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[mandoc.git] / term_ps.c
1 /* $Id: term_ps.c,v 1.46 2011/01/25 17:32:04 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 = realloc
370 (p->engine.ps.psmarg,
371 p->engine.ps.psmargsz);
372
373 if (NULL == p->engine.ps.psmarg) {
374 perror(NULL);
375 exit((int)MANDOCLEVEL_SYSERR);
376 }
377 }
378
379 static double ps_hspan(const struct termp *,
380 const struct roffsu *);
381 static size_t ps_width(const struct termp *, char);
382 static void ps_advance(struct termp *, size_t);
383 static void ps_begin(struct termp *);
384 static void ps_closepage(struct termp *);
385 static void ps_end(struct termp *);
386 static void ps_endline(struct termp *);
387 static void ps_fclose(struct termp *);
388 static void ps_letter(struct termp *, char);
389 static void ps_pclose(struct termp *);
390 static void ps_pletter(struct termp *, int);
391 static void ps_printf(struct termp *, const char *, ...);
392 static void ps_putchar(struct termp *, char);
393 static void ps_setfont(struct termp *, enum termfont);
394 static struct termp *pspdf_alloc(char *);
395 static void pdf_obj(struct termp *, size_t);
396
397
398 void *
399 pdf_alloc(char *outopts)
400 {
401 struct termp *p;
402
403 if (NULL != (p = pspdf_alloc(outopts)))
404 p->type = TERMTYPE_PDF;
405
406 return(p);
407 }
408
409
410 void *
411 ps_alloc(char *outopts)
412 {
413 struct termp *p;
414
415 if (NULL != (p = pspdf_alloc(outopts)))
416 p->type = TERMTYPE_PS;
417
418 return(p);
419 }
420
421
422 static struct termp *
423 pspdf_alloc(char *outopts)
424 {
425 struct termp *p;
426 size_t pagex, pagey, marginx, marginy, lineheight;
427 const char *toks[2];
428 const char *pp;
429 char *v;
430
431 p = term_alloc(TERMENC_ASCII);
432
433 p->advance = ps_advance;
434 p->begin = ps_begin;
435 p->end = ps_end;
436 p->endline = ps_endline;
437 p->hspan = ps_hspan;
438 p->letter = ps_letter;
439 p->width = ps_width;
440
441 toks[0] = "paper";
442 toks[1] = NULL;
443
444 pp = NULL;
445
446 while (outopts && *outopts)
447 switch (getsubopt(&outopts, UNCONST(toks), &v)) {
448 case (0):
449 pp = v;
450 break;
451 default:
452 break;
453 }
454
455 /* Default to US letter (millimetres). */
456
457 pagex = 216;
458 pagey = 279;
459
460 /*
461 * The ISO-269 paper sizes can be calculated automatically, but
462 * it would require bringing in -lm for pow() and I'd rather not
463 * do that. So just do it the easy way for now. Since this
464 * only happens once, I'm not terribly concerned.
465 */
466
467 if (pp && strcasecmp(pp, "letter")) {
468 if (0 == strcasecmp(pp, "a3")) {
469 pagex = 297;
470 pagey = 420;
471 } else if (0 == strcasecmp(pp, "a4")) {
472 pagex = 210;
473 pagey = 297;
474 } else if (0 == strcasecmp(pp, "a5")) {
475 pagex = 148;
476 pagey = 210;
477 } else if (0 == strcasecmp(pp, "legal")) {
478 pagex = 216;
479 pagey = 356;
480 } else if (2 != sscanf(pp, "%zux%zu", &pagex, &pagey))
481 fprintf(stderr, "%s: Unknown paper\n", pp);
482 } else if (NULL == pp)
483 pp = "letter";
484
485 /*
486 * This MUST be defined before any PNT2AFM or AFM2PNT
487 * calculations occur.
