1/*	$Id: term_ps.c,v 1.54 2011/10/16 12:20:34 schwarze Exp $ */
2/*
3 * Copyright (c) 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17#ifdef HAVE_CONFIG_H
18#include "config.h"
19#endif
20
21#include <sys/types.h>
22
23#include <assert.h>
24#include <stdarg.h>
25#include <stdint.h>
26#include <stdio.h>
27#include <stdlib.h>
28#include <string.h>
29#include <time.h>
30#include <unistd.h>
31
32#include "mandoc.h"
33#include "out.h"
34#include "main.h"
35#include "term.h"
36
37/* These work the buffer used by the header and footer. */
38#define	PS_BUFSLOP	  128
39
40/* Convert PostScript point "x" to an AFM unit. */
41#define	PNT2AFM(p, x) /* LINTED */ \
42	(size_t)((double)(x) * (1000.0 / (double)(p)->ps->scale))
43
44/* Convert an AFM unit "x" to a PostScript points */
45#define	AFM2PNT(p, x) /* LINTED */ \
46	((double)(x) / (1000.0 / (double)(p)->ps->scale))
47
48struct	glyph {
49	unsigned short	  wx; /* WX in AFM */
50};
51
52struct	font {
53	const char	 *name; /* FontName in AFM */
54#define	MAXCHAR		  95 /* total characters we can handle */
55	struct glyph	  gly[MAXCHAR]; /* glyph metrics */
56};
57
58struct	termp_ps {
59	int		  flags;
60#define	PS_INLINE	 (1 << 0)	/* we're in a word */
61#define	PS_MARGINS	 (1 << 1)	/* we're in the margins */
62#define	PS_NEWPAGE	 (1 << 2)	/* new page, no words yet */
63	size_t		  pscol;	/* visible column (AFM units) */
64	size_t		  psrow;	/* visible row (AFM units) */
65	char		 *psmarg;	/* margin buf */
66	size_t		  psmargsz;	/* margin buf size */
67	size_t		  psmargcur;	/* cur index in margin buf */
68	char		  last;		/* character buffer */
69	enum termfont	  lastf;	/* last set font */
70	size_t		  scale;	/* font scaling factor */
71	size_t		  pages;	/* number of pages shown */
72	size_t		  lineheight;	/* line height (AFM units) */
73	size_t		  top;		/* body top (AFM units) */
74	size_t		  bottom;	/* body bottom (AFM units) */
75	size_t		  height;	/* page height (AFM units */
76	size_t		  width;	/* page width (AFM units) */
77	size_t		  left;		/* body left (AFM units) */
78	size_t		  header;	/* header pos (AFM units) */
79	size_t		  footer;	/* footer pos (AFM units) */
80	size_t		  pdfbytes; 	/* current output byte */
81	size_t		  pdflastpg;	/* byte of last page mark */
82	size_t		  pdfbody;	/* start of body object */
83	size_t		 *pdfobjs;	/* table of object offsets */
84	size_t		  pdfobjsz;	/* size of pdfobjs */
85};
86
87static	double		  ps_hspan(const struct termp *,
88				const struct roffsu *);
89static	size_t		  ps_width(const struct termp *, int);
90static	void		  ps_advance(struct termp *, size_t);
91static	void		  ps_begin(struct termp *);
92static	void		  ps_closepage(struct termp *);
93static	void		  ps_end(struct termp *);
94static	void		  ps_endline(struct termp *);
95static	void		  ps_fclose(struct termp *);
96static	void		  ps_growbuf(struct termp *, size_t);
97static	void		  ps_letter(struct termp *, int);
98static	void		  ps_pclose(struct termp *);
99static	void		  ps_pletter(struct termp *, int);
100static	void		  ps_printf(struct termp *, const char *, ...);
101static	void		  ps_putchar(struct termp *, char);
102static	void		  ps_setfont(struct termp *, enum termfont);
103static	struct termp	 *pspdf_alloc(char *);
104static	void		  pdf_obj(struct termp *, size_t);
105
106/*
107 * We define, for the time being, three fonts: bold, oblique/italic, and
108 * normal (roman).  The following table hard-codes the font metrics for
109 * ASCII, i.e., 32--127.
