1 /*      $Id: term_ps.c,v 1.54 2011/10/16 12:20:34 schwarze Exp $ */
   2 /*
   3  * Copyright (c) 2010, 2011 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/types.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 "mandoc.h"
  33 #include "out.h"
  34 #include "main.h"
  35 #include "term.h"
  36 
  37 /* These work the buffer used by the header and footer. */
  38 #define PS_BUFSLOP        128
  39 
  40 /* Convert PostScript point "x" to an AFM unit. */
  41 #define PNT2AFM(p, x) /* LINTED */ \
  42         (size_t)((double)(x) * (1000.0 / (double)(p)->ps->scale))
  43 
  44 /* Convert an AFM unit "x" to a PostScript points */
  45 #define AFM2PNT(p, x) /* LINTED */ \
  46         ((double)(x) / (1000.0 / (double)(p)->ps->scale))
  47 
  48 struct  glyph {
  49         unsigned short    wx; /* WX in AFM */
  50 };
  51 
  52 struct  font {
  53         const char       *name; /* FontName in AFM */
  54 #define MAXCHAR           95 /* total characters we can handle */
  55         struct glyph      gly[MAXCHAR]; /* glyph metrics */
  56 };
  57 
  58 struct  termp_ps {
  59         int               flags;
  60 #define PS_INLINE        (1 << 0) /* we're in a word */
  61 #define PS_MARGINS       (1 << 1) /* we're in the margins */
  62 #define PS_NEWPAGE       (1 << 2) /* new page, no words yet */
  63         size_t            pscol;        /* visible column (AFM units) */
  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;         /* character buffer */
  69         enum termfont     lastf;        /* last set font */
  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            left;         /* body left (AFM units) */
  78         size_t            header;       /* header pos (AFM units) */
  79         size_t            footer;       /* footer pos (AFM units) */
  80         size_t            pdfbytes;     /* current output byte */
  81         size_t            pdflastpg;    /* byte of last page mark */
  82         size_t            pdfbody;      /* start of body object */
  83         size_t           *pdfobjs;      /* table of object offsets */
  84         size_t            pdfobjsz;     /* size of pdfobjs */
  85 };
  86 
  87 static  double            ps_hspan(const struct termp *,
  88                                 const struct roffsu *);
  89 static  size_t            ps_width(const struct termp *, int);
  90 static  void              ps_advance(struct termp *, size_t);
  91 static  void              ps_begin(struct termp *);
  92 static  void              ps_closepage(struct termp *);
  93 static  void              ps_end(struct termp *);
  94 static  void              ps_endline(struct termp *);
  95 static  void              ps_fclose(struct termp *);
  96 static  void              ps_growbuf(struct termp *, size_t);
  97 static  void              ps_letter(struct termp *, int);
  98 static  void              ps_pclose(struct termp *);
  99 static  void              ps_pletter(struct termp *, int);
 100 static  void              ps_printf(struct termp *, const char *, ...);
 101 static  void              ps_putchar(struct termp *, char);
 102 static  void              ps_setfont(struct termp *, enum termfont);
 103 static  struct termp     *pspdf_alloc(char *);
 104 static  void              pdf_obj(struct termp *, size_t);
 105 
 106 /*
 107  * We define, for the time being, three fonts: bold, oblique/italic, and
 108  * normal (roman).  The following table hard-codes the font metrics for
 109  * ASCII, i.e., 32--127.
 110  */
 111 
 112 static  const struct font fonts[TERMFONT__MAX] = {
 113         { "Times-Roman", {
 114                 { 250 },
 115                 { 333 },
 116                 { 408 },
 117                 { 500 },
 118                 { 500 },
 119                 { 833 },
 120                 { 778 },
 121                 { 333 },
 122                 { 333 },
 123                 { 333 },
 124                 { 500 },
 125                 { 564 },
 126                 { 250 },
 127                 { 333 },
 128                 { 250 },
 129                 { 278 },
 130                 { 500 },
 131                 { 500 },
 132                 { 500 },
 133                 { 500 },
 134                 { 500 },
 135                 { 500 },
 136                 { 500 },
 137                 { 500 },
 138                 { 500 },
 139                 { 500 },
 140                 { 278 },
 141                 { 278 },
 142                 { 564 },
 143                 { 564 },
 144                 { 564 },
 145                 { 444 },
 146                 { 921 },
 147                 { 722 },
 148                 { 667 },
 149                 { 667 },
 150                 { 722 },
 151                 { 611 },
 152                 { 556 },
 153                 { 722 },
 154                 { 722 },
 155                 { 333 },
 156                 { 389 },
 157                 { 722 },
 158                 { 611 },
 159                 { 889 },
 160                 { 722 },
 161                 { 722 },
 162                 { 556 },
 163                 { 722 },
 164                 { 667 },
