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Unify mdoc_deroff() and man_deroff() into a common function deroff().
[mandoc.git] / term_ps.c
1 /* $Id: term_ps.c,v 1.74 2015/04/04 17:47:18 schwarze Exp $ */
2 /*
3 * Copyright (c) 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
4 * Copyright (c) 2014, 2015 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 AUTHORS DISCLAIM ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS 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 <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 char *psmarg; /* margin buf */
67 size_t psmargsz; /* margin buf size */
68 size_t psmargcur; /* cur index in margin buf */
69 char last; /* last non-backspace seen */
70 enum termfont lastf; /* last set font */
71 enum termfont nextf; /* building next font here */
72 size_t scale; /* font scaling factor */
73 size_t pages; /* number of pages shown */
74 size_t lineheight; /* line height (AFM units) */
75 size_t top; /* body top (AFM units) */
76 size_t bottom; /* body bottom (AFM units) */
77 size_t height; /* page height (AFM units */
78 size_t width; /* page width (AFM units) */
79 size_t lastwidth; /* page width before last ll */
80 size_t left; /* body left (AFM units) */
81 size_t header; /* header pos (AFM units) */
82 size_t footer; /* footer pos (AFM units) */
83 size_t pdfbytes; /* current output byte */
84 size_t pdflastpg; /* byte of last page mark */
85 size_t pdfbody; /* start of body object */
86 size_t *pdfobjs; /* table of object offsets */
87 size_t pdfobjsz; /* size of pdfobjs */
88 };
89
90 static int ps_hspan(const struct termp *,
91 const struct roffsu *);
92 static size_t ps_width(const struct termp *, int);
93 static void ps_advance(struct termp *, size_t);
94 static void ps_begin(struct termp *);
95 static void ps_closepage(struct termp *);
96 static void ps_end(struct termp *);
97 static void ps_endline(struct termp *);
98 static void ps_fclose(struct termp *);
99 static void ps_growbuf(struct termp *, size_t);
100 static void ps_letter(struct termp *, int);
101 static void ps_pclose(struct termp *);
102 static void ps_pletter(struct termp *, int);
103 #if __GNUC__ - 0 >= 4
104 __attribute__((__format__ (__printf__, 2, 3)))
105 #endif
106 static void ps_printf(struct termp *, const char *, ...);
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 mchars *,
111 const struct manoutput *);
112 static void pdf_obj(struct termp *, size_t);
113
114 /*
115 * We define, for the time being, three fonts: bold, oblique/italic, and
116 * normal (roman). The following table hard-codes the font metrics for
117 * ASCII, i.e., 32--127.
118 */
119
120 static const struct font fonts[TERMFONT__MAX] = {
121 { "Times-Roman", {
122 { 250 },
123 { 333 },
124 { 408 },
125 { 500 },
126 { 500 },
127 { 833 },
128 { 778 },
129 { 333 },
130 { 333 },
131 { 333 },
132 { 500 },
133 { 564 },
134 { 250 },
135 { 333 },
136 { 250 },
137 { 278 },
138 { 500 },
139 { 500 },
140 { 500 },
141 { 500 },
142 { 500 },
143 { 500 },
144 { 500 },
145 { 500 },
146 { 500 },
147 { 500 },
148 { 278 },
149 { 278 },
150 { 564 },
151 { 564 },
152 { 564 },
153 { 444 },
154 { 921 },
155 { 722 },
156 { 667 },
157 { 667 },
158 { 722 },
159 { 611 },
160 { 556 },
161 { 722 },
162 { 722 },
163 { 333 },
164 { 389 },
165 { 722 },