488 */
489
490 p->engine.ps.scale = 11;
491
492 /* Remember millimetres -> AFM units. */
493
494 pagex = PNT2AFM(p, ((double)pagex * 2.834));
495 pagey = PNT2AFM(p, ((double)pagey * 2.834));
496
497 /* Margins are 1/9 the page x and y. */
498
499 marginx = /* LINTED */
500 (size_t)((double)pagex / 9.0);
501 marginy = /* LINTED */
502 (size_t)((double)pagey / 9.0);
503
504 /* Line-height is 1.4em. */
505
506 lineheight = PNT2AFM(p, ((double)p->engine.ps.scale * 1.4));
507
508 p->engine.ps.width = pagex;
509 p->engine.ps.height = pagey;
510 p->engine.ps.header = pagey - (marginy / 2) - (lineheight / 2);
511 p->engine.ps.top = pagey - marginy;
512 p->engine.ps.footer = (marginy / 2) - (lineheight / 2);
513 p->engine.ps.bottom = marginy;
514 p->engine.ps.left = marginx;
515 p->engine.ps.lineheight = lineheight;
516
517 p->defrmargin = pagex - (marginx * 2);
518 return(p);
519 }
520
521
522 void
523 pspdf_free(void *arg)
524 {
525 struct termp *p;
526
527 p = (struct termp *)arg;
528
529 if (p->engine.ps.psmarg)
530 free(p->engine.ps.psmarg);
531 if (p->engine.ps.pdfobjs)
532 free(p->engine.ps.pdfobjs);
533
534 term_free(p);
535 }
536
537
538 static void
539 ps_printf(struct termp *p, const char *fmt, ...)
540 {
541 va_list ap;
542 int pos, len;
543
544 va_start(ap, fmt);
545
546 /*
547 * If we're running in regular mode, then pipe directly into
548 * vprintf(). If we're processing margins, then push the data
549 * into our growable margin buffer.
550 */
551
552 if ( ! (PS_MARGINS & p->engine.ps.flags)) {
553 len = vprintf(fmt, ap);
554 va_end(ap);
555 p->engine.ps.pdfbytes += /* LINTED */
556 len < 0 ? 0 : (size_t)len;
557 return;
558 }
559
560 /*
561 * XXX: I assume that the in-margin print won't exceed
562 * PS_BUFSLOP (128 bytes), which is reasonable but still an
563 * assumption that will cause pukeage if it's not the case.
564 */
565
566 ps_growbuf(p, PS_BUFSLOP);
567
568 pos = (int)p->engine.ps.psmargcur;
569 len = vsnprintf(&p->engine.ps.psmarg[pos], PS_BUFSLOP, fmt, ap);
570
571 va_end(ap);
572
573 p->engine.ps.psmargcur = strlen(p->engine.ps.psmarg);
574 }
575
576
577 static void
578 ps_putchar(struct termp *p, char c)
579 {
580 int pos;
581
582 /* See ps_printf(). */
583
584 if ( ! (PS_MARGINS & p->engine.ps.flags)) {
585 /* LINTED */
586 putchar(c);
587 p->engine.ps.pdfbytes++;
588 return;
589 }
590
591 ps_growbuf(p, 2);
592
593 pos = (int)p->engine.ps.psmargcur++;
594 p->engine.ps.psmarg[pos++] = c;
595 p->engine.ps.psmarg[pos] = '\0';
596 }
597
598
599 static void
600 pdf_obj(struct termp *p, size_t obj)
601 {
602
603 assert(obj > 0);
604
605 if ((obj - 1) >= p->engine.ps.pdfobjsz) {
606 p->engine.ps.pdfobjsz = obj + 128;
607 p->engine.ps.pdfobjs = realloc
608 (p->engine.ps.pdfobjs,
609 p->engine.ps.pdfobjsz * sizeof(size_t));
610 if (NULL == p->engine.ps.pdfobjs) {
611 perror(NULL);
612 exit((int)MANDOCLEVEL_SYSERR);
613 }
614 }
615
616 p->engine.ps.pdfobjs[(int)obj - 1] = p->engine.ps.pdfbytes;
617 ps_printf(p, "%zu 0 obj\n", obj);
618 }
619
620
621 static void
622 ps_closepage(struct termp *p)
623 {
624 int i;
625 size_t len, base;
626
627 /*
628 * Close out a page that we've already flushed to output. In
629 * PostScript, we simply note that the page must be showed. In
630 * PDF, we must now create the Length, Resource, and Page node
631 * for the page contents.
