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[mandoc.git] / term_ps.c
1 /* $Id: term_ps.c,v 1.48 2011/03/17 08:49:34 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 /* Convert PostScript point "x" to an AFM unit. */
38 #define PNT2AFM(p, x) /* LINTED */ \
39 (size_t)((double)(x) * (1000.0 / (double)(p)->engine.ps.scale))
40
41 /* Convert an AFM unit "x" to a PostScript points */
42 #define AFM2PNT(p, x) /* LINTED */ \
43 ((double)(x) / (1000.0 / (double)(p)->engine.ps.scale))
44
45 struct glyph {
46 unsigned short wx; /* WX in AFM */
47 };
48
49 struct font {
50 const char *name; /* FontName in AFM */
51 #define MAXCHAR 95 /* total characters we can handle */
52 struct glyph gly[MAXCHAR]; /* glyph metrics */
53 };
54
55 /*
56 * We define, for the time being, three fonts: bold, oblique/italic, and
57 * normal (roman). The following table hard-codes the font metrics for
58 * ASCII, i.e., 32--127.
59 */
60
61 static const struct font fonts[TERMFONT__MAX] = {
62 { "Times-Roman", {
63 { 250 },
64 { 333 },
65 { 408 },
66 { 500 },
67 { 500 },
68 { 833 },
69 { 778 },
70 { 333 },
71 { 333 },
72 { 333 },
73 { 500 },
74 { 564 },
75 { 250 },
76 { 333 },
77 { 250 },
78 { 278 },
79 { 500 },
80 { 500 },
81 { 500 },
82 { 500 },
83 { 500 },
84 { 500 },
85 { 500 },
86 { 500 },
87 { 500 },
88 { 500 },
89 { 278 },
90 { 278 },
91 { 564 },
92 { 564 },
93 { 564 },
94 { 444 },
95 { 921 },
96 { 722 },
97 { 667 },
98 { 667 },
99 { 722 },
100 { 611 },
101 { 556 },
102 { 722 },
103 { 722 },
104 { 333 },
105 { 389 },
106 { 722 },
107 { 611 },
108 { 889 },
109 { 722 },
110 { 722 },
111 { 556 },
112 { 722 },
113 { 667 },
114 { 556 },
115 { 611 },
116 { 722 },
117 { 722 },
118 { 944 },
119 { 722 },
120 { 722 },
121 { 611 },
122 { 333 },
123 { 278 },
124 { 333 },
125 { 469 },
126 { 500 },
127 { 333 },
128 { 444 },
129 { 500 },
130 { 444 },
131 { 500},
132 { 444},
133 { 333},
134 { 500},
135 { 500},
136 { 278},
137 { 278},
138 { 500},
139 { 278},
140 { 778},
141 { 500},
142 { 500},
143 { 500},
144 { 500},
145 { 333},
146 { 389},
147 { 278},
148 { 500},
149 { 500},
150 { 722},
151 { 500},
152 { 500},
153 { 444},
154 { 480},
155 { 200},
156 { 480},
157 { 541},
158 } },
159 { "Times-Bold", {
160 { 250 },
161 { 333 },
162 { 555 },
163 { 500 },
164 { 500 },
165 { 1000 },
166 { 833 },
167 { 333 },
168 { 333 },
169 { 333 },
170 { 500 },
171 { 570 },
172 { 250 },
173 { 333 },
174 { 250 },
175 { 278 },
176 { 500 },
177 { 500 },
178 { 500 },
179 { 500 },
180 { 500 },
181 { 500 },
182 { 500 },
183 { 500 },
184 { 500 },
185 { 500 },
186 { 333 },
187 { 333 },
188 { 570 },
189 { 570 },
190 { 570 },
191 { 500 },
192 { 930 },
193 { 722 },
194 { 667 },
195 { 722 },
196 { 722 },
197 { 667 },
198 { 611 },
199 { 778 },
200 { 778 },
201 { 389 },
202 { 500 },
203 { 778 },
204 { 667 },
205 { 944 },
206 { 722 },
207 { 778 },
208 { 611 },
209 { 778 },
210 { 722 },
211 { 556 },
212 { 667 },
213 { 722 },
214 { 722 },
215 { 1000 },
216 { 722 },
217 { 722 },
218 { 667 },
219 { 333 },
220 { 278 },
221 { 333 },
222 { 581 },
223 { 500 },
224 { 333 },
