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Use __attribute__((__format__ throughout.
[mandoc.git] / term_ps.c
1 /* $Id: term_ps.c,v 1.81 2016/07/19 13:36:13 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 #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_fclose(struct termp *);
102 static void ps_growbuf(struct termp *, size_t);
103 static void ps_letter(struct termp *, int);
104 static void ps_pclose(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(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 free(p->ps->psmarg);
646 free(p->ps->pdfobjs);
647
648 free(p->ps);
649 term_free(p);
650 }
651
652 static void
653 ps_printf(struct termp *p, const char *fmt, ...)
654 {
655 va_list ap;
656 int pos, len;
657
658 va_start(ap, fmt);
659
660 /*
661 * If we're running in regular mode, then pipe directly into
662 * vprintf(). If we're processing margins, then push the data
663 * into our growable margin buffer.
664 */
665
666 if ( ! (PS_MARGINS & p->ps->flags)) {
667 len = vprintf(fmt, ap);
668 va_end(ap);
669 p->ps->pdfbytes += len < 0 ? 0 : (size_t)len;
670 return;
671 }
672
673 /*
674 * XXX: I assume that the in-margin print won't exceed
675 * PS_BUFSLOP (128 bytes), which is reasonable but still an
676 * assumption that will cause pukeage if it's not the case.
677 */
678
679 ps_growbuf(p, PS_BUFSLOP);
680
681 pos = (int)p->ps->psmargcur;
682 vsnprintf(&p->ps->psmarg[pos], PS_BUFSLOP, fmt, ap);
683
684 va_end(ap);
685
686 p->ps->psmargcur = strlen(p->ps->psmarg);
687 }
688
689 static void
690 ps_putchar(struct termp *p, char c)
691 {
692 int pos;
693
694 /* See ps_printf(). */
695
696 if ( ! (PS_MARGINS & p->ps->flags)) {
697 putchar(c);
698 p->ps->pdfbytes++;
699 return;
700 }
701
702 ps_growbuf(p, 2);
703
704 pos = (int)p->ps->psmargcur++;
705 p->ps->psmarg[pos++] = c;
706 p->ps->psmarg[pos] = '\0';
707 }
708
709 static void
710 pdf_obj(struct termp *p, size_t obj)
711 {
712
713 assert(obj > 0);
714
715 if ((obj - 1) >= p->ps->pdfobjsz) {
716 p->ps->pdfobjsz = obj + 128;
717 p->ps->pdfobjs = mandoc_reallocarray(p->ps->pdfobjs,
718 p->ps->pdfobjsz, sizeof(size_t));
719 }
720
721 p->ps->pdfobjs[(int)obj - 1] = p->ps->pdfbytes;
722 ps_printf(p, "%zu 0 obj\n", obj);
723 }
724
725 static void
726 ps_closepage(struct termp *p)
727 {
728 int i;
729 size_t len, base;
730
731 /*
732 * Close out a page that we've already flushed to output. In
733 * PostScript, we simply note that the page must be showed. In
734 * PDF, we must now create the Length, Resource, and Page node
735 * for the page contents.
