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Backed out margin calculations in favour of much simpler rule of thumb:
[mandoc.git] / term_ps.c
1 /* $Id: term_ps.c,v 1.28 2010/07/04 19:24:00 kristaps Exp $ */
2 /*
3 * Copyright (c) 2008, 2009 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 #define MINMARGIN_MM 20 /* Minimum 2cm margins. */
37 #define MINMARGIN_PNT 56.68
38 #define DEFPAGEX_MM 216 /* Default page size is US-letter. */
39 #define DEFPAGEY_MM 279
40
41 /* Convert PostScript point "x" to an AFM unit. */
42 #define PNT2AFM(p, x) /* LINTED */ \
43 (size_t)((double)(x) * (1000.0 / (double)(p)->engine.ps.scale))
44
45 /* Convert an AFM unit "x" to a PostScript points */
46 #define AFM2PNT(p, x) /* LINTED */ \
47 (size_t)((double)(x) / (1000.0 / (double)(p)->engine.ps.scale))
48
49 struct glyph {
50 size_t wx; /* WX in AFM */
51 };
52
53 struct font {
54 const char *name; /* FontName in AFM */
55 #define MAXCHAR 95 /* total characters we can handle */
56 struct glyph gly[MAXCHAR]; /* glyph metrics */
57 };
58
59 /*
60 * We define, for the time being, three fonts: bold, oblique/italic, and
61 * normal (roman). The following table hard-codes the font metrics for
62 * ASCII, i.e., 32--127.
63 */
64
65 static const struct font fonts[TERMFONT__MAX] = {
66 { "Times-Roman", {
67 { 250 },
68 { 333 },
69 { 408 },
70 { 500 },
71 { 500 },
72 { 833 },
73 { 778 },
74 { 333 },
75 { 333 },
76 { 333 },
77 { 500 },
78 { 564 },
79 { 250 },
80 { 333 },
81 { 250 },
82 { 278 },
83 { 500 },
84 { 500 },
85 { 500 },
86 { 500 },
87 { 500 },
88 { 500 },
89 { 500 },
90 { 500 },
91 { 500 },
92 { 500 },
93 { 278 },
94 { 278 },
95 { 564 },
96 { 564 },
97 { 564 },
98 { 444 },
99 { 921 },
100 { 722 },
101 { 667 },
102 { 667 },
103 { 722 },
104 { 611 },
105 { 556 },
106 { 722 },
107 { 722 },
108 { 333 },
109 { 389 },
110 { 722 },
111 { 611 },
112 { 889 },
113 { 722 },
114 { 722 },
115 { 556 },
116 { 722 },
117 { 667 },
118 { 556 },
119 { 611 },
120 { 722 },
121 { 722 },
122 { 944 },
123 { 722 },
124 { 722 },
125 { 611 },
126 { 333 },
127 { 278 },
128 { 333 },
129 { 469 },
130 { 500 },
131 { 333 },
132 { 444 },
133 { 500 },
134 { 444 },
135 { 500},
136 { 444},
137 { 333},
138 { 500},
139 { 500},
140 { 278},
141 { 278},
142 { 500},
143 { 278},
144 { 778},
145 { 500},
146 { 500},
147 { 500},
148 { 500},
149 { 333},
150 { 389},
151 { 278},
152 { 500},
153 { 500},
154 { 722},
155 { 500},
156 { 500},
157 { 444},
158 { 480},
159 { 200},
160 { 480},
161 { 541},
162 } },
163 { "Times-Bold", {
164 { 250 },
165 { 333 },
166 { 555 },
167 { 500 },
168 { 500 },
169 { 1000 },
170 { 833 },
171 { 333 },
172 { 333 },
173 { 333 },
174 { 500 },
175 { 570 },
176 { 250 },
177 { 333 },
178 { 250 },
179 { 278 },
180 { 500 },
181 { 500 },
182 { 500 },
183 { 500 },
184 { 500 },
185 { 500 },
186 { 500 },
187 { 500 },
188 { 500 },
189 { 500 },
190 { 333 },
191 { 333 },
192 { 570 },
193 { 570 },
194 { 570 },
195 { 500 },
196 { 930 },
197 { 722 },
198 { 667 },
199 { 722 },
200 { 722 },
201 { 667 },
202 { 611 },
203 { 778 },
204 { 778 },
205 { 389 },
206 { 500 },
207 { 778 },
