Annotation of mandoc/term_ps.c, Revision 1.25
1.25 ! kristaps 1: /* $Id: term_ps.c,v 1.24 2010/06/30 20:57:41 kristaps Exp $ */
1.1 kristaps 2: /*
1.10 kristaps 3: * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@bsd.lv>
1.1 kristaps 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:
1.4 kristaps 21: #include <sys/param.h>
22:
1.2 kristaps 23: #include <assert.h>
1.4 kristaps 24: #include <stdarg.h>
1.17 kristaps 25: #include <stdint.h>
1.2 kristaps 26: #include <stdio.h>
1.1 kristaps 27: #include <stdlib.h>
1.4 kristaps 28: #include <string.h>
1.13 kristaps 29: #include <time.h>
1.1 kristaps 30:
31: #include "out.h"
32: #include "main.h"
33: #include "term.h"
34:
1.21 kristaps 35: /* Convert PostScript point "x" to an AFM unit. */
1.25 ! kristaps 36: #define PNT2AFM(p, x) /* LINTED */ \
1.21 kristaps 37: (size_t)((double)(x) * (1000.0 / (double)(p)->engine.ps.scale))
38:
39: /* Convert an AFM unit "x" to a PostScript points */
1.25 ! kristaps 40: #define AFM2PNT(p, x) /* LINTED */ \
1.21 kristaps 41: (size_t)((double)(x) / (1000.0 / (double)(p)->engine.ps.scale))
42:
1.13 kristaps 43: struct glyph {
1.25 ! kristaps 44: size_t wx; /* WX in AFM */
1.13 kristaps 45: };
46:
47: struct font {
48: const char *name; /* FontName in AFM */
1.15 kristaps 49: #define MAXCHAR 95 /* total characters we can handle */
1.13 kristaps 50: struct glyph gly[MAXCHAR]; /* glyph metrics */
51: };
52:
53: /*
54: * We define, for the time being, three fonts: bold, oblique/italic, and
55: * normal (roman). The following table hard-codes the font metrics for
56: * ASCII, i.e., 32--127.
57: */
58:
1.16 kristaps 59: static const struct font fonts[TERMFONT__MAX] = {
1.24 kristaps 60: { "Times-Roman", {
61: { 250 },
62: { 333 },
63: { 408 },
64: { 500 },
65: { 500 },
66: { 833 },
67: { 778 },
68: { 333 },
69: { 333 },
70: { 333 },
71: { 500 },
72: { 564 },
73: { 250 },
74: { 333 },
75: { 250 },
76: { 278 },
77: { 500 },
78: { 500 },
79: { 500 },
80: { 500 },
81: { 500 },
82: { 500 },
83: { 500 },
84: { 500 },
85: { 500 },
86: { 500 },
87: { 278 },
88: { 278 },
89: { 564 },
90: { 564 },
91: { 564 },
92: { 444 },
93: { 921 },
94: { 722 },
95: { 667 },
96: { 667 },
97: { 722 },
98: { 611 },
99: { 556 },
100: { 722 },
101: { 722 },
102: { 333 },
103: { 389 },
104: { 722 },
105: { 611 },
106: { 889 },
107: { 722 },
108: { 722 },
109: { 556 },
110: { 722 },
111: { 667 },
112: { 556 },
113: { 611 },
114: { 722 },
115: { 722 },
116: { 944 },
117: { 722 },
118: { 722 },
119: { 611 },
120: { 333 },
121: { 278 },
122: { 333 },
123: { 469 },
124: { 500 },
125: { 333 },
126: { 444 },
127: { 500 },
128: { 444 },
129: { 500},
130: { 444},
131: { 333},
132: { 500},
133: { 500},
134: { 278},
135: { 278},
136: { 500},
137: { 278},
138: { 778},
139: { 500},
140: { 500},
141: { 500},
142: { 500},
143: { 333},
144: { 389},
145: { 278},
146: { 500},
147: { 500},
148: { 722},
149: { 500},
150: { 500},
151: { 444},
152: { 480},
153: { 200},
154: { 480},
155: { 541},
156: } },
157: { "Times-Bold", {
158: { 250 },
