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Prevent negative arguments to the .ll request from causing integer
[mandoc.git] / term_ps.c
1 /* $Id: term_ps.c,v 1.69 2014/11/20 13:56:20 schwarze Exp $ */
2 /*
3 * Copyright (c) 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
4 * Copyright (c) 2014 Ingo Schwarze <schwarze@openbsd.org>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18 #include "config.h"
19
20 #include <sys/types.h>
21
22 #include <assert.h>
23 #include <stdarg.h>
24 #include <stdint.h>
25 #include <stdio.h>
26 #include <stdlib.h>
27 #include <string.h>
28 #include <unistd.h>
29
30 #include "mandoc.h"
31 #include "mandoc_aux.h"
32 #include "out.h"
33 #include "main.h"
34 #include "term.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 psrow; /* visible row (AFM units) */
65 char *psmarg; /* margin buf */
66 size_t psmargsz; /* margin buf size */
67 size_t psmargcur; /* cur index in margin buf */
68 char last; /* last non-backspace seen */
69 enum termfont lastf; /* last set font */
70 enum termfont nextf; /* building next font here */
71 size_t scale; /* font scaling factor */
72 size_t pages; /* number of pages shown */
73 size_t lineheight; /* line height (AFM units) */
74 size_t top; /* body top (AFM units) */
75 size_t bottom; /* body bottom (AFM units) */
76 size_t height; /* page height (AFM units */
77 size_t width; /* page width (AFM units) */
78 size_t lastwidth; /* page width before last ll */
79 size_t left; /* body left (AFM units) */
80 size_t header; /* header pos (AFM units) */
81 size_t footer; /* footer pos (AFM units) */
82 size_t pdfbytes; /* current output byte */
83 size_t pdflastpg; /* byte of last page mark */
84 size_t pdfbody; /* start of body object */
85 size_t *pdfobjs; /* table of object offsets */
86 size_t pdfobjsz; /* size of pdfobjs */
87 };
88
89 static double ps_hspan(const struct termp *,
90 const struct roffsu *);
91 static size_t ps_width(const struct termp *, int);
92 static void ps_advance(struct termp *, size_t);
93 static void ps_begin(struct termp *);
94 static void ps_closepage(struct termp *);
95 static void ps_end(struct termp *);
96 static void ps_endline(struct termp *);
97 static void ps_fclose(struct termp *);
98 static void ps_growbuf(struct termp *, size_t);
99 static void ps_letter(struct termp *, int);
100 static void ps_pclose(struct termp *);
101 static void ps_pletter(struct termp *, int);
102 #if __GNUC__ - 0 >= 4
103 __attribute__((__format__ (__printf__, 2, 3)))
104 #endif
105 static void ps_printf(struct termp *, const char *, ...);
106 static void ps_putchar(struct termp *, char);
107 static void ps_setfont(struct termp *, enum termfont);
108 static void ps_setwidth(struct termp *, int, size_t);
109 static struct termp *pspdf_alloc(const struct mchars *, char *);
110 static void pdf_obj(struct termp *, size_t);
111
112 /*
113 * We define, for the time being, three fonts: bold, oblique/italic, and
114 * normal (roman). The following table hard-codes the font metrics for
115 * ASCII, i.e., 32--127.
116 */
117
118 static const struct font fonts[TERMFONT__MAX] = {
119 { "Times-Roman", {
120 { 250 },
121 { 333 },
122 { 408 },
123 { 500 },
124 { 500 },
125 { 833 },
126 { 778 },
127 { 333 },
128 { 333 },
129 { 333 },
130 { 500 },
131 { 564 },
132 { 250 },
133 { 333 },
134 { 250 },
135 { 278 },
136 { 500 },
137 { 500 },
138 { 500 },
139 { 500 },
140 { 500 },
141 { 500 },
142 { 500 },
143 { 500 },
