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[mandoc.git] / term_ps.c
1 /* $Id: term_ps.c,v 1.66 2014/08/28 01:37:12 schwarze Exp $ */
2 /*
3 * Copyright (c) 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
4 * Copyright (c) 2014 Ingo Schwarze <schwarze@openbsd.org>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18 #include "config.h"
19
20 #include <sys/types.h>
21
22 #include <assert.h>
23 #include <stdarg.h>
24 #include <stdint.h>
25 #include <stdio.h>
26 #include <stdlib.h>
27 #include <string.h>
28 #include <unistd.h>
29
30 #include "mandoc.h"
31 #include "mandoc_aux.h"
32 #include "out.h"
33 #include "main.h"
34 #include "term.h"
35
36 /* These work the buffer used by the header and footer. */
37 #define PS_BUFSLOP 128
38
39 /* Convert PostScript point "x" to an AFM unit. */
40 #define PNT2AFM(p, x) \
41 (size_t)((double)(x) * (1000.0 / (double)(p)->ps->scale))
42
43 /* Convert an AFM unit "x" to a PostScript points */
44 #define AFM2PNT(p, x) \
45 ((double)(x) / (1000.0 / (double)(p)->ps->scale))
46
47 struct glyph {
48 unsigned short wx; /* WX in AFM */
49 };
50
51 struct font {
52 const char *name; /* FontName in AFM */
53 #define MAXCHAR 95 /* total characters we can handle */
54 struct glyph gly[MAXCHAR]; /* glyph metrics */
55 };
56
57 struct termp_ps {
58 int flags;
59 #define PS_INLINE (1 << 0) /* we're in a word */
60 #define PS_MARGINS (1 << 1) /* we're in the margins */
61 #define PS_NEWPAGE (1 << 2) /* new page, no words yet */
62 size_t pscol; /* visible column (AFM units) */
63 size_t psrow; /* visible row (AFM units) */
64 char *psmarg; /* margin buf */
65 size_t psmargsz; /* margin buf size */
66 size_t psmargcur; /* cur index in margin buf */
67 char last; /* character buffer */
68 enum termfont lastf; /* last set font */
69 enum termfont nextf; /* building next font here */
70 size_t scale; /* font scaling factor */
71 size_t pages; /* number of pages shown */
72 size_t lineheight; /* line height (AFM units) */
73 size_t top; /* body top (AFM units) */
74 size_t bottom; /* body bottom (AFM units) */
75 size_t height; /* page height (AFM units */
76 size_t width; /* page width (AFM units) */
77 size_t lastwidth; /* page width before last ll */
78 size_t left; /* body left (AFM units) */
79 size_t header; /* header pos (AFM units) */
80 size_t footer; /* footer pos (AFM units) */
81 size_t pdfbytes; /* current output byte */
82 size_t pdflastpg; /* byte of last page mark */
83 size_t pdfbody; /* start of body object */
84 size_t *pdfobjs; /* table of object offsets */
85 size_t pdfobjsz; /* size of pdfobjs */
86 };
87
88 static double ps_hspan(const struct termp *,
89 const struct roffsu *);
90 static size_t ps_width(const struct termp *, int);
91 static void ps_advance(struct termp *, size_t);
92 static void ps_begin(struct termp *);
93 static void ps_closepage(struct termp *);
94 static void ps_end(struct termp *);
95 static void ps_endline(struct termp *);
96 static void ps_fclose(struct termp *);
97 static void ps_growbuf(struct termp *, size_t);
98 static void ps_letter(struct termp *, int);
99 static void ps_pclose(struct termp *);
100 static void ps_pletter(struct termp *, int);
101 #if __GNUC__ - 0 >= 4
102 __attribute__((__format__ (__printf__, 2, 3)))
103 #endif
104 static void ps_printf(struct termp *, const char *, ...);
105 static void ps_putchar(struct termp *, char);
106 static void ps_setfont(struct termp *, enum termfont);
107 static void ps_setwidth(struct termp *, int, size_t);
108 static struct termp *pspdf_alloc(char *);
109 static void pdf_obj(struct termp *, size_t);
110
111 /*
112 * We define, for the time being, three fonts: bold, oblique/italic, and
113 * normal (roman). The following table hard-codes the font metrics for
114 * ASCII, i.e., 32--127.
