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Major character table cleanup:
[mandoc.git] / term_ps.c
1 /* $Id: term_ps.c,v 1.78 2015/10/13 22:59:54 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 <err.h>
24 #include <stdarg.h>
25 #include <stdint.h>
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <string.h>
29 #include <unistd.h>
30
31 #include "mandoc_aux.h"
32 #include "out.h"
33 #include "term.h"
34 #include "manconf.h"
35 #include "main.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 #define PS_BACKSP (1 << 3) /* last character was backspace */
64 size_t pscol; /* visible column (AFM units) */
65 size_t pscolnext; /* used for overstrike */
66 size_t psrow; /* visible row (AFM units) */
67 char *psmarg; /* margin buf */
68 size_t psmargsz; /* margin buf size */
69 size_t psmargcur; /* cur index in margin buf */
70 char last; /* last non-backspace seen */
71 enum termfont lastf; /* last set font */
72 enum termfont nextf; /* building next font here */
73 size_t scale; /* font scaling factor */
74 size_t pages; /* number of pages shown */
75 size_t lineheight; /* line height (AFM units) */
76 size_t top; /* body top (AFM units) */
77 size_t bottom; /* body bottom (AFM units) */
78 size_t height; /* page height (AFM units */
79 size_t width; /* page width (AFM units) */
80 size_t lastwidth; /* page width before last ll */
81 size_t left; /* body left (AFM units) */
82 size_t header; /* header pos (AFM units) */
83 size_t footer; /* footer pos (AFM units) */
84 size_t pdfbytes; /* current output byte */
85 size_t pdflastpg; /* byte of last page mark */
86 size_t pdfbody; /* start of body object */
87 size_t *pdfobjs; /* table of object offsets */
88 size_t pdfobjsz; /* size of pdfobjs */
89 };
90
91 static int ps_hspan(const struct termp *,
92 const struct roffsu *);
93 static size_t ps_width(const struct termp *, int);
94 static void ps_advance(struct termp *, size_t);
95 static void ps_begin(struct termp *);
96 static void ps_closepage(struct termp *);
97 static void ps_end(struct termp *);
98 static void ps_endline(struct termp *);
99 static void ps_fclose(struct termp *);
100 static void ps_growbuf(struct termp *, size_t);
101 static void ps_letter(struct termp *, int);
102 static void ps_pclose(struct termp *);
103 static void ps_pletter(struct termp *, int);
104 #if __GNUC__ - 0 >= 4
105 __attribute__((__format__ (__printf__, 2, 3)))
106 #endif
107 static void ps_printf(struct termp *, const char *, ...);
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(struct termp));
542 p->enc = TERMENC_ASCII;
543 p->fontq = mandoc_reallocarray(NULL,
544 (p->fontsz = 8), sizeof(enum termfont));
545 p->fontq[0] = p->fontl = TERMFONT_NONE;
546 p->ps = mandoc_calloc(1, sizeof(struct termp_ps));
547
548 p->advance = ps_advance;
549 p->begin = ps_begin;
550 p->end = ps_end;
551 p->endline = ps_endline;
552 p->hspan = ps_hspan;
553 p->letter = ps_letter;
554 p->setwidth = ps_setwidth;
555 p->width = ps_width;
556
557 /* Default to US letter (millimetres). */
558
559 pagex = 216;
560 pagey = 279;
561
562 /*
563 * The ISO-269 paper sizes can be calculated automatically, but
564 * it would require bringing in -lm for pow() and I'd rather not
565 * do that. So just do it the easy way for now. Since this
566 * only happens once, I'm not terribly concerned.
567 */
568
569 pp = outopts->paper;
570 if (pp && strcasecmp(pp, "letter")) {
571 if (0 == strcasecmp(pp, "a3")) {
572 pagex = 297;
573 pagey = 420;
574 } else if (0 == strcasecmp(pp, "a4")) {
575 pagex = 210;
576 pagey = 297;
577 } else if (0 == strcasecmp(pp, "a5")) {
578 pagex = 148;
579 pagey = 210;
580 } else if (0 == strcasecmp(pp, "legal")) {
581 pagex = 216;
582 pagey = 356;
583 } else if (2 != sscanf(pp, "%ux%u", &pagex, &pagey))
584 warnx("%s: Unknown paper", pp);
585 }
586
587 /*
588 * This MUST be defined before any PNT2AFM or AFM2PNT
589 * calculations occur.