225 { 500 },
226 { 556 },
227 { 444 },
228 { 556 },
229 { 444 },
230 { 333 },
231 { 500 },
232 { 556 },
233 { 278 },
234 { 333 },
235 { 556 },
236 { 278 },
237 { 833 },
238 { 556 },
239 { 500 },
240 { 556 },
241 { 556 },
242 { 444 },
243 { 389 },
244 { 333 },
245 { 556 },
246 { 500 },
247 { 722 },
248 { 500 },
249 { 500 },
250 { 444 },
251 { 394 },
252 { 220 },
253 { 394 },
254 { 520 },
255 } },
256 { "Times-Italic", {
257 { 250 },
258 { 333 },
259 { 420 },
260 { 500 },
261 { 500 },
262 { 833 },
263 { 778 },
264 { 333 },
265 { 333 },
266 { 333 },
267 { 500 },
268 { 675 },
269 { 250 },
270 { 333 },
271 { 250 },
272 { 278 },
273 { 500 },
274 { 500 },
275 { 500 },
276 { 500 },
277 { 500 },
278 { 500 },
279 { 500 },
280 { 500 },
281 { 500 },
282 { 500 },
283 { 333 },
284 { 333 },
285 { 675 },
286 { 675 },
287 { 675 },
288 { 500 },
289 { 920 },
290 { 611 },
291 { 611 },
292 { 667 },
293 { 722 },
294 { 611 },
295 { 611 },
296 { 722 },
297 { 722 },
298 { 333 },
299 { 444 },
300 { 667 },
301 { 556 },
302 { 833 },
303 { 667 },
304 { 722 },
305 { 611 },
306 { 722 },
307 { 611 },
308 { 500 },
309 { 556 },
310 { 722 },
311 { 611 },
312 { 833 },
313 { 611 },
314 { 556 },
315 { 556 },
316 { 389 },
317 { 278 },
318 { 389 },
319 { 422 },
320 { 500 },
321 { 333 },
322 { 500 },
323 { 500 },
324 { 444 },
325 { 500 },
326 { 444 },
327 { 278 },
328 { 500 },
329 { 500 },
330 { 278 },
331 { 278 },
332 { 444 },
333 { 278 },
334 { 722 },
335 { 500 },
336 { 500 },
337 { 500 },
338 { 500 },
339 { 389 },
340 { 389 },
341 { 278 },
342 { 500 },
343 { 444 },
344 { 667 },
345 { 444 },
346 { 444 },
347 { 389 },
348 { 400 },
349 { 275 },
350 { 400 },
351 { 541 },
352 } },
353 };
354
355 /* These work the buffer used by the header and footer. */
356 #define PS_BUFSLOP 128
357
358 static void
359 ps_growbuf(struct termp *p, size_t sz)
360 {
361 if (p->engine.ps.psmargcur + sz <= p->engine.ps.psmargsz)
362 return;
363
364 if (sz < PS_BUFSLOP)
365 sz = PS_BUFSLOP;
366
367 p->engine.ps.psmargsz += sz;
368
369 p->engine.ps.psmarg = mandoc_realloc
370 (p->engine.ps.psmarg,
371 p->engine.ps.psmargsz);
372 }
373
374 static double ps_hspan(const struct termp *,
375 const struct roffsu *);
376 static size_t ps_width(const struct termp *, char);
377 static void ps_advance(struct termp *, size_t);
378 static void ps_begin(struct termp *);
379 static void ps_closepage(struct termp *);
380 static void ps_end(struct termp *);
381 static void ps_endline(struct termp *);
382 static void ps_fclose(struct termp *);
383 static void ps_letter(struct termp *, char);
384 static void ps_pclose(struct termp *);
385 static void ps_pletter(struct termp *, int);
386 static void ps_printf(struct termp *, const char *, ...);
387 static void ps_putchar(struct termp *, char);
388 static void ps_setfont(struct termp *, enum termfont);
389 static struct termp *pspdf_alloc(char *);
390 static void pdf_obj(struct termp *, size_t);
391
392
393 void *
394 pdf_alloc(char *outopts)
395 {
396 struct termp *p;
397
398 if (NULL != (p = pspdf_alloc(outopts)))