115 */
116
117 static const struct font fonts[TERMFONT__MAX] = {
118 { "Times-Roman", {
119 { 250 },
120 { 333 },
121 { 408 },
122 { 500 },
123 { 500 },
124 { 833 },
125 { 778 },
126 { 333 },
127 { 333 },
128 { 333 },
129 { 500 },
130 { 564 },
131 { 250 },
132 { 333 },
133 { 250 },
134 { 278 },
135 { 500 },
136 { 500 },
137 { 500 },
138 { 500 },
139 { 500 },
140 { 500 },
141 { 500 },
142 { 500 },
143 { 500 },
144 { 500 },
145 { 278 },
146 { 278 },
147 { 564 },
148 { 564 },
149 { 564 },
150 { 444 },
151 { 921 },
152 { 722 },
153 { 667 },
154 { 667 },
155 { 722 },
156 { 611 },
157 { 556 },
158 { 722 },
159 { 722 },
160 { 333 },
161 { 389 },
162 { 722 },
163 { 611 },
164 { 889 },
165 { 722 },
166 { 722 },
167 { 556 },
168 { 722 },
169 { 667 },
170 { 556 },
171 { 611 },
172 { 722 },
173 { 722 },
174 { 944 },
175 { 722 },
176 { 722 },
177 { 611 },
178 { 333 },
179 { 278 },
180 { 333 },
181 { 469 },
182 { 500 },
183 { 333 },
184 { 444 },
185 { 500 },
186 { 444 },
187 { 500},
188 { 444},
189 { 333},
190 { 500},
191 { 500},
192 { 278},
193 { 278},
194 { 500},
195 { 278},
196 { 778},
197 { 500},
198 { 500},
199 { 500},
200 { 500},
201 { 333},
202 { 389},
203 { 278},
204 { 500},
205 { 500},
206 { 722},
207 { 500},
208 { 500},
209 { 444},
210 { 480},
211 { 200},
212 { 480},
213 { 541},
214 } },
215 { "Times-Bold", {
216 { 250 },
217 { 333 },
218 { 555 },
219 { 500 },
220 { 500 },
221 { 1000 },
222 { 833 },
223 { 333 },
224 { 333 },
225 { 333 },
226 { 500 },
227 { 570 },
228 { 250 },
229 { 333 },
230 { 250 },
231 { 278 },
232 { 500 },
233 { 500 },
234 { 500 },
235 { 500 },
236 { 500 },
237 { 500 },
238 { 500 },
239 { 500 },
240 { 500 },
241 { 500 },
242 { 333 },
243 { 333 },
244 { 570 },
245 { 570 },
246 { 570 },
247 { 500 },
248 { 930 },
249 { 722 },
250 { 667 },
251 { 722 },
252 { 722 },
253 { 667 },
254 { 611 },
255 { 778 },
256 { 778 },
257 { 389 },
258 { 500 },
259 { 778 },
260 { 667 },
261 { 944 },
262 { 722 },
263 { 778 },
264 { 611 },
265 { 778 },
266 { 722 },
267 { 556 },
268 { 667 },
269 { 722 },
270 { 722 },
271 { 1000 },
272 { 722 },
273 { 722 },
274 { 667 },
275 { 333 },
276 { 278 },
277 { 333 },
278 { 581 },
279 { 500 },
280 { 333 },
281 { 500 },
282 { 556 },
283 { 444 },
284 { 556 },
285 { 444 },
286 { 333 },
287 { 500 },
288 { 556 },
289 { 278 },
290 { 333 },
291 { 556 },
292 { 278 },
293 { 833 },
294 { 556 },
295 { 500 },
296 { 556 },
297 { 556 },
298 { 444 },
299 { 389 },
300 { 333 },
301 { 556 },
302 { 500 },
303 { 722 },
304 { 500 },
305 { 500 },
306 { 444 },
307 { 394 },
308 { 220 },
309 { 394 },
310 { 520 },
311 } },
312 { "Times-Italic", {
313 { 250 },
314 { 333 },
315 { 420 },
316 { 500 },
317 { 500 },
318 { 833 },
319 { 778 },
320 { 333 },
321 { 333 },
322 { 333 },
323 { 500 },
324 { 675 },
325 { 250 },
326 { 333 },
327 { 250 },
328 { 278 },
329 { 500 },
330 { 500 },
331 { 500 },
332 { 500 },
333 { 500 },
334 { 500 },
335 { 500 },
336 { 500 },
337 { 500 },
338 { 500 },
339 { 333 },
340 { 333 },
341 { 675 },
342 { 675 },
343 { 675 },
344 { 500 },
345 { 920 },
346 { 611 },
347 { 611 },
348 { 667 },
349 { 722 },
350 { 611 },
351 { 611 },
352 { 722 },
353 { 722 },
354 { 333 },
355 { 444 },
356 { 667 },
357 { 556 },
358 { 833 },
359 { 667 },
360 { 722 },
361 { 611 },
362 { 722 },
363 { 611 },
364 { 500 },
365 { 556 },
366 { 722 },
