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1 /* $Id: term_ps.c,v 1.50 2011/05/15 00:58:48 kristaps Exp $ */
2 /*
3 * Copyright (c) 2010 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 size_t pagex, pagey, marginx, marginy, lineheight;
433 const char *toks[2];
434 const char *pp;
435 char *v;
436
437 p = term_alloc(TERMENC_ASCII);
438 p->ps = mandoc_calloc(1, sizeof(struct termp_ps));
439
440 p->advance = ps_advance;
441 p->begin = ps_begin;
442 p->end = ps_end;
443 p->endline = ps_endline;
444 p->hspan = ps_hspan;
445 p->letter = ps_letter;
446 p->width = ps_width;
447
448 toks[0] = "paper";
449 toks[1] = NULL;
450
451 pp = NULL;
452
453 while (outopts && *outopts)
454 switch (getsubopt(&outopts, UNCONST(toks), &v)) {
455 case (0):
456 pp = v;
457 break;
458 default:
459 break;
460 }
461
462 /* Default to US letter (millimetres). */
463
464 pagex = 216;
465 pagey = 279;
466
467 /*
468 * The ISO-269 paper sizes can be calculated automatically, but
469 * it would require bringing in -lm for pow() and I'd rather not
470 * do that. So just do it the easy way for now. Since this
471 * only happens once, I'm not terribly concerned.
472 */
473
474 if (pp && strcasecmp(pp, "letter")) {
475 if (0 == strcasecmp(pp, "a3")) {
476 pagex = 297;
477 pagey = 420;
478 } else if (0 == strcasecmp(pp, "a4")) {
479 pagex = 210;
480 pagey = 297;
481 } else if (0 == strcasecmp(pp, "a5")) {
482 pagex = 148;
483 pagey = 210;
484 } else if (0 == strcasecmp(pp, "legal")) {
485 pagex = 216;
486 pagey = 356;
487 } else if (2 != sscanf(pp, "%zux%zu", &pagex, &pagey))
488 fprintf(stderr, "%s: Unknown paper\n", pp);
489 } else if (NULL == pp)
490 pp = "letter";
491
492 /*
493 * This MUST be defined before any PNT2AFM or AFM2PNT
494 * calculations occur.
495 */
496
497 p->ps->scale = 11;
498
499 /* Remember millimetres -> AFM units. */
500
501 pagex = PNT2AFM(p, ((double)pagex * 2.834));
502 pagey = PNT2AFM(p, ((double)pagey * 2.834));
503
504 /* Margins are 1/9 the page x and y. */
505
506 marginx = /* LINTED */
507 (size_t)((double)pagex / 9.0);
508 marginy = /* LINTED */
509 (size_t)((double)pagey / 9.0);
510
511 /* Line-height is 1.4em. */
512
513 lineheight = PNT2AFM(p, ((double)p->ps->scale * 1.4));
514
515 p->ps->width = pagex;
516 p->ps->height = pagey;
517 p->ps->header = pagey - (marginy / 2) - (lineheight / 2);
518 p->ps->top = pagey - marginy;
519 p->ps->footer = (marginy / 2) - (lineheight / 2);
520 p->ps->bottom = marginy;
521 p->ps->left = marginx;
522 p->ps->lineheight = lineheight;
523
524 p->defrmargin = pagex - (marginx * 2);
525 return(p);
526 }
527
528
529 void
530 pspdf_free(void *arg)
531 {
532 struct termp *p;
533
534 p = (struct termp *)arg;
535
536 if (p->ps->psmarg)
537 free(p->ps->psmarg);
538 if (p->ps->pdfobjs)
539 free(p->ps->pdfobjs);
540
541 free(p->ps);
542 term_free(p);
543 }
544
545
546 static void
547 ps_printf(struct termp *p, const char *fmt, ...)
548 {
549 va_list ap;
550 int pos, len;
551
552 va_start(ap, fmt);
553
554 /*
555 * If we're running in regular mode, then pipe directly into
556 * vprintf(). If we're processing margins, then push the data
557 * into our growable margin buffer.