736 */
737
738 assert(p->ps->psmarg && p->ps->psmarg[0]);
739 ps_printf(p, "%s", p->ps->psmarg);
740
741 if (TERMTYPE_PS != p->type) {
742 ps_printf(p, "ET\n");
743
744 len = p->ps->pdfbytes - p->ps->pdflastpg;
745 base = p->ps->pages * 4 + p->ps->pdfbody;
746
747 ps_printf(p, "endstream\nendobj\n");
748
749 /* Length of content. */
750 pdf_obj(p, base + 1);
751 ps_printf(p, "%zu\nendobj\n", len);
752
753 /* Resource for content. */
754 pdf_obj(p, base + 2);
755 ps_printf(p, "<<\n/ProcSet [/PDF /Text]\n");
756 ps_printf(p, "/Font <<\n");
757 for (i = 0; i < (int)TERMFONT__MAX; i++)
758 ps_printf(p, "/F%d %d 0 R\n", i, 3 + i);
759 ps_printf(p, ">>\n>>\n");
760
761 /* Page node. */
762 pdf_obj(p, base + 3);
763 ps_printf(p, "<<\n");
764 ps_printf(p, "/Type /Page\n");
765 ps_printf(p, "/Parent 2 0 R\n");
766 ps_printf(p, "/Resources %zu 0 R\n", base + 2);
767 ps_printf(p, "/Contents %zu 0 R\n", base);
768 ps_printf(p, ">>\nendobj\n");
769 } else
770 ps_printf(p, "showpage\n");
771
772 p->ps->pages++;
773 p->ps->psrow = p->ps->top;
774 assert( ! (PS_NEWPAGE & p->ps->flags));
775 p->ps->flags |= PS_NEWPAGE;
776 }
777
778 static void
779 ps_end(struct termp *p)
780 {
781 size_t i, xref, base;
782
783 /*
784 * At the end of the file, do one last showpage. This is the
785 * same behaviour as groff(1) and works for multiple pages as
786 * well as just one.
787 */
788
789 if ( ! (PS_NEWPAGE & p->ps->flags)) {
790 assert(0 == p->ps->flags);
791 assert('\0' == p->ps->last);
792 ps_closepage(p);
793 }
794
795 if (TERMTYPE_PS == p->type) {
796 ps_printf(p, "%%%%Trailer\n");
797 ps_printf(p, "%%%%Pages: %zu\n", p->ps->pages);
798 ps_printf(p, "%%%%EOF\n");
799 return;
800 }
801
802 pdf_obj(p, 2);
803 ps_printf(p, "<<\n/Type /Pages\n");
804 ps_printf(p, "/MediaBox [0 0 %zu %zu]\n",
805 (size_t)AFM2PNT(p, p->ps->width),
806 (size_t)AFM2PNT(p, p->ps->height));
807
808 ps_printf(p, "/Count %zu\n", p->ps->pages);
809 ps_printf(p, "/Kids [");
810
811 for (i = 0; i < p->ps->pages; i++)
812 ps_printf(p, " %zu 0 R", i * 4 + p->ps->pdfbody + 3);
813
814 base = (p->ps->pages - 1) * 4 + p->ps->pdfbody + 4;
815
816 ps_printf(p, "]\n>>\nendobj\n");
817 pdf_obj(p, base);
818 ps_printf(p, "<<\n");
819 ps_printf(p, "/Type /Catalog\n");
820 ps_printf(p, "/Pages 2 0 R\n");
821 ps_printf(p, ">>\n");
822 xref = p->ps->pdfbytes;
823 ps_printf(p, "xref\n");
824 ps_printf(p, "0 %zu\n", base + 1);
825 ps_printf(p, "0000000000 65535 f \n");
826
827 for (i = 0; i < base; i++)
828 ps_printf(p, "%.10zu 00000 n \n",
829 p->ps->pdfobjs[(int)i]);
830
831 ps_printf(p, "trailer\n");
832 ps_printf(p, "<<\n");
833 ps_printf(p, "/Size %zu\n", base + 1);
834 ps_printf(p, "/Root %zu 0 R\n", base);
835 ps_printf(p, "/Info 1 0 R\n");
836 ps_printf(p, ">>\n");
837 ps_printf(p, "startxref\n");
838 ps_printf(p, "%zu\n", xref);
839 ps_printf(p, "%%%%EOF\n");
840 }
841
842 static void
843 ps_begin(struct termp *p)
844 {
845 int i;
846
847 /*
848 * Print margins into margin buffer. Nothing gets output to the
849 * screen yet, so we don't need to initialise the primary state.