166 { 611 },
167 { 889 },
168 { 722 },
169 { 722 },
170 { 556 },
171 { 722 },
172 { 667 },
173 { 556 },
174 { 611 },
175 { 722 },
176 { 722 },
177 { 944 },
178 { 722 },
179 { 722 },
180 { 611 },
181 { 333 },
182 { 278 },
183 { 333 },
184 { 469 },
185 { 500 },
186 { 333 },
187 { 444 },
188 { 500 },
189 { 444 },
190 { 500},
191 { 444},
192 { 333},
193 { 500},
194 { 500},
195 { 278},
196 { 278},
197 { 500},
198 { 278},
199 { 778},
200 { 500},
201 { 500},
202 { 500},
203 { 500},
204 { 333},
205 { 389},
206 { 278},
207 { 500},
208 { 500},
209 { 722},
210 { 500},
211 { 500},
212 { 444},
213 { 480},
214 { 200},
215 { 480},
216 { 541},
217 } },
218 { "Times-Bold", {
219 { 250 },
220 { 333 },
221 { 555 },
222 { 500 },
223 { 500 },
224 { 1000 },
225 { 833 },
226 { 333 },
227 { 333 },
228 { 333 },
229 { 500 },
230 { 570 },
231 { 250 },
232 { 333 },
233 { 250 },
234 { 278 },
235 { 500 },
236 { 500 },
237 { 500 },
238 { 500 },
239 { 500 },
240 { 500 },
241 { 500 },
242 { 500 },
243 { 500 },
244 { 500 },
245 { 333 },
246 { 333 },
247 { 570 },
248 { 570 },
249 { 570 },
250 { 500 },
251 { 930 },
252 { 722 },
253 { 667 },
254 { 722 },
255 { 722 },
256 { 667 },
257 { 611 },
258 { 778 },
259 { 778 },
260 { 389 },
261 { 500 },
262 { 778 },
263 { 667 },
264 { 944 },
265 { 722 },
266 { 778 },
267 { 611 },
268 { 778 },
269 { 722 },
270 { 556 },
271 { 667 },
272 { 722 },
273 { 722 },
274 { 1000 },
275 { 722 },
276 { 722 },
277 { 667 },
278 { 333 },
279 { 278 },
280 { 333 },
281 { 581 },
282 { 500 },
283 { 333 },
284 { 500 },
285 { 556 },
286 { 444 },
287 { 556 },
288 { 444 },
289 { 333 },
290 { 500 },
291 { 556 },
292 { 278 },
293 { 333 },
294 { 556 },
295 { 278 },
296 { 833 },
297 { 556 },
298 { 500 },
299 { 556 },
300 { 556 },
301 { 444 },
302 { 389 },
303 { 333 },
304 { 556 },
305 { 500 },
306 { 722 },
307 { 500 },
308 { 500 },
309 { 444 },
310 { 394 },
311 { 220 },
312 { 394 },
313 { 520 },
314 } },
315 { "Times-Italic", {
316 { 250 },
317 { 333 },
318 { 420 },
319 { 500 },
320 { 500 },
321 { 833 },
322 { 778 },
323 { 333 },
324 { 333 },
325 { 333 },
326 { 500 },
327 { 675 },
328 { 250 },
329 { 333 },
330 { 250 },
331 { 278 },
332 { 500 },
333 { 500 },
334 { 500 },
335 { 500 },
336 { 500 },
337 { 500 },
338 { 500 },
339 { 500 },
340 { 500 },
341 { 500 },
342 { 333 },
343 { 333 },
344 { 675 },
345 { 675 },
346 { 675 },
347 { 500 },
348 { 920 },
349 { 611 },
350 { 611 },
351 { 667 },
352 { 722 },
353 { 611 },
354 { 611 },
355 { 722 },
356 { 722 },
357 { 333 },
358 { 444 },
359 { 667 },
360 { 556 },
361 { 833 },
362 { 667 },
363 { 722 },
364 { 611 },
365 { 722 },
366 { 611 },
367 { 500 },
368 { 556 },
369 { 722 },
370 { 611 },
371 { 833 },
372 { 611 },
373 { 556 },
374 { 556 },
375 { 389 },
376 { 278 },
377 { 389 },
378 { 422 },
379 { 500 },
380 { 333 },
381 { 500 },
382 { 500 },
383 { 444 },
384 { 500 },
385 { 444 },
386 { 278 },
387 { 500 },
388 { 500 },
389 { 278 },
390 { 278 },
391 { 444 },
392 { 278 },
393 { 722 },
394 { 500 },
395 { 500 },
396 { 500 },
397 { 500 },
398 { 389 },
399 { 389 },
400 { 278 },
401 { 500 },
402 { 444 },
403 { 667 },
404 { 444 },
405 { 444 },
406 { 389 },
407 { 400 },
408 { 275 },
409 { 400 },
410 { 541 },
411 } },
412 { "Times-BoldItalic", {
413 { 250 },
414 { 389 },
415 { 555 },
416 { 500 },
417 { 500 },
418 { 833 },
