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Correctly print `Lk' arguments in -Tascii. Issue raised by Aldis Berzoja.
[mandoc.git] / term_ps.c
1 /* $Id: term_ps.c,v 1.41 2010/08/06 16:07:35 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/param.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 "out.h"
33 #include "main.h"
34 #include "term.h"
35
36 /* Convert PostScript point "x" to an AFM unit. */
37 #define PNT2AFM(p, x) /* LINTED */ \
38 (size_t)((double)(x) * (1000.0 / (double)(p)->engine.ps.scale))
39
40 /* Convert an AFM unit "x" to a PostScript points */
41 #define AFM2PNT(p, x) /* LINTED */ \
42 ((double)(x) / (1000.0 / (double)(p)->engine.ps.scale))
43
44 struct glyph {
45 unsigned short wx; /* WX in AFM */
46 };
47
48 struct font {
49 const char *name; /* FontName in AFM */
50 #define MAXCHAR 95 /* total characters we can handle */
51 struct glyph gly[MAXCHAR]; /* glyph metrics */
52 };
53
54 /*
55 * We define, for the time being, three fonts: bold, oblique/italic, and
56 * normal (roman). The following table hard-codes the font metrics for
57 * ASCII, i.e., 32--127.
58 */
59
60 static const struct font fonts[TERMFONT__MAX] = {
61 { "Times-Roman", {
62 { 250 },
63 { 333 },
64 { 408 },
65 { 500 },
66 { 500 },
67 { 833 },
68 { 778 },
69 { 333 },
70 { 333 },
71 { 333 },
72 { 500 },
73 { 564 },
74 { 250 },
75 { 333 },
76 { 250 },
77 { 278 },
78 { 500 },
79 { 500 },
80 { 500 },
81 { 500 },
82 { 500 },
83 { 500 },
84 { 500 },
85 { 500 },
86 { 500 },
87 { 500 },
88 { 278 },
89 { 278 },
90 { 564 },
91 { 564 },
92 { 564 },
93 { 444 },
94 { 921 },
95 { 722 },
96 { 667 },
97 { 667 },
98 { 722 },
99 { 611 },
100 { 556 },
101 { 722 },
102 { 722 },
103 { 333 },
104 { 389 },
105 { 722 },
106 { 611 },
107 { 889 },
108 { 722 },
109 { 722 },
110 { 556 },
111 { 722 },
112 { 667 },
113 { 556 },
114 { 611 },
115 { 722 },
116 { 722 },
117 { 944 },
118 { 722 },
119 { 722 },
120 { 611 },
121 { 333 },
122 { 278 },
123 { 333 },
124 { 469 },
125 { 500 },
126 { 333 },
127 { 444 },
128 { 500 },
129 { 444 },
130 { 500},
131 { 444},
132 { 333},
133 { 500},
134 { 500},
135 { 278},
136 { 278},
137 { 500},
138 { 278},
139 { 778},
140 { 500},
141 { 500},
142 { 500},
143 { 500},
144 { 333},
145 { 389},
146 { 278},
147 { 500},
148 { 500},
149 { 722},
150 { 500},
151 { 500},
152 { 444},
153 { 480},
154 { 200},
155 { 480},
156 { 541},
157 } },
158 { "Times-Bold", {
159 { 250 },
160 { 333 },
161 { 555 },
162 { 500 },
163 { 500 },
164 { 1000 },
165 { 833 },
166 { 333 },
167 { 333 },
168 { 333 },
169 { 500 },
170 { 570 },
171 { 250 },
172 { 333 },
173 { 250 },
174 { 278 },
175 { 500 },
176 { 500 },
177 { 500 },
178 { 500 },
179 { 500 },
180 { 500 },
181 { 500 },
182 { 500 },
183 { 500 },
184 { 500 },
185 { 333 },
186 { 333 },
187 { 570 },
188 { 570 },
189 { 570 },
190 { 500 },
191 { 930 },
192 { 722 },
193 { 667 },
194 { 722 },
195 { 722 },
196 { 667 },
197 { 611 },
198 { 778 },
199 { 778 },
200 { 389 },
201 { 500 },
202 { 778 },
203 { 667 },
204 { 944 },
205 { 722 },
206 { 778 },
207 { 611 },
208 { 778 },
209 { 722 },
210 { 556 },
211 { 667 },
212 { 722 },
213 { 722 },
214 { 1000 },
215 { 722 },
