1 /* $Id: term_ps.c,v 1.85 2017/06/07 17:38:26 schwarze Exp $ */
2 /*
3 * Copyright (c) 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
4 * Copyright (c) 2014, 2015, 2016, 2017 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 #if HAVE_ERR
24 #include <err.h>
25 #endif
26 #include <stdarg.h>
27 #include <stdint.h>
28 #include <stdio.h>
29 #include <stdlib.h>
30 #include <string.h>
31 #include <unistd.h>
32
33 #include "mandoc_aux.h"
34 #include "out.h"
35 #include "term.h"
36 #include "manconf.h"
37 #include "main.h"
38
39 /* These work the buffer used by the header and footer. */
40 #define PS_BUFSLOP 128
41
42 /* Convert PostScript point "x" to an AFM unit. */
43 #define PNT2AFM(p, x) \
44 (size_t)((double)(x) * (1000.0 / (double)(p)->ps->scale))
45
46 /* Convert an AFM unit "x" to a PostScript points */
47 #define AFM2PNT(p, x) \
48 ((double)(x) / (1000.0 / (double)(p)->ps->scale))
49
50 struct glyph {
51 unsigned short wx; /* WX in AFM */
52 };
53
54 struct font {
55 const char *name; /* FontName in AFM */
56 #define MAXCHAR 95 /* total characters we can handle */
57 struct glyph gly[MAXCHAR]; /* glyph metrics */
58 };
59
60 struct termp_ps {
61 int flags;
62 #define PS_INLINE (1 << 0) /* we're in a word */
63 #define PS_MARGINS (1 << 1) /* we're in the margins */
64 #define PS_NEWPAGE (1 << 2) /* new page, no words yet */
65 #define PS_BACKSP (1 << 3) /* last character was backspace */
66 size_t pscol; /* visible column (AFM units) */
67 size_t pscolnext; /* used for overstrike */
68 size_t psrow; /* visible row (AFM units) */
69 char *psmarg; /* margin buf */
70 size_t psmargsz; /* margin buf size */
71 size_t psmargcur; /* cur index in margin buf */
72 char last; /* last non-backspace seen */
73 enum termfont lastf; /* last set font */
74 enum termfont nextf; /* building next font here */
75 size_t scale; /* font scaling factor */
76 size_t pages; /* number of pages shown */
77 size_t lineheight; /* line height (AFM units) */
78 size_t top; /* body top (AFM units) */
79 size_t bottom; /* body bottom (AFM units) */
80 size_t height; /* page height (AFM units */
81 size_t width; /* page width (AFM units) */
82 size_t lastwidth; /* page width before last ll */
83 size_t left; /* body left (AFM units) */
84 size_t header; /* header pos (AFM units) */
85 size_t footer; /* footer pos (AFM units) */
86 size_t pdfbytes; /* current output byte */
87 size_t pdflastpg; /* byte of last page mark */
88 size_t pdfbody; /* start of body object */
89 size_t *pdfobjs; /* table of object offsets */
90 size_t pdfobjsz; /* size of pdfobjs */
91 };
92
93 static int ps_hspan(const struct termp *,
94 const struct roffsu *);
95 static size_t ps_width(const struct termp *, int);
96 static void ps_advance(struct termp *, size_t);
97 static void ps_begin(struct termp *);
98 static void ps_closepage(struct termp *);
99 static void ps_end(struct termp *);
100 static void ps_endline(struct termp *);
101 static void ps_growbuf(struct termp *, size_t);
102 static void ps_letter(struct termp *, int);
103 static void ps_pclose(struct termp *);
104 static void ps_plast(struct termp *);
105 static void ps_pletter(struct termp *, int);
106 static void ps_printf(struct termp *, const char *, ...)
