1 /* $OpenBSD: term_ps.c,v 1.45 2016/07/19 13:30:16 schwarze Exp $ */ 2 /* 3 * Copyright (c) 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv> 4 * Copyright (c) 2014, 2015 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 AUTHORS DISCLAIM ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHORS 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 <sys/types.h> 19 20 #include <assert.h> 21 #include <err.h> 22 #include <stdarg.h> 23 #include <stdint.h> 24 #include <stdio.h> 25 #include <stdlib.h> 26 #include <string.h> 27 #include <unistd.h> 28 29 #include "mandoc_aux.h" 30 #include "out.h" 31 #include "term.h" 32 #include "manconf.h" 33 #include "main.h" 34 35 /* These work the buffer used by the header and footer. */ 36 #define PS_BUFSLOP 128 37 38 /* Convert PostScript point "x" to an AFM unit. */ 39 #define PNT2AFM(p, x) \ 40 (size_t)((double)(x) * (1000.0 / (double)(p)->ps->scale)) 41 42 /* Convert an AFM unit "x" to a PostScript points */ 43 #define AFM2PNT(p, x) \ 44 ((double)(x) / (1000.0 / (double)(p)->ps->scale)) 45 46 struct glyph { 47 unsigned short wx; /* WX in AFM */ 48 }; 49 50 struct font { 51 const char *name; /* FontName in AFM */ 52 #define MAXCHAR 95 /* total characters we can handle */ 53 struct glyph gly[MAXCHAR]; /* glyph metrics */ 54 }; 55 56 struct termp_ps { 57 int flags; 58 #define PS_INLINE (1 << 0) /* we're in a word */ 59 #define PS_MARGINS (1 << 1) /* we're in the margins */ 60 #define PS_NEWPAGE (1 << 2) /* new page, no words yet */ 61 #define PS_BACKSP (1 << 3) /* last character was backspace */ 62 size_t pscol; /* visible column (AFM units) */ 63 size_t pscolnext; /* used for overstrike */ 64 size_t psrow; /* visible row (AFM units) */ 65 char *psmarg; /* margin buf */ 66 size_t psmargsz; /* margin buf size */ 67 size_t psmargcur; /* cur index in margin buf */ 68 char last; /* last non-backspace seen */ 69 enum termfont lastf; /* last set font */ 70 enum termfont nextf; /* building next font here */ 71 size_t scale; /* font scaling factor */ 72 size_t pages; /* number of pages shown */ 73 size_t lineheight; /* line height (AFM units) */ 74 size_t top; /* body top (AFM units) */ 75 size_t bottom; /* body bottom (AFM units) */ 76 size_t height; /* page height (AFM units */ 77 size_t width; /* page width (AFM units) */ 78 size_t lastwidth; /* page width before last ll */ 79 size_t left; /* body left (AFM units) */ 80 size_t header; /* header pos (AFM units) */ 81 size_t footer; /* footer pos (AFM units) */ 82 size_t pdfbytes; /* current output byte */ 83 size_t pdflastpg; /* byte of last page mark */ 84 size_t pdfbody; /* start of body object */ 85 size_t *pdfobjs; /* table of object offsets */ 86 size_t pdfobjsz; /* size of pdfobjs */ 87 }; 88 89 static int ps_hspan(const struct termp *, 90 const struct roffsu *); 91 static size_t ps_width(const struct termp *, int); 92 static void ps_advance(struct termp *, size_t); 93 static void ps_begin(struct termp *); 94 static void ps_closepage(struct termp *); 95 static void ps_end(struct termp *); 96 static void ps_endline(struct termp *); 97 static void ps_fclose(struct termp *); 98 static void ps_growbuf(struct termp *, size_t); 99 static void ps_letter(struct termp *, int); 100 static void ps_pclose(struct termp *); 101 static void ps_pletter(struct termp *, int); 102 static void ps_printf(struct termp *, const char *, ...) 103 __attribute__((__format__ (printf, 2, 3))); 104 static void ps_putchar(struct termp *, char); 105 static void ps_setfont(struct termp *, enum termfont); 106 static void ps_setwidth(struct termp *, int, int); 107 static struct termp *pspdf_alloc(const struct manoutput *); 108 static void pdf_obj(struct termp *, size_t); 109 110 /* 111 * We define, for the time being, three fonts: bold, oblique/italic, and 112 * normal (roman). The following table hard-codes the font metrics for 113 * ASCII, i.e., 32--127. 