216 { 722 },
217 { 667 },
218 { 333 },
219 { 278 },
220 { 333 },
221 { 581 },
222 { 500 },
223 { 333 },
224 { 500 },
225 { 556 },
226 { 444 },
227 { 556 },
228 { 444 },
229 { 333 },
230 { 500 },
231 { 556 },
232 { 278 },
233 { 333 },
234 { 556 },
235 { 278 },
236 { 833 },
237 { 556 },
238 { 500 },
239 { 556 },
240 { 556 },
241 { 444 },
242 { 389 },
243 { 333 },
244 { 556 },
245 { 500 },
246 { 722 },
247 { 500 },
248 { 500 },
249 { 444 },
250 { 394 },
251 { 220 },
252 { 394 },
253 { 520 },
254 } },
255 { "Times-Italic", {
256 { 250 },
257 { 333 },
258 { 420 },
259 { 500 },
260 { 500 },
261 { 833 },
262 { 778 },
263 { 333 },
264 { 333 },
265 { 333 },
266 { 500 },
267 { 675 },
268 { 250 },
269 { 333 },
270 { 250 },
271 { 278 },
272 { 500 },
273 { 500 },
274 { 500 },
275 { 500 },
276 { 500 },
277 { 500 },
278 { 500 },
279 { 500 },
280 { 500 },
281 { 500 },
282 { 333 },
283 { 333 },
284 { 675 },
285 { 675 },
286 { 675 },
287 { 500 },
288 { 920 },
289 { 611 },
290 { 611 },
291 { 667 },
292 { 722 },
293 { 611 },
294 { 611 },
295 { 722 },
296 { 722 },
297 { 333 },
298 { 444 },
299 { 667 },
300 { 556 },
301 { 833 },
302 { 667 },
303 { 722 },
304 { 611 },
305 { 722 },
306 { 611 },
307 { 500 },
308 { 556 },
309 { 722 },
310 { 611 },
311 { 833 },
312 { 611 },
313 { 556 },
314 { 556 },
315 { 389 },
316 { 278 },
317 { 389 },
318 { 422 },
319 { 500 },
320 { 333 },
321 { 500 },
322 { 500 },
323 { 444 },
324 { 500 },
325 { 444 },
326 { 278 },
327 { 500 },
328 { 500 },
329 { 278 },
330 { 278 },
331 { 444 },
332 { 278 },
333 { 722 },
334 { 500 },
335 { 500 },
336 { 500 },
337 { 500 },
338 { 389 },
339 { 389 },
340 { 278 },
341 { 500 },
342 { 444 },
343 { 667 },
344 { 444 },
345 { 444 },
346 { 389 },
347 { 400 },
348 { 275 },
349 { 400 },
350 { 541 },
351 } },
352 };
353
354 /* These work the buffer used by the header and footer. */
355 #define PS_BUFSLOP 128
356
357 static void
358 ps_growbuf(struct termp *p, size_t sz)
359 {
360 if (p->engine.ps.psmargcur + sz <= p->engine.ps.psmargsz)
361 return;
362
363 if (sz < PS_BUFSLOP)
364 sz = PS_BUFSLOP;
365
366 p->engine.ps.psmargsz += sz;
367
368 p->engine.ps.psmarg = realloc
369 (p->engine.ps.psmarg,
370 p->engine.ps.psmargsz);
371
372 if (NULL == p->engine.ps.psmarg) {
373 perror(NULL);
374 exit(EXIT_FAILURE);
375 }
376 }
377
378 static double ps_hspan(const struct termp *,
379 const struct roffsu *);
380 static size_t ps_width(const struct termp *, char);
381 static void ps_advance(struct termp *, size_t);
382 static void ps_begin(struct termp *);
383 static void ps_closepage(struct termp *);
384 static void ps_end(struct termp *);
385 static void ps_endline(struct termp *);
386 static void ps_fclose(struct termp *);
387 static void ps_letter(struct termp *, char);
388 static void ps_pclose(struct termp *);
389 static void ps_pletter(struct termp *, int);
390 static void ps_printf(struct termp *, const char *, ...);
391 static void ps_putchar(struct termp *, char);
392 static void ps_setfont(struct termp *, enum termfont);
393 static struct termp *pspdf_alloc(char *);
394 static void pdf_obj(struct termp *, size_t);
395
396
397 void *
398 pdf_alloc(char *outopts)