144 { 500 },
145 { 500 },
146 { 278 },
147 { 278 },
148 { 564 },
149 { 564 },
150 { 564 },
151 { 444 },
152 { 921 },
153 { 722 },
154 { 667 },
155 { 667 },
156 { 722 },
157 { 611 },
158 { 556 },
159 { 722 },
160 { 722 },
161 { 333 },
162 { 389 },
163 { 722 },
164 { 611 },
165 { 889 },
166 { 722 },
167 { 722 },
168 { 556 },
169 { 722 },
170 { 667 },
171 { 556 },
172 { 611 },
173 { 722 },
174 { 722 },
175 { 944 },
176 { 722 },
177 { 722 },
178 { 611 },
179 { 333 },
180 { 278 },
181 { 333 },
182 { 469 },
183 { 500 },
184 { 333 },
185 { 444 },
186 { 500 },
187 { 444 },
188 { 500},
189 { 444},
190 { 333},
191 { 500},
192 { 500},
193 { 278},
194 { 278},
195 { 500},
196 { 278},
197 { 778},
198 { 500},
199 { 500},
200 { 500},
201 { 500},
202 { 333},
203 { 389},
204 { 278},
205 { 500},
206 { 500},
207 { 722},
208 { 500},
209 { 500},
210 { 444},
211 { 480},
212 { 200},
213 { 480},
214 { 541},
215 } },
216 { "Times-Bold", {
217 { 250 },
218 { 333 },
219 { 555 },
220 { 500 },
221 { 500 },
222 { 1000 },
223 { 833 },
224 { 333 },
225 { 333 },
226 { 333 },
227 { 500 },
228 { 570 },
229 { 250 },
230 { 333 },
231 { 250 },
232 { 278 },
233 { 500 },
234 { 500 },
235 { 500 },
236 { 500 },
237 { 500 },
238 { 500 },
239 { 500 },
240 { 500 },
241 { 500 },
242 { 500 },
243 { 333 },
244 { 333 },
245 { 570 },
246 { 570 },
247 { 570 },
248 { 500 },
249 { 930 },
250 { 722 },
251 { 667 },
252 { 722 },
253 { 722 },
254 { 667 },
255 { 611 },
256 { 778 },
257 { 778 },
258 { 389 },
259 { 500 },
260 { 778 },
261 { 667 },
262 { 944 },
263 { 722 },
264 { 778 },
265 { 611 },
266 { 778 },
267 { 722 },
268 { 556 },
269 { 667 },
270 { 722 },
271 { 722 },
272 { 1000 },
273 { 722 },
274 { 722 },
275 { 667 },
276 { 333 },
277 { 278 },
278 { 333 },
279 { 581 },
280 { 500 },
281 { 333 },
282 { 500 },
283 { 556 },
284 { 444 },
285 { 556 },
286 { 444 },
287 { 333 },
288 { 500 },
289 { 556 },
290 { 278 },
291 { 333 },
292 { 556 },
293 { 278 },
294 { 833 },
295 { 556 },
296 { 500 },
297 { 556 },
298 { 556 },
299 { 444 },
300 { 389 },
301 { 333 },
302 { 556 },
303 { 500 },
304 { 722 },
305 { 500 },
306 { 500 },
307 { 444 },
308 { 394 },
309 { 220 },
310 { 394 },
311 { 520 },
312 } },
313 { "Times-Italic", {
314 { 250 },
315 { 333 },
316 { 420 },
317 { 500 },
318 { 500 },
319 { 833 },
320 { 778 },
321 { 333 },
322 { 333 },
323 { 333 },
324 { 500 },
325 { 675 },
326 { 250 },
327 { 333 },
328 { 250 },
329 { 278 },
330 { 500 },
331 { 500 },
332 { 500 },
333 { 500 },
334 { 500 },
335 { 500 },
336 { 500 },
337 { 500 },
338 { 500 },
339 { 500 },
340 { 333 },
341 { 333 },
342 { 675 },
343 { 675 },
344 { 675 },
345 { 500 },
346 { 920 },
347 { 611 },
348 { 611 },
349 { 667 },
350 { 722 },
351 { 611 },
352 { 611 },
353 { 722 },
354 { 722 },
355 { 333 },
356 { 444 },
357 { 667 },
358 { 556 },
359 { 833 },
360 { 667 },
361 { 722 },
362 { 611 },
363 { 722 },
364 { 611 },
365 { 500 },
366 { 556 },
367 { 722 },
368 { 611 },
369 { 833 },
370 { 611 },
371 { 556 },
372 { 556 },
373 { 389 },
374 { 278 },
375 { 389 },
376 { 422 },
377 { 500 },
378 { 333 },
379 { 500 },
380 { 500 },
381 { 444 },
382 { 500 },
383 { 444 },
384 { 278 },
385 { 500 },
386 { 500 },
387 { 278 },
388 { 278 },
389 { 444 },
390 { 278 },
391 { 722 },
392 { 500 },
393 { 500 },
394 { 500 },
395 { 500 },
396 { 389 },
397 { 389 },
398 { 278 },
399 { 500 },
400 { 444 },
401 { 667 },
402 { 444 },
403 { 444 },
404 { 389 },
405 { 400 },
406 { 275 },
407 { 400 },
408 { 541 },
409 } },