558 */
559
560 if ( ! (PS_MARGINS & p->ps->flags)) {
561 len = vprintf(fmt, ap);
562 va_end(ap);
563 p->ps->pdfbytes += /* LINTED */
564 len < 0 ? 0 : (size_t)len;
565 return;
566 }
567
568 /*
569 * XXX: I assume that the in-margin print won't exceed
570 * PS_BUFSLOP (128 bytes), which is reasonable but still an
571 * assumption that will cause pukeage if it's not the case.
572 */
573
574 ps_growbuf(p, PS_BUFSLOP);
575
576 pos = (int)p->ps->psmargcur;
577 len = vsnprintf(&p->ps->psmarg[pos], PS_BUFSLOP, fmt, ap);
578
579 va_end(ap);
580
581 p->ps->psmargcur = strlen(p->ps->psmarg);
582 }
583
584
585 static void
586 ps_putchar(struct termp *p, char c)
587 {
588 int pos;
589
590 /* See ps_printf(). */
591
592 if ( ! (PS_MARGINS & p->ps->flags)) {
593 /* LINTED */
594 putchar(c);
595 p->ps->pdfbytes++;
596 return;
597 }
598
599 ps_growbuf(p, 2);
600
601 pos = (int)p->ps->psmargcur++;
602 p->ps->psmarg[pos++] = c;
603 p->ps->psmarg[pos] = '\0';
604 }
605
606
607 static void
608 pdf_obj(struct termp *p, size_t obj)
609 {
610
611 assert(obj > 0);
612
613 if ((obj - 1) >= p->ps->pdfobjsz) {
614 p->ps->pdfobjsz = obj + 128;
615 p->ps->pdfobjs = realloc
616 (p->ps->pdfobjs,
617 p->ps->pdfobjsz * sizeof(size_t));
618 if (NULL == p->ps->pdfobjs) {
619 perror(NULL);
620 exit((int)MANDOCLEVEL_SYSERR);
621 }
622 }
623
624 p->ps->pdfobjs[(int)obj - 1] = p->ps->pdfbytes;
625 ps_printf(p, "%zu 0 obj\n", obj);
626 }
627
628
629 static void
630 ps_closepage(struct termp *p)
631 {
632 int i;
633 size_t len, base;
634
635 /*
636 * Close out a page that we've already flushed to output. In
637 * PostScript, we simply note that the page must be showed. In
638 * PDF, we must now create the Length, Resource, and Page node
639 * for the page contents.
640 */
641
642 assert(p->ps->psmarg && p->ps->psmarg[0]);
643 ps_printf(p, "%s", p->ps->psmarg);
644
645 if (TERMTYPE_PS != p->type) {
646 ps_printf(p, "ET\n");
647
648 len = p->ps->pdfbytes - p->ps->pdflastpg;
649 base = p->ps->pages * 4 + p->ps->pdfbody;
650
651 ps_printf(p, "endstream\nendobj\n");
652
653 /* Length of content. */
654 pdf_obj(p, base + 1);
655 ps_printf(p, "%zu\nendobj\n", len);
656
657 /* Resource for content. */
658 pdf_obj(p, base + 2);
659 ps_printf(p, "<<\n/ProcSet [/PDF /Text]\n");
660 ps_printf(p, "/Font <<\n");
661 for (i = 0; i < (int)TERMFONT__MAX; i++)
662 ps_printf(p, "/F%d %d 0 R\n", i, 3 + i);
663 ps_printf(p, ">>\n>>\n");
664
665 /* Page node. */
666 pdf_obj(p, base + 3);
667 ps_printf(p, "<<\n");
668 ps_printf(p, "/Type /Page\n");
669 ps_printf(p, "/Parent 2 0 R\n");
670 ps_printf(p, "/Resources %zu 0 R\n", base + 2);
671 ps_printf(p, "/Contents %zu 0 R\n", base);
672 ps_printf(p, ">>\nendobj\n");
673 } else
674 ps_printf(p, "showpage\n");
675
676 p->ps->pages++;
677 p->ps->psrow = p->ps->top;
678 assert( ! (PS_NEWPAGE & p->ps->flags));
679 p->ps->flags |= PS_NEWPAGE;
680 }
681
682
683 /* ARGSUSED */
684 static void
685 ps_end(struct termp *p)
686 {
687 size_t i, xref, base;
688
689 /*
690 * At the end of the file, do one last showpage. This is the
691 * same behaviour as groff(1) and works for multiple pages as
692 * well as just one.
