1 /* $Id: term_ps.c,v 1.54 2011/10/16 12:20:34 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 }
492
493 /*
494 * This MUST be defined before any PNT2AFM or AFM2PNT
495 * calculations occur.
496 */
497
498 p->ps->scale = 11;
499
500 /* Remember millimetres -> AFM units. */
501
502 pagex = PNT2AFM(p, ((double)pagex * 2.834));
503 pagey = PNT2AFM(p, ((double)pagey * 2.834));
504
505 /* Margins are 1/9 the page x and y. */
506
507 marginx = /* LINTED */
508 (size_t)((double)pagex / 9.0);
509 marginy = /* LINTED */
510 (size_t)((double)pagey / 9.0);
511
512 /* Line-height is 1.4em. */
513
514 lineheight = PNT2AFM(p, ((double)p->ps->scale * 1.4));
515
516 p->ps->width = (size_t)pagex;
517 p->ps->height = (size_t)pagey;
518 p->ps->header = pagey - (marginy / 2) - (lineheight / 2);
519 p->ps->top = pagey - marginy;
520 p->ps->footer = (marginy / 2) - (lineheight / 2);
521 p->ps->bottom = marginy;
522 p->ps->left = marginx;
523 p->ps->lineheight = lineheight;
524
525 p->defrmargin = pagex - (marginx * 2);
526 return(p);
527 }
528
529
530 void
531 pspdf_free(void *arg)
532 {
533 struct termp *p;
534
535 p = (struct termp *)arg;
536
537 if (p->ps->psmarg)
538 free(p->ps->psmarg);
539 if (p->ps->pdfobjs)
540 free(p->ps->pdfobjs);
541
542 free(p->ps);
543 term_free(p);
544 }
545
546
547 static void
548 ps_printf(struct termp *p, const char *fmt, ...)
549 {
550 va_list ap;
551 int pos, len;
552
553 va_start(ap, fmt);
554
555 /*
556 * If we're running in regular mode, then pipe directly into
557 * vprintf(). If we're processing margins, then push the data
558 * into our growable margin buffer.
559 */
560
561 if ( ! (PS_MARGINS & p->ps->flags)) {
562 len = vprintf(fmt, ap);
563 va_end(ap);
564 p->ps->pdfbytes += /* LINTED */
565 len < 0 ? 0 : (size_t)len;
566 return;
567 }
568
569 /*
570 * XXX: I assume that the in-margin print won't exceed
571 * PS_BUFSLOP (128 bytes), which is reasonable but still an
572 * assumption that will cause pukeage if it's not the case.
573 */
574
575 ps_growbuf(p, PS_BUFSLOP);
576
577 pos = (int)p->ps->psmargcur;
578 vsnprintf(&p->ps->psmarg[pos], PS_BUFSLOP, fmt, ap);
579
580 va_end(ap);
581
582 p->ps->psmargcur = strlen(p->ps->psmarg);
583 }
584
585
586 static void
587 ps_putchar(struct termp *p, char c)
588 {
589 int pos;
590
591 /* See ps_printf(). */
592
593 if ( ! (PS_MARGINS & p->ps->flags)) {
594 /* LINTED */
595 putchar(c);
596 p->ps->pdfbytes++;
597 return;
598 }
599
600 ps_growbuf(p, 2);
601
602 pos = (int)p->ps->psmargcur++;
603 p->ps->psmarg[pos++] = c;
604 p->ps->psmarg[pos] = '\0';
605 }
606
607
608 static void
609 pdf_obj(struct termp *p, size_t obj)
610 {
611
612 assert(obj > 0);
613
614 if ((obj - 1) >= p->ps->pdfobjsz) {
615 p->ps->pdfobjsz = obj + 128;
616 p->ps->pdfobjs = realloc
617 (p->ps->pdfobjs,
618 p->ps->pdfobjsz * sizeof(size_t));
619 if (NULL == p->ps->pdfobjs) {
620 perror(NULL);
621 exit((int)MANDOCLEVEL_SYSERR);
622 }
623 }
624
625 p->ps->pdfobjs[(int)obj - 1] = p->ps->pdfbytes;
626 ps_printf(p, "%zu 0 obj\n", obj);
627 }
628
629
630 static void
631 ps_closepage(struct termp *p)
632 {
633 int i;
634 size_t len, base;
635
636 /*
637 * Close out a page that we've already flushed to output. In
638 * PostScript, we simply note that the page must be showed. In
639 * PDF, we must now create the Length, Resource, and Page node
640 * for the page contents.