159: { 333 },
160: { 555 },
161: { 500 },
162: { 500 },
163: { 1000 },
164: { 833 },
165: { 333 },
166: { 333 },
167: { 333 },
168: { 500 },
169: { 570 },
170: { 250 },
171: { 333 },
172: { 250 },
173: { 278 },
174: { 500 },
175: { 500 },
176: { 500 },
177: { 500 },
178: { 500 },
179: { 500 },
180: { 500 },
181: { 500 },
182: { 500 },
183: { 500 },
184: { 333 },
185: { 333 },
186: { 570 },
187: { 570 },
188: { 570 },
189: { 500 },
190: { 930 },
191: { 722 },
192: { 667 },
193: { 722 },
194: { 722 },
195: { 667 },
196: { 611 },
197: { 778 },
198: { 778 },
199: { 389 },
200: { 500 },
201: { 778 },
202: { 667 },
203: { 944 },
204: { 722 },
205: { 778 },
206: { 611 },
207: { 778 },
208: { 722 },
209: { 556 },
210: { 667 },
211: { 722 },
212: { 722 },
213: { 1000 },
214: { 722 },
215: { 722 },
216: { 667 },
217: { 333 },
218: { 278 },
219: { 333 },
220: { 581 },
221: { 500 },
222: { 333 },
223: { 500 },
224: { 556 },
225: { 444 },
1.22 kristaps 226: { 556 },
1.24 kristaps 227: { 444 },
228: { 333 },
1.22 kristaps 229: { 500 },
1.24 kristaps 230: { 556 },
1.22 kristaps 231: { 278 },
1.24 kristaps 232: { 333 },
233: { 556 },
1.22 kristaps 234: { 278 },
1.24 kristaps 235: { 833 },
1.22 kristaps 236: { 556 },
1.24 kristaps 237: { 500 },
1.22 kristaps 238: { 556 },
239: { 556 },
240: { 444 },
1.24 kristaps 241: { 389 },
242: { 333 },
1.22 kristaps 243: { 556 },
244: { 500 },
1.24 kristaps 245: { 722 },
246: { 500 },
1.22 kristaps 247: { 500 },
1.24 kristaps 248: { 444 },
249: { 394 },
250: { 220 },
251: { 394 },
252: { 520 },
1.13 kristaps 253: } },
1.24 kristaps 254: { "Times-Italic", {
255: { 250 },
256: { 333 },
257: { 420 },
258: { 500 },
259: { 500 },
260: { 833 },
261: { 778 },
262: { 333 },
263: { 333 },
264: { 333 },
265: { 500 },
266: { 675 },
267: { 250 },
268: { 333 },
269: { 250 },
270: { 278 },
271: { 500 },
272: { 500 },
273: { 500 },
274: { 500 },
275: { 500 },
276: { 500 },
277: { 500 },
278: { 500 },
279: { 500 },
280: { 500 },
281: { 333 },
282: { 333 },
283: { 675 },
284: { 675 },
285: { 675 },
286: { 500 },
287: { 920 },
288: { 611 },
289: { 611 },
290: { 667 },
291: { 722 },
292: { 611 },
293: { 611 },
294: { 722 },
295: { 722 },
296: { 333 },
297: { 444 },
298: { 667 },
299: { 556 },
300: { 833 },
301: { 667 },
302: { 722 },
303: { 611 },
304: { 722 },
305: { 611 },
306: { 500 },
307: { 556 },
308: { 722 },
309: { 611 },
310: { 833 },
311: { 611 },
312: { 556 },
313: { 556 },
314: { 389 },
315: { 278 },
316: { 389 },
317: { 422 },
318: { 500 },
319: { 333 },
320: { 500 },
321: { 500 },
322: { 444 },
1.22 kristaps 323: { 500 },
1.24 kristaps 324: { 444 },
325: { 278 },
1.22 kristaps 326: { 500 },
327: { 500 },
328: { 278 },
1.24 kristaps 329: { 278 },
330: { 444 },
331: { 278 },
332: { 722 },
333: { 500 },
334: { 500 },
335: { 500 },
1.22 kristaps 336: { 500 },
1.24 kristaps 337: { 389 },
338: { 389 },
1.22 kristaps 339: { 278 },
340: { 500 },
1.24 kristaps 341: { 444 },
342: { 667 },
343: { 444 },
344: { 444 },
345: { 389 },
346: { 400 },