693 */
694
695 if ( ! (PS_NEWPAGE & p->ps->flags)) {
696 assert(0 == p->ps->flags);
697 assert('\0' == p->ps->last);
698 ps_closepage(p);
699 }
700
701 if (TERMTYPE_PS == p->type) {
702 ps_printf(p, "%%%%Trailer\n");
703 ps_printf(p, "%%%%Pages: %zu\n", p->ps->pages);
704 ps_printf(p, "%%%%EOF\n");
705 return;
706 }
707
708 pdf_obj(p, 2);
709 ps_printf(p, "<<\n/Type /Pages\n");
710 ps_printf(p, "/MediaBox [0 0 %zu %zu]\n",
711 (size_t)AFM2PNT(p, p->ps->width),
712 (size_t)AFM2PNT(p, p->ps->height));
713
714 ps_printf(p, "/Count %zu\n", p->ps->pages);
715 ps_printf(p, "/Kids [");
716
717 for (i = 0; i < p->ps->pages; i++)
718 ps_printf(p, " %zu 0 R", i * 4 +
719 p->ps->pdfbody + 3);
720
721 base = (p->ps->pages - 1) * 4 +
722 p->ps->pdfbody + 4;
723
724 ps_printf(p, "]\n>>\nendobj\n");
725 pdf_obj(p, base);
726 ps_printf(p, "<<\n");
727 ps_printf(p, "/Type /Catalog\n");
728 ps_printf(p, "/Pages 2 0 R\n");
729 ps_printf(p, ">>\n");
730 xref = p->ps->pdfbytes;
731 ps_printf(p, "xref\n");
732 ps_printf(p, "0 %zu\n", base + 1);
733 ps_printf(p, "0000000000 65535 f \n");
734
735 for (i = 0; i < base; i++)
736 ps_printf(p, "%.10zu 00000 n \n",
737 p->ps->pdfobjs[(int)i]);
738
739 ps_printf(p, "trailer\n");
740 ps_printf(p, "<<\n");
741 ps_printf(p, "/Size %zu\n", base + 1);
742 ps_printf(p, "/Root %zu 0 R\n", base);
743 ps_printf(p, "/Info 1 0 R\n");
744 ps_printf(p, ">>\n");
745 ps_printf(p, "startxref\n");
746 ps_printf(p, "%zu\n", xref);
747 ps_printf(p, "%%%%EOF\n");
748 }
749
750
751 static void
752 ps_begin(struct termp *p)
753 {
754 time_t t;
755 int i;
756
757 /*
758 * Print margins into margin buffer. Nothing gets output to the
759 * screen yet, so we don't need to initialise the primary state.
760 */
761
762 if (p->ps->psmarg) {
763 assert(p->ps->psmargsz);
764 p->ps->psmarg[0] = '\0';
765 }
766
767 /*p->ps->pdfbytes = 0;*/
768 p->ps->psmargcur = 0;
769 p->ps->flags = PS_MARGINS;
770 p->ps->pscol = p->ps->left;
771 p->ps->psrow = p->ps->header;
772
773 ps_setfont(p, TERMFONT_NONE);
774
775 (*p->headf)(p, p->argf);
776 (*p->endline)(p);
777
778 p->ps->pscol = p->ps->left;
779 p->ps->psrow = p->ps->footer;
780
781 (*p->footf)(p, p->argf);
782 (*p->endline)(p);
783
784 p->ps->flags &= ~PS_MARGINS;
785
786 assert(0 == p->ps->flags);
787 assert(p->ps->psmarg);
788 assert('\0' != p->ps->psmarg[0]);
789
790 /*
791 * Print header and initialise page state. Following this,
792 * stuff gets printed to the screen, so make sure we're sane.