641 */
642
643 assert(p->ps->psmarg && p->ps->psmarg[0]);
644 ps_printf(p, "%s", p->ps->psmarg);
645
646 if (TERMTYPE_PS != p->type) {
647 ps_printf(p, "ET\n");
648
649 len = p->ps->pdfbytes - p->ps->pdflastpg;
650 base = p->ps->pages * 4 + p->ps->pdfbody;
651
652 ps_printf(p, "endstream\nendobj\n");
653
654 /* Length of content. */
655 pdf_obj(p, base + 1);
656 ps_printf(p, "%zu\nendobj\n", len);
657
658 /* Resource for content. */
659 pdf_obj(p, base + 2);
660 ps_printf(p, "<<\n/ProcSet [/PDF /Text]\n");
661 ps_printf(p, "/Font <<\n");
662 for (i = 0; i < (int)TERMFONT__MAX; i++)
663 ps_printf(p, "/F%d %d 0 R\n", i, 3 + i);
664 ps_printf(p, ">>\n>>\n");
665
666 /* Page node. */
667 pdf_obj(p, base + 3);
668 ps_printf(p, "<<\n");
669 ps_printf(p, "/Type /Page\n");
670 ps_printf(p, "/Parent 2 0 R\n");
671 ps_printf(p, "/Resources %zu 0 R\n", base + 2);
672 ps_printf(p, "/Contents %zu 0 R\n", base);
673 ps_printf(p, ">>\nendobj\n");
674 } else
675 ps_printf(p, "showpage\n");
676
677 p->ps->pages++;
678 p->ps->psrow = p->ps->top;
679 assert( ! (PS_NEWPAGE & p->ps->flags));
680 p->ps->flags |= PS_NEWPAGE;
681 }
682
683
684 /* ARGSUSED */
685 static void
686 ps_end(struct termp *p)
687 {
688 size_t i, xref, base;
689
690 /*
691 * At the end of the file, do one last showpage. This is the
692 * same behaviour as groff(1) and works for multiple pages as
693 * well as just one.
694 */
695
696 if ( ! (PS_NEWPAGE & p->ps->flags)) {
697 assert(0 == p->ps->flags);
698 assert('\0' == p->ps->last);
699 ps_closepage(p);
700 }
701
702 if (TERMTYPE_PS == p->type) {
703 ps_printf(p, "%%%%Trailer\n");
704 ps_printf(p, "%%%%Pages: %zu\n", p->ps->pages);
705 ps_printf(p, "%%%%EOF\n");
706 return;
707 }
708
709 pdf_obj(p, 2);
710 ps_printf(p, "<<\n/Type /Pages\n");
711 ps_printf(p, "/MediaBox [0 0 %zu %zu]\n",
712 (size_t)AFM2PNT(p, p->ps->width),
713 (size_t)AFM2PNT(p, p->ps->height));
714
715 ps_printf(p, "/Count %zu\n", p->ps->pages);
716 ps_printf(p, "/Kids [");
717
718 for (i = 0; i < p->ps->pages; i++)
719 ps_printf(p, " %zu 0 R", i * 4 +
720 p->ps->pdfbody + 3);
721
722 base = (p->ps->pages - 1) * 4 +
723 p->ps->pdfbody + 4;
724
725 ps_printf(p, "]\n>>\nendobj\n");
726 pdf_obj(p, base);
727 ps_printf(p, "<<\n");
728 ps_printf(p, "/Type /Catalog\n");
729 ps_printf(p, "/Pages 2 0 R\n");
730 ps_printf(p, ">>\n");
731 xref = p->ps->pdfbytes;
732 ps_printf(p, "xref\n");
733 ps_printf(p, "0 %zu\n", base + 1);
734 ps_printf(p, "0000000000 65535 f \n");
735
736 for (i = 0; i < base; i++)
737 ps_printf(p, "%.10zu 00000 n \n",
738 p->ps->pdfobjs[(int)i]);
739
740 ps_printf(p, "trailer\n");
741 ps_printf(p, "<<\n");
742 ps_printf(p, "/Size %zu\n", base + 1);
743 ps_printf(p, "/Root %zu 0 R\n", base);
744 ps_printf(p, "/Info 1 0 R\n");
745 ps_printf(p, ">>\n");
746 ps_printf(p, "startxref\n");
747 ps_printf(p, "%zu\n", xref);
748 ps_printf(p, "%%%%EOF\n");
749 }
750
751
752 static void
753 ps_begin(struct termp *p)
754 {
755 time_t t;
756 int i;
757
758 /*
759 * Print margins into margin buffer. Nothing gets output to the
760 * screen yet, so we don't need to initialise the primary state.
