ps.c

   1 #include <ctype.h>
   2 #include <stdarg.h>
   3 #include <stdio.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include "post.h"
   7
   8 static int o_f, o_s, o_m;       /* font and size */
   9 static int o_h, o_v;            /* current user position */
  10 static int p_f, p_s, p_m;       /* output postscript font */
  11 static int o_qtype;             /* queued character type */
  12 static int o_qv, o_qh, o_qend;  /* queued character position */
  13 static int o_rh, o_rv, o_rdeg;  /* previous rotation position and degree */
  14 static int o_gname;             /* use glyphshow for all glyphs */
  15
  16 static char o_fonts[FNLEN * NFONTS] = " ";
  17
  18 static void outvf(char *s, va_list ap)
  19 {
  20         vfprintf(stdout, s, ap);
  21 }
  22
  23 static void outf(char *s, ...)
  24 {
  25         va_list ap;
  26         va_start(ap, s);
  27         outvf(s, ap);
  28         va_end(ap);
  29 }
  30
  31 static void o_flush(void)
  32 {
  33         if (o_qtype == 1)
  34                 outf(") %d %d w\n", o_qh, o_qv);
  35         if (o_qtype == 2)
  36                 outf("] %d %d g\n", o_qh, o_qv);
  37         o_qtype = 0;
  38 }
  39
  40 void outgname(int g)
  41 {
  42         o_gname = g;
  43 }
  44
  45 void outpage(void)
  46 {
  47         o_flush();
  48         o_v = 0;
  49         o_h = 0;
  50         p_s = 0;
  51         p_f = 0;
  52         p_m = 0;
  53         o_rdeg = 0;
  54 }
  55
  56 static void o_queue(struct glyph *g)
  57 {
  58         int type = 1 + (g->pos <= 0 || o_gname);
  59         if (o_qtype != type || o_qend != o_h || o_qv != o_v) {
  60                 o_flush();
  61                 o_qh = o_h;
  62                 o_qv = o_v;
  63                 o_qtype = type;
  64                 outf(type == 1 ? "(" : "[");
  65         }
  66         if (o_qtype == 1) {
  67                 if (g->pos >= ' ' && g->pos <= '~')
  68                         outf("%s%c", strchr("()\\", g->pos) ? "\\" : "", g->pos);
  69                 else
  70                         outf("\\%d%d%d", (g->pos >> 6) & 7,
  71                                         (g->pos >> 3) & 7, g->pos & 7);
  72         } else {
  73                 outf("/%s", g->id);
  74         }
  75         o_qend = o_h + font_wid(g->font, o_s, g->wid);
  76 }
  77
  78 /* calls o_flush() if necessary */
  79 void out(char *s, ...)
  80 {
  81         va_list ap;
  82         o_flush();
  83         va_start(ap, s);
  84         outvf(s, ap);
  85         va_end(ap);
  86 }
  87
  88 static void out_fontup(int fid)
  89 {
  90         char fnname[FNLEN];
  91         struct font *fn;
  92         if (o_m != p_m) {
  93                 out("%d %d %d rgb\n", CLR_R(o_m), CLR_G(o_m), CLR_B(o_m));
  94                 p_m = o_m;
  95         }
  96         if (fid != p_f || o_s != p_s) {
  97                 fn = dev_font(fid);
  98                 out("%d /%s f\n", o_s, font_name(fn));
  99                 p_f = fid;
 100                 p_s = o_s;
 101                 sprintf(fnname, " %s ", font_name(fn));
 102                 if (!strstr(o_fonts, fnname))
 103                         sprintf(strchr(o_fonts, '\0'), "%s ", font_name(fn));
 104         }
 105 }
 106
 107 void outc(char *c)
 108 {
 109         struct glyph *g;
 110         struct font *fn;
 111         g = dev_glyph(c, o_f);
 112         fn = g ? g->font : dev_font(o_f);
 113         if (!g) {
 114                 outrel(*c == ' ' && fn ? font_swid(fn, o_s) : 1, 0);
 115                 return;
 116         }
 117         out_fontup(dev_fontid(fn));
 118         o_queue(g);
 119 }
 120
 121 void outh(int h)
 122 {
 123         o_h = h;
 124 }
 125
 126 void outv(int v)
 127 {
 128         o_v = v;
 129 }
 130
 131 void outrel(int h, int v)
 132 {
 133         o_h += h;
 134         o_v += v;
 135 }
 136
 137 void outfont(int f)
 138 {
 139         if (dev_font(f))
 140                 o_f = f;
 141 }
 142
 143 /* a font was mounted at pos f */
 144 void outmnt(int f)
 145 {
 146         if (p_f == f)
 147                 p_f = -1;
 148 }
 149
 150 void outsize(int s)
 151 {