410 { "Times-BoldItalic", {
411 { 250 },
412 { 389 },
413 { 555 },
414 { 500 },
415 { 500 },
416 { 833 },
417 { 778 },
418 { 333 },
419 { 333 },
420 { 333 },
421 { 500 },
422 { 570 },
423 { 250 },
424 { 333 },
425 { 250 },
426 { 278 },
427 { 500 },
428 { 500 },
429 { 500 },
430 { 500 },
431 { 500 },
432 { 500 },
433 { 500 },
434 { 500 },
435 { 500 },
436 { 500 },
437 { 333 },
438 { 333 },
439 { 570 },
440 { 570 },
441 { 570 },
442 { 500 },
443 { 832 },
444 { 667 },
445 { 667 },
446 { 667 },
447 { 722 },
448 { 667 },
449 { 667 },
450 { 722 },
451 { 778 },
452 { 389 },
453 { 500 },
454 { 667 },
455 { 611 },
456 { 889 },
457 { 722 },
458 { 722 },
459 { 611 },
460 { 722 },
461 { 667 },
462 { 556 },
463 { 611 },
464 { 722 },
465 { 667 },
466 { 889 },
467 { 667 },
468 { 611 },
469 { 611 },
470 { 333 },
471 { 278 },
472 { 333 },
473 { 570 },
474 { 500 },
475 { 333 },
476 { 500 },
477 { 500 },
478 { 444 },
479 { 500 },
480 { 444 },
481 { 333 },
482 { 500 },
483 { 556 },
484 { 278 },
485 { 278 },
486 { 500 },
487 { 278 },
488 { 778 },
489 { 556 },
490 { 500 },
491 { 500 },
492 { 500 },
493 { 389 },
494 { 389 },
495 { 278 },
496 { 556 },
497 { 444 },
498 { 667 },
499 { 500 },
500 { 444 },
501 { 389 },
502 { 348 },
503 { 220 },
504 { 348 },
505 { 570 },
506 } },
507 };
508
509 void *
510 pdf_alloc(const struct mchars *mchars, char *outopts)
511 {
512 struct termp *p;
513
514 if (NULL != (p = pspdf_alloc(mchars, outopts)))
515 p->type = TERMTYPE_PDF;
516
517 return(p);
518 }
519
520 void *
521 ps_alloc(const struct mchars *mchars, char *outopts)
522 {
523 struct termp *p;
524
525 if (NULL != (p = pspdf_alloc(mchars, outopts)))
526 p->type = TERMTYPE_PS;
527
528 return(p);
529 }
530
531 static struct termp *
532 pspdf_alloc(const struct mchars *mchars, char *outopts)
533 {
534 struct termp *p;
535 unsigned int pagex, pagey;
536 size_t marginx, marginy, lineheight;
537 const char *toks[2];
538 const char *pp;
539 char *v;
540
541 p = mandoc_calloc(1, sizeof(struct termp));
542 p->symtab = mchars;
543 p->enc = TERMENC_ASCII;
544 p->ps = mandoc_calloc(1, sizeof(struct termp_ps));
545
546 p->advance = ps_advance;
547 p->begin = ps_begin;
548 p->end = ps_end;
549 p->endline = ps_endline;
550 p->hspan = ps_hspan;
551 p->letter = ps_letter;
552 p->setwidth = ps_setwidth;
553 p->width = ps_width;
554
555 toks[0] = "paper";
556 toks[1] = NULL;
557
558 pp = NULL;
559
560 while (outopts && *outopts)
561 switch (getsubopt(&outopts, UNCONST(toks), &v)) {
562 case 0:
563 pp = v;
564 break;
565 default:
566 break;
567 }
568
569 /* Default to US letter (millimetres). */
570
571 pagex = 216;
572 pagey = 279;
573
574 /*
575 * The ISO-269 paper sizes can be calculated automatically, but
576 * it would require bringing in -lm for pow() and I'd rather not
577 * do that. So just do it the easy way for now. Since this
578 * only happens once, I'm not terribly concerned.
579 */
580
581 if (pp && strcasecmp(pp, "letter")) {
582 if (0 == strcasecmp(pp, "a3")) {
583 pagex = 297;
584 pagey = 420;
585 } else if (0 == strcasecmp(pp, "a4")) {
586 pagex = 210;
587 pagey = 297;
588 } else if (0 == strcasecmp(pp, "a5")) {
589 pagex = 148;
590 pagey = 210;
591 } else if (0 == strcasecmp(pp, "legal")) {
592 pagex = 216;
593 pagey = 356;
594 } else if (2 != sscanf(pp, "%ux%u", &pagex, &pagey))
595 fprintf(stderr, "%s: Unknown paper\n", pp);
596 }
597
598 /*
599 * This MUST be defined before any PNT2AFM or AFM2PNT
600 * calculations occur.