110 */
111
112static	const struct font fonts[TERMFONT__MAX] = {
113	{ "Times-Roman", {
114		{ 250 },
115		{ 333 },
116		{ 408 },
117		{ 500 },
118		{ 500 },
119		{ 833 },
120		{ 778 },
121		{ 333 },
122		{ 333 },
123		{ 333 },
124		{ 500 },
125		{ 564 },
126		{ 250 },
127		{ 333 },
128		{ 250 },
129		{ 278 },
130		{ 500 },
131		{ 500 },
132		{ 500 },
133		{ 500 },
134		{ 500 },
135		{ 500 },
136		{ 500 },
137		{ 500 },
138		{ 500 },
139		{ 500 },
140		{ 278 },
141		{ 278 },
142		{ 564 },
143		{ 564 },
144		{ 564 },
145		{ 444 },
146		{ 921 },
147		{ 722 },
148		{ 667 },
149		{ 667 },
150		{ 722 },
151		{ 611 },
152		{ 556 },
153		{ 722 },
154		{ 722 },
155		{ 333 },
156		{ 389 },
157		{ 722 },
158		{ 611 },
159		{ 889 },
160		{ 722 },
161		{ 722 },
162		{ 556 },
163		{ 722 },
164		{ 667 },
165		{ 556 },
166		{ 611 },
167		{ 722 },
168		{ 722 },
169		{ 944 },
170		{ 722 },
171		{ 722 },
172		{ 611 },
173		{ 333 },
174		{ 278 },
175		{ 333 },
176		{ 469 },
177		{ 500 },
178		{ 333 },
179		{ 444 },
180		{ 500 },
181		{ 444 },
182		{  500},
183		{  444},
184		{  333},
185		{  500},
186		{  500},
187		{  278},
188		{  278},
189		{  500},
190		{  278},
191		{  778},
192		{  500},
193		{  500},
194		{  500},
195		{  500},
196		{  333},
197		{  389},
198		{  278},
199		{  500},
200		{  500},
201		{  722},
202		{  500},
203		{  500},
204		{  444},
205		{  480},
206		{  200},
207		{  480},
208		{  541},
209	} },
210	{ "Times-Bold", {
211		{ 250  },
212		{ 333  },
213		{ 555  },
214		{ 500  },
215		{ 500  },
216		{ 1000 },
217		{ 833  },
218		{ 333  },
219		{ 333  },
220		{ 333  },
221		{ 500  },
222		{ 570  },
223		{ 250  },
224		{ 333  },
225		{ 250  },
226		{ 278  },
227		{ 500  },
228		{ 500  },
229		{ 500  },
230		{ 500  },
231		{ 500  },
232		{ 500  },
233		{ 500  },
234		{ 500  },
235		{ 500  },
236		{ 500  },
237		{ 333  },
238		{ 333  },
239		{ 570  },
240		{ 570  },
241		{ 570  },
242		{ 500  },
243		{ 930  },
244		{ 722  },
245		{ 667  },
246		{ 722  },
247		{ 722  },
248		{ 667  },
249		{ 611  },
250		{ 778  },
251		{ 778  },
252		{ 389  },
253		{ 500  },
254		{ 778  },
255		{ 667  },
256		{ 944  },
257		{ 722  },
258		{ 778  },
259		{ 611  },
260		{ 778  },
261		{ 722  },
262		{ 556  },
263		{ 667  },
264		{ 722  },
265		{ 722  },
266		{ 1000 },
267		{ 722  },
268		{ 722  },
269		{ 667  },
270		{ 333  },
271		{ 278  },
272		{ 333  },
273		{ 581  },
274		{ 500  },
275		{ 333  },
276		{ 500  },
277		{ 556  },
278		{ 444  },
279		{  556 },
280		{  444 },
281		{  333 },
282		{  500 },
283		{  556 },
284		{  278 },
285		{  333 },
286		{  556 },
287		{  278 },
288		{  833 },
289		{  556 },
290		{  500 },
291		{  556 },
292		{  556 },
293		{  444 },
294		{  389 },
295		{  333 },
296		{  556 },
297		{  500 },
298		{  722 },
299		{  500 },
300		{  500 },
301		{  444 },
302		{  394 },
303		{  220 },
304		{  394 },
305		{  520 },
306	} },
307	{ "Times-Italic", {
308		{ 250  },
309		{ 333  },
310		{ 420  },
311		{ 500  },
312		{ 500  },
313		{ 833  },
314		{ 778  },
315		{ 333  },
316		{ 333  },
317		{ 333  },
318		{ 500  },
319		{ 675  },
320		{ 250  },
321		{ 333  },
322		{ 250  },
323		{ 278  },
324		{ 500  },
325		{ 500  },
326		{ 500  },
327		{ 500  },