1.22 kristaps 347: { 275 },
1.24 kristaps 348: { 400 },
349: { 541 },
1.13 kristaps 350: } },
351: };
352:
1.15 kristaps 353: /* These work the buffer used by the header and footer. */
1.4 kristaps 354: #define PS_BUFSLOP 128
355: #define PS_GROWBUF(p, sz) \
356: do if ((p)->engine.ps.psmargcur + (sz) > \
357: (p)->engine.ps.psmargsz) { \
358: (p)->engine.ps.psmargsz += /* CONSTCOND */ \
359: MAX(PS_BUFSLOP, (sz)); \
360: (p)->engine.ps.psmarg = realloc \
361: ((p)->engine.ps.psmarg, \
362: (p)->engine.ps.psmargsz); \
363: if (NULL == (p)->engine.ps.psmarg) { \
364: perror(NULL); \
365: exit(EXIT_FAILURE); \
366: } \
367: } while (/* CONSTCOND */ 0)
368:
1.9 kristaps 369:
1.20 kristaps 370: static double ps_hspan(const struct termp *,
1.19 kristaps 371: const struct roffsu *);
372: static size_t ps_width(const struct termp *, char);
373: static void ps_advance(struct termp *, size_t);
1.2 kristaps 374: static void ps_begin(struct termp *);
375: static void ps_end(struct termp *);
376: static void ps_endline(struct termp *);
1.9 kristaps 377: static void ps_fclose(struct termp *);
1.19 kristaps 378: static void ps_letter(struct termp *, char);
1.9 kristaps 379: static void ps_pclose(struct termp *);
1.13 kristaps 380: static void ps_pletter(struct termp *, int);
1.4 kristaps 381: static void ps_printf(struct termp *, const char *, ...);
382: static void ps_putchar(struct termp *, char);
1.9 kristaps 383: static void ps_setfont(struct termp *, enum termfont);
1.2 kristaps 384:
385:
1.1 kristaps 386: void *
1.17 kristaps 387: ps_alloc(char *outopts)
1.1 kristaps 388: {
389: struct termp *p;
1.18 kristaps 390: size_t pagex, pagey, margin, lineheight;
1.17 kristaps 391: const char *toks[2];
1.25 ! kristaps 392: const char *pp;
1.17 kristaps 393: char *v;
1.1 kristaps 394:
395: if (NULL == (p = term_alloc(TERMENC_ASCII)))
396: return(NULL);
397:
1.19 kristaps 398: p->advance = ps_advance;
1.2 kristaps 399: p->begin = ps_begin;
400: p->end = ps_end;
401: p->endline = ps_endline;
1.19 kristaps 402: p->hspan = ps_hspan;
403: p->letter = ps_letter;
404: p->type = TERMTYPE_PS;
1.11 kristaps 405: p->width = ps_width;
1.21 kristaps 406:
1.25 ! kristaps 407: p->engine.ps.scale = 11;
1.17 kristaps 408:
409: toks[0] = "paper";
410: toks[1] = NULL;
411:
1.25 ! kristaps 412: pp = NULL;
1.19 kristaps 413:
1.17 kristaps 414: while (outopts && *outopts)
415: switch (getsubopt(&outopts, UNCONST(toks), &v)) {
416: case (0):
1.25 ! kristaps 417: pp = v;
1.17 kristaps 418: break;
419: default:
420: break;
421: }
1.16 kristaps 422:
1.21 kristaps 423: margin = PNT2AFM(p, 72);
424: lineheight = PNT2AFM(p, 12);
425:
1.25 ! kristaps 426: /* Default to US letter (millimetres). */
! 427:
! 428: pagex = 216;
! 429: pagey = 279;
! 430:
! 431: /*
! 432: * The ISO-269 paper sizes can be calculated automatically, but
! 433: * it would require bringing in -lm for pow() and I'd rather not
! 434: * do that. So just do it the easy way for now. Since this
! 435: * only happens once, I'm not terribly concerned.