107 __attribute__((__format__ (__printf__, 2, 3)));
108 static void ps_putchar(struct termp *, char);
109 static void ps_setfont(struct termp *, enum termfont);
110 static void ps_setwidth(struct termp *, int, int);
111 static struct termp *pspdf_alloc(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 manoutput *outopts)
513 {
514 struct termp *p;
515
516 if (NULL != (p = pspdf_alloc(outopts)))
517 p->type = TERMTYPE_PDF;
518
519 return p;
520 }
521
522 void *
523 ps_alloc(const struct manoutput *outopts)
524 {
525 struct termp *p;
526
527 if (NULL != (p = pspdf_alloc(outopts)))
528 p->type = TERMTYPE_PS;
529
530 return p;
531 }
532
533 static struct termp *
534 pspdf_alloc(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(*p));
542 p->tcol = p->tcols = mandoc_calloc(1, sizeof(*p->tcol));
543 p->maxtcol = 1;
544
545 p->enc = TERMENC_ASCII;
546 p->fontq = mandoc_reallocarray(NULL,
547 (p->fontsz = 8), sizeof(*p->fontq));
548 p->fontq[0] = p->fontl = TERMFONT_NONE;
549 p->ps = mandoc_calloc(1, sizeof(*p->ps));
550
551 p->advance = ps_advance;
552 p->begin = ps_begin;
553 p->end = ps_end;
554 p->endline = ps_endline;
555 p->hspan = ps_hspan;
556 p->letter = ps_letter;
557 p->setwidth = ps_setwidth;
558 p->width = ps_width;
559
560 /* Default to US letter (millimetres). */
561
562 pagex = 216;
563 pagey = 279;
564
565 /*
566 * The ISO-269 paper sizes can be calculated automatically, but
567 * it would require bringing in -lm for pow() and I'd rather not
568 * do that. So just do it the easy way for now. Since this
569 * only happens once, I'm not terribly concerned.
570 */
571
572 pp = outopts->paper;
573 if (pp && strcasecmp(pp, "letter")) {
574 if (0 == strcasecmp(pp, "a3")) {
575 pagex = 297;
576 pagey = 420;
577 } else if (0 == strcasecmp(pp, "a4")) {
578 pagex = 210;
579 pagey = 297;
580 } else if (0 == strcasecmp(pp, "a5")) {
581 pagex = 148;
582 pagey = 210;
583 } else if (0 == strcasecmp(pp, "legal")) {
584 pagex = 216;
585 pagey = 356;
586 } else if (2 != sscanf(pp, "%ux%u", &pagex, &pagey))
587 warnx("%s: Unknown paper", pp);
588 }
589
590 /*
591 * This MUST be defined before any PNT2AFM or AFM2PNT
592 * calculations occur.
593 */
594
595 p->ps->scale = 11;
596
597 /* Remember millimetres -> AFM units. */
598
599 pagex = PNT2AFM(p, ((double)pagex * 2.834));
600 pagey = PNT2AFM(p, ((double)pagey * 2.834));
601
602 /* Margins are 1/9 the page x and y. */
603
604 marginx = (size_t)((double)pagex / 9.0);
605 marginy = (size_t)((double)pagey / 9.0);
606
607 /* Line-height is 1.4em. */
608
609 lineheight = PNT2AFM(p, ((double)p->ps->scale * 1.4));
610
611 p->ps->width = p->ps->lastwidth = (size_t)pagex;
612 p->ps->height = (size_t)pagey;
613 p->ps->header = pagey - (marginy / 2) - (lineheight / 2);
614 p->ps->top = pagey - marginy;
615 p->ps->footer = (marginy / 2) - (lineheight / 2);
616 p->ps->bottom = marginy;
617 p->ps->left = marginx;
618 p->ps->lineheight = lineheight;
619
620 p->defrmargin = pagex - (marginx * 2);
621 return p;
622 }
623
624 static void
625 ps_setwidth(struct termp *p, int iop, int width)
626 {
627 size_t lastwidth;
628
629 lastwidth = p->ps->width;
630 if (iop > 0)
631 p->ps->width += width;
632 else if (iop == 0)
633 p->ps->width = width ? (size_t)width : p->ps->lastwidth;
634 else if (p->ps->width > (size_t)width)
635 p->ps->width -= width;
636 else
637 p->ps->width = 0;
638 p->ps->lastwidth = lastwidth;
639 }
640
641 void
642 pspdf_free(void *arg)
643 {
644 struct termp *p;
645
646 p = (struct termp *)arg;
647
648 free(p->ps->psmarg);
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 ps_plast(p);
787 ps_pclose(p);
788
789 /*
790 * At the end of the file, do one last showpage. This is the
791 * same behaviour as groff(1) and works for multiple pages as
792 * well as just one.