761 */
762
763 if (p->ps->psmarg) {
764 assert(p->ps->psmargsz);
765 p->ps->psmarg[0] = '\0';
766 }
767
768 /*p->ps->pdfbytes = 0;*/
769 p->ps->psmargcur = 0;
770 p->ps->flags = PS_MARGINS;
771 p->ps->pscol = p->ps->left;
772 p->ps->psrow = p->ps->header;
773
774 ps_setfont(p, TERMFONT_NONE);
775
776 (*p->headf)(p, p->argf);
777 (*p->endline)(p);
778
779 p->ps->pscol = p->ps->left;
780 p->ps->psrow = p->ps->footer;
781
782 (*p->footf)(p, p->argf);
783 (*p->endline)(p);
784
785 p->ps->flags &= ~PS_MARGINS;
786
787 assert(0 == p->ps->flags);
788 assert(p->ps->psmarg);
789 assert('\0' != p->ps->psmarg[0]);
790
791 /*
792 * Print header and initialise page state. Following this,
793 * stuff gets printed to the screen, so make sure we're sane.
794 */
795
796 t = time(NULL);
797
798 if (TERMTYPE_PS == p->type) {
799 ps_printf(p, "%%!PS-Adobe-3.0\n");
800 ps_printf(p, "%%%%CreationDate: %s", ctime(&t));
801 ps_printf(p, "%%%%DocumentData: Clean7Bit\n");
802 ps_printf(p, "%%%%Orientation: Portrait\n");
803 ps_printf(p, "%%%%Pages: (atend)\n");
804 ps_printf(p, "%%%%PageOrder: Ascend\n");
805 ps_printf(p, "%%%%DocumentMedia: "
806 "Default %zu %zu 0 () ()\n",
807 (size_t)AFM2PNT(p, p->ps->width),
808 (size_t)AFM2PNT(p, p->ps->height));
809 ps_printf(p, "%%%%DocumentNeededResources: font");
810
811 for (i = 0; i < (int)TERMFONT__MAX; i++)
812 ps_printf(p, " %s", fonts[i].name);
813
814 ps_printf(p, "\n%%%%EndComments\n");
815 } else {
816 ps_printf(p, "%%PDF-1.1\n");
817 pdf_obj(p, 1);
818 ps_printf(p, "<<\n");
819 ps_printf(p, ">>\n");
820 ps_printf(p, "endobj\n");
821
822 for (i = 0; i < (int)TERMFONT__MAX; i++) {
823 pdf_obj(p, (size_t)i + 3);
824 ps_printf(p, "<<\n");
825 ps_printf(p, "/Type /Font\n");
826 ps_printf(p, "/Subtype /Type1\n");
827 ps_printf(p, "/Name /F%zu\n", i);
828 ps_printf(p, "/BaseFont /%s\n", fonts[i].name);
829 ps_printf(p, ">>\n");
830 }
831 }
832
833 p->ps->pdfbody = (size_t)TERMFONT__MAX + 3;
834 p->ps->pscol = p->ps->left;
835 p->ps->psrow = p->ps->top;
836 p->ps->flags |= PS_NEWPAGE;
837 ps_setfont(p, TERMFONT_NONE);
838 }
839
840
841 static void
842 ps_pletter(struct termp *p, int c)
843 {
844 int f;
845
846 /*
847 * If we haven't opened a page context, then output that we're
848 * in a new page and make sure the font is correctly set.
