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[mandoc.git] / term_ps.c
1 /* $Id: term_ps.c,v 1.59 2014/04/20 16:46:05 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 #ifdef HAVE_CONFIG_H
19 #include "config.h"
20 #endif
21
22 #include <sys/types.h>
23
24 #include <assert.h>
25 #include <stdarg.h>
26 #include <stdint.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <time.h>
31 #include <unistd.h>
32
33 #include "mandoc.h"
34 #include "mandoc_aux.h"
35 #include "out.h"
36 #include "main.h"
37 #include "term.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 size_t pscol; /* visible column (AFM units) */
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; /* character buffer */
71 enum termfont lastf; /* last set font */
72 size_t scale; /* font scaling factor */
73 size_t pages; /* number of pages shown */
74 size_t lineheight; /* line height (AFM units) */
75 size_t top; /* body top (AFM units) */
76 size_t bottom; /* body bottom (AFM units) */
77 size_t height; /* page height (AFM units */
78 size_t width; /* page width (AFM units) */
79 size_t lastwidth; /* page width before last ll */
80 size_t left; /* body left (AFM units) */
81 size_t header; /* header pos (AFM units) */
82 size_t footer; /* footer pos (AFM units) */
83 size_t pdfbytes; /* current output byte */
84 size_t pdflastpg; /* byte of last page mark */
85 size_t pdfbody; /* start of body object */
86 size_t *pdfobjs; /* table of object offsets */
87 size_t pdfobjsz; /* size of pdfobjs */
88 };
89
90 static double ps_hspan(const struct termp *,
91 const struct roffsu *);
92 static size_t ps_width(const struct termp *, int);
93 static void ps_advance(struct termp *, size_t);
94 static void ps_begin(struct termp *);
95 static void ps_closepage(struct termp *);
96 static void ps_end(struct termp *);
97 static void ps_endline(struct termp *);
98 static void ps_fclose(struct termp *);
99 static void ps_growbuf(struct termp *, size_t);
100 static void ps_letter(struct termp *, int);
101 static void ps_pclose(struct termp *);
102 static void ps_pletter(struct termp *, int);
103 #if __GNUC__ - 0 >= 4
104 __attribute__((__format__ (__printf__, 2, 3)))
105 #endif
106 static void ps_printf(struct termp *, const char *, ...);
107 static void ps_putchar(struct termp *, char);
108 static void ps_setfont(struct termp *, enum termfont);
109 static void ps_setwidth(struct termp *, int, size_t);
110 static struct termp *pspdf_alloc(char *);
111 static void pdf_obj(struct termp *, size_t);
112
113 /*
114 * We define, for the time being, three fonts: bold, oblique/italic, and
115 * normal (roman). The following table hard-codes the font metrics for
116 * ASCII, i.e., 32--127.
117 */
118
119 static const struct font fonts[TERMFONT__MAX] = {
120 { "Times-Roman", {
121 { 250 },
122 { 333 },
123 { 408 },
124 { 500 },
125 { 500 },
126 { 833 },
127 { 778 },
128 { 333 },
129 { 333 },
130 { 333 },
131 { 500 },
132 { 564 },
133 { 250 },
134 { 333 },
135 { 250 },
136 { 278 },
137 { 500 },
138 { 500 },
139 { 500 },
140 { 500 },
141 { 500 },
142 { 500 },
143 { 500 },
144 { 500 },
145 { 500 },
146 { 500 },
147 { 278 },
148 { 278 },
149 { 564 },
150 { 564 },
151 { 564 },
152 { 444 },
153 { 921 },
154 { 722 },
155 { 667 },
156 { 667 },
157 { 722 },
158 { 611 },
159 { 556 },
160 { 722 },
161 { 722 },
162 { 333 },
163 { 389 },
164 { 722 },