793 */
794
795 if ( ! (PS_NEWPAGE & p->ps->flags)) {
796 assert(0 == p->ps->flags);
797 assert('\0' == p->ps->last);
798 ps_closepage(p);
799 }
800
801 if (TERMTYPE_PS == p->type) {
802 ps_printf(p, "%%%%Trailer\n");
803 ps_printf(p, "%%%%Pages: %zu\n", p->ps->pages);
804 ps_printf(p, "%%%%EOF\n");
805 return;
806 }
807
808 pdf_obj(p, 2);
809 ps_printf(p, "<<\n/Type /Pages\n");
810 ps_printf(p, "/MediaBox [0 0 %zu %zu]\n",
811 (size_t)AFM2PNT(p, p->ps->width),
812 (size_t)AFM2PNT(p, p->ps->height));
813
814 ps_printf(p, "/Count %zu\n", p->ps->pages);
815 ps_printf(p, "/Kids [");
816
817 for (i = 0; i < p->ps->pages; i++)
818 ps_printf(p, " %zu 0 R", i * 4 + p->ps->pdfbody + 3);
819
820 base = (p->ps->pages - 1) * 4 + p->ps->pdfbody + 4;
821
822 ps_printf(p, "]\n>>\nendobj\n");
823 pdf_obj(p, base);
824 ps_printf(p, "<<\n");
825 ps_printf(p, "/Type /Catalog\n");
826 ps_printf(p, "/Pages 2 0 R\n");
827 ps_printf(p, ">>\n");
828 xref = p->ps->pdfbytes;
829 ps_printf(p, "xref\n");
830 ps_printf(p, "0 %zu\n", base + 1);
831 ps_printf(p, "0000000000 65535 f \n");
832
833 for (i = 0; i < base; i++)
834 ps_printf(p, "%.10zu 00000 n \n",
835 p->ps->pdfobjs[(int)i]);
836
837 ps_printf(p, "trailer\n");
838 ps_printf(p, "<<\n");
839 ps_printf(p, "/Size %zu\n", base + 1);
840 ps_printf(p, "/Root %zu 0 R\n", base);
841 ps_printf(p, "/Info 1 0 R\n");
842 ps_printf(p, ">>\n");
843 ps_printf(p, "startxref\n");
844 ps_printf(p, "%zu\n", xref);
845 ps_printf(p, "%%%%EOF\n");
846 }
847
848 static void
849 ps_begin(struct termp *p)
850 {
851 int i;
852
853 /*
854 * Print margins into margin buffer. Nothing gets output to the
855 * screen yet, so we don't need to initialise the primary state.
856 */
857
858 if (p->ps->psmarg) {
859 assert(p->ps->psmargsz);
860 p->ps->psmarg[0] = '\0';
861 }
862
863 /*p->ps->pdfbytes = 0;*/
864 p->ps->psmargcur = 0;
865 p->ps->flags = PS_MARGINS;
866 p->ps->pscol = p->ps->left;
867 p->ps->psrow = p->ps->header;
868
869 ps_setfont(p, TERMFONT_NONE);
870
871 (*p->headf)(p, p->argf);
872 (*p->endline)(p);
873
874 p->ps->pscol = p->ps->left;
875 p->ps->psrow = p->ps->footer;
876
877 (*p->footf)(p, p->argf);
878 (*p->endline)(p);
879
880 p->ps->flags &= ~PS_MARGINS;
881
882 assert(0 == p->ps->flags);
883 assert(p->ps->psmarg);
884 assert('\0' != p->ps->psmarg[0]);
885
886 /*
887 * Print header and initialise page state. Following this,
888 * stuff gets printed to the screen, so make sure we're sane.
889 */
890
891 if (TERMTYPE_PS == p->type) {
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: "
898 "Default %zu %zu 0 () ()\n",
899 (size_t)AFM2PNT(p, p->ps->width),
900 (size_t)AFM2PNT(p, p->ps->height));
901 ps_printf(p, "%%%%DocumentNeededResources: font");
902
903 for (i = 0; i < (int)TERMFONT__MAX; i++)
904 ps_printf(p, " %s", fonts[i].name);
905
906 ps_printf(p, "\n%%%%EndComments\n");
907 } else {
908 ps_printf(p, "%%PDF-1.1\n");
909 pdf_obj(p, 1);
910 ps_printf(p, "<<\n");
911 ps_printf(p, ">>\n");
912 ps_printf(p, "endobj\n");
913
914 for (i = 0; i < (int)TERMFONT__MAX; i++) {
915 pdf_obj(p, (size_t)i + 3);
916 ps_printf(p, "<<\n");
917 ps_printf(p, "/Type /Font\n");
918 ps_printf(p, "/Subtype /Type1\n");
919 ps_printf(p, "/Name /F%d\n", i);
920 ps_printf(p, "/BaseFont /%s\n", fonts[i].name);
921 ps_printf(p, ">>\n");
922 }
923 }
924
925 p->ps->pdfbody = (size_t)TERMFONT__MAX + 3;
926 p->ps->pscol = p->ps->left;
927 p->ps->psrow = p->ps->top;
928 p->ps->flags |= PS_NEWPAGE;
929 ps_setfont(p, TERMFONT_NONE);
930 }
931
932 static void
933 ps_pletter(struct termp *p, int c)
934 {
935 int f;
936
937 /*
938 * If we haven't opened a page context, then output that we're
939 * in a new page and make sure the font is correctly set.
