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Clean up some tight spots in mandoc's default mode: pessimistically
[mandoc.git] / term_ps.c
1 /* $Id: term_ps.c,v 1.39 2010/07/25 22:15:07 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 #define PS_GROWBUF(p, sz) \
357 do if ((p)->engine.ps.psmargcur + (sz) > \
358 (p)->engine.ps.psmargsz) { \
359 (p)->engine.ps.psmargsz += /* CONSTCOND */ \
360 MAX(PS_BUFSLOP, (sz)); \
361 (p)->engine.ps.psmarg = realloc \
362 ((p)->engine.ps.psmarg, \
363 (p)->engine.ps.psmargsz); \
364 if (NULL == (p)->engine.ps.psmarg) { \
365 perror(NULL); \
366 exit(EXIT_FAILURE); \
367 } \
368 } while (/* CONSTCOND */ 0)
369
370
371 static double ps_hspan(const struct termp *,
372 const struct roffsu *);
373 static size_t ps_width(const struct termp *, char);
374 static void ps_advance(struct termp *, size_t);
375 static void ps_begin(struct termp *);
376 static void ps_closepage(struct termp *);
377 static void ps_end(struct termp *);
378 static void ps_endline(struct termp *);
379 static void ps_fclose(struct termp *);
380 static void ps_letter(struct termp *, char);
381 static void ps_pclose(struct termp *);
382 static void ps_pletter(struct termp *, int);
383 static void ps_printf(struct termp *, const char *, ...);
384 static void ps_putchar(struct termp *, char);
385 static void ps_setfont(struct termp *, enum termfont);
386 static struct termp *pspdf_alloc(char *);
387 static void pdf_obj(struct termp *, size_t);
388
389
390 void *
391 pdf_alloc(char *outopts)
392 {
393 struct termp *p;
394
395 if (NULL != (p = pspdf_alloc(outopts)))
396 p->type = TERMTYPE_PDF;
397
398 return(p);
399 }
400
401
402 void *
403 ps_alloc(char *outopts)
404 {
405 struct termp *p;
406
407 if (NULL != (p = pspdf_alloc(outopts)))
408 p->type = TERMTYPE_PS;
409
410 return(p);
411 }
412
413
414 static struct termp *
415 pspdf_alloc(char *outopts)
416 {
417 struct termp *p;
418 size_t pagex, pagey, marginx, marginy, lineheight;
419 const char *toks[2];
420 const char *pp;
421 char *v;
422
423 if (NULL == (p = term_alloc(TERMENC_ASCII)))
424 return(NULL);
425
426 p->advance = ps_advance;
427 p->begin = ps_begin;
428 p->end = ps_end;
429 p->endline = ps_endline;
430 p->hspan = ps_hspan;
431 p->letter = ps_letter;
432 p->width = ps_width;
433
434 toks[0] = "paper";
435 toks[1] = NULL;
436
437 pp = NULL;
438
439 while (outopts && *outopts)
440 switch (getsubopt(&outopts, UNCONST(toks), &v)) {
441 case (0):
442 pp = v;
443 break;
444 default:
445 break;
446 }
447
448 /* Default to US letter (millimetres). */
449
450 pagex = 216;
451 pagey = 279;
452
453 /*
454 * The ISO-269 paper sizes can be calculated automatically, but
455 * it would require bringing in -lm for pow() and I'd rather not
456 * do that. So just do it the easy way for now. Since this
457 * only happens once, I'm not terribly concerned.
458 */
459
460 if (pp && strcasecmp(pp, "letter")) {
461 if (0 == strcasecmp(pp, "a3")) {
462 pagex = 297;
463 pagey = 420;
464 } else if (0 == strcasecmp(pp, "a4")) {
465 pagex = 210;
466 pagey = 297;
467 } else if (0 == strcasecmp(pp, "a5")) {
468 pagex = 148;
469 pagey = 210;
470 } else if (0 == strcasecmp(pp, "legal")) {
471 pagex = 216;
472 pagey = 356;
473 } else if (2 != sscanf(pp, "%zux%zu", &pagex, &pagey))
474 fprintf(stderr, "%s: Unknown paper\n", pp);
475 } else if (NULL == pp)
476 pp = "letter";
477
478 /*
479 * This MUST be defined before any PNT2AFM or AFM2PNT
480 * calculations occur.
