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typo; noticed by jmc@ some time ago
[mandoc.git] / term_ps.c
1 /* $Id: term_ps.c,v 1.64 2014/08/13 20:34:29 kristaps Exp $ */
2 /*
3 * Copyright (c) 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
4 * Copyright (c) 2014 Ingo Schwarze <schwarze@openbsd.org>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18 #include "config.h"
19
20 #include <sys/types.h>
21
22 #include <assert.h>
23 #include <stdarg.h>
24 #include <stdint.h>
25 #include <stdio.h>
26 #include <stdlib.h>
27 #include <string.h>
28 #include <time.h>
29 #include <unistd.h>
30
31 #include "mandoc.h"
32 #include "mandoc_aux.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) \
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) \
46 ((double)(x) / (1000.0 / (double)(p)->ps->scale))
47
48 struct glyph {
49 unsigned short wx; /* WX in AFM */
50 };
51
52 struct 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
58 struct 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 lastwidth; /* page width before last ll */
78 size_t left; /* body left (AFM units) */
79 size_t header; /* header pos (AFM units) */
80 size_t footer; /* footer pos (AFM units) */
81 size_t pdfbytes; /* current output byte */
82 size_t pdflastpg; /* byte of last page mark */
83 size_t pdfbody; /* start of body object */
84 size_t *pdfobjs; /* table of object offsets */
85 size_t pdfobjsz; /* size of pdfobjs */
86 };
87
88 static double ps_hspan(const struct termp *,
89 const struct roffsu *);
90 static size_t ps_width(const struct termp *, int);
91 static void ps_advance(struct termp *, size_t);
92 static void ps_begin(struct termp *);
93 static void ps_closepage(struct termp *);
94 static void ps_end(struct termp *);
95 static void ps_endline(struct termp *);
96 static void ps_fclose(struct termp *);
97 static void ps_growbuf(struct termp *, size_t);
98 static void ps_letter(struct termp *, int);
99 static void ps_pclose(struct termp *);
100 static void ps_pletter(struct termp *, int);
101 #if __GNUC__ - 0 >= 4
102 __attribute__((__format__ (__printf__, 2, 3)))
103 #endif
104 static void ps_printf(struct termp *, const char *, ...);
105 static void ps_putchar(struct termp *, char);
106 static void ps_setfont(struct termp *, enum termfont);
107 static void ps_setwidth(struct termp *, int, size_t);
108 static struct termp *pspdf_alloc(char *);
109 static void pdf_obj(struct termp *, size_t);
110
111 /*
112 * We define, for the time being, three fonts: bold, oblique/italic, and
113 * normal (roman). The following table hard-codes the font metrics for
114 * ASCII, i.e., 32--127.
115 */
116
117 static const struct font fonts[TERMFONT__MAX] = {
118 { "Times-Roman", {
119 { 250 },
120 { 333 },
121 { 408 },
122 { 500 },
123 { 500 },
124 { 833 },
125 { 778 },
126 { 333 },
127 { 333 },
128 { 333 },
129 { 500 },
130 { 564 },
131 { 250 },
132 { 333 },
133 { 250 },
134 { 278 },
135 { 500 },
136 { 500 },
137 { 500 },
138 { 500 },
139 { 500 },
140 { 500 },
141 { 500 },
142 { 500 },
143 { 500 },
144 { 500 },
145 { 278 },
146 { 278 },
147 { 564 },
148 { 564 },
149 { 564 },
150 { 444 },
151 { 921 },
152 { 722 },
153 { 667 },
154 { 667 },
155 { 722 },
156 { 611 },
157 { 556 },
158 { 722 },
159 { 722 },
160 { 333 },
161 { 389 },
162 { 722 },
163 { 611 },
164 { 889 },
165 { 722 },
166 { 722 },
