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Remove the terminal frontend flag TERMP_NOLPAD.
[mandoc.git] / term_ps.c
1 /* $Id: term_ps.c,v 1.53 2011/09/18 14:14:15 schwarze Exp $ */
2 /*
3 * Copyright (c) 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
4 *
5 * Permission to use, copy, modify, and distribute this software for any
6 * purpose with or without fee is hereby granted, provided that the above
7 * copyright notice and this permission notice appear in all copies.
8 *
9 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16 */
17 #ifdef HAVE_CONFIG_H
18 #include "config.h"
19 #endif
20
21 #include <sys/types.h>
22
23 #include <assert.h>
24 #include <stdarg.h>
25 #include <stdint.h>
26 #include <stdio.h>
27 #include <stdlib.h>
28 #include <string.h>
29 #include <time.h>
30 #include <unistd.h>
31
32 #include "mandoc.h"
33 #include "out.h"
34 #include "main.h"
35 #include "term.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) /* LINTED */ \
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) /* LINTED */ \
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 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; /* character buffer */
69 enum termfont lastf; /* last set font */
70 size_t scale; /* font scaling factor */
71 size_t pages; /* number of pages shown */
72 size_t lineheight; /* line height (AFM units) */
73 size_t top; /* body top (AFM units) */
74 size_t bottom; /* body bottom (AFM units) */
75 size_t height; /* page height (AFM units */
76 size_t width; /* page width (AFM units) */
77 size_t left; /* body left (AFM units) */
78 size_t header; /* header pos (AFM units) */
79 size_t footer; /* footer pos (AFM units) */
80 size_t pdfbytes; /* current output byte */
81 size_t pdflastpg; /* byte of last page mark */
82 size_t pdfbody; /* start of body object */
83 size_t *pdfobjs; /* table of object offsets */
84 size_t pdfobjsz; /* size of pdfobjs */
85 };
86
87 static double ps_hspan(const struct termp *,
88 const struct roffsu *);
89 static size_t ps_width(const struct termp *, int);
90 static void ps_advance(struct termp *, size_t);
91 static void ps_begin(struct termp *);
92 static void ps_closepage(struct termp *);
93 static void ps_end(struct termp *);
94 static void ps_endline(struct termp *);
95 static void ps_fclose(struct termp *);
96 static void ps_growbuf(struct termp *, size_t);
97 static void ps_letter(struct termp *, int);
98 static void ps_pclose(struct termp *);
99 static void ps_pletter(struct termp *, int);
100 static void ps_printf(struct termp *, const char *, ...);
101 static void ps_putchar(struct termp *, char);
102 static void ps_setfont(struct termp *, enum termfont);
103 static struct termp *pspdf_alloc(char *);
104 static void pdf_obj(struct termp *, size_t);
105
106 /*
107 * We define, for the time being, three fonts: bold, oblique/italic, and
108 * normal (roman). The following table hard-codes the font metrics for
109 * ASCII, i.e., 32--127.
110 */
111
112 static const struct font fonts[TERMFONT__MAX] = {
113 { "Times-Roman", {
114 { 250 },
115 { 333 },
116 { 408 },
117 { 500 },
118 { 500 },
119 { 833 },
120 { 778 },
121 { 333 },
122 { 333 },
123 { 333 },
124 { 500 },
125 { 564 },
126 { 250 },
127 { 333 },
128 { 250 },
129 { 278 },
130 { 500 },
131 { 500 },
132 { 500 },
133 { 500 },
134 { 500 },
135 { 500 },
136 { 500 },