601 */
602
603 p->ps->scale = 11;
604
605 /* Remember millimetres -> AFM units. */
606
607 pagex = PNT2AFM(p, ((double)pagex * 2.834));
608 pagey = PNT2AFM(p, ((double)pagey * 2.834));
609
610 /* Margins are 1/9 the page x and y. */
611
612 marginx = (size_t)((double)pagex / 9.0);
613 marginy = (size_t)((double)pagey / 9.0);
614
615 /* Line-height is 1.4em. */
616
617 lineheight = PNT2AFM(p, ((double)p->ps->scale * 1.4));
618
619 p->ps->width = p->ps->lastwidth = (size_t)pagex;
620 p->ps->height = (size_t)pagey;
621 p->ps->header = pagey - (marginy / 2) - (lineheight / 2);
622 p->ps->top = pagey - marginy;
623 p->ps->footer = (marginy / 2) - (lineheight / 2);
624 p->ps->bottom = marginy;
625 p->ps->left = marginx;
626 p->ps->lineheight = lineheight;
627
628 p->defrmargin = pagex - (marginx * 2);
629 return(p);
630 }
631
632 static void
633 ps_setwidth(struct termp *p, int iop, size_t width)
634 {
635 size_t lastwidth;
636
637 lastwidth = p->ps->width;
638 if (iop > 0)
639 p->ps->width += width;
640 else if (iop == 0)
641 p->ps->width = width ? width : p->ps->lastwidth;
642 else if (p->ps->width > width)
643 p->ps->width -= width;
644 else
645 p->ps->width = 0;
646 p->ps->lastwidth = lastwidth;
647 }
648
649 void
650 pspdf_free(void *arg)
651 {
652 struct termp *p;
653
654 p = (struct termp *)arg;
655
656 if (p->ps->psmarg)
657 free(p->ps->psmarg);
658 if (p->ps->pdfobjs)
659 free(p->ps->pdfobjs);
660
661 free(p->ps);
662 term_free(p);
663 }
664
665 static void
666 ps_printf(struct termp *p, const char *fmt, ...)
667 {
668 va_list ap;
669 int pos, len;
670
671 va_start(ap, fmt);
672
673 /*
674 * If we're running in regular mode, then pipe directly into
675 * vprintf(). If we're processing margins, then push the data
676 * into our growable margin buffer.
677 */
678
679 if ( ! (PS_MARGINS & p->ps->flags)) {
680 len = vprintf(fmt, ap);
681 va_end(ap);
682 p->ps->pdfbytes += len < 0 ? 0 : (size_t)len;
683 return;
684 }
685
686 /*
687 * XXX: I assume that the in-margin print won't exceed
688 * PS_BUFSLOP (128 bytes), which is reasonable but still an
689 * assumption that will cause pukeage if it's not the case.
690 */
691
692 ps_growbuf(p, PS_BUFSLOP);
693
694 pos = (int)p->ps->psmargcur;
695 vsnprintf(&p->ps->psmarg[pos], PS_BUFSLOP, fmt, ap);
696
697 va_end(ap);
698
699 p->ps->psmargcur = strlen(p->ps->psmarg);
700 }
701
702 static void
703 ps_putchar(struct termp *p, char c)
704 {
705 int pos;
706
707 /* See ps_printf(). */
708
709 if ( ! (PS_MARGINS & p->ps->flags)) {
710 putchar(c);
711 p->ps->pdfbytes++;
712 return;
713 }
714
715 ps_growbuf(p, 2);
716
717 pos = (int)p->ps->psmargcur++;
718 p->ps->psmarg[pos++] = c;
719 p->ps->psmarg[pos] = '\0';
720 }
721
722 static void
723 pdf_obj(struct termp *p, size_t obj)
724 {
725
726 assert(obj > 0);
727
728 if ((obj - 1) >= p->ps->pdfobjsz) {
729 p->ps->pdfobjsz = obj + 128;
730 p->ps->pdfobjs = mandoc_reallocarray(p->ps->pdfobjs,
731 p->ps->pdfobjsz, sizeof(size_t));
732 }
733
734 p->ps->pdfobjs[(int)obj - 1] = p->ps->pdfbytes;
735 ps_printf(p, "%zu 0 obj\n", obj);
736 }
737
738 static void
739 ps_closepage(struct termp *p)
740 {
741 int i;
742 size_t len, base;
743
744 /*
745 * Close out a page that we've already flushed to output. In
746 * PostScript, we simply note that the page must be showed. In
747 * PDF, we must now create the Length, Resource, and Page node
748 * for the page contents.