208 { 667 },
209 { 944 },
210 { 722 },
211 { 778 },
212 { 611 },
213 { 778 },
214 { 722 },
215 { 556 },
216 { 667 },
217 { 722 },
218 { 722 },
219 { 1000 },
220 { 722 },
221 { 722 },
222 { 667 },
223 { 333 },
224 { 278 },
225 { 333 },
226 { 581 },
227 { 500 },
228 { 333 },
229 { 500 },
230 { 556 },
231 { 444 },
232 { 556 },
233 { 444 },
234 { 333 },
235 { 500 },
236 { 556 },
237 { 278 },
238 { 333 },
239 { 556 },
240 { 278 },
241 { 833 },
242 { 556 },
243 { 500 },
244 { 556 },
245 { 556 },
246 { 444 },
247 { 389 },
248 { 333 },
249 { 556 },
250 { 500 },
251 { 722 },
252 { 500 },
253 { 500 },
254 { 444 },
255 { 394 },
256 { 220 },
257 { 394 },
258 { 520 },
259 } },
260 { "Times-Italic", {
261 { 250 },
262 { 333 },
263 { 420 },
264 { 500 },
265 { 500 },
266 { 833 },
267 { 778 },
268 { 333 },
269 { 333 },
270 { 333 },
271 { 500 },
272 { 675 },
273 { 250 },
274 { 333 },
275 { 250 },
276 { 278 },
277 { 500 },
278 { 500 },
279 { 500 },
280 { 500 },
281 { 500 },
282 { 500 },
283 { 500 },
284 { 500 },
285 { 500 },
286 { 500 },
287 { 333 },
288 { 333 },
289 { 675 },
290 { 675 },
291 { 675 },
292 { 500 },
293 { 920 },
294 { 611 },
295 { 611 },
296 { 667 },
297 { 722 },
298 { 611 },
299 { 611 },
300 { 722 },
301 { 722 },
302 { 333 },
303 { 444 },
304 { 667 },
305 { 556 },
306 { 833 },
307 { 667 },
308 { 722 },
309 { 611 },
310 { 722 },
311 { 611 },
312 { 500 },
313 { 556 },
314 { 722 },
315 { 611 },
316 { 833 },
317 { 611 },
318 { 556 },
319 { 556 },
320 { 389 },
321 { 278 },
322 { 389 },
323 { 422 },
324 { 500 },
325 { 333 },
326 { 500 },
327 { 500 },
328 { 444 },
329 { 500 },
330 { 444 },
331 { 278 },
332 { 500 },
333 { 500 },
334 { 278 },
335 { 278 },
336 { 444 },
337 { 278 },
338 { 722 },
339 { 500 },
340 { 500 },
341 { 500 },
342 { 500 },
343 { 389 },
344 { 389 },
345 { 278 },
346 { 500 },
347 { 444 },
348 { 667 },
349 { 444 },
350 { 444 },
351 { 389 },
352 { 400 },
353 { 275 },
354 { 400 },
355 { 541 },
356 } },
357 };
358
359 /* These work the buffer used by the header and footer. */
360 #define PS_BUFSLOP 128
361 #define PS_GROWBUF(p, sz) \
362 do if ((p)->engine.ps.psmargcur + (sz) > \
363 (p)->engine.ps.psmargsz) { \
364 (p)->engine.ps.psmargsz += /* CONSTCOND */ \
365 MAX(PS_BUFSLOP, (sz)); \
366 (p)->engine.ps.psmarg = realloc \
367 ((p)->engine.ps.psmarg, \
368 (p)->engine.ps.psmargsz); \
369 if (NULL == (p)->engine.ps.psmarg) { \
370 perror(NULL); \
371 exit(EXIT_FAILURE); \
372 } \
373 } while (/* CONSTCOND */ 0)
374
375
376 static double ps_hspan(const struct termp *,
377 const struct roffsu *);
378 static size_t ps_width(const struct termp *, char);
379 static void ps_advance(struct termp *, size_t);
380 static void ps_begin(struct termp *);
381 static void ps_end(struct termp *);
382 static void ps_endline(struct termp *);
383 static void ps_fclose(struct termp *);
384 static void ps_letter(struct termp *, char);
385 static void ps_pclose(struct termp *);
386 static void ps_pletter(struct termp *, int);
387 static void ps_printf(struct termp *, const char *, ...);
388 static void ps_putchar(struct termp *, char);