399 p->type = TERMTYPE_PDF;
400
401 return(p);
402 }
403
404
405 void *
406 ps_alloc(char *outopts)
407 {
408 struct termp *p;
409
410 if (NULL != (p = pspdf_alloc(outopts)))
411 p->type = TERMTYPE_PS;
412
413 return(p);
414 }
415
416
417 static struct termp *
418 pspdf_alloc(char *outopts)
419 {
420 struct termp *p;
421 size_t pagex, pagey, marginx, marginy, lineheight;
422 const char *toks[2];
423 const char *pp;
424 char *v;
425
426 p = term_alloc(TERMENC_ASCII);
427
428 p->advance = ps_advance;
429 p->begin = ps_begin;
430 p->end = ps_end;
431 p->endline = ps_endline;
432 p->hspan = ps_hspan;
433 p->letter = ps_letter;
434 p->width = ps_width;
435
436 toks[0] = "paper";
437 toks[1] = NULL;
438
439 pp = NULL;
440
441 while (outopts && *outopts)
442 switch (getsubopt(&outopts, UNCONST(toks), &v)) {
443 case (0):
444 pp = v;
445 break;
446 default:
447 break;
448 }
449
450 /* Default to US letter (millimetres). */
451
452 pagex = 216;
453 pagey = 279;
454
455 /*
456 * The ISO-269 paper sizes can be calculated automatically, but
457 * it would require bringing in -lm for pow() and I'd rather not
458 * do that. So just do it the easy way for now. Since this
459 * only happens once, I'm not terribly concerned.
460 */
461
462 if (pp && strcasecmp(pp, "letter")) {
463 if (0 == strcasecmp(pp, "a3")) {
464 pagex = 297;
465 pagey = 420;
466 } else if (0 == strcasecmp(pp, "a4")) {
467 pagex = 210;
468 pagey = 297;
469 } else if (0 == strcasecmp(pp, "a5")) {
470 pagex = 148;
471 pagey = 210;
472 } else if (0 == strcasecmp(pp, "legal")) {
473 pagex = 216;
474 pagey = 356;
475 } else if (2 != sscanf(pp, "%zux%zu", &pagex, &pagey))
476 fprintf(stderr, "%s: Unknown paper\n", pp);
477 } else if (NULL == pp)
478 pp = "letter";
479
480 /*
481 * This MUST be defined before any PNT2AFM or AFM2PNT
482 * calculations occur.
483 */
484
485 p->engine.ps.scale = 11;
486
487 /* Remember millimetres -> AFM units. */
488
489 pagex = PNT2AFM(p, ((double)pagex * 2.834));
490 pagey = PNT2AFM(p, ((double)pagey * 2.834));
491
492 /* Margins are 1/9 the page x and y. */
493
494 marginx = /* LINTED */
495 (size_t)((double)pagex / 9.0);
496 marginy = /* LINTED */
497 (size_t)((double)pagey / 9.0);
498
499 /* Line-height is 1.4em. */
500
501 lineheight = PNT2AFM(p, ((double)p->engine.ps.scale * 1.4));
502
503 p->engine.ps.width = pagex;
504 p->engine.ps.height = pagey;
505 p->engine.ps.header = pagey - (marginy / 2) - (lineheight / 2);
506 p->engine.ps.top = pagey - marginy;
507 p->engine.ps.footer = (marginy / 2) - (lineheight / 2);
508 p->engine.ps.bottom = marginy;
509 p->engine.ps.left = marginx;
510 p->engine.ps.lineheight = lineheight;
511
512 p->defrmargin = pagex - (marginx * 2);
513 return(p);
514 }
515
516
517 void
518 pspdf_free(void *arg)
519 {
520 struct termp *p;
521
522 p = (struct termp *)arg;
523
524 if (p->engine.ps.psmarg)
525 free(p->engine.ps.psmarg);
526 if (p->engine.ps.pdfobjs)
527 free(p->engine.ps.pdfobjs);
528
529 term_free(p);
530 }
531
532
533 static void
534 ps_printf(struct termp *p, const char *fmt, ...)