419 { 778 },
420 { 333 },
421 { 333 },
422 { 333 },
423 { 500 },
424 { 570 },
425 { 250 },
426 { 333 },
427 { 250 },
428 { 278 },
429 { 500 },
430 { 500 },
431 { 500 },
432 { 500 },
433 { 500 },
434 { 500 },
435 { 500 },
436 { 500 },
437 { 500 },
438 { 500 },
439 { 333 },
440 { 333 },
441 { 570 },
442 { 570 },
443 { 570 },
444 { 500 },
445 { 832 },
446 { 667 },
447 { 667 },
448 { 667 },
449 { 722 },
450 { 667 },
451 { 667 },
452 { 722 },
453 { 778 },
454 { 389 },
455 { 500 },
456 { 667 },
457 { 611 },
458 { 889 },
459 { 722 },
460 { 722 },
461 { 611 },
462 { 722 },
463 { 667 },
464 { 556 },
465 { 611 },
466 { 722 },
467 { 667 },
468 { 889 },
469 { 667 },
470 { 611 },
471 { 611 },
472 { 333 },
473 { 278 },
474 { 333 },
475 { 570 },
476 { 500 },
477 { 333 },
478 { 500 },
479 { 500 },
480 { 444 },
481 { 500 },
482 { 444 },
483 { 333 },
484 { 500 },
485 { 556 },
486 { 278 },
487 { 278 },
488 { 500 },
489 { 278 },
490 { 778 },
491 { 556 },
492 { 500 },
493 { 500 },
494 { 500 },
495 { 389 },
496 { 389 },
497 { 278 },
498 { 556 },
499 { 444 },
500 { 667 },
501 { 500 },
502 { 444 },
503 { 389 },
504 { 348 },
505 { 220 },
506 { 348 },
507 { 570 },
508 } },
509 };
510
511 void *
512 pdf_alloc(const struct mchars *mchars, const struct manoutput *outopts)
513 {
514 struct termp *p;
515
516 if (NULL != (p = pspdf_alloc(mchars, outopts)))
517 p->type = TERMTYPE_PDF;
518
519 return(p);
520 }
521
522 void *
523 ps_alloc(const struct mchars *mchars, const struct manoutput *outopts)
524 {
525 struct termp *p;
526
527 if (NULL != (p = pspdf_alloc(mchars, outopts)))
528 p->type = TERMTYPE_PS;
529
530 return(p);
531 }
532
533 static struct termp *
534 pspdf_alloc(const struct mchars *mchars, const struct manoutput *outopts)
535 {
536 struct termp *p;
537 unsigned int pagex, pagey;
538 size_t marginx, marginy, lineheight;
539 const char *pp;
540
541 p = mandoc_calloc(1, sizeof(struct termp));
542 p->symtab = mchars;
543 p->enc = TERMENC_ASCII;
544 p->fontq = mandoc_reallocarray(NULL,
545 (p->fontsz = 8), sizeof(enum termfont));
546 p->fontq[0] = p->fontl = TERMFONT_NONE;
547 p->ps = mandoc_calloc(1, sizeof(struct termp_ps));
548
549 p->advance = ps_advance;
550 p->begin = ps_begin;
551 p->end = ps_end;
552 p->endline = ps_endline;
553 p->hspan = ps_hspan;
554 p->letter = ps_letter;
555 p->setwidth = ps_setwidth;
556 p->width = ps_width;
557
558 /* Default to US letter (millimetres). */
559
560 pagex = 216;
561 pagey = 279;
562
563 /*
564 * The ISO-269 paper sizes can be calculated automatically, but
565 * it would require bringing in -lm for pow() and I'd rather not
566 * do that. So just do it the easy way for now. Since this
567 * only happens once, I'm not terribly concerned.
568 */
569
570 pp = outopts->paper;
571 if (pp && strcasecmp(pp, "letter")) {
572 if (0 == strcasecmp(pp, "a3")) {
573 pagex = 297;
574 pagey = 420;
575 } else if (0 == strcasecmp(pp, "a4")) {
576 pagex = 210;
577 pagey = 297;
578 } else if (0 == strcasecmp(pp, "a5")) {
579 pagex = 148;
580 pagey = 210;
581 } else if (0 == strcasecmp(pp, "legal")) {
582 pagex = 216;
583 pagey = 356;
584 } else if (2 != sscanf(pp, "%ux%u", &pagex, &pagey))
585 fprintf(stderr, "%s: Unknown paper\n", pp);
586 }
587
588 /*
589 * This MUST be defined before any PNT2AFM or AFM2PNT
590 * calculations occur.