940 */
941
942 if (PS_NEWPAGE & p->ps->flags) {
943 if (TERMTYPE_PS == p->type) {
944 ps_printf(p, "%%%%Page: %zu %zu\n",
945 p->ps->pages + 1, p->ps->pages + 1);
946 ps_printf(p, "/%s %zu selectfont\n",
947 fonts[(int)p->ps->lastf].name,
948 p->ps->scale);
949 } else {
950 pdf_obj(p, p->ps->pdfbody +
951 p->ps->pages * 4);
952 ps_printf(p, "<<\n");
953 ps_printf(p, "/Length %zu 0 R\n",
954 p->ps->pdfbody + 1 + p->ps->pages * 4);
955 ps_printf(p, ">>\nstream\n");
956 }
957 p->ps->pdflastpg = p->ps->pdfbytes;
958 p->ps->flags &= ~PS_NEWPAGE;
959 }
960
961 /*
962 * If we're not in a PostScript "word" context, then open one
963 * now at the current cursor.
964 */
965
966 if ( ! (PS_INLINE & p->ps->flags)) {
967 if (TERMTYPE_PS != p->type) {
968 ps_printf(p, "BT\n/F%d %zu Tf\n",
969 (int)p->ps->lastf, p->ps->scale);
970 ps_printf(p, "%.3f %.3f Td\n(",
971 AFM2PNT(p, p->ps->pscol),
972 AFM2PNT(p, p->ps->psrow));
973 } else
974 ps_printf(p, "%.3f %.3f moveto\n(",
975 AFM2PNT(p, p->ps->pscol),
976 AFM2PNT(p, p->ps->psrow));
977 p->ps->flags |= PS_INLINE;
978 }
979
980 assert( ! (PS_NEWPAGE & p->ps->flags));
981
982 /*
983 * We need to escape these characters as per the PostScript
984 * specification. We would also escape non-graphable characters
985 * (like tabs), but none of them would get to this point and
986 * it's superfluous to abort() on them.
987 */
988
989 switch (c) {
990 case '(':
991 case ')':
992 case '\\':
993 ps_putchar(p, '\\');
994 break;
995 default:
996 break;
997 }
998
999 /* Write the character and adjust where we are on the page. */
1000
1001 f = (int)p->ps->lastf;
1002
1003 if (c <= 32 || c - 32 >= MAXCHAR)
1004 c = 32;
1005
1006 ps_putchar(p, (char)c);
1007 c -= 32;
1008 p->ps->pscol += (size_t)fonts[f].gly[c].wx;
1009 }
1010
1011 static void
1012 ps_pclose(struct termp *p)
1013 {
1014
1015 /*
1016 * Spit out that we're exiting a word context (this is a
1017 * "partial close" because we don't check the last-char buffer
1018 * or anything).
1019 */
1020
1021 if ( ! (PS_INLINE & p->ps->flags))
1022 return;
1023
1024 if (TERMTYPE_PS != p->type) {
1025 ps_printf(p, ") Tj\nET\n");
1026 } else
1027 ps_printf(p, ") show\n");
1028
1029 p->ps->flags &= ~PS_INLINE;
1030 }
1031
1032 /* If we have a `last' char that wasn't printed yet, print it now. */
1033 static void
1034 ps_plast(struct termp *p)
1035 {
1036 size_t wx;
1037
1038 if (p->ps->last == '\0')
1039 return;
1040
1041 /* Check the font mode; open a new scope if it doesn't match. */
1042
1043 if (p->ps->nextf != p->ps->lastf) {
1044 ps_pclose(p);
1045 ps_setfont(p, p->ps->nextf);
1046 }
1047 p->ps->nextf = TERMFONT_NONE;
1048
1049 /*
1050 * For an overstrike, if a previous character
1051 * was wider, advance to center the new one.