167 { 556 },
168 { 722 },
169 { 667 },
170 { 556 },
171 { 611 },
172 { 722 },
173 { 722 },
174 { 944 },
175 { 722 },
176 { 722 },
177 { 611 },
178 { 333 },
179 { 278 },
180 { 333 },
181 { 469 },
182 { 500 },
183 { 333 },
184 { 444 },
185 { 500 },
186 { 444 },
187 { 500},
188 { 444},
189 { 333},
190 { 500},
191 { 500},
192 { 278},
193 { 278},
194 { 500},
195 { 278},
196 { 778},
197 { 500},
198 { 500},
199 { 500},
200 { 500},
201 { 333},
202 { 389},
203 { 278},
204 { 500},
205 { 500},
206 { 722},
207 { 500},
208 { 500},
209 { 444},
210 { 480},
211 { 200},
212 { 480},
213 { 541},
214 } },
215 { "Times-Bold", {
216 { 250 },
217 { 333 },
218 { 555 },
219 { 500 },
220 { 500 },
221 { 1000 },
222 { 833 },
223 { 333 },
224 { 333 },
225 { 333 },
226 { 500 },
227 { 570 },
228 { 250 },
229 { 333 },
230 { 250 },
231 { 278 },
232 { 500 },
233 { 500 },
234 { 500 },
235 { 500 },
236 { 500 },
237 { 500 },
238 { 500 },
239 { 500 },
240 { 500 },
241 { 500 },
242 { 333 },
243 { 333 },
244 { 570 },
245 { 570 },
246 { 570 },
247 { 500 },
248 { 930 },
249 { 722 },
250 { 667 },
251 { 722 },
252 { 722 },
253 { 667 },
254 { 611 },
255 { 778 },
256 { 778 },
257 { 389 },
258 { 500 },
259 { 778 },
260 { 667 },
261 { 944 },
262 { 722 },
263 { 778 },
264 { 611 },
265 { 778 },
266 { 722 },
267 { 556 },
268 { 667 },
269 { 722 },
270 { 722 },
271 { 1000 },
272 { 722 },
273 { 722 },
274 { 667 },
275 { 333 },
276 { 278 },
277 { 333 },
278 { 581 },
279 { 500 },
280 { 333 },
281 { 500 },
282 { 556 },
283 { 444 },
284 { 556 },
285 { 444 },
286 { 333 },
287 { 500 },
288 { 556 },
289 { 278 },
290 { 333 },
291 { 556 },
292 { 278 },
293 { 833 },
294 { 556 },
295 { 500 },
296 { 556 },
297 { 556 },
298 { 444 },
299 { 389 },
300 { 333 },
301 { 556 },
302 { 500 },
303 { 722 },
304 { 500 },
305 { 500 },
306 { 444 },
307 { 394 },
308 { 220 },
309 { 394 },
310 { 520 },
311 } },
312 { "Times-Italic", {
313 { 250 },
314 { 333 },
315 { 420 },
316 { 500 },
317 { 500 },
318 { 833 },
319 { 778 },
320 { 333 },
321 { 333 },
322 { 333 },
323 { 500 },
324 { 675 },
325 { 250 },
326 { 333 },
327 { 250 },
328 { 278 },
329 { 500 },
330 { 500 },
331 { 500 },
332 { 500 },
333 { 500 },
334 { 500 },
335 { 500 },
336 { 500 },
337 { 500 },
338 { 500 },
339 { 333 },
340 { 333 },
341 { 675 },
342 { 675 },
343 { 675 },
344 { 500 },
345 { 920 },
346 { 611 },
347 { 611 },
348 { 667 },
349 { 722 },
350 { 611 },
351 { 611 },
352 { 722 },
353 { 722 },
354 { 333 },
355 { 444 },
356 { 667 },
357 { 556 },
358 { 833 },
359 { 667 },
360 { 722 },
361 { 611 },
362 { 722 },
363 { 611 },
364 { 500 },
365 { 556 },
366 { 722 },
367 { 611 },
368 { 833 },
369 { 611 },
370 { 556 },
371 { 556 },
372 { 389 },
373 { 278 },
374 { 389 },
375 { 422 },
376 { 500 },
377 { 333 },
378 { 500 },
379 { 500 },
380 { 444 },
381 { 500 },
382 { 444 },
383 { 278 },
384 { 500 },
385 { 500 },
386 { 278 },
387 { 278 },
388 { 444 },
389 { 278 },
390 { 722 },
391 { 500 },
392 { 500 },
393 { 500 },
394 { 500 },
395 { 389 },
396 { 389 },
397 { 278 },
398 { 500 },
399 { 444 },
400 { 667 },
401 { 444 },
402 { 444 },
403 { 389 },
404 { 400 },
405 { 275 },
406 { 400 },
407 { 541 },
408 } },
409 };
410
411 void *
412 pdf_alloc(char *outopts)
413 {
414 struct termp *p;
415
416 if (NULL != (p = pspdf_alloc(outopts)))
417 p->type = TERMTYPE_PDF;
418
419 return(p);
420 }
421
422 void *