389 static void ps_setfont(struct termp *, enum termfont);
390
391
392 void *
393 ps_alloc(char *outopts)
394 {
395 struct termp *p;
396 size_t pagex, pagey, marginx, marginy, lineheight;
397 const char *toks[2];
398 const char *pp;
399 char *v;
400
401 if (NULL == (p = term_alloc(TERMENC_ASCII)))
402 return(NULL);
403
404 p->advance = ps_advance;
405 p->begin = ps_begin;
406 p->end = ps_end;
407 p->endline = ps_endline;
408 p->hspan = ps_hspan;
409 p->letter = ps_letter;
410 p->type = TERMTYPE_PS;
411 p->width = ps_width;
412
413 toks[0] = "paper";
414 toks[1] = NULL;
415
416 pp = NULL;
417
418 while (outopts && *outopts)
419 switch (getsubopt(&outopts, UNCONST(toks), &v)) {
420 case (0):
421 pp = v;
422 break;
423 default:
424 break;
425 }
426
427 /* Default to US letter (millimetres). */
428
429 pagex = DEFPAGEX_MM;
430 pagey = DEFPAGEY_MM;
431
432 /*
433 * The ISO-269 paper sizes can be calculated automatically, but
434 * it would require bringing in -lm for pow() and I'd rather not
435 * do that. So just do it the easy way for now. Since this
436 * only happens once, I'm not terribly concerned.
437 */
438
439 if (pp && strcasecmp(pp, "letter")) {
440 if (0 == strcasecmp(pp, "a3")) {
441 pagex = 297;
442 pagey = 420;
443 } else if (0 == strcasecmp(pp, "a4")) {
444 pagex = 210;
445 pagey = 297;
446 } else if (0 == strcasecmp(pp, "a5")) {
447 pagex = 148;
448 pagey = 210;
449 } else if (0 == strcasecmp(pp, "legal")) {
450 pagex = 216;
451 pagey = 356;
452 } else if (2 != sscanf(pp, "%zux%zu", &pagex, &pagey))
453 fprintf(stderr, "%s: Unknown paper\n", pp);
454 } else if (NULL == pp)
455 pp = "letter";
456
457 /* Enforce minimum page size >= (2 times) min-margin. */
458
459 if ((2 * MINMARGIN_MM) >= pagex) {
460 fprintf(stderr, "%s: Insufficient page width\n", pp);
461 pagex = DEFPAGEX_MM;
462 } else if ((2 * MINMARGIN_MM >= pagey)) {
463 fprintf(stderr, "%s: Insufficient page length\n", pp);
464 pagey = DEFPAGEY_MM;
465 }
466
467 /*
468 * This MUST be defined before any PNT2AFM or AFM2PNT
469 * calculations occur.
470 */
471
472 p->engine.ps.scale = 11;
473
474 /* Remember millimetres -> AFM units. */
475
476 pagex = PNT2AFM(p, ((double)pagex * 2.834));
477 pagey = PNT2AFM(p, ((double)pagey * 2.834));
478
479 /* Margins are 1/9 the page x and y. */
480
481 marginx = (size_t)((double)pagex / 9.0);
482 marginy = (size_t)((double)pagey / 9.0);
483
484 lineheight = PNT2AFM(p, 16);
485
486 p->engine.ps.width = pagex;
487 p->engine.ps.height = pagey;
488 p->engine.ps.header = pagey - (marginy / 2) - (lineheight / 2);
489 p->engine.ps.top = pagey - marginy;
490 p->engine.ps.footer = (marginy / 2) - (lineheight / 2);
491 p->engine.ps.bottom = marginy;
492 p->engine.ps.left = marginx;
493 p->engine.ps.lineheight = lineheight;
494
495 p->defrmargin = pagex - (marginx * 2);
496 return(p);
497 }
498
499
500 void
501 ps_free(void *arg)
502 {
503 struct termp *p;
504
505 p = (struct termp *)arg;
506
507 if (p->engine.ps.psmarg)
508 free(p->engine.ps.psmarg);
509
510 term_free(p);
511 }
512
513
514 static void
515 ps_printf(struct termp *p, const char *fmt, ...)