 165                 { 556 },
 166                 { 611 },
 167                 { 722 },
 168                 { 722 },
 169                 { 944 },
 170                 { 722 },
 171                 { 722 },
 172                 { 611 },
 173                 { 333 },
 174                 { 278 },
 175                 { 333 },
 176                 { 469 },
 177                 { 500 },
 178                 { 333 },
 179                 { 444 },
 180                 { 500 },
 181                 { 444 },
 182                 {  500},
 183                 {  444},
 184                 {  333},
 185                 {  500},
 186                 {  500},
 187                 {  278},
 188                 {  278},
 189                 {  500},
 190                 {  278},
 191                 {  778},
 192                 {  500},
 193                 {  500},
 194                 {  500},
 195                 {  500},
 196                 {  333},
 197                 {  389},
 198                 {  278},
 199                 {  500},
 200                 {  500},
 201                 {  722},
 202                 {  500},
 203                 {  500},
 204                 {  444},
 205                 {  480},
 206                 {  200},
 207                 {  480},
 208                 {  541},
 209         } },
 210         { "Times-Bold", {
 211                 { 250  },
 212                 { 333  },
 213                 { 555  },
 214                 { 500  },
 215                 { 500  },
 216                 { 1000 },
 217                 { 833  },
 218                 { 333  },
 219                 { 333  },
 220                 { 333  },
 221                 { 500  },
 222                 { 570  },
 223                 { 250  },
 224                 { 333  },
 225                 { 250  },
 226                 { 278  },
 227                 { 500  },
 228                 { 500  },
 229                 { 500  },
 230                 { 500  },
 231                 { 500  },
 232                 { 500  },
 233                 { 500  },
 234                 { 500  },
 235                 { 500  },
 236                 { 500  },
 237                 { 333  },
 238                 { 333  },
 239                 { 570  },
 240                 { 570  },
 241                 { 570  },
 242                 { 500  },
 243                 { 930  },
 244                 { 722  },
 245                 { 667  },
 246                 { 722  },
 247                 { 722  },
 248                 { 667  },
 249                 { 611  },
 250                 { 778  },
 251                 { 778  },
 252                 { 389  },
 253                 { 500  },
 254                 { 778  },
 255                 { 667  },
 256                 { 944  },
 257                 { 722  },
 258                 { 778  },
 259                 { 611  },
 260                 { 778  },
 261                 { 722  },
 262                 { 556  },
 263                 { 667  },
 264                 { 722  },
 265                 { 722  },
 266                 { 1000 },
 267                 { 722  },
 268                 { 722  },
 269                 { 667  },
 270                 { 333  },
 271                 { 278  },
 272                 { 333  },
 273                 { 581  },
 274                 { 500  },
 275                 { 333  },
 276                 { 500  },
 277                 { 556  },
 278                 { 444  },
 279                 {  556 },
 280                 {  444 },
 281                 {  333 },
 282                 {  500 },
 283                 {  556 },
 284                 {  278 },
 285                 {  333 },
 286                 {  556 },
 287                 {  278 },
 288                 {  833 },
 289                 {  556 },
 290                 {  500 },
 291                 {  556 },
 292                 {  556 },
 293                 {  444 },
 294                 {  389 },
 295                 {  333 },
 296                 {  556 },
 297                 {  500 },
 298                 {  722 },
 299                 {  500 },
 300                 {  500 },
 301                 {  444 },
 302                 {  394 },
 303                 {  220 },
 304                 {  394 },
 305                 {  520 },
 306         } },
 307         { "Times-Italic", {
 308                 { 250  },
 309                 { 333  },
 310                 { 420  },
 311                 { 500  },
 312                 { 500  },
 313                 { 833  },
 314                 { 778  },
 315                 { 333  },
 316                 { 333  },
 317                 { 333  },
 318                 { 500  },
 319                 { 675  },
 320                 { 250  },
 321                 { 333  },
 322                 { 250  },
 323                 { 278  },
 324                 { 500  },
 325                 { 500  },
 326                 { 500  },
 327                 { 500  },
 328                 { 500  },
 329                 { 500  },
 330                 { 500  },
 331                 { 500  },
 332                 { 500  },