 152         if (s > 0)
 153                 o_s = s;
 154 }
 155
 156 void outcolor(int c)
 157 {
 158         o_m = c;
 159 }
 160
 161 void outrotate(int deg)
 162 {
 163         o_flush();
 164         out_fontup(o_f);
 165         if (o_rdeg)
 166                 outf("%d %d %d rot\n", -o_rdeg, o_rh, o_rv);
 167         o_rdeg = deg;
 168         o_rh = o_h;
 169         o_rv = o_v;
 170         outf("%d %d %d rot\n", deg, o_h, o_v);
 171 }
 172
 173 static int draw_path;   /* number of path segments */
 174 static int draw_point;  /* point was set for postscript newpath */
 175
 176 static void drawmv(void)
 177 {
 178         if (!draw_point)
 179                 outf("%d %d m ", o_h, o_v);
 180         draw_point = 1;
 181 }
 182
 183 /* start a multi-segment path */
 184 void drawmbeg(char *s)
 185 {
 186         o_flush();
 187         out_fontup(o_f);
 188         draw_path = 1;
 189         outf("gsave newpath %s\n", s);
 190 }
 191
 192 /* end a multi-segment path */
 193 void drawmend(char *s)
 194 {
 195         draw_path = 0;
 196         draw_point = 0;
 197         outf("%s grestore\n", s);
 198 }
 199
 200 void drawbeg(void)
 201 {
 202         o_flush();
 203         out_fontup(o_f);
 204         if (draw_path)
 205                 return;
 206         outf("newpath ");
 207 }
 208
 209 void drawend(int close, int fill)
 210 {
 211         if (draw_path)
 212                 return;
 213         draw_point = 0;
 214         if (close)
 215                 outf("closepath ");
 216         if (fill)
 217                 outf("fill\n");
 218         else
 219                 outf("stroke\n");
 220 }
 221
 222 void drawl(int h, int v)
 223 {
 224         drawmv();
 225         outrel(h, v);
 226         outf("%d %d drawl ", o_h, o_v);
 227 }
 228
 229 void drawc(int c)
 230 {
 231         drawmv();
 232         outrel(c, 0);
 233         outf("%d %d drawe ", c, c);
 234 }
 235
 236 void drawe(int h, int v)
 237 {
 238         drawmv();
 239         outrel(h, 0);
 240         outf("%d %d drawe ", h, v);
 241 }
 242
 243 void drawa(int h1, int v1, int h2, int v2)
 244 {
 245         drawmv();
 246         outf("%d %d %d %d drawa ", h1, v1, h2, v2);
 247         outrel(h1 + h2, v1 + v2);
 248 }
 249
 250 void draws(int h1, int v1, int h2, int v2)
 251 {
 252         drawmv();
 253         outf("%d %d %d %d %d %d draws ", o_h, o_v, o_h + h1, o_v + v1,
 254                 o_h + h1 + h2, o_v + v1 + v2);
 255         outrel(h1, v1);
 256 }
 257
 258 static char *strcut(char *dst, char *src)
 259 {
 260         while (*src == ' ' || *src == '\n')
 261                 src++;
 262         if (src[0] == '"') {
 263                 src++;
 264                 while (*src && (src[0] != '"' || src[1] == '"')) {
 265                         if (*src == '"')
 266                                 src++;
 267                         *dst++ = *src++;
 268                 }
 269                 if (*src == '"')
 270                         src++;
 271         } else {
 272                 while (*src && *src != ' ' && *src != '\n')
 273                         *dst++ = *src++;
 274         }
 275         *dst = '\0';
 276         return src;
 277 }
 278
 279 void outeps(char *spec)
 280 {
 281         char eps[1 << 12];
 282         char buf[1 << 12];
 283         int llx, lly, urx, ury;
 284         int hwid, vwid;
 285         FILE *filp;
 286         int nspec, nbb;
 287         spec = strcut(eps, spec);
 288         if (!eps[0])
 289                 return;
 290         nspec = sscanf(spec, "%d %d", &hwid, &vwid);
 291         if (nspec < 1)
 292                 hwid = 0;
 293         if (nspec < 2)
 294                 vwid = 0;
 295         if (!(filp = fopen(eps, "r")))
 296                 return;
 297         if (!fgets(buf, sizeof(buf), filp) ||
 298                         (strcmp(buf, "%!PS-Adobe-2.0 EPSF-1.2\n") &&
 299                         strcmp(buf, "%!PS-Adobe-2.0 EPSF-2.0\n") &&
 300                         strcmp(buf, "%!PS-Adobe-3.0 EPSF-3.0\n"))) {
 301                 fclose(filp);
 302                 return;
 303         }
 304         nbb = 0;