516 {
517 va_list ap;
518 int pos;
519
520 va_start(ap, fmt);
521
522 /*
523 * If we're running in regular mode, then pipe directly into
524 * vprintf(). If we're processing margins, then push the data
525 * into our growable margin buffer.
526 */
527
528 if ( ! (PS_MARGINS & p->engine.ps.psstate)) {
529 vprintf(fmt, ap);
530 va_end(ap);
531 return;
532 }
533
534 /*
535 * XXX: I assume that the in-margin print won't exceed
536 * PS_BUFSLOP (128 bytes), which is reasonable but still an
537 * assumption that will cause pukeage if it's not the case.
538 */
539
540 PS_GROWBUF(p, PS_BUFSLOP);
541
542 pos = (int)p->engine.ps.psmargcur;
543 vsnprintf(&p->engine.ps.psmarg[pos], PS_BUFSLOP, fmt, ap);
544 p->engine.ps.psmargcur = strlen(p->engine.ps.psmarg);
545
546 va_end(ap);
547 }
548
549
550 static void
551 ps_putchar(struct termp *p, char c)
552 {
553 int pos;
554
555 /* See ps_printf(). */
556
557 if ( ! (PS_MARGINS & p->engine.ps.psstate)) {
558 putchar(c);
559 return;
560 }
561
562 PS_GROWBUF(p, 2);
563
564 pos = (int)p->engine.ps.psmargcur++;
565 p->engine.ps.psmarg[pos++] = c;
566 p->engine.ps.psmarg[pos] = '\0';
567 }
568
569
570 /* ARGSUSED */
571 static void
572 ps_end(struct termp *p)
573 {
574
575 /*
576 * At the end of the file, do one last showpage. This is the
577 * same behaviour as groff(1) and works for multiple pages as
578 * well as just one.
579 */
580
581 assert(0 == p->engine.ps.psstate);
582 assert('\0' == p->engine.ps.last);
583 assert(p->engine.ps.psmarg && p->engine.ps.psmarg[0]);
584 printf("%s", p->engine.ps.psmarg);
585 p->engine.ps.pages++;
586 printf("showpage\n");
587
588 printf("%%%%Trailer\n");
589 printf("%%%%Pages: %zu\n", p->engine.ps.pages);
590 printf("%%%%EOF\n");
591 }
592
593
594 static void
595 ps_begin(struct termp *p)
596 {
597 time_t t;
598 int i;
599
600 /*
601 * Print margins into margin buffer. Nothing gets output to the
602 * screen yet, so we don't need to initialise the primary state.
603 */
604
605 if (p->engine.ps.psmarg) {
606 assert(p->engine.ps.psmargsz);
607 p->engine.ps.psmarg[0] = '\0';
608 }
609
610 p->engine.ps.psmargcur = 0;
611 p->engine.ps.psstate = PS_MARGINS;
612 p->engine.ps.pscol = p->engine.ps.left;
613 p->engine.ps.psrow = p->engine.ps.header;
614
615 ps_setfont(p, TERMFONT_NONE);
616
617 (*p->headf)(p, p->argf);
618 (*p->endline)(p);
619
620 p->engine.ps.pscol = p->engine.ps.left;
621 p->engine.ps.psrow = p->engine.ps.footer;
622
623 (*p->footf)(p, p->argf);
624 (*p->endline)(p);
625
626 p->engine.ps.psstate &= ~PS_MARGINS;
627
628 assert(0 == p->engine.ps.psstate);
629 assert(p->engine.ps.psmarg);
630 assert('\0' != p->engine.ps.psmarg[0]);
631
632 /*
633 * Print header and initialise page state. Following this,
634 * stuff gets printed to the screen, so make sure we're sane.