535 {
536 va_list ap;
537 int pos, len;
538
539 va_start(ap, fmt);
540
541 /*
542 * If we're running in regular mode, then pipe directly into
543 * vprintf(). If we're processing margins, then push the data
544 * into our growable margin buffer.
545 */
546
547 if ( ! (PS_MARGINS & p->engine.ps.flags)) {
548 len = vprintf(fmt, ap);
549 va_end(ap);
550 p->engine.ps.pdfbytes += /* LINTED */
551 len < 0 ? 0 : (size_t)len;
552 return;
553 }
554
555 /*
556 * XXX: I assume that the in-margin print won't exceed
557 * PS_BUFSLOP (128 bytes), which is reasonable but still an
558 * assumption that will cause pukeage if it's not the case.
559 */
560
561 ps_growbuf(p, PS_BUFSLOP);
562
563 pos = (int)p->engine.ps.psmargcur;
564 len = vsnprintf(&p->engine.ps.psmarg[pos], PS_BUFSLOP, fmt, ap);
565
566 va_end(ap);
567
568 p->engine.ps.psmargcur = strlen(p->engine.ps.psmarg);
569 }
570
571
572 static void
573 ps_putchar(struct termp *p, char c)
574 {
575 int pos;
576
577 /* See ps_printf(). */
578
579 if ( ! (PS_MARGINS & p->engine.ps.flags)) {
580 /* LINTED */
581 putchar(c);
582 p->engine.ps.pdfbytes++;
583 return;
584 }
585
586 ps_growbuf(p, 2);
587
588 pos = (int)p->engine.ps.psmargcur++;
589 p->engine.ps.psmarg[pos++] = c;
590 p->engine.ps.psmarg[pos] = '\0';
591 }
592
593
594 static void
595 pdf_obj(struct termp *p, size_t obj)
596 {
597
598 assert(obj > 0);
599
600 if ((obj - 1) >= p->engine.ps.pdfobjsz) {
601 p->engine.ps.pdfobjsz = obj + 128;
602 p->engine.ps.pdfobjs = realloc
603 (p->engine.ps.pdfobjs,
604 p->engine.ps.pdfobjsz * sizeof(size_t));
605 if (NULL == p->engine.ps.pdfobjs) {
606 perror(NULL);
607 exit((int)MANDOCLEVEL_SYSERR);
608 }
609 }
610
611 p->engine.ps.pdfobjs[(int)obj - 1] = p->engine.ps.pdfbytes;
612 ps_printf(p, "%zu 0 obj\n", obj);
613 }
614
615
616 static void
617 ps_closepage(struct termp *p)
618 {
619 int i;
620 size_t len, base;
621
622 /*
623 * Close out a page that we've already flushed to output. In
624 * PostScript, we simply note that the page must be showed. In
625 * PDF, we must now create the Length, Resource, and Page node
626 * for the page contents.
627 */
628
629 assert(p->engine.ps.psmarg && p->engine.ps.psmarg[0]);
630 ps_printf(p, "%s", p->engine.ps.psmarg);
631
632 if (TERMTYPE_PS != p->type) {
633 ps_printf(p, "ET\n");
634
635 len = p->engine.ps.pdfbytes - p->engine.ps.pdflastpg;
636 base = p->engine.ps.pages * 4 + p->engine.ps.pdfbody;
637
638 ps_printf(p, "endstream\nendobj\n");
639
640 /* Length of content. */
641 pdf_obj(p, base + 1);
642 ps_printf(p, "%zu\nendobj\n", len);
643
644 /* Resource for content. */
645 pdf_obj(p, base + 2);
646 ps_printf(p, "<<\n/ProcSet [/PDF /Text]\n");
647 ps_printf(p, "/Font <<\n");
648 for (i = 0; i < (int)TERMFONT__MAX; i++)
649 ps_printf(p, "/F%d %d 0 R\n", i, 3 + i);
650 ps_printf(p, ">>\n>>\n");
651
652 /* Page node. */
653 pdf_obj(p, base + 3);
654 ps_printf(p, "<<\n");
655 ps_printf(p, "/Type /Page\n");
656 ps_printf(p, "/Parent 2 0 R\n");
657 ps_printf(p, "/Resources %zu 0 R\n", base + 2);
658 ps_printf(p, "/Contents %zu 0 R\n", base);
659 ps_printf(p, ">>\nendobj\n");
660 } else
661 ps_printf(p, "showpage\n");
662
663 p->engine.ps.pages++;
664 p->engine.ps.psrow = p->engine.ps.top;
665 assert( ! (PS_NEWPAGE & p->engine.ps.flags));
666 p->engine.ps.flags |= PS_NEWPAGE;
667 }
668
669
670 /* ARGSUSED */
671 static void
672 ps_end(struct termp *p)
673 {
674 size_t i, xref, base;
675
676 /*
677 * At the end of the file, do one last showpage. This is the
678 * same behaviour as groff(1) and works for multiple pages as
679 * well as just one.