137 { 500 },
138 { 500 },
139 { 500 },
140 { 278 },
141 { 278 },
142 { 564 },
143 { 564 },
144 { 564 },
145 { 444 },
146 { 921 },
147 { 722 },
148 { 667 },
149 { 667 },
150 { 722 },
151 { 611 },
152 { 556 },
153 { 722 },
154 { 722 },
155 { 333 },
156 { 389 },
157 { 722 },
158 { 611 },
159 { 889 },
160 { 722 },
161 { 722 },
162 { 556 },
163 { 722 },
164 { 667 },
165 { 556 },
166 { 611 },
167 { 722 },
168 { 722 },
169 { 944 },
170 { 722 },
171 { 722 },
172 { 611 },
173 { 333 },
174 { 278 },
175 { 333 },
176 { 469 },
177 { 500 },
178 { 333 },
179 { 444 },
180 { 500 },
181 { 444 },
182 { 500},
183 { 444},
184 { 333},
185 { 500},
186 { 500},
187 { 278},
188 { 278},
189 { 500},
190 { 278},
191 { 778},
192 { 500},
193 { 500},
194 { 500},
195 { 500},
196 { 333},
197 { 389},
198 { 278},
199 { 500},
200 { 500},
201 { 722},
202 { 500},
203 { 500},
204 { 444},
205 { 480},
206 { 200},
207 { 480},
208 { 541},
209 } },
210 { "Times-Bold", {
211 { 250 },
212 { 333 },
213 { 555 },
214 { 500 },
215 { 500 },
216 { 1000 },
217 { 833 },
218 { 333 },
219 { 333 },
220 { 333 },
221 { 500 },
222 { 570 },
223 { 250 },
224 { 333 },
225 { 250 },
226 { 278 },
227 { 500 },
228 { 500 },
229 { 500 },
230 { 500 },
231 { 500 },
232 { 500 },
233 { 500 },
234 { 500 },
235 { 500 },
236 { 500 },
237 { 333 },
238 { 333 },
239 { 570 },
240 { 570 },
241 { 570 },
242 { 500 },
243 { 930 },
244 { 722 },
245 { 667 },
246 { 722 },
247 { 722 },
248 { 667 },
249 { 611 },
250 { 778 },
251 { 778 },
252 { 389 },
253 { 500 },
254 { 778 },
255 { 667 },
256 { 944 },
257 { 722 },
258 { 778 },
259 { 611 },
260 { 778 },
261 { 722 },
262 { 556 },
263 { 667 },
264 { 722 },
265 { 722 },
266 { 1000 },
267 { 722 },
268 { 722 },
269 { 667 },
270 { 333 },
271 { 278 },
272 { 333 },
273 { 581 },
274 { 500 },
275 { 333 },
276 { 500 },
277 { 556 },
278 { 444 },
279 { 556 },
280 { 444 },
281 { 333 },
282 { 500 },
283 { 556 },
284 { 278 },
285 { 333 },
286 { 556 },
287 { 278 },
288 { 833 },
289 { 556 },
290 { 500 },
291 { 556 },
292 { 556 },
293 { 444 },
294 { 389 },
295 { 333 },
296 { 556 },
297 { 500 },
298 { 722 },
299 { 500 },
300 { 500 },
301 { 444 },
302 { 394 },
303 { 220 },
304 { 394 },
305 { 520 },
306 } },
307 { "Times-Italic", {
308 { 250 },
309 { 333 },
310 { 420 },
311 { 500 },
312 { 500 },
313 { 833 },
314 { 778 },
315 { 333 },
316 { 333 },
317 { 333 },
318 { 500 },
319 { 675 },
320 { 250 },
321 { 333 },
322 { 250 },
323 { 278 },
324 { 500 },
325 { 500 },
326 { 500 },
327 { 500 },
328 { 500 },
329 { 500 },
330 { 500 },
331 { 500 },
332 { 500 },
333 { 500 },
334 { 333 },
335 { 333 },
336 { 675 },
337 { 675 },
338 { 675 },
339 { 500 },
340 { 920 },
341 { 611 },
342 { 611 },
343 { 667 },
344 { 722 },
345 { 611 },
346 { 611 },
347 { 722 },
348 { 722 },
349 { 333 },
350 { 444 },
351 { 667 },
352 { 556 },
353 { 833 },
354 { 667 },
355 { 722 },
356 { 611 },
357 { 722 },
358 { 611 },
359 { 500 },
360 { 556 },
361 { 722 },
362 { 611 },
363 { 833 },
364 { 611 },
365 { 556 },
366 { 556 },
367 { 389 },
368 { 278 },
369 { 389 },
370 { 422 },
371 { 500 },
372 { 333 },
373 { 500 },
374 { 500 },
375 { 444 },
376 { 500 },
377 { 444 },
378 { 278 },
379 { 500 },
380 { 500 },
381 { 278 },
382 { 278 },
383 { 444 },
384 { 278 },
385 { 722 },
386 { 500 },
387 { 500 },
388 { 500 },
389 { 500 },
390 { 389 },
391 { 389 },
392 { 278 },
393 { 500 },
394 { 444 },