423 ps_alloc(char *outopts)
424 {
425 struct termp *p;
426
427 if (NULL != (p = pspdf_alloc(outopts)))
428 p->type = TERMTYPE_PS;
429
430 return(p);
431 }
432
433 static struct termp *
434 pspdf_alloc(char *outopts)
435 {
436 struct termp *p;
437 unsigned int pagex, pagey;
438 size_t marginx, marginy, lineheight;
439 const char *toks[2];
440 const char *pp;
441 char *v;
442
443 p = mandoc_calloc(1, sizeof(struct termp));
444 p->enc = TERMENC_ASCII;
445 p->ps = mandoc_calloc(1, sizeof(struct termp_ps));
446
447 p->advance = ps_advance;
448 p->begin = ps_begin;
449 p->end = ps_end;
450 p->endline = ps_endline;
451 p->hspan = ps_hspan;
452 p->letter = ps_letter;
453 p->setwidth = ps_setwidth;
454 p->width = ps_width;
455
456 toks[0] = "paper";
457 toks[1] = NULL;
458
459 pp = NULL;
460
461 while (outopts && *outopts)
462 switch (getsubopt(&outopts, UNCONST(toks), &v)) {
463 case 0:
464 pp = v;
465 break;
466 default:
467 break;
468 }
469
470 /* Default to US letter (millimetres). */
471
472 pagex = 216;
473 pagey = 279;
474
475 /*
476 * The ISO-269 paper sizes can be calculated automatically, but
477 * it would require bringing in -lm for pow() and I'd rather not
478 * do that. So just do it the easy way for now. Since this
479 * only happens once, I'm not terribly concerned.
480 */
481
482 if (pp && strcasecmp(pp, "letter")) {
483 if (0 == strcasecmp(pp, "a3")) {
484 pagex = 297;
485 pagey = 420;
486 } else if (0 == strcasecmp(pp, "a4")) {
487 pagex = 210;
488 pagey = 297;
489 } else if (0 == strcasecmp(pp, "a5")) {
490 pagex = 148;
491 pagey = 210;
492 } else if (0 == strcasecmp(pp, "legal")) {
493 pagex = 216;
494 pagey = 356;
495 } else if (2 != sscanf(pp, "%ux%u", &pagex, &pagey))
496 fprintf(stderr, "%s: Unknown paper\n", pp);
497 }
498
499 /*
500 * This MUST be defined before any PNT2AFM or AFM2PNT
501 * calculations occur.
502 */
503
504 p->ps->scale = 11;
505
506 /* Remember millimetres -> AFM units. */
507
508 pagex = PNT2AFM(p, ((double)pagex * 2.834));
509 pagey = PNT2AFM(p, ((double)pagey * 2.834));
510
511 /* Margins are 1/9 the page x and y. */
512
513 marginx = (size_t)((double)pagex / 9.0);
514 marginy = (size_t)((double)pagey / 9.0);
515
516 /* Line-height is 1.4em. */
517
518 lineheight = PNT2AFM(p, ((double)p->ps->scale * 1.4));
519
520 p->ps->width = p->ps->lastwidth = (size_t)pagex;
521 p->ps->height = (size_t)pagey;
522 p->ps->header = pagey - (marginy / 2) - (lineheight / 2);
523 p->ps->top = pagey - marginy;
524 p->ps->footer = (marginy / 2) - (lineheight / 2);
525 p->ps->bottom = marginy;
526 p->ps->left = marginx;
527 p->ps->lineheight = lineheight;
528
529 p->defrmargin = pagex - (marginx * 2);
530 return(p);
531 }
532
533 static void
534 ps_setwidth(struct termp *p, int iop, size_t width)
535 {
536 size_t lastwidth;
537
538 lastwidth = p->ps->width;
539 if (0 < iop)
540 p->ps->width += width;
541 else if (0 > iop)
542 p->ps->width -= width;
543 else
544 p->ps->width = width ? width : p->ps->lastwidth;
545 p->ps->lastwidth = lastwidth;
546 }
547
548 void
549 pspdf_free(void *arg)
550 {
551 struct termp *p;
552
553 p = (struct termp *)arg;
554
555 if (p->ps->psmarg)
556 free(p->ps->psmarg);
557 if (p->ps->pdfobjs)
558 free(p->ps->pdfobjs);
559
560 free(p->ps);
561 term_free(p);
562 }
563
564 static void
565 ps_printf(struct termp *p, const char *fmt, ...)