680 */
681
682 if ( ! (PS_NEWPAGE & p->engine.ps.flags)) {
683 assert(0 == p->engine.ps.flags);
684 assert('\0' == p->engine.ps.last);
685 ps_closepage(p);
686 }
687
688 if (TERMTYPE_PS == p->type) {
689 ps_printf(p, "%%%%Trailer\n");
690 ps_printf(p, "%%%%Pages: %zu\n", p->engine.ps.pages);
691 ps_printf(p, "%%%%EOF\n");
692 return;
693 }
694
695 pdf_obj(p, 2);
696 ps_printf(p, "<<\n/Type /Pages\n");
697 ps_printf(p, "/MediaBox [0 0 %zu %zu]\n",
698 (size_t)AFM2PNT(p, p->engine.ps.width),
699 (size_t)AFM2PNT(p, p->engine.ps.height));
700
701 ps_printf(p, "/Count %zu\n", p->engine.ps.pages);
702 ps_printf(p, "/Kids [");
703
704 for (i = 0; i < p->engine.ps.pages; i++)
705 ps_printf(p, " %zu 0 R", i * 4 +
706 p->engine.ps.pdfbody + 3);
707
708 base = (p->engine.ps.pages - 1) * 4 +
709 p->engine.ps.pdfbody + 4;
710
711 ps_printf(p, "]\n>>\nendobj\n");
712 pdf_obj(p, base);
713 ps_printf(p, "<<\n");
714 ps_printf(p, "/Type /Catalog\n");
715 ps_printf(p, "/Pages 2 0 R\n");
716 ps_printf(p, ">>\n");
717 xref = p->engine.ps.pdfbytes;
718 ps_printf(p, "xref\n");
719 ps_printf(p, "0 %zu\n", base + 1);
720 ps_printf(p, "0000000000 65535 f \n");
721
722 for (i = 0; i < base; i++)
723 ps_printf(p, "%.10zu 00000 n \n",
724 p->engine.ps.pdfobjs[(int)i]);
725
726 ps_printf(p, "trailer\n");
727 ps_printf(p, "<<\n");
728 ps_printf(p, "/Size %zu\n", base + 1);
729 ps_printf(p, "/Root %zu 0 R\n", base);
730 ps_printf(p, "/Info 1 0 R\n");
731 ps_printf(p, ">>\n");
732 ps_printf(p, "startxref\n");
733 ps_printf(p, "%zu\n", xref);
734 ps_printf(p, "%%%%EOF\n");
735 }
736
737
738 static void
739 ps_begin(struct termp *p)
740 {
741 time_t t;
742 int i;
743
744 /*
745 * Print margins into margin buffer. Nothing gets output to the
746 * screen yet, so we don't need to initialise the primary state.
747 */
748
749 if (p->engine.ps.psmarg) {
750 assert(p->engine.ps.psmargsz);
751 p->engine.ps.psmarg[0] = '\0';
752 }
753
754 /*p->engine.ps.pdfbytes = 0;*/
755 p->engine.ps.psmargcur = 0;
756 p->engine.ps.flags = PS_MARGINS;
757 p->engine.ps.pscol = p->engine.ps.left;
758 p->engine.ps.psrow = p->engine.ps.header;
759
760 ps_setfont(p, TERMFONT_NONE);
761
762 (*p->headf)(p, p->argf);
763 (*p->endline)(p);
764
765 p->engine.ps.pscol = p->engine.ps.left;
766 p->engine.ps.psrow = p->engine.ps.footer;
767
768 (*p->footf)(p, p->argf);
769 (*p->endline)(p);
770
771 p->engine.ps.flags &= ~PS_MARGINS;
772
773 assert(0 == p->engine.ps.flags);
774 assert(p->engine.ps.psmarg);
775 assert('\0' != p->engine.ps.psmarg[0]);
776
777 /*
778 * Print header and initialise page state. Following this,
779 * stuff gets printed to the screen, so make sure we're sane.