749 */
750
751 assert(p->ps->psmarg && p->ps->psmarg[0]);
752 ps_printf(p, "%s", p->ps->psmarg);
753
754 if (TERMTYPE_PS != p->type) {
755 ps_printf(p, "ET\n");
756
757 len = p->ps->pdfbytes - p->ps->pdflastpg;
758 base = p->ps->pages * 4 + p->ps->pdfbody;
759
760 ps_printf(p, "endstream\nendobj\n");
761
762 /* Length of content. */
763 pdf_obj(p, base + 1);
764 ps_printf(p, "%zu\nendobj\n", len);
765
766 /* Resource for content. */
767 pdf_obj(p, base + 2);
768 ps_printf(p, "<<\n/ProcSet [/PDF /Text]\n");
769 ps_printf(p, "/Font <<\n");
770 for (i = 0; i < (int)TERMFONT__MAX; i++)
771 ps_printf(p, "/F%d %d 0 R\n", i, 3 + i);
772 ps_printf(p, ">>\n>>\n");
773
774 /* Page node. */
775 pdf_obj(p, base + 3);
776 ps_printf(p, "<<\n");
777 ps_printf(p, "/Type /Page\n");
778 ps_printf(p, "/Parent 2 0 R\n");
779 ps_printf(p, "/Resources %zu 0 R\n", base + 2);
780 ps_printf(p, "/Contents %zu 0 R\n", base);
781 ps_printf(p, ">>\nendobj\n");
782 } else
783 ps_printf(p, "showpage\n");
784
785 p->ps->pages++;
786 p->ps->psrow = p->ps->top;
787 assert( ! (PS_NEWPAGE & p->ps->flags));
788 p->ps->flags |= PS_NEWPAGE;
789 }
790
791 static void
792 ps_end(struct termp *p)
793 {
794 size_t i, xref, base;
795
796 /*
797 * At the end of the file, do one last showpage. This is the
798 * same behaviour as groff(1) and works for multiple pages as
799 * well as just one.
800 */
801
802 if ( ! (PS_NEWPAGE & p->ps->flags)) {
803 assert(0 == p->ps->flags);
804 assert('\0' == p->ps->last);
805 ps_closepage(p);
806 }
807
808 if (TERMTYPE_PS == p->type) {
809 ps_printf(p, "%%%%Trailer\n");
810 ps_printf(p, "%%%%Pages: %zu\n", p->ps->pages);
811 ps_printf(p, "%%%%EOF\n");
812 return;
813 }
814
815 pdf_obj(p, 2);
816 ps_printf(p, "<<\n/Type /Pages\n");
817 ps_printf(p, "/MediaBox [0 0 %zu %zu]\n",
818 (size_t)AFM2PNT(p, p->ps->width),
819 (size_t)AFM2PNT(p, p->ps->height));
820
821 ps_printf(p, "/Count %zu\n", p->ps->pages);
822 ps_printf(p, "/Kids [");
823
824 for (i = 0; i < p->ps->pages; i++)
825 ps_printf(p, " %zu 0 R", i * 4 + p->ps->pdfbody + 3);
826
827 base = (p->ps->pages - 1) * 4 + p->ps->pdfbody + 4;
828
829 ps_printf(p, "]\n>>\nendobj\n");
830 pdf_obj(p, base);
831 ps_printf(p, "<<\n");
832 ps_printf(p, "/Type /Catalog\n");
833 ps_printf(p, "/Pages 2 0 R\n");
834 ps_printf(p, ">>\n");
835 xref = p->ps->pdfbytes;
836 ps_printf(p, "xref\n");
837 ps_printf(p, "0 %zu\n", base + 1);
838 ps_printf(p, "0000000000 65535 f \n");
839
840 for (i = 0; i < base; i++)
841 ps_printf(p, "%.10zu 00000 n \n",
842 p->ps->pdfobjs[(int)i]);
843
844 ps_printf(p, "trailer\n");
845 ps_printf(p, "<<\n");
846 ps_printf(p, "/Size %zu\n", base + 1);
847 ps_printf(p, "/Root %zu 0 R\n", base);
848 ps_printf(p, "/Info 1 0 R\n");
849 ps_printf(p, ">>\n");
850 ps_printf(p, "startxref\n");
851 ps_printf(p, "%zu\n", xref);
852 ps_printf(p, "%%%%EOF\n");
853 }
854
855 static void
856 ps_begin(struct termp *p)
857 {
858 int i;
859
860 /*
861 * Print margins into margin buffer. Nothing gets output to the
862 * screen yet, so we don't need to initialise the primary state.
863 */
864
865 if (p->ps->psmarg) {
866 assert(p->ps->psmargsz);
867 p->ps->psmarg[0] = '\0';
868 }
869
870 /*p->ps->pdfbytes = 0;*/
871 p->ps->psmargcur = 0;
872 p->ps->flags = PS_MARGINS;
873 p->ps->pscol = p->ps->left;
874 p->ps->psrow = p->ps->header;
875
876 ps_setfont(p, TERMFONT_NONE);
877
878 (*p->headf)(p, p->argf);
879 (*p->endline)(p);
880
881 p->ps->pscol = p->ps->left;
882 p->ps->psrow = p->ps->footer;
883
884 (*p->footf)(p, p->argf);
885 (*p->endline)(p);
886
887 p->ps->flags &= ~PS_MARGINS;
888
889 assert(0 == p->ps->flags);
890 assert(p->ps->psmarg);
891 assert('\0' != p->ps->psmarg[0]);
892
893 /*
894 * Print header and initialise page state. Following this,
895 * stuff gets printed to the screen, so make sure we're sane.