591 */
592
593 p->ps->scale = 11;
594
595 /* Remember millimetres -> AFM units. */
596
597 pagex = PNT2AFM(p, ((double)pagex * 2.834));
598 pagey = PNT2AFM(p, ((double)pagey * 2.834));
599
600 /* Margins are 1/9 the page x and y. */
601
602 marginx = (size_t)((double)pagex / 9.0);
603 marginy = (size_t)((double)pagey / 9.0);
604
605 /* Line-height is 1.4em. */
606
607 lineheight = PNT2AFM(p, ((double)p->ps->scale * 1.4));
608
609 p->ps->width = p->ps->lastwidth = (size_t)pagex;
610 p->ps->height = (size_t)pagey;
611 p->ps->header = pagey - (marginy / 2) - (lineheight / 2);
612 p->ps->top = pagey - marginy;
613 p->ps->footer = (marginy / 2) - (lineheight / 2);
614 p->ps->bottom = marginy;
615 p->ps->left = marginx;
616 p->ps->lineheight = lineheight;
617
618 p->defrmargin = pagex - (marginx * 2);
619 return(p);
620 }
621
622 static void
623 ps_setwidth(struct termp *p, int iop, int width)
624 {
625 size_t lastwidth;
626
627 lastwidth = p->ps->width;
628 if (iop > 0)
629 p->ps->width += width;
630 else if (iop == 0)
631 p->ps->width = width ? (size_t)width : p->ps->lastwidth;
632 else if (p->ps->width > (size_t)width)
633 p->ps->width -= width;
634 else
635 p->ps->width = 0;
636 p->ps->lastwidth = lastwidth;
637 }
638
639 void
640 pspdf_free(void *arg)
641 {
642 struct termp *p;
643
644 p = (struct termp *)arg;
645
646 if (p->ps->psmarg)
647 free(p->ps->psmarg);
648 if (p->ps->pdfobjs)
649 free(p->ps->pdfobjs);
650
651 free(p->ps);
652 term_free(p);
653 }
654
655 static void
656 ps_printf(struct termp *p, const char *fmt, ...)
657 {
658 va_list ap;
659 int pos, len;
660
661 va_start(ap, fmt);
662
663 /*
664 * If we're running in regular mode, then pipe directly into
665 * vprintf(). If we're processing margins, then push the data
666 * into our growable margin buffer.
667 */
668
669 if ( ! (PS_MARGINS & p->ps->flags)) {
670 len = vprintf(fmt, ap);
671 va_end(ap);
672 p->ps->pdfbytes += len < 0 ? 0 : (size_t)len;
673 return;
674 }
675
676 /*
677 * XXX: I assume that the in-margin print won't exceed
678 * PS_BUFSLOP (128 bytes), which is reasonable but still an
679 * assumption that will cause pukeage if it's not the case.
680 */
681
682 ps_growbuf(p, PS_BUFSLOP);
683
684 pos = (int)p->ps->psmargcur;
685 vsnprintf(&p->ps->psmarg[pos], PS_BUFSLOP, fmt, ap);
686
687 va_end(ap);
688
689 p->ps->psmargcur = strlen(p->ps->psmarg);
690 }
691
692 static void
693 ps_putchar(struct termp *p, char c)
694 {
695 int pos;
696
697 /* See ps_printf(). */
698
699 if ( ! (PS_MARGINS & p->ps->flags)) {
700 putchar(c);
701 p->ps->pdfbytes++;
702 return;
703 }
704
705 ps_growbuf(p, 2);
706
707 pos = (int)p->ps->psmargcur++;
708 p->ps->psmarg[pos++] = c;
709 p->ps->psmarg[pos] = '\0';
710 }
711
712 static void
713 pdf_obj(struct termp *p, size_t obj)
714 {
715
716 assert(obj > 0);
717
718 if ((obj - 1) >= p->ps->pdfobjsz) {
719 p->ps->pdfobjsz = obj + 128;
720 p->ps->pdfobjs = mandoc_reallocarray(p->ps->pdfobjs,
721 p->ps->pdfobjsz, sizeof(size_t));
722 }
723
724 p->ps->pdfobjs[(int)obj - 1] = p->ps->pdfbytes;
725 ps_printf(p, "%zu 0 obj\n", obj);
726 }
727
728 static void
729 ps_closepage(struct termp *p)
730 {
731 int i;
732 size_t len, base;
733
734 /*
735 * Close out a page that we've already flushed to output. In
736 * PostScript, we simply note that the page must be showed. In
737 * PDF, we must now create the Length, Resource, and Page node
738 * for the page contents.
739 */
740
741 assert(p->ps->psmarg && p->ps->psmarg[0]);
742 ps_printf(p, "%s", p->ps->psmarg);
743
744 if (TERMTYPE_PS != p->type) {
745 ps_printf(p, "ET\n");
746
747 len = p->ps->pdfbytes - p->ps->pdflastpg;
748 base = p->ps->pages * 4 + p->ps->pdfbody;
749
750 ps_printf(p, "endstream\nendobj\n");
751
752 /* Length of content. */
753 pdf_obj(p, base + 1);
754 ps_printf(p, "%zu\nendobj\n", len);
755
756 /* Resource for content. */
757 pdf_obj(p, base + 2);
758 ps_printf(p, "<<\n/ProcSet [/PDF /Text]\n");
759 ps_printf(p, "/Font <<\n");
760 for (i = 0; i < (int)TERMFONT__MAX; i++)
761 ps_printf(p, "/F%d %d 0 R\n", i, 3 + i);
762 ps_printf(p, ">>\n>>\n");
763
764 /* Page node. */
765 pdf_obj(p, base + 3);
766 ps_printf(p, "<<\n");
767 ps_printf(p, "/Type /Page\n");
768 ps_printf(p, "/Parent 2 0 R\n");
769 ps_printf(p, "/Resources %zu 0 R\n", base + 2);
770 ps_printf(p, "/Contents %zu 0 R\n", base);
771 ps_printf(p, ">>\nendobj\n");
772 } else
773 ps_printf(p, "showpage\n");
774
775 p->ps->pages++;
776 p->ps->psrow = p->ps->top;
777 assert( ! (PS_NEWPAGE & p->ps->flags));
778 p->ps->flags |= PS_NEWPAGE;
779 }
780
781 static void
782 ps_end(struct termp *p)
783 {
784 size_t i, xref, base;
785
786 /*
787 * At the end of the file, do one last showpage. This is the
788 * same behaviour as groff(1) and works for multiple pages as
789 * well as just one.
