p, su->scale * 1.0);
1339 break;
1340 case SCALE_VS:
1341 r = su->scale * p->ps->lineheight;
1342 break;
1343 default:
1344 r = su->scale;
1345 break;
1346 }
1347
1348 return r * 24.0;
1349 }
1350
1351 static void
ps_growbuf(struct termp * p,size_t sz)1352 ps_growbuf(struct termp *p, size_t sz)
1353 {
1354 if (p->ps->psmargcur + sz <= p->ps->psmargsz)
1355 return;
1356
1357 if (sz < PS_BUFSLOP)
1358 sz = PS_BUFSLOP;
1359
1360 p->ps->psmargsz += sz;
1361 p->ps->psmarg = mandoc_realloc(p->ps->psmarg, p->ps->psmargsz);
1362 }
1363