896 */
897
898 if (TERMTYPE_PS == p->type) {
899 ps_printf(p, "%%!PS-Adobe-3.0\n");
900 ps_printf(p, "%%%%DocumentData: Clean7Bit\n");
901 ps_printf(p, "%%%%Orientation: Portrait\n");
902 ps_printf(p, "%%%%Pages: (atend)\n");
903 ps_printf(p, "%%%%PageOrder: Ascend\n");
904 ps_printf(p, "%%%%DocumentMedia: "
905 "Default %zu %zu 0 () ()\n",
906 (size_t)AFM2PNT(p, p->ps->width),
907 (size_t)AFM2PNT(p, p->ps->height));
908 ps_printf(p, "%%%%DocumentNeededResources: font");
909
910 for (i = 0; i < (int)TERMFONT__MAX; i++)
911 ps_printf(p, " %s", fonts[i].name);
912
913 ps_printf(p, "\n%%%%EndComments\n");
914 } else {
915 ps_printf(p, "%%PDF-1.1\n");
916 pdf_obj(p, 1);
917 ps_printf(p, "<<\n");
918 ps_printf(p, ">>\n");
919 ps_printf(p, "endobj\n");
920
921 for (i = 0; i < (int)TERMFONT__MAX; i++) {
922 pdf_obj(p, (size_t)i + 3);
923 ps_printf(p, "<<\n");
924 ps_printf(p, "/Type /Font\n");
925 ps_printf(p, "/Subtype /Type1\n");
926 ps_printf(p, "/Name /F%d\n", i);
927 ps_printf(p, "/BaseFont /%s\n", fonts[i].name);
928 ps_printf(p, ">>\n");
929 }
930 }
931
932 p->ps->pdfbody = (size_t)TERMFONT__MAX + 3;
933 p->ps->pscol = p->ps->left;
934 p->ps->psrow = p->ps->top;
935 p->ps->flags |= PS_NEWPAGE;
936 ps_setfont(p, TERMFONT_NONE);
937 }
938
939 static void
940 ps_pletter(struct termp *p, int c)
941 {
942 int f;
943
944 /*
945 * If we haven't opened a page context, then output that we're
946 * in a new page and make sure the font is correctly set.
947 */
948
949 if (PS_NEWPAGE & p->ps->flags) {
950 if (TERMTYPE_PS == p->type) {
951 ps_printf(p, "%%%%Page: %zu %zu\n",
952 p->ps->pages + 1, p->ps->pages + 1);
953 ps_printf(p, "/%s %zu selectfont\n",
954 fonts[(int)p->ps->lastf].name,
955 p->ps->scale);
956 } else {
957 pdf_obj(p, p->ps->pdfbody +
958 p->ps->pages * 4);
959 ps_printf(p, "<<\n");
960 ps_printf(p, "/Length %zu 0 R\n",
961 p->ps->pdfbody + 1 + p->ps->pages * 4);
962 ps_printf(p, ">>\nstream\n");
963 }
964 p->ps->pdflastpg = p->ps->pdfbytes;
965 p->ps->flags &= ~PS_NEWPAGE;
966 }
967
968 /*
969 * If we're not in a PostScript "word" context, then open one
970 * now at the current cursor.
971 */
972
973 if ( ! (PS_INLINE & p->ps->flags)) {
974 if (TERMTYPE_PS != p->type) {
975 ps_printf(p, "BT\n/F%d %zu Tf\n",
976 (int)p->ps->lastf, p->ps->scale);
977 ps_printf(p, "%.3f %.3f Td\n(",
978 AFM2PNT(p, p->ps->pscol),
979 AFM2PNT(p, p->ps->psrow));
980 } else
981 ps_printf(p, "%.3f %.3f moveto\n(",
982 AFM2PNT(p, p->ps->pscol),
983 AFM2PNT(p, p->ps->psrow));
984 p->ps->flags |= PS_INLINE;
985 }
986
987 assert( ! (PS_NEWPAGE & p->ps->flags));
988
989 /*
990 * We need to escape these characters as per the PostScript
991 * specification. We would also escape non-graphable characters
992 * (like tabs), but none of them would get to this point and
993 * it's superfluous to abort() on them.