! 436: */
! 437:
! 438: if (pp && strcasecmp(pp, "letter")) {
! 439: if (0 == strcasecmp(pp, "a3")) {
! 440: pagex = 297;
! 441: pagey = 420;
! 442: } else if (0 == strcasecmp(pp, "a4")) {
! 443: pagex = 210;
! 444: pagey = 297;
! 445: } else if (0 == strcasecmp(pp, "a5")) {
! 446: pagex = 148;
! 447: pagey = 210;
! 448: } else if (0 == strcasecmp(pp, "legal")) {
! 449: pagex = 216;
! 450: pagey = 356;
! 451: } else if (2 != sscanf(pp, "%zux%zu", &pagex, &pagey))
! 452: fprintf(stderr, "%s: Unknown paper\n", pp);
1.18 kristaps 453: }
454:
1.25 ! kristaps 455: /* Remember millimetres -> AFM units. */
! 456:
! 457: pagex = PNT2AFM(p, ((double)pagex * 2.834));
! 458: pagey = PNT2AFM(p, ((double)pagey * 2.834));
! 459:
1.16 kristaps 460: assert(margin * 2 < pagex);
461: assert(margin * 2 < pagey);
462:
463: p->engine.ps.width = pagex;
464: p->engine.ps.height = pagey;
465: p->engine.ps.header = pagey - (margin / 2);
466: p->engine.ps.top = pagey - margin;
467: p->engine.ps.footer = (margin / 2);
468: p->engine.ps.bottom = margin;
469: p->engine.ps.left = margin;
1.18 kristaps 470: p->engine.ps.lineheight = lineheight;
1.16 kristaps 471:
472: p->defrmargin = pagex - (margin * 2);
1.1 kristaps 473: return(p);
474: }
475:
476:
477: void
478: ps_free(void *arg)
479: {
1.4 kristaps 480: struct termp *p;
481:
482: p = (struct termp *)arg;
483:
484: if (p->engine.ps.psmarg)
485: free(p->engine.ps.psmarg);
486:
487: term_free(p);
488: }
489:
490:
491: static void
492: ps_printf(struct termp *p, const char *fmt, ...)
493: {
494: va_list ap;
495: int pos;
496:
497: va_start(ap, fmt);
498:
499: /*
500: * If we're running in regular mode, then pipe directly into
501: * vprintf(). If we're processing margins, then push the data
502: * into our growable margin buffer.
503: */
1.1 kristaps 504:
1.4 kristaps 505: if ( ! (PS_MARGINS & p->engine.ps.psstate)) {
506: vprintf(fmt, ap);
507: va_end(ap);
508: return;
509: }
510:
511: /*
512: * XXX: I assume that the in-margin print won't exceed
513: * PS_BUFSLOP (128 bytes), which is reasonable but still an
514: * assumption that will cause pukeage if it's not the case.
515: */
516:
517: PS_GROWBUF(p, PS_BUFSLOP);
518:
519: pos = (int)p->engine.ps.psmargcur;
520: vsnprintf(&p->engine.ps.psmarg[pos], PS_BUFSLOP, fmt, ap);
521: p->engine.ps.psmargcur = strlen(p->engine.ps.psmarg);
1.5 kristaps 522:
523: va_end(ap);
1.4 kristaps 524: }
525:
526:
527: static void
528: ps_putchar(struct termp *p, char c)
529: {
530: int pos;
531:
532: /* See ps_printf(). */
533:
534: if ( ! (PS_MARGINS & p->engine.ps.psstate)) {
535: putchar(c);
536: return;
537: }
538:
539: PS_GROWBUF(p, 2);
540:
541: pos = (int)p->engine.ps.psmargcur++;
1.5 kristaps 542: p->engine.ps.psmarg[pos++] = c;
1.4 kristaps 543: p->engine.ps.psmarg[pos] = '\0';
1.2 kristaps 544: }
545:
546:
1.3 kristaps 547: /* ARGSUSED */
1.2 kristaps 548: static void
549: ps_end(struct termp *p)
550: {
551:
1.4 kristaps 552: /*
553: * At the end of the file, do one last showpage. This is the
554: * same behaviour as groff(1) and works for multiple pages as
555: * well as just one.
556: */
557:
1.8 kristaps 558: assert(0 == p->engine.ps.psstate);
559: assert('\0' == p->engine.ps.last);
1.4 kristaps 560: assert(p->engine.ps.psmarg && p->engine.ps.psmarg[0]);
561: printf("%s", p->engine.ps.psmarg);
1.16 kristaps 562: p->engine.ps.pages++;
1.4 kristaps 563: printf("showpage\n");
1.16 kristaps 564:
565: printf("%%%%Trailer\n");
566: printf("%%%%Pages: %zu\n", p->engine.ps.pages);
567: printf("%%%%EOF\n");
1.2 kristaps 568: }
569:
570:
571: static void
572: ps_begin(struct termp *p)
573: {
1.13 kristaps 574: time_t t;
1.16 kristaps 575: int i;
1.2 kristaps 576:
1.9 kristaps 577: /*
578: * Print margins into margin buffer. Nothing gets output to the
579: * screen yet, so we don't need to initialise the primary state.