566 {
567 va_list ap;
568 int pos, len;
569
570 va_start(ap, fmt);
571
572 /*
573 * If we're running in regular mode, then pipe directly into
574 * vprintf(). If we're processing margins, then push the data
575 * into our growable margin buffer.
576 */
577
578 if ( ! (PS_MARGINS & p->ps->flags)) {
579 len = vprintf(fmt, ap);
580 va_end(ap);
581 p->ps->pdfbytes += len < 0 ? 0 : (size_t)len;
582 return;
583 }
584
585 /*
586 * XXX: I assume that the in-margin print won't exceed
587 * PS_BUFSLOP (128 bytes), which is reasonable but still an
588 * assumption that will cause pukeage if it's not the case.
589 */
590
591 ps_growbuf(p, PS_BUFSLOP);
592
593 pos = (int)p->ps->psmargcur;
594 vsnprintf(&p->ps->psmarg[pos], PS_BUFSLOP, fmt, ap);
595
596 va_end(ap);
597
598 p->ps->psmargcur = strlen(p->ps->psmarg);
599 }
600
601 static void
602 ps_putchar(struct termp *p, char c)
603 {
604 int pos;
605
606 /* See ps_printf(). */
607
608 if ( ! (PS_MARGINS & p->ps->flags)) {
609 putchar(c);
610 p->ps->pdfbytes++;
611 return;
612 }
613
614 ps_growbuf(p, 2);
615
616 pos = (int)p->ps->psmargcur++;
617 p->ps->psmarg[pos++] = c;
618 p->ps->psmarg[pos] = '\0';
619 }
620
621 static void
622 pdf_obj(struct termp *p, size_t obj)
623 {
624
625 assert(obj > 0);
626
627 if ((obj - 1) >= p->ps->pdfobjsz) {
628 p->ps->pdfobjsz = obj + 128;
629 p->ps->pdfobjs = mandoc_reallocarray(p->ps->pdfobjs,
630 p->ps->pdfobjsz, sizeof(size_t));
631 }
632
633 p->ps->pdfobjs[(int)obj - 1] = p->ps->pdfbytes;
634 ps_printf(p, "%zu 0 obj\n", obj);
635 }
636
637 static void
638 ps_closepage(struct termp *p)
639 {
640 int i;
641 size_t len, base;
642
643 /*
644 * Close out a page that we've already flushed to output. In
645 * PostScript, we simply note that the page must be showed. In
646 * PDF, we must now create the Length, Resource, and Page node
647 * for the page contents.
648 */
649
650 assert(p->ps->psmarg && p->ps->psmarg[0]);
651 ps_printf(p, "%s", p->ps->psmarg);
652
653 if (TERMTYPE_PS != p->type) {
654 ps_printf(p, "ET\n");
655
656 len = p->ps->pdfbytes - p->ps->pdflastpg;
657 base = p->ps->pages * 4 + p->ps->pdfbody;
658
659 ps_printf(p, "endstream\nendobj\n");
660
661 /* Length of content. */
662 pdf_obj(p, base + 1);
663 ps_printf(p, "%zu\nendobj\n", len);
664
665 /* Resource for content. */
666 pdf_obj(p, base + 2);
667 ps_printf(p, "<<\n/ProcSet [/PDF /Text]\n");
668 ps_printf(p, "/Font <<\n");
669 for (i = 0; i < (int)TERMFONT__MAX; i++)
670 ps_printf(p, "/F%d %d 0 R\n", i, 3 + i);
671 ps_printf(p, ">>\n>>\n");
672
673 /* Page node. */
674 pdf_obj(p, base + 3);
675 ps_printf(p, "<<\n");
676 ps_printf(p, "/Type /Page\n");
677 ps_printf(p, "/Parent 2 0 R\n");
678 ps_printf(p, "/Resources %zu 0 R\n", base + 2);
679 ps_printf(p, "/Contents %zu 0 R\n", base);
680 ps_printf(p, ">>\nendobj\n");
681 } else
682 ps_printf(p, "showpage\n");
683
684 p->ps->pages++;
685 p->ps->psrow = p->ps->top;
686 assert( ! (PS_NEWPAGE & p->ps->flags));
687 p->ps->flags |= PS_NEWPAGE;
688 }
689
690 static void
691 ps_end(struct termp *p)
692 {
693 size_t i, xref, base;
694
695 /*
696 * At the end of the file, do one last showpage. This is the
697 * same behaviour as groff(1) and works for multiple pages as
698 * well as just one.