 333                 { 500  },
 334                 { 333  },
 335                 { 333  },
 336                 { 675  },
 337                 { 675  },
 338                 { 675  },
 339                 { 500  },
 340                 { 920  },
 341                 { 611  },
 342                 { 611  },
 343                 { 667  },
 344                 { 722  },
 345                 { 611  },
 346                 { 611  },
 347                 { 722  },
 348                 { 722  },
 349                 { 333  },
 350                 { 444  },
 351                 { 667  },
 352                 { 556  },
 353                 { 833  },
 354                 { 667  },
 355                 { 722  },
 356                 { 611  },
 357                 { 722  },
 358                 { 611  },
 359                 { 500  },
 360                 { 556  },
 361                 { 722  },
 362                 { 611  },
 363                 { 833  },
 364                 { 611  },
 365                 { 556  },
 366                 { 556  },
 367                 { 389  },
 368                 { 278  },
 369                 { 389  },
 370                 { 422  },
 371                 { 500  },
 372                 { 333  },
 373                 { 500  },
 374                 { 500  },
 375                 { 444  },
 376                 {  500 },
 377                 {  444 },
 378                 {  278 },
 379                 {  500 },
 380                 {  500 },
 381                 {  278 },
 382                 {  278 },
 383                 {  444 },
 384                 {  278 },
 385                 {  722 },
 386                 {  500 },
 387                 {  500 },
 388                 {  500 },
 389                 {  500 },
 390                 {  389 },
 391                 {  389 },
 392                 {  278 },
 393                 {  500 },
 394                 {  444 },
 395                 {  667 },
 396                 {  444 },
 397                 {  444 },
 398                 {  389 },
 399                 {  400 },
 400                 {  275 },
 401                 {  400 },
 402                 {  541 },
 403         } },
 404 };
 405 
 406 void *
 407 pdf_alloc(char *outopts)
 408 {
 409         struct termp    *p;
 410 
 411         if (NULL != (p = pspdf_alloc(outopts)))
 412                 p->type = TERMTYPE_PDF;
 413 
 414         return(p);
 415 }
 416 
 417 void *
 418 ps_alloc(char *outopts)
 419 {
 420         struct termp    *p;
 421 
 422         if (NULL != (p = pspdf_alloc(outopts)))
 423                 p->type = TERMTYPE_PS;
 424 
 425         return(p);
 426 }
 427 
 428 static struct termp *
 429 pspdf_alloc(char *outopts)
 430 {
 431         struct termp    *p;
 432         unsigned int     pagex, pagey;
 433         size_t           marginx, marginy, lineheight;
 434         const char      *toks[2];
 435         const char      *pp;
 436         char            *v;
 437 
 438         p = mandoc_calloc(1, sizeof(struct termp));
 439         p->enc = TERMENC_ASCII;
 440         p->ps = mandoc_calloc(1, sizeof(struct termp_ps));
 441 
 442         p->advance = ps_advance;
 443         p->begin = ps_begin;
 444         p->end = ps_end;
 445         p->endline = ps_endline;
 446         p->hspan = ps_hspan;
 447         p->letter = ps_letter;
 448         p->width = ps_width;
 449         
 450         toks[0] = "paper";
 451         toks[1] = NULL;
 452 
 453         pp = NULL;
 454 
 455         while (outopts && *outopts)
 456                 switch (getsubopt(&outopts, UNCONST(toks), &v)) {
 457                 case (0):
 458                         pp = v;
 459                         break;
 460                 default:
 461                         break;
 462                 }
 463 
 464         /* Default to US letter (millimetres). */
 465 
 466         pagex = 216;
 467         pagey = 279;
 468 
 469         /*
 470          * The ISO-269 paper sizes can be calculated automatically, but
 471          * it would require bringing in -lm for pow() and I'd rather not
 472          * do that.  So just do it the easy way for now.  Since this
 473          * only happens once, I'm not terribly concerned.
 474          */
 475 
 476         if (pp && strcasecmp(pp, "letter")) {
 477                 if (0 == strcasecmp(pp, "a3")) {
 478                         pagex = 297;
 479                         pagey = 420;
 480                 } else if (0 == strcasecmp(pp, "a4")) {
 481                         pagex = 210;
 482                         pagey = 297;
 483                 } else if (0 == strcasecmp(pp, "a5")) {
 484                         pagex = 148;
 485                         pagey = 210;
 486                 } else if (0 == strcasecmp(pp, "legal")) {
 487                         pagex = 216;
 488                         pagey = 356;
 489                 } else if (2 != sscanf(pp, "%ux%u", &pagex, &pagey))
 490                         fprintf(stderr, "%s: Unknown paper\n", pp);
 491         }
 492 
 493         /* 
 494          * This MUST be defined before any PNT2AFM or AFM2PNT
 495          * calculations occur.