165 { 611 },
166 { 889 },
167 { 722 },
168 { 722 },
169 { 556 },
170 { 722 },
171 { 667 },
172 { 556 },
173 { 611 },
174 { 722 },
175 { 722 },
176 { 944 },
177 { 722 },
178 { 722 },
179 { 611 },
180 { 333 },
181 { 278 },
182 { 333 },
183 { 469 },
184 { 500 },
185 { 333 },
186 { 444 },
187 { 500 },
188 { 444 },
189 { 500},
190 { 444},
191 { 333},
192 { 500},
193 { 500},
194 { 278},
195 { 278},
196 { 500},
197 { 278},
198 { 778},
199 { 500},
200 { 500},
201 { 500},
202 { 500},
203 { 333},
204 { 389},
205 { 278},
206 { 500},
207 { 500},
208 { 722},
209 { 500},
210 { 500},
211 { 444},
212 { 480},
213 { 200},
214 { 480},
215 { 541},
216 } },
217 { "Times-Bold", {
218 { 250 },
219 { 333 },
220 { 555 },
221 { 500 },
222 { 500 },
223 { 1000 },
224 { 833 },
225 { 333 },
226 { 333 },
227 { 333 },
228 { 500 },
229 { 570 },
230 { 250 },
231 { 333 },
232 { 250 },
233 { 278 },
234 { 500 },
235 { 500 },
236 { 500 },
237 { 500 },
238 { 500 },
239 { 500 },
240 { 500 },
241 { 500 },
242 { 500 },
243 { 500 },
244 { 333 },
245 { 333 },
246 { 570 },
247 { 570 },
248 { 570 },
249 { 500 },
250 { 930 },
251 { 722 },
252 { 667 },
253 { 722 },
254 { 722 },
255 { 667 },
256 { 611 },
257 { 778 },
258 { 778 },
259 { 389 },
260 { 500 },
261 { 778 },
262 { 667 },
263 { 944 },
264 { 722 },
265 { 778 },
266 { 611 },
267 { 778 },
268 { 722 },
269 { 556 },
270 { 667 },
271 { 722 },
272 { 722 },
273 { 1000 },
274 { 722 },
275 { 722 },
276 { 667 },
277 { 333 },
278 { 278 },
279 { 333 },
280 { 581 },
281 { 500 },
282 { 333 },
283 { 500 },
284 { 556 },
285 { 444 },
286 { 556 },
287 { 444 },
288 { 333 },
289 { 500 },
290 { 556 },
291 { 278 },
292 { 333 },
293 { 556 },
294 { 278 },
295 { 833 },
296 { 556 },
297 { 500 },
298 { 556 },
299 { 556 },
300 { 444 },
301 { 389 },
302 { 333 },
303 { 556 },
304 { 500 },
305 { 722 },
306 { 500 },
307 { 500 },
308 { 444 },
309 { 394 },
310 { 220 },
311 { 394 },
312 { 520 },
313 } },
314 { "Times-Italic", {
315 { 250 },
316 { 333 },
317 { 420 },
318 { 500 },
319 { 500 },
320 { 833 },
321 { 778 },
322 { 333 },
323 { 333 },
324 { 333 },
325 { 500 },
326 { 675 },
327 { 250 },
328 { 333 },
329 { 250 },
330 { 278 },
331 { 500 },
332 { 500 },
333 { 500 },
334 { 500 },
335 { 500 },
336 { 500 },
337 { 500 },
338 { 500 },
339 { 500 },
340 { 500 },
341 { 333 },
342 { 333 },
343 { 675 },
344 { 675 },
345 { 675 },
346 { 500 },
347 { 920 },
348 { 611 },
349 { 611 },
350 { 667 },
351 { 722 },
352 { 611 },
353 { 611 },
354 { 722 },
355 { 722 },
356 { 333 },
357 { 444 },
358 { 667 },
359 { 556 },
360 { 833 },
361 { 667 },
362 { 722 },
363 { 611 },
364 { 722 },
365 { 611 },
366 { 500 },
367 { 556 },
368 { 722 },
369 { 611 },
370 { 833 },
371 { 611 },
372 { 556 },
373 { 556 },
374 { 389 },
375 { 278 },
376 { 389 },
377 { 422 },
378 { 500 },
379 { 333 },
380 { 500 },
381 { 500 },
382 { 444 },
383 { 500 },
384 { 444 },
385 { 278 },
386 { 500 },
387 { 500 },
388 { 278 },
389 { 278 },
390 { 444 },
391 { 278 },
392 { 722 },
393 { 500 },
394 { 500 },
395 { 500 },
396 { 500 },
397 { 389 },
398 { 389 },
399 { 278 },
400 { 500 },
401 { 444 },
402 { 667 },
403 { 444 },
404 { 444 },
405 { 389 },
406 { 400 },
407 { 275 },
408 { 400 },
409 { 541 },
410 } },
411 };
412
413 void *
414 pdf_alloc(char *outopts)
415 {
416 struct termp *p;
417
418 if (NULL != (p = pspdf_alloc(outopts)))
419 p->type = TERMTYPE_PDF;
420
421 return(p);
422 }