367 { 611 },
368 { 833 },
369 { 611 },
370 { 556 },
371 { 556 },
372 { 389 },
373 { 278 },
374 { 389 },
375 { 422 },
376 { 500 },
377 { 333 },
378 { 500 },
379 { 500 },
380 { 444 },
381 { 500 },
382 { 444 },
383 { 278 },
384 { 500 },
385 { 500 },
386 { 278 },
387 { 278 },
388 { 444 },
389 { 278 },
390 { 722 },
391 { 500 },
392 { 500 },
393 { 500 },
394 { 500 },
395 { 389 },
396 { 389 },
397 { 278 },
398 { 500 },
399 { 444 },
400 { 667 },
401 { 444 },
402 { 444 },
403 { 389 },
404 { 400 },
405 { 275 },
406 { 400 },
407 { 541 },
408 } },
409 { "Times-BoldItalic", {
410 { 250 },
411 { 389 },
412 { 555 },
413 { 500 },
414 { 500 },
415 { 833 },
416 { 778 },
417 { 333 },
418 { 333 },
419 { 333 },
420 { 500 },
421 { 570 },
422 { 250 },
423 { 333 },
424 { 250 },
425 { 278 },
426 { 500 },
427 { 500 },
428 { 500 },
429 { 500 },
430 { 500 },
431 { 500 },
432 { 500 },
433 { 500 },
434 { 500 },
435 { 500 },
436 { 333 },
437 { 333 },
438 { 570 },
439 { 570 },
440 { 570 },
441 { 500 },
442 { 832 },
443 { 667 },
444 { 667 },
445 { 667 },
446 { 722 },
447 { 667 },
448 { 667 },
449 { 722 },
450 { 778 },
451 { 389 },
452 { 500 },
453 { 667 },
454 { 611 },
455 { 889 },
456 { 722 },
457 { 722 },
458 { 611 },
459 { 722 },
460 { 667 },
461 { 556 },
462 { 611 },
463 { 722 },
464 { 667 },
465 { 889 },
466 { 667 },
467 { 611 },
468 { 611 },
469 { 333 },
470 { 278 },
471 { 333 },
472 { 570 },
473 { 500 },
474 { 333 },
475 { 500 },
476 { 500 },
477 { 444 },
478 { 500 },
479 { 444 },
480 { 333 },
481 { 500 },
482 { 556 },
483 { 278 },
484 { 278 },
485 { 500 },
486 { 278 },
487 { 778 },
488 { 556 },
489 { 500 },
490 { 500 },
491 { 500 },
492 { 389 },
493 { 389 },
494 { 278 },
495 { 556 },
496 { 444 },
497 { 667 },
498 { 500 },
499 { 444 },
500 { 389 },
501 { 348 },
502 { 220 },
503 { 348 },
504 { 570 },
505 } },
506 };
507
508 void *
509 pdf_alloc(char *outopts)
510 {
511 struct termp *p;
512
513 if (NULL != (p = pspdf_alloc(outopts)))
514 p->type = TERMTYPE_PDF;
515
516 return(p);
517 }
518
519 void *
520 ps_alloc(char *outopts)
521 {
522 struct termp *p;
523
524 if (NULL != (p = pspdf_alloc(outopts)))
525 p->type = TERMTYPE_PS;
526
527 return(p);
528 }
529
530 static struct termp *
531 pspdf_alloc(char *outopts)
532 {
533 struct termp *p;
534 unsigned int pagex, pagey;
535 size_t marginx, marginy, lineheight;
536 const char *toks[2];
537 const char *pp;
538 char *v;
539
540 p = mandoc_calloc(1, sizeof(struct termp));
541 p->enc = TERMENC_ASCII;
542 p->ps = mandoc_calloc(1, sizeof(struct termp_ps));
543
544 p->advance = ps_advance;
545 p->begin = ps_begin;
546 p->end = ps_end;
547 p->endline = ps_endline;
548 p->hspan = ps_hspan;
549 p->letter = ps_letter;
550 p->setwidth = ps_setwidth;
551 p->width = ps_width;
552
553 toks[0] = "paper";
554 toks[1] = NULL;
555
556 pp = NULL;
557
558 while (outopts && *outopts)
559 switch (getsubopt(&outopts, UNCONST(toks), &v)) {
560 case 0:
561 pp = v;
562 break;
563 default:
564 break;
565 }
566
567 /* Default to US letter (millimetres). */
568
569 pagex = 216;
570 pagey = 279;
571
572 /*
573 * The ISO-269 paper sizes can be calculated automatically, but
574 * it would require bringing in -lm for pow() and I'd rather not
575 * do that. So just do it the easy way for now. Since this
576 * only happens once, I'm not terribly concerned.