 496          */
 497 
 498         p->ps->scale = 11;
 499 
 500         /* Remember millimetres -> AFM units. */
 501 
 502         pagex = PNT2AFM(p, ((double)pagex * 2.834));
 503         pagey = PNT2AFM(p, ((double)pagey * 2.834));
 504 
 505         /* Margins are 1/9 the page x and y. */
 506 
 507         marginx = /* LINTED */
 508                 (size_t)((double)pagex / 9.0);
 509         marginy = /* LINTED */
 510                 (size_t)((double)pagey / 9.0);
 511 
 512         /* Line-height is 1.4em. */
 513 
 514         lineheight = PNT2AFM(p, ((double)p->ps->scale * 1.4));
 515 
 516         p->ps->width = (size_t)pagex;
 517         p->ps->height = (size_t)pagey;
 518         p->ps->header = pagey - (marginy / 2) - (lineheight / 2);
 519         p->ps->top = pagey - marginy;
 520         p->ps->footer = (marginy / 2) - (lineheight / 2);
 521         p->ps->bottom = marginy;
 522         p->ps->left = marginx;
 523         p->ps->lineheight = lineheight;
 524 
 525         p->defrmargin = pagex - (marginx * 2);
 526         return(p);
 527 }
 528 
 529 
 530 void
 531 pspdf_free(void *arg)
 532 {
 533         struct termp    *p;
 534 
 535         p = (struct termp *)arg;
 536 
 537         if (p->ps->psmarg)
 538                 free(p->ps->psmarg);
 539         if (p->ps->pdfobjs)
 540                 free(p->ps->pdfobjs);
 541 
 542         free(p->ps);
 543         term_free(p);
 544 }
 545 
 546 
 547 static void
 548 ps_printf(struct termp *p, const char *fmt, ...)
 549 {
 550         va_list          ap;
 551         int              pos, len;
 552 
 553         va_start(ap, fmt);
 554 
 555         /*
 556          * If we're running in regular mode, then pipe directly into
 557          * vprintf().  If we're processing margins, then push the data
 558          * into our growable margin buffer.
 559          */
 560 
 561         if ( ! (PS_MARGINS & p->ps->flags)) {
 562                 len = vprintf(fmt, ap);
 563                 va_end(ap);
 564                 p->ps->pdfbytes += /* LINTED */
 565                         len < 0 ? 0 : (size_t)len;
 566                 return;
 567         }
 568 
 569         /* 
 570          * XXX: I assume that the in-margin print won't exceed
 571          * PS_BUFSLOP (128 bytes), which is reasonable but still an
 572          * assumption that will cause pukeage if it's not the case.
 573          */
 574 
 575         ps_growbuf(p, PS_BUFSLOP);
 576 
 577         pos = (int)p->ps->psmargcur;
 578         vsnprintf(&p->ps->psmarg[pos], PS_BUFSLOP, fmt, ap);
 579 
 580         va_end(ap);
 581 
 582         p->ps->psmargcur = strlen(p->ps->psmarg);
 583 }
 584 
 585 
 586 static void
 587 ps_putchar(struct termp *p, char c)
 588 {
 589         int              pos;
 590 
 591         /* See ps_printf(). */
 592 
 593         if ( ! (PS_MARGINS & p->ps->flags)) {
 594                 /* LINTED */
 595                 putchar(c);
 596                 p->ps->pdfbytes++;
 597                 return;
 598         }
 599 
 600         ps_growbuf(p, 2);
 601 
 602         pos = (int)p->ps->psmargcur++;
 603         p->ps->psmarg[pos++] = c;
 604         p->ps->psmarg[pos] = '\0';
 605 }
 606 
 607 
 608 static void
 609 pdf_obj(struct termp *p, size_t obj)
 610 {
 611 
 612         assert(obj > 0);
 613 
 614         if ((obj - 1) >= p->ps->pdfobjsz) {
 615                 p->ps->pdfobjsz = obj + 128;
 616                 p->ps->pdfobjs = realloc
 617                         (p->ps->pdfobjs, 
 618                          p->ps->pdfobjsz * sizeof(size_t));
 619                 if (NULL == p->ps->pdfobjs) {
 620                         perror(NULL);
 621                         exit((int)MANDOCLEVEL_SYSERR);
 622                 }
 623         }
 624 
 625         p->ps->pdfobjs[(int)obj - 1] = p->ps->pdfbytes;
 626         ps_printf(p, "%zu 0 obj\n", obj);
 627 }
 628 
 629 
 630 static void
 631 ps_closepage(struct termp *p)
 632 {
 633         int              i;
 634         size_t           len, base;
 635 
 636         /*
 637          * Close out a page that we've already flushed to output.  In
 638          * PostScript, we simply note that the page must be showed.  In
 639          * PDF, we must now create the Length, Resource, and Page node
 640          * for the page contents.