423
424 void *
425 ps_alloc(char *outopts)
426 {
427 struct termp *p;
428
429 if (NULL != (p = pspdf_alloc(outopts)))
430 p->type = TERMTYPE_PS;
431
432 return(p);
433 }
434
435 static struct termp *
436 pspdf_alloc(char *outopts)
437 {
438 struct termp *p;
439 unsigned int pagex, pagey;
440 size_t marginx, marginy, lineheight;
441 const char *toks[2];
442 const char *pp;
443 char *v;
444
445 p = mandoc_calloc(1, sizeof(struct termp));
446 p->enc = TERMENC_ASCII;
447 p->ps = mandoc_calloc(1, sizeof(struct termp_ps));
448
449 p->advance = ps_advance;
450 p->begin = ps_begin;
451 p->end = ps_end;
452 p->endline = ps_endline;
453 p->hspan = ps_hspan;
454 p->letter = ps_letter;
455 p->setwidth = ps_setwidth;
456 p->width = ps_width;
457
458 toks[0] = "paper";
459 toks[1] = NULL;
460
461 pp = NULL;
462
463 while (outopts && *outopts)
464 switch (getsubopt(&outopts, UNCONST(toks), &v)) {
465 case 0:
466 pp = v;
467 break;
468 default:
469 break;
470 }
471
472 /* Default to US letter (millimetres). */
473
474 pagex = 216;
475 pagey = 279;
476
477 /*
478 * The ISO-269 paper sizes can be calculated automatically, but
479 * it would require bringing in -lm for pow() and I'd rather not
480 * do that. So just do it the easy way for now. Since this
481 * only happens once, I'm not terribly concerned.
482 */
483
484 if (pp && strcasecmp(pp, "letter")) {
485 if (0 == strcasecmp(pp, "a3")) {
486 pagex = 297;
487 pagey = 420;
488 } else if (0 == strcasecmp(pp, "a4")) {
489 pagex = 210;
490 pagey = 297;
491 } else if (0 == strcasecmp(pp, "a5")) {
492 pagex = 148;
493 pagey = 210;
494 } else if (0 == strcasecmp(pp, "legal")) {
495 pagex = 216;
496 pagey = 356;
497 } else if (2 != sscanf(pp, "%ux%u", &pagex, &pagey))
498 fprintf(stderr, "%s: Unknown paper\n", pp);
499 }
500
501 /*
502 * This MUST be defined before any PNT2AFM or AFM2PNT
503 * calculations occur.
504 */
505
506 p->ps->scale = 11;
507
508 /* Remember millimetres -> AFM units. */
509
510 pagex = PNT2AFM(p, ((double)pagex * 2.834));
511 pagey = PNT2AFM(p, ((double)pagey * 2.834));
512
513 /* Margins are 1/9 the page x and y. */
514
515 marginx = (size_t)((double)pagex / 9.0);
516 marginy = (size_t)((double)pagey / 9.0);
517
518 /* Line-height is 1.4em. */
519
520 lineheight = PNT2AFM(p, ((double)p->ps->scale * 1.4));
521
522 p->ps->width = p->ps->lastwidth = (size_t)pagex;
523 p->ps->height = (size_t)pagey;
524 p->ps->header = pagey - (marginy / 2) - (lineheight / 2);
525 p->ps->top = pagey - marginy;
526 p->ps->footer = (marginy / 2) - (lineheight / 2);
527 p->ps->bottom = marginy;
528 p->ps->left = marginx;
529 p->ps->lineheight = lineheight;
530
531 p->defrmargin = pagex - (marginx * 2);
532 return(p);
533 }
534
535 static void
536 ps_setwidth(struct termp *p, int iop, size_t width)
537 {
538 size_t lastwidth;
539
540 lastwidth = p->ps->width;
541 if (0 < iop)
542 p->ps->width += width;
543 else if (0 > iop)
544 p->ps->width -= width;
545 else
546 p->ps->width = width ? width : p->ps->lastwidth;
547 p->ps->lastwidth = lastwidth;
548 }
549
550 void
551 pspdf_free(void *arg)
552 {
553 struct termp *p;
554
555 p = (struct termp *)arg;
556
557 if (p->ps->psmarg)
558 free(p->ps->psmarg);
559 if (p->ps->pdfobjs)
560 free(p->ps->pdfobjs);
561
562 free(p->ps);
563 term_free(p);
564 }
565
566 static void
567 ps_printf(struct termp *p, const char *fmt, ...)