395 { 667 },
396 { 444 },
397 { 444 },
398 { 389 },
399 { 400 },
400 { 275 },
401 { 400 },
402 { 541 },
403 } },
404 };
405
406 void *
407 pdf_alloc(char *outopts)
408 {
409 struct termp *p;
410
411 if (NULL != (p = pspdf_alloc(outopts)))
412 p->type = TERMTYPE_PDF;
413
414 return(p);
415 }
416
417 void *
418 ps_alloc(char *outopts)
419 {
420 struct termp *p;
421
422 if (NULL != (p = pspdf_alloc(outopts)))
423 p->type = TERMTYPE_PS;
424
425 return(p);
426 }
427
428 static struct termp *
429 pspdf_alloc(char *outopts)
430 {
431 struct termp *p;
432 unsigned int pagex, pagey;
433 size_t marginx, marginy, lineheight;
434 const char *toks[2];
435 const char *pp;
436 char *v;
437
438 p = mandoc_calloc(1, sizeof(struct termp));
439 p->enc = TERMENC_ASCII;
440 p->ps = mandoc_calloc(1, sizeof(struct termp_ps));
441
442 p->advance = ps_advance;
443 p->begin = ps_begin;
444 p->end = ps_end;
445 p->endline = ps_endline;
446 p->hspan = ps_hspan;
447 p->letter = ps_letter;
448 p->width = ps_width;
449
450 toks[0] = "paper";
451 toks[1] = NULL;
452
453 pp = NULL;
454
455 while (outopts && *outopts)
456 switch (getsubopt(&outopts, UNCONST(toks), &v)) {
457 case (0):
458 pp = v;
459 break;
460 default:
461 break;
462 }
463
464 /* Default to US letter (millimetres). */
465
466 pagex = 216;
467 pagey = 279;
468
469 /*
470 * The ISO-269 paper sizes can be calculated automatically, but
471 * it would require bringing in -lm for pow() and I'd rather not
472 * do that. So just do it the easy way for now. Since this
473 * only happens once, I'm not terribly concerned.
474 */
475
476 if (pp && strcasecmp(pp, "letter")) {
477 if (0 == strcasecmp(pp, "a3")) {
478 pagex = 297;
479 pagey = 420;
480 } else if (0 == strcasecmp(pp, "a4")) {
481 pagex = 210;
482 pagey = 297;
483 } else if (0 == strcasecmp(pp, "a5")) {
484 pagex = 148;
485 pagey = 210;
486 } else if (0 == strcasecmp(pp, "legal")) {
487 pagex = 216;
488 pagey = 356;
489 } else if (2 != sscanf(pp, "%ux%u", &pagex, &pagey))
490 fprintf(stderr, "%s: Unknown paper\n", pp);
491 } else if (NULL == pp)
492 pp = "letter";
493
494 /*
495 * This MUST be defined before any PNT2AFM or AFM2PNT
496 * calculations occur.
497 */
498
499 p->ps->scale = 11;
500
501 /* Remember millimetres -> AFM units. */
502
503 pagex = PNT2AFM(p, ((double)pagex * 2.834));
504 pagey = PNT2AFM(p, ((double)pagey * 2.834));
505
506 /* Margins are 1/9 the page x and y. */
507
508 marginx = /* LINTED */
509 (size_t)((double)pagex / 9.0);
510 marginy = /* LINTED */
511 (size_t)((double)pagey / 9.0);
512
513 /* Line-height is 1.4em. */
514
515 lineheight = PNT2AFM(p, ((double)p->ps->scale * 1.4));
516
517 p->ps->width = (size_t)pagex;
518 p->ps->height = (size_t)pagey;
519 p->ps->header = pagey - (marginy / 2) - (lineheight / 2);
520 p->ps->top = pagey - marginy;
521 p->ps->footer = (marginy / 2) - (lineheight / 2);
522 p->ps->bottom = marginy;
523 p->ps->left = marginx;
524 p->ps->lineheight = lineheight;
525
526 p->defrmargin = pagex - (marginx * 2);
527 return(p);
528 }
529
530
531 void
532 pspdf_free(void *arg)
533 {
534 struct termp *p;
535
536 p = (struct termp *)arg;
537
538 if (p->ps->psmarg)
539 free(p->ps->psmarg);
540 if (p->ps->pdfobjs)
541 free(p->ps->pdfobjs);
542
543 free(p->ps);
544 term_free(p);
545 }
546
547
548 static void
549 ps_printf(struct termp *p, const char *fmt, ...)