399 {
400 struct termp *p;
401
402 if (NULL != (p = pspdf_alloc(outopts)))
403 p->type = TERMTYPE_PDF;
404
405 return(p);
406 }
407
408
409 void *
410 ps_alloc(char *outopts)
411 {
412 struct termp *p;
413
414 if (NULL != (p = pspdf_alloc(outopts)))
415 p->type = TERMTYPE_PS;
416
417 return(p);
418 }
419
420
421 static struct termp *
422 pspdf_alloc(char *outopts)
423 {
424 struct termp *p;
425 size_t pagex, pagey, marginx, marginy, lineheight;
426 const char *toks[2];
427 const char *pp;
428 char *v;
429
430 if (NULL == (p = term_alloc(TERMENC_ASCII)))
431 return(NULL);
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 putchar(c);
586 p->engine.ps.pdfbytes++;
587 return;
588 }
589
590 ps_growbuf(p, 2);
591
592 pos = (int)p->engine.ps.psmargcur++;
593 p->engine.ps.psmarg[pos++] = c;
594 p->engine.ps.psmarg[pos] = '\0';
595 }
596
597
598 static void
599 pdf_obj(struct termp *p, size_t obj)
600 {
601
602 assert(obj > 0);
603
604 if ((obj - 1) >= p->engine.ps.pdfobjsz) {
605 p->engine.ps.pdfobjsz = obj + 128;
606 p->engine.ps.pdfobjs = realloc
607 (p->engine.ps.pdfobjs,
608 p->engine.ps.pdfobjsz * sizeof(size_t));
609 if (NULL == p->engine.ps.pdfobjs) {
610 perror(NULL);
611 exit(EXIT_FAILURE);
612 }
613 }
614
615 p->engine.ps.pdfobjs[(int)obj - 1] = p->engine.ps.pdfbytes;
616 ps_printf(p, "%zu 0 obj\n", obj);
617 }
618
619
620 static void
621 ps_closepage(struct termp *p)
622 {
623 int i;
624 size_t len, base;
625
626 /*
627 * Close out a page that we've already flushed to output. In
628 * PostScript, we simply note that the page must be showed. In
629 * PDF, we must now create the Length, Resource, and Page node
630 * for the page contents.
631 */
632
633 assert(p->engine.ps.psmarg && p->engine.ps.psmarg[0]);
634 ps_printf(p, "%s", p->engine.ps.psmarg);
635
636 if (TERMTYPE_PS != p->type) {
637 ps_printf(p, "ET\n");
638
639 len = p->engine.ps.pdfbytes - p->engine.ps.pdflastpg;
640 base = p->engine.ps.pages * 4 + p->engine.ps.pdfbody;
641
642 ps_printf(p, "endstream\nendobj\n");
643
644 /* Length of content. */
645 pdf_obj(p, base + 1);
646 ps_printf(p, "%zu\nendobj\n", len);
647
648 /* Resource for content. */
649 pdf_obj(p, base + 2);
650 ps_printf(p, "<<\n/ProcSet [/PDF /Text]\n");
651 ps_printf(p, "/Font <<\n");
652 for (i = 0; i < (int)TERMFONT__MAX; i++)
653 ps_printf(p, "/F%d %d 0 R\n", i, 3 + i);
654 ps_printf(p, ">>\n>>\n");
655
656 /* Page node. */
657 pdf_obj(p, base + 3);
658 ps_printf(p, "<<\n");
659 ps_printf(p, "/Type /Page\n");
660 ps_printf(p, "/Parent 2 0 R\n");
661 ps_printf(p, "/Resources %zu 0 R\n", base + 2);
662 ps_printf(p, "/Contents %zu 0 R\n", base);
663 ps_printf(p, ">>\nendobj\n");
664 } else
665 ps_printf(p, "showpage\n");
666
667 p->engine.ps.pages++;
668 p->engine.ps.psrow = p->engine.ps.top;
669 assert( ! (PS_NEWPAGE & p->engine.ps.flags));
670 p->engine.ps.flags |= PS_NEWPAGE;
671 }
672
673
674 /* ARGSUSED */
675 static void
676 ps_end(struct termp *p)
677 {
678 size_t i, xref, base;
679
680 /*
681 * At the end of the file, do one last showpage. This is the
682 * same behaviour as groff(1) and works for multiple pages as
683 * well as just one.