568 {
569 va_list ap;
570 int pos, len;
571
572 va_start(ap, fmt);
573
574 /*
575 * If we're running in regular mode, then pipe directly into
576 * vprintf(). If we're processing margins, then push the data
577 * into our growable margin buffer.
578 */
579
580 if ( ! (PS_MARGINS & p->ps->flags)) {
581 len = vprintf(fmt, ap);
582 va_end(ap);
583 p->ps->pdfbytes += len < 0 ? 0 : (size_t)len;
584 return;
585 }
586
587 /*
588 * XXX: I assume that the in-margin print won't exceed
589 * PS_BUFSLOP (128 bytes), which is reasonable but still an
590 * assumption that will cause pukeage if it's not the case.
591 */
592
593 ps_growbuf(p, PS_BUFSLOP);
594
595 pos = (int)p->ps->psmargcur;
596 vsnprintf(&p->ps->psmarg[pos], PS_BUFSLOP, fmt, ap);
597
598 va_end(ap);
599
600 p->ps->psmargcur = strlen(p->ps->psmarg);
601 }
602
603 static void
604 ps_putchar(struct termp *p, char c)
605 {
606 int pos;
607
608 /* See ps_printf(). */
609
610 if ( ! (PS_MARGINS & p->ps->flags)) {
611 putchar(c);
612 p->ps->pdfbytes++;
613 return;
614 }
615
616 ps_growbuf(p, 2);
617
618 pos = (int)p->ps->psmargcur++;
619 p->ps->psmarg[pos++] = c;
620 p->ps->psmarg[pos] = '\0';
621 }
622
623 static void
624 pdf_obj(struct termp *p, size_t obj)
625 {
626
627 assert(obj > 0);
628
629 if ((obj - 1) >= p->ps->pdfobjsz) {
630 p->ps->pdfobjsz = obj + 128;
631 p->ps->pdfobjs = realloc(p->ps->pdfobjs,
632 p->ps->pdfobjsz * sizeof(size_t));
633 if (NULL == p->ps->pdfobjs) {
634 perror(NULL);
635 exit((int)MANDOCLEVEL_SYSERR);
636 }
637 }
638
639 p->ps->pdfobjs[(int)obj - 1] = p->ps->pdfbytes;
640 ps_printf(p, "%zu 0 obj\n", obj);
641 }
642
643 static void
644 ps_closepage(struct termp *p)
645 {
646 int i;
647 size_t len, base;
648
649 /*
650 * Close out a page that we've already flushed to output. In
651 * PostScript, we simply note that the page must be showed. In
652 * PDF, we must now create the Length, Resource, and Page node
653 * for the page contents.
654 */
655
656 assert(p->ps->psmarg && p->ps->psmarg[0]);
657 ps_printf(p, "%s", p->ps->psmarg);
658
659 if (TERMTYPE_PS != p->type) {
660 ps_printf(p, "ET\n");
661
662 len = p->ps->pdfbytes - p->ps->pdflastpg;
663 base = p->ps->pages * 4 + p->ps->pdfbody;
664
665 ps_printf(p, "endstream\nendobj\n");
666
667 /* Length of content. */
668 pdf_obj(p, base + 1);
669 ps_printf(p, "%zu\nendobj\n", len);
670
671 /* Resource for content. */
672 pdf_obj(p, base + 2);
673 ps_printf(p, "<<\n/ProcSet [/PDF /Text]\n");
674 ps_printf(p, "/Font <<\n");
675 for (i = 0; i < (int)TERMFONT__MAX; i++)
676 ps_printf(p, "/F%d %d 0 R\n", i, 3 + i);
677 ps_printf(p, ">>\n>>\n");
678
679 /* Page node. */
680 pdf_obj(p, base + 3);
681 ps_printf(p, "<<\n");
682 ps_printf(p, "/Type /Page\n");
683 ps_printf(p, "/Parent 2 0 R\n");
684 ps_printf(p, "/Resources %zu 0 R\n", base + 2);
685 ps_printf(p, "/Contents %zu 0 R\n", base);
686 ps_printf(p, ">>\nendobj\n");
687 } else
688 ps_printf(p, "showpage\n");
689
690 p->ps->pages++;
691 p->ps->psrow = p->ps->top;
692 assert( ! (PS_NEWPAGE & p->ps->flags));
693 p->ps->flags |= PS_NEWPAGE;
694 }
695
696 static void
697 ps_end(struct termp *p)
698 {
699 size_t i, xref, base;
700
701 /*
702 * At the end of the file, do one last showpage. This is the
703 * same behaviour as groff(1) and works for multiple pages as
704 * well as just one.