635 */
636
637 t = time(NULL);
638
639 printf("%%!PS-Adobe-3.0\n");
640 printf("%%%%Creator: mandoc-%s\n", VERSION);
641 printf("%%%%CreationDate: %s", ctime(&t));
642 printf("%%%%DocumentData: Clean7Bit\n");
643 printf("%%%%Orientation: Portrait\n");
644 printf("%%%%Pages: (atend)\n");
645 printf("%%%%PageOrder: Ascend\n");
646 printf("%%%%DocumentMedia: Default %zu %zu 0 () ()\n",
647 AFM2PNT(p, p->engine.ps.width),
648 AFM2PNT(p, p->engine.ps.height));
649 printf("%%%%DocumentNeededResources: font");
650 for (i = 0; i < (int)TERMFONT__MAX; i++)
651 printf(" %s", fonts[i].name);
652 printf("\n%%%%EndComments\n");
653
654 printf("%%%%Page: %zu %zu\n",
655 p->engine.ps.pages + 1,
656 p->engine.ps.pages + 1);
657
658 ps_setfont(p, TERMFONT_NONE);
659 p->engine.ps.pscol = p->engine.ps.left;
660 p->engine.ps.psrow = p->engine.ps.top;
661 }
662
663
664 static void
665 ps_pletter(struct termp *p, int c)
666 {
667 int f;
668
669 /*
670 * If we're not in a PostScript "word" context, then open one
671 * now at the current cursor.
672 */
673
674 if ( ! (PS_INLINE & p->engine.ps.psstate)) {
675 ps_printf(p, "%zu %zu moveto\n(",
676 AFM2PNT(p, p->engine.ps.pscol),
677 AFM2PNT(p, p->engine.ps.psrow));
678 p->engine.ps.psstate |= PS_INLINE;
679 }
680
681 /*
682 * We need to escape these characters as per the PostScript
683 * specification. We would also escape non-graphable characters
684 * (like tabs), but none of them would get to this point and
685 * it's superfluous to abort() on them.
686 */
687
688 switch (c) {
689 case ('('):
690 /* FALLTHROUGH */
691 case (')'):
692 /* FALLTHROUGH */
693 case ('\\'):
694 ps_putchar(p, '\\');
695 break;
696 default:
697 break;
698 }
699
700 /* Write the character and adjust where we are on the page. */
701
702 f = (int)p->engine.ps.lastf;
703
704 if (c <= 32 || (c - 32 > MAXCHAR)) {
705 ps_putchar(p, ' ');
706 p->engine.ps.pscol += fonts[f].gly[0].wx;
707 return;
708 }
709
710 ps_putchar(p, (char)c);
711 c -= 32;
712 p->engine.ps.pscol += fonts[f].gly[c].wx;
713 }
714
715
716 static void
717 ps_pclose(struct termp *p)
718 {
719
720 /*
721 * Spit out that we're exiting a word context (this is a
722 * "partial close" because we don't check the last-char buffer
723 * or anything).
724 */
725
726 if ( ! (PS_INLINE & p->engine.ps.psstate))
727 return;
728
729 ps_printf(p, ") show\n");
730 p->engine.ps.psstate &= ~PS_INLINE;
731 }
732
733
734 static void
735 ps_fclose(struct termp *p)
736 {
737
738 /*
739 * Strong closure: if we have a last-char, spit it out after
740 * checking that we're in the right font mode. This will of
741 * course open a new scope, if applicable.
742 *
743 * Following this, close out any scope that's open.
744 */
745
746 if ('\0' != p->engine.ps.last) {
747 if (p->engine.ps.lastf != TERMFONT_NONE) {
748 ps_pclose(p);
749 ps_setfont(p, TERMFONT_NONE);
750 }
751 ps_pletter(p, p->engine.ps.last);
752 p->engine.ps.last = '\0';
753 }
754
755 if ( ! (PS_INLINE & p->engine.ps.psstate))
756 return;
757
758 ps_pclose(p);
759 }
760
761
762 static void
763 ps_letter(struct termp *p, char c)
764 {
765 char cc;
766
767 /*
768 * State machine dictates whether to buffer the last character
769 * or not. Basically, encoded words are detected by checking if
770 * we're an "8" and switching on the buffer. Then we put "8" in
771 * our buffer, and on the next charater, flush both character
772 * and buffer. Thus, "regular" words are detected by having a
773 * regular character and a regular buffer character.