994 */
995
996 switch (c) {
997 case '(':
998 /* FALLTHROUGH */
999 case ')':
1000 /* FALLTHROUGH */
1001 case '\\':
1002 ps_putchar(p, '\\');
1003 break;
1004 default:
1005 break;
1006 }
1007
1008 /* Write the character and adjust where we are on the page. */
1009
1010 f = (int)p->ps->lastf;
1011
1012 if (c <= 32 || c - 32 >= MAXCHAR)
1013 c = 32;
1014
1015 ps_putchar(p, (char)c);
1016 c -= 32;
1017 p->ps->pscol += (size_t)fonts[f].gly[c].wx;
1018 }
1019
1020 static void
1021 ps_pclose(struct termp *p)
1022 {
1023
1024 /*
1025 * Spit out that we're exiting a word context (this is a
1026 * "partial close" because we don't check the last-char buffer
1027 * or anything).
1028 */
1029
1030 if ( ! (PS_INLINE & p->ps->flags))
1031 return;
1032
1033 if (TERMTYPE_PS != p->type) {
1034 ps_printf(p, ") Tj\nET\n");
1035 } else
1036 ps_printf(p, ") show\n");
1037
1038 p->ps->flags &= ~PS_INLINE;
1039 }
1040
1041 static void
1042 ps_fclose(struct termp *p)
1043 {
1044
1045 /*
1046 * Strong closure: if we have a last-char, spit it out after
1047 * checking that we're in the right font mode. This will of
1048 * course open a new scope, if applicable.
1049 *
1050 * Following this, close out any scope that's open.
1051 */
1052
1053 if (p->ps->last != '\0') {
1054 assert( ! (p->ps->flags & PS_BACKSP));
1055 if (p->ps->nextf != p->ps->lastf) {
1056 ps_pclose(p);
1057 ps_setfont(p, p->ps->nextf);
1058 }
1059 p->ps->nextf = TERMFONT_NONE;
1060 ps_pletter(p, p->ps->last);
1061 p->ps->last = '\0';
1062 }
1063
1064 if ( ! (PS_INLINE & p->ps->flags))
1065 return;
1066
1067 ps_pclose(p);
1068 }
1069
1070 static void
1071 ps_letter(struct termp *p, int arg)
1072 {
1073 size_t savecol;
1074 char c;
1075
1076 c = arg >= 128 || arg <= 0 ? '?' : arg;
1077
1078 /*
1079 * When receiving a backspace, merely flag it.
1080 * We don't know yet whether it is
1081 * a font instruction or an overstrike.
1082 */
1083
1084 if (c == '\b') {
1085 assert(p->ps->last != '\0');
1086 assert( ! (p->ps->flags & PS_BACKSP));
1087 p->ps->flags |= PS_BACKSP;
1088 return;
1089 }
1090
1091 /*
1092 * Decode font instructions.
1093 */
1094
1095 if (p->ps->flags & PS_BACKSP) {
1096 if (p->ps->last == '_') {
1097 switch (p->ps->nextf) {
1098 case TERMFONT_BI:
1099 break;
1100 case TERMFONT_BOLD:
1101 p->ps->nextf = TERMFONT_BI;
1102 break;
1103 default:
1104 p->ps->nextf = TERMFONT_UNDER;
1105 }
1106 p->ps->last = c;
1107 p->ps->flags &= ~PS_BACKSP;
1108 return;
1109 }
1110 if (p->ps->last == c) {
1111 switch (p->ps->nextf) {
1112 case TERMFONT_BI:
1113 break;
1114 case TERMFONT_UNDER:
1115 p->ps->nextf = TERMFONT_BI;
1116 break;
1117 default:
1118 p->ps->nextf = TERMFONT_BOLD;
1119 }
1120 p->ps->flags &= ~PS_BACKSP;
1121 return;
1122 }
1123
1124 /*
1125 * This is not a font instruction, but rather
1126 * the next character. Prepare for overstrike.
1127 */
1128
1129 savecol = p->ps->pscol;
1130 } else
1131 savecol = SIZE_MAX;
1132
1133 /*
1134 * We found the next character, so the font instructions
1135 * for the previous one are complete.
1136 * Use them and print it.
1137 */
1138
1139 if (p->ps->last != '\0') {
1140 if (p->ps->nextf != p->ps->lastf) {
1141 ps_pclose(p);
1142 ps_setfont(p, p->ps->nextf);
1143 }
1144 p->ps->nextf = TERMFONT_NONE;
1145 ps_pletter(p, p->ps->last);
1146 }
1147
1148 /*
1149 * Do not print the current character yet because font
1150 * instructions might follow; only remember it.
1151 * For the first character, nothing else is done.
1152 * The final character will get printed from ps_fclose().
1153 */
1154
1155 p->ps->last = c;
1156
1157 /*
1158 * For an overstrike, back up to the previous position.