790 */
791
792 if ( ! (PS_NEWPAGE & p->ps->flags)) {
793 assert(0 == p->ps->flags);
794 assert('\0' == p->ps->last);
795 ps_closepage(p);
796 }
797
798 if (TERMTYPE_PS == p->type) {
799 ps_printf(p, "%%%%Trailer\n");
800 ps_printf(p, "%%%%Pages: %zu\n", p->ps->pages);
801 ps_printf(p, "%%%%EOF\n");
802 return;
803 }
804
805 pdf_obj(p, 2);
806 ps_printf(p, "<<\n/Type /Pages\n");
807 ps_printf(p, "/MediaBox [0 0 %zu %zu]\n",
808 (size_t)AFM2PNT(p, p->ps->width),
809 (size_t)AFM2PNT(p, p->ps->height));
810
811 ps_printf(p, "/Count %zu\n", p->ps->pages);
812 ps_printf(p, "/Kids [");
813
814 for (i = 0; i < p->ps->pages; i++)
815 ps_printf(p, " %zu 0 R", i * 4 + p->ps->pdfbody + 3);
816
817 base = (p->ps->pages - 1) * 4 + p->ps->pdfbody + 4;
818
819 ps_printf(p, "]\n>>\nendobj\n");
820 pdf_obj(p, base);
821 ps_printf(p, "<<\n");
822 ps_printf(p, "/Type /Catalog\n");
823 ps_printf(p, "/Pages 2 0 R\n");
824 ps_printf(p, ">>\n");
825 xref = p->ps->pdfbytes;
826 ps_printf(p, "xref\n");
827 ps_printf(p, "0 %zu\n", base + 1);
828 ps_printf(p, "0000000000 65535 f \n");
829
830 for (i = 0; i < base; i++)
831 ps_printf(p, "%.10zu 00000 n \n",
832 p->ps->pdfobjs[(int)i]);
833
834 ps_printf(p, "trailer\n");
835 ps_printf(p, "<<\n");
836 ps_printf(p, "/Size %zu\n", base + 1);
837 ps_printf(p, "/Root %zu 0 R\n", base);
838 ps_printf(p, "/Info 1 0 R\n");
839 ps_printf(p, ">>\n");
840 ps_printf(p, "startxref\n");
841 ps_printf(p, "%zu\n", xref);
842 ps_printf(p, "%%%%EOF\n");
843 }
844
845 static void
846 ps_begin(struct termp *p)
847 {
848 int i;
849
850 /*
851 * Print margins into margin buffer. Nothing gets output to the
852 * screen yet, so we don't need to initialise the primary state.