577 */
578
579 if (pp && strcasecmp(pp, "letter")) {
580 if (0 == strcasecmp(pp, "a3")) {
581 pagex = 297;
582 pagey = 420;
583 } else if (0 == strcasecmp(pp, "a4")) {
584 pagex = 210;
585 pagey = 297;
586 } else if (0 == strcasecmp(pp, "a5")) {
587 pagex = 148;
588 pagey = 210;
589 } else if (0 == strcasecmp(pp, "legal")) {
590 pagex = 216;
591 pagey = 356;
592 } else if (2 != sscanf(pp, "%ux%u", &pagex, &pagey))
593 fprintf(stderr, "%s: Unknown paper\n", pp);
594 }
595
596 /*
597 * This MUST be defined before any PNT2AFM or AFM2PNT
598 * calculations occur.
599 */
600
601 p->ps->scale = 11;
602
603 /* Remember millimetres -> AFM units. */
604
605 pagex = PNT2AFM(p, ((double)pagex * 2.834));
606 pagey = PNT2AFM(p, ((double)pagey * 2.834));
607
608 /* Margins are 1/9 the page x and y. */
609
610 marginx = (size_t)((double)pagex / 9.0);
611 marginy = (size_t)((double)pagey / 9.0);
612
613 /* Line-height is 1.4em. */
614
615 lineheight = PNT2AFM(p, ((double)p->ps->scale * 1.4));
616
617 p->ps->width = p->ps->lastwidth = (size_t)pagex;
618 p->ps->height = (size_t)pagey;
619 p->ps->header = pagey - (marginy / 2) - (lineheight / 2);
620 p->ps->top = pagey - marginy;
621 p->ps->footer = (marginy / 2) - (lineheight / 2);
622 p->ps->bottom = marginy;
623 p->ps->left = marginx;
624 p->ps->lineheight = lineheight;
625
626 p->defrmargin = pagex - (marginx * 2);
627 return(p);
628 }
629
630 static void
631 ps_setwidth(struct termp *p, int iop, size_t width)
632 {
633 size_t lastwidth;
634
635 lastwidth = p->ps->width;
636 if (0 < iop)
637 p->ps->width += width;
638 else if (0 > iop)
639 p->ps->width -= width;
640 else
641 p->ps->width = width ? width : p->ps->lastwidth;
642 p->ps->lastwidth = lastwidth;
643 }
644
645 void
646 pspdf_free(void *arg)
647 {
648 struct termp *p;
649
650 p = (struct termp *)arg;
651
652 if (p->ps->psmarg)
653 free(p->ps->psmarg);
654 if (p->ps->pdfobjs)
655 free(p->ps->pdfobjs);
656
657 free(p->ps);
658 term_free(p);
659 }
660
661 static void
662 ps_printf(struct termp *p, const char *fmt, ...)
663 {
664 va_list ap;
665 int pos, len;
666
667 va_start(ap, fmt);
668
669 /*
670 * If we're running in regular mode, then pipe directly into
671 * vprintf(). If we're processing margins, then push the data
672 * into our growable margin buffer.
673 */
674
675 if ( ! (PS_MARGINS & p->ps->flags)) {
676 len = vprintf(fmt, ap);
677 va_end(ap);
678 p->ps->pdfbytes += len < 0 ? 0 : (size_t)len;
679 return;
680 }
681
682 /*
683 * XXX: I assume that the in-margin print won't exceed
684 * PS_BUFSLOP (128 bytes), which is reasonable but still an
685 * assumption that will cause pukeage if it's not the case.
686 */
687
688 ps_growbuf(p, PS_BUFSLOP);
689
690 pos = (int)p->ps->psmargcur;
691 vsnprintf(&p->ps->psmarg[pos], PS_BUFSLOP, fmt, ap);
692
693 va_end(ap);
694
695 p->ps->psmargcur = strlen(p->ps->psmarg);
696 }
697
698 static void
699 ps_putchar(struct termp *p, char c)
700 {
701 int pos;
702
703 /* See ps_printf(). */
704
705 if ( ! (PS_MARGINS & p->ps->flags)) {
706 putchar(c);
707 p->ps->pdfbytes++;
708 return;
709 }
710
711 ps_growbuf(p, 2);
712
713 pos = (int)p->ps->psmargcur++;
714 p->ps->psmarg[pos++] = c;
715 p->ps->psmarg[pos] = '\0';
716 }
717
718 static void
719 pdf_obj(struct termp *p, size_t obj)
720 {
721
722 assert(obj > 0);
723
724 if ((obj - 1) >= p->ps->pdfobjsz) {
725 p->ps->pdfobjsz = obj + 128;
726 p->ps->pdfobjs = mandoc_reallocarray(p->ps->pdfobjs,
727 p->ps->pdfobjsz, sizeof(size_t));
728 }
729
730 p->ps->pdfobjs[(int)obj - 1] = p->ps->pdfbytes;
731 ps_printf(p, "%zu 0 obj\n", obj);
732 }
733
734 static void
735 ps_closepage(struct termp *p)
736 {
737 int i;
738 size_t len, base;
739
740 /*
741 * Close out a page that we've already flushed to output. In
742 * PostScript, we simply note that the page must be showed. In
743 * PDF, we must now create the Length, Resource, and Page node
744 * for the page contents.