705 */
706
707 if ( ! (PS_NEWPAGE & p->ps->flags)) {
708 assert(0 == p->ps->flags);
709 assert('\0' == p->ps->last);
710 ps_closepage(p);
711 }
712
713 if (TERMTYPE_PS == p->type) {
714 ps_printf(p, "%%%%Trailer\n");
715 ps_printf(p, "%%%%Pages: %zu\n", p->ps->pages);
716 ps_printf(p, "%%%%EOF\n");
717 return;
718 }
719
720 pdf_obj(p, 2);
721 ps_printf(p, "<<\n/Type /Pages\n");
722 ps_printf(p, "/MediaBox [0 0 %zu %zu]\n",
723 (size_t)AFM2PNT(p, p->ps->width),
724 (size_t)AFM2PNT(p, p->ps->height));
725
726 ps_printf(p, "/Count %zu\n", p->ps->pages);
727 ps_printf(p, "/Kids [");
728
729 for (i = 0; i < p->ps->pages; i++)
730 ps_printf(p, " %zu 0 R", i * 4 + p->ps->pdfbody + 3);
731
732 base = (p->ps->pages - 1) * 4 + p->ps->pdfbody + 4;
733
734 ps_printf(p, "]\n>>\nendobj\n");
735 pdf_obj(p, base);
736 ps_printf(p, "<<\n");
737 ps_printf(p, "/Type /Catalog\n");
738 ps_printf(p, "/Pages 2 0 R\n");
739 ps_printf(p, ">>\n");
740 xref = p->ps->pdfbytes;
741 ps_printf(p, "xref\n");
742 ps_printf(p, "0 %zu\n", base + 1);
743 ps_printf(p, "0000000000 65535 f \n");
744
745 for (i = 0; i < base; i++)
746 ps_printf(p, "%.10zu 00000 n \n",
747 p->ps->pdfobjs[(int)i]);
748
749 ps_printf(p, "trailer\n");
750 ps_printf(p, "<<\n");
751 ps_printf(p, "/Size %zu\n", base + 1);
752 ps_printf(p, "/Root %zu 0 R\n", base);
753 ps_printf(p, "/Info 1 0 R\n");
754 ps_printf(p, ">>\n");
755 ps_printf(p, "startxref\n");
756 ps_printf(p, "%zu\n", xref);
757 ps_printf(p, "%%%%EOF\n");
758 }
759
760 static void
761 ps_begin(struct termp *p)
762 {
763 time_t t;
764 int i;
765
766 /*
767 * Print margins into margin buffer. Nothing gets output to the
768 * screen yet, so we don't need to initialise the primary state.
769 */
770
771 if (p->ps->psmarg) {
772 assert(p->ps->psmargsz);
773 p->ps->psmarg[0] = '\0';
774 }
775
776 /*p->ps->pdfbytes = 0;*/
777 p->ps->psmargcur = 0;
778 p->ps->flags = PS_MARGINS;
779 p->ps->pscol = p->ps->left;
780 p->ps->psrow = p->ps->header;
781
782 ps_setfont(p, TERMFONT_NONE);
783
784 (*p->headf)(p, p->argf);
785 (*p->endline)(p);
786
787 p->ps->pscol = p->ps->left;
788 p->ps->psrow = p->ps->footer;
789
790 (*p->footf)(p, p->argf);
791 (*p->endline)(p);
792
793 p->ps->flags &= ~PS_MARGINS;
794
795 assert(0 == p->ps->flags);
796 assert(p->ps->psmarg);
797 assert('\0' != p->ps->psmarg[0]);
798
799 /*
800 * Print header and initialise page state. Following this,
801 * stuff gets printed to the screen, so make sure we're sane.