328		{ 500  },
329		{ 500  },
330		{ 500  },
331		{ 500  },
332		{ 500  },
333		{ 500  },
334		{ 333  },
335		{ 333  },
336		{ 675  },
337		{ 675  },
338		{ 675  },
339		{ 500  },
340		{ 920  },
341		{ 611  },
342		{ 611  },
343		{ 667  },
344		{ 722  },
345		{ 611  },
346		{ 611  },
347		{ 722  },
348		{ 722  },
349		{ 333  },
350		{ 444  },
351		{ 667  },
352		{ 556  },
353		{ 833  },
354		{ 667  },
355		{ 722  },
356		{ 611  },
357		{ 722  },
358		{ 611  },
359		{ 500  },
360		{ 556  },
361		{ 722  },
362		{ 611  },
363		{ 833  },
364		{ 611  },
365		{ 556  },
366		{ 556  },
367		{ 389  },
368		{ 278  },
369		{ 389  },
370		{ 422  },
371		{ 500  },
372		{ 333  },
373		{ 500  },
374		{ 500  },
375		{ 444  },
376		{  500 },
377		{  444 },
378		{  278 },
379		{  500 },
380		{  500 },
381		{  278 },
382		{  278 },
383		{  444 },
384		{  278 },
385		{  722 },
386		{  500 },
387		{  500 },
388		{  500 },
389		{  500 },
390		{  389 },
391		{  389 },
392		{  278 },
393		{  500 },
394		{  444 },
395		{  667 },
396		{  444 },
397		{  444 },
398		{  389 },
399		{  400 },
400		{  275 },
401		{  400 },
402		{  541 },
403	} },
404};
405
406void *
407pdf_alloc(char *outopts)
408{
409	struct termp	*p;
410
411	if (NULL != (p = pspdf_alloc(outopts)))
412		p->type = TERMTYPE_PDF;
413
414	return(p);
415}
416
417void *
418ps_alloc(char *outopts)
419{
420	struct termp	*p;
421
422	if (NULL != (p = pspdf_alloc(outopts)))
423		p->type = TERMTYPE_PS;
424
425	return(p);
426}
427
428static struct termp *
429pspdf_alloc(char *outopts)
430{
431	struct termp	*p;
432	unsigned int	 pagex, pagey;
433	size_t		 marginx, marginy, lineheight;
434	const char	*toks[2];
435	const char	*pp;
436	char		*v;
437
438	p = mandoc_calloc(1, sizeof(struct termp));
439	p->enc = TERMENC_ASCII;
440	p->ps = mandoc_calloc(1, sizeof(struct termp_ps));
441
442	p->advance = ps_advance;
443	p->begin = ps_begin;
444	p->end = ps_end;
445	p->endline = ps_endline;
446	p->hspan = ps_hspan;
447	p->letter = ps_letter;
448	p->width = ps_width;
449
450	toks[0] = "paper";
451	toks[1] = NULL;
452
453	pp = NULL;
454
455	while (outopts && *outopts)
456		switch (getsubopt(&outopts, UNCONST(toks), &v)) {
457		case (0):
458			pp = v;
459			break;
460		default:
461			break;
462		}
463
464	/* Default to US letter (millimetres). */
465
466	pagex = 216;
467	pagey = 279;
468
469	/*
470	 * The ISO-269 paper sizes can be calculated automatically, but
471	 * it would require bringing in -lm for pow() and I'd rather not
472	 * do that.  So just do it the easy way for now.  Since this
473	 * only happens once, I'm not terribly concerned.
474	 */
475
476	if (pp && strcasecmp(pp, "letter")) {
477		if (0 == strcasecmp(pp, "a3")) {
478			pagex = 297;
479			pagey = 420;
480		} else if (0 == strcasecmp(pp, "a4")) {
481			pagex = 210;
482			pagey = 297;
483		} else if (0 == strcasecmp(pp, "a5")) {
484			pagex = 148;
485			pagey = 210;
486		} else if (0 == strcasecmp(pp, "legal")) {
487			pagex = 216;
488			pagey = 356;
489		} else if (2 != sscanf(pp, "%ux%u", &pagex, &pagey))
490			fprintf(stderr, "%s: Unknown paper\n", pp);
491	}
492
493	/*
494	 * This MUST be defined before any PNT2AFM or AFM2PNT
495	 * calculations occur.