745 */
746
747 assert(p->ps->psmarg && p->ps->psmarg[0]);
748 ps_printf(p, "%s", p->ps->psmarg);
749
750 if (TERMTYPE_PS != p->type) {
751 ps_printf(p, "ET\n");
752
753 len = p->ps->pdfbytes - p->ps->pdflastpg;
754 base = p->ps->pages * 4 + p->ps->pdfbody;
755
756 ps_printf(p, "endstream\nendobj\n");
757
758 /* Length of content. */
759 pdf_obj(p, base + 1);
760 ps_printf(p, "%zu\nendobj\n", len);
761
762 /* Resource for content. */
763 pdf_obj(p, base + 2);
764 ps_printf(p, "<<\n/ProcSet [/PDF /Text]\n");
765 ps_printf(p, "/Font <<\n");
766 for (i = 0; i < (int)TERMFONT__MAX; i++)
767 ps_printf(p, "/F%d %d 0 R\n", i, 3 + i);
768 ps_printf(p, ">>\n>>\n");
769
770 /* Page node. */
771 pdf_obj(p, base + 3);
772 ps_printf(p, "<<\n");
773 ps_printf(p, "/Type /Page\n");
774 ps_printf(p, "/Parent 2 0 R\n");
775 ps_printf(p, "/Resources %zu 0 R\n", base + 2);
776 ps_printf(p, "/Contents %zu 0 R\n", base);
777 ps_printf(p, ">>\nendobj\n");
778 } else
779 ps_printf(p, "showpage\n");
780
781 p->ps->pages++;
782 p->ps->psrow = p->ps->top;
783 assert( ! (PS_NEWPAGE & p->ps->flags));
784 p->ps->flags |= PS_NEWPAGE;
785 }
786
787 static void
788 ps_end(struct termp *p)
789 {
790 size_t i, xref, base;
791
792 /*
793 * At the end of the file, do one last showpage. This is the
794 * same behaviour as groff(1) and works for multiple pages as
795 * well as just one.
796 */
797
798 if ( ! (PS_NEWPAGE & p->ps->flags)) {
799 assert(0 == p->ps->flags);
800 assert('\0' == p->ps->last);
801 ps_closepage(p);
802 }
803
804 if (TERMTYPE_PS == p->type) {
805 ps_printf(p, "%%%%Trailer\n");
806 ps_printf(p, "%%%%Pages: %zu\n", p->ps->pages);
807 ps_printf(p, "%%%%EOF\n");
808 return;
809 }
810
811 pdf_obj(p, 2);
812 ps_printf(p, "<<\n/Type /Pages\n");
813 ps_printf(p, "/MediaBox [0 0 %zu %zu]\n",
814 (size_t)AFM2PNT(p, p->ps->width),
815 (size_t)AFM2PNT(p, p->ps->height));
816
817 ps_printf(p, "/Count %zu\n", p->ps->pages);
818 ps_printf(p, "/Kids [");
819
820 for (i = 0; i < p->ps->pages; i++)
821 ps_printf(p, " %zu 0 R", i * 4 + p->ps->pdfbody + 3);
822
823 base = (p->ps->pages - 1) * 4 + p->ps->pdfbody + 4;
824
825 ps_printf(p, "]\n>>\nendobj\n");
826 pdf_obj(p, base);
827 ps_printf(p, "<<\n");
828 ps_printf(p, "/Type /Catalog\n");
829 ps_printf(p, "/Pages 2 0 R\n");
830 ps_printf(p, ">>\n");
831 xref = p->ps->pdfbytes;
832 ps_printf(p, "xref\n");
833 ps_printf(p, "0 %zu\n", base + 1);
834 ps_printf(p, "0000000000 65535 f \n");
835
836 for (i = 0; i < base; i++)
837 ps_printf(p, "%.10zu 00000 n \n",
838 p->ps->pdfobjs[(int)i]);
839
840 ps_printf(p, "trailer\n");
841 ps_printf(p, "<<\n");
842 ps_printf(p, "/Size %zu\n", base + 1);
843 ps_printf(p, "/Root %zu 0 R\n", base);
844 ps_printf(p, "/Info 1 0 R\n");
845 ps_printf(p, ">>\n");
846 ps_printf(p, "startxref\n");
847 ps_printf(p, "%zu\n", xref);
848 ps_printf(p, "%%%%EOF\n");
849 }
850
851 static void
852 ps_begin(struct termp *p)
853 {
854 int i;
855
856 /*
857 * Print margins into margin buffer. Nothing gets output to the
858 * screen yet, so we don't need to initialise the primary state.