699 */
700
701 if ( ! (PS_NEWPAGE & p->ps->flags)) {
702 assert(0 == p->ps->flags);
703 assert('\0' == p->ps->last);
704 ps_closepage(p);
705 }
706
707 if (TERMTYPE_PS == p->type) {
708 ps_printf(p, "%%%%Trailer\n");
709 ps_printf(p, "%%%%Pages: %zu\n", p->ps->pages);
710 ps_printf(p, "%%%%EOF\n");
711 return;
712 }
713
714 pdf_obj(p, 2);
715 ps_printf(p, "<<\n/Type /Pages\n");
716 ps_printf(p, "/MediaBox [0 0 %zu %zu]\n",
717 (size_t)AFM2PNT(p, p->ps->width),
718 (size_t)AFM2PNT(p, p->ps->height));
719
720 ps_printf(p, "/Count %zu\n", p->ps->pages);
721 ps_printf(p, "/Kids [");
722
723 for (i = 0; i < p->ps->pages; i++)
724 ps_printf(p, " %zu 0 R", i * 4 + p->ps->pdfbody + 3);
725
726 base = (p->ps->pages - 1) * 4 + p->ps->pdfbody + 4;
727
728 ps_printf(p, "]\n>>\nendobj\n");
729 pdf_obj(p, base);
730 ps_printf(p, "<<\n");
731 ps_printf(p, "/Type /Catalog\n");
732 ps_printf(p, "/Pages 2 0 R\n");
733 ps_printf(p, ">>\n");
734 xref = p->ps->pdfbytes;
735 ps_printf(p, "xref\n");
736 ps_printf(p, "0 %zu\n", base + 1);
737 ps_printf(p, "0000000000 65535 f \n");
738
739 for (i = 0; i < base; i++)
740 ps_printf(p, "%.10zu 00000 n \n",
741 p->ps->pdfobjs[(int)i]);
742
743 ps_printf(p, "trailer\n");
744 ps_printf(p, "<<\n");
745 ps_printf(p, "/Size %zu\n", base + 1);
746 ps_printf(p, "/Root %zu 0 R\n", base);
747 ps_printf(p, "/Info 1 0 R\n");
748 ps_printf(p, ">>\n");
749 ps_printf(p, "startxref\n");
750 ps_printf(p, "%zu\n", xref);
751 ps_printf(p, "%%%%EOF\n");
752 }
753
754 static void
755 ps_begin(struct termp *p)
756 {
757 time_t t;
758 int i;
759
760 /*
761 * Print margins into margin buffer. Nothing gets output to the
762 * screen yet, so we don't need to initialise the primary state.
763 */
764
765 if (p->ps->psmarg) {
766 assert(p->ps->psmargsz);
767 p->ps->psmarg[0] = '\0';
768 }
769
770 /*p->ps->pdfbytes = 0;*/
771 p->ps->psmargcur = 0;
772 p->ps->flags = PS_MARGINS;
773 p->ps->pscol = p->ps->left;
774 p->ps->psrow = p->ps->header;
775
776 ps_setfont(p, TERMFONT_NONE);
777
778 (*p->headf)(p, p->argf);
779 (*p->endline)(p);
780
781 p->ps->pscol = p->ps->left;
782 p->ps->psrow = p->ps->footer;
783
784 (*p->footf)(p, p->argf);
785 (*p->endline)(p);
786
787 p->ps->flags &= ~PS_MARGINS;
788
789 assert(0 == p->ps->flags);
790 assert(p->ps->psmarg);
791 assert('\0' != p->ps->psmarg[0]);
792
793 /*
794 * Print header and initialise page state. Following this,
795 * stuff gets printed to the screen, so make sure we're sane.