550 {
551 va_list ap;
552 int pos, len;
553
554 va_start(ap, fmt);
555
556 /*
557 * If we're running in regular mode, then pipe directly into
558 * vprintf(). If we're processing margins, then push the data
559 * into our growable margin buffer.
560 */
561
562 if ( ! (PS_MARGINS & p->ps->flags)) {
563 len = vprintf(fmt, ap);
564 va_end(ap);
565 p->ps->pdfbytes += /* LINTED */
566 len < 0 ? 0 : (size_t)len;
567 return;
568 }
569
570 /*
571 * XXX: I assume that the in-margin print won't exceed
572 * PS_BUFSLOP (128 bytes), which is reasonable but still an
573 * assumption that will cause pukeage if it's not the case.
574 */
575
576 ps_growbuf(p, PS_BUFSLOP);
577
578 pos = (int)p->ps->psmargcur;
579 len = vsnprintf(&p->ps->psmarg[pos], PS_BUFSLOP, fmt, ap);
580
581 va_end(ap);
582
583 p->ps->psmargcur = strlen(p->ps->psmarg);
584 }
585
586
587 static void
588 ps_putchar(struct termp *p, char c)
589 {
590 int pos;
591
592 /* See ps_printf(). */
593
594 if ( ! (PS_MARGINS & p->ps->flags)) {
595 /* LINTED */
596 putchar(c);
597 p->ps->pdfbytes++;
598 return;
599 }
600
601 ps_growbuf(p, 2);
602
603 pos = (int)p->ps->psmargcur++;
604 p->ps->psmarg[pos++] = c;
605 p->ps->psmarg[pos] = '\0';
606 }
607
608
609 static void
610 pdf_obj(struct termp *p, size_t obj)
611 {
612
613 assert(obj > 0);
614
615 if ((obj - 1) >= p->ps->pdfobjsz) {
616 p->ps->pdfobjsz = obj + 128;
617 p->ps->pdfobjs = realloc
618 (p->ps->pdfobjs,
619 p->ps->pdfobjsz * sizeof(size_t));
620 if (NULL == p->ps->pdfobjs) {
621 perror(NULL);
622 exit((int)MANDOCLEVEL_SYSERR);
623 }
624 }
625
626 p->ps->pdfobjs[(int)obj - 1] = p->ps->pdfbytes;
627 ps_printf(p, "%zu 0 obj\n", obj);
628 }
629
630
631 static void
632 ps_closepage(struct termp *p)
633 {
634 int i;
635 size_t len, base;
636
637 /*
638 * Close out a page that we've already flushed to output. In
639 * PostScript, we simply note that the page must be showed. In
640 * PDF, we must now create the Length, Resource, and Page node
641 * for the page contents.
642 */
643
644 assert(p->ps->psmarg && p->ps->psmarg[0]);
645 ps_printf(p, "%s", p->ps->psmarg);
646
647 if (TERMTYPE_PS != p->type) {
648 ps_printf(p, "ET\n");
649
650 len = p->ps->pdfbytes - p->ps->pdflastpg;
651 base = p->ps->pages * 4 + p->ps->pdfbody;
652
653 ps_printf(p, "endstream\nendobj\n");
654
655 /* Length of content. */
656 pdf_obj(p, base + 1);
657 ps_printf(p, "%zu\nendobj\n", len);
658
659 /* Resource for content. */
660 pdf_obj(p, base + 2);
661 ps_printf(p, "<<\n/ProcSet [/PDF /Text]\n");
662 ps_printf(p, "/Font <<\n");
663 for (i = 0; i < (int)TERMFONT__MAX; i++)
664 ps_printf(p, "/F%d %d 0 R\n", i, 3 + i);
665 ps_printf(p, ">>\n>>\n");
666
667 /* Page node. */
668 pdf_obj(p, base + 3);
669 ps_printf(p, "<<\n");
670 ps_printf(p, "/Type /Page\n");
671 ps_printf(p, "/Parent 2 0 R\n");
672 ps_printf(p, "/Resources %zu 0 R\n", base + 2);
673 ps_printf(p, "/Contents %zu 0 R\n", base);
674 ps_printf(p, ">>\nendobj\n");
675 } else
676 ps_printf(p, "showpage\n");
677
678 p->ps->pages++;
679 p->ps->psrow = p->ps->top;
680 assert( ! (PS_NEWPAGE & p->ps->flags));
681 p->ps->flags |= PS_NEWPAGE;
682 }
683
684
685 /* ARGSUSED */
686 static void
687 ps_end(struct termp *p)
688 {
689 size_t i, xref, base;
690
691 /*
692 * At the end of the file, do one last showpage. This is the
693 * same behaviour as groff(1) and works for multiple pages as
694 * well as just one.
