dlls/wineps.drv/type1afm.c

   1 /*******************************************************************************
   2  *  Adobe Font Metric (AFM) file parsing functions for Wine PostScript driver.
   3  *  See http://partners.adobe.com/asn/developer/pdfs/tn/5004.AFM_Spec.pdf.
   4  *
   5  *  Copyright 2001  Ian Pilcher
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  20  *
  21  *  NOTE:  Many of the functions in this file can return either fatal errors
  22  *      (memory allocation failure) or non-fatal errors (unusable AFM file).
  23  *      Fatal errors are indicated by returning FALSE; see individual function
  24  *      descriptions for how they indicate non-fatal errors.
  25  *
  26  */
  27
  28 #include "config.h"
  29 #include "wine/port.h"
  30
  31 #include <string.h>
  32 #include <stdlib.h>
  33 #include <stdarg.h>
  34 #include <stdio.h>
  35 #include <dirent.h>
  36 #include <errno.h>
  37 #include <ctype.h>
  38 #include <limits.h>         /* INT_MIN */
  39
  40 #ifdef HAVE_FLOAT_H
  41 #include <float.h>          /* FLT_MAX */
  42 #endif
  43
  44 #include "windef.h"
  45 #include "winbase.h"
  46 #include "winerror.h"
  47 #include "winreg.h"
  48 #include "psdrv.h"
  49 #include "wine/debug.h"
  50
  51 WINE_DEFAULT_DEBUG_CHANNEL(psdrv);
  52
  53 /*******************************************************************************
  54  *  ReadLine
  55  *
  56  *  Reads a line from a text file into the buffer and trims trailing whitespace.
  57  *  Can handle DOS and Unix text files, including weird DOS EOF.  Returns FALSE
  58  *  for unexpected I/O errors; otherwise returns TRUE and sets *p_result to
  59  *  either the number of characters in the returned string or one of the
  60  *  following:
  61  *
  62  *      0:          Blank (or all whitespace) line.  This is just a special case
  63  *                  of the normal behavior.
  64  *
  65  *      EOF:        End of file has been reached.
  66  *
  67  *      INT_MIN:    Buffer overflow.  Returned string is truncated (duh!) and
  68  *                  trailing whitespace is *not* trimmed.  Remaining text in
  69  *                  line is discarded.  (I.e. the file pointer is positioned at
  70  *                  the beginning of the next line.)
  71  *
  72  */
  73 static BOOL ReadLine(FILE *file, CHAR buffer[], INT bufsize, INT *p_result)
  74 {
  75      CHAR   *cp;
  76      INT    i;
  77
  78      if (fgets(buffer, bufsize, file) == NULL)
  79      {
  80         if (feof(file) == 0)                            /* EOF or error? */
  81         {
  82             ERR("%s\n", strerror(errno));
  83             return FALSE;
  84         }
  85
  86         *p_result = EOF;
  87         return TRUE;
  88     }
  89
  90     cp = strchr(buffer, '\n');
  91     if (cp == NULL)
  92     {
  93         i = strlen(buffer);
  94
  95         if (i == bufsize - 1)       /* max possible; was line truncated? */
  96         {
  97             do
  98                 i = fgetc(file);                /* find the newline or EOF */
  99             while (i != '\n' && i != EOF);
 100
 101             if (i == EOF)
 102             {
 103                 if (feof(file) == 0)                    /* EOF or error? */
 104                 {
 105                     ERR("%s\n", strerror(errno));
 106                     return FALSE;
 107                 }
 108
 109                 WARN("No newline at EOF\n");
 110             }
 111
 112             *p_result = INT_MIN;
 113             return TRUE;
 114         }
 115         else                            /* no newline and not truncated */
 116         {
 117             if (strcmp(buffer, "\x1a") == 0)        /* test for DOS EOF */
 118             {
 119                 *p_result = EOF;
 120                 return TRUE;
 121             }
 122
 123             WARN("No newline at EOF\n");
 124             cp = buffer + i;    /* points to \0 where \n should have been */
 125         }
 126     }
 127
 128     do
 129     {
 130         *cp = '\0';                             /* trim trailing whitespace */
 131         if (cp == buffer)
 132             break;                              /* don't underflow buffer */
 133         --cp;
 134     }
 135     while (isspace(*cp));
 136
 137     *p_result = strlen(buffer);
 138     return TRUE;
 139 }
 140
 141 /*******************************************************************************
 142  *  FindLine
 143  *
 144  *  Finds a line in the file that begins with the given string.  Returns FALSE
 145  *  for unexpected I/O errors; returns an empty (zero character) string if the
 146  *  requested line is not found.