850 */
851
852 if (p->ps->psmarg) {
853 assert(p->ps->psmargsz);
854 p->ps->psmarg[0] = '\0';
855 }
856
857 /*p->ps->pdfbytes = 0;*/
858 p->ps->psmargcur = 0;
859 p->ps->flags = PS_MARGINS;
860 p->ps->pscol = p->ps->left;
861 p->ps->psrow = p->ps->header;
862
863 ps_setfont(p, TERMFONT_NONE);
864
865 (*p->headf)(p, p->argf);
866 (*p->endline)(p);
867
868 p->ps->pscol = p->ps->left;
869 p->ps->psrow = p->ps->footer;
870
871 (*p->footf)(p, p->argf);
872 (*p->endline)(p);
873
874 p->ps->flags &= ~PS_MARGINS;
875
876 assert(0 == p->ps->flags);
877 assert(p->ps->psmarg);
878 assert('\0' != p->ps->psmarg[0]);
879
880 /*
881 * Print header and initialise page state. Following this,
882 * stuff gets printed to the screen, so make sure we're sane.
883 */
884
885 if (TERMTYPE_PS == p->type) {
886 ps_printf(p, "%%!PS-Adobe-3.0\n");
887 ps_printf(p, "%%%%DocumentData: Clean7Bit\n");
888 ps_printf(p, "%%%%Orientation: Portrait\n");
889 ps_printf(p, "%%%%Pages: (atend)\n");
890 ps_printf(p, "%%%%PageOrder: Ascend\n");
891 ps_printf(p, "%%%%DocumentMedia: "
892 "Default %zu %zu 0 () ()\n",
893 (size_t)AFM2PNT(p, p->ps->width),
894 (size_t)AFM2PNT(p, p->ps->height));
895 ps_printf(p, "%%%%DocumentNeededResources: font");
896
897 for (i = 0; i < (int)TERMFONT__MAX; i++)
898 ps_printf(p, " %s", fonts[i].name);
899
900 ps_printf(p, "\n%%%%EndComments\n");
901 } else {
902 ps_printf(p, "%%PDF-1.1\n");
903 pdf_obj(p, 1);
904 ps_printf(p, "<<\n");
905 ps_printf(p, ">>\n");
906 ps_printf(p, "endobj\n");
907
908 for (i = 0; i < (int)TERMFONT__MAX; i++) {
909 pdf_obj(p, (size_t)i + 3);
910 ps_printf(p, "<<\n");
911 ps_printf(p, "/Type /Font\n");
912 ps_printf(p, "/Subtype /Type1\n");
913 ps_printf(p, "/Name /F%d\n", i);
914 ps_printf(p, "/BaseFont /%s\n", fonts[i].name);
915 ps_printf(p, ">>\n");
916 }
917 }
918
919 p->ps->pdfbody = (size_t)TERMFONT__MAX + 3;
920 p->ps->pscol = p->ps->left;
921 p->ps->psrow = p->ps->top;
922 p->ps->flags |= PS_NEWPAGE;
923 ps_setfont(p, TERMFONT_NONE);
924 }
925
926 static void
927 ps_pletter(struct termp *p, int c)
928 {
929 int f;
930
931 /*
932 * If we haven't opened a page context, then output that we're
933 * in a new page and make sure the font is correctly set.
934 */
935
936 if (PS_NEWPAGE & p->ps->flags) {
937 if (TERMTYPE_PS == p->type) {
938 ps_printf(p, "%%%%Page: %zu %zu\n",
939 p->ps->pages + 1, p->ps->pages + 1);
940 ps_printf(p, "/%s %zu selectfont\n",
941 fonts[(int)p->ps->lastf].name,
942 p->ps->scale);
943 } else {
944 pdf_obj(p, p->ps->pdfbody +
945 p->ps->pages * 4);
946 ps_printf(p, "<<\n");
947 ps_printf(p, "/Length %zu 0 R\n",
948 p->ps->pdfbody + 1 + p->ps->pages * 4);
949 ps_printf(p, ">>\nstream\n");
950 }
951 p->ps->pdflastpg = p->ps->pdfbytes;
952 p->ps->flags &= ~PS_NEWPAGE;
953 }
954
955 /*
956 * If we're not in a PostScript "word" context, then open one
957 * now at the current cursor.