695 */
696
697 if ( ! (PS_NEWPAGE & p->ps->flags)) {
698 assert(0 == p->ps->flags);
699 assert('\0' == p->ps->last);
700 ps_closepage(p);
701 }
702
703 if (TERMTYPE_PS == p->type) {
704 ps_printf(p, "%%%%Trailer\n");
705 ps_printf(p, "%%%%Pages: %zu\n", p->ps->pages);
706 ps_printf(p, "%%%%EOF\n");
707 return;
708 }
709
710 pdf_obj(p, 2);
711 ps_printf(p, "<<\n/Type /Pages\n");
712 ps_printf(p, "/MediaBox [0 0 %zu %zu]\n",
713 (size_t)AFM2PNT(p, p->ps->width),
714 (size_t)AFM2PNT(p, p->ps->height));
715
716 ps_printf(p, "/Count %zu\n", p->ps->pages);
717 ps_printf(p, "/Kids [");
718
719 for (i = 0; i < p->ps->pages; i++)
720 ps_printf(p, " %zu 0 R", i * 4 +
721 p->ps->pdfbody + 3);
722
723 base = (p->ps->pages - 1) * 4 +
724 p->ps->pdfbody + 4;
725
726 ps_printf(p, "]\n>>\nendobj\n");
727 pdf_obj(p, base);
728 ps_printf(p, "<<\n");
729 ps_printf(p, "/Type /Catalog\n");
730 ps_printf(p, "/Pages 2 0 R\n");
731 ps_printf(p, ">>\n");
732 xref = p->ps->pdfbytes;
733 ps_printf(p, "xref\n");
734 ps_printf(p, "0 %zu\n", base + 1);
735 ps_printf(p, "0000000000 65535 f \n");
736
737 for (i = 0; i < base; i++)
738 ps_printf(p, "%.10zu 00000 n \n",
739 p->ps->pdfobjs[(int)i]);
740
741 ps_printf(p, "trailer\n");
742 ps_printf(p, "<<\n");
743 ps_printf(p, "/Size %zu\n", base + 1);
744 ps_printf(p, "/Root %zu 0 R\n", base);
745 ps_printf(p, "/Info 1 0 R\n");
746 ps_printf(p, ">>\n");
747 ps_printf(p, "startxref\n");
748 ps_printf(p, "%zu\n", xref);
749 ps_printf(p, "%%%%EOF\n");
750 }
751
752
753 static void
754 ps_begin(struct termp *p)
755 {
756 time_t t;
757 int i;
758
759 /*
760 * Print margins into margin buffer. Nothing gets output to the
761 * screen yet, so we don't need to initialise the primary state.
762 */
763
764 if (p->ps->psmarg) {
765 assert(p->ps->psmargsz);
766 p->ps->psmarg[0] = '\0';
767 }
768
769 /*p->ps->pdfbytes = 0;*/
770 p->ps->psmargcur = 0;
771 p->ps->flags = PS_MARGINS;
772 p->ps->pscol = p->ps->left;
773 p->ps->psrow = p->ps->header;
774
775 ps_setfont(p, TERMFONT_NONE);
776
777 (*p->headf)(p, p->argf);
778 (*p->endline)(p);
779
780 p->ps->pscol = p->ps->left;
781 p->ps->psrow = p->ps->footer;
782
783 (*p->footf)(p, p->argf);
784 (*p->endline)(p);
785
786 p->ps->flags &= ~PS_MARGINS;
787
788 assert(0 == p->ps->flags);
789 assert(p->ps->psmarg);
790 assert('\0' != p->ps->psmarg[0]);
791
792 /*
793 * Print header and initialise page state. Following this,
794 * stuff gets printed to the screen, so make sure we're sane.