496	 */
497
498	p->ps->scale = 11;
499
500	/* Remember millimetres -> AFM units. */
501
502	pagex = PNT2AFM(p, ((double)pagex * 2.834));
503	pagey = PNT2AFM(p, ((double)pagey * 2.834));
504
505	/* Margins are 1/9 the page x and y. */
506
507	marginx = /* LINTED */
508		(size_t)((double)pagex / 9.0);
509	marginy = /* LINTED */
510		(size_t)((double)pagey / 9.0);
511
512	/* Line-height is 1.4em. */
513
514	lineheight = PNT2AFM(p, ((double)p->ps->scale * 1.4));
515
516	p->ps->width = (size_t)pagex;
517	p->ps->height = (size_t)pagey;
518	p->ps->header = pagey - (marginy / 2) - (lineheight / 2);
519	p->ps->top = pagey - marginy;
520	p->ps->footer = (marginy / 2) - (lineheight / 2);
521	p->ps->bottom = marginy;
522	p->ps->left = marginx;
523	p->ps->lineheight = lineheight;
524
525	p->defrmargin = pagex - (marginx * 2);
526	return(p);
527}
528
529
530void
531pspdf_free(void *arg)
532{
533	struct termp	*p;
534
535	p = (struct termp *)arg;
536
537	if (p->ps->psmarg)
538		free(p->ps->psmarg);
539	if (p->ps->pdfobjs)
540		free(p->ps->pdfobjs);
541
542	free(p->ps);
543	term_free(p);
544}
545
546
547static void
548ps_printf(struct termp *p, const char *fmt, ...)
549{
550	va_list		 ap;
551	int		 pos, len;
552
553	va_start(ap, fmt);
554
555	/*
556	 * If we're running in regular mode, then pipe directly into
557	 * vprintf().  If we're processing margins, then push the data
558	 * into our growable margin buffer.
559	 */
560
561	if ( ! (PS_MARGINS & p->ps->flags)) {
562		len = vprintf(fmt, ap);
563		va_end(ap);
564		p->ps->pdfbytes += /* LINTED */
565			len < 0 ? 0 : (size_t)len;
566		return;
567	}
568
569	/*
570	 * XXX: I assume that the in-margin print won't exceed
571	 * PS_BUFSLOP (128 bytes), which is reasonable but still an
572	 * assumption that will cause pukeage if it's not the case.
573	 */
574
575	ps_growbuf(p, PS_BUFSLOP);
576
577	pos = (int)p->ps->psmargcur;
578	vsnprintf(&p->ps->psmarg[pos], PS_BUFSLOP, fmt, ap);
579
580	va_end(ap);
581
582	p->ps->psmargcur = strlen(p->ps->psmarg);
583}
584
585
586static void
587ps_putchar(struct termp *p, char c)
588{
589	int		 pos;
590
591	/* See ps_printf(). */
592
593	if ( ! (PS_MARGINS & p->ps->flags)) {
594		/* LINTED */
595		putchar(c);
596		p->ps->pdfbytes++;
597		return;
598	}
599
600	ps_growbuf(p, 2);
601
602	pos = (int)p->ps->psmargcur++;
603	p->ps->psmarg[pos++] = c;
604	p->ps->psmarg[pos] = '\0';
605}
606
607
608static void
609pdf_obj(struct termp *p, size_t obj)
610{
611
612	assert(obj > 0);
613
614	if ((obj - 1) >= p->ps->pdfobjsz) {
615		p->ps->pdfobjsz = obj + 128;
616		p->ps->pdfobjs = realloc
617			(p->ps->pdfobjs,
618			 p->ps->pdfobjsz * sizeof(size_t));
619		if (NULL == p->ps->pdfobjs) {
620			perror(NULL);
621			exit((int)MANDOCLEVEL_SYSERR);
622		}
623	}
624
625	p->ps->pdfobjs[(int)obj - 1] = p->ps->pdfbytes;
626	ps_printf(p, "%zu 0 obj\n", obj);
627}
628
629
630static void
631ps_closepage(struct termp *p)
632{
633	int		 i;
634	size_t		 len, base;
635
636	/*
637	 * Close out a page that we've already flushed to output.  In
638	 * PostScript, we simply note that the page must be showed.  In
639	 * PDF, we must now create the Length, Resource, and Page node
640	 * for the page contents.