684 */
685
686 if ( ! (PS_NEWPAGE & p->engine.ps.flags)) {
687 assert(0 == p->engine.ps.flags);
688 assert('\0' == p->engine.ps.last);
689 ps_closepage(p);
690 }
691
692 if (TERMTYPE_PS == p->type) {
693 ps_printf(p, "%%%%Trailer\n");
694 ps_printf(p, "%%%%Pages: %zu\n", p->engine.ps.pages);
695 ps_printf(p, "%%%%EOF\n");
696 return;
697 }
698
699 pdf_obj(p, 2);
700 ps_printf(p, "<<\n/Type /Pages\n");
701 ps_printf(p, "/MediaBox [0 0 %zu %zu]\n",
702 (size_t)AFM2PNT(p, p->engine.ps.width),
703 (size_t)AFM2PNT(p, p->engine.ps.height));
704
705 ps_printf(p, "/Count %zu\n", p->engine.ps.pages);
706 ps_printf(p, "/Kids [");
707
708 for (i = 0; i < p->engine.ps.pages; i++)
709 ps_printf(p, " %zu 0 R", i * 4 +
710 p->engine.ps.pdfbody + 3);
711
712 base = (p->engine.ps.pages - 1) * 4 +
713 p->engine.ps.pdfbody + 4;
714
715 ps_printf(p, "]\n>>\nendobj\n");
716 pdf_obj(p, base);
717 ps_printf(p, "<<\n");
718 ps_printf(p, "/Type /Catalog\n");
719 ps_printf(p, "/Pages 2 0 R\n");
720 ps_printf(p, ">>\n");
721 xref = p->engine.ps.pdfbytes;
722 ps_printf(p, "xref\n");
723 ps_printf(p, "0 %zu\n", base + 1);
724 ps_printf(p, "0000000000 65535 f \n");
725
726 for (i = 0; i < base; i++)
727 ps_printf(p, "%.10zu 00000 n \n",
728 p->engine.ps.pdfobjs[(int)i]);
729
730 ps_printf(p, "trailer\n");
731 ps_printf(p, "<<\n");
732 ps_printf(p, "/Size %zu\n", base + 1);
733 ps_printf(p, "/Root %zu 0 R\n", base);
734 ps_printf(p, "/Info 1 0 R\n");
735 ps_printf(p, ">>\n");
736 ps_printf(p, "startxref\n");
737 ps_printf(p, "%zu\n", xref);
738 ps_printf(p, "%%%%EOF\n");
739 }
740
741
742 static void
743 ps_begin(struct termp *p)
744 {
745 time_t t;
746 int i;
747
748 /*
749 * Print margins into margin buffer. Nothing gets output to the
750 * screen yet, so we don't need to initialise the primary state.
751 */
752
753 if (p->engine.ps.psmarg) {
754 assert(p->engine.ps.psmargsz);
755 p->engine.ps.psmarg[0] = '\0';
756 }
757
758 /*p->engine.ps.pdfbytes = 0;*/
759 p->engine.ps.psmargcur = 0;
760 p->engine.ps.flags = PS_MARGINS;
761 p->engine.ps.pscol = p->engine.ps.left;
762 p->engine.ps.psrow = p->engine.ps.header;
763
764 ps_setfont(p, TERMFONT_NONE);
765
766 (*p->headf)(p, p->argf);
767 (*p->endline)(p);
768
769 p->engine.ps.pscol = p->engine.ps.left;
770 p->engine.ps.psrow = p->engine.ps.footer;
771
772 (*p->footf)(p, p->argf);
773 (*p->endline)(p);
774
775 p->engine.ps.flags &= ~PS_MARGINS;
776
777 assert(0 == p->engine.ps.flags);
778 assert(p->engine.ps.psmarg);
779 assert('\0' != p->engine.ps.psmarg[0]);
780
781 /*
782 * Print header and initialise page state. Following this,
783 * stuff gets printed to the screen, so make sure we're sane.