802 */
803
804 t = time(NULL);
805
806 if (TERMTYPE_PS == p->type) {
807 ps_printf(p, "%%!PS-Adobe-3.0\n");
808 ps_printf(p, "%%%%CreationDate: %s", ctime(&t));
809 ps_printf(p, "%%%%DocumentData: Clean7Bit\n");
810 ps_printf(p, "%%%%Orientation: Portrait\n");
811 ps_printf(p, "%%%%Pages: (atend)\n");
812 ps_printf(p, "%%%%PageOrder: Ascend\n");
813 ps_printf(p, "%%%%DocumentMedia: "
814 "Default %zu %zu 0 () ()\n",
815 (size_t)AFM2PNT(p, p->ps->width),
816 (size_t)AFM2PNT(p, p->ps->height));
817 ps_printf(p, "%%%%DocumentNeededResources: font");
818
819 for (i = 0; i < (int)TERMFONT__MAX; i++)
820 ps_printf(p, " %s", fonts[i].name);
821
822 ps_printf(p, "\n%%%%EndComments\n");
823 } else {
824 ps_printf(p, "%%PDF-1.1\n");
825 pdf_obj(p, 1);
826 ps_printf(p, "<<\n");
827 ps_printf(p, ">>\n");
828 ps_printf(p, "endobj\n");
829
830 for (i = 0; i < (int)TERMFONT__MAX; i++) {
831 pdf_obj(p, (size_t)i + 3);
832 ps_printf(p, "<<\n");
833 ps_printf(p, "/Type /Font\n");
834 ps_printf(p, "/Subtype /Type1\n");
835 ps_printf(p, "/Name /F%d\n", i);
836 ps_printf(p, "/BaseFont /%s\n", fonts[i].name);
837 ps_printf(p, ">>\n");
838 }
839 }
840
841 p->ps->pdfbody = (size_t)TERMFONT__MAX + 3;
842 p->ps->pscol = p->ps->left;
843 p->ps->psrow = p->ps->top;
844 p->ps->flags |= PS_NEWPAGE;
845 ps_setfont(p, TERMFONT_NONE);
846 }
847
848 static void
849 ps_pletter(struct termp *p, int c)
850 {
851 int f;
852
853 /*
854 * If we haven't opened a page context, then output that we're
855 * in a new page and make sure the font is correctly set.
856 */
857
858 if (PS_NEWPAGE & p->ps->flags) {
859 if (TERMTYPE_PS == p->type) {
860 ps_printf(p, "%%%%Page: %zu %zu\n",
861 p->ps->pages + 1, p->ps->pages + 1);
862 ps_printf(p, "/%s %zu selectfont\n",
863 fonts[(int)p->ps->lastf].name,
864 p->ps->scale);
865 } else {
866 pdf_obj(p, p->ps->pdfbody +
867 p->ps->pages * 4);
868 ps_printf(p, "<<\n");
869 ps_printf(p, "/Length %zu 0 R\n",
870 p->ps->pdfbody + 1 + p->ps->pages * 4);
871 ps_printf(p, ">>\nstream\n");
872 }
873 p->ps->pdflastpg = p->ps->pdfbytes;
874 p->ps->flags &= ~PS_NEWPAGE;
875 }
876
877 /*
878 * If we're not in a PostScript "word" context, then open one
879 * now at the current cursor.
880 */
881
882 if ( ! (PS_INLINE & p->ps->flags)) {
883 if (TERMTYPE_PS != p->type) {
884 ps_printf(p, "BT\n/F%d %zu Tf\n",
885 (int)p->ps->lastf, p->ps->scale);
886 ps_printf(p, "%.3f %.3f Td\n(",
887 AFM2PNT(p, p->ps->pscol),
888 AFM2PNT(p, p->ps->psrow));
889 } else
890 ps_printf(p, "%.3f %.3f moveto\n(",
891 AFM2PNT(p, p->ps->pscol),
892 AFM2PNT(p, p->ps->psrow));
893 p->ps->flags |= PS_INLINE;
894 }
895
896 assert( ! (PS_NEWPAGE & p->ps->flags));
897
898 /*
899 * We need to escape these characters as per the PostScript
900 * specification. We would also escape non-graphable characters
901 * (like tabs), but none of them would get to this point and
902 * it's superfluous to abort() on them.
