xref: /openbsd/usr.bin/mandoc/term_ps.c (revision 30c2fcb2)
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