796 */
797
798 t = time(NULL);
799
800 if (TERMTYPE_PS == p->type) {
801 ps_printf(p, "%%!PS-Adobe-3.0\n");
802 ps_printf(p, "%%%%CreationDate: %s", ctime(&t));
803 ps_printf(p, "%%%%DocumentData: Clean7Bit\n");
804 ps_printf(p, "%%%%Orientation: Portrait\n");
805 ps_printf(p, "%%%%Pages: (atend)\n");
806 ps_printf(p, "%%%%PageOrder: Ascend\n");
807 ps_printf(p, "%%%%DocumentMedia: "
808 "Default %zu %zu 0 () ()\n",
809 (size_t)AFM2PNT(p, p->ps->width),
810 (size_t)AFM2PNT(p, p->ps->height));
811 ps_printf(p, "%%%%DocumentNeededResources: font");
812
813 for (i = 0; i < (int)TERMFONT__MAX; i++)
814 ps_printf(p, " %s", fonts[i].name);
815
816 ps_printf(p, "\n%%%%EndComments\n");
817 } else {
818 ps_printf(p, "%%PDF-1.1\n");
819 pdf_obj(p, 1);
820 ps_printf(p, "<<\n");
821 ps_printf(p, ">>\n");
822 ps_printf(p, "endobj\n");
823
824 for (i = 0; i < (int)TERMFONT__MAX; i++) {
825 pdf_obj(p, (size_t)i + 3);
826 ps_printf(p, "<<\n");
827 ps_printf(p, "/Type /Font\n");
828 ps_printf(p, "/Subtype /Type1\n");
829 ps_printf(p, "/Name /F%d\n", i);
830 ps_printf(p, "/BaseFont /%s\n", fonts[i].name);
831 ps_printf(p, ">>\n");
832 }
833 }
834
835 p->ps->pdfbody = (size_t)TERMFONT__MAX + 3;
836 p->ps->pscol = p->ps->left;
837 p->ps->psrow = p->ps->top;
838 p->ps->flags |= PS_NEWPAGE;
839 ps_setfont(p, TERMFONT_NONE);
840 }
841
842 static void
843 ps_pletter(struct termp *p, int c)
844 {
845 int f;
846
847 /*
848 * If we haven't opened a page context, then output that we're
849 * in a new page and make sure the font is correctly set.
850 */
851
852 if (PS_NEWPAGE & p->ps->flags) {
853 if (TERMTYPE_PS == p->type) {
854 ps_printf(p, "%%%%Page: %zu %zu\n",
855 p->ps->pages + 1, 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 + p->ps->pages * 4);
865 ps_printf(p, ">>\nstream\n");
866 }
867 p->ps->pdflastpg = p->ps->pdfbytes;
868 p->ps->flags &= ~PS_NEWPAGE;
869 }
870
871 /*
872 * If we're not in a PostScript "word" context, then open one
873 * now at the current cursor.
874 */
875
876 if ( ! (PS_INLINE & p->ps->flags)) {
877 if (TERMTYPE_PS != p->type) {
878 ps_printf(p, "BT\n/F%d %zu Tf\n",
879 (int)p->ps->lastf, p->ps->scale);
880 ps_printf(p, "%.3f %.3f Td\n(",
881 AFM2PNT(p, p->ps->pscol),
882 AFM2PNT(p, p->ps->psrow));
883 } else
884 ps_printf(p, "%.3f %.3f moveto\n(",
885 AFM2PNT(p, p->ps->pscol),
886 AFM2PNT(p, p->ps->psrow));
887 p->ps->flags |= PS_INLINE;
888 }
889
890 assert( ! (PS_NEWPAGE & p->ps->flags));
891
892 /*
893 * We need to escape these characters as per the PostScript
894 * specification. We would also escape non-graphable characters
895 * (like tabs), but none of them would get to this point and
896 * it's superfluous to abort() on them.