641	 */
642
643	assert(p->ps->psmarg && p->ps->psmarg[0]);
644	ps_printf(p, "%s", p->ps->psmarg);
645
646	if (TERMTYPE_PS != p->type) {
647		ps_printf(p, "ET\n");
648
649		len = p->ps->pdfbytes - p->ps->pdflastpg;
650		base = p->ps->pages * 4 + p->ps->pdfbody;
651
652		ps_printf(p, "endstream\nendobj\n");
653
654		/* Length of content. */
655		pdf_obj(p, base + 1);
656		ps_printf(p, "%zu\nendobj\n", len);
657
658		/* Resource for content. */
659		pdf_obj(p, base + 2);
660		ps_printf(p, "<<\n/ProcSet [/PDF /Text]\n");
661		ps_printf(p, "/Font <<\n");
662		for (i = 0; i < (int)TERMFONT__MAX; i++)
663			ps_printf(p, "/F%d %d 0 R\n", i, 3 + i);
664		ps_printf(p, ">>\n>>\n");
665
666		/* Page node. */
667		pdf_obj(p, base + 3);
668		ps_printf(p, "<<\n");
669		ps_printf(p, "/Type /Page\n");
670		ps_printf(p, "/Parent 2 0 R\n");
671		ps_printf(p, "/Resources %zu 0 R\n", base + 2);
672		ps_printf(p, "/Contents %zu 0 R\n", base);
673		ps_printf(p, ">>\nendobj\n");
674	} else
675		ps_printf(p, "showpage\n");
676
677	p->ps->pages++;
678	p->ps->psrow = p->ps->top;
679	assert( ! (PS_NEWPAGE & p->ps->flags));
680	p->ps->flags |= PS_NEWPAGE;
681}
682
683
684/* ARGSUSED */
685static void
686ps_end(struct termp *p)
687{
688	size_t		 i, xref, base;
689
690	/*
691	 * At the end of the file, do one last showpage.  This is the
692	 * same behaviour as groff(1) and works for multiple pages as
693	 * well as just one.
694	 */
695
696	if ( ! (PS_NEWPAGE & p->ps->flags)) {
697		assert(0 == p->ps->flags);
698		assert('\0' == p->ps->last);
699		ps_closepage(p);
700	}
701
702	if (TERMTYPE_PS == p->type) {
703		ps_printf(p, "%%%%Trailer\n");
704		ps_printf(p, "%%%%Pages: %zu\n", p->ps->pages);
705		ps_printf(p, "%%%%EOF\n");
706		return;
707	}
708
709	pdf_obj(p, 2);
710	ps_printf(p, "<<\n/Type /Pages\n");
711	ps_printf(p, "/MediaBox [0 0 %zu %zu]\n",
712			(size_t)AFM2PNT(p, p->ps->width),
713			(size_t)AFM2PNT(p, p->ps->height));
714
715	ps_printf(p, "/Count %zu\n", p->ps->pages);
716	ps_printf(p, "/Kids [");
717
718	for (i = 0; i < p->ps->pages; i++)
719		ps_printf(p, " %zu 0 R", i * 4 +
720				p->ps->pdfbody + 3);
721
722	base = (p->ps->pages - 1) * 4 +
723		p->ps->pdfbody + 4;
724
725	ps_printf(p, "]\n>>\nendobj\n");
726	pdf_obj(p, base);
727	ps_printf(p, "<<\n");
728	ps_printf(p, "/Type /Catalog\n");
729	ps_printf(p, "/Pages 2 0 R\n");
730	ps_printf(p, ">>\n");
731	xref = p->ps->pdfbytes;
732	ps_printf(p, "xref\n");
733	ps_printf(p, "0 %zu\n", base + 1);
734	ps_printf(p, "0000000000 65535 f \n");
735
736	for (i = 0; i < base; i++)
737		ps_printf(p, "%.10zu 00000 n \n",
738				p->ps->pdfobjs[(int)i]);
739
740	ps_printf(p, "trailer\n");
741	ps_printf(p, "<<\n");
742	ps_printf(p, "/Size %zu\n", base + 1);
743	ps_printf(p, "/Root %zu 0 R\n", base);
744	ps_printf(p, "/Info 1 0 R\n");
745	ps_printf(p, ">>\n");
746	ps_printf(p, "startxref\n");
747	ps_printf(p, "%zu\n", xref);
748	ps_printf(p, "%%%%EOF\n");
749}
750
751
752static void
753ps_begin(struct termp *p)
754{
755	time_t		 t;
756	int		 i;
757
758	/*
759	 * Print margins into margin buffer.  Nothing gets output to the
760	 * screen yet, so we don't need to initialise the primary state.