853 */
854
855 if (p->ps->psmarg) {
856 assert(p->ps->psmargsz);
857 p->ps->psmarg[0] = '\0';
858 }
859
860 /*p->ps->pdfbytes = 0;*/
861 p->ps->psmargcur = 0;
862 p->ps->flags = PS_MARGINS;
863 p->ps->pscol = p->ps->left;
864 p->ps->psrow = p->ps->header;
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 ps_printf(p, "%%!PS-Adobe-3.0\n");
890 ps_printf(p, "%%%%DocumentData: Clean7Bit\n");
891 ps_printf(p, "%%%%Orientation: Portrait\n");
892 ps_printf(p, "%%%%Pages: (atend)\n");
893 ps_printf(p, "%%%%PageOrder: Ascend\n");
894 ps_printf(p, "%%%%DocumentMedia: "
895 "Default %zu %zu 0 () ()\n",
896 (size_t)AFM2PNT(p, p->ps->width),
897 (size_t)AFM2PNT(p, p->ps->height));
898 ps_printf(p, "%%%%DocumentNeededResources: font");
899
900 for (i = 0; i < (int)TERMFONT__MAX; i++)
901 ps_printf(p, " %s", fonts[i].name);
902
903 ps_printf(p, "\n%%%%EndComments\n");
904 } else {
905 ps_printf(p, "%%PDF-1.1\n");
906 pdf_obj(p, 1);
907 ps_printf(p, "<<\n");
908 ps_printf(p, ">>\n");
909 ps_printf(p, "endobj\n");
910
911 for (i = 0; i < (int)TERMFONT__MAX; i++) {
912 pdf_obj(p, (size_t)i + 3);
913 ps_printf(p, "<<\n");
914 ps_printf(p, "/Type /Font\n");
915 ps_printf(p, "/Subtype /Type1\n");
916 ps_printf(p, "/Name /F%d\n", i);
917 ps_printf(p, "/BaseFont /%s\n", fonts[i].name);
918 ps_printf(p, ">>\n");
919 }
920 }
921
922 p->ps->pdfbody = (size_t)TERMFONT__MAX + 3;
923 p->ps->pscol = p->ps->left;
924 p->ps->psrow = p->ps->top;
925 p->ps->flags |= PS_NEWPAGE;
926 ps_setfont(p, TERMFONT_NONE);
927 }
928
929 static void
930 ps_pletter(struct termp *p, int c)
931 {
932 int f;
933
934 /*
935 * If we haven't opened a page context, then output that we're
936 * in a new page and make sure the font is correctly set.
937 */
938
939 if (PS_NEWPAGE & p->ps->flags) {
940 if (TERMTYPE_PS == p->type) {
941 ps_printf(p, "%%%%Page: %zu %zu\n",
942 p->ps->pages + 1, p->ps->pages + 1);
943 ps_printf(p, "/%s %zu selectfont\n",
944 fonts[(int)p->ps->lastf].name,
945 p->ps->scale);
946 } else {
947 pdf_obj(p, p->ps->pdfbody +
948 p->ps->pages * 4);
949 ps_printf(p, "<<\n");
950 ps_printf(p, "/Length %zu 0 R\n",
951 p->ps->pdfbody + 1 + p->ps->pages * 4);
952 ps_printf(p, ">>\nstream\n");
953 }
954 p->ps->pdflastpg = p->ps->pdfbytes;
955 p->ps->flags &= ~PS_NEWPAGE;
956 }
957
958 /*
959 * If we're not in a PostScript "word" context, then open one
960 * now at the current cursor.
961 */
962
963 if ( ! (PS_INLINE & p->ps->flags)) {
964 if (TERMTYPE_PS != p->type) {
965 ps_printf(p, "BT\n/F%d %zu Tf\n",
966 (int)p->ps->lastf, p->ps->scale);
967 ps_printf(p, "%.3f %.3f Td\n(",
968 AFM2PNT(p, p->ps->pscol),
969 AFM2PNT(p, p->ps->psrow));
970 } else
971 ps_printf(p, "%.3f %.3f moveto\n(",
972 AFM2PNT(p, p->ps->pscol),
973 AFM2PNT(p, p->ps->psrow));
974 p->ps->flags |= PS_INLINE;
975 }
976
977 assert( ! (PS_NEWPAGE & p->ps->flags));
978
979 /*
980 * We need to escape these characters as per the PostScript
981 * specification. We would also escape non-graphable characters
982 * (like tabs), but none of them would get to this point and
983 * it's superfluous to abort() on them.
984 */
985
986 switch (c) {
987 case '(':
988 /* FALLTHROUGH */
989 case ')':
990 /* FALLTHROUGH */
991 case '\\':
992 ps_putchar(p, '\\');
993 break;
994 default:
995 break;
996 }
997
998 /* Write the character and adjust where we are on the page. */
999
1000 f = (int)p->ps->lastf;
1001
1002 if (c <= 32 || c - 32 >= MAXCHAR)
1003 c = 32;
1004
1005 ps_putchar(p, (char)c);
1006 c -= 32;
1007 p->ps->pscol += (size_t)fonts[f].gly[c].wx;
1008 }
1009
1010 static void
1011 ps_pclose(struct termp *p)
1012 {
1013
1014 /*
1015 * Spit out that we're exiting a word context (this is a
1016 * "partial close" because we don't check the last-char buffer
1017 * or anything).
1018 */
1019
1020 if ( ! (PS_INLINE & p->ps->flags))
1021 return;
1022
1023 if (TERMTYPE_PS != p->type) {
1024 ps_printf(p, ") Tj\nET\n");
1025 } else
1026 ps_printf(p, ") show\n");
1027
1028 p->ps->flags &= ~PS_INLINE;
1029 }
1030
1031 static void
1032 ps_fclose(struct termp *p)
1033 {
1034
1035 /*
1036 * Strong closure: if we have a last-char, spit it out after
1037 * checking that we're in the right font mode. This will of
1038 * course open a new scope, if applicable.