1.2 kristaps 580: */
581:
1.4 kristaps 582: if (p->engine.ps.psmarg) {
583: assert(p->engine.ps.psmargsz);
584: p->engine.ps.psmarg[0] = '\0';
585: }
586:
587: p->engine.ps.psmargcur = 0;
1.9 kristaps 588: p->engine.ps.psstate = PS_MARGINS;
1.16 kristaps 589: p->engine.ps.pscol = p->engine.ps.left;
590: p->engine.ps.psrow = p->engine.ps.header;
1.4 kristaps 591:
1.9 kristaps 592: ps_setfont(p, TERMFONT_NONE);
1.4 kristaps 593:
594: (*p->headf)(p, p->argf);
595: (*p->endline)(p);
596:
1.16 kristaps 597: p->engine.ps.pscol = p->engine.ps.left;
598: p->engine.ps.psrow = p->engine.ps.footer;
1.4 kristaps 599:
600: (*p->footf)(p, p->argf);
601: (*p->endline)(p);
602:
603: p->engine.ps.psstate &= ~PS_MARGINS;
1.9 kristaps 604:
1.4 kristaps 605: assert(0 == p->engine.ps.psstate);
1.9 kristaps 606: assert(p->engine.ps.psmarg);
607: assert('\0' != p->engine.ps.psmarg[0]);
608:
609: /*
610: * Print header and initialise page state. Following this,
611: * stuff gets printed to the screen, so make sure we're sane.
612: */
1.4 kristaps 613:
1.13 kristaps 614: t = time(NULL);
615:
1.16 kristaps 616: printf("%%!PS-Adobe-3.0\n");
1.13 kristaps 617: printf("%%%%Creator: mandoc-%s\n", VERSION);
618: printf("%%%%CreationDate: %s", ctime(&t));
1.16 kristaps 619: printf("%%%%DocumentData: Clean7Bit\n");
620: printf("%%%%Orientation: Portrait\n");
621: printf("%%%%Pages: (atend)\n");
1.13 kristaps 622: printf("%%%%PageOrder: Ascend\n");
1.16 kristaps 623: printf("%%%%DocumentMedia: Default %zu %zu 0 () ()\n",
1.23 kristaps 624: AFM2PNT(p, p->engine.ps.width),
625: AFM2PNT(p, p->engine.ps.height));
1.16 kristaps 626: printf("%%%%DocumentNeededResources: font");
627: for (i = 0; i < (int)TERMFONT__MAX; i++)
628: printf(" %s", fonts[i].name);
629: printf("\n%%%%EndComments\n");
630:
631: printf("%%%%Page: %zu %zu\n",
632: p->engine.ps.pages + 1,
633: p->engine.ps.pages + 1);
1.13 kristaps 634:
1.9 kristaps 635: ps_setfont(p, TERMFONT_NONE);
1.16 kristaps 636: p->engine.ps.pscol = p->engine.ps.left;
637: p->engine.ps.psrow = p->engine.ps.top;
1.2 kristaps 638: }
639:
640:
641: static void
1.13 kristaps 642: ps_pletter(struct termp *p, int c)
1.2 kristaps 643: {
1.14 kristaps 644: int f;
1.2 kristaps 645:
1.9 kristaps 646: /*
647: * If we're not in a PostScript "word" context, then open one
648: * now at the current cursor.
649: */
650:
1.2 kristaps 651: if ( ! (PS_INLINE & p->engine.ps.psstate)) {
1.4 kristaps 652: ps_printf(p, "%zu %zu moveto\n(",
1.21 kristaps 653: AFM2PNT(p, p->engine.ps.pscol),
654: AFM2PNT(p, p->engine.ps.psrow));
1.2 kristaps 655: p->engine.ps.psstate |= PS_INLINE;
656: }
657:
658: /*
659: * We need to escape these characters as per the PostScript
660: * specification. We would also escape non-graphable characters
661: * (like tabs), but none of them would get to this point and
662: * it's superfluous to abort() on them.