761	 */
762
763	if (p->ps->psmarg) {
764		assert(p->ps->psmargsz);
765		p->ps->psmarg[0] = '\0';
766	}
767
768	/*p->ps->pdfbytes = 0;*/
769	p->ps->psmargcur = 0;
770	p->ps->flags = PS_MARGINS;
771	p->ps->pscol = p->ps->left;
772	p->ps->psrow = p->ps->header;
773
774	ps_setfont(p, TERMFONT_NONE);
775
776	(*p->headf)(p, p->argf);
777	(*p->endline)(p);
778
779	p->ps->pscol = p->ps->left;
780	p->ps->psrow = p->ps->footer;
781
782	(*p->footf)(p, p->argf);
783	(*p->endline)(p);
784
785	p->ps->flags &= ~PS_MARGINS;
786
787	assert(0 == p->ps->flags);
788	assert(p->ps->psmarg);
789	assert('\0' != p->ps->psmarg[0]);
790
791	/*
792	 * Print header and initialise page state.  Following this,
793	 * stuff gets printed to the screen, so make sure we're sane.
794	 */
795
796	t = time(NULL);
797
798	if (TERMTYPE_PS == p->type) {
799		ps_printf(p, "%%!PS-Adobe-3.0\n");
800		ps_printf(p, "%%%%CreationDate: %s", ctime(&t));
801		ps_printf(p, "%%%%DocumentData: Clean7Bit\n");
802		ps_printf(p, "%%%%Orientation: Portrait\n");
803		ps_printf(p, "%%%%Pages: (atend)\n");
804		ps_printf(p, "%%%%PageOrder: Ascend\n");
805		ps_printf(p, "%%%%DocumentMedia: "
806				"Default %zu %zu 0 () ()\n",
807				(size_t)AFM2PNT(p, p->ps->width),
808				(size_t)AFM2PNT(p, p->ps->height));
809		ps_printf(p, "%%%%DocumentNeededResources: font");
810
811		for (i = 0; i < (int)TERMFONT__MAX; i++)
812			ps_printf(p, " %s", fonts[i].name);
813
814		ps_printf(p, "\n%%%%EndComments\n");
815	} else {
816		ps_printf(p, "%%PDF-1.1\n");
817		pdf_obj(p, 1);
818		ps_printf(p, "<<\n");
819		ps_printf(p, ">>\n");
820		ps_printf(p, "endobj\n");
821
822		for (i = 0; i < (int)TERMFONT__MAX; i++) {
823			pdf_obj(p, (size_t)i + 3);
824			ps_printf(p, "<<\n");
825			ps_printf(p, "/Type /Font\n");
826			ps_printf(p, "/Subtype /Type1\n");
827			ps_printf(p, "/Name /F%zu\n", i);
828			ps_printf(p, "/BaseFont /%s\n", fonts[i].name);
829			ps_printf(p, ">>\n");
830		}
831	}
832
833	p->ps->pdfbody = (size_t)TERMFONT__MAX + 3;
834	p->ps->pscol = p->ps->left;
835	p->ps->psrow = p->ps->top;
836	p->ps->flags |= PS_NEWPAGE;
837	ps_setfont(p, TERMFONT_NONE);
838}
839
840
841static void
842ps_pletter(struct termp *p, int c)
843{
844	int		 f;
845
846	/*
847	 * If we haven't opened a page context, then output that we're
848	 * in a new page and make sure the font is correctly set.
849	 */
850
851	if (PS_NEWPAGE & p->ps->flags) {
852		if (TERMTYPE_PS == p->type) {
853			ps_printf(p, "%%%%Page: %zu %zu\n",
854					p->ps->pages + 1,
855					p->ps->pages + 1);
856			ps_printf(p, "/%s %zu selectfont\n",
857					fonts[(int)p->ps->lastf].name,
858					p->ps->scale);
859		} else {
860			pdf_obj(p, p->ps->pdfbody +
861					p->ps->pages * 4);
862			ps_printf(p, "<<\n");
863			ps_printf(p, "/Length %zu 0 R\n",
864					p->ps->pdfbody + 1 +
865					p->ps->pages * 4);
866			ps_printf(p, ">>\nstream\n");
867		}
868		p->ps->pdflastpg = p->ps->pdfbytes;
869		p->ps->flags &= ~PS_NEWPAGE;
870	}
871
872	/*
873	 * If we're not in a PostScript "word" context, then open one
874	 * now at the current cursor.