795 */
796
797 t = time(NULL);
798
799 if (TERMTYPE_PS == p->type) {
800 ps_printf(p, "%%!PS-Adobe-3.0\n");
801 ps_printf(p, "%%%%CreationDate: %s", ctime(&t));
802 ps_printf(p, "%%%%DocumentData: Clean7Bit\n");
803 ps_printf(p, "%%%%Orientation: Portrait\n");
804 ps_printf(p, "%%%%Pages: (atend)\n");
805 ps_printf(p, "%%%%PageOrder: Ascend\n");
806 ps_printf(p, "%%%%DocumentMedia: "
807 "Default %zu %zu 0 () ()\n",
808 (size_t)AFM2PNT(p, p->ps->width),
809 (size_t)AFM2PNT(p, p->ps->height));
810 ps_printf(p, "%%%%DocumentNeededResources: font");
811
812 for (i = 0; i < (int)TERMFONT__MAX; i++)
813 ps_printf(p, " %s", fonts[i].name);
814
815 ps_printf(p, "\n%%%%EndComments\n");
816 } else {
817 ps_printf(p, "%%PDF-1.1\n");
818 pdf_obj(p, 1);
819 ps_printf(p, "<<\n");
820 ps_printf(p, ">>\n");
821 ps_printf(p, "endobj\n");
822
823 for (i = 0; i < (int)TERMFONT__MAX; i++) {
824 pdf_obj(p, (size_t)i + 3);
825 ps_printf(p, "<<\n");
826 ps_printf(p, "/Type /Font\n");
827 ps_printf(p, "/Subtype /Type1\n");
828 ps_printf(p, "/Name /F%zu\n", i);
829 ps_printf(p, "/BaseFont /%s\n", fonts[i].name);
830 ps_printf(p, ">>\n");
831 }
832 }
833
834 p->ps->pdfbody = (size_t)TERMFONT__MAX + 3;
835 p->ps->pscol = p->ps->left;
836 p->ps->psrow = p->ps->top;
837 p->ps->flags |= PS_NEWPAGE;
838 ps_setfont(p, TERMFONT_NONE);
839 }
840
841
842 static void
843 ps_pletter(struct termp *p, int c)
844 {
845 int f;
846
847 /*
848 * If we haven't opened a page context, then output that we're
849 * in a new page and make sure the font is correctly set.
850 */
851
852 if (PS_NEWPAGE & p->ps->flags) {
853 if (TERMTYPE_PS == p->type) {
854 ps_printf(p, "%%%%Page: %zu %zu\n",
855 p->ps->pages + 1,
856 p->ps->pages + 1);
857 ps_printf(p, "/%s %zu selectfont\n",
858 fonts[(int)p->ps->lastf].name,
859 p->ps->scale);
860 } else {
861 pdf_obj(p, p->ps->pdfbody +
862 p->ps->pages * 4);
863 ps_printf(p, "<<\n");
864 ps_printf(p, "/Length %zu 0 R\n",
865 p->ps->pdfbody + 1 +
866 p->ps->pages * 4);
867 ps_printf(p, ">>\nstream\n");
868 }
869 p->ps->pdflastpg = p->ps->pdfbytes;
870 p->ps->flags &= ~PS_NEWPAGE;
871 }
872
873 /*
874 * If we're not in a PostScript "word" context, then open one
875 * now at the current cursor.
876 */
877
878 if ( ! (PS_INLINE & p->ps->flags)) {
879 if (TERMTYPE_PS != p->type) {
880 ps_printf(p, "BT\n/F%d %zu Tf\n",
881 (int)p->ps->lastf,
882 p->ps->scale);
883 ps_printf(p, "%.3f %.3f Td\n(",
884 AFM2PNT(p, p->ps->pscol),
885 AFM2PNT(p, p->ps->psrow));
886 } else
887 ps_printf(p, "%.3f %.3f moveto\n(",
888 AFM2PNT(p, p->ps->pscol),
889 AFM2PNT(p, p->ps->psrow));
890 p->ps->flags |= PS_INLINE;
891 }
892
893 assert( ! (PS_NEWPAGE & p->ps->flags));
894
895 /*
896 * We need to escape these characters as per the PostScript
897 * specification. We would also escape non-graphable characters
898 * (like tabs), but none of them would get to this point and
899 * it's superfluous to abort() on them.