958 */
959
960 if ( ! (PS_INLINE & p->ps->flags)) {
961 if (TERMTYPE_PS != p->type) {
962 ps_printf(p, "BT\n/F%d %zu Tf\n",
963 (int)p->ps->lastf, p->ps->scale);
964 ps_printf(p, "%.3f %.3f Td\n(",
965 AFM2PNT(p, p->ps->pscol),
966 AFM2PNT(p, p->ps->psrow));
967 } else
968 ps_printf(p, "%.3f %.3f moveto\n(",
969 AFM2PNT(p, p->ps->pscol),
970 AFM2PNT(p, p->ps->psrow));
971 p->ps->flags |= PS_INLINE;
972 }
973
974 assert( ! (PS_NEWPAGE & p->ps->flags));
975
976 /*
977 * We need to escape these characters as per the PostScript
978 * specification. We would also escape non-graphable characters
979 * (like tabs), but none of them would get to this point and
980 * it's superfluous to abort() on them.
981 */
982
983 switch (c) {
984 case '(':
985 case ')':
986 case '\\':
987 ps_putchar(p, '\\');
988 break;
989 default:
990 break;
991 }
992
993 /* Write the character and adjust where we are on the page. */
994
995 f = (int)p->ps->lastf;
996
997 if (c <= 32 || c - 32 >= MAXCHAR)
998 c = 32;
999
1000 ps_putchar(p, (char)c);
1001 c -= 32;
1002 p->ps->pscol += (size_t)fonts[f].gly[c].wx;
1003 }
1004
1005 static void
1006 ps_pclose(struct termp *p)
1007 {
1008
1009 /*
1010 * Spit out that we're exiting a word context (this is a
1011 * "partial close" because we don't check the last-char buffer
1012 * or anything).
1013 */
1014
1015 if ( ! (PS_INLINE & p->ps->flags))
1016 return;
1017
1018 if (TERMTYPE_PS != p->type) {
1019 ps_printf(p, ") Tj\nET\n");
1020 } else
1021 ps_printf(p, ") show\n");
1022
1023 p->ps->flags &= ~PS_INLINE;
1024 }
1025
1026 static void
1027 ps_fclose(struct termp *p)
1028 {
1029
1030 /*
1031 * Strong closure: if we have a last-char, spit it out after
1032 * checking that we're in the right font mode. This will of
1033 * course open a new scope, if applicable.
1034 *
1035 * Following this, close out any scope that's open.
1036 */
1037
1038 if (p->ps->last != '\0') {
1039 assert( ! (p->ps->flags & PS_BACKSP));
1040 if (p->ps->nextf != p->ps->lastf) {
1041 ps_pclose(p);
1042 ps_setfont(p, p->ps->nextf);
1043 }
1044 p->ps->nextf = TERMFONT_NONE;
1045 ps_pletter(p, p->ps->last);
1046 p->ps->last = '\0';
1047 }
1048
1049 if ( ! (PS_INLINE & p->ps->flags))
1050 return;
1051
1052 ps_pclose(p);
1053 }
1054
1055 static void
1056 ps_letter(struct termp *p, int arg)
1057 {
1058 size_t savecol, wx;
1059 char c;
1060
1061 c = arg >= 128 || arg <= 0 ? '?' : arg;
1062
1063 /*
1064 * When receiving a backspace, merely flag it.
1065 * We don't know yet whether it is
1066 * a font instruction or an overstrike.
1067 */
1068
1069 if (c == '\b') {
1070 assert(p->ps->last != '\0');
1071 assert( ! (p->ps->flags & PS_BACKSP));
1072 p->ps->flags |= PS_BACKSP;
1073 return;
1074 }
1075
1076 /*
1077 * Decode font instructions.