897 */
898
899 switch (c) {
900 case '(':
901 /* FALLTHROUGH */
902 case ')':
903 /* FALLTHROUGH */
904 case '\\':
905 ps_putchar(p, '\\');
906 break;
907 default:
908 break;
909 }
910
911 /* Write the character and adjust where we are on the page. */
912
913 f = (int)p->ps->lastf;
914
915 if (c <= 32 || c - 32 >= MAXCHAR)
916 c = 32;
917
918 ps_putchar(p, (char)c);
919 c -= 32;
920 p->ps->pscol += (size_t)fonts[f].gly[c].wx;
921 }
922
923 static void
924 ps_pclose(struct termp *p)
925 {
926
927 /*
928 * Spit out that we're exiting a word context (this is a
929 * "partial close" because we don't check the last-char buffer
930 * or anything).
931 */
932
933 if ( ! (PS_INLINE & p->ps->flags))
934 return;
935
936 if (TERMTYPE_PS != p->type) {
937 ps_printf(p, ") Tj\nET\n");
938 } else
939 ps_printf(p, ") show\n");
940
941 p->ps->flags &= ~PS_INLINE;
942 }
943
944 static void
945 ps_fclose(struct termp *p)
946 {
947
948 /*
949 * Strong closure: if we have a last-char, spit it out after
950 * checking that we're in the right font mode. This will of
951 * course open a new scope, if applicable.
952 *
953 * Following this, close out any scope that's open.
954 */
955
956 if ('\0' != p->ps->last) {
957 if (p->ps->lastf != TERMFONT_NONE) {
958 ps_pclose(p);
959 ps_setfont(p, TERMFONT_NONE);
960 }
961 ps_pletter(p, p->ps->last);
962 p->ps->last = '\0';
963 }
964
965 if ( ! (PS_INLINE & p->ps->flags))
966 return;
967
968 ps_pclose(p);
969 }
970
971 static void
972 ps_letter(struct termp *p, int arg)
973 {
974 char cc, c;
975
976 c = arg >= 128 || arg <= 0 ? '?' : arg;
977
978 /*
979 * State machine dictates whether to buffer the last character
980 * or not. Basically, encoded words are detected by checking if
981 * we're an "8" and switching on the buffer. Then we put "8" in
982 * our buffer, and on the next charater, flush both character
983 * and buffer. Thus, "regular" words are detected by having a
984 * regular character and a regular buffer character.
985 */
986
987 if ('\0' == p->ps->last) {
988 assert(8 != c);
989 p->ps->last = c;
990 return;
991 } else if (8 == p->ps->last) {
992 assert(8 != c);
993 p->ps->last = '\0';
994 } else if (8 == c) {
995 assert(8 != p->ps->last);
996 if ('_' == p->ps->last) {
997 if (p->ps->lastf != TERMFONT_UNDER) {
998 ps_pclose(p);
999 ps_setfont(p, TERMFONT_UNDER);
1000 }
1001 } else if (p->ps->lastf != TERMFONT_BOLD) {
1002 ps_pclose(p);
1003 ps_setfont(p, TERMFONT_BOLD);
1004 }
1005 p->ps->last = c;
1006 return;
1007 } else {
1008 if (p->ps->lastf != TERMFONT_NONE) {
1009 ps_pclose(p);
1010 ps_setfont(p, TERMFONT_NONE);
1011 }
1012 cc = p->ps->last;
1013 p->ps->last = c;
1014 c = cc;
1015 }
1016
1017 ps_pletter(p, c);
1018 }
1019
1020 static void
1021 ps_advance(struct termp *p, size_t len)
1022 {
1023
1024 /*
1025 * Advance some spaces. This can probably be made smarter,
1026 * i.e., to have multiple space-separated words in the same
1027 * scope, but this is easier: just close out the current scope
1028 * and readjust our column settings.