632 */
633
634 assert(p->engine.ps.psmarg && p->engine.ps.psmarg[0]);
635 ps_printf(p, "%s", p->engine.ps.psmarg);
636
637 if (TERMTYPE_PS != p->type) {
638 ps_printf(p, "ET\n");
639
640 len = p->engine.ps.pdfbytes - p->engine.ps.pdflastpg;
641 base = p->engine.ps.pages * 4 + p->engine.ps.pdfbody;
642
643 ps_printf(p, "endstream\nendobj\n");
644
645 /* Length of content. */
646 pdf_obj(p, base + 1);
647 ps_printf(p, "%zu\nendobj\n", len);
648
649 /* Resource for content. */
650 pdf_obj(p, base + 2);
651 ps_printf(p, "<<\n/ProcSet [/PDF /Text]\n");
652 ps_printf(p, "/Font <<\n");
653 for (i = 0; i < (int)TERMFONT__MAX; i++)
654 ps_printf(p, "/F%d %d 0 R\n", i, 3 + i);
655 ps_printf(p, ">>\n>>\n");
656
657 /* Page node. */
658 pdf_obj(p, base + 3);
659 ps_printf(p, "<<\n");
660 ps_printf(p, "/Type /Page\n");
661 ps_printf(p, "/Parent 2 0 R\n");
662 ps_printf(p, "/Resources %zu 0 R\n", base + 2);
663 ps_printf(p, "/Contents %zu 0 R\n", base);
664 ps_printf(p, ">>\nendobj\n");
665 } else
666 ps_printf(p, "showpage\n");
667
668 p->engine.ps.pages++;
669 p->engine.ps.psrow = p->engine.ps.top;
670 assert( ! (PS_NEWPAGE & p->engine.ps.flags));
671 p->engine.ps.flags |= PS_NEWPAGE;
672 }
673
674
675 /* ARGSUSED */
676 static void
677 ps_end(struct termp *p)
678 {
679 size_t i, xref, base;
680
681 /*
682 * At the end of the file, do one last showpage. This is the
683 * same behaviour as groff(1) and works for multiple pages as
684 * well as just one.
685 */
686
687 if ( ! (PS_NEWPAGE & p->engine.ps.flags)) {
688 assert(0 == p->engine.ps.flags);
689 assert('\0' == p->engine.ps.last);
690 ps_closepage(p);
691 }
692
693 if (TERMTYPE_PS == p->type) {
694 ps_printf(p, "%%%%Trailer\n");
695 ps_printf(p, "%%%%Pages: %zu\n", p->engine.ps.pages);
696 ps_printf(p, "%%%%EOF\n");
697 return;
698 }
699
700 pdf_obj(p, 2);
701 ps_printf(p, "<<\n/Type /Pages\n");
702 ps_printf(p, "/MediaBox [0 0 %zu %zu]\n",
703 (size_t)AFM2PNT(p, p->engine.ps.width),
704 (size_t)AFM2PNT(p, p->engine.ps.height));
705
706 ps_printf(p, "/Count %zu\n", p->engine.ps.pages);
707 ps_printf(p, "/Kids [");
708
709 for (i = 0; i < p->engine.ps.pages; i++)
710 ps_printf(p, " %zu 0 R", i * 4 +
711 p->engine.ps.pdfbody + 3);
712
713 base = (p->engine.ps.pages - 1) * 4 +
714 p->engine.ps.pdfbody + 4;
715
716 ps_printf(p, "]\n>>\nendobj\n");
717 pdf_obj(p, base);
718 ps_printf(p, "<<\n");
719 ps_printf(p, "/Type /Catalog\n");
720 ps_printf(p, "/Pages 2 0 R\n");
721 ps_printf(p, ">>\n");
722 xref = p->engine.ps.pdfbytes;
723 ps_printf(p, "xref\n");
724 ps_printf(p, "0 %zu\n", base + 1);
725 ps_printf(p, "0000000000 65535 f \n");
726
727 for (i = 0; i < base; i++)
728 ps_printf(p, "%.10zu 00000 n \n",
729 p->engine.ps.pdfobjs[(int)i]);
730
731 ps_printf(p, "trailer\n");
732 ps_printf(p, "<<\n");
733 ps_printf(p, "/Size %zu\n", base + 1);
734 ps_printf(p, "/Root %zu 0 R\n", base);
735 ps_printf(p, "/Info 1 0 R\n");
736 ps_printf(p, ">>\n");
737 ps_printf(p, "startxref\n");
738 ps_printf(p, "%zu\n", xref);
739 ps_printf(p, "%%%%EOF\n");
740 }
741
742
743 static void
744 ps_begin(struct termp *p)
745 {
746 time_t t;
747 int i;
748
749 /*
750 * Print margins into margin buffer. Nothing gets output to the
751 * screen yet, so we don't need to initialise the primary state.