 641          */
 642 
 643         assert(p->ps->psmarg && p->ps->psmarg[0]);
 644         ps_printf(p, "%s", p->ps->psmarg);
 645 
 646         if (TERMTYPE_PS != p->type) {
 647                 ps_printf(p, "ET\n");
 648 
 649                 len = p->ps->pdfbytes - p->ps->pdflastpg;
 650                 base = p->ps->pages * 4 + p->ps->pdfbody;
 651 
 652                 ps_printf(p, "endstream\nendobj\n");
 653 
 654                 /* Length of content. */
 655                 pdf_obj(p, base + 1);
 656                 ps_printf(p, "%zu\nendobj\n", len);
 657 
 658                 /* Resource for content. */
 659                 pdf_obj(p, base + 2);
 660                 ps_printf(p, "<<\n/ProcSet [/PDF /Text]\n");
 661                 ps_printf(p, "/Font <<\n");
 662                 for (i = 0; i < (int)TERMFONT__MAX; i++) 
 663                         ps_printf(p, "/F%d %d 0 R\n", i, 3 + i);
 664                 ps_printf(p, ">>\n>>\n");
 665 
 666                 /* Page node. */
 667                 pdf_obj(p, base + 3);
 668                 ps_printf(p, "<<\n");
 669                 ps_printf(p, "/Type /Page\n");
 670                 ps_printf(p, "/Parent 2 0 R\n");
 671                 ps_printf(p, "/Resources %zu 0 R\n", base + 2);
 672                 ps_printf(p, "/Contents %zu 0 R\n", base);
 673                 ps_printf(p, ">>\nendobj\n");
 674         } else
 675                 ps_printf(p, "showpage\n");
 676 
 677         p->ps->pages++;
 678         p->ps->psrow = p->ps->top;
 679         assert( ! (PS_NEWPAGE & p->ps->flags));
 680         p->ps->flags |= PS_NEWPAGE;
 681 }
 682 
 683 
 684 /* ARGSUSED */
 685 static void
 686 ps_end(struct termp *p)
 687 {
 688         size_t           i, xref, base;
 689 
 690         /*
 691          * At the end of the file, do one last showpage.  This is the
 692          * same behaviour as groff(1) and works for multiple pages as
 693          * well as just one.
 694          */
 695 
 696         if ( ! (PS_NEWPAGE & p->ps->flags)) {
 697                 assert(0 == p->ps->flags);
 698                 assert('\0' == p->ps->last);
 699                 ps_closepage(p);
 700         }
 701 
 702         if (TERMTYPE_PS == p->type) {
 703                 ps_printf(p, "%%%%Trailer\n");
 704                 ps_printf(p, "%%%%Pages: %zu\n", p->ps->pages);
 705                 ps_printf(p, "%%%%EOF\n");
 706                 return;
 707         } 
 708 
 709         pdf_obj(p, 2);
 710         ps_printf(p, "<<\n/Type /Pages\n");
 711         ps_printf(p, "/MediaBox [0 0 %zu %zu]\n",
 712                         (size_t)AFM2PNT(p, p->ps->width),
 713                         (size_t)AFM2PNT(p, p->ps->height));
 714 
 715         ps_printf(p, "/Count %zu\n", p->ps->pages);
 716         ps_printf(p, "/Kids [");
 717 
 718         for (i = 0; i < p->ps->pages; i++)
 719                 ps_printf(p, " %zu 0 R", i * 4 +
 720                                 p->ps->pdfbody + 3);
 721 
 722         base = (p->ps->pages - 1) * 4 + 
 723                 p->ps->pdfbody + 4;
 724 
 725         ps_printf(p, "]\n>>\nendobj\n");
 726         pdf_obj(p, base);
 727         ps_printf(p, "<<\n");
 728         ps_printf(p, "/Type /Catalog\n");
 729         ps_printf(p, "/Pages 2 0 R\n");
 730         ps_printf(p, ">>\n");
 731         xref = p->ps->pdfbytes;
 732         ps_printf(p, "xref\n");
 733         ps_printf(p, "0 %zu\n", base + 1);
 734         ps_printf(p, "0000000000 65535 f \n");
 735 
 736         for (i = 0; i < base; i++)
 737                 ps_printf(p, "%.10zu 00000 n \n", 
 738                                 p->ps->pdfobjs[(int)i]);
 739 
 740         ps_printf(p, "trailer\n");
 741         ps_printf(p, "<<\n");
 742         ps_printf(p, "/Size %zu\n", base + 1);
 743         ps_printf(p, "/Root %zu 0 R\n", base);
 744         ps_printf(p, "/Info 1 0 R\n");
 745         ps_printf(p, ">>\n");
 746         ps_printf(p, "startxref\n");
 747         ps_printf(p, "%zu\n", xref);
 748         ps_printf(p, "%%%%EOF\n");
 749 }
 750 
 751 
 752 static void
 753 ps_begin(struct termp *p)
 754 {
 755         time_t           t;
 756         int              i;
 757 
 758         /* 
 759          * Print margins into margin buffer.  Nothing gets output to the
 760          * screen yet, so we don't need to initialise the primary state.