859 */
860
861 if (p->ps->psmarg) {
862 assert(p->ps->psmargsz);
863 p->ps->psmarg[0] = '\0';
864 }
865
866 /*p->ps->pdfbytes = 0;*/
867 p->ps->psmargcur = 0;
868 p->ps->flags = PS_MARGINS;
869 p->ps->pscol = p->ps->left;
870 p->ps->psrow = p->ps->header;
871
872 ps_setfont(p, TERMFONT_NONE);
873
874 (*p->headf)(p, p->argf);
875 (*p->endline)(p);
876
877 p->ps->pscol = p->ps->left;
878 p->ps->psrow = p->ps->footer;
879
880 (*p->footf)(p, p->argf);
881 (*p->endline)(p);
882
883 p->ps->flags &= ~PS_MARGINS;
884
885 assert(0 == p->ps->flags);
886 assert(p->ps->psmarg);
887 assert('\0' != p->ps->psmarg[0]);
888
889 /*
890 * Print header and initialise page state. Following this,
891 * stuff gets printed to the screen, so make sure we're sane.
892 */
893
894 if (TERMTYPE_PS == p->type) {
895 ps_printf(p, "%%!PS-Adobe-3.0\n");
896 ps_printf(p, "%%%%DocumentData: Clean7Bit\n");
897 ps_printf(p, "%%%%Orientation: Portrait\n");
898 ps_printf(p, "%%%%Pages: (atend)\n");
899 ps_printf(p, "%%%%PageOrder: Ascend\n");
900 ps_printf(p, "%%%%DocumentMedia: "
901 "Default %zu %zu 0 () ()\n",
902 (size_t)AFM2PNT(p, p->ps->width),
903 (size_t)AFM2PNT(p, p->ps->height));
904 ps_printf(p, "%%%%DocumentNeededResources: font");
905
906 for (i = 0; i < (int)TERMFONT__MAX; i++)
907 ps_printf(p, " %s", fonts[i].name);
908
909 ps_printf(p, "\n%%%%EndComments\n");
910 } else {
911 ps_printf(p, "%%PDF-1.1\n");
912 pdf_obj(p, 1);
913 ps_printf(p, "<<\n");
914 ps_printf(p, ">>\n");
915 ps_printf(p, "endobj\n");
916
917 for (i = 0; i < (int)TERMFONT__MAX; i++) {
918 pdf_obj(p, (size_t)i + 3);
919 ps_printf(p, "<<\n");
920 ps_printf(p, "/Type /Font\n");
921 ps_printf(p, "/Subtype /Type1\n");
922 ps_printf(p, "/Name /F%d\n", i);
923 ps_printf(p, "/BaseFont /%s\n", fonts[i].name);
924 ps_printf(p, ">>\n");
925 }
926 }
927
928 p->ps->pdfbody = (size_t)TERMFONT__MAX + 3;
929 p->ps->pscol = p->ps->left;
930 p->ps->psrow = p->ps->top;
931 p->ps->flags |= PS_NEWPAGE;
932 ps_setfont(p, TERMFONT_NONE);
933 }
934
935 static void
936 ps_pletter(struct termp *p, int c)
937 {
938 int f;
939
940 /*
941 * If we haven't opened a page context, then output that we're
942 * in a new page and make sure the font is correctly set.
943 */
944
945 if (PS_NEWPAGE & p->ps->flags) {
946 if (TERMTYPE_PS == p->type) {
947 ps_printf(p, "%%%%Page: %zu %zu\n",
948 p->ps->pages + 1, p->ps->pages + 1);
949 ps_printf(p, "/%s %zu selectfont\n",
950 fonts[(int)p->ps->lastf].name,
951 p->ps->scale);
952 } else {
953 pdf_obj(p, p->ps->pdfbody +
954 p->ps->pages * 4);
955 ps_printf(p, "<<\n");
956 ps_printf(p, "/Length %zu 0 R\n",
957 p->ps->pdfbody + 1 + p->ps->pages * 4);
958 ps_printf(p, ">>\nstream\n");
959 }
960 p->ps->pdflastpg = p->ps->pdfbytes;
961 p->ps->flags &= ~PS_NEWPAGE;
962 }
963
964 /*
965 * If we're not in a PostScript "word" context, then open one
966 * now at the current cursor.