1159 */
1160
1161 if (savecol != SIZE_MAX) {
1162 ps_pclose(p);
1163 p->ps->pscol = savecol;
1164 p->ps->flags &= ~PS_BACKSP;
1165 }
1166 }
1167
1168 static void
1169 ps_advance(struct termp *p, size_t len)
1170 {
1171
1172 /*
1173 * Advance some spaces. This can probably be made smarter,
1174 * i.e., to have multiple space-separated words in the same
1175 * scope, but this is easier: just close out the current scope
1176 * and readjust our column settings.
1177 */
1178
1179 ps_fclose(p);
1180 p->ps->pscol += len;
1181 }
1182
1183 static void
1184 ps_endline(struct termp *p)
1185 {
1186
1187 /* Close out any scopes we have open: we're at eoln. */
1188
1189 ps_fclose(p);
1190
1191 /*
1192 * If we're in the margin, don't try to recalculate our current
1193 * row. XXX: if the column tries to be fancy with multiple
1194 * lines, we'll do nasty stuff.
1195 */
1196
1197 if (PS_MARGINS & p->ps->flags)
1198 return;
1199
1200 /* Left-justify. */
1201
1202 p->ps->pscol = p->ps->left;
1203
1204 /* If we haven't printed anything, return. */
1205
1206 if (PS_NEWPAGE & p->ps->flags)
1207 return;
1208
1209 /*
1210 * Put us down a line. If we're at the page bottom, spit out a
1211 * showpage and restart our row.
1212 */
1213
1214 if (p->ps->psrow >= p->ps->lineheight + p->ps->bottom) {
1215 p->ps->psrow -= p->ps->lineheight;
1216 return;
1217 }
1218
1219 ps_closepage(p);
1220 }
1221
1222 static void
1223 ps_setfont(struct termp *p, enum termfont f)
1224 {
1225
1226 assert(f < TERMFONT__MAX);
1227 p->ps->lastf = f;
1228
1229 /*
1230 * If we're still at the top of the page, let the font-setting
1231 * be delayed until we actually have stuff to print.
1232 */
1233
1234 if (PS_NEWPAGE & p->ps->flags)
1235 return;
1236
1237 if (TERMTYPE_PS == p->type)
1238 ps_printf(p, "/%s %zu selectfont\n",
1239 fonts[(int)f].name, p->ps->scale);
1240 else
1241 ps_printf(p, "/F%d %zu Tf\n",
1242 (int)f, p->ps->scale);
1243 }
1244
1245 static size_t
1246 ps_width(const struct termp *p, int c)
1247 {
1248
1249 if (c <= 32 || c - 32 >= MAXCHAR)
1250 c = 0;
1251 else
1252 c -= 32;
1253
1254 return((size_t)fonts[(int)TERMFONT_NONE].gly[c].wx);
1255 }
1256
1257 static double
1258 ps_hspan(const struct termp *p, const struct roffsu *su)
1259 {
1260 double r;
1261
1262 /*
1263 * All of these measurements are derived by converting from the
1264 * native measurement to AFM units.
1265 */
1266 switch (su->unit) {
1267 case SCALE_BU:
1268 /*
1269 * Traditionally, the default unit is fixed to the
1270 * output media. So this would refer to the point. In
1271 * mandoc(1), however, we stick to the default terminal
1272 * scaling unit so that output is the same regardless
1273 * the media.
1274 */
1275 r = PNT2AFM(p, su->scale * 72.0 / 240.0);
1276 break;
1277 case SCALE_CM:
1278 r = PNT2AFM(p, su->scale * 72.0 / 2.54);
1279 break;
1280 case SCALE_EM:
1281 r = su->scale *
1282 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx;
1283 break;
1284 case SCALE_EN:
1285 r = su->scale *
1286 fonts[(int)TERMFONT_NONE].gly[110 - 32].wx;
1287 break;
1288 case SCALE_IN:
1289 r = PNT2AFM(p, su->scale * 72.0);
1290 break;
1291 case SCALE_MM:
1292 r = su->scale *
1293 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx / 100.0;
1294 break;
1295 case SCALE_PC:
1296 r = PNT2AFM(p, su->scale * 12.0);
1297 break;
1298 case SCALE_PT:
1299 r = PNT2AFM(p, su->scale * 1.0);
1300 break;
1301 case SCALE_VS:
1302 r = su->scale * p->ps->lineheight;
1303 break;
1304 default:
1305 r = su->scale;
1306 break;
1307 }
1308
1309 return(r);
1310 }
1311
1312 static void
1313 ps_growbuf(struct termp *p, size_t sz)
1314 {
1315 if (p->ps->psmargcur + sz <= p->ps->psmargsz)
1316 return;
1317
1318 if (sz < PS_BUFSLOP)
1319 sz = PS_BUFSLOP;
1320
1321 p->ps->psmargsz += sz;
1322 p->ps->psmarg = mandoc_realloc(p->ps->psmarg, p->ps->psmargsz);
1323 }
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