 305         while (fgets(buf, sizeof(buf), filp))
 306                 if (!strncmp(buf, "%%BoundingBox: ", 15))
 307                         if ((nbb = sscanf(buf + 15, "%d %d %d %d",
 308                                         &llx, &lly, &urx, &ury)) == 4)
 309                                 break;
 310         fclose(filp);
 311         if (nbb < 4)            /* no BoundingBox comment */
 312                 return;
 313         if (hwid <= 0 && vwid <= 0)
 314                 hwid = (urx - llx) * dev_res / 72;
 315         if (vwid <= 0)
 316                 vwid = (ury - lly) * hwid / (urx - llx);
 317         if (hwid <= 0)
 318                 hwid = (urx - llx) * vwid / (ury - lly);
 319         /* output the EPS file */
 320         o_flush();
 321         out_fontup(o_f);
 322         outf("%d %d %d %d %d %d %d %d EPSFBEG\n",
 323                 llx, lly, hwid, urx - llx, vwid, ury - lly, o_h, o_v);
 324         outf("%%%%BeginDocument: %s\n", eps);
 325         filp = fopen(eps, "r");
 326         while (fgets(buf, sizeof(buf), filp))
 327                 out("%s", buf);
 328         fclose(filp);
 329         outf("%%%%EndDocument\n");
 330         outf("EPSFEND\n");
 331 }
 332
 333 void outpdf(char *spec)
 334 {
 335 }
 336
 337 void outlink(char *spec)
 338 {
 339         char lnk[1 << 12];
 340         int hwid, vwid;
 341         int nspec;
 342         spec = strcut(lnk, spec);
 343         if (!lnk[0] || (nspec = sscanf(spec, "%d %d", &hwid, &vwid)) != 2)
 344                 return;
 345         o_flush();
 346         if (lnk[0] == '#' || isdigit((unsigned char) lnk[0])) {
 347                 outf("[ /Rect [ %d %d t %d %d t ] %s%s "
 348                         "/Subtype /Link /LNK pdfmark\n",
 349                         o_h, o_v, o_h + hwid, o_v + vwid,
 350                         lnk[0] == '#' ? "/Dest /" : "/Page ",
 351                         lnk[0] == '#' ? lnk + 1 : lnk);
 352         } else {
 353                 outf("[ /Rect [ %d %d t %d %d t ] "
 354                         "/Action << /Subtype /URI /URI (%s) >> /Open true "
 355                         "/Subtype /Link /LNK pdfmark\n",
 356                         o_h, o_v, o_h + hwid, o_v + vwid, lnk);
 357         }
 358 }
 359
 360 void ps_pagebeg(int n)
 361 {
 362         out("%%%%Page: %d %d\n", n, n);
 363         out("/saveobj save def\n");
 364         out("mark\n");
 365         out("%d pagesetup\n", n);
 366 }
 367
 368 void ps_pageend(int n)
 369 {
 370         out("cleartomark\n");
 371         out("showpage\n");
 372         out("saveobj restore\n");
 373 }
 374
 375 void ps_trailer(int pages)
 376 {
 377         out("%%%%Trailer\n");
 378         out("done\n");
 379         out("%%%%DocumentFonts: %s\n", o_fonts);
 380         out("%%%%Pages: %d\n", pages);
 381         out("%%%%EOF\n");
 382 }
 383
 384 static char *prolog =
 385         "/setup {\n"
 386         "       counttomark 2 idiv {def} repeat pop\n"
 387         "       /scaling 72 resolution div def\n"
 388         "       linewidth setlinewidth\n"
 389         "       1 setlinecap\n"
 390         "       0 pagesize 1 get translate\n"
 391         "       scaling scaling scale\n"
 392         "       0 0 moveto\n"
 393         "} def\n"
 394         "\n"
 395         "/pagesetup {\n"
 396         "       /page exch def\n"
 397         "       currentdict /pagedict known currentdict page known and {\n"
 398         "               page load pagedict exch get cvx exec\n"
 399         "       } if\n"
 400         "} def\n"
 401         "\n"
 402         "/pdfmark where\n"
 403         "       { pop globaldict /?pdfmark /exec load put }\n"
 404         "       { globaldict begin\n"
 405         "               /?pdfmark /pop load def\n"
 406         "               /pdfmark /cleartomark load def\n"
 407         "               end }\n"
 408         "       ifelse\n"
 409         "\n"
 410         "/t {neg} bind def\n"
 411         "/w {neg moveto show} bind def\n"
 412         "/m {neg moveto} bind def\n"
 413         "/g {neg moveto {glyphshow} forall} bind def\n"
 414         "/rgb {255 div 3 1 roll 255 div 3 1 roll 255 div 3 1 roll setrgbcolor} bind def\n"