590 */
591
592 p->ps->scale = 11;
593
594 /* Remember millimetres -> AFM units. */
595
596 pagex = PNT2AFM(p, ((double)pagex * 2.834));
597 pagey = PNT2AFM(p, ((double)pagey * 2.834));
598
599 /* Margins are 1/9 the page x and y. */
600
601 marginx = (size_t)((double)pagex / 9.0);
602 marginy = (size_t)((double)pagey / 9.0);
603
604 /* Line-height is 1.4em. */
605
606 lineheight = PNT2AFM(p, ((double)p->ps->scale * 1.4));
607
608 p->ps->width = p->ps->lastwidth = (size_t)pagex;
609 p->ps->height = (size_t)pagey;
610 p->ps->header = pagey - (marginy / 2) - (lineheight / 2);
611 p->ps->top = pagey - marginy;
612 p->ps->footer = (marginy / 2) - (lineheight / 2);
613 p->ps->bottom = marginy;
614 p->ps->left = marginx;
615 p->ps->lineheight = lineheight;
616
617 p->defrmargin = pagex - (marginx * 2);
618 return p;
619 }
620
621 static void
622 ps_setwidth(struct termp *p, int iop, int width)
623 {
624 size_t lastwidth;
625
626 lastwidth = p->ps->width;
627 if (iop > 0)
628 p->ps->width += width;
629 else if (iop == 0)
630 p->ps->width = width ? (size_t)width : p->ps->lastwidth;
631 else if (p->ps->width > (size_t)width)
632 p->ps->width -= width;
633 else
634 p->ps->width = 0;
635 p->ps->lastwidth = lastwidth;
636 }
637
638 void
639 pspdf_free(void *arg)
640 {
641 struct termp *p;
642
643 p = (struct termp *)arg;
644
645 if (p->ps->psmarg)
646 free(p->ps->psmarg);
647 if (p->ps->pdfobjs)
648 free(p->ps->pdfobjs);
649
650 free(p->ps);
651 term_free(p);
652 }
653
654 static void
655 ps_printf(struct termp *p, const char *fmt, ...)
656 {
657 va_list ap;
658 int pos, len;
659
660 va_start(ap, fmt);
661
662 /*
663 * If we're running in regular mode, then pipe directly into
664 * vprintf(). If we're processing margins, then push the data
665 * into our growable margin buffer.
666 */
667
668 if ( ! (PS_MARGINS & p->ps->flags)) {
669 len = vprintf(fmt, ap);
670 va_end(ap);
671 p->ps->pdfbytes += len < 0 ? 0 : (size_t)len;
672 return;
673 }
674
675 /*
676 * XXX: I assume that the in-margin print won't exceed
677 * PS_BUFSLOP (128 bytes), which is reasonable but still an
678 * assumption that will cause pukeage if it's not the case.
679 */
680
681 ps_growbuf(p, PS_BUFSLOP);
682
683 pos = (int)p->ps->psmargcur;
684 vsnprintf(&p->ps->psmarg[pos], PS_BUFSLOP, fmt, ap);
685
686 va_end(ap);
687
688 p->ps->psmargcur = strlen(p->ps->psmarg);
689 }
690
691 static void
692 ps_putchar(struct termp *p, char c)
693 {
694 int pos;
695
696 /* See ps_printf(). */
697
698 if ( ! (PS_MARGINS & p->ps->flags)) {
699 putchar(c);
700 p->ps->pdfbytes++;
701 return;
702 }
703
704 ps_growbuf(p, 2);
705
706 pos = (int)p->ps->psmargcur++;
707 p->ps->psmarg[pos++] = c;
708 p->ps->psmarg[pos] = '\0';
709 }
710
711 static void
712 pdf_obj(struct termp *p, size_t obj)
713 {
714
715 assert(obj > 0);
716
717 if ((obj - 1) >= p->ps->pdfobjsz) {
718 p->ps->pdfobjsz = obj + 128;
719 p->ps->pdfobjs = mandoc_reallocarray(p->ps->pdfobjs,
720 p->ps->pdfobjsz, sizeof(size_t));
721 }
722
723 p->ps->pdfobjs[(int)obj - 1] = p->ps->pdfbytes;
724 ps_printf(p, "%zu 0 obj\n", obj);
725 }
726
727 static void
728 ps_closepage(struct termp *p)
729 {
730 int i;
731 size_t len, base;
732
733 /*
734 * Close out a page that we've already flushed to output. In
735 * PostScript, we simply note that the page must be showed. In
736 * PDF, we must now create the Length, Resource, and Page node
737 * for the page contents.