784 */
785
786 t = time(NULL);
787
788 if (TERMTYPE_PS == p->type) {
789 ps_printf(p, "%%!PS-Adobe-3.0\n");
790 ps_printf(p, "%%%%Creator: mandoc-%s\n", VERSION);
791 ps_printf(p, "%%%%CreationDate: %s", ctime(&t));
792 ps_printf(p, "%%%%DocumentData: Clean7Bit\n");
793 ps_printf(p, "%%%%Orientation: Portrait\n");
794 ps_printf(p, "%%%%Pages: (atend)\n");
795 ps_printf(p, "%%%%PageOrder: Ascend\n");
796 ps_printf(p, "%%%%DocumentMedia: "
797 "Default %zu %zu 0 () ()\n",
798 (size_t)AFM2PNT(p, p->engine.ps.width),
799 (size_t)AFM2PNT(p, p->engine.ps.height));
800 ps_printf(p, "%%%%DocumentNeededResources: font");
801
802 for (i = 0; i < (int)TERMFONT__MAX; i++)
803 ps_printf(p, " %s", fonts[i].name);
804
805 ps_printf(p, "\n%%%%EndComments\n");
806 } else {
807 ps_printf(p, "%%PDF-1.1\n");
808 pdf_obj(p, 1);
809 ps_printf(p, "<<\n");
810 ps_printf(p, "/Creator mandoc-%s\n", VERSION);
811 ps_printf(p, ">>\n");
812 ps_printf(p, "endobj\n");
813
814 for (i = 0; i < (int)TERMFONT__MAX; i++) {
815 pdf_obj(p, (size_t)i + 3);
816 ps_printf(p, "<<\n");
817 ps_printf(p, "/Type /Font\n");
818 ps_printf(p, "/Subtype /Type1\n");
819 ps_printf(p, "/Name /F%zu\n", i);
820 ps_printf(p, "/BaseFont /%s\n", fonts[i].name);
821 ps_printf(p, ">>\n");
822 }
823 }
824
825 p->engine.ps.pdfbody = (size_t)TERMFONT__MAX + 3;
826 p->engine.ps.pscol = p->engine.ps.left;
827 p->engine.ps.psrow = p->engine.ps.top;
828 p->engine.ps.flags |= PS_NEWPAGE;
829 ps_setfont(p, TERMFONT_NONE);
830 }
831
832
833 static void
834 ps_pletter(struct termp *p, int c)
835 {
836 int f;
837
838 /*
839 * If we haven't opened a page context, then output that we're
840 * in a new page and make sure the font is correctly set.
841 */
842
843 if (PS_NEWPAGE & p->engine.ps.flags) {
844 if (TERMTYPE_PS == p->type) {
845 ps_printf(p, "%%%%Page: %zu %zu\n",
846 p->engine.ps.pages + 1,
847 p->engine.ps.pages + 1);
848 ps_printf(p, "/%s %zu selectfont\n",
849 fonts[(int)p->engine.ps.lastf].name,
850 p->engine.ps.scale);
851 } else {
852 pdf_obj(p, p->engine.ps.pdfbody +
853 p->engine.ps.pages * 4);
854 ps_printf(p, "<<\n");
855 ps_printf(p, "/Length %zu 0 R\n",
856 p->engine.ps.pdfbody + 1 +
857 p->engine.ps.pages * 4);
858 ps_printf(p, ">>\nstream\n");
859 }
860 p->engine.ps.pdflastpg = p->engine.ps.pdfbytes;
861 p->engine.ps.flags &= ~PS_NEWPAGE;
862 }
863
864 /*
865 * If we're not in a PostScript "word" context, then open one
866 * now at the current cursor.