481 */
482
483 p->engine.ps.scale = 11;
484
485 /* Remember millimetres -> AFM units. */
486
487 pagex = PNT2AFM(p, ((double)pagex * 2.834));
488 pagey = PNT2AFM(p, ((double)pagey * 2.834));
489
490 /* Margins are 1/9 the page x and y. */
491
492 marginx = /* LINTED */
493 (size_t)((double)pagex / 9.0);
494 marginy = /* LINTED */
495 (size_t)((double)pagey / 9.0);
496
497 /* Line-height is 1.4em. */
498
499 lineheight = PNT2AFM(p, ((double)p->engine.ps.scale * 1.4));
500
501 p->engine.ps.width = pagex;
502 p->engine.ps.height = pagey;
503 p->engine.ps.header = pagey - (marginy / 2) - (lineheight / 2);
504 p->engine.ps.top = pagey - marginy;
505 p->engine.ps.footer = (marginy / 2) - (lineheight / 2);
506 p->engine.ps.bottom = marginy;
507 p->engine.ps.left = marginx;
508 p->engine.ps.lineheight = lineheight;
509
510 p->defrmargin = pagex - (marginx * 2);
511 return(p);
512 }
513
514
515 void
516 pspdf_free(void *arg)
517 {
518 struct termp *p;
519
520 p = (struct termp *)arg;
521
522 if (p->engine.ps.psmarg)
523 free(p->engine.ps.psmarg);
524 if (p->engine.ps.pdfobjs)
525 free(p->engine.ps.pdfobjs);
526
527 term_free(p);
528 }
529
530
531 static void
532 ps_printf(struct termp *p, const char *fmt, ...)
533 {
534 va_list ap;
535 int pos, len;
536
537 va_start(ap, fmt);
538
539 /*
540 * If we're running in regular mode, then pipe directly into
541 * vprintf(). If we're processing margins, then push the data
542 * into our growable margin buffer.
543 */
544
545 if ( ! (PS_MARGINS & p->engine.ps.flags)) {
546 len = vprintf(fmt, ap);
547 va_end(ap);
548 p->engine.ps.pdfbytes += /* LINTED */
549 len < 0 ? 0 : (size_t)len;
550 return;
551 }
552
553 /*
554 * XXX: I assume that the in-margin print won't exceed
555 * PS_BUFSLOP (128 bytes), which is reasonable but still an
556 * assumption that will cause pukeage if it's not the case.
557 */
558
559 PS_GROWBUF(p, PS_BUFSLOP);
560
561 pos = (int)p->engine.ps.psmargcur;
562 len = vsnprintf(&p->engine.ps.psmarg[pos], PS_BUFSLOP, fmt, ap);
563
564 va_end(ap);
565
566 p->engine.ps.psmargcur = strlen(p->engine.ps.psmarg);
567 }
568
569
570 static void
571 ps_putchar(struct termp *p, char c)
572 {
573 int pos;
574
575 /* See ps_printf(). */
576
577 if ( ! (PS_MARGINS & p->engine.ps.flags)) {
578 putchar(c);
579 p->engine.ps.pdfbytes++;
580 return;
581 }
582
583 PS_GROWBUF(p, 2);
584
585 pos = (int)p->engine.ps.psmargcur++;
586 p->engine.ps.psmarg[pos++] = c;
587 p->engine.ps.psmarg[pos] = '\0';
588 }
589
590
591 static void
592 pdf_obj(struct termp *p, size_t obj)
593 {
594
595 assert(obj > 0);
596
597 if ((obj - 1) >= p->engine.ps.pdfobjsz) {
598 p->engine.ps.pdfobjsz = obj + 128;
599 p->engine.ps.pdfobjs = realloc
600 (p->engine.ps.pdfobjs,
601 p->engine.ps.pdfobjsz * sizeof(size_t));
602 if (NULL == p->engine.ps.pdfobjs) {
603 perror(NULL);
604 exit(EXIT_FAILURE);
605 }
606 }
607
608 p->engine.ps.pdfobjs[(int)obj - 1] = p->engine.ps.pdfbytes;
609 ps_printf(p, "%zu 0 obj\n", obj);
610 }
611
612
613 static void
614 ps_closepage(struct termp *p)
615 {
616 int i;
617 size_t len, base;
618
619 /*
620 * Close out a page that we've already flushed to output. In
621 * PostScript, we simply note that the page must be showed. In
622 * PDF, we must now create the Length, Resource, and Page node
623 * for the page contents.