663: */
664:
665: switch (c) {
666: case ('('):
667: /* FALLTHROUGH */
668: case (')'):
669: /* FALLTHROUGH */
670: case ('\\'):
1.4 kristaps 671: ps_putchar(p, '\\');
1.2 kristaps 672: break;
673: default:
674: break;
675: }
676:
677: /* Write the character and adjust where we are on the page. */
1.9 kristaps 678:
1.14 kristaps 679: f = (int)p->engine.ps.lastf;
1.13 kristaps 680:
1.14 kristaps 681: if (c <= 32 || (c - 32 > MAXCHAR)) {
1.13 kristaps 682: ps_putchar(p, ' ');
1.18 kristaps 683: p->engine.ps.pscol += fonts[f].gly[0].wx;
1.13 kristaps 684: return;
685: }
686:
1.25 ! kristaps 687: ps_putchar(p, (char)c);
1.14 kristaps 688: c -= 32;
1.18 kristaps 689: p->engine.ps.pscol += fonts[f].gly[c].wx;
1.2 kristaps 690: }
691:
692:
693: static void
1.9 kristaps 694: ps_pclose(struct termp *p)
695: {
696:
697: /*
698: * Spit out that we're exiting a word context (this is a
699: * "partial close" because we don't check the last-char buffer
700: * or anything).
701: */
702:
703: if ( ! (PS_INLINE & p->engine.ps.psstate))
704: return;
705:
706: ps_printf(p, ") show\n");
707: p->engine.ps.psstate &= ~PS_INLINE;
708: }
709:
710:
711: static void
712: ps_fclose(struct termp *p)
713: {
714:
715: /*
716: * Strong closure: if we have a last-char, spit it out after
717: * checking that we're in the right font mode. This will of
718: * course open a new scope, if applicable.
719: *
720: * Following this, close out any scope that's open.
721: */
722:
723: if ('\0' != p->engine.ps.last) {
724: if (p->engine.ps.lastf != TERMFONT_NONE) {
725: ps_pclose(p);
726: ps_setfont(p, TERMFONT_NONE);
727: }
728: ps_pletter(p, p->engine.ps.last);
729: p->engine.ps.last = '\0';
730: }
731:
732: if ( ! (PS_INLINE & p->engine.ps.psstate))
733: return;
734:
735: ps_pclose(p);
736: }
737:
738:
739: static void
1.8 kristaps 740: ps_letter(struct termp *p, char c)
741: {
742: char cc;
1.9 kristaps 743:
744: /*
745: * State machine dictates whether to buffer the last character
746: * or not. Basically, encoded words are detected by checking if
747: * we're an "8" and switching on the buffer. Then we put "8" in
748: * our buffer, and on the next charater, flush both character
749: * and buffer. Thus, "regular" words are detected by having a
750: * regular character and a regular buffer character.
751: */
752:
1.8 kristaps 753: if ('\0' == p->engine.ps.last) {
754: assert(8 != c);
755: p->engine.ps.last = c;
756: return;
757: } else if (8 == p->engine.ps.last) {
758: assert(8 != c);
1.9 kristaps 759: p->engine.ps.last = '\0';
1.8 kristaps 760: } else if (8 == c) {
761: assert(8 != p->engine.ps.last);
1.9 kristaps 762: if ('_' == p->engine.ps.last) {
763: if (p->engine.ps.lastf != TERMFONT_UNDER) {
764: ps_pclose(p);
765: ps_setfont(p, TERMFONT_UNDER);
766: }
767: } else if (p->engine.ps.lastf != TERMFONT_BOLD) {
768: ps_pclose(p);
769: ps_setfont(p, TERMFONT_BOLD);
770: }
1.8 kristaps 771: p->engine.ps.last = c;
772: return;
773: } else {
1.9 kristaps 774: if (p->engine.ps.lastf != TERMFONT_NONE) {
775: ps_pclose(p);
776: ps_setfont(p, TERMFONT_NONE);
777: }
1.8 kristaps 778: cc = p->engine.ps.last;
779: p->engine.ps.last = c;
780: c = cc;
781: }
782:
1.9 kristaps 783: ps_pletter(p, c);
1.8 kristaps 784: }
785:
786:
787: static void
1.2 kristaps 788: ps_advance(struct termp *p, size_t len)
789: {
790:
1.9 kristaps 791: /*
792: * Advance some spaces. This can probably be made smarter,
793: * i.e., to have multiple space-separated words in the same
794: * scope, but this is easier: just close out the current scope
795: * and readjust our column settings.