738 */
739
740 assert(p->ps->psmarg && p->ps->psmarg[0]);
741 ps_printf(p, "%s", p->ps->psmarg);
742
743 if (TERMTYPE_PS != p->type) {
744 ps_printf(p, "ET\n");
745
746 len = p->ps->pdfbytes - p->ps->pdflastpg;
747 base = p->ps->pages * 4 + p->ps->pdfbody;
748
749 ps_printf(p, "endstream\nendobj\n");
750
751 /* Length of content. */
752 pdf_obj(p, base + 1);
753 ps_printf(p, "%zu\nendobj\n", len);
754
755 /* Resource for content. */
756 pdf_obj(p, base + 2);
757 ps_printf(p, "<<\n/ProcSet [/PDF /Text]\n");
758 ps_printf(p, "/Font <<\n");
759 for (i = 0; i < (int)TERMFONT__MAX; i++)
760 ps_printf(p, "/F%d %d 0 R\n", i, 3 + i);
761 ps_printf(p, ">>\n>>\n");
762
763 /* Page node. */
764 pdf_obj(p, base + 3);
765 ps_printf(p, "<<\n");
766 ps_printf(p, "/Type /Page\n");
767 ps_printf(p, "/Parent 2 0 R\n");
768 ps_printf(p, "/Resources %zu 0 R\n", base + 2);
769 ps_printf(p, "/Contents %zu 0 R\n", base);
770 ps_printf(p, ">>\nendobj\n");
771 } else
772 ps_printf(p, "showpage\n");
773
774 p->ps->pages++;
775 p->ps->psrow = p->ps->top;
776 assert( ! (PS_NEWPAGE & p->ps->flags));
777 p->ps->flags |= PS_NEWPAGE;
778 }
779
780 static void
781 ps_end(struct termp *p)
782 {
783 size_t i, xref, base;
784
785 /*
786 * At the end of the file, do one last showpage. This is the
787 * same behaviour as groff(1) and works for multiple pages as
788 * well as just one.
789 */
790
791 if ( ! (PS_NEWPAGE & p->ps->flags)) {
792 assert(0 == p->ps->flags);
793 assert('\0' == p->ps->last);
794 ps_closepage(p);
795 }
796
797 if (TERMTYPE_PS == p->type) {
798 ps_printf(p, "%%%%Trailer\n");
799 ps_printf(p, "%%%%Pages: %zu\n", p->ps->pages);
800 ps_printf(p, "%%%%EOF\n");
801 return;
802 }
803
804 pdf_obj(p, 2);
805 ps_printf(p, "<<\n/Type /Pages\n");
806 ps_printf(p, "/MediaBox [0 0 %zu %zu]\n",
807 (size_t)AFM2PNT(p, p->ps->width),
808 (size_t)AFM2PNT(p, p->ps->height));
809
810 ps_printf(p, "/Count %zu\n", p->ps->pages);
811 ps_printf(p, "/Kids [");
812
813 for (i = 0; i < p->ps->pages; i++)
814 ps_printf(p, " %zu 0 R", i * 4 + p->ps->pdfbody + 3);
815
816 base = (p->ps->pages - 1) * 4 + p->ps->pdfbody + 4;
817
818 ps_printf(p, "]\n>>\nendobj\n");
819 pdf_obj(p, base);
820 ps_printf(p, "<<\n");
821 ps_printf(p, "/Type /Catalog\n");
822 ps_printf(p, "/Pages 2 0 R\n");
823 ps_printf(p, ">>\n");
824 xref = p->ps->pdfbytes;
825 ps_printf(p, "xref\n");
826 ps_printf(p, "0 %zu\n", base + 1);
827 ps_printf(p, "0000000000 65535 f \n");
828
829 for (i = 0; i < base; i++)
830 ps_printf(p, "%.10zu 00000 n \n",
831 p->ps->pdfobjs[(int)i]);
832
833 ps_printf(p, "trailer\n");
834 ps_printf(p, "<<\n");
835 ps_printf(p, "/Size %zu\n", base + 1);
836 ps_printf(p, "/Root %zu 0 R\n", base);
837 ps_printf(p, "/Info 1 0 R\n");
838 ps_printf(p, ">>\n");
839 ps_printf(p, "startxref\n");
840 ps_printf(p, "%zu\n", xref);
841 ps_printf(p, "%%%%EOF\n");
842 }
843
844 static void
845 ps_begin(struct termp *p)
846 {
847 int i;
848
849 /*
850 * Print margins into margin buffer. Nothing gets output to the
851 * screen yet, so we don't need to initialise the primary state.