624 */
625
626 assert(p->engine.ps.psmarg && p->engine.ps.psmarg[0]);
627 ps_printf(p, "%s", p->engine.ps.psmarg);
628
629 if (TERMTYPE_PS != p->type) {
630 ps_printf(p, "ET\n");
631
632 len = p->engine.ps.pdfbytes - p->engine.ps.pdflastpg;
633 base = p->engine.ps.pages * 4 + p->engine.ps.pdfbody;
634
635 ps_printf(p, "endstream\nendobj\n");
636
637 /* Length of content. */
638 pdf_obj(p, base + 1);
639 ps_printf(p, "%zu\nendobj\n", len);
640
641 /* Resource for content. */
642 pdf_obj(p, base + 2);
643 ps_printf(p, "<<\n/ProcSet [/PDF /Text]\n");
644 ps_printf(p, "/Font <<\n");
645 for (i = 0; i < (int)TERMFONT__MAX; i++)
646 ps_printf(p, "/F%d %d 0 R\n", i, 3 + i);
647 ps_printf(p, ">>\n>>\n");
648
649 /* Page node. */
650 pdf_obj(p, base + 3);
651 ps_printf(p, "<<\n");
652 ps_printf(p, "/Type /Page\n");
653 ps_printf(p, "/Parent 2 0 R\n");
654 ps_printf(p, "/Resources %zu 0 R\n", base + 2);
655 ps_printf(p, "/Contents %zu 0 R\n", base);
656 ps_printf(p, ">>\nendobj\n");
657 } else
658 ps_printf(p, "showpage\n");
659
660 p->engine.ps.pages++;
661 p->engine.ps.psrow = p->engine.ps.top;
662 assert( ! (PS_NEWPAGE & p->engine.ps.flags));
663 p->engine.ps.flags |= PS_NEWPAGE;
664 }
665
666
667 /* ARGSUSED */
668 static void
669 ps_end(struct termp *p)
670 {
671 size_t i, xref, base;
672
673 /*
674 * At the end of the file, do one last showpage. This is the
675 * same behaviour as groff(1) and works for multiple pages as
676 * well as just one.