 415         "/rot {/y exch def /x exch def x y neg translate rotate x neg y translate} bind def\n"
 416         "/done {/lastpage where {pop lastpage} if} def\n"
 417         "\n"
 418         "% caching fonts, as selectfont is supposed to be doing\n"
 419         "/fncache 16 dict def\n"
 420         "/selectfont_append { fncache exch dup findfont put } bind def\n"
 421         "/selectfont_cached {\n"
 422         "       exch dup fncache exch known not { dup selectfont_append } if\n"
 423         "       fncache exch get exch scalefont setfont\n"
 424         "} bind def\n"
 425         "/f {\n"
 426         "       exch dup 3 1 roll scaling div selectfont_cached\n"
 427         "       linewidth mul scaling 10 mul div setlinewidth\n"
 428         "} bind def\n"
 429         "\n"
 430         "/savedmatrix matrix def\n"
 431         "/drawl {\n"
 432         "       neg lineto\n"
 433         "} bind def\n"
 434         "/drawe {\n"
 435         "       savedmatrix currentmatrix pop scale\n"
 436         "       .5 0 rmoveto currentpoint .5 0 rmoveto .5 0 360 arc\n"
 437         "       savedmatrix setmatrix\n"
 438         "} bind def\n"
 439         "/drawa {\n"
 440         "       /dy2 exch def\n"
 441         "       /dx2 exch def\n"
 442         "       /dy1 exch def\n"
 443         "       /dx1 exch def\n"
 444         "       currentpoint dy1 neg add exch dx1 add exch\n"
 445         "       dx1 dx1 mul dy1 dy1 mul add sqrt\n"
 446         "       dy1 dx1 neg atan\n"
 447         "       dy2 neg dx2 atan\n"
 448         "       arc\n"
 449         "} bind def\n"
 450         "/draws {\n"
 451         "       /y2 exch def\n"
 452         "       /x2 exch def\n"
 453         "       /y1 exch def\n"
 454         "       /x1 exch def\n"
 455         "       /y0 exch def\n"
 456         "       /x0 exch def\n"
 457         "       x0 5 x1 mul add 6 div\n"
 458         "       y0 5 y1 mul add -6 div\n"
 459         "       x2 5 x1 mul add 6 div\n"
 460         "       y2 5 y1 mul add -6 div\n"
 461         "       x1 x2 add 2 div\n"
 462         "       y1 y2 add -2 div\n"
 463         "       curveto\n"
 464         "} bind def\n"
 465         "% including EPS files\n"
 466         "/EPSFBEG {\n"
 467         "       /epsf_state save def\n"
 468         "       neg translate\n"
 469         "       div 3 1 roll div exch scale\n"
 470         "       neg exch neg exch translate\n"
 471         "       /dict_count countdictstack def\n"
 472         "       /op_count count 1 sub def\n"
 473         "       userdict begin\n"
 474         "       /showpage { } def\n"
 475         "       0 setgray 0 setlinecap 1 setlinewidth 0 setlinejoin\n"
 476         "       10 setmiterlimit [ ] 0 setdash newpath\n"
 477         "} bind def\n"
 478         "/EPSFEND {\n"
 479         "       count op_count sub {pop} repeat\n"
 480         "       countdictstack dict_count sub {end} repeat\n"
 481         "       epsf_state restore\n"
 482         "} bind def\n";
 483
 484 /* pagewidth and pageheight are in tenths of a millimetre */
 485 void ps_header(char *title, int pagewidth, int pageheight, int linewidth)
 486 {
 487         out("%%!PS-Adobe-2.0\n");
 488         out("%%%%Version: 1.0\n");
 489         if (title)
 490                 out("%%%%Title: %s\n", title);
 491         out("%%%%Creator: Neatroff\n");
 492         out("%%%%DocumentFonts: (atend)\n");
 493         out("%%%%Pages: (atend)\n");
 494         out("%%%%EndComments\n");
 495
 496         out("%%%%BeginProlog\n");
 497         out("/resolution %d def\n", dev_res);
 498         out("/pagesize [%d %d] def\n", (pagewidth * 72 + 127) / 254,
 499                                         (pageheight * 72 + 127) / 254);
 500         out("/linewidth %d.%02d def\n\n", linewidth / 100, linewidth % 100);
 501         out("%s", prolog);
 502         out("%%%%EndProlog\n");
 503         out("%%%%BeginSetup\n");
 504         out("<< /PageSize pagesize /ImagingBBox null >> setpagedevice\n");
 505         out("mark\n");
 506         out("setup\n");
 507         out("%%%%EndSetup\n");
 508 }