1078 */
1079
1080 if (p->ps->flags & PS_BACKSP) {
1081 if (p->ps->last == '_') {
1082 switch (p->ps->nextf) {
1083 case TERMFONT_BI:
1084 break;
1085 case TERMFONT_BOLD:
1086 p->ps->nextf = TERMFONT_BI;
1087 break;
1088 default:
1089 p->ps->nextf = TERMFONT_UNDER;
1090 }
1091 p->ps->last = c;
1092 p->ps->flags &= ~PS_BACKSP;
1093 return;
1094 }
1095 if (p->ps->last == c) {
1096 switch (p->ps->nextf) {
1097 case TERMFONT_BI:
1098 break;
1099 case TERMFONT_UNDER:
1100 p->ps->nextf = TERMFONT_BI;
1101 break;
1102 default:
1103 p->ps->nextf = TERMFONT_BOLD;
1104 }
1105 p->ps->flags &= ~PS_BACKSP;
1106 return;
1107 }
1108
1109 /*
1110 * This is not a font instruction, but rather
1111 * the next character. Prepare for overstrike.
1112 */
1113
1114 savecol = p->ps->pscol;
1115 } else
1116 savecol = SIZE_MAX;
1117
1118 /*
1119 * We found the next character, so the font instructions
1120 * for the previous one are complete.
1121 * Use them and print it.
1122 */
1123
1124 if (p->ps->last != '\0') {
1125 if (p->ps->nextf != p->ps->lastf) {
1126 ps_pclose(p);
1127 ps_setfont(p, p->ps->nextf);
1128 }
1129 p->ps->nextf = TERMFONT_NONE;
1130
1131 /*
1132 * For an overstrike, if a previous character
1133 * was wider, advance to center the new one.
1134 */
1135
1136 if (p->ps->pscolnext) {
1137 wx = fonts[p->ps->lastf].gly[(int)p->ps->last-32].wx;
1138 if (p->ps->pscol + wx < p->ps->pscolnext)
1139 p->ps->pscol = (p->ps->pscol +
1140 p->ps->pscolnext - wx) / 2;
1141 }
1142
1143 ps_pletter(p, p->ps->last);
1144
1145 /*
1146 * For an overstrike, if a previous character
1147 * was wider, advance to the end of the old one.
1148 */
1149
1150 if (p->ps->pscol < p->ps->pscolnext) {
1151 ps_pclose(p);
1152 p->ps->pscol = p->ps->pscolnext;
1153 }
1154 }
1155
1156 /*
1157 * Do not print the current character yet because font
1158 * instructions might follow; only remember it.
1159 * For the first character, nothing else is done.
1160 * The final character will get printed from ps_fclose().
1161 */
1162
1163 p->ps->last = c;
1164
1165 /*
1166 * For an overstrike, back up to the previous position.
1167 * If the previous character is wider than any it overstrikes,
1168 * remember the current position, because it might also be
1169 * wider than all that will overstrike it.
1170 */
1171
1172 if (savecol != SIZE_MAX) {
1173 if (p->ps->pscolnext < p->ps->pscol)
1174 p->ps->pscolnext = p->ps->pscol;
1175 ps_pclose(p);
1176 p->ps->pscol = savecol;
1177 p->ps->flags &= ~PS_BACKSP;
1178 } else
1179 p->ps->pscolnext = 0;
1180 }
1181
1182 static void
1183 ps_advance(struct termp *p, size_t len)
1184 {
1185
1186 /*
1187 * Advance some spaces. This can probably be made smarter,
1188 * i.e., to have multiple space-separated words in the same
1189 * scope, but this is easier: just close out the current scope
1190 * and readjust our column settings.
1191 */
1192
1193 ps_fclose(p);
1194 p->ps->pscol += len;
1195 }
1196
1197 static void
1198 ps_endline(struct termp *p)
1199 {
1200
1201 /* Close out any scopes we have open: we're at eoln. */
1202
1203 ps_fclose(p);
1204
1205 /*
1206 * If we're in the margin, don't try to recalculate our current
1207 * row. XXX: if the column tries to be fancy with multiple
1208 * lines, we'll do nasty stuff.