1039 *
1040 * Following this, close out any scope that's open.
1041 */
1042
1043 if (p->ps->last != '\0') {
1044 assert( ! (p->ps->flags & PS_BACKSP));
1045 if (p->ps->nextf != p->ps->lastf) {
1046 ps_pclose(p);
1047 ps_setfont(p, p->ps->nextf);
1048 }
1049 p->ps->nextf = TERMFONT_NONE;
1050 ps_pletter(p, p->ps->last);
1051 p->ps->last = '\0';
1052 }
1053
1054 if ( ! (PS_INLINE & p->ps->flags))
1055 return;
1056
1057 ps_pclose(p);
1058 }
1059
1060 static void
1061 ps_letter(struct termp *p, int arg)
1062 {
1063 size_t savecol, wx;
1064 char c;
1065
1066 c = arg >= 128 || arg <= 0 ? '?' : arg;
1067
1068 /*
1069 * When receiving a backspace, merely flag it.
1070 * We don't know yet whether it is
1071 * a font instruction or an overstrike.
1072 */
1073
1074 if (c == '\b') {
1075 assert(p->ps->last != '\0');
1076 assert( ! (p->ps->flags & PS_BACKSP));
1077 p->ps->flags |= PS_BACKSP;
1078 return;
1079 }
1080
1081 /*
1082 * Decode font instructions.
1083 */
1084
1085 if (p->ps->flags & PS_BACKSP) {
1086 if (p->ps->last == '_') {
1087 switch (p->ps->nextf) {
1088 case TERMFONT_BI:
1089 break;
1090 case TERMFONT_BOLD:
1091 p->ps->nextf = TERMFONT_BI;
1092 break;
1093 default:
1094 p->ps->nextf = TERMFONT_UNDER;
1095 }
1096 p->ps->last = c;
1097 p->ps->flags &= ~PS_BACKSP;
1098 return;
1099 }
1100 if (p->ps->last == c) {
1101 switch (p->ps->nextf) {
1102 case TERMFONT_BI:
1103 break;
1104 case TERMFONT_UNDER:
1105 p->ps->nextf = TERMFONT_BI;
1106 break;
1107 default:
1108 p->ps->nextf = TERMFONT_BOLD;
1109 }
1110 p->ps->flags &= ~PS_BACKSP;
1111 return;
1112 }
1113
1114 /*
1115 * This is not a font instruction, but rather
1116 * the next character. Prepare for overstrike.
1117 */
1118
1119 savecol = p->ps->pscol;
1120 } else
1121 savecol = SIZE_MAX;
1122
1123 /*
1124 * We found the next character, so the font instructions
1125 * for the previous one are complete.
1126 * Use them and print it.
1127 */
1128
1129 if (p->ps->last != '\0') {
1130 if (p->ps->nextf != p->ps->lastf) {
1131 ps_pclose(p);
1132 ps_setfont(p, p->ps->nextf);
1133 }
1134 p->ps->nextf = TERMFONT_NONE;
1135
1136 /*
1137 * For an overstrike, if a previous character
1138 * was wider, advance to center the new one.
1139 */
1140
1141 if (p->ps->pscolnext) {
1142 wx = fonts[p->ps->lastf].gly[(int)p->ps->last-32].wx;
1143 if (p->ps->pscol + wx < p->ps->pscolnext)
1144 p->ps->pscol = (p->ps->pscol +
1145 p->ps->pscolnext - wx) / 2;
1146 }
1147
1148 ps_pletter(p, p->ps->last);
1149
1150 /*
1151 * For an overstrike, if a previous character
1152 * was wider, advance to the end of the old one.
1153 */
1154
1155 if (p->ps->pscol < p->ps->pscolnext) {
1156 ps_pclose(p);
1157 p->ps->pscol = p->ps->pscolnext;
1158 }
1159 }
1160
1161 /*
1162 * Do not print the current character yet because font
1163 * instructions might follow; only remember it.
1164 * For the first character, nothing else is done.
1165 * The final character will get printed from ps_fclose().
1166 */
1167
1168 p->ps->last = c;
1169
1170 /*
1171 * For an overstrike, back up to the previous position.
1172 * If the previous character is wider than any it overstrikes,
1173 * remember the current position, because it might also be
1174 * wider than all that will overstrike it.
1175 */
1176
1177 if (savecol != SIZE_MAX) {
1178 if (p->ps->pscolnext < p->ps->pscol)
1179 p->ps->pscolnext = p->ps->pscol;
1180 ps_pclose(p);
1181 p->ps->pscol = savecol;
1182 p->ps->flags &= ~PS_BACKSP;
1183 } else
1184 p->ps->pscolnext = 0;
1185 }
1186
1187 static void
1188 ps_advance(struct termp *p, size_t len)
1189 {
1190
1191 /*
1192 * Advance some spaces. This can probably be made smarter,
1193 * i.e., to have multiple space-separated words in the same
1194 * scope, but this is easier: just close out the current scope
1195 * and readjust our column settings.