1029 */
1030
1031 ps_fclose(p);
1032 p->ps->pscol += len;
1033 }
1034
1035 static void
1036 ps_endline(struct termp *p)
1037 {
1038
1039 /* Close out any scopes we have open: we're at eoln. */
1040
1041 ps_fclose(p);
1042
1043 /*
1044 * If we're in the margin, don't try to recalculate our current
1045 * row. XXX: if the column tries to be fancy with multiple
1046 * lines, we'll do nasty stuff.
1047 */
1048
1049 if (PS_MARGINS & p->ps->flags)
1050 return;
1051
1052 /* Left-justify. */
1053
1054 p->ps->pscol = p->ps->left;
1055
1056 /* If we haven't printed anything, return. */
1057
1058 if (PS_NEWPAGE & p->ps->flags)
1059 return;
1060
1061 /*
1062 * Put us down a line. If we're at the page bottom, spit out a
1063 * showpage and restart our row.
1064 */
1065
1066 if (p->ps->psrow >= p->ps->lineheight + p->ps->bottom) {
1067 p->ps->psrow -= p->ps->lineheight;
1068 return;
1069 }
1070
1071 ps_closepage(p);
1072 }
1073
1074 static void
1075 ps_setfont(struct termp *p, enum termfont f)
1076 {
1077
1078 assert(f < TERMFONT__MAX);
1079 p->ps->lastf = f;
1080
1081 /*
1082 * If we're still at the top of the page, let the font-setting
1083 * be delayed until we actually have stuff to print.
1084 */
1085
1086 if (PS_NEWPAGE & p->ps->flags)
1087 return;
1088
1089 if (TERMTYPE_PS == p->type)
1090 ps_printf(p, "/%s %zu selectfont\n",
1091 fonts[(int)f].name, p->ps->scale);
1092 else
1093 ps_printf(p, "/F%d %zu Tf\n",
1094 (int)f, p->ps->scale);
1095 }
1096
1097 static size_t
1098 ps_width(const struct termp *p, int c)
1099 {
1100
1101 if (c <= 32 || c - 32 >= MAXCHAR)
1102 c = 0;
1103 else
1104 c -= 32;
1105
1106 return((size_t)fonts[(int)TERMFONT_NONE].gly[c].wx);
1107 }
1108
1109 static double
1110 ps_hspan(const struct termp *p, const struct roffsu *su)
1111 {
1112 double r;
1113
1114 /*
1115 * All of these measurements are derived by converting from the
1116 * native measurement to AFM units.
1117 */
1118 switch (su->unit) {
1119 case SCALE_BU:
1120 /*
1121 * Traditionally, the default unit is fixed to the
1122 * output media. So this would refer to the point. In
1123 * mandoc(1), however, we stick to the default terminal
1124 * scaling unit so that output is the same regardless
1125 * the media.
1126 */
1127 r = PNT2AFM(p, su->scale * 72.0 / 240.0);
1128 break;
1129 case SCALE_CM:
1130 r = PNT2AFM(p, su->scale * 72.0 / 2.54);
1131 break;
1132 case SCALE_EM:
1133 r = su->scale *
1134 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx;
1135 break;
1136 case SCALE_EN:
1137 r = su->scale *
1138 fonts[(int)TERMFONT_NONE].gly[110 - 32].wx;
1139 break;
1140 case SCALE_IN:
1141 r = PNT2AFM(p, su->scale * 72.0);
1142 break;
1143 case SCALE_MM:
1144 r = su->scale *
1145 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx / 100.0;
1146 break;
1147 case SCALE_PC:
1148 r = PNT2AFM(p, su->scale * 12.0);
1149 break;
1150 case SCALE_PT:
1151 r = PNT2AFM(p, su->scale * 1.0);
1152 break;
1153 case SCALE_VS:
1154 r = su->scale * p->ps->lineheight;
1155 break;
1156 default:
1157 r = su->scale;
1158 break;
1159 }
1160
1161 return(r);
1162 }
1163
1164 static void
1165 ps_growbuf(struct termp *p, size_t sz)
1166 {
1167 if (p->ps->psmargcur + sz <= p->ps->psmargsz)
1168 return;
1169
1170 if (sz < PS_BUFSLOP)
1171 sz = PS_BUFSLOP;
1172
1173 p->ps->psmargsz += sz;
1174 p->ps->psmarg = mandoc_realloc(p->ps->psmarg, p->ps->psmargsz);
1175 }
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