1209 */
1210
1211 if (PS_MARGINS & p->ps->flags)
1212 return;
1213
1214 /* Left-justify. */
1215
1216 p->ps->pscol = p->ps->left;
1217
1218 /* If we haven't printed anything, return. */
1219
1220 if (PS_NEWPAGE & p->ps->flags)
1221 return;
1222
1223 /*
1224 * Put us down a line. If we're at the page bottom, spit out a
1225 * showpage and restart our row.
1226 */
1227
1228 if (p->ps->psrow >= p->ps->lineheight + p->ps->bottom) {
1229 p->ps->psrow -= p->ps->lineheight;
1230 return;
1231 }
1232
1233 ps_closepage(p);
1234 }
1235
1236 static void
1237 ps_setfont(struct termp *p, enum termfont f)
1238 {
1239
1240 assert(f < TERMFONT__MAX);
1241 p->ps->lastf = f;
1242
1243 /*
1244 * If we're still at the top of the page, let the font-setting
1245 * be delayed until we actually have stuff to print.
1246 */
1247
1248 if (PS_NEWPAGE & p->ps->flags)
1249 return;
1250
1251 if (TERMTYPE_PS == p->type)
1252 ps_printf(p, "/%s %zu selectfont\n",
1253 fonts[(int)f].name, p->ps->scale);
1254 else
1255 ps_printf(p, "/F%d %zu Tf\n",
1256 (int)f, p->ps->scale);
1257 }
1258
1259 static size_t
1260 ps_width(const struct termp *p, int c)
1261 {
1262
1263 if (c <= 32 || c - 32 >= MAXCHAR)
1264 c = 0;
1265 else
1266 c -= 32;
1267
1268 return (size_t)fonts[(int)TERMFONT_NONE].gly[c].wx;
1269 }
1270
1271 static int
1272 ps_hspan(const struct termp *p, const struct roffsu *su)
1273 {
1274 double r;
1275
1276 /*
1277 * All of these measurements are derived by converting from the
1278 * native measurement to AFM units.
1279 */
1280 switch (su->unit) {
1281 case SCALE_BU:
1282 /*
1283 * Traditionally, the default unit is fixed to the
1284 * output media. So this would refer to the point. In
1285 * mandoc(1), however, we stick to the default terminal
1286 * scaling unit so that output is the same regardless
1287 * the media.
1288 */
1289 r = PNT2AFM(p, su->scale * 72.0 / 240.0);
1290 break;
1291 case SCALE_CM:
1292 r = PNT2AFM(p, su->scale * 72.0 / 2.54);
1293 break;
1294 case SCALE_EM:
1295 r = su->scale *
1296 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx;
1297 break;
1298 case SCALE_EN:
1299 r = su->scale *
1300 fonts[(int)TERMFONT_NONE].gly[110 - 32].wx;
1301 break;
1302 case SCALE_IN:
1303 r = PNT2AFM(p, su->scale * 72.0);
1304 break;
1305 case SCALE_MM:
1306 r = su->scale *
1307 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx / 100.0;
1308 break;
1309 case SCALE_PC:
1310 r = PNT2AFM(p, su->scale * 12.0);
1311 break;
1312 case SCALE_PT:
1313 r = PNT2AFM(p, su->scale * 1.0);
1314 break;
1315 case SCALE_VS:
1316 r = su->scale * p->ps->lineheight;
1317 break;
1318 default:
1319 r = su->scale;
1320 break;
1321 }
1322
1323 return r * 24.0;
1324 }
1325
1326 static void
1327 ps_growbuf(struct termp *p, size_t sz)
1328 {
1329 if (p->ps->psmargcur + sz <= p->ps->psmargsz)
1330 return;
1331
1332 if (sz < PS_BUFSLOP)
1333 sz = PS_BUFSLOP;
1334
1335 p->ps->psmargsz += sz;
1336 p->ps->psmarg = mandoc_realloc(p->ps->psmarg, p->ps->psmargsz);
1337 }
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