780 */
781
782 t = time(NULL);
783
784 if (TERMTYPE_PS == p->type) {
785 ps_printf(p, "%%!PS-Adobe-3.0\n");
786 ps_printf(p, "%%%%CreationDate: %s", ctime(&t));
787 ps_printf(p, "%%%%DocumentData: Clean7Bit\n");
788 ps_printf(p, "%%%%Orientation: Portrait\n");
789 ps_printf(p, "%%%%Pages: (atend)\n");
790 ps_printf(p, "%%%%PageOrder: Ascend\n");
791 ps_printf(p, "%%%%DocumentMedia: "
792 "Default %zu %zu 0 () ()\n",
793 (size_t)AFM2PNT(p, p->engine.ps.width),
794 (size_t)AFM2PNT(p, p->engine.ps.height));
795 ps_printf(p, "%%%%DocumentNeededResources: font");
796
797 for (i = 0; i < (int)TERMFONT__MAX; i++)
798 ps_printf(p, " %s", fonts[i].name);
799
800 ps_printf(p, "\n%%%%EndComments\n");
801 } else {
802 ps_printf(p, "%%PDF-1.1\n");
803 pdf_obj(p, 1);
804 ps_printf(p, "<<\n");
805 ps_printf(p, ">>\n");
806 ps_printf(p, "endobj\n");
807
808 for (i = 0; i < (int)TERMFONT__MAX; i++) {
809 pdf_obj(p, (size_t)i + 3);
810 ps_printf(p, "<<\n");
811 ps_printf(p, "/Type /Font\n");
812 ps_printf(p, "/Subtype /Type1\n");
813 ps_printf(p, "/Name /F%zu\n", i);
814 ps_printf(p, "/BaseFont /%s\n", fonts[i].name);
815 ps_printf(p, ">>\n");
816 }
817 }
818
819 p->engine.ps.pdfbody = (size_t)TERMFONT__MAX + 3;
820 p->engine.ps.pscol = p->engine.ps.left;
821 p->engine.ps.psrow = p->engine.ps.top;
822 p->engine.ps.flags |= PS_NEWPAGE;
823 ps_setfont(p, TERMFONT_NONE);
824 }
825
826
827 static void
828 ps_pletter(struct termp *p, int c)
829 {
830 int f;
831
832 /*
833 * If we haven't opened a page context, then output that we're
834 * in a new page and make sure the font is correctly set.
835 */
836
837 if (PS_NEWPAGE & p->engine.ps.flags) {
838 if (TERMTYPE_PS == p->type) {
839 ps_printf(p, "%%%%Page: %zu %zu\n",
840 p->engine.ps.pages + 1,
841 p->engine.ps.pages + 1);
842 ps_printf(p, "/%s %zu selectfont\n",
843 fonts[(int)p->engine.ps.lastf].name,
844 p->engine.ps.scale);
845 } else {
846 pdf_obj(p, p->engine.ps.pdfbody +
847 p->engine.ps.pages * 4);
848 ps_printf(p, "<<\n");
849 ps_printf(p, "/Length %zu 0 R\n",
850 p->engine.ps.pdfbody + 1 +
851 p->engine.ps.pages * 4);
852 ps_printf(p, ">>\nstream\n");
853 }
854 p->engine.ps.pdflastpg = p->engine.ps.pdfbytes;
855 p->engine.ps.flags &= ~PS_NEWPAGE;
856 }
857
858 /*
859 * If we're not in a PostScript "word" context, then open one
860 * now at the current cursor.