752 */
753
754 if (p->engine.ps.psmarg) {
755 assert(p->engine.ps.psmargsz);
756 p->engine.ps.psmarg[0] = '\0';
757 }
758
759 /*p->engine.ps.pdfbytes = 0;*/
760 p->engine.ps.psmargcur = 0;
761 p->engine.ps.flags = PS_MARGINS;
762 p->engine.ps.pscol = p->engine.ps.left;
763 p->engine.ps.psrow = p->engine.ps.header;
764
765 ps_setfont(p, TERMFONT_NONE);
766
767 (*p->headf)(p, p->argf);
768 (*p->endline)(p);
769
770 p->engine.ps.pscol = p->engine.ps.left;
771 p->engine.ps.psrow = p->engine.ps.footer;
772
773 (*p->footf)(p, p->argf);
774 (*p->endline)(p);
775
776 p->engine.ps.flags &= ~PS_MARGINS;
777
778 assert(0 == p->engine.ps.flags);
779 assert(p->engine.ps.psmarg);
780 assert('\0' != p->engine.ps.psmarg[0]);
781
782 /*
783 * Print header and initialise page state. Following this,
784 * stuff gets printed to the screen, so make sure we're sane.
785 */
786
787 t = time(NULL);
788
789 if (TERMTYPE_PS == p->type) {
790 ps_printf(p, "%%!PS-Adobe-3.0\n");
791 ps_printf(p, "%%%%Creator: mandoc-%s\n", VERSION);
792 ps_printf(p, "%%%%CreationDate: %s", ctime(&t));
793 ps_printf(p, "%%%%DocumentData: Clean7Bit\n");
794 ps_printf(p, "%%%%Orientation: Portrait\n");
795 ps_printf(p, "%%%%Pages: (atend)\n");
796 ps_printf(p, "%%%%PageOrder: Ascend\n");
797 ps_printf(p, "%%%%DocumentMedia: "
798 "Default %zu %zu 0 () ()\n",
799 (size_t)AFM2PNT(p, p->engine.ps.width),
800 (size_t)AFM2PNT(p, p->engine.ps.height));
801 ps_printf(p, "%%%%DocumentNeededResources: font");
802
803 for (i = 0; i < (int)TERMFONT__MAX; i++)
804 ps_printf(p, " %s", fonts[i].name);
805
806 ps_printf(p, "\n%%%%EndComments\n");
807 } else {
808 ps_printf(p, "%%PDF-1.1\n");
809 pdf_obj(p, 1);
810 ps_printf(p, "<<\n");
811 ps_printf(p, "/Creator mandoc-%s\n", VERSION);
812 ps_printf(p, ">>\n");
813 ps_printf(p, "endobj\n");
814
815 for (i = 0; i < (int)TERMFONT__MAX; i++) {
816 pdf_obj(p, (size_t)i + 3);
817 ps_printf(p, "<<\n");
818 ps_printf(p, "/Type /Font\n");
819 ps_printf(p, "/Subtype /Type1\n");
820 ps_printf(p, "/Name /F%zu\n", i);
821 ps_printf(p, "/BaseFont /%s\n", fonts[i].name);
822 ps_printf(p, ">>\n");
823 }
824 }
825
826 p->engine.ps.pdfbody = (size_t)TERMFONT__MAX + 3;
827 p->engine.ps.pscol = p->engine.ps.left;
828 p->engine.ps.psrow = p->engine.ps.top;
829 p->engine.ps.flags |= PS_NEWPAGE;
830 ps_setfont(p, TERMFONT_NONE);
831 }
832
833
834 static void
835 ps_pletter(struct termp *p, int c)
836 {
837 int f;
838
839 /*
840 * If we haven't opened a page context, then output that we're
841 * in a new page and make sure the font is correctly set.
842 */
843
844 if (PS_NEWPAGE & p->engine.ps.flags) {
845 if (TERMTYPE_PS == p->type) {
846 ps_printf(p, "%%%%Page: %zu %zu\n",
847 p->engine.ps.pages + 1,
848 p->engine.ps.pages + 1);
849 ps_printf(p, "/%s %zu selectfont\n",
850 fonts[(int)p->engine.ps.lastf].name,
851 p->engine.ps.scale);
852 } else {
853 pdf_obj(p, p->engine.ps.pdfbody +
854 p->engine.ps.pages * 4);
855 ps_printf(p, "<<\n");
856 ps_printf(p, "/Length %zu 0 R\n",
857 p->engine.ps.pdfbody + 1 +
858 p->engine.ps.pages * 4);
859 ps_printf(p, ">>\nstream\n");
860 }
861 p->engine.ps.pdflastpg = p->engine.ps.pdfbytes;
862 p->engine.ps.flags &= ~PS_NEWPAGE;
863 }
864
865 /*
866 * If we're not in a PostScript "word" context, then open one
867 * now at the current cursor.