114 */ 115 116 static const struct font fonts[TERMFONT__MAX] = { 117 { "Times-Roman", { 118 { 250 }, 119 { 333 }, 120 { 408 }, 121 { 500 }, 122 { 500 }, 123 { 833 }, 124 { 778 }, 125 { 333 }, 126 { 333 }, 127 { 333 }, 128 { 500 }, 129 { 564 }, 130 { 250 }, 131 { 333 }, 132 { 250 }, 133 { 278 }, 134 { 500 }, 135 { 500 }, 136 { 500 }, 137 { 500 }, 138 { 500 }, 139 { 500 }, 140 { 500 }, 141 { 500 }, 142 { 500 }, 143 { 500 }, 144 { 278 }, 145 { 278 }, 146 { 564 }, 147 { 564 }, 148 { 564 }, 149 { 444 }, 150 { 921 }, 151 { 722 }, 152 { 667 }, 153 { 667 }, 154 { 722 }, 155 { 611 }, 156 { 556 }, 157 { 722 }, 158 { 722 }, 159 { 333 }, 160 { 389 }, 161 { 722 }, 162 { 611 }, 163 { 889 }, 164 { 722 }, 165 { 722 }, 166 { 556 }, 167 { 722 }, 168 { 667 }, 169 { 556 }, 170 { 611 }, 171 { 722 }, 172 { 722 }, 173 { 944 }, 174 { 722 }, 175 { 722 }, 176 { 611 }, 177 { 333 }, 178 { 278 }, 179 { 333 }, 180 { 469 }, 181 { 500 }, 182 { 333 }, 183 { 444 }, 184 { 500 }, 185 { 444 }, 186 { 500}, 187 { 444}, 188 { 333}, 189 { 500}, 190 { 500}, 191 { 278}, 192 { 278}, 193 { 500}, 194 { 278}, 195 { 778}, 196 { 500}, 197 { 500}, 198 { 500}, 199 { 500}, 200 { 333}, 201 { 389}, 202 { 278}, 203 { 500}, 204 { 500}, 205 { 722}, 206 { 500}, 207 { 500}, 208 { 444}, 209 { 480}, 210 { 200}, 211 { 480}, 212 { 541}, 213 } }, 214 { "Times-Bold", { 215 { 250 }, 216 { 333 }, 217 { 555 }, 218 { 500 }, 219 { 500 }, 220 { 1000 }, 221 { 833 }, 222 { 333 }, 223 { 333 }, 224 { 333 }, 225 { 500 }, 226 { 570 }, 227 { 250 }, 228 { 333 }, 229 { 250 }, 230 { 278 }, 231 { 500 }, 232 { 500 }, 233 { 500 }, 234 { 500 }, 235 { 500 }, 236 { 500 }, 237 { 500 }, 238 { 500 }, 239 { 500 }, 240 { 500 }, 241 { 333 }, 242 { 333 }, 243 { 570 }, 244 { 570 }, 245 { 570 }, 246 { 500 }, 247 { 930 }, 248 { 722 }, 249 { 667 }, 250 { 722 }, 251 { 722 }, 252 { 667 }, 253 { 611 }, 254 { 778 }, 255 { 778 }, 256 { 389 }, 257 { 500 }, 258 { 778 }, 259 { 667 }, 260 { 944 }, 261 { 722 }, 262 { 778 }, 263 { 611 }, 264 { 778 }, 265 { 722 }, 266 { 556 }, 267 { 667 }, 268 { 722 }, 269 { 722 }, 270 { 1000 }, 271 { 722 }, 272 { 722 }, 273 { 667 }, 274 { 333 }, 275 { 278 }, 276 { 333 }, 277 { 581 }, 278 { 500 }, 279 { 333 }, 280 { 500 }, 281 { 556 }, 282 { 444 }, 283 { 556 }, 284 { 444 }, 285 { 333 }, 286 { 500 }, 287 { 556 }, 288 { 278 }, 289 { 333 }, 290 { 556 }, 291 { 278 }, 292 { 833 }, 293 { 556 }, 294 { 500 }, 295 { 556 }, 296 { 556 }, 297 { 444 }, 298 { 389 }, 299 { 333 }, 300 { 556 }, 301 { 500 }, 302 { 722 }, 303 { 500 }, 304 { 500 }, 305 { 444 }, 306 { 394 }, 307 { 220 }, 308 { 394 }, 309 { 520 }, 310 } }, 311 { "Times-Italic", { 312 { 250 }, 313 { 333 }, 314 { 420 }, 315 { 500 }, 316 { 500 }, 317 { 833 }, 318 { 778 }, 319 { 333 }, 320 { 333 }, 321 { 333 }, 322 { 500 }, 323 { 675 }, 324 { 250 }, 325 { 333 }, 326 { 250 }, 327 { 278 }, 328 { 500 }, 329 { 500 }, 330 { 500 }, 331 { 500 }, 332 { 500 }, 333 { 500 }, 334 { 500 }, 335 { 500 }, 336 { 500 }, 337 { 500 }, 338 { 333 }, 339 { 333 }, 340 { 675 }, 341 { 675 }, 342 { 675 }, 343 { 500 }, 344 { 920 }, 345 { 611 }, 346 { 611 }, 347 { 667 }, 348 { 722 }, 349 { 611 }, 350 { 611 }, 351 { 722 }, 352 { 722 }, 353 { 333 }, 354 { 444 }, 355 { 667 }, 356 { 556 }, 357 { 833 }, 358 { 667 }, 359 { 722 }, 360 { 611 }, 361 { 722 }, 362 { 611 }, 363 { 500 }, 364 { 556 }, 365 { 722 }, 366 { 611 }, 367 { 833 }, 368 { 611 }, 369 { 556 }, 370 { 556 }, 371 { 389 }, 