852 */
853
854 if (p->ps->psmarg) {
855 assert(p->ps->psmargsz);
856 p->ps->psmarg[0] = '\0';
857 }
858
859 /*p->ps->pdfbytes = 0;*/
860 p->ps->psmargcur = 0;
861 p->ps->flags = PS_MARGINS;
862 p->ps->pscol = p->ps->left;
863 p->ps->psrow = p->ps->header;
864
865 ps_setfont(p, TERMFONT_NONE);
866
867 (*p->headf)(p, p->argf);
868 (*p->endline)(p);
869
870 p->ps->pscol = p->ps->left;
871 p->ps->psrow = p->ps->footer;
872
873 (*p->footf)(p, p->argf);
874 (*p->endline)(p);
875
876 p->ps->flags &= ~PS_MARGINS;
877
878 assert(0 == p->ps->flags);
879 assert(p->ps->psmarg);
880 assert('\0' != p->ps->psmarg[0]);
881
882 /*
883 * Print header and initialise page state. Following this,
884 * stuff gets printed to the screen, so make sure we're sane.
885 */
886
887 if (TERMTYPE_PS == p->type) {
888 ps_printf(p, "%%!PS-Adobe-3.0\n");
889 ps_printf(p, "%%%%DocumentData: Clean7Bit\n");
890 ps_printf(p, "%%%%Orientation: Portrait\n");
891 ps_printf(p, "%%%%Pages: (atend)\n");
892 ps_printf(p, "%%%%PageOrder: Ascend\n");
893 ps_printf(p, "%%%%DocumentMedia: "
894 "Default %zu %zu 0 () ()\n",
895 (size_t)AFM2PNT(p, p->ps->width),
896 (size_t)AFM2PNT(p, p->ps->height));
897 ps_printf(p, "%%%%DocumentNeededResources: font");
898
899 for (i = 0; i < (int)TERMFONT__MAX; i++)
900 ps_printf(p, " %s", fonts[i].name);
901
902 ps_printf(p, "\n%%%%EndComments\n");
903 } else {
904 ps_printf(p, "%%PDF-1.1\n");
905 pdf_obj(p, 1);
906 ps_printf(p, "<<\n");
907 ps_printf(p, ">>\n");
908 ps_printf(p, "endobj\n");
909
910 for (i = 0; i < (int)TERMFONT__MAX; i++) {
911 pdf_obj(p, (size_t)i + 3);
912 ps_printf(p, "<<\n");
913 ps_printf(p, "/Type /Font\n");
914 ps_printf(p, "/Subtype /Type1\n");
915 ps_printf(p, "/Name /F%d\n", i);
916 ps_printf(p, "/BaseFont /%s\n", fonts[i].name);
917 ps_printf(p, ">>\n");
918 }
919 }
920
921 p->ps->pdfbody = (size_t)TERMFONT__MAX + 3;
922 p->ps->pscol = p->ps->left;
923 p->ps->psrow = p->ps->top;
924 p->ps->flags |= PS_NEWPAGE;
925 ps_setfont(p, TERMFONT_NONE);
926 }
927
928 static void
929 ps_pletter(struct termp *p, int c)
930 {
931 int f;
932
933 /*
934 * If we haven't opened a page context, then output that we're
935 * in a new page and make sure the font is correctly set.