875	 */
876
877	if ( ! (PS_INLINE & p->ps->flags)) {
878		if (TERMTYPE_PS != p->type) {
879			ps_printf(p, "BT\n/F%d %zu Tf\n",
880					(int)p->ps->lastf,
881					p->ps->scale);
882			ps_printf(p, "%.3f %.3f Td\n(",
883					AFM2PNT(p, p->ps->pscol),
884					AFM2PNT(p, p->ps->psrow));
885		} else
886			ps_printf(p, "%.3f %.3f moveto\n(",
887					AFM2PNT(p, p->ps->pscol),
888					AFM2PNT(p, p->ps->psrow));
889		p->ps->flags |= PS_INLINE;
890	}
891
892	assert( ! (PS_NEWPAGE & p->ps->flags));
893
894	/*
895	 * We need to escape these characters as per the PostScript
896	 * specification.  We would also escape non-graphable characters
897	 * (like tabs), but none of them would get to this point and
898	 * it's superfluous to abort() on them.
899	 */
900
901	switch (c) {
902	case ('('):
903		/* FALLTHROUGH */
904	case (')'):
905		/* FALLTHROUGH */
906	case ('\\'):
907		ps_putchar(p, '\\');
908		break;
909	default:
910		break;
911	}
912
913	/* Write the character and adjust where we are on the page. */
914
915	f = (int)p->ps->lastf;
916
917	if (c <= 32 || (c - 32 >= MAXCHAR)) {
918		ps_putchar(p, ' ');
919		p->ps->pscol += (size_t)fonts[f].gly[0].wx;
920		return;
921	}
922
923	ps_putchar(p, (char)c);
924	c -= 32;
925	p->ps->pscol += (size_t)fonts[f].gly[c].wx;
926}
927
928
929static void
930ps_pclose(struct termp *p)
931{
932
933	/*
934	 * Spit out that we're exiting a word context (this is a
935	 * "partial close" because we don't check the last-char buffer
936	 * or anything).
937	 */
938
939	if ( ! (PS_INLINE & p->ps->flags))
940		return;
941
942	if (TERMTYPE_PS != p->type) {
943		ps_printf(p, ") Tj\nET\n");
944	} else
945		ps_printf(p, ") show\n");
946
947	p->ps->flags &= ~PS_INLINE;
948}
949
950
951static void
952ps_fclose(struct termp *p)
953{
954
955	/*
956	 * Strong closure: if we have a last-char, spit it out after
957	 * checking that we're in the right font mode.  This will of
958	 * course open a new scope, if applicable.
959	 *
960	 * Following this, close out any scope that's open.
961	 */
962
963	if ('\0' != p->ps->last) {
964		if (p->ps->lastf != TERMFONT_NONE) {
965			ps_pclose(p);
966			ps_setfont(p, TERMFONT_NONE);
967		}
968		ps_pletter(p, p->ps->last);
969		p->ps->last = '\0';
970	}
971
972	if ( ! (PS_INLINE & p->ps->flags))
973		return;
974
975	ps_pclose(p);
976}
977
978
979static void
980ps_letter(struct termp *p, int arg)
981{
982	char		cc, c;
983
984	/* LINTED */
985	c = arg >= 128 || arg <= 0 ? '?' : arg;
986
987	/*
988	 * State machine dictates whether to buffer the last character
989	 * or not.  Basically, encoded words are detected by checking if
990	 * we're an "8" and switching on the buffer.  Then we put "8" in
991	 * our buffer, and on the next charater, flush both character
992	 * and buffer.  Thus, "regular" words are detected by having a
993	 * regular character and a regular buffer character.
994	 */
995
996	if ('\0' == p->ps->last) {
997		assert(8 != c);
998		p->ps->last = c;
999		return;
1000	} else if (8 == p->ps->last) {
1001		assert(8 != c);
1002		p->ps->last = '\0';
1003	} else if (8 == c) {
1004		assert(8 != p->ps->last);
1005		if ('_' == p->ps->last) {
1006			if (p->ps->lastf != TERMFONT_UNDER) {
1007				ps_pclose(p);
1008				ps_setfont(p, TERMFONT_UNDER);
1009			}
1010		} else if (p->ps->lastf != TERMFONT_BOLD) {
1011			ps_pclose(p);
1012			ps_setfont(p, TERMFONT_BOLD);
1013		}
1014		p->ps->last = c;
1015		return;
1016	} else {
1017		if (p->ps->lastf != TERMFONT_NONE) {
1018			ps_pclose(p);
1019			ps_setfont(p, TERMFONT_NONE);
1020		}
1021		cc = p->ps->last;
1022		p->ps->last = c;
1023		c = cc;
1024	}
1025
1026	ps_pletter(p, c);
1027}
1028
1029
1030static void
1031ps_advance(struct termp *p, size_t len)
1032{
1033
1034	/*
1035	 * Advance some spaces.  This can probably be made smarter,
1036	 * i.e., to have multiple space-separated words in the same
1037	 * scope, but this is easier:  just close out the current scope
1038	 * and readjust our column settings.