677 */
678
679 if ( ! (PS_NEWPAGE & p->engine.ps.flags)) {
680 assert(0 == p->engine.ps.flags);
681 assert('\0' == p->engine.ps.last);
682 ps_closepage(p);
683 }
684
685 if (TERMTYPE_PS == p->type) {
686 ps_printf(p, "%%%%Trailer\n");
687 ps_printf(p, "%%%%Pages: %zu\n", p->engine.ps.pages);
688 ps_printf(p, "%%%%EOF\n");
689 return;
690 }
691
692 pdf_obj(p, 2);
693 ps_printf(p, "<<\n/Type /Pages\n");
694 ps_printf(p, "/MediaBox [0 0 %zu %zu]\n",
695 (size_t)AFM2PNT(p, p->engine.ps.width),
696 (size_t)AFM2PNT(p, p->engine.ps.height));
697
698 ps_printf(p, "/Count %zu\n", p->engine.ps.pages);
699 ps_printf(p, "/Kids [");
700
701 for (i = 0; i < p->engine.ps.pages; i++)
702 ps_printf(p, " %zu 0 R", i * 4 +
703 p->engine.ps.pdfbody + 3);
704
705 base = (p->engine.ps.pages - 1) * 4 +
706 p->engine.ps.pdfbody + 4;
707
708 ps_printf(p, "]\n>>\nendobj\n");
709 pdf_obj(p, base);
710 ps_printf(p, "<<\n");
711 ps_printf(p, "/Type /Catalog\n");
712 ps_printf(p, "/Pages 2 0 R\n");
713 ps_printf(p, ">>\n");
714 xref = p->engine.ps.pdfbytes;
715 ps_printf(p, "xref\n");
716 ps_printf(p, "0 %zu\n", base + 1);
717 ps_printf(p, "0000000000 65535 f \n");
718
719 for (i = 0; i < base; i++)
720 ps_printf(p, "%.10zu 00000 n \n",
721 p->engine.ps.pdfobjs[(int)i]);
722
723 ps_printf(p, "trailer\n");
724 ps_printf(p, "<<\n");
725 ps_printf(p, "/Size %zu\n", base + 1);
726 ps_printf(p, "/Root %zu 0 R\n", base);
727 ps_printf(p, "/Info 1 0 R\n");
728 ps_printf(p, ">>\n");
729 ps_printf(p, "startxref\n");
730 ps_printf(p, "%zu\n", xref);
731 ps_printf(p, "%%%%EOF\n");
732 }
733
734
735 static void
736 ps_begin(struct termp *p)
737 {
738 time_t t;
739 int i;
740
741 /*
742 * Print margins into margin buffer. Nothing gets output to the
743 * screen yet, so we don't need to initialise the primary state.
744 */
745
746 if (p->engine.ps.psmarg) {
747 assert(p->engine.ps.psmargsz);
748 p->engine.ps.psmarg[0] = '\0';
749 }
750
751 /*p->engine.ps.pdfbytes = 0;*/
752 p->engine.ps.psmargcur = 0;
753 p->engine.ps.flags = PS_MARGINS;
754 p->engine.ps.pscol = p->engine.ps.left;
755 p->engine.ps.psrow = p->engine.ps.header;
756
757 ps_setfont(p, TERMFONT_NONE);
758
759 (*p->headf)(p, p->argf);
760 (*p->endline)(p);
761
762 p->engine.ps.pscol = p->engine.ps.left;
763 p->engine.ps.psrow = p->engine.ps.footer;
764
765 (*p->footf)(p, p->argf);
766 (*p->endline)(p);
767
768 p->engine.ps.flags &= ~PS_MARGINS;
769
770 assert(0 == p->engine.ps.flags);
771 assert(p->engine.ps.psmarg);
772 assert('\0' != p->engine.ps.psmarg[0]);
773
774 /*
775 * Print header and initialise page state. Following this,
776 * stuff gets printed to the screen, so make sure we're sane.