372 { 278 }, 373 { 389 }, 374 { 422 }, 375 { 500 }, 376 { 333 }, 377 { 500 }, 378 { 500 }, 379 { 444 }, 380 { 500 }, 381 { 444 }, 382 { 278 }, 383 { 500 }, 384 { 500 }, 385 { 278 }, 386 { 278 }, 387 { 444 }, 388 { 278 }, 389 { 722 }, 390 { 500 }, 391 { 500 }, 392 { 500 }, 393 { 500 }, 394 { 389 }, 395 { 389 }, 396 { 278 }, 397 { 500 }, 398 { 444 }, 399 { 667 }, 400 { 444 }, 401 { 444 }, 402 { 389 }, 403 { 400 }, 404 { 275 }, 405 { 400 }, 406 { 541 }, 407 } }, 408 { "Times-BoldItalic", { 409 { 250 }, 410 { 389 }, 411 { 555 }, 412 { 500 }, 413 { 500 }, 414 { 833 }, 415 { 778 }, 416 { 333 }, 417 { 333 }, 418 { 333 }, 419 { 500 }, 420 { 570 }, 421 { 250 }, 422 { 333 }, 423 { 250 }, 424 { 278 }, 425 { 500 }, 426 { 500 }, 427 { 500 }, 428 { 500 }, 429 { 500 }, 430 { 500 }, 431 { 500 }, 432 { 500 }, 433 { 500 }, 434 { 500 }, 435 { 333 }, 436 { 333 }, 437 { 570 }, 438 { 570 }, 439 { 570 }, 440 { 500 }, 441 { 832 }, 442 { 667 }, 443 { 667 }, 444 { 667 }, 445 { 722 }, 446 { 667 }, 447 { 667 }, 448 { 722 }, 449 { 778 }, 450 { 389 }, 451 { 500 }, 452 { 667 }, 453 { 611 }, 454 { 889 }, 455 { 722 }, 456 { 722 }, 457 { 611 }, 458 { 722 }, 459 { 667 }, 460 { 556 }, 461 { 611 }, 462 { 722 }, 463 { 667 }, 464 { 889 }, 465 { 667 }, 466 { 611 }, 467 { 611 }, 468 { 333 }, 469 { 278 }, 470 { 333 }, 471 { 570 }, 472 { 500 }, 473 { 333 }, 474 { 500 }, 475 { 500 }, 476 { 444 }, 477 { 500 }, 478 { 444 }, 479 { 333 }, 480 { 500 }, 481 { 556 }, 482 { 278 }, 483 { 278 }, 484 { 500 }, 485 { 278 }, 486 { 778 }, 487 { 556 }, 488 { 500 }, 489 { 500 }, 490 { 500 }, 491 { 389 }, 492 { 389 }, 493 { 278 }, 494 { 556 }, 495 { 444 }, 496 { 667 }, 497 { 500 }, 498 { 444 }, 499 { 389 }, 500 { 348 }, 501 { 220 }, 502 { 348 }, 503 { 570 }, 504 } }, 505 }; 506 507 void * 508 pdf_alloc(const struct manoutput *outopts) 509 { 510 struct termp *p; 511 512 if (NULL != (p = pspdf_alloc(outopts))) 513 p->type = TERMTYPE_PDF; 514 515 return p; 516 } 517 518 void * 519 ps_alloc(const struct manoutput *outopts) 520 { 521 struct termp *p; 522 523 if (NULL != (p = pspdf_alloc(outopts))) 524 p->type = TERMTYPE_PS; 525 526 return p; 527 } 528 529 static struct termp * 530 pspdf_alloc(const struct manoutput *outopts) 531 { 532 struct termp *p; 533 unsigned int pagex, pagey; 534 size_t marginx, marginy, lineheight; 535 const char *pp; 536 537 p = mandoc_calloc(1, sizeof(struct termp)); 538 p->enc = TERMENC_ASCII; 539 p->fontq = mandoc_reallocarray(NULL, 540 (p->fontsz = 8), sizeof(enum termfont)); 541 p->fontq[0] = p->fontl = TERMFONT_NONE; 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 /* Default to US letter (millimetres). */ 554 555 pagex = 216; 556 pagey = 279; 557 558 /* 559 * The ISO-269 paper sizes can be calculated automatically, but 560 * it would require bringing in -lm for pow() and I'd rather not 561 * do that. So just do it the easy way for now. Since this 562 * only happens once, I'm not terribly concerned. 563 */ 564 565 pp = outopts->paper; 566 if (pp && strcasecmp(pp, "letter")) { 567 if (0 == strcasecmp(pp, "a3")) { 568 pagex = 297; 569 pagey = 420; 570 } else if (0 == strcasecmp(pp, "a4")) { 571 pagex = 210; 572 pagey = 297; 573 } else if (0 == strcasecmp(pp, "a5")) { 574 pagex = 148; 575 pagey = 210; 576 } else if (0 == strcasecmp(pp, "legal")) { 577 pagex = 216; 578 pagey = 356; 579 } else if (2 != sscanf(pp, "%ux%u", &pagex, &pagey)) 580 warnx("%s: Unknown paper", pp); 581 } 582 583 /* 584 * This MUST be defined before any PNT2AFM or AFM2PNT 585 * calculations occur. 