900 */
901
902 switch (c) {
903 case ('('):
904 /* FALLTHROUGH */
905 case (')'):
906 /* FALLTHROUGH */
907 case ('\\'):
908 ps_putchar(p, '\\');
909 break;
910 default:
911 break;
912 }
913
914 /* Write the character and adjust where we are on the page. */
915
916 f = (int)p->ps->lastf;
917
918 if (c <= 32 || (c - 32 >= MAXCHAR)) {
919 ps_putchar(p, ' ');
920 p->ps->pscol += (size_t)fonts[f].gly[0].wx;
921 return;
922 }
923
924 ps_putchar(p, (char)c);
925 c -= 32;
926 p->ps->pscol += (size_t)fonts[f].gly[c].wx;
927 }
928
929
930 static void
931 ps_pclose(struct termp *p)
932 {
933
934 /*
935 * Spit out that we're exiting a word context (this is a
936 * "partial close" because we don't check the last-char buffer
937 * or anything).
938 */
939
940 if ( ! (PS_INLINE & p->ps->flags))
941 return;
942
943 if (TERMTYPE_PS != p->type) {
944 ps_printf(p, ") Tj\nET\n");
945 } else
946 ps_printf(p, ") show\n");
947
948 p->ps->flags &= ~PS_INLINE;
949 }
950
951
952 static void
953 ps_fclose(struct termp *p)
954 {
955
956 /*
957 * Strong closure: if we have a last-char, spit it out after
958 * checking that we're in the right font mode. This will of
959 * course open a new scope, if applicable.
960 *
961 * Following this, close out any scope that's open.
962 */
963
964 if ('\0' != p->ps->last) {
965 if (p->ps->lastf != TERMFONT_NONE) {
966 ps_pclose(p);
967 ps_setfont(p, TERMFONT_NONE);
968 }
969 ps_pletter(p, p->ps->last);
970 p->ps->last = '\0';
971 }
972
973 if ( ! (PS_INLINE & p->ps->flags))
974 return;
975
976 ps_pclose(p);
977 }
978
979
980 static void
981 ps_letter(struct termp *p, int arg)
982 {
983 char cc, c;
984
985 /* LINTED */
986 c = arg >= 128 || arg <= 0 ? '?' : arg;
987
988 /*
989 * State machine dictates whether to buffer the last character
990 * or not. Basically, encoded words are detected by checking if
991 * we're an "8" and switching on the buffer. Then we put "8" in
992 * our buffer, and on the next charater, flush both character
993 * and buffer. Thus, "regular" words are detected by having a
994 * regular character and a regular buffer character.
995 */
996
997 if ('\0' == p->ps->last) {
998 assert(8 != c);
999 p->ps->last = c;
1000 return;
1001 } else if (8 == p->ps->last) {
1002 assert(8 != c);
1003 p->ps->last = '\0';
1004 } else if (8 == c) {
1005 assert(8 != p->ps->last);
1006 if ('_' == p->ps->last) {
1007 if (p->ps->lastf != TERMFONT_UNDER) {
1008 ps_pclose(p);
1009 ps_setfont(p, TERMFONT_UNDER);
1010 }
1011 } else if (p->ps->lastf != TERMFONT_BOLD) {
1012 ps_pclose(p);
1013 ps_setfont(p, TERMFONT_BOLD);
1014 }
1015 p->ps->last = c;
1016 return;
1017 } else {
1018 if (p->ps->lastf != TERMFONT_NONE) {
1019 ps_pclose(p);
1020 ps_setfont(p, TERMFONT_NONE);
1021 }
1022 cc = p->ps->last;
1023 p->ps->last = c;
1024 c = cc;
1025 }
1026
1027 ps_pletter(p, c);
1028 }
1029
1030
1031 static void
1032 ps_advance(struct termp *p, size_t len)
1033 {
1034
1035 /*
1036 * Advance some spaces. This can probably be made smarter,
1037 * i.e., to have multiple space-separated words in the same
1038 * scope, but this is easier: just close out the current scope
1039 * and readjust our column settings.