793 */
794
795 t = time(NULL);
796
797 if (TERMTYPE_PS == p->type) {
798 ps_printf(p, "%%!PS-Adobe-3.0\n");
799 ps_printf(p, "%%%%CreationDate: %s", ctime(&t));
800 ps_printf(p, "%%%%DocumentData: Clean7Bit\n");
801 ps_printf(p, "%%%%Orientation: Portrait\n");
802 ps_printf(p, "%%%%Pages: (atend)\n");
803 ps_printf(p, "%%%%PageOrder: Ascend\n");
804 ps_printf(p, "%%%%DocumentMedia: "
805 "Default %zu %zu 0 () ()\n",
806 (size_t)AFM2PNT(p, p->ps->width),
807 (size_t)AFM2PNT(p, p->ps->height));
808 ps_printf(p, "%%%%DocumentNeededResources: font");
809
810 for (i = 0; i < (int)TERMFONT__MAX; i++)
811 ps_printf(p, " %s", fonts[i].name);
812
813 ps_printf(p, "\n%%%%EndComments\n");
814 } else {
815 ps_printf(p, "%%PDF-1.1\n");
816 pdf_obj(p, 1);
817 ps_printf(p, "<<\n");
818 ps_printf(p, ">>\n");
819 ps_printf(p, "endobj\n");
820
821 for (i = 0; i < (int)TERMFONT__MAX; i++) {
822 pdf_obj(p, (size_t)i + 3);
823 ps_printf(p, "<<\n");
824 ps_printf(p, "/Type /Font\n");
825 ps_printf(p, "/Subtype /Type1\n");
826 ps_printf(p, "/Name /F%zu\n", i);
827 ps_printf(p, "/BaseFont /%s\n", fonts[i].name);
828 ps_printf(p, ">>\n");
829 }
830 }
831
832 p->ps->pdfbody = (size_t)TERMFONT__MAX + 3;
833 p->ps->pscol = p->ps->left;
834 p->ps->psrow = p->ps->top;
835 p->ps->flags |= PS_NEWPAGE;
836 ps_setfont(p, TERMFONT_NONE);
837 }
838
839
840 static void
841 ps_pletter(struct termp *p, int c)
842 {
843 int f;
844
845 /*
846 * If we haven't opened a page context, then output that we're
847 * in a new page and make sure the font is correctly set.
848 */
849
850 if (PS_NEWPAGE & p->ps->flags) {
851 if (TERMTYPE_PS == p->type) {
852 ps_printf(p, "%%%%Page: %zu %zu\n",
853 p->ps->pages + 1,
854 p->ps->pages + 1);
855 ps_printf(p, "/%s %zu selectfont\n",
856 fonts[(int)p->ps->lastf].name,
857 p->ps->scale);
858 } else {
859 pdf_obj(p, p->ps->pdfbody +
860 p->ps->pages * 4);
861 ps_printf(p, "<<\n");
862 ps_printf(p, "/Length %zu 0 R\n",
863 p->ps->pdfbody + 1 +
864 p->ps->pages * 4);
865 ps_printf(p, ">>\nstream\n");
866 }
867 p->ps->pdflastpg = p->ps->pdfbytes;
868 p->ps->flags &= ~PS_NEWPAGE;
869 }
870
871 /*
872 * If we're not in a PostScript "word" context, then open one
873 * now at the current cursor.
874 */
875
876 if ( ! (PS_INLINE & p->ps->flags)) {
877 if (TERMTYPE_PS != p->type) {
878 ps_printf(p, "BT\n/F%d %zu Tf\n",
879 (int)p->ps->lastf,
880 p->ps->scale);
881 ps_printf(p, "%.3f %.3f Td\n(",
882 AFM2PNT(p, p->ps->pscol),
883 AFM2PNT(p, p->ps->psrow));
884 } else
885 ps_printf(p, "%.3f %.3f moveto\n(",
886 AFM2PNT(p, p->ps->pscol),
887 AFM2PNT(p, p->ps->psrow));
888 p->ps->flags |= PS_INLINE;
889 }
890
891 assert( ! (PS_NEWPAGE & p->ps->flags));
892
893 /*
894 * We need to escape these characters as per the PostScript
895 * specification. We would also escape non-graphable characters
896 * (like tabs), but none of them would get to this point and
897 * it's superfluous to abort() on them.