796: */
1.8 kristaps 797:
1.9 kristaps 798: ps_fclose(p);
1.14 kristaps 799: p->engine.ps.pscol += len;
1.2 kristaps 800: }
801:
802:
803: static void
804: ps_endline(struct termp *p)
805: {
1.8 kristaps 806:
1.9 kristaps 807: /* Close out any scopes we have open: we're at eoln. */
808:
809: ps_fclose(p);
1.2 kristaps 810:
1.9 kristaps 811: /*
812: * If we're in the margin, don't try to recalculate our current
813: * row. XXX: if the column tries to be fancy with multiple
814: * lines, we'll do nasty stuff.
815: */
1.2 kristaps 816:
817: if (PS_MARGINS & p->engine.ps.psstate)
818: return;
819:
1.9 kristaps 820: /*
821: * Put us down a line. If we're at the page bottom, spit out a
822: * showpage and restart our row.
823: */
824:
1.16 kristaps 825: p->engine.ps.pscol = p->engine.ps.left;
826: if (p->engine.ps.psrow >= p->engine.ps.lineheight +
827: p->engine.ps.bottom) {
828: p->engine.ps.psrow -= p->engine.ps.lineheight;
1.2 kristaps 829: return;
830: }
831:
1.4 kristaps 832: assert(p->engine.ps.psmarg && p->engine.ps.psmarg[0]);
833: printf("%s", p->engine.ps.psmarg);
1.23 kristaps 834: printf("showpage\n");
835: p->engine.ps.pages++;
1.16 kristaps 836: printf("%%%%Page: %zu %zu\n",
837: p->engine.ps.pages + 1,
838: p->engine.ps.pages + 1);
839: p->engine.ps.psrow = p->engine.ps.top;
1.1 kristaps 840: }
1.9 kristaps 841:
842:
843: static void
844: ps_setfont(struct termp *p, enum termfont f)
845: {
846:
1.16 kristaps 847: assert(f < TERMFONT__MAX);
1.21 kristaps 848: ps_printf(p, "/%s %zu selectfont\n",
849: fonts[(int)f].name, p->engine.ps.scale);
1.9 kristaps 850: p->engine.ps.lastf = f;
851: }
852:
1.11 kristaps 853:
1.12 kristaps 854: /* ARGSUSED */
1.11 kristaps 855: static size_t
856: ps_width(const struct termp *p, char c)
857: {
858:
1.14 kristaps 859: if (c <= 32 || c - 32 >= MAXCHAR)
1.18 kristaps 860: return(fonts[(int)TERMFONT_NONE].gly[0].wx);
1.14 kristaps 861:
862: c -= 32;
1.18 kristaps 863: return(fonts[(int)TERMFONT_NONE].gly[(int)c].wx);
1.11 kristaps 864: }
1.19 kristaps 865:
866:
1.20 kristaps 867: static double
1.19 kristaps 868: ps_hspan(const struct termp *p, const struct roffsu *su)
869: {
870: double r;
871:
872: /*
873: * All of these measurements are derived by converting from the
1.21 kristaps 874: * native measurement to AFM units.
1.19 kristaps 875: */
876:
877: switch (su->unit) {
878: case (SCALE_CM):
1.21 kristaps 879: r = PNT2AFM(p, su->scale * 28.34);
1.19 kristaps 880: break;
881: case (SCALE_IN):
1.21 kristaps 882: r = PNT2AFM(p, su->scale * 72);
1.19 kristaps 883: break;
884: case (SCALE_PC):
1.21 kristaps 885: r = PNT2AFM(p, su->scale * 12);
1.19 kristaps 886: break;
887: case (SCALE_PT):
1.21 kristaps 888: r = PNT2AFM(p, su->scale * 100);
1.19 kristaps 889: break;
890: case (SCALE_EM):
891: r = su->scale *
892: fonts[(int)TERMFONT_NONE].gly[109 - 32].wx;
893: break;
894: case (SCALE_MM):
1.21 kristaps 895: r = PNT2AFM(p, su->scale * 2.834);
1.19 kristaps 896: break;
897: case (SCALE_EN):
898: r = su->scale *
899: fonts[(int)TERMFONT_NONE].gly[110 - 32].wx;
900: break;
901: case (SCALE_VS):
902: r = su->scale * p->engine.ps.lineheight;
903: break;
904: default:
905: r = su->scale;
906: break;
907: }
908:
1.20 kristaps 909: return(r);
1.19 kristaps 910: }
911:
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