936 */
937
938 if (PS_NEWPAGE & p->ps->flags) {
939 if (TERMTYPE_PS == p->type) {
940 ps_printf(p, "%%%%Page: %zu %zu\n",
941 p->ps->pages + 1, p->ps->pages + 1);
942 ps_printf(p, "/%s %zu selectfont\n",
943 fonts[(int)p->ps->lastf].name,
944 p->ps->scale);
945 } else {
946 pdf_obj(p, p->ps->pdfbody +
947 p->ps->pages * 4);
948 ps_printf(p, "<<\n");
949 ps_printf(p, "/Length %zu 0 R\n",
950 p->ps->pdfbody + 1 + p->ps->pages * 4);
951 ps_printf(p, ">>\nstream\n");
952 }
953 p->ps->pdflastpg = p->ps->pdfbytes;
954 p->ps->flags &= ~PS_NEWPAGE;
955 }
956
957 /*
958 * If we're not in a PostScript "word" context, then open one
959 * now at the current cursor.
960 */
961
962 if ( ! (PS_INLINE & p->ps->flags)) {
963 if (TERMTYPE_PS != p->type) {
964 ps_printf(p, "BT\n/F%d %zu Tf\n",
965 (int)p->ps->lastf, p->ps->scale);
966 ps_printf(p, "%.3f %.3f Td\n(",
967 AFM2PNT(p, p->ps->pscol),
968 AFM2PNT(p, p->ps->psrow));
969 } else
970 ps_printf(p, "%.3f %.3f moveto\n(",
971 AFM2PNT(p, p->ps->pscol),
972 AFM2PNT(p, p->ps->psrow));
973 p->ps->flags |= PS_INLINE;
974 }
975
976 assert( ! (PS_NEWPAGE & p->ps->flags));
977
978 /*
979 * We need to escape these characters as per the PostScript
980 * specification. We would also escape non-graphable characters
981 * (like tabs), but none of them would get to this point and
982 * it's superfluous to abort() on them.
983 */
984
985 switch (c) {
986 case '(':
987 case ')':
988 case '\\':
989 ps_putchar(p, '\\');
990 break;
991 default:
992 break;
993 }
994
995 /* Write the character and adjust where we are on the page. */
996
997 f = (int)p->ps->lastf;
998
999 if (c <= 32 || c - 32 >= MAXCHAR)
1000 c = 32;
1001
1002 ps_putchar(p, (char)c);
1003 c -= 32;
1004 p->ps->pscol += (size_t)fonts[f].gly[c].wx;
1005 }
1006
1007 static void
1008 ps_pclose(struct termp *p)
1009 {
1010
1011 /*
1012 * Spit out that we're exiting a word context (this is a
1013 * "partial close" because we don't check the last-char buffer
1014 * or anything).
1015 */
1016
1017 if ( ! (PS_INLINE & p->ps->flags))
1018 return;
1019
1020 if (TERMTYPE_PS != p->type) {
1021 ps_printf(p, ") Tj\nET\n");
1022 } else
1023 ps_printf(p, ") show\n");
1024
1025 p->ps->flags &= ~PS_INLINE;
1026 }
1027
1028 static void
1029 ps_fclose(struct termp *p)
1030 {
1031
1032 /*
1033 * Strong closure: if we have a last-char, spit it out after
1034 * checking that we're in the right font mode. This will of
1035 * course open a new scope, if applicable.
1036 *
1037 * Following this, close out any scope that's open.
1038 */
1039
1040 if (p->ps->last != '\0') {
1041 assert( ! (p->ps->flags & PS_BACKSP));
1042 if (p->ps->nextf != p->ps->lastf) {
1043 ps_pclose(p);
1044 ps_setfont(p, p->ps->nextf);
1045 }
1046 p->ps->nextf = TERMFONT_NONE;
1047 ps_pletter(p, p->ps->last);
1048 p->ps->last = '\0';
1049 }
1050
1051 if ( ! (PS_INLINE & p->ps->flags))
1052 return;
1053
1054 ps_pclose(p);
1055 }
1056
1057 static void
1058 ps_letter(struct termp *p, int arg)
1059 {
1060 size_t savecol, wx;
1061 char c;
1062
1063 c = arg >= 128 || arg <= 0 ? '?' : arg;
1064
1065 /*
1066 * When receiving a backspace, merely flag it.