861 */
862
863 if ( ! (PS_INLINE & p->engine.ps.flags)) {
864 if (TERMTYPE_PS != p->type) {
865 ps_printf(p, "BT\n/F%d %zu Tf\n",
866 (int)p->engine.ps.lastf,
867 p->engine.ps.scale);
868 ps_printf(p, "%.3f %.3f Td\n(",
869 AFM2PNT(p, p->engine.ps.pscol),
870 AFM2PNT(p, p->engine.ps.psrow));
871 } else
872 ps_printf(p, "%.3f %.3f moveto\n(",
873 AFM2PNT(p, p->engine.ps.pscol),
874 AFM2PNT(p, p->engine.ps.psrow));
875 p->engine.ps.flags |= PS_INLINE;
876 }
877
878 assert( ! (PS_NEWPAGE & p->engine.ps.flags));
879
880 /*
881 * We need to escape these characters as per the PostScript
882 * specification. We would also escape non-graphable characters
883 * (like tabs), but none of them would get to this point and
884 * it's superfluous to abort() on them.
885 */
886
887 switch (c) {
888 case ('('):
889 /* FALLTHROUGH */
890 case (')'):
891 /* FALLTHROUGH */
892 case ('\\'):
893 ps_putchar(p, '\\');
894 break;
895 default:
896 break;
897 }
898
899 /* Write the character and adjust where we are on the page. */
900
901 f = (int)p->engine.ps.lastf;
902
903 if (c <= 32 || (c - 32 >= MAXCHAR)) {
904 ps_putchar(p, ' ');
905 p->engine.ps.pscol += (size_t)fonts[f].gly[0].wx;
906 return;
907 }
908
909 ps_putchar(p, (char)c);
910 c -= 32;
911 p->engine.ps.pscol += (size_t)fonts[f].gly[c].wx;
912 }
913
914
915 static void
916 ps_pclose(struct termp *p)
917 {
918
919 /*
920 * Spit out that we're exiting a word context (this is a
921 * "partial close" because we don't check the last-char buffer
922 * or anything).
923 */
924
925 if ( ! (PS_INLINE & p->engine.ps.flags))
926 return;
927
928 if (TERMTYPE_PS != p->type) {
929 ps_printf(p, ") Tj\nET\n");
930 } else
931 ps_printf(p, ") show\n");
932
933 p->engine.ps.flags &= ~PS_INLINE;
934 }
935
936
937 static void
938 ps_fclose(struct termp *p)
939 {
940
941 /*
942 * Strong closure: if we have a last-char, spit it out after
943 * checking that we're in the right font mode. This will of
944 * course open a new scope, if applicable.
945 *
946 * Following this, close out any scope that's open.
947 */
948
949 if ('\0' != p->engine.ps.last) {
950 if (p->engine.ps.lastf != TERMFONT_NONE) {
951 ps_pclose(p);
952 ps_setfont(p, TERMFONT_NONE);
953 }
954 ps_pletter(p, p->engine.ps.last);
955 p->engine.ps.last = '\0';
956 }
957
958 if ( ! (PS_INLINE & p->engine.ps.flags))
959 return;
960
961 ps_pclose(p);
962 }
963
964
965 static void
966 ps_letter(struct termp *p, char c)
967 {
968 char cc;
969
970 /*
971 * State machine dictates whether to buffer the last character
972 * or not. Basically, encoded words are detected by checking if
973 * we're an "8" and switching on the buffer. Then we put "8" in
974 * our buffer, and on the next charater, flush both character
975 * and buffer. Thus, "regular" words are detected by having a
976 * regular character and a regular buffer character.
977 */
978
979 if ('\0' == p->engine.ps.last) {
980 assert(8 != c);
981 p->engine.ps.last = c;
982 return;
983 } else if (8 == p->engine.ps.last) {
984 assert(8 != c);
985 p->engine.ps.last = '\0';
986 } else if (8 == c) {
987 assert(8 != p->engine.ps.last);
988 if ('_' == p->engine.ps.last) {
989 if (p->engine.ps.lastf != TERMFONT_UNDER) {
990 ps_pclose(p);
991 ps_setfont(p, TERMFONT_UNDER);
992 }
993 } else if (p->engine.ps.lastf != TERMFONT_BOLD) {
994 ps_pclose(p);
995 ps_setfont(p, TERMFONT_BOLD);
996 }
997 p->engine.ps.last = c;
998 return;
999 } else {
1000 if (p->engine.ps.lastf != TERMFONT_NONE) {
1001 ps_pclose(p);
1002 ps_setfont(p, TERMFONT_NONE);
1003 }
1004 cc = p->engine.ps.last;
1005 p->engine.ps.last = c;
1006 c = cc;
1007 }
1008
1009 ps_pletter(p, c);
1010 }
1011
1012
1013 static void
1014 ps_advance(struct termp *p, size_t len)
1015 {
1016
1017 /*
1018 * Advance some spaces. This can probably be made smarter,
1019 * i.e., to have multiple space-separated words in the same
1020 * scope, but this is easier: just close out the current scope
1021 * and readjust our column settings.