777 */
778
779 t = time(NULL);
780
781 if (TERMTYPE_PS == p->type) {
782 ps_printf(p, "%%!PS-Adobe-3.0\n");
783 ps_printf(p, "%%%%Creator: mandoc-%s\n", VERSION);
784 ps_printf(p, "%%%%CreationDate: %s", ctime(&t));
785 ps_printf(p, "%%%%DocumentData: Clean7Bit\n");
786 ps_printf(p, "%%%%Orientation: Portrait\n");
787 ps_printf(p, "%%%%Pages: (atend)\n");
788 ps_printf(p, "%%%%PageOrder: Ascend\n");
789 ps_printf(p, "%%%%DocumentMedia: "
790 "Default %zu %zu 0 () ()\n",
791 (size_t)AFM2PNT(p, p->engine.ps.width),
792 (size_t)AFM2PNT(p, p->engine.ps.height));
793 ps_printf(p, "%%%%DocumentNeededResources: font");
794
795 for (i = 0; i < (int)TERMFONT__MAX; i++)
796 ps_printf(p, " %s", fonts[i].name);
797
798 ps_printf(p, "\n%%%%EndComments\n");
799 } else {
800 ps_printf(p, "%%PDF-1.1\n");
801 pdf_obj(p, 1);
802 ps_printf(p, "<<\n");
803 ps_printf(p, "/Creator mandoc-%s\n", VERSION);
804 ps_printf(p, ">>\n");
805 ps_printf(p, "endobj\n");
806
807 for (i = 0; i < (int)TERMFONT__MAX; i++) {
808 pdf_obj(p, (size_t)i + 3);
809 ps_printf(p, "<<\n");
810 ps_printf(p, "/Type /Font\n");
811 ps_printf(p, "/Subtype /Type1\n");
812 ps_printf(p, "/Name /F%zu\n", i);
813 ps_printf(p, "/BaseFont /%s\n", fonts[i].name);
814 ps_printf(p, ">>\n");
815 }
816 }
817
818 p->engine.ps.pdfbody = (size_t)TERMFONT__MAX + 3;
819 p->engine.ps.pscol = p->engine.ps.left;
820 p->engine.ps.psrow = p->engine.ps.top;
821 p->engine.ps.flags |= PS_NEWPAGE;
822 ps_setfont(p, TERMFONT_NONE);
823 }
824
825
826 static void
827 ps_pletter(struct termp *p, int c)
828 {
829 int f;
830
831 /*
832 * If we haven't opened a page context, then output that we're
833 * in a new page and make sure the font is correctly set.
834 */
835
836 if (PS_NEWPAGE & p->engine.ps.flags) {
837 if (TERMTYPE_PS == p->type) {
838 ps_printf(p, "%%%%Page: %zu %zu\n",
839 p->engine.ps.pages + 1,
840 p->engine.ps.pages + 1);
841 ps_printf(p, "/%s %zu selectfont\n",
842 fonts[(int)p->engine.ps.lastf].name,
843 p->engine.ps.scale);
844 } else {
845 pdf_obj(p, p->engine.ps.pdfbody +
846 p->engine.ps.pages * 4);
847 ps_printf(p, "<<\n");
848 ps_printf(p, "/Length %zu 0 R\n",
849 p->engine.ps.pdfbody + 1 +
850 p->engine.ps.pages * 4);
851 ps_printf(p, ">>\nstream\n");
852 }
853 p->engine.ps.pdflastpg = p->engine.ps.pdfbytes;
854 p->engine.ps.flags &= ~PS_NEWPAGE;
855 }
856
857 /*
858 * If we're not in a PostScript "word" context, then open one
859 * now at the current cursor.
860 */
861
862 if ( ! (PS_INLINE & p->engine.ps.flags)) {
863 if (TERMTYPE_PS != p->type) {
864 ps_printf(p, "BT\n/F%d %zu Tf\n",
865 (int)p->engine.ps.lastf,
866 p->engine.ps.scale);
867 ps_printf(p, "%.3f %.3f Td\n(",
868 AFM2PNT(p, p->engine.ps.pscol),
869 AFM2PNT(p, p->engine.ps.psrow));
870 } else
871 ps_printf(p, "%.3f %.3f moveto\n(",
872 AFM2PNT(p, p->engine.ps.pscol),
873 AFM2PNT(p, p->engine.ps.psrow));
874 p->engine.ps.flags |= PS_INLINE;
875 }
876
877 assert( ! (PS_NEWPAGE & p->engine.ps.flags));
878
879 /*
880 * We need to escape these characters as per the PostScript
881 * specification. We would also escape non-graphable characters
882 * (like tabs), but none of them would get to this point and
883 * it's superfluous to abort() on them.