1067 * We don't know yet whether it is
1068 * a font instruction or an overstrike.
1069 */
1070
1071 if (c == '\b') {
1072 assert(p->ps->last != '\0');
1073 assert( ! (p->ps->flags & PS_BACKSP));
1074 p->ps->flags |= PS_BACKSP;
1075 return;
1076 }
1077
1078 /*
1079 * Decode font instructions.
1080 */
1081
1082 if (p->ps->flags & PS_BACKSP) {
1083 if (p->ps->last == '_') {
1084 switch (p->ps->nextf) {
1085 case TERMFONT_BI:
1086 break;
1087 case TERMFONT_BOLD:
1088 p->ps->nextf = TERMFONT_BI;
1089 break;
1090 default:
1091 p->ps->nextf = TERMFONT_UNDER;
1092 }
1093 p->ps->last = c;
1094 p->ps->flags &= ~PS_BACKSP;
1095 return;
1096 }
1097 if (p->ps->last == c) {
1098 switch (p->ps->nextf) {
1099 case TERMFONT_BI:
1100 break;
1101 case TERMFONT_UNDER:
1102 p->ps->nextf = TERMFONT_BI;
1103 break;
1104 default:
1105 p->ps->nextf = TERMFONT_BOLD;
1106 }
1107 p->ps->flags &= ~PS_BACKSP;
1108 return;
1109 }
1110
1111 /*
1112 * This is not a font instruction, but rather
1113 * the next character. Prepare for overstrike.
1114 */
1115
1116 savecol = p->ps->pscol;
1117 } else
1118 savecol = SIZE_MAX;
1119
1120 /*
1121 * We found the next character, so the font instructions
1122 * for the previous one are complete.
1123 * Use them and print it.
1124 */
1125
1126 if (p->ps->last != '\0') {
1127 if (p->ps->nextf != p->ps->lastf) {
1128 ps_pclose(p);
1129 ps_setfont(p, p->ps->nextf);
1130 }
1131 p->ps->nextf = TERMFONT_NONE;
1132
1133 /*
1134 * For an overstrike, if a previous character
1135 * was wider, advance to center the new one.
1136 */
1137
1138 if (p->ps->pscolnext) {
1139 wx = fonts[p->ps->lastf].gly[(int)p->ps->last-32].wx;
1140 if (p->ps->pscol + wx < p->ps->pscolnext)
1141 p->ps->pscol = (p->ps->pscol +
1142 p->ps->pscolnext - wx) / 2;
1143 }
1144
1145 ps_pletter(p, p->ps->last);
1146
1147 /*
1148 * For an overstrike, if a previous character
1149 * was wider, advance to the end of the old one.
1150 */
1151
1152 if (p->ps->pscol < p->ps->pscolnext) {
1153 ps_pclose(p);
1154 p->ps->pscol = p->ps->pscolnext;
1155 }
1156 }
1157
1158 /*
1159 * Do not print the current character yet because font
1160 * instructions might follow; only remember it.
1161 * For the first character, nothing else is done.
1162 * The final character will get printed from ps_fclose().
1163 */
1164
1165 p->ps->last = c;
1166
1167 /*
1168 * For an overstrike, back up to the previous position.
1169 * If the previous character is wider than any it overstrikes,
1170 * remember the current position, because it might also be
1171 * wider than all that will overstrike it.
1172 */
1173
1174 if (savecol != SIZE_MAX) {
1175 if (p->ps->pscolnext < p->ps->pscol)
1176 p->ps->pscolnext = p->ps->pscol;
1177 ps_pclose(p);
1178 p->ps->pscol = savecol;
1179 p->ps->flags &= ~PS_BACKSP;
1180 } else
1181 p->ps->pscolnext = 0;
1182 }
1183
1184 static void
1185 ps_advance(struct termp *p, size_t len)
1186 {
1187
1188 /*
1189 * Advance some spaces. This can probably be made smarter,
1190 * i.e., to have multiple space-separated words in the same
1191 * scope, but this is easier: just close out the current scope
1192 * and readjust our column settings.