 761          */
 762 
 763         if (p->ps->psmarg) {
 764                 assert(p->ps->psmargsz);
 765                 p->ps->psmarg[0] = '\0';
 766         }
 767 
 768         /*p->ps->pdfbytes = 0;*/
 769         p->ps->psmargcur = 0;
 770         p->ps->flags = PS_MARGINS;
 771         p->ps->pscol = p->ps->left;
 772         p->ps->psrow = p->ps->header;
 773 
 774         ps_setfont(p, TERMFONT_NONE);
 775 
 776         (*p->headf)(p, p->argf);
 777         (*p->endline)(p);
 778 
 779         p->ps->pscol = p->ps->left;
 780         p->ps->psrow = p->ps->footer;
 781 
 782         (*p->footf)(p, p->argf);
 783         (*p->endline)(p);
 784 
 785         p->ps->flags &= ~PS_MARGINS;
 786 
 787         assert(0 == p->ps->flags);
 788         assert(p->ps->psmarg);
 789         assert('\0' != p->ps->psmarg[0]);
 790 
 791         /* 
 792          * Print header and initialise page state.  Following this,
 793          * stuff gets printed to the screen, so make sure we're sane.
 794          */
 795 
 796         t = time(NULL);
 797 
 798         if (TERMTYPE_PS == p->type) {
 799                 ps_printf(p, "%%!PS-Adobe-3.0\n");
 800                 ps_printf(p, "%%%%CreationDate: %s", ctime(&t));
 801                 ps_printf(p, "%%%%DocumentData: Clean7Bit\n");
 802                 ps_printf(p, "%%%%Orientation: Portrait\n");
 803                 ps_printf(p, "%%%%Pages: (atend)\n");
 804                 ps_printf(p, "%%%%PageOrder: Ascend\n");
 805                 ps_printf(p, "%%%%DocumentMedia: "
 806                                 "Default %zu %zu 0 () ()\n",
 807                                 (size_t)AFM2PNT(p, p->ps->width),
 808                                 (size_t)AFM2PNT(p, p->ps->height));
 809                 ps_printf(p, "%%%%DocumentNeededResources: font");
 810 
 811                 for (i = 0; i < (int)TERMFONT__MAX; i++)
 812                         ps_printf(p, " %s", fonts[i].name);
 813 
 814                 ps_printf(p, "\n%%%%EndComments\n");
 815         } else {
 816                 ps_printf(p, "%%PDF-1.1\n");
 817                 pdf_obj(p, 1);
 818                 ps_printf(p, "<<\n");
 819                 ps_printf(p, ">>\n");
 820                 ps_printf(p, "endobj\n");
 821 
 822                 for (i = 0; i < (int)TERMFONT__MAX; i++) {
 823                         pdf_obj(p, (size_t)i + 3);
 824                         ps_printf(p, "<<\n");
 825                         ps_printf(p, "/Type /Font\n");
 826                         ps_printf(p, "/Subtype /Type1\n");
 827                         ps_printf(p, "/Name /F%zu\n", i);
 828                         ps_printf(p, "/BaseFont /%s\n", fonts[i].name);
 829                         ps_printf(p, ">>\n");
 830                 }
 831         }
 832 
 833         p->ps->pdfbody = (size_t)TERMFONT__MAX + 3;
 834         p->ps->pscol = p->ps->left;
 835         p->ps->psrow = p->ps->top;
 836         p->ps->flags |= PS_NEWPAGE;
 837         ps_setfont(p, TERMFONT_NONE);
 838 }
 839 
 840 
 841 static void
 842 ps_pletter(struct termp *p, int c)
 843 {
 844         int              f;
 845 
 846         /*
 847          * If we haven't opened a page context, then output that we're
 848          * in a new page and make sure the font is correctly set.
 849          */
 850 
 851         if (PS_NEWPAGE & p->ps->flags) {
 852                 if (TERMTYPE_PS == p->type) {
 853                         ps_printf(p, "%%%%Page: %zu %zu\n", 
 854                                         p->ps->pages + 1, 
 855                                         p->ps->pages + 1);
 856                         ps_printf(p, "/%s %zu selectfont\n", 
 857                                         fonts[(int)p->ps->lastf].name, 
 858                                         p->ps->scale);
 859                 } else {
 860                         pdf_obj(p, p->ps->pdfbody + 
 861                                         p->ps->pages * 4);
 862                         ps_printf(p, "<<\n");
 863                         ps_printf(p, "/Length %zu 0 R\n", 
 864                                         p->ps->pdfbody + 1 +
 865                                         p->ps->pages * 4);
 866                         ps_printf(p, ">>\nstream\n");
 867                 }
 868                 p->ps->pdflastpg = p->ps->pdfbytes;
 869                 p->ps->flags &= ~PS_NEWPAGE;
 870         }
 871         
 872         /*
 873          * If we're not in a PostScript "word" context, then open one
 874          * now at the current cursor.