884 */
885
886 switch (c) {
887 case ('('):
888 /* FALLTHROUGH */
889 case (')'):
890 /* FALLTHROUGH */
891 case ('\\'):
892 ps_putchar(p, '\\');
893 break;
894 default:
895 break;
896 }
897
898 /* Write the character and adjust where we are on the page. */
899
900 f = (int)p->engine.ps.lastf;
901
902 if (c <= 32 || (c - 32 > MAXCHAR)) {
903 ps_putchar(p, ' ');
904 p->engine.ps.pscol += (size_t)fonts[f].gly[0].wx;
905 return;
906 }
907
908 ps_putchar(p, (char)c);
909 c -= 32;
910 p->engine.ps.pscol += (size_t)fonts[f].gly[c].wx;
911 }
912
913
914 static void
915 ps_pclose(struct termp *p)
916 {
917
918 /*
919 * Spit out that we're exiting a word context (this is a
920 * "partial close" because we don't check the last-char buffer
921 * or anything).
922 */
923
924 if ( ! (PS_INLINE & p->engine.ps.flags))
925 return;
926
927 if (TERMTYPE_PS != p->type) {
928 ps_printf(p, ") Tj\nET\n");
929 } else
930 ps_printf(p, ") show\n");
931
932 p->engine.ps.flags &= ~PS_INLINE;
933 }
934
935
936 static void
937 ps_fclose(struct termp *p)
938 {
939
940 /*
941 * Strong closure: if we have a last-char, spit it out after
942 * checking that we're in the right font mode. This will of
943 * course open a new scope, if applicable.
944 *
945 * Following this, close out any scope that's open.
946 */
947
948 if ('\0' != p->engine.ps.last) {
949 if (p->engine.ps.lastf != TERMFONT_NONE) {
950 ps_pclose(p);
951 ps_setfont(p, TERMFONT_NONE);
952 }
953 ps_pletter(p, p->engine.ps.last);
954 p->engine.ps.last = '\0';
955 }
956
957 if ( ! (PS_INLINE & p->engine.ps.flags))
958 return;
959
960 ps_pclose(p);
961 }
962
963
964 static void
965 ps_letter(struct termp *p, char c)
966 {
967 char cc;
968
969 /*
970 * State machine dictates whether to buffer the last character
971 * or not. Basically, encoded words are detected by checking if
972 * we're an "8" and switching on the buffer. Then we put "8" in
973 * our buffer, and on the next charater, flush both character
974 * and buffer. Thus, "regular" words are detected by having a
975 * regular character and a regular buffer character.
976 */
977
978 if ('\0' == p->engine.ps.last) {
979 assert(8 != c);
980 p->engine.ps.last = c;
981 return;
982 } else if (8 == p->engine.ps.last) {
983 assert(8 != c);
984 p->engine.ps.last = '\0';
985 } else if (8 == c) {
986 assert(8 != p->engine.ps.last);
987 if ('_' == p->engine.ps.last) {
988 if (p->engine.ps.lastf != TERMFONT_UNDER) {
989 ps_pclose(p);
990 ps_setfont(p, TERMFONT_UNDER);
991 }
992 } else if (p->engine.ps.lastf != TERMFONT_BOLD) {
993 ps_pclose(p);
994 ps_setfont(p, TERMFONT_BOLD);
995 }
996 p->engine.ps.last = c;
997 return;
998 } else {
999 if (p->engine.ps.lastf != TERMFONT_NONE) {
1000 ps_pclose(p);
1001 ps_setfont(p, TERMFONT_NONE);
1002 }
1003 cc = p->engine.ps.last;
1004 p->engine.ps.last = c;
1005 c = cc;
1006 }
1007
1008 ps_pletter(p, c);
1009 }
1010
1011
1012 static void
1013 ps_advance(struct termp *p, size_t len)
1014 {
1015
1016 /*
1017 * Advance some spaces. This can probably be made smarter,
1018 * i.e., to have multiple space-separated words in the same
1019 * scope, but this is easier: just close out the current scope
1020 * and readjust our column settings.