1196 */
1197
1198 ps_fclose(p);
1199 p->ps->pscol += len;
1200 }
1201
1202 static void
1203 ps_endline(struct termp *p)
1204 {
1205
1206 /* Close out any scopes we have open: we're at eoln. */
1207
1208 ps_fclose(p);
1209
1210 /*
1211 * If we're in the margin, don't try to recalculate our current
1212 * row. XXX: if the column tries to be fancy with multiple
1213 * lines, we'll do nasty stuff.
1214 */
1215
1216 if (PS_MARGINS & p->ps->flags)
1217 return;
1218
1219 /* Left-justify. */
1220
1221 p->ps->pscol = p->ps->left;
1222
1223 /* If we haven't printed anything, return. */
1224
1225 if (PS_NEWPAGE & p->ps->flags)
1226 return;
1227
1228 /*
1229 * Put us down a line. If we're at the page bottom, spit out a
1230 * showpage and restart our row.
1231 */
1232
1233 if (p->ps->psrow >= p->ps->lineheight + p->ps->bottom) {
1234 p->ps->psrow -= p->ps->lineheight;
1235 return;
1236 }
1237
1238 ps_closepage(p);
1239 }
1240
1241 static void
1242 ps_setfont(struct termp *p, enum termfont f)
1243 {
1244
1245 assert(f < TERMFONT__MAX);
1246 p->ps->lastf = f;
1247
1248 /*
1249 * If we're still at the top of the page, let the font-setting
1250 * be delayed until we actually have stuff to print.
1251 */
1252
1253 if (PS_NEWPAGE & p->ps->flags)
1254 return;
1255
1256 if (TERMTYPE_PS == p->type)
1257 ps_printf(p, "/%s %zu selectfont\n",
1258 fonts[(int)f].name, p->ps->scale);
1259 else
1260 ps_printf(p, "/F%d %zu Tf\n",
1261 (int)f, p->ps->scale);
1262 }
1263
1264 static size_t
1265 ps_width(const struct termp *p, int c)
1266 {
1267
1268 if (c <= 32 || c - 32 >= MAXCHAR)
1269 c = 0;
1270 else
1271 c -= 32;
1272
1273 return((size_t)fonts[(int)TERMFONT_NONE].gly[c].wx);
1274 }
1275
1276 static int
1277 ps_hspan(const struct termp *p, const struct roffsu *su)
1278 {
1279 double r;
1280
1281 /*
1282 * All of these measurements are derived by converting from the
1283 * native measurement to AFM units.
1284 */
1285 switch (su->unit) {
1286 case SCALE_BU:
1287 /*
1288 * Traditionally, the default unit is fixed to the
1289 * output media. So this would refer to the point. In
1290 * mandoc(1), however, we stick to the default terminal
1291 * scaling unit so that output is the same regardless
1292 * the media.
1293 */
1294 r = PNT2AFM(p, su->scale * 72.0 / 240.0);
1295 break;
1296 case SCALE_CM:
1297 r = PNT2AFM(p, su->scale * 72.0 / 2.54);
1298 break;
1299 case SCALE_EM:
1300 r = su->scale *
1301 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx;
1302 break;
1303 case SCALE_EN:
1304 r = su->scale *
1305 fonts[(int)TERMFONT_NONE].gly[110 - 32].wx;
1306 break;
1307 case SCALE_IN:
1308 r = PNT2AFM(p, su->scale * 72.0);
1309 break;
1310 case SCALE_MM:
1311 r = su->scale *
1312 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx / 100.0;
1313 break;
1314 case SCALE_PC:
1315 r = PNT2AFM(p, su->scale * 12.0);
1316 break;
1317 case SCALE_PT:
1318 r = PNT2AFM(p, su->scale * 1.0);
1319 break;
1320 case SCALE_VS:
1321 r = su->scale * p->ps->lineheight;
1322 break;
1323 default:
1324 r = su->scale;
1325 break;
1326 }
1327
1328 return(r * 24.0);
1329 }
1330
1331 static void
1332 ps_growbuf(struct termp *p, size_t sz)
1333 {
1334 if (p->ps->psmargcur + sz <= p->ps->psmargsz)
1335 return;
1336
1337 if (sz < PS_BUFSLOP)
1338 sz = PS_BUFSLOP;
1339
1340 p->ps->psmargsz += sz;
1341 p->ps->psmarg = mandoc_realloc(p->ps->psmarg, p->ps->psmargsz);
1342 }
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