898 */
899
900 switch (c) {
901 case ('('):
902 /* FALLTHROUGH */
903 case (')'):
904 /* FALLTHROUGH */
905 case ('\\'):
906 ps_putchar(p, '\\');
907 break;
908 default:
909 break;
910 }
911
912 /* Write the character and adjust where we are on the page. */
913
914 f = (int)p->ps->lastf;
915
916 if (c <= 32 || (c - 32 >= MAXCHAR)) {
917 ps_putchar(p, ' ');
918 p->ps->pscol += (size_t)fonts[f].gly[0].wx;
919 return;
920 }
921
922 ps_putchar(p, (char)c);
923 c -= 32;
924 p->ps->pscol += (size_t)fonts[f].gly[c].wx;
925 }
926
927
928 static void
929 ps_pclose(struct termp *p)
930 {
931
932 /*
933 * Spit out that we're exiting a word context (this is a
934 * "partial close" because we don't check the last-char buffer
935 * or anything).
936 */
937
938 if ( ! (PS_INLINE & p->ps->flags))
939 return;
940
941 if (TERMTYPE_PS != p->type) {
942 ps_printf(p, ") Tj\nET\n");
943 } else
944 ps_printf(p, ") show\n");
945
946 p->ps->flags &= ~PS_INLINE;
947 }
948
949
950 static void
951 ps_fclose(struct termp *p)
952 {
953
954 /*
955 * Strong closure: if we have a last-char, spit it out after
956 * checking that we're in the right font mode. This will of
957 * course open a new scope, if applicable.
958 *
959 * Following this, close out any scope that's open.
960 */
961
962 if ('\0' != p->ps->last) {
963 if (p->ps->lastf != TERMFONT_NONE) {
964 ps_pclose(p);
965 ps_setfont(p, TERMFONT_NONE);
966 }
967 ps_pletter(p, p->ps->last);
968 p->ps->last = '\0';
969 }
970
971 if ( ! (PS_INLINE & p->ps->flags))
972 return;
973
974 ps_pclose(p);
975 }
976
977
978 static void
979 ps_letter(struct termp *p, int arg)
980 {
981 char cc, c;
982
983 /* LINTED */
984 c = arg >= 128 || arg <= 0 ? '?' : arg;
985
986 /*
987 * State machine dictates whether to buffer the last character
988 * or not. Basically, encoded words are detected by checking if
989 * we're an "8" and switching on the buffer. Then we put "8" in
990 * our buffer, and on the next charater, flush both character
991 * and buffer. Thus, "regular" words are detected by having a
992 * regular character and a regular buffer character.
993 */
994
995 if ('\0' == p->ps->last) {
996 assert(8 != c);
997 p->ps->last = c;
998 return;
999 } else if (8 == p->ps->last) {
1000 assert(8 != c);
1001 p->ps->last = '\0';
1002 } else if (8 == c) {
1003 assert(8 != p->ps->last);
1004 if ('_' == p->ps->last) {
1005 if (p->ps->lastf != TERMFONT_UNDER) {
1006 ps_pclose(p);
1007 ps_setfont(p, TERMFONT_UNDER);
1008 }
1009 } else if (p->ps->lastf != TERMFONT_BOLD) {
1010 ps_pclose(p);
1011 ps_setfont(p, TERMFONT_BOLD);
1012 }
1013 p->ps->last = c;
1014 return;
1015 } else {
1016 if (p->ps->lastf != TERMFONT_NONE) {
1017 ps_pclose(p);
1018 ps_setfont(p, TERMFONT_NONE);
1019 }
1020 cc = p->ps->last;
1021 p->ps->last = c;
1022 c = cc;
1023 }
1024
1025 ps_pletter(p, c);
1026 }
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
1045 static void
1046 ps_endline(struct termp *p)
1047 {
1048
1049 /* Close out any scopes we have open: we're at eoln. */
1050
1051 ps_fclose(p);
1052
1053 /*
1054 * If we're in the margin, don't try to recalculate our current
1055 * row. XXX: if the column tries to be fancy with multiple
1056 * lines, we'll do nasty stuff.