774 */
775
776 if ('\0' == p->engine.ps.last) {
777 assert(8 != c);
778 p->engine.ps.last = c;
779 return;
780 } else if (8 == p->engine.ps.last) {
781 assert(8 != c);
782 p->engine.ps.last = '\0';
783 } else if (8 == c) {
784 assert(8 != p->engine.ps.last);
785 if ('_' == p->engine.ps.last) {
786 if (p->engine.ps.lastf != TERMFONT_UNDER) {
787 ps_pclose(p);
788 ps_setfont(p, TERMFONT_UNDER);
789 }
790 } else if (p->engine.ps.lastf != TERMFONT_BOLD) {
791 ps_pclose(p);
792 ps_setfont(p, TERMFONT_BOLD);
793 }
794 p->engine.ps.last = c;
795 return;
796 } else {
797 if (p->engine.ps.lastf != TERMFONT_NONE) {
798 ps_pclose(p);
799 ps_setfont(p, TERMFONT_NONE);
800 }
801 cc = p->engine.ps.last;
802 p->engine.ps.last = c;
803 c = cc;
804 }
805
806 ps_pletter(p, c);
807 }
808
809
810 static void
811 ps_advance(struct termp *p, size_t len)
812 {
813
814 /*
815 * Advance some spaces. This can probably be made smarter,
816 * i.e., to have multiple space-separated words in the same
817 * scope, but this is easier: just close out the current scope
818 * and readjust our column settings.
819 */
820
821 ps_fclose(p);
822 p->engine.ps.pscol += len;
823 }
824
825
826 static void
827 ps_endline(struct termp *p)
828 {
829
830 /* Close out any scopes we have open: we're at eoln. */
831
832 ps_fclose(p);
833
834 /*
835 * If we're in the margin, don't try to recalculate our current
836 * row. XXX: if the column tries to be fancy with multiple
837 * lines, we'll do nasty stuff.
838 */
839
840 if (PS_MARGINS & p->engine.ps.psstate)
841 return;
842
843 /*
844 * Put us down a line. If we're at the page bottom, spit out a
845 * showpage and restart our row.
846 */
847
848 p->engine.ps.pscol = p->engine.ps.left;
849 if (p->engine.ps.psrow >= p->engine.ps.lineheight +
850 p->engine.ps.bottom) {
851 p->engine.ps.psrow -= p->engine.ps.lineheight;
852 return;
853 }
854
855 assert(p->engine.ps.psmarg && p->engine.ps.psmarg[0]);
856 printf("%s", p->engine.ps.psmarg);
857 printf("showpage\n");
858 p->engine.ps.pages++;
859 printf("%%%%Page: %zu %zu\n",
860 p->engine.ps.pages + 1,
861 p->engine.ps.pages + 1);
862 p->engine.ps.psrow = p->engine.ps.top;
863 }
864
865
866 static void
867 ps_setfont(struct termp *p, enum termfont f)
868 {
869
870 assert(f < TERMFONT__MAX);
871 ps_printf(p, "/%s %zu selectfont\n",
872 fonts[(int)f].name, p->engine.ps.scale);
873 p->engine.ps.lastf = f;
874 }
875
876
877 /* ARGSUSED */
878 static size_t
879 ps_width(const struct termp *p, char c)
880 {
881
882 if (c <= 32 || c - 32 >= MAXCHAR)
883 return(fonts[(int)TERMFONT_NONE].gly[0].wx);
884
885 c -= 32;
886 return(fonts[(int)TERMFONT_NONE].gly[(int)c].wx);
887 }
888
889
890 static double
891 ps_hspan(const struct termp *p, const struct roffsu *su)
892 {
893 double r;
894
895 /*
896 * All of these measurements are derived by converting from the
897 * native measurement to AFM units.
898 */
899
900 switch (su->unit) {
901 case (SCALE_CM):
902 r = PNT2AFM(p, su->scale * 28.34);
903 break;
904 case (SCALE_IN):
905 r = PNT2AFM(p, su->scale * 72);
906 break;
907 case (SCALE_PC):
908 r = PNT2AFM(p, su->scale * 12);
909 break;
910 case (SCALE_PT):
911 r = PNT2AFM(p, su->scale * 100);
912 break;
913 case (SCALE_EM):
914 r = su->scale *
915 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx;
916 break;
917 case (SCALE_MM):
918 r = PNT2AFM(p, su->scale * 2.834);
919 break;
920 case (SCALE_EN):
921 r = su->scale *
922 fonts[(int)TERMFONT_NONE].gly[110 - 32].wx;
923 break;
924 case (SCALE_VS):
925 r = su->scale * p->engine.ps.lineheight;
926 break;
927 default:
928 r = su->scale;
929 break;
930 }
931
932 return(r);
933 }
934
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