586 */ 587 588 p->ps->scale = 11; 589 590 /* Remember millimetres -> AFM units. */ 591 592 pagex = PNT2AFM(p, ((double)pagex * 2.834)); 593 pagey = PNT2AFM(p, ((double)pagey * 2.834)); 594 595 /* Margins are 1/9 the page x and y. */ 596 597 marginx = (size_t)((double)pagex / 9.0); 598 marginy = (size_t)((double)pagey / 9.0); 599 600 /* Line-height is 1.4em. */ 601 602 lineheight = PNT2AFM(p, ((double)p->ps->scale * 1.4)); 603 604 p->ps->width = p->ps->lastwidth = (size_t)pagex; 605 p->ps->height = (size_t)pagey; 606 p->ps->header = pagey - (marginy / 2) - (lineheight / 2); 607 p->ps->top = pagey - marginy; 608 p->ps->footer = (marginy / 2) - (lineheight / 2); 609 p->ps->bottom = marginy; 610 p->ps->left = marginx; 611 p->ps->lineheight = lineheight; 612 613 p->defrmargin = pagex - (marginx * 2); 614 return p; 615 } 616 617 static void 618 ps_setwidth(struct termp *p, int iop, int width) 619 { 620 size_t lastwidth; 621 622 lastwidth = p->ps->width; 623 if (iop > 0) 624 p->ps->width += width; 625 else if (iop == 0) 626 p->ps->width = width ? (size_t)width : p->ps->lastwidth; 627 else if (p->ps->width > (size_t)width) 628 p->ps->width -= width; 629 else 630 p->ps->width = 0; 631 p->ps->lastwidth = lastwidth; 632 } 633 634 void 635 pspdf_free(void *arg) 636 { 637 struct termp *p; 638 639 p = (struct termp *)arg; 640 641 free(p->ps->psmarg); 642 free(p->ps->pdfobjs); 643 644 free(p->ps); 645 term_free(p); 646 } 647 648 static void 649 ps_printf(struct termp *p, const char *fmt, ...) 650 { 651 va_list ap; 652 int pos, len; 653 654 va_start(ap, fmt); 655 656 /* 657 * If we're running in regular mode, then pipe directly into 658 * vprintf(). If we're processing margins, then push the data 659 * into our growable margin buffer. 660 */ 661 662 if ( ! (PS_MARGINS & p->ps->flags)) { 663 len = vprintf(fmt, ap); 664 va_end(ap); 665 p->ps->pdfbytes += len < 0 ? 0 : (size_t)len; 666 return; 667 } 668 669 /* 670 * XXX: I assume that the in-margin print won't exceed 671 * PS_BUFSLOP (128 bytes), which is reasonable but still an 672 * assumption that will cause pukeage if it's not the case. 673 */ 674 675 ps_growbuf(p, PS_BUFSLOP); 676 677 pos = (int)p->ps->psmargcur; 678 vsnprintf(&p->ps->psmarg[pos], PS_BUFSLOP, fmt, ap); 679 680 va_end(ap); 681 682 p->ps->psmargcur = strlen(p->ps->psmarg); 683 } 684 685 static void 686 ps_putchar(struct termp *p, char c) 687 { 688 int pos; 689 690 /* See ps_printf(). */ 691 692 if ( ! (PS_MARGINS & p->ps->flags)) { 693 putchar(c); 694 p->ps->pdfbytes++; 695 return; 696 } 697 698 ps_growbuf(p, 2); 699 700 pos = (int)p->ps->psmargcur++; 701 p->ps->psmarg[pos++] = c; 702 p->ps->psmarg[pos] = '\0'; 703 } 704 705 static void 706 pdf_obj(struct termp *p, size_t obj) 707 { 708 709 assert(obj > 0); 710 711 if ((obj - 1) >= p->ps->pdfobjsz) { 712 p->ps->pdfobjsz = obj + 128; 713 p->ps->pdfobjs = mandoc_reallocarray(p->ps->pdfobjs, 714 p->ps->pdfobjsz, sizeof(size_t)); 715 } 716 717 p->ps->pdfobjs[(int)obj - 1] = p->ps->pdfbytes; 718 ps_printf(p, "%zu 0 obj\n", obj); 719 } 720 721 static void 722 ps_closepage(struct termp *p) 723 { 724 int i; 725 size_t len, base; 726 727 /* 728 * Close out a page that we've already flushed to output. In 729 * PostScript, we simply note that the page must be showed. In 730 * PDF, we must now create the Length, Resource, and Page node 731 * for the page contents. 