1052 */
1053
1054 if (p->ps->pscolnext) {
1055 wx = fonts[p->ps->lastf].gly[(int)p->ps->last-32].wx;
1056 if (p->ps->pscol + wx < p->ps->pscolnext)
1057 p->ps->pscol = (p->ps->pscol +
1058 p->ps->pscolnext - wx) / 2;
1059 }
1060
1061 ps_pletter(p, p->ps->last);
1062 p->ps->last = '\0';
1063
1064 /*
1065 * For an overstrike, if a previous character
1066 * was wider, advance to the end of the old one.
1067 */
1068
1069 if (p->ps->pscol < p->ps->pscolnext) {
1070 ps_pclose(p);
1071 p->ps->pscol = p->ps->pscolnext;
1072 }
1073 }
1074
1075 static void
1076 ps_letter(struct termp *p, int arg)
1077 {
1078 size_t savecol;
1079 char c;
1080
1081 c = arg >= 128 || arg <= 0 ? '?' : arg;
1082
1083 /*
1084 * When receiving a backspace, merely flag it.
1085 * We don't know yet whether it is
1086 * a font instruction or an overstrike.
1087 */
1088
1089 if (c == '\b') {
1090 assert(p->ps->last != '\0');
1091 assert( ! (p->ps->flags & PS_BACKSP));
1092 p->ps->flags |= PS_BACKSP;
1093 return;
1094 }
1095
1096 /*
1097 * Decode font instructions.
1098 */
1099
1100 if (p->ps->flags & PS_BACKSP) {
1101 if (p->ps->last == '_') {
1102 switch (p->ps->nextf) {
1103 case TERMFONT_BI:
1104 break;
1105 case TERMFONT_BOLD:
1106 p->ps->nextf = TERMFONT_BI;
1107 break;
1108 default:
1109 p->ps->nextf = TERMFONT_UNDER;
1110 }
1111 p->ps->last = c;
1112 p->ps->flags &= ~PS_BACKSP;
1113 return;
1114 }
1115 if (p->ps->last == c) {
1116 switch (p->ps->nextf) {
1117 case TERMFONT_BI:
1118 break;
1119 case TERMFONT_UNDER:
1120 p->ps->nextf = TERMFONT_BI;
1121 break;
1122 default:
1123 p->ps->nextf = TERMFONT_BOLD;
1124 }
1125 p->ps->flags &= ~PS_BACKSP;
1126 return;
1127 }
1128
1129 /*
1130 * This is not a font instruction, but rather
1131 * the next character. Prepare for overstrike.
1132 */
1133
1134 savecol = p->ps->pscol;
1135 } else
1136 savecol = SIZE_MAX;
1137
1138 /*
1139 * We found the next character, so the font instructions
1140 * for the previous one are complete.
1141 * Use them and print it.
1142 */
1143
1144 ps_plast(p);
1145
1146 /*
1147 * Do not print the current character yet because font
1148 * instructions might follow; only remember the character.
1149 * It will get printed later from ps_plast().
1150 */
1151
1152 p->ps->last = c;
1153
1154 /*
1155 * For an overstrike, back up to the previous position.
1156 * If the previous character is wider than any it overstrikes,
1157 * remember the current position, because it might also be
1158 * wider than all that will overstrike it.
1159 */
1160
1161 if (savecol != SIZE_MAX) {
1162 if (p->ps->pscolnext < p->ps->pscol)
1163 p->ps->pscolnext = p->ps->pscol;
1164 ps_pclose(p);
1165 p->ps->pscol = savecol;
1166 p->ps->flags &= ~PS_BACKSP;
1167 } else
1168 p->ps->pscolnext = 0;
1169 }
1170
1171 static void
1172 ps_advance(struct termp *p, size_t len)
1173 {
1174
1175 /*
1176 * Advance some spaces. This can probably be made smarter,
1177 * i.e., to have multiple space-separated words in the same
1178 * scope, but this is easier: just close out the current scope
1179 * and readjust our column settings.