903 */
904
905 switch (c) {
906 case '(':
907 /* FALLTHROUGH */
908 case ')':
909 /* FALLTHROUGH */
910 case '\\':
911 ps_putchar(p, '\\');
912 break;
913 default:
914 break;
915 }
916
917 /* Write the character and adjust where we are on the page. */
918
919 f = (int)p->ps->lastf;
920
921 if (c <= 32 || (c - 32 >= MAXCHAR)) {
922 ps_putchar(p, ' ');
923 p->ps->pscol += (size_t)fonts[f].gly[0].wx;
924 return;
925 }
926
927 ps_putchar(p, (char)c);
928 c -= 32;
929 p->ps->pscol += (size_t)fonts[f].gly[c].wx;
930 }
931
932 static void
933 ps_pclose(struct termp *p)
934 {
935
936 /*
937 * Spit out that we're exiting a word context (this is a
938 * "partial close" because we don't check the last-char buffer
939 * or anything).
940 */
941
942 if ( ! (PS_INLINE & p->ps->flags))
943 return;
944
945 if (TERMTYPE_PS != p->type) {
946 ps_printf(p, ") Tj\nET\n");
947 } else
948 ps_printf(p, ") show\n");
949
950 p->ps->flags &= ~PS_INLINE;
951 }
952
953 static void
954 ps_fclose(struct termp *p)
955 {
956
957 /*
958 * Strong closure: if we have a last-char, spit it out after
959 * checking that we're in the right font mode. This will of
960 * course open a new scope, if applicable.
961 *
962 * Following this, close out any scope that's open.
963 */
964
965 if ('\0' != p->ps->last) {
966 if (p->ps->lastf != TERMFONT_NONE) {
967 ps_pclose(p);
968 ps_setfont(p, TERMFONT_NONE);
969 }
970 ps_pletter(p, p->ps->last);
971 p->ps->last = '\0';
972 }
973
974 if ( ! (PS_INLINE & p->ps->flags))
975 return;
976
977 ps_pclose(p);
978 }
979
980 static void
981 ps_letter(struct termp *p, int arg)
982 {
983 char cc, c;
984
985 c = arg >= 128 || arg <= 0 ? '?' : arg;
986
987 /*
988 * State machine dictates whether to buffer the last character
989 * or not. Basically, encoded words are detected by checking if
990 * we're an "8" and switching on the buffer. Then we put "8" in
991 * our buffer, and on the next charater, flush both character
992 * and buffer. Thus, "regular" words are detected by having a
993 * regular character and a regular buffer character.
994 */
995
996 if ('\0' == p->ps->last) {
997 assert(8 != c);
998 p->ps->last = c;
999 return;
1000 } else if (8 == p->ps->last) {
1001 assert(8 != c);
1002 p->ps->last = '\0';
1003 } else if (8 == c) {
1004 assert(8 != p->ps->last);
1005 if ('_' == p->ps->last) {
1006 if (p->ps->lastf != TERMFONT_UNDER) {
1007 ps_pclose(p);
1008 ps_setfont(p, TERMFONT_UNDER);
1009 }
1010 } else if (p->ps->lastf != TERMFONT_BOLD) {
1011 ps_pclose(p);
1012 ps_setfont(p, TERMFONT_BOLD);
1013 }
1014 p->ps->last = c;
1015 return;
1016 } else {
1017 if (p->ps->lastf != TERMFONT_NONE) {
1018 ps_pclose(p);
1019 ps_setfont(p, TERMFONT_NONE);
1020 }
1021 cc = p->ps->last;
1022 p->ps->last = c;
1023 c = cc;
1024 }
1025
1026 ps_pletter(p, c);
1027 }
1028
1029 static void
1030 ps_advance(struct termp *p, size_t len)
1031 {
1032
1033 /*
1034 * Advance some spaces. This can probably be made smarter,
1035 * i.e., to have multiple space-separated words in the same
1036 * scope, but this is easier: just close out the current scope
1037 * and readjust our column settings.