849 */
850
851 if (PS_NEWPAGE & p->ps->flags) {
852 if (TERMTYPE_PS == p->type) {
853 ps_printf(p, "%%%%Page: %zu %zu\n",
854 p->ps->pages + 1,
855 p->ps->pages + 1);
856 ps_printf(p, "/%s %zu selectfont\n",
857 fonts[(int)p->ps->lastf].name,
858 p->ps->scale);
859 } else {
860 pdf_obj(p, p->ps->pdfbody +
861 p->ps->pages * 4);
862 ps_printf(p, "<<\n");
863 ps_printf(p, "/Length %zu 0 R\n",
864 p->ps->pdfbody + 1 +
865 p->ps->pages * 4);
866 ps_printf(p, ">>\nstream\n");
867 }
868 p->ps->pdflastpg = p->ps->pdfbytes;
869 p->ps->flags &= ~PS_NEWPAGE;
870 }
871
872 /*
873 * If we're not in a PostScript "word" context, then open one
874 * now at the current cursor.
875 */
876
877 if ( ! (PS_INLINE & p->ps->flags)) {
878 if (TERMTYPE_PS != p->type) {
879 ps_printf(p, "BT\n/F%d %zu Tf\n",
880 (int)p->ps->lastf,
881 p->ps->scale);
882 ps_printf(p, "%.3f %.3f Td\n(",
883 AFM2PNT(p, p->ps->pscol),
884 AFM2PNT(p, p->ps->psrow));
885 } else
886 ps_printf(p, "%.3f %.3f moveto\n(",
887 AFM2PNT(p, p->ps->pscol),
888 AFM2PNT(p, p->ps->psrow));
889 p->ps->flags |= PS_INLINE;
890 }
891
892 assert( ! (PS_NEWPAGE & p->ps->flags));
893
894 /*
895 * We need to escape these characters as per the PostScript
896 * specification. We would also escape non-graphable characters
897 * (like tabs), but none of them would get to this point and
898 * it's superfluous to abort() on them.
899 */
900
901 switch (c) {
902 case ('('):
903 /* FALLTHROUGH */
904 case (')'):
905 /* FALLTHROUGH */
906 case ('\\'):
907 ps_putchar(p, '\\');
908 break;
909 default:
910 break;
911 }
912
913 /* Write the character and adjust where we are on the page. */
914
915 f = (int)p->ps->lastf;
916
917 if (c <= 32 || (c - 32 >= MAXCHAR)) {
918 ps_putchar(p, ' ');
919 p->ps->pscol += (size_t)fonts[f].gly[0].wx;
920 return;
921 }
922
923 ps_putchar(p, (char)c);
924 c -= 32;
925 p->ps->pscol += (size_t)fonts[f].gly[c].wx;
926 }
927
928
929 static void
930 ps_pclose(struct termp *p)
931 {
932
933 /*
934 * Spit out that we're exiting a word context (this is a
935 * "partial close" because we don't check the last-char buffer
936 * or anything).
937 */
938
939 if ( ! (PS_INLINE & p->ps->flags))
940 return;
941
942 if (TERMTYPE_PS != p->type) {
943 ps_printf(p, ") Tj\nET\n");
944 } else
945 ps_printf(p, ") show\n");
946
947 p->ps->flags &= ~PS_INLINE;
948 }
949
950
951 static void
952 ps_fclose(struct termp *p)
953 {
954
955 /*
956 * Strong closure: if we have a last-char, spit it out after
957 * checking that we're in the right font mode. This will of
958 * course open a new scope, if applicable.
959 *
960 * Following this, close out any scope that's open.
961 */
962
963 if ('\0' != p->ps->last) {
964 if (p->ps->lastf != TERMFONT_NONE) {
965 ps_pclose(p);
966 ps_setfont(p, TERMFONT_NONE);
967 }
968 ps_pletter(p, p->ps->last);
969 p->ps->last = '\0';
970 }
971
972 if ( ! (PS_INLINE & p->ps->flags))
973 return;
974
975 ps_pclose(p);
976 }
977
978
979 static void
980 ps_letter(struct termp *p, int arg)
981 {
982 char cc, c;
983
984 /* LINTED */
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
1030 static void
1031 ps_advance(struct termp *p, size_t len)
1032 {
1033
1034 /*
1035 * Advance some spaces. This can probably be made smarter,
1036 * i.e., to have multiple space-separated words in the same
1037 * scope, but this is easier: just close out the current scope
1038 * and readjust our column settings.