1180 */
1181
1182 ps_plast(p);
1183 ps_pclose(p);
1184 p->ps->pscol += len;
1185 }
1186
1187 static void
1188 ps_endline(struct termp *p)
1189 {
1190
1191 /* Close out any scopes we have open: we're at eoln. */
1192
1193 ps_plast(p);
1194 ps_pclose(p);
1195
1196 /*
1197 * If we're in the margin, don't try to recalculate our current
1198 * row. XXX: if the column tries to be fancy with multiple
1199 * lines, we'll do nasty stuff.
1200 */
1201
1202 if (PS_MARGINS & p->ps->flags)
1203 return;
1204
1205 /* Left-justify. */
1206
1207 p->ps->pscol = p->ps->left;
1208
1209 /* If we haven't printed anything, return. */
1210
1211 if (PS_NEWPAGE & p->ps->flags)
1212 return;
1213
1214 /*
1215 * Put us down a line. If we're at the page bottom, spit out a
1216 * showpage and restart our row.
1217 */
1218
1219 if (p->ps->psrow >= p->ps->lineheight + p->ps->bottom) {
1220 p->ps->psrow -= p->ps->lineheight;
1221 return;
1222 }
1223
1224 ps_closepage(p);
1225
1226 p->tcol->offset -= p->ti;
1227 p->ti = 0;
1228 }
1229
1230 static void
1231 ps_setfont(struct termp *p, enum termfont f)
1232 {
1233
1234 assert(f < TERMFONT__MAX);
1235 p->ps->lastf = f;
1236
1237 /*
1238 * If we're still at the top of the page, let the font-setting
1239 * be delayed until we actually have stuff to print.
1240 */
1241
1242 if (PS_NEWPAGE & p->ps->flags)
1243 return;
1244
1245 if (TERMTYPE_PS == p->type)
1246 ps_printf(p, "/%s %zu selectfont\n",
1247 fonts[(int)f].name, p->ps->scale);
1248 else
1249 ps_printf(p, "/F%d %zu Tf\n",
1250 (int)f, p->ps->scale);
1251 }
1252
1253 static size_t
1254 ps_width(const struct termp *p, int c)
1255 {
1256
1257 if (c <= 32 || c - 32 >= MAXCHAR)
1258 c = 0;
1259 else
1260 c -= 32;
1261
1262 return (size_t)fonts[(int)TERMFONT_NONE].gly[c].wx;
1263 }
1264
1265 static int
1266 ps_hspan(const struct termp *p, const struct roffsu *su)
1267 {
1268 double r;
1269
1270 /*
1271 * All of these measurements are derived by converting from the
1272 * native measurement to AFM units.
1273 */
1274 switch (su->unit) {
1275 case SCALE_BU:
1276 /*
1277 * Traditionally, the default unit is fixed to the
1278 * output media. So this would refer to the point. In
1279 * mandoc(1), however, we stick to the default terminal
1280 * scaling unit so that output is the same regardless
1281 * the media.
1282 */
1283 r = PNT2AFM(p, su->scale * 72.0 / 240.0);
1284 break;
1285 case SCALE_CM:
1286 r = PNT2AFM(p, su->scale * 72.0 / 2.54);
1287 break;
1288 case SCALE_EM:
1289 r = su->scale *
1290 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx;
1291 break;
1292 case SCALE_EN:
1293 r = su->scale *
1294 fonts[(int)TERMFONT_NONE].gly[110 - 32].wx;
1295 break;
1296 case SCALE_IN:
1297 r = PNT2AFM(p, su->scale * 72.0);
1298 break;
1299 case SCALE_MM:
1300 r = su->scale *
1301 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx / 100.0;
1302 break;
1303 case SCALE_PC:
1304 r = PNT2AFM(p, su->scale * 12.0);
1305 break;
1306 case SCALE_PT:
1307 r = PNT2AFM(p, su->scale * 1.0);
1308 break;
1309 case SCALE_VS:
1310 r = su->scale * p->ps->lineheight;
1311 break;
1312 default:
1313 r = su->scale;
1314 break;
1315 }
1316
1317 return r * 24.0;
1318 }
1319
1320 static void
1321 ps_growbuf(struct termp *p, size_t sz)
1322 {
1323 if (p->ps->psmargcur + sz <= p->ps->psmargsz)
1324 return;
1325
1326 if (sz < PS_BUFSLOP)
1327 sz = PS_BUFSLOP;
1328
1329 p->ps->psmargsz += sz;
1330 p->ps->psmarg = mandoc_realloc(p->ps->psmarg, p->ps->psmargsz);
1331 }