868 */
869
870 if ( ! (PS_INLINE & p->engine.ps.flags)) {
871 if (TERMTYPE_PS != p->type) {
872 ps_printf(p, "BT\n/F%d %zu Tf\n",
873 (int)p->engine.ps.lastf,
874 p->engine.ps.scale);
875 ps_printf(p, "%.3f %.3f Td\n(",
876 AFM2PNT(p, p->engine.ps.pscol),
877 AFM2PNT(p, p->engine.ps.psrow));
878 } else
879 ps_printf(p, "%.3f %.3f moveto\n(",
880 AFM2PNT(p, p->engine.ps.pscol),
881 AFM2PNT(p, p->engine.ps.psrow));
882 p->engine.ps.flags |= PS_INLINE;
883 }
884
885 assert( ! (PS_NEWPAGE & p->engine.ps.flags));
886
887 /*
888 * We need to escape these characters as per the PostScript
889 * specification. We would also escape non-graphable characters
890 * (like tabs), but none of them would get to this point and
891 * it's superfluous to abort() on them.
892 */
893
894 switch (c) {
895 case ('('):
896 /* FALLTHROUGH */
897 case (')'):
898 /* FALLTHROUGH */
899 case ('\\'):
900 ps_putchar(p, '\\');
901 break;
902 default:
903 break;
904 }
905
906 /* Write the character and adjust where we are on the page. */
907
908 f = (int)p->engine.ps.lastf;
909
910 if (c <= 32 || (c - 32 >= MAXCHAR)) {
911 ps_putchar(p, ' ');
912 p->engine.ps.pscol += (size_t)fonts[f].gly[0].wx;
913 return;
914 }
915
916 ps_putchar(p, (char)c);
917 c -= 32;
918 p->engine.ps.pscol += (size_t)fonts[f].gly[c].wx;
919 }
920
921
922 static void
923 ps_pclose(struct termp *p)
924 {
925
926 /*
927 * Spit out that we're exiting a word context (this is a
928 * "partial close" because we don't check the last-char buffer
929 * or anything).
930 */
931
932 if ( ! (PS_INLINE & p->engine.ps.flags))
933 return;
934
935 if (TERMTYPE_PS != p->type) {
936 ps_printf(p, ") Tj\nET\n");
937 } else
938 ps_printf(p, ") show\n");
939
940 p->engine.ps.flags &= ~PS_INLINE;
941 }
942
943
944 static void
945 ps_fclose(struct termp *p)
946 {
947
948 /*
949 * Strong closure: if we have a last-char, spit it out after
950 * checking that we're in the right font mode. This will of
951 * course open a new scope, if applicable.
952 *
953 * Following this, close out any scope that's open.
954 */
955
956 if ('\0' != p->engine.ps.last) {
957 if (p->engine.ps.lastf != TERMFONT_NONE) {
958 ps_pclose(p);
959 ps_setfont(p, TERMFONT_NONE);
960 }
961 ps_pletter(p, p->engine.ps.last);
962 p->engine.ps.last = '\0';
963 }
964
965 if ( ! (PS_INLINE & p->engine.ps.flags))
966 return;
967
968 ps_pclose(p);
969 }
970
971
972 static void
973 ps_letter(struct termp *p, char c)
974 {
975 char cc;
976
977 /*
978 * State machine dictates whether to buffer the last character
979 * or not. Basically, encoded words are detected by checking if
980 * we're an "8" and switching on the buffer. Then we put "8" in
981 * our buffer, and on the next charater, flush both character
982 * and buffer. Thus, "regular" words are detected by having a
983 * regular character and a regular buffer character.
984 */
985
986 if ('\0' == p->engine.ps.last) {
987 assert(8 != c);
988 p->engine.ps.last = c;
989 return;
990 } else if (8 == p->engine.ps.last) {
991 assert(8 != c);
992 p->engine.ps.last = '\0';
993 } else if (8 == c) {
994 assert(8 != p->engine.ps.last);
995 if ('_' == p->engine.ps.last) {
996 if (p->engine.ps.lastf != TERMFONT_UNDER) {
997 ps_pclose(p);
998 ps_setfont(p, TERMFONT_UNDER);
999 }
1000 } else if (p->engine.ps.lastf != TERMFONT_BOLD) {
1001 ps_pclose(p);
1002 ps_setfont(p, TERMFONT_BOLD);
1003 }
1004 p->engine.ps.last = c;
1005 return;
1006 } else {
1007 if (p->engine.ps.lastf != TERMFONT_NONE) {
1008 ps_pclose(p);
1009 ps_setfont(p, TERMFONT_NONE);
1010 }
1011 cc = p->engine.ps.last;
1012 p->engine.ps.last = c;
1013 c = cc;
1014 }
1015
1016 ps_pletter(p, c);
1017 }
1018
1019
1020 static void
1021 ps_advance(struct termp *p, size_t len)
1022 {
1023
1024 /*
1025 * Advance some spaces. This can probably be made smarter,
1026 * i.e., to have multiple space-separated words in the same
1027 * scope, but this is easier: just close out the current scope
1028 * and readjust our column settings.