1039 */
1040
1041 ps_fclose(p);
1042 p->ps->pscol += len;
1043 }
1044
1045
1046 static void
1047 ps_endline(struct termp *p)
1048 {
1049
1050 /* Close out any scopes we have open: we're at eoln. */
1051
1052 ps_fclose(p);
1053
1054 /*
1055 * If we're in the margin, don't try to recalculate our current
1056 * row. XXX: if the column tries to be fancy with multiple
1057 * lines, we'll do nasty stuff.
1058 */
1059
1060 if (PS_MARGINS & p->ps->flags)
1061 return;
1062
1063 /* Left-justify. */
1064
1065 p->ps->pscol = p->ps->left;
1066
1067 /* If we haven't printed anything, return. */
1068
1069 if (PS_NEWPAGE & p->ps->flags)
1070 return;
1071
1072 /*
1073 * Put us down a line. If we're at the page bottom, spit out a
1074 * showpage and restart our row.
1075 */
1076
1077 if (p->ps->psrow >= p->ps->lineheight +
1078 p->ps->bottom) {
1079 p->ps->psrow -= p->ps->lineheight;
1080 return;
1081 }
1082
1083 ps_closepage(p);
1084 }
1085
1086
1087 static void
1088 ps_setfont(struct termp *p, enum termfont f)
1089 {
1090
1091 assert(f < TERMFONT__MAX);
1092 p->ps->lastf = f;
1093
1094 /*
1095 * If we're still at the top of the page, let the font-setting
1096 * be delayed until we actually have stuff to print.
1097 */
1098
1099 if (PS_NEWPAGE & p->ps->flags)
1100 return;
1101
1102 if (TERMTYPE_PS == p->type)
1103 ps_printf(p, "/%s %zu selectfont\n",
1104 fonts[(int)f].name,
1105 p->ps->scale);
1106 else
1107 ps_printf(p, "/F%d %zu Tf\n",
1108 (int)f,
1109 p->ps->scale);
1110 }
1111
1112
1113 /* ARGSUSED */
1114 static size_t
1115 ps_width(const struct termp *p, int c)
1116 {
1117
1118 if (c <= 32 || c - 32 >= MAXCHAR)
1119 return((size_t)fonts[(int)TERMFONT_NONE].gly[0].wx);
1120
1121 c -= 32;
1122 return((size_t)fonts[(int)TERMFONT_NONE].gly[c].wx);
1123 }
1124
1125
1126 static double
1127 ps_hspan(const struct termp *p, const struct roffsu *su)
1128 {
1129 double r;
1130
1131 /*
1132 * All of these measurements are derived by converting from the
1133 * native measurement to AFM units.
1134 */
1135
1136 switch (su->unit) {
1137 case (SCALE_CM):
1138 r = PNT2AFM(p, su->scale * 28.34);
1139 break;
1140 case (SCALE_IN):
1141 r = PNT2AFM(p, su->scale * 72);
1142 break;
1143 case (SCALE_PC):
1144 r = PNT2AFM(p, su->scale * 12);
1145 break;
1146 case (SCALE_PT):
1147 r = PNT2AFM(p, su->scale * 100);
1148 break;
1149 case (SCALE_EM):
1150 r = su->scale *
1151 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx;
1152 break;
1153 case (SCALE_MM):
1154 r = PNT2AFM(p, su->scale * 2.834);
1155 break;
1156 case (SCALE_EN):
1157 r = su->scale *
1158 fonts[(int)TERMFONT_NONE].gly[110 - 32].wx;
1159 break;
1160 case (SCALE_VS):
1161 r = su->scale * p->ps->lineheight;
1162 break;
1163 default:
1164 r = su->scale;
1165 break;
1166 }
1167
1168 return(r);
1169 }
1170
1171 static void
1172 ps_growbuf(struct termp *p, size_t sz)
1173 {
1174 if (p->ps->psmargcur + sz <= p->ps->psmargsz)
1175 return;
1176
1177 if (sz < PS_BUFSLOP)
1178 sz = PS_BUFSLOP;
1179
1180 p->ps->psmargsz += sz;
1181
1182 p->ps->psmarg = mandoc_realloc
1183 (p->ps->psmarg, p->ps->psmargsz);
1184 }
1185