1022 */
1023
1024 ps_fclose(p);
1025 p->engine.ps.pscol += len;
1026 }
1027
1028
1029 static void
1030 ps_endline(struct termp *p)
1031 {
1032
1033 /* Close out any scopes we have open: we're at eoln. */
1034
1035 ps_fclose(p);
1036
1037 /*
1038 * If we're in the margin, don't try to recalculate our current
1039 * row. XXX: if the column tries to be fancy with multiple
1040 * lines, we'll do nasty stuff.
1041 */
1042
1043 if (PS_MARGINS & p->engine.ps.flags)
1044 return;
1045
1046 /* Left-justify. */
1047
1048 p->engine.ps.pscol = p->engine.ps.left;
1049
1050 /* If we haven't printed anything, return. */
1051
1052 if (PS_NEWPAGE & p->engine.ps.flags)
1053 return;
1054
1055 /*
1056 * Put us down a line. If we're at the page bottom, spit out a
1057 * showpage and restart our row.
1058 */
1059
1060 if (p->engine.ps.psrow >= p->engine.ps.lineheight +
1061 p->engine.ps.bottom) {
1062 p->engine.ps.psrow -= p->engine.ps.lineheight;
1063 return;
1064 }
1065
1066 ps_closepage(p);
1067 }
1068
1069
1070 static void
1071 ps_setfont(struct termp *p, enum termfont f)
1072 {
1073
1074 assert(f < TERMFONT__MAX);
1075 p->engine.ps.lastf = f;
1076
1077 /*
1078 * If we're still at the top of the page, let the font-setting
1079 * be delayed until we actually have stuff to print.
1080 */
1081
1082 if (PS_NEWPAGE & p->engine.ps.flags)
1083 return;
1084
1085 if (TERMTYPE_PS == p->type)
1086 ps_printf(p, "/%s %zu selectfont\n",
1087 fonts[(int)f].name,
1088 p->engine.ps.scale);
1089 else
1090 ps_printf(p, "/F%d %zu Tf\n",
1091 (int)f,
1092 p->engine.ps.scale);
1093 }
1094
1095
1096 /* ARGSUSED */
1097 static size_t
1098 ps_width(const struct termp *p, char c)
1099 {
1100
1101 if (c <= 32 || c - 32 >= MAXCHAR)
1102 return((size_t)fonts[(int)TERMFONT_NONE].gly[0].wx);
1103
1104 c -= 32;
1105 return((size_t)fonts[(int)TERMFONT_NONE].gly[(int)c].wx);
1106 }
1107
1108
1109 static double
1110 ps_hspan(const struct termp *p, const struct roffsu *su)
1111 {
1112 double r;
1113
1114 /*
1115 * All of these measurements are derived by converting from the
1116 * native measurement to AFM units.
1117 */
1118
1119 switch (su->unit) {
1120 case (SCALE_CM):
1121 r = PNT2AFM(p, su->scale * 28.34);
1122 break;
1123 case (SCALE_IN):
1124 r = PNT2AFM(p, su->scale * 72);
1125 break;
1126 case (SCALE_PC):
1127 r = PNT2AFM(p, su->scale * 12);
1128 break;
1129 case (SCALE_PT):
1130 r = PNT2AFM(p, su->scale * 100);
1131 break;
1132 case (SCALE_EM):
1133 r = su->scale *
1134 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx;
1135 break;
1136 case (SCALE_MM):
1137 r = PNT2AFM(p, su->scale * 2.834);
1138 break;
1139 case (SCALE_EN):
1140 r = su->scale *
1141 fonts[(int)TERMFONT_NONE].gly[110 - 32].wx;
1142 break;
1143 case (SCALE_VS):
1144 r = su->scale * p->engine.ps.lineheight;
1145 break;
1146 default:
1147 r = su->scale;
1148 break;
1149 }
1150
1151 return(r);
1152 }
1153
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