1040 */
1041
1042 ps_fclose(p);
1043 p->ps->pscol += len;
1044 }
1045
1046
1047 static void
1048 ps_endline(struct termp *p)
1049 {
1050
1051 /* Close out any scopes we have open: we're at eoln. */
1052
1053 ps_fclose(p);
1054
1055 /*
1056 * If we're in the margin, don't try to recalculate our current
1057 * row. XXX: if the column tries to be fancy with multiple
1058 * lines, we'll do nasty stuff.
1059 */
1060
1061 if (PS_MARGINS & p->ps->flags)
1062 return;
1063
1064 /* Left-justify. */
1065
1066 p->ps->pscol = p->ps->left;
1067
1068 /* If we haven't printed anything, return. */
1069
1070 if (PS_NEWPAGE & p->ps->flags)
1071 return;
1072
1073 /*
1074 * Put us down a line. If we're at the page bottom, spit out a
1075 * showpage and restart our row.
1076 */
1077
1078 if (p->ps->psrow >= p->ps->lineheight +
1079 p->ps->bottom) {
1080 p->ps->psrow -= p->ps->lineheight;
1081 return;
1082 }
1083
1084 ps_closepage(p);
1085 }
1086
1087
1088 static void
1089 ps_setfont(struct termp *p, enum termfont f)
1090 {
1091
1092 assert(f < TERMFONT__MAX);
1093 p->ps->lastf = f;
1094
1095 /*
1096 * If we're still at the top of the page, let the font-setting
1097 * be delayed until we actually have stuff to print.
1098 */
1099
1100 if (PS_NEWPAGE & p->ps->flags)
1101 return;
1102
1103 if (TERMTYPE_PS == p->type)
1104 ps_printf(p, "/%s %zu selectfont\n",
1105 fonts[(int)f].name,
1106 p->ps->scale);
1107 else
1108 ps_printf(p, "/F%d %zu Tf\n",
1109 (int)f,
1110 p->ps->scale);
1111 }
1112
1113
1114 /* ARGSUSED */
1115 static size_t
1116 ps_width(const struct termp *p, int c)
1117 {
1118
1119 if (c <= 32 || c - 32 >= MAXCHAR)
1120 return((size_t)fonts[(int)TERMFONT_NONE].gly[0].wx);
1121
1122 c -= 32;
1123 return((size_t)fonts[(int)TERMFONT_NONE].gly[c].wx);
1124 }
1125
1126
1127 static double
1128 ps_hspan(const struct termp *p, const struct roffsu *su)
1129 {
1130 double r;
1131
1132 /*
1133 * All of these measurements are derived by converting from the
1134 * native measurement to AFM units.
1135 */
1136
1137 switch (su->unit) {
1138 case (SCALE_CM):
1139 r = PNT2AFM(p, su->scale * 28.34);
1140 break;
1141 case (SCALE_IN):
1142 r = PNT2AFM(p, su->scale * 72);
1143 break;
1144 case (SCALE_PC):
1145 r = PNT2AFM(p, su->scale * 12);
1146 break;
1147 case (SCALE_PT):
1148 r = PNT2AFM(p, su->scale * 100);
1149 break;
1150 case (SCALE_EM):
1151 r = su->scale *
1152 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx;
1153 break;
1154 case (SCALE_MM):
1155 r = PNT2AFM(p, su->scale * 2.834);
1156 break;
1157 case (SCALE_EN):
1158 r = su->scale *
1159 fonts[(int)TERMFONT_NONE].gly[110 - 32].wx;
1160 break;
1161 case (SCALE_VS):
1162 r = su->scale * p->ps->lineheight;
1163 break;
1164 default:
1165 r = su->scale;
1166 break;
1167 }
1168
1169 return(r);
1170 }
1171
1172 static void
1173 ps_growbuf(struct termp *p, size_t sz)
1174 {
1175 if (p->ps->psmargcur + sz <= p->ps->psmargsz)
1176 return;
1177
1178 if (sz < PS_BUFSLOP)
1179 sz = PS_BUFSLOP;
1180
1181 p->ps->psmargsz += sz;
1182
1183 p->ps->psmarg = mandoc_realloc
1184 (p->ps->psmarg, p->ps->psmargsz);
1185 }
1186
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