867 */
868
869 if ( ! (PS_INLINE & p->engine.ps.flags)) {
870 if (TERMTYPE_PS != p->type) {
871 ps_printf(p, "BT\n/F%d %zu Tf\n",
872 (int)p->engine.ps.lastf,
873 p->engine.ps.scale);
874 ps_printf(p, "%.3f %.3f Td\n(",
875 AFM2PNT(p, p->engine.ps.pscol),
876 AFM2PNT(p, p->engine.ps.psrow));
877 } else
878 ps_printf(p, "%.3f %.3f moveto\n(",
879 AFM2PNT(p, p->engine.ps.pscol),
880 AFM2PNT(p, p->engine.ps.psrow));
881 p->engine.ps.flags |= PS_INLINE;
882 }
883
884 assert( ! (PS_NEWPAGE & p->engine.ps.flags));
885
886 /*
887 * We need to escape these characters as per the PostScript
888 * specification. We would also escape non-graphable characters
889 * (like tabs), but none of them would get to this point and
890 * it's superfluous to abort() on them.
891 */
892
893 switch (c) {
894 case ('('):
895 /* FALLTHROUGH */
896 case (')'):
897 /* FALLTHROUGH */
898 case ('\\'):
899 ps_putchar(p, '\\');
900 break;
901 default:
902 break;
903 }
904
905 /* Write the character and adjust where we are on the page. */
906
907 f = (int)p->engine.ps.lastf;
908
909 if (c <= 32 || (c - 32 > MAXCHAR)) {
910 ps_putchar(p, ' ');
911 p->engine.ps.pscol += (size_t)fonts[f].gly[0].wx;
912 return;
913 }
914
915 ps_putchar(p, (char)c);
916 c -= 32;
917 p->engine.ps.pscol += (size_t)fonts[f].gly[c].wx;
918 }
919
920
921 static void
922 ps_pclose(struct termp *p)
923 {
924
925 /*
926 * Spit out that we're exiting a word context (this is a
927 * "partial close" because we don't check the last-char buffer
928 * or anything).
929 */
930
931 if ( ! (PS_INLINE & p->engine.ps.flags))
932 return;
933
934 if (TERMTYPE_PS != p->type) {
935 ps_printf(p, ") Tj\nET\n");
936 } else
937 ps_printf(p, ") show\n");
938
939 p->engine.ps.flags &= ~PS_INLINE;
940 }
941
942
943 static void
944 ps_fclose(struct termp *p)
945 {
946
947 /*
948 * Strong closure: if we have a last-char, spit it out after
949 * checking that we're in the right font mode. This will of
950 * course open a new scope, if applicable.
951 *
952 * Following this, close out any scope that's open.
953 */
954
955 if ('\0' != p->engine.ps.last) {
956 if (p->engine.ps.lastf != TERMFONT_NONE) {
957 ps_pclose(p);
958 ps_setfont(p, TERMFONT_NONE);
959 }
960 ps_pletter(p, p->engine.ps.last);
961 p->engine.ps.last = '\0';
962 }
963
964 if ( ! (PS_INLINE & p->engine.ps.flags))
965 return;
966
967 ps_pclose(p);
968 }
969
970
971 static void
972 ps_letter(struct termp *p, char c)
973 {
974 char cc;
975
976 /*
977 * State machine dictates whether to buffer the last character
978 * or not. Basically, encoded words are detected by checking if
979 * we're an "8" and switching on the buffer. Then we put "8" in
980 * our buffer, and on the next charater, flush both character
981 * and buffer. Thus, "regular" words are detected by having a
982 * regular character and a regular buffer character.
983 */
984
985 if ('\0' == p->engine.ps.last) {
986 assert(8 != c);
987 p->engine.ps.last = c;
988 return;
989 } else if (8 == p->engine.ps.last) {
990 assert(8 != c);
991 p->engine.ps.last = '\0';
992 } else if (8 == c) {
993 assert(8 != p->engine.ps.last);
994 if ('_' == p->engine.ps.last) {
995 if (p->engine.ps.lastf != TERMFONT_UNDER) {
996 ps_pclose(p);
997 ps_setfont(p, TERMFONT_UNDER);
998 }
999 } else if (p->engine.ps.lastf != TERMFONT_BOLD) {
1000 ps_pclose(p);
1001 ps_setfont(p, TERMFONT_BOLD);
1002 }
1003 p->engine.ps.last = c;
1004 return;
1005 } else {
1006 if (p->engine.ps.lastf != TERMFONT_NONE) {
1007 ps_pclose(p);
1008 ps_setfont(p, TERMFONT_NONE);
1009 }
1010 cc = p->engine.ps.last;
1011 p->engine.ps.last = c;
1012 c = cc;
1013 }
1014
1015 ps_pletter(p, c);
1016 }
1017
1018
1019 static void
1020 ps_advance(struct termp *p, size_t len)
1021 {
1022
1023 /*
1024 * Advance some spaces. This can probably be made smarter,
1025 * i.e., to have multiple space-separated words in the same
1026 * scope, but this is easier: just close out the current scope
1027 * and readjust our column settings.