1029 */
1030
1031 ps_fclose(p);
1032 p->engine.ps.pscol += len;
1033 }
1034
1035
1036 static void
1037 ps_endline(struct termp *p)
1038 {
1039
1040 /* Close out any scopes we have open: we're at eoln. */
1041
1042 ps_fclose(p);
1043
1044 /*
1045 * If we're in the margin, don't try to recalculate our current
1046 * row. XXX: if the column tries to be fancy with multiple
1047 * lines, we'll do nasty stuff.
1048 */
1049
1050 if (PS_MARGINS & p->engine.ps.flags)
1051 return;
1052
1053 /* Left-justify. */
1054
1055 p->engine.ps.pscol = p->engine.ps.left;
1056
1057 /* If we haven't printed anything, return. */
1058
1059 if (PS_NEWPAGE & p->engine.ps.flags)
1060 return;
1061
1062 /*
1063 * Put us down a line. If we're at the page bottom, spit out a
1064 * showpage and restart our row.
1065 */
1066
1067 if (p->engine.ps.psrow >= p->engine.ps.lineheight +
1068 p->engine.ps.bottom) {
1069 p->engine.ps.psrow -= p->engine.ps.lineheight;
1070 return;
1071 }
1072
1073 ps_closepage(p);
1074 }
1075
1076
1077 static void
1078 ps_setfont(struct termp *p, enum termfont f)
1079 {
1080
1081 assert(f < TERMFONT__MAX);
1082 p->engine.ps.lastf = f;
1083
1084 /*
1085 * If we're still at the top of the page, let the font-setting
1086 * be delayed until we actually have stuff to print.
1087 */
1088
1089 if (PS_NEWPAGE & p->engine.ps.flags)
1090 return;
1091
1092 if (TERMTYPE_PS == p->type)
1093 ps_printf(p, "/%s %zu selectfont\n",
1094 fonts[(int)f].name,
1095 p->engine.ps.scale);
1096 else
1097 ps_printf(p, "/F%d %zu Tf\n",
1098 (int)f,
1099 p->engine.ps.scale);
1100 }
1101
1102
1103 /* ARGSUSED */
1104 static size_t
1105 ps_width(const struct termp *p, char c)
1106 {
1107
1108 if (c <= 32 || c - 32 >= MAXCHAR)
1109 return((size_t)fonts[(int)TERMFONT_NONE].gly[0].wx);
1110
1111 c -= 32;
1112 return((size_t)fonts[(int)TERMFONT_NONE].gly[(int)c].wx);
1113 }
1114
1115
1116 static double
1117 ps_hspan(const struct termp *p, const struct roffsu *su)
1118 {
1119 double r;
1120
1121 /*
1122 * All of these measurements are derived by converting from the
1123 * native measurement to AFM units.
1124 */
1125
1126 switch (su->unit) {
1127 case (SCALE_CM):
1128 r = PNT2AFM(p, su->scale * 28.34);
1129 break;
1130 case (SCALE_IN):
1131 r = PNT2AFM(p, su->scale * 72);
1132 break;
1133 case (SCALE_PC):
1134 r = PNT2AFM(p, su->scale * 12);
1135 break;
1136 case (SCALE_PT):
1137 r = PNT2AFM(p, su->scale * 100);
1138 break;
1139 case (SCALE_EM):
1140 r = su->scale *
1141 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx;
1142 break;
1143 case (SCALE_MM):
1144 r = PNT2AFM(p, su->scale * 2.834);
1145 break;
1146 case (SCALE_EN):
1147 r = su->scale *
1148 fonts[(int)TERMFONT_NONE].gly[110 - 32].wx;
1149 break;
1150 case (SCALE_VS):
1151 r = su->scale * p->engine.ps.lineheight;
1152 break;
1153 default:
1154 r = su->scale;
1155 break;
1156 }
1157
1158 return(r);
1159 }
1160
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