732 */ 733 734 assert(p->ps->psmarg && p->ps->psmarg[0]); 735 ps_printf(p, "%s", p->ps->psmarg); 736 737 if (TERMTYPE_PS != p->type) { 738 ps_printf(p, "ET\n"); 739 740 len = p->ps->pdfbytes - p->ps->pdflastpg; 741 base = p->ps->pages * 4 + p->ps->pdfbody; 742 743 ps_printf(p, "endstream\nendobj\n"); 744 745 /* Length of content. */ 746 pdf_obj(p, base + 1); 747 ps_printf(p, "%zu\nendobj\n", len); 748 749 /* Resource for content. */ 750 pdf_obj(p, base + 2); 751 ps_printf(p, "<<\n/ProcSet [/PDF /Text]\n"); 752 ps_printf(p, "/Font <<\n"); 753 for (i = 0; i < (int)TERMFONT__MAX; i++) 754 ps_printf(p, "/F%d %d 0 R\n", i, 3 + i); 755 ps_printf(p, ">>\n>>\n"); 756 757 /* Page node. */ 758 pdf_obj(p, base + 3); 759 ps_printf(p, "<<\n"); 760 ps_printf(p, "/Type /Page\n"); 761 ps_printf(p, "/Parent 2 0 R\n"); 762 ps_printf(p, "/Resources %zu 0 R\n", base + 2); 763 ps_printf(p, "/Contents %zu 0 R\n", base); 764 ps_printf(p, ">>\nendobj\n"); 765 } else 766 ps_printf(p, "showpage\n"); 767 768 p->ps->pages++; 769 p->ps->psrow = p->ps->top; 770 assert( ! (PS_NEWPAGE & p->ps->flags)); 771 p->ps->flags |= PS_NEWPAGE; 772 } 773 774 static void 775 ps_end(struct termp *p) 776 { 777 size_t i, xref, base; 778 779 /* 780 * At the end of the file, do one last showpage. This is the 781 * same behaviour as groff(1) and works for multiple pages as 782 * well as just one. 783 */ 784 785 if ( ! (PS_NEWPAGE & p->ps->flags)) { 786 assert(0 == p->ps->flags); 787 assert('\0' == p->ps->last); 788 ps_closepage(p); 789 } 790 791 if (TERMTYPE_PS == p->type) { 792 ps_printf(p, "%%%%Trailer\n"); 793 ps_printf(p, "%%%%Pages: %zu\n", p->ps->pages); 794 ps_printf(p, "%%%%EOF\n"); 795 return; 796 } 797 798 pdf_obj(p, 2); 799 ps_printf(p, "<<\n/Type /Pages\n"); 800 ps_printf(p, "/MediaBox [0 0 %zu %zu]\n", 801 (size_t)AFM2PNT(p, p->ps->width), 802 (size_t)AFM2PNT(p, p->ps->height)); 803 804 ps_printf(p, "/Count %zu\n", p->ps->pages); 805 ps_printf(p, "/Kids ["); 806 807 for (i = 0; i < p->ps->pages; i++) 808 ps_printf(p, " %zu 0 R", i * 4 + p->ps->pdfbody + 3); 809 810 base = (p->ps->pages - 1) * 4 + p->ps->pdfbody + 4; 811 812 ps_printf(p, "]\n>>\nendobj\n"); 813 pdf_obj(p, base); 814 ps_printf(p, "<<\n"); 815 ps_printf(p, "/Type /Catalog\n"); 816 ps_printf(p, "/Pages 2 0 R\n"); 817 ps_printf(p, ">>\n"); 818 xref = p->ps->pdfbytes; 819 ps_printf(p, "xref\n"); 820 ps_printf(p, "0 %zu\n", base + 1); 821 ps_printf(p, "0000000000 65535 f \n"); 822 823 for (i = 0; i < base; i++) 824 ps_printf(p, "%.10zu 00000 n \n", 825 p->ps->pdfobjs[(int)i]); 826 827 ps_printf(p, "trailer\n"); 828 ps_printf(p, "<<\n"); 829 ps_printf(p, "/Size %zu\n", base + 1); 830 ps_printf(p, "/Root %zu 0 R\n", base); 831 ps_printf(p, "/Info 1 0 R\n"); 832 ps_printf(p, ">>\n"); 833 ps_printf(p, "startxref\n"); 834 ps_printf(p, "%zu\n", xref); 835 ps_printf(p, "%%%%EOF\n"); 836 } 837 838 static void 839 ps_begin(struct termp *p) 840 { 841 int i; 842 843 /* 844 * Print margins into margin buffer. Nothing gets output to the 845 * screen yet, so we don't need to initialise the primary state. 846 */ 847 848 if (p->ps->psmarg) { 849 assert(p->ps->psmargsz); 850 p->ps->psmarg[0] = '\0'; 851 } 852 853 /*p->ps->pdfbytes = 0;*/ 854 p->ps->psmargcur = 0; 855 p->ps->flags = PS_MARGINS; 856 p->ps->pscol = p->ps->left; 857 p->ps->psrow = p->ps->header; 858 859 ps_setfont(p, TERMFONT_NONE); 860 861 (*p->headf)(p, p->argf); 862 (*p->endline)(p); 863 864 p->ps->pscol = p->ps->left; 865 p->ps->psrow = p->ps->footer; 866 867 (*p->footf)(p, p->argf); 868 (*p->endline)(p); 869 870 p->ps->flags &= ~PS_MARGINS; 871 872 assert(0 == p->ps->flags); 873 assert(p->ps->psmarg); 874 assert('\0' != p->ps->psmarg[0]); 875 876 /* 877 * Print header and initialise page state. Following this, 878 * stuff gets printed to the screen, so make sure we're sane. 879 */ 880 881 if (TERMTYPE_PS == p->type) { 882 ps_printf(p, "%%!PS-Adobe-3.0\n"); 883 ps_printf(p, "%%%%DocumentData: Clean7Bit\n"); 884 ps_printf(p, "%%%%Orientation: Portrait\n"); 885 ps_printf(p, "%%%%Pages: (atend)\n"); 886 ps_printf(p, "%%%%PageOrder: Ascend\n"); 887 ps_printf(p, "%%%%DocumentMedia: " 888 "Default %zu %zu 0 () ()\n", 889 (size_t)AFM2PNT(p, p->ps->width), 890 (size_t)AFM2PNT(p, p->ps->height)); 891 ps_printf(p, "%%%%DocumentNeededResources: font"); 892 893 for (i = 0; i < (int)TERMFONT__MAX; i++) 894 ps_printf(p, " %s", fonts[i].name); 895 896 ps_printf(p, "\n%%%%EndComments\n"); 897 } else { 898 ps_printf(p, "%%PDF-1.1\n"); 899 pdf_obj(p, 1); 900 ps_printf(p, "<<\n"); 901 ps_printf(p, ">>\n"); 902 ps_printf(p, "endobj\n"); 903 904 for (i = 0; i < (int)TERMFONT__MAX; i++) { 905 pdf_obj(p, (size_t)i + 3); 906 ps_printf(p, "<<\n"); 907 ps_printf(p, "/Type /Font\n"); 908 ps_printf(p, "/Subtype /Type1\n"); 909 ps_printf(p, "/Name /F%d\n", i); 910 ps_printf(p, "/BaseFont /%s\n", fonts[i].name); 911 ps_printf(p, ">>\n"); 912 } 913 } 914 915 p->ps->pdfbody = (size_t)TERMFONT__MAX + 3; 916 p->ps->pscol = p->ps->left; 917 p->ps->psrow = p->ps->top; 918 p->ps->flags |= PS_NEWPAGE; 919 ps_setfont(p, TERMFONT_NONE); 920 } 921 922 static void 923 ps_pletter(struct termp *p, int c) 924 { 925 int f; 926 927 /* 928 * If we haven't opened a page context, then output that we're 929 * in a new page and make sure the font is correctly set. 930 */ 931 932 if (PS_NEWPAGE & p->ps->flags) { 933 if (TERMTYPE_PS == p->type) { 934 ps_printf(p, "%%%%Page: %zu %zu\n", 935 p->ps->pages + 1, p->ps->pages + 1); 936 ps_printf(p, "/%s %zu selectfont\n", 937 fonts[(int)p->ps->lastf].name, 938 p->ps->scale); 939 } else { 940 pdf_obj(p, p->ps->pdfbody + 941 p->ps->pages * 4); 942 ps_printf(p, "<<\n"); 943 ps_printf(p, "/Length %zu 0 R\n", 944 p->ps->pdfbody + 1 + p->ps->pages * 4); 945 ps_printf(p, ">>\nstream\n"); 946 } 947 p->ps->pdflastpg = p->ps->pdfbytes; 948 p->ps->flags &= ~PS_NEWPAGE; 949 } 950 951 /* 952 * If we're not in a PostScript "word" context, then open one 953 * now at the current cursor. 954 */ 955 956 if ( ! (PS_INLINE & p->ps->flags)) { 957 if (TERMTYPE_PS != p->type) { 958 ps_printf(p, "BT\n/F%d %zu Tf\n", 959 (int)p->ps->lastf, p->ps->scale); 960 ps_printf(p, "%.3f %.3f Td\n(", 961 AFM2PNT(p, p->ps->pscol), 962 AFM2PNT(p, p->ps->psrow)); 963 } else 964 ps_printf(p, "%.3f %.3f moveto\n(", 965 AFM2PNT(p, p->ps->pscol), 966 AFM2PNT(p, p->ps->psrow)); 967 p->ps->flags |= PS_INLINE; 968 } 969 970 assert( ! (PS_NEWPAGE & p->ps->flags)); 971 972 /* 973 * We need to escape these characters as per the PostScript 974 * specification. We would also escape non-graphable characters 975 * (like tabs), but none of them would get to this point and 976 * it's superfluous to abort() on them. 977 */ 978 979 switch (c) { 980 case '(': 981 case ')': 982 case '\\': 983 ps_putchar(p, '\\'); 984 break; 985 default: 986 break; 987 } 988 989 /* Write the character and adjust where we are on the page. */ 990 991 f = (int)p->ps->lastf; 992 993 if (c <= 32 || c - 32 >= MAXCHAR) 994 c = 32; 995 996 ps_putchar(p, (char)c); 997 c -= 32; 998 p->ps->pscol += (size_t)fonts[f].gly[c].wx; 999 } 1000 1001 static void 1002 ps_pclose(struct termp *p) 1003 { 1004 1005 /* 1006 * Spit out that we're exiting a word context (this is a 1007 * "partial close" because we don't check the last-char buffer 1008 * or anything). 1009 */ 1010 1011 if ( ! (PS_INLINE & p->ps->flags)) 1012 return; 1013 1014 if (TERMTYPE_PS != p->type) { 1015 ps_printf(p, ") Tj\nET\n"); 1016 } else 1017 ps_printf(p, ") show\n"); 1018 1019 p->ps->flags &= ~PS_INLINE; 1020 } 1021 1022 static void 1023 ps_fclose(struct termp *p) 1024 { 1025 1026 /* 1027 * Strong closure: if we have a last-char, spit it out after 1028 * checking that we're in the right font mode. This will of 1029 * course open a new scope, if applicable. 