1039	 */
1040
1041	ps_fclose(p);
1042	p->ps->pscol += len;
1043}
1044
1045
1046static void
1047ps_endline(struct termp *p)
1048{
1049
1050	/* Close out any scopes we have open: we're at eoln. */
1051
1052	ps_fclose(p);
1053
1054	/*
1055	 * If we're in the margin, don't try to recalculate our current
1056	 * row.  XXX: if the column tries to be fancy with multiple
1057	 * lines, we'll do nasty stuff.
1058	 */
1059
1060	if (PS_MARGINS & p->ps->flags)
1061		return;
1062
1063	/* Left-justify. */
1064
1065	p->ps->pscol = p->ps->left;
1066
1067	/* If we haven't printed anything, return. */
1068
1069	if (PS_NEWPAGE & p->ps->flags)
1070		return;
1071
1072	/*
1073	 * Put us down a line.  If we're at the page bottom, spit out a
1074	 * showpage and restart our row.
1075	 */
1076
1077	if (p->ps->psrow >= p->ps->lineheight +
1078			p->ps->bottom) {
1079		p->ps->psrow -= p->ps->lineheight;
1080		return;
1081	}
1082
1083	ps_closepage(p);
1084}
1085
1086
1087static void
1088ps_setfont(struct termp *p, enum termfont f)
1089{
1090
1091	assert(f < TERMFONT__MAX);
1092	p->ps->lastf = f;
1093
1094	/*
1095	 * If we're still at the top of the page, let the font-setting
1096	 * be delayed until we actually have stuff to print.
1097	 */
1098
1099	if (PS_NEWPAGE & p->ps->flags)
1100		return;
1101
1102	if (TERMTYPE_PS == p->type)
1103		ps_printf(p, "/%s %zu selectfont\n",
1104				fonts[(int)f].name,
1105				p->ps->scale);
1106	else
1107		ps_printf(p, "/F%d %zu Tf\n",
1108				(int)f,
1109				p->ps->scale);
1110}
1111
1112
1113/* ARGSUSED */
1114static size_t
1115ps_width(const struct termp *p, int c)
1116{
1117
1118	if (c <= 32 || c - 32 >= MAXCHAR)
1119		return((size_t)fonts[(int)TERMFONT_NONE].gly[0].wx);
1120
1121	c -= 32;
1122	return((size_t)fonts[(int)TERMFONT_NONE].gly[c].wx);
1123}
1124
1125
1126static double
1127ps_hspan(const struct termp *p, const struct roffsu *su)
1128{
1129	double		 r;
1130
1131	/*
1132	 * All of these measurements are derived by converting from the
1133	 * native measurement to AFM units.
1134	 */
1135
1136	switch (su->unit) {
1137	case (SCALE_CM):
1138		r = PNT2AFM(p, su->scale * 28.34);
1139		break;
1140	case (SCALE_IN):
1141		r = PNT2AFM(p, su->scale * 72);
1142		break;
1143	case (SCALE_PC):
1144		r = PNT2AFM(p, su->scale * 12);
1145		break;
1146	case (SCALE_PT):
1147		r = PNT2AFM(p, su->scale * 100);
1148		break;
1149	case (SCALE_EM):
1150		r = su->scale *
1151			fonts[(int)TERMFONT_NONE].gly[109 - 32].wx;
1152		break;
1153	case (SCALE_MM):
1154		r = PNT2AFM(p, su->scale * 2.834);
1155		break;
1156	case (SCALE_EN):
1157		r = su->scale *
1158			fonts[(int)TERMFONT_NONE].gly[110 - 32].wx;
1159		break;
1160	case (SCALE_VS):
1161		r = su->scale * p->ps->lineheight;
1162		break;
1163	default:
1164		r = su->scale;
1165		break;
1166	}
1167
1168	return(r);
1169}
1170
1171static void
1172ps_growbuf(struct termp *p, size_t sz)
1173{
1174	if (p->ps->psmargcur + sz <= p->ps->psmargsz)
1175		return;
1176
1177	if (sz < PS_BUFSLOP)
1178		sz = PS_BUFSLOP;
1179
1180	p->ps->psmargsz += sz;
1181
1182	p->ps->psmarg = mandoc_realloc
1183		(p->ps->psmarg, p->ps->psmargsz);
1184}
1185
1186