 875          */
 876 
 877         if ( ! (PS_INLINE & p->ps->flags)) {
 878                 if (TERMTYPE_PS != p->type) {
 879                         ps_printf(p, "BT\n/F%d %zu Tf\n", 
 880                                         (int)p->ps->lastf,
 881                                         p->ps->scale);
 882                         ps_printf(p, "%.3f %.3f Td\n(",
 883                                         AFM2PNT(p, p->ps->pscol),
 884                                         AFM2PNT(p, p->ps->psrow));
 885                 } else
 886                         ps_printf(p, "%.3f %.3f moveto\n(", 
 887                                         AFM2PNT(p, p->ps->pscol),
 888                                         AFM2PNT(p, p->ps->psrow));
 889                 p->ps->flags |= PS_INLINE;
 890         }
 891 
 892         assert( ! (PS_NEWPAGE & p->ps->flags));
 893 
 894         /*
 895          * We need to escape these characters as per the PostScript
 896          * specification.  We would also escape non-graphable characters
 897          * (like tabs), but none of them would get to this point and
 898          * it's superfluous to abort() on them.
 899          */
 900 
 901         switch (c) {
 902         case ('('):
 903                 /* FALLTHROUGH */
 904         case (')'):
 905                 /* FALLTHROUGH */
 906         case ('\\'):
 907                 ps_putchar(p, '\\');
 908                 break;
 909         default:
 910                 break;
 911         }
 912 
 913         /* Write the character and adjust where we are on the page. */
 914 
 915         f = (int)p->ps->lastf;
 916 
 917         if (c <= 32 || (c - 32 >= MAXCHAR)) {
 918                 ps_putchar(p, ' ');
 919                 p->ps->pscol += (size_t)fonts[f].gly[0].wx;
 920                 return;
 921         } 
 922 
 923         ps_putchar(p, (char)c);
 924         c -= 32;
 925         p->ps->pscol += (size_t)fonts[f].gly[c].wx;
 926 }
 927 
 928 
 929 static void
 930 ps_pclose(struct termp *p)
 931 {
 932 
 933         /* 
 934          * Spit out that we're exiting a word context (this is a
 935          * "partial close" because we don't check the last-char buffer
 936          * or anything).
 937          */
 938 
 939         if ( ! (PS_INLINE & p->ps->flags))
 940                 return;
 941         
 942         if (TERMTYPE_PS != p->type) {
 943                 ps_printf(p, ") Tj\nET\n");
 944         } else
 945                 ps_printf(p, ") show\n");
 946 
 947         p->ps->flags &= ~PS_INLINE;
 948 }
 949 
 950 
 951 static void
 952 ps_fclose(struct termp *p)
 953 {
 954 
 955         /*
 956          * Strong closure: if we have a last-char, spit it out after
 957          * checking that we're in the right font mode.  This will of
 958          * course open a new scope, if applicable.
 959          *
 960          * Following this, close out any scope that's open.
 961          */
 962 
 963         if ('\0' != p->ps->last) {
 964                 if (p->ps->lastf != TERMFONT_NONE) {
 965                         ps_pclose(p);
 966                         ps_setfont(p, TERMFONT_NONE);
 967                 }
 968                 ps_pletter(p, p->ps->last);
 969                 p->ps->last = '\0';
 970         }
 971 
 972         if ( ! (PS_INLINE & p->ps->flags))
 973                 return;
 974 
 975         ps_pclose(p);
 976 }
 977 
 978 
 979 static void
 980 ps_letter(struct termp *p, int arg)
 981 {
 982         char            cc, c;
 983 
 984         /* LINTED */
 985         c = arg >= 128 || arg <= 0 ? '?' : arg;
 986 
 987         /*
 988          * State machine dictates whether to buffer the last character
 989          * or not.  Basically, encoded words are detected by checking if
 990          * we're an "8" and switching on the buffer.  Then we put "8" in
 991          * our buffer, and on the next charater, flush both character
 992          * and buffer.  Thus, "regular" words are detected by having a
 993          * regular character and a regular buffer character.
 994          */
 995 
 996         if ('\0' == p->ps->last) {
 997                 assert(8 != c);
 998                 p->ps->last = c;
 999                 return;
1000         } else if (8 == p->ps->last) {
1001                 assert(8 != c);
1002                 p->ps->last = '\0';
1003         } else if (8 == c) {
1004                 assert(8 != p->ps->last);
1005                 if ('_' == p->ps->last) {
1006                         if (p->ps->lastf != TERMFONT_UNDER) {
1007                                 ps_pclose(p);
1008                                 ps_setfont(p, TERMFONT_UNDER);
1009                         }
1010                 } else if (p->ps->lastf != TERMFONT_BOLD) {
1011                         ps_pclose(p);
1012                         ps_setfont(p, TERMFONT_BOLD);
1013                 }
1014                 p->ps->last = c;
1015                 return;
1016         } else {
1017                 if (p->ps->lastf != TERMFONT_NONE) {
1018                         ps_pclose(p);
1019                         ps_setfont(p, TERMFONT_NONE);
1020                 }
1021                 cc = p->ps->last;
1022                 p->ps->last = c;
1023                 c = cc;
1024         }
1025 
1026         ps_pletter(p, c);
1027 }
1028 
1029 
1030 static void
1031 ps_advance(struct termp *p, size_t len)
1032 {
1033 
1034         /*
1035          * Advance some spaces.  This can probably be made smarter,
1036          * i.e., to have multiple space-separated words in the same
1037          * scope, but this is easier:  just close out the current scope
1038          * and readjust our column settings.