1030 * 1031 * Following this, close out any scope that's open. 1032 */ 1033 1034 if (p->ps->last != '\0') { 1035 assert( ! (p->ps->flags & PS_BACKSP)); 1036 if (p->ps->nextf != p->ps->lastf) { 1037 ps_pclose(p); 1038 ps_setfont(p, p->ps->nextf); 1039 } 1040 p->ps->nextf = TERMFONT_NONE; 1041 ps_pletter(p, p->ps->last); 1042 p->ps->last = '\0'; 1043 } 1044 1045 if ( ! (PS_INLINE & p->ps->flags)) 1046 return; 1047 1048 ps_pclose(p); 1049 } 1050 1051 static void 1052 ps_letter(struct termp *p, int arg) 1053 { 1054 size_t savecol, wx; 1055 char c; 1056 1057 c = arg >= 128 || arg <= 0 ? '?' : arg; 1058 1059 /* 1060 * When receiving a backspace, merely flag it. 1061 * We don't know yet whether it is 1062 * a font instruction or an overstrike. 1063 */ 1064 1065 if (c == '\b') { 1066 assert(p->ps->last != '\0'); 1067 assert( ! (p->ps->flags & PS_BACKSP)); 1068 p->ps->flags |= PS_BACKSP; 1069 return; 1070 } 1071 1072 /* 1073 * Decode font instructions. 1074 */ 1075 1076 if (p->ps->flags & PS_BACKSP) { 1077 if (p->ps->last == '_') { 1078 switch (p->ps->nextf) { 1079 case TERMFONT_BI: 1080 break; 1081 case TERMFONT_BOLD: 1082 p->ps->nextf = TERMFONT_BI; 1083 break; 1084 default: 1085 p->ps->nextf = TERMFONT_UNDER; 1086 } 1087 p->ps->last = c; 1088 p->ps->flags &= ~PS_BACKSP; 1089 return; 1090 } 1091 if (p->ps->last == c) { 1092 switch (p->ps->nextf) { 1093 case TERMFONT_BI: 1094 break; 1095 case TERMFONT_UNDER: 1096 p->ps->nextf = TERMFONT_BI; 1097 break; 1098 default: 1099 p->ps->nextf = TERMFONT_BOLD; 1100 } 1101 p->ps->flags &= ~PS_BACKSP; 1102 return; 1103 } 1104 1105 /* 1106 * This is not a font instruction, but rather 1107 * the next character. Prepare for overstrike. 1108 */ 1109 1110 savecol = p->ps->pscol; 1111 } else 1112 savecol = SIZE_MAX; 1113 1114 /* 1115 * We found the next character, so the font instructions 1116 * for the previous one are complete. 1117 * Use them and print it. 1118 */ 1119 1120 if (p->ps->last != '\0') { 1121 if (p->ps->nextf != p->ps->lastf) { 1122 ps_pclose(p); 1123 ps_setfont(p, p->ps->nextf); 1124 } 1125 p->ps->nextf = TERMFONT_NONE; 1126 1127 /* 1128 * For an overstrike, if a previous character 1129 * was wider, advance to center the new one. 1130 */ 1131 1132 if (p->ps->pscolnext) { 1133 wx = fonts[p->ps->lastf].gly[(int)p->ps->last-32].wx; 1134 if (p->ps->pscol + wx < p->ps->pscolnext) 1135 p->ps->pscol = (p->ps->pscol + 1136 p->ps->pscolnext - wx) / 2; 1137 } 1138 1139 ps_pletter(p, p->ps->last); 1140 1141 /* 1142 * For an overstrike, if a previous character 1143 * was wider, advance to the end of the old one. 1144 */ 1145 1146 if (p->ps->pscol < p->ps->pscolnext) { 1147 ps_pclose(p); 1148 p->ps->pscol = p->ps->pscolnext; 1149 } 1150 } 1151 1152 /* 1153 * Do not print the current character yet because font 1154 * instructions might follow; only remember it. 1155 * For the first character, nothing else is done. 1156 * The final character will get printed from ps_fclose(). 1157 */ 1158 1159 p->ps->last = c; 1160 1161 /* 1162 * For an overstrike, back up to the previous position. 1163 * If the previous character is wider than any it overstrikes, 1164 * remember the current position, because it might also be 1165 * wider than all that will overstrike it. 1166 */ 1167 1168 if (savecol != SIZE_MAX) { 1169 if (p->ps->pscolnext < p->ps->pscol) 1170 p->ps->pscolnext = p->ps->pscol; 1171 ps_pclose(p); 1172 p->ps->pscol = savecol; 1173 p->ps->flags &= ~PS_BACKSP; 1174 } else 1175 p->ps->pscolnext = 0; 1176 } 1177 1178 static void 1179 ps_advance(struct termp *p, size_t len) 1180 { 1181 1182 /* 1183 * Advance some spaces. This can probably be made smarter, 1184 * i.e., to have multiple space-separated words in the same 1185 * scope, but this is easier: just close out the current scope 1186 * and readjust our column settings. 