967 */
968
969 if ( ! (PS_INLINE & p->ps->flags)) {
970 if (TERMTYPE_PS != p->type) {
971 ps_printf(p, "BT\n/F%d %zu Tf\n",
972 (int)p->ps->lastf, p->ps->scale);
973 ps_printf(p, "%.3f %.3f Td\n(",
974 AFM2PNT(p, p->ps->pscol),
975 AFM2PNT(p, p->ps->psrow));
976 } else
977 ps_printf(p, "%.3f %.3f moveto\n(",
978 AFM2PNT(p, p->ps->pscol),
979 AFM2PNT(p, p->ps->psrow));
980 p->ps->flags |= PS_INLINE;
981 }
982
983 assert( ! (PS_NEWPAGE & p->ps->flags));
984
985 /*
986 * We need to escape these characters as per the PostScript
987 * specification. We would also escape non-graphable characters
988 * (like tabs), but none of them would get to this point and
989 * it's superfluous to abort() on them.
990 */
991
992 switch (c) {
993 case '(':
994 /* FALLTHROUGH */
995 case ')':
996 /* FALLTHROUGH */
997 case '\\':
998 ps_putchar(p, '\\');
999 break;
1000 default:
1001 break;
1002 }
1003
1004 /* Write the character and adjust where we are on the page. */
1005
1006 f = (int)p->ps->lastf;
1007
1008 if (c <= 32 || c - 32 >= MAXCHAR)
1009 c = 32;
1010
1011 ps_putchar(p, (char)c);
1012 c -= 32;
1013 p->ps->pscol += (size_t)fonts[f].gly[c].wx;
1014 }
1015
1016 static void
1017 ps_pclose(struct termp *p)
1018 {
1019
1020 /*
1021 * Spit out that we're exiting a word context (this is a
1022 * "partial close" because we don't check the last-char buffer
1023 * or anything).
1024 */
1025
1026 if ( ! (PS_INLINE & p->ps->flags))
1027 return;
1028
1029 if (TERMTYPE_PS != p->type) {
1030 ps_printf(p, ") Tj\nET\n");
1031 } else
1032 ps_printf(p, ") show\n");
1033
1034 p->ps->flags &= ~PS_INLINE;
1035 }
1036
1037 static void
1038 ps_fclose(struct termp *p)
1039 {
1040
1041 /*
1042 * Strong closure: if we have a last-char, spit it out after
1043 * checking that we're in the right font mode. This will of
1044 * course open a new scope, if applicable.
1045 *
1046 * Following this, close out any scope that's open.
1047 */
1048
1049 if (p->ps->last != '\0') {
1050 assert(p->ps->last != 8);
1051 if (p->ps->nextf != p->ps->lastf) {
1052 ps_pclose(p);
1053 ps_setfont(p, p->ps->nextf);
1054 }
1055 p->ps->nextf = TERMFONT_NONE;
1056 ps_pletter(p, p->ps->last);
1057 p->ps->last = '\0';
1058 }
1059
1060 if ( ! (PS_INLINE & p->ps->flags))
1061 return;
1062
1063 ps_pclose(p);
1064 }
1065
1066 static void
1067 ps_letter(struct termp *p, int arg)
1068 {
1069 char c;
1070
1071 c = arg >= 128 || arg <= 0 ? '?' : arg;
1072
1073 /*
1074 * When receiving an initial character, merely buffer it,
1075 * because a backspace might follow to specify formatting.
1076 * When receiving a backspace, use the buffered character
1077 * to build the font instruction and clear the buffer.
1078 * Only when there are two non-backspace characters in a row,
1079 * activate the font built so far and print the first of them;
1080 * the second, again, merely gets buffered.
1081 * The final character will get printed from ps_fclose().
1082 */
1083
1084 if (c == 8) {
1085 assert(p->ps->last != '\0');
1086 assert(p->ps->last != 8);
1087 if ('_' == p->ps->last) {
1088 switch (p->ps->nextf) {
1089 case TERMFONT_BI:
1090 break;
1091 case TERMFONT_BOLD:
1092 p->ps->nextf = TERMFONT_BI;
1093 break;
1094 default:
1095 p->ps->nextf = TERMFONT_UNDER;
1096 }
1097 } else {
1098 switch (p->ps->nextf) {
1099 case TERMFONT_BI:
1100 break;
1101 case TERMFONT_UNDER:
1102 p->ps->nextf = TERMFONT_BI;
1103 break;
1104 default:
1105 p->ps->nextf = TERMFONT_BOLD;
1106 }
1107 }
1108 } else if (p->ps->last != '\0' && p->ps->last != 8) {
1109 if (p->ps->nextf != p->ps->lastf) {
1110 ps_pclose(p);
1111 ps_setfont(p, p->ps->nextf);
1112 }
1113 p->ps->nextf = TERMFONT_NONE;
1114 ps_pletter(p, p->ps->last);
1115 }
1116 p->ps->last = c;
1117 }
1118
1119 static void
1120 ps_advance(struct termp *p, size_t len)
1121 {
1122
1123 /*
1124 * Advance some spaces. This can probably be made smarter,
1125 * i.e., to have multiple space-separated words in the same
1126 * scope, but this is easier: just close out the current scope
1127 * and readjust our column settings.