1021 */
1022
1023 ps_fclose(p);
1024 p->engine.ps.pscol += len;
1025 }
1026
1027
1028 static void
1029 ps_endline(struct termp *p)
1030 {
1031
1032 /* Close out any scopes we have open: we're at eoln. */
1033
1034 ps_fclose(p);
1035
1036 /*
1037 * If we're in the margin, don't try to recalculate our current
1038 * row. XXX: if the column tries to be fancy with multiple
1039 * lines, we'll do nasty stuff.
1040 */
1041
1042 if (PS_MARGINS & p->engine.ps.flags)
1043 return;
1044
1045 /* Left-justify. */
1046
1047 p->engine.ps.pscol = p->engine.ps.left;
1048
1049 /* If we haven't printed anything, return. */
1050
1051 if (PS_NEWPAGE & p->engine.ps.flags)
1052 return;
1053
1054 /*
1055 * Put us down a line. If we're at the page bottom, spit out a
1056 * showpage and restart our row.
1057 */
1058
1059 if (p->engine.ps.psrow >= p->engine.ps.lineheight +
1060 p->engine.ps.bottom) {
1061 p->engine.ps.psrow -= p->engine.ps.lineheight;
1062 return;
1063 }
1064
1065 ps_closepage(p);
1066 }
1067
1068
1069 static void
1070 ps_setfont(struct termp *p, enum termfont f)
1071 {
1072
1073 assert(f < TERMFONT__MAX);
1074 p->engine.ps.lastf = f;
1075
1076 /*
1077 * If we're still at the top of the page, let the font-setting
1078 * be delayed until we actually have stuff to print.
1079 */
1080
1081 if (PS_NEWPAGE & p->engine.ps.flags)
1082 return;
1083
1084 if (TERMTYPE_PS == p->type)
1085 ps_printf(p, "/%s %zu selectfont\n",
1086 fonts[(int)f].name,
1087 p->engine.ps.scale);
1088 else
1089 ps_printf(p, "/F%d %zu Tf\n",
1090 (int)f,
1091 p->engine.ps.scale);
1092 }
1093
1094
1095 /* ARGSUSED */
1096 static size_t
1097 ps_width(const struct termp *p, char c)
1098 {
1099
1100 if (c <= 32 || c - 32 >= MAXCHAR)
1101 return((size_t)fonts[(int)TERMFONT_NONE].gly[0].wx);
1102
1103 c -= 32;
1104 return((size_t)fonts[(int)TERMFONT_NONE].gly[(int)c].wx);
1105 }
1106
1107
1108 static double
1109 ps_hspan(const struct termp *p, const struct roffsu *su)
1110 {
1111 double r;
1112
1113 /*
1114 * All of these measurements are derived by converting from the
1115 * native measurement to AFM units.
1116 */
1117
1118 switch (su->unit) {
1119 case (SCALE_CM):
1120 r = PNT2AFM(p, su->scale * 28.34);
1121 break;
1122 case (SCALE_IN):
1123 r = PNT2AFM(p, su->scale * 72);
1124 break;
1125 case (SCALE_PC):
1126 r = PNT2AFM(p, su->scale * 12);
1127 break;
1128 case (SCALE_PT):
1129 r = PNT2AFM(p, su->scale * 100);
1130 break;
1131 case (SCALE_EM):
1132 r = su->scale *
1133 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx;
1134 break;
1135 case (SCALE_MM):
1136 r = PNT2AFM(p, su->scale * 2.834);
1137 break;
1138 case (SCALE_EN):
1139 r = su->scale *
1140 fonts[(int)TERMFONT_NONE].gly[110 - 32].wx;
1141 break;
1142 case (SCALE_VS):
1143 r = su->scale * p->engine.ps.lineheight;
1144 break;
1145 default:
1146 r = su->scale;
1147 break;
1148 }
1149
1150 return(r);
1151 }
1152
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