1187 */ 1188 1189 ps_fclose(p); 1190 p->ps->pscol += len; 1191 } 1192 1193 static void 1194 ps_endline(struct termp *p) 1195 { 1196 1197 /* Close out any scopes we have open: we're at eoln. */ 1198 1199 ps_fclose(p); 1200 1201 /* 1202 * If we're in the margin, don't try to recalculate our current 1203 * row. XXX: if the column tries to be fancy with multiple 1204 * lines, we'll do nasty stuff. 1205 */ 1206 1207 if (PS_MARGINS & p->ps->flags) 1208 return; 1209 1210 /* Left-justify. */ 1211 1212 p->ps->pscol = p->ps->left; 1213 1214 /* If we haven't printed anything, return. */ 1215 1216 if (PS_NEWPAGE & p->ps->flags) 1217 return; 1218 1219 /* 1220 * Put us down a line. If we're at the page bottom, spit out a 1221 * showpage and restart our row. 1222 */ 1223 1224 if (p->ps->psrow >= p->ps->lineheight + p->ps->bottom) { 1225 p->ps->psrow -= p->ps->lineheight; 1226 return; 1227 } 1228 1229 ps_closepage(p); 1230 } 1231 1232 static void 1233 ps_setfont(struct termp *p, enum termfont f) 1234 { 1235 1236 assert(f < TERMFONT__MAX); 1237 p->ps->lastf = f; 1238 1239 /* 1240 * If we're still at the top of the page, let the font-setting 1241 * be delayed until we actually have stuff to print. 1242 */ 1243 1244 if (PS_NEWPAGE & p->ps->flags) 1245 return; 1246 1247 if (TERMTYPE_PS == p->type) 1248 ps_printf(p, "/%s %zu selectfont\n", 1249 fonts[(int)f].name, p->ps->scale); 1250 else 1251 ps_printf(p, "/F%d %zu Tf\n", 1252 (int)f, p->ps->scale); 1253 } 1254 1255 static size_t 1256 ps_width(const struct termp *p, int c) 1257 { 1258 1259 if (c <= 32 || c - 32 >= MAXCHAR) 1260 c = 0; 1261 else 1262 c -= 32; 1263 1264 return (size_t)fonts[(int)TERMFONT_NONE].gly[c].wx; 1265 } 1266 1267 static int 1268 ps_hspan(const struct termp *p, const struct roffsu *su) 1269 { 1270 double r; 1271 1272 /* 1273 * All of these measurements are derived by converting from the 1274 * native measurement to AFM units. 1275 */ 1276 switch (su->unit) { 1277 case SCALE_BU: 1278 /* 1279 * Traditionally, the default unit is fixed to the 1280 * output media. So this would refer to the point. In 1281 * mandoc(1), however, we stick to the default terminal 1282 * scaling unit so that output is the same regardless 1283 * the media. 1284 */ 1285 r = PNT2AFM(p, su->scale * 72.0 / 240.0); 1286 break; 1287 case SCALE_CM: 1288 r = PNT2AFM(p, su->scale * 72.0 / 2.54); 1289 break; 1290 case SCALE_EM: 1291 r = su->scale * 1292 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx; 1293 break; 1294 case SCALE_EN: 1295 r = su->scale * 1296 fonts[(int)TERMFONT_NONE].gly[110 - 32].wx; 1297 break; 1298 case SCALE_IN: 1299 r = PNT2AFM(p, su->scale * 72.0); 1300 break; 1301 case SCALE_MM: 1302 r = su->scale * 1303 fonts[(int)TERMFONT_NONE].gly[109 - 32].wx / 100.0; 1304 break; 1305 case SCALE_PC: 1306 r = PNT2AFM(p, su->scale * 12.0); 1307 break; 1308 case SCALE_PT: 1309 r = PNT2AFM(p, su->scale * 1.0); 1310 break; 1311 case SCALE_VS: 1312 r = su->scale * p->ps->lineheight; 1313 break; 1314 default: 1315 r = su->scale; 1316 break; 1317 } 1318 1319 return r * 24.0; 1320 } 1321 1322 static void 1323 ps_growbuf(struct termp *p, size_t sz) 1324 { 1325 if (p->ps->psmargcur + sz <= p->ps->psmargsz) 1326 return; 1327 1328 if (sz < PS_BUFSLOP) 1329 sz = PS_BUFSLOP; 1330 1331 p->ps->psmargsz += sz; 1332 p->ps->psmarg = mandoc_realloc(p->ps->psmarg, p->ps->psmargsz); 1333 } 1334