1128 */
1129
1130 ps_fclose(p);
1131 p->ps->pscol += len;
1132 }
1133
1134 static void
1135 ps_endline(struct termp *p)
1136 {
1137
1138 /* Close out any scopes we have open: we're at eoln. */
1139
1140 ps_fclose(p);
1141
1142 /*
1143 * If we're in the margin, don't try to recalculate our current
1144 * row. XXX: if the column tries to be fancy with multiple
1145 * lines, we'll do nasty stuff.
1146 */
1147
1148 if (PS_MARGINS & p->ps->flags)
1149 return;
1150
1151 /* Left-justify. */
1152
1153 p->ps->pscol = p->ps->left;
1154
1155 /* If we haven't printed anything, return. */
1156
1157 if (PS_NEWPAGE & p->ps->flags)
1158 return;
1159
1160 /*
1161 * Put us down a line. If we're at the page bottom, spit out a
1162 * showpage and restart our row.
1163 */
1164
1165 if (p->ps->psrow >= p->ps->lineheight + p->ps->bottom) {
1166 p->ps->psrow -= p->ps->lineheight;
1167 return;
1168 }
1169
1170 ps_closepage(p);
1171 }
1172
1173 static void
1174 ps_setfont(struct termp *p, enum termfont f)
1175 {
1176
1177 assert(f < TERMFONT__MAX);
1178 p->ps->lastf = f;
1179
1180 /*
1181 * If we're still at the top of the page, let the font-setting
1182 * be delayed until we actually have stuff to print.
1183 */
1184
1185 if (PS_NEWPAGE & p->ps->flags)
1186 return;
1187
1188 if (TERMTYPE_PS == p->type)
1189 ps_printf(p, "/%s %zu selectfont\n",
1190 fonts[(int)f].name, p->ps->scale);
1191 else
1192 ps_printf(p, "/F%d %zu Tf\n",
1193 (int)f, p->ps->scale);
1194 }
1195
1196 static size_t
1197 ps_width(const struct termp *p, int c)
1198 {
1199
1200 if (c <= 32 || c - 32 >= MAXCHAR)
1201 c = 0;
1202 else
1203 c -= 32;
1204
1205 return((size_t)fonts[(int)TERMFONT_NONE].gly[c].wx);
1206 }
1207
1208 static double
1209 ps_hspan(const struct termp *p, const struct roffsu *su)
1210 {
1211 double r;
1212
1213 /*
1214 * All of these measurements are derived by converting from the
1215 * native measurement to AFM units.
1216 */
1217 switch (su->unit) {
1218 case SCALE_BU:
1219 /*
1220 * Traditionally, the default unit is fixed to the
1221 * output media. So this would refer to the point. In
1222 * mandoc(1), however, we stick to the default terminal
1223 * scaling unit so that output is the same regardless
1224 * the media.
1225 */
1226 r = PNT2AFM(p, su->scale * 72.0 / 240.0);
1227 break;
1228 case SCALE_CM:
1229 r = PNT2AFM(p, su->scale * 72.0 / 2.54);
1230 break;
1231 case SCALE_EM:
1232 r = su->scale *
1233 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx;
1234 break;
1235 case SCALE_EN:
1236 r = su->scale *
1237 fonts[(int)TERMFONT_NONE].gly[110 - 32].wx;
1238 break;
1239 case SCALE_IN:
1240 r = PNT2AFM(p, su->scale * 72.0);
1241 break;
1242 case SCALE_MM:
1243 r = su->scale *
1244 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx / 100.0;
1245 break;
1246 case SCALE_PC:
1247 r = PNT2AFM(p, su->scale * 12.0);
1248 break;
1249 case SCALE_PT:
1250 r = PNT2AFM(p, su->scale * 1.0);
1251 break;
1252 case SCALE_VS:
1253 r = su->scale * p->ps->lineheight;
1254 break;
1255 default:
1256 r = su->scale;
1257 break;
1258 }
1259
1260 return(r);
1261 }
1262
1263 static void
1264 ps_growbuf(struct termp *p, size_t sz)
1265 {
1266 if (p->ps->psmargcur + sz <= p->ps->psmargsz)
1267 return;
1268
1269 if (sz < PS_BUFSLOP)
1270 sz = PS_BUFSLOP;
1271
1272 p->ps->psmargsz += sz;
1273 p->ps->psmarg = mandoc_realloc(p->ps->psmarg, p->ps->psmargsz);
1274 }
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