1038 */
1039
1040 ps_fclose(p);
1041 p->ps->pscol += len;
1042 }
1043
1044 static void
1045 ps_endline(struct termp *p)
1046 {
1047
1048 /* Close out any scopes we have open: we're at eoln. */
1049
1050 ps_fclose(p);
1051
1052 /*
1053 * If we're in the margin, don't try to recalculate our current
1054 * row. XXX: if the column tries to be fancy with multiple
1055 * lines, we'll do nasty stuff.
1056 */
1057
1058 if (PS_MARGINS & p->ps->flags)
1059 return;
1060
1061 /* Left-justify. */
1062
1063 p->ps->pscol = p->ps->left;
1064
1065 /* If we haven't printed anything, return. */
1066
1067 if (PS_NEWPAGE & p->ps->flags)
1068 return;
1069
1070 /*
1071 * Put us down a line. If we're at the page bottom, spit out a
1072 * showpage and restart our row.
1073 */
1074
1075 if (p->ps->psrow >= p->ps->lineheight + p->ps->bottom) {
1076 p->ps->psrow -= p->ps->lineheight;
1077 return;
1078 }
1079
1080 ps_closepage(p);
1081 }
1082
1083 static void
1084 ps_setfont(struct termp *p, enum termfont f)
1085 {
1086
1087 assert(f < TERMFONT__MAX);
1088 p->ps->lastf = f;
1089
1090 /*
1091 * If we're still at the top of the page, let the font-setting
1092 * be delayed until we actually have stuff to print.
1093 */
1094
1095 if (PS_NEWPAGE & p->ps->flags)
1096 return;
1097
1098 if (TERMTYPE_PS == p->type)
1099 ps_printf(p, "/%s %zu selectfont\n",
1100 fonts[(int)f].name, p->ps->scale);
1101 else
1102 ps_printf(p, "/F%d %zu Tf\n",
1103 (int)f, p->ps->scale);
1104 }
1105
1106 static size_t
1107 ps_width(const struct termp *p, int c)
1108 {
1109
1110 if (c <= 32 || c - 32 >= MAXCHAR)
1111 return((size_t)fonts[(int)TERMFONT_NONE].gly[0].wx);
1112
1113 c -= 32;
1114 return((size_t)fonts[(int)TERMFONT_NONE].gly[c].wx);
1115 }
1116
1117 static double
1118 ps_hspan(const struct termp *p, const struct roffsu *su)
1119 {
1120 double r;
1121
1122 /*
1123 * All of these measurements are derived by converting from the
1124 * native measurement to AFM units.
1125 */
1126
1127 switch (su->unit) {
1128 case SCALE_CM:
1129 r = PNT2AFM(p, su->scale * 28.34);
1130 break;
1131 case SCALE_IN:
1132 r = PNT2AFM(p, su->scale * 72);
1133 break;
1134 case SCALE_PC:
1135 r = PNT2AFM(p, su->scale * 12);
1136 break;
1137 case SCALE_PT:
1138 r = PNT2AFM(p, su->scale * 100);
1139 break;
1140 case SCALE_EM:
1141 r = su->scale *
1142 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx;
1143 break;
1144 case SCALE_MM:
1145 r = PNT2AFM(p, su->scale * 2.834);
1146 break;
1147 case SCALE_EN:
1148 r = su->scale *
1149 fonts[(int)TERMFONT_NONE].gly[110 - 32].wx;
1150 break;
1151 case SCALE_VS:
1152 r = su->scale * p->ps->lineheight;
1153 break;
1154 default:
1155 r = su->scale;
1156 break;
1157 }
1158
1159 return(r);
1160 }
1161
1162 static void
1163 ps_growbuf(struct termp *p, size_t sz)
1164 {
1165 if (p->ps->psmargcur + sz <= p->ps->psmargsz)
1166 return;
1167
1168 if (sz < PS_BUFSLOP)
1169 sz = PS_BUFSLOP;
1170
1171 p->ps->psmargsz += sz;
1172
1173 p->ps->psmarg = mandoc_realloc
1174 (p->ps->psmarg, p->ps->psmargsz);
1175 }
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