1193 */
1194
1195 ps_fclose(p);
1196 p->ps->pscol += len;
1197 }
1198
1199 static void
1200 ps_endline(struct termp *p)
1201 {
1202
1203 /* Close out any scopes we have open: we're at eoln. */
1204
1205 ps_fclose(p);
1206
1207 /*
1208 * If we're in the margin, don't try to recalculate our current
1209 * row. XXX: if the column tries to be fancy with multiple
1210 * lines, we'll do nasty stuff.
1211 */
1212
1213 if (PS_MARGINS & p->ps->flags)
1214 return;
1215
1216 /* Left-justify. */
1217
1218 p->ps->pscol = p->ps->left;
1219
1220 /* If we haven't printed anything, return. */
1221
1222 if (PS_NEWPAGE & p->ps->flags)
1223 return;
1224
1225 /*
1226 * Put us down a line. If we're at the page bottom, spit out a
1227 * showpage and restart our row.
1228 */
1229
1230 if (p->ps->psrow >= p->ps->lineheight + p->ps->bottom) {
1231 p->ps->psrow -= p->ps->lineheight;
1232 return;
1233 }
1234
1235 ps_closepage(p);
1236 }
1237
1238 static void
1239 ps_setfont(struct termp *p, enum termfont f)
1240 {
1241
1242 assert(f < TERMFONT__MAX);
1243 p->ps->lastf = f;
1244
1245 /*
1246 * If we're still at the top of the page, let the font-setting
1247 * be delayed until we actually have stuff to print.
1248 */
1249
1250 if (PS_NEWPAGE & p->ps->flags)
1251 return;
1252
1253 if (TERMTYPE_PS == p->type)
1254 ps_printf(p, "/%s %zu selectfont\n",
1255 fonts[(int)f].name, p->ps->scale);
1256 else
1257 ps_printf(p, "/F%d %zu Tf\n",
1258 (int)f, p->ps->scale);
1259 }
1260
1261 static size_t
1262 ps_width(const struct termp *p, int c)
1263 {
1264
1265 if (c <= 32 || c - 32 >= MAXCHAR)
1266 c = 0;
1267 else
1268 c -= 32;
1269
1270 return (size_t)fonts[(int)TERMFONT_NONE].gly[c].wx;
1271 }
1272
1273 static int
1274 ps_hspan(const struct termp *p, const struct roffsu *su)
1275 {
1276 double r;
1277
1278 /*
1279 * All of these measurements are derived by converting from the
1280 * native measurement to AFM units.
1281 */
1282 switch (su->unit) {
1283 case SCALE_BU:
1284 /*
1285 * Traditionally, the default unit is fixed to the
1286 * output media. So this would refer to the point. In
1287 * mandoc(1), however, we stick to the default terminal
1288 * scaling unit so that output is the same regardless
1289 * the media.
1290 */
1291 r = PNT2AFM(p, su->scale * 72.0 / 240.0);
1292 break;
1293 case SCALE_CM:
1294 r = PNT2AFM(p, su->scale * 72.0 / 2.54);
1295 break;
1296 case SCALE_EM:
1297 r = su->scale *
1298 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx;
1299 break;
1300 case SCALE_EN:
1301 r = su->scale *
1302 fonts[(int)TERMFONT_NONE].gly[110 - 32].wx;
1303 break;
1304 case SCALE_IN:
1305 r = PNT2AFM(p, su->scale * 72.0);
1306 break;
1307 case SCALE_MM:
1308 r = su->scale *
1309 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx / 100.0;
1310 break;
1311 case SCALE_PC:
1312 r = PNT2AFM(p, su->scale * 12.0);
1313 break;
1314 case SCALE_PT:
1315 r = PNT2AFM(p, su->scale * 1.0);
1316 break;
1317 case SCALE_VS:
1318 r = su->scale * p->ps->lineheight;
1319 break;
1320 default:
1321 r = su->scale;
1322 break;
1323 }
1324
1325 return r * 24.0;
1326 }
1327
1328 static void
1329 ps_growbuf(struct termp *p, size_t sz)
1330 {
1331 if (p->ps->psmargcur + sz <= p->ps->psmargsz)
1332 return;
1333
1334 if (sz < PS_BUFSLOP)
1335 sz = PS_BUFSLOP;
1336
1337 p->ps->psmargsz += sz;
1338 p->ps->psmarg = mandoc_realloc(p->ps->psmarg, p->ps->psmargsz);
1339 }
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