1039          */
1040 
1041         ps_fclose(p);
1042         p->ps->pscol += len;
1043 }
1044 
1045 
1046 static void
1047 ps_endline(struct termp *p)
1048 {
1049 
1050         /* Close out any scopes we have open: we're at eoln. */
1051 
1052         ps_fclose(p);
1053 
1054         /*
1055          * If we're in the margin, don't try to recalculate our current
1056          * row.  XXX: if the column tries to be fancy with multiple
1057          * lines, we'll do nasty stuff. 
1058          */
1059 
1060         if (PS_MARGINS & p->ps->flags)
1061                 return;
1062 
1063         /* Left-justify. */
1064 
1065         p->ps->pscol = p->ps->left;
1066 
1067         /* If we haven't printed anything, return. */
1068 
1069         if (PS_NEWPAGE & p->ps->flags)
1070                 return;
1071 
1072         /*
1073          * Put us down a line.  If we're at the page bottom, spit out a
1074          * showpage and restart our row.
1075          */
1076 
1077         if (p->ps->psrow >= p->ps->lineheight + 
1078                         p->ps->bottom) {
1079                 p->ps->psrow -= p->ps->lineheight;
1080                 return;
1081         }
1082 
1083         ps_closepage(p);
1084 }
1085 
1086 
1087 static void
1088 ps_setfont(struct termp *p, enum termfont f)
1089 {
1090 
1091         assert(f < TERMFONT__MAX);
1092         p->ps->lastf = f;
1093         
1094         /*
1095          * If we're still at the top of the page, let the font-setting
1096          * be delayed until we actually have stuff to print.
1097          */
1098 
1099         if (PS_NEWPAGE & p->ps->flags)
1100                 return;
1101 
1102         if (TERMTYPE_PS == p->type)
1103                 ps_printf(p, "/%s %zu selectfont\n", 
1104                                 fonts[(int)f].name, 
1105                                 p->ps->scale);
1106         else
1107                 ps_printf(p, "/F%d %zu Tf\n", 
1108                                 (int)f, 
1109                                 p->ps->scale);
1110 }
1111 
1112 
1113 /* ARGSUSED */
1114 static size_t
1115 ps_width(const struct termp *p, int c)
1116 {
1117 
1118         if (c <= 32 || c - 32 >= MAXCHAR)
1119                 return((size_t)fonts[(int)TERMFONT_NONE].gly[0].wx);
1120 
1121         c -= 32;
1122         return((size_t)fonts[(int)TERMFONT_NONE].gly[c].wx);
1123 }
1124 
1125 
1126 static double
1127 ps_hspan(const struct termp *p, const struct roffsu *su)
1128 {
1129         double           r;
1130         
1131         /*
1132          * All of these measurements are derived by converting from the
1133          * native measurement to AFM units.
1134          */
1135 
1136         switch (su->unit) {
1137         case (SCALE_CM):
1138                 r = PNT2AFM(p, su->scale * 28.34);
1139                 break;
1140         case (SCALE_IN):
1141                 r = PNT2AFM(p, su->scale * 72);
1142                 break;
1143         case (SCALE_PC):
1144                 r = PNT2AFM(p, su->scale * 12);
1145                 break;
1146         case (SCALE_PT):
1147                 r = PNT2AFM(p, su->scale * 100);
1148                 break;
1149         case (SCALE_EM):
1150                 r = su->scale *
1151                         fonts[(int)TERMFONT_NONE].gly[109 - 32].wx;
1152                 break;
1153         case (SCALE_MM):
1154                 r = PNT2AFM(p, su->scale * 2.834);
1155                 break;
1156         case (SCALE_EN):
1157                 r = su->scale *
1158                         fonts[(int)TERMFONT_NONE].gly[110 - 32].wx;
1159                 break;
1160         case (SCALE_VS):
1161                 r = su->scale * p->ps->lineheight;
1162                 break;
1163         default:
1164                 r = su->scale;
1165                 break;
1166         }
1167 
1168         return(r);
1169 }
1170 
1171 static void
1172 ps_growbuf(struct termp *p, size_t sz)
1173 {
1174         if (p->ps->psmargcur + sz <= p->ps->psmargsz)
1175                 return;
1176 
1177         if (sz < PS_BUFSLOP)
1178                 sz = PS_BUFSLOP;
1179 
1180         p->ps->psmargsz += sz;
1181 
1182         p->ps->psmarg = mandoc_realloc
1183                 (p->ps->psmarg, p->ps->psmargsz);
1184 }
1185