1057 */
1058
1059 if (PS_MARGINS & p->ps->flags)
1060 return;
1061
1062 /* Left-justify. */
1063
1064 p->ps->pscol = p->ps->left;
1065
1066 /* If we haven't printed anything, return. */
1067
1068 if (PS_NEWPAGE & p->ps->flags)
1069 return;
1070
1071 /*
1072 * Put us down a line. If we're at the page bottom, spit out a
1073 * showpage and restart our row.
1074 */
1075
1076 if (p->ps->psrow >= p->ps->lineheight +
1077 p->ps->bottom) {
1078 p->ps->psrow -= p->ps->lineheight;
1079 return;
1080 }
1081
1082 ps_closepage(p);
1083 }
1084
1085
1086 static void
1087 ps_setfont(struct termp *p, enum termfont f)
1088 {
1089
1090 assert(f < TERMFONT__MAX);
1091 p->ps->lastf = f;
1092
1093 /*
1094 * If we're still at the top of the page, let the font-setting
1095 * be delayed until we actually have stuff to print.
1096 */
1097
1098 if (PS_NEWPAGE & p->ps->flags)
1099 return;
1100
1101 if (TERMTYPE_PS == p->type)
1102 ps_printf(p, "/%s %zu selectfont\n",
1103 fonts[(int)f].name,
1104 p->ps->scale);
1105 else
1106 ps_printf(p, "/F%d %zu Tf\n",
1107 (int)f,
1108 p->ps->scale);
1109 }
1110
1111
1112 /* ARGSUSED */
1113 static size_t
1114 ps_width(const struct termp *p, int c)
1115 {
1116
1117 if (c <= 32 || c - 32 >= MAXCHAR)
1118 return((size_t)fonts[(int)TERMFONT_NONE].gly[0].wx);
1119
1120 c -= 32;
1121 return((size_t)fonts[(int)TERMFONT_NONE].gly[c].wx);
1122 }
1123
1124
1125 static double
1126 ps_hspan(const struct termp *p, const struct roffsu *su)
1127 {
1128 double r;
1129
1130 /*
1131 * All of these measurements are derived by converting from the
1132 * native measurement to AFM units.
1133 */
1134
1135 switch (su->unit) {
1136 case (SCALE_CM):
1137 r = PNT2AFM(p, su->scale * 28.34);
1138 break;
1139 case (SCALE_IN):
1140 r = PNT2AFM(p, su->scale * 72);
1141 break;
1142 case (SCALE_PC):
1143 r = PNT2AFM(p, su->scale * 12);
1144 break;
1145 case (SCALE_PT):
1146 r = PNT2AFM(p, su->scale * 100);
1147 break;
1148 case (SCALE_EM):
1149 r = su->scale *
1150 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx;
1151 break;
1152 case (SCALE_MM):
1153 r = PNT2AFM(p, su->scale * 2.834);
1154 break;
1155 case (SCALE_EN):
1156 r = su->scale *
1157 fonts[(int)TERMFONT_NONE].gly[110 - 32].wx;
1158 break;
1159 case (SCALE_VS):
1160 r = su->scale * p->ps->lineheight;
1161 break;
1162 default:
1163 r = su->scale;
1164 break;
1165 }
1166
1167 return(r);
1168 }
1169
1170 static void
1171 ps_growbuf(struct termp *p, size_t sz)
1172 {
1173 if (p->ps->psmargcur + sz <= p->ps->psmargsz)
1174 return;
1175
1176 if (sz < PS_BUFSLOP)
1177 sz = PS_BUFSLOP;
1178
1179 p->ps->psmargsz += sz;
1180
1181 p->ps->psmarg = mandoc_realloc
1182 (p->ps->psmarg, p->ps->psmargsz);
1183 }
1184