1028 */
1029
1030 ps_fclose(p);
1031 p->engine.ps.pscol += len;
1032 }
1033
1034
1035 static void
1036 ps_endline(struct termp *p)
1037 {
1038
1039 /* Close out any scopes we have open: we're at eoln. */
1040
1041 ps_fclose(p);
1042
1043 /*
1044 * If we're in the margin, don't try to recalculate our current
1045 * row. XXX: if the column tries to be fancy with multiple
1046 * lines, we'll do nasty stuff.
1047 */
1048
1049 if (PS_MARGINS & p->engine.ps.flags)
1050 return;
1051
1052 /* Left-justify. */
1053
1054 p->engine.ps.pscol = p->engine.ps.left;
1055
1056 /* If we haven't printed anything, return. */
1057
1058 if (PS_NEWPAGE & p->engine.ps.flags)
1059 return;
1060
1061 /*
1062 * Put us down a line. If we're at the page bottom, spit out a
1063 * showpage and restart our row.
1064 */
1065
1066 if (p->engine.ps.psrow >= p->engine.ps.lineheight +
1067 p->engine.ps.bottom) {
1068 p->engine.ps.psrow -= p->engine.ps.lineheight;
1069 return;
1070 }
1071
1072 ps_closepage(p);
1073 }
1074
1075
1076 static void
1077 ps_setfont(struct termp *p, enum termfont f)
1078 {
1079
1080 assert(f < TERMFONT__MAX);
1081 p->engine.ps.lastf = f;
1082
1083 /*
1084 * If we're still at the top of the page, let the font-setting
1085 * be delayed until we actually have stuff to print.
1086 */
1087
1088 if (PS_NEWPAGE & p->engine.ps.flags)
1089 return;
1090
1091 if (TERMTYPE_PS == p->type)
1092 ps_printf(p, "/%s %zu selectfont\n",
1093 fonts[(int)f].name,
1094 p->engine.ps.scale);
1095 else
1096 ps_printf(p, "/F%d %zu Tf\n",
1097 (int)f,
1098 p->engine.ps.scale);
1099 }
1100
1101
1102 /* ARGSUSED */
1103 static size_t
1104 ps_width(const struct termp *p, char c)
1105 {
1106
1107 if (c <= 32 || c - 32 >= MAXCHAR)
1108 return((size_t)fonts[(int)TERMFONT_NONE].gly[0].wx);
1109
1110 c -= 32;
1111 return((size_t)fonts[(int)TERMFONT_NONE].gly[(int)c].wx);
1112 }
1113
1114
1115 static double
1116 ps_hspan(const struct termp *p, const struct roffsu *su)
1117 {
1118 double r;
1119
1120 /*
1121 * All of these measurements are derived by converting from the
1122 * native measurement to AFM units.
1123 */
1124
1125 switch (su->unit) {
1126 case (SCALE_CM):
1127 r = PNT2AFM(p, su->scale * 28.34);
1128 break;
1129 case (SCALE_IN):
1130 r = PNT2AFM(p, su->scale * 72);
1131 break;
1132 case (SCALE_PC):
1133 r = PNT2AFM(p, su->scale * 12);
1134 break;
1135 case (SCALE_PT):
1136 r = PNT2AFM(p, su->scale * 100);
1137 break;
1138 case (SCALE_EM):
1139 r = su->scale *
1140 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx;
1141 break;
1142 case (SCALE_MM):
1143 r = PNT2AFM(p, su->scale * 2.834);
1144 break;
1145 case (SCALE_EN):
1146 r = su->scale *
1147 fonts[(int)TERMFONT_NONE].gly[110 - 32].wx;
1148 break;
1149 case (SCALE_VS):
1150 r = su->scale * p->engine.ps.lineheight;
1151 break;
1152 default:
1153 r = su->scale;
1154 break;
1155 }
1156
1157 return(r);
1158 }
1159
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