 147  *
 148  *  NOTE:  The file pointer *MUST* be positioned at the beginning of a line when
 149  *      this function is called.  Otherwise, an infinite loop can result.
 150  *
 151  */
 152 static BOOL FindLine(FILE *file, CHAR buffer[], INT bufsize, LPCSTR key)
 153 {
 154     INT     len = strlen(key);
 155     LONG    start = ftell(file);
 156
 157     do
 158     {
 159         INT     result;
 160         BOOL    ok;
 161
 162         ok = ReadLine(file, buffer, bufsize, &result);
 163         if (ok == FALSE)
 164             return FALSE;
 165
 166         if (result > 0 && strncmp(buffer, key, len) == 0)
 167             return TRUE;
 168
 169         if (result == EOF)
 170         {
 171             rewind(file);
 172         }
 173         else if (result == INT_MIN)
 174         {
 175             WARN("Line beginning '%32s...' is too long; ignoring\n", buffer);
 176         }
 177     }
 178     while (ftell(file) != start);
 179
 180     WARN("Couldn't find line '%s...' in AFM file\n", key);
 181     buffer[0] = '\0';
 182     return TRUE;
 183 }
 184
 185 /*******************************************************************************
 186  *  DoubleToFloat
 187  *
 188  *  Utility function to convert double to float while checking for overflow.
 189  *  Will also catch strtod overflows, since HUGE_VAL > FLT_MAX (at least on
 190  *  Linux x86/gcc).
 191  *
 192  */
 193 static inline BOOL DoubleToFloat(float *p_f, double d)
 194 {
 195     if (d > (double)FLT_MAX || d < -(double)FLT_MAX)
 196         return FALSE;
 197
 198     *p_f = (float)d;
 199     return TRUE;
 200 }
 201
 202 /*******************************************************************************
 203  *  Round
 204  *
 205  *  Utility function to add or subtract 0.5 before converting to integer type.
 206  *
 207  */
 208 static inline float Round(float f)
 209 {
 210     return (f >= 0.0) ? (f + 0.5) : (f - 0.5);
 211 }
 212
 213 /*******************************************************************************
 214  *  ReadFloat
 215  *
 216  *  Finds and parses a line of the form '<key> <value>', where value is a
 217  *  number.  Sets *p_found to FALSE if a corresponding line cannot be found, or
 218  *  it cannot be parsed; also sets *p_ret to 0.0, so calling functions can just
 219  *  skip the check of *p_found if the item is not required.
 220  *
 221  */
 222 static BOOL ReadFloat(FILE *file, CHAR buffer[], INT bufsize, LPCSTR key,
 223         FLOAT *p_ret, BOOL *p_found)
 224 {
 225     CHAR    *cp, *end_ptr;
 226     double  d;
 227
 228     if (FindLine(file, buffer, bufsize, key) == FALSE)
 229         return FALSE;
 230
 231     if (buffer[0] == '\0')          /* line not found */
 232     {
 233         *p_found = FALSE;
 234         *p_ret = 0.0;
 235         return TRUE;
 236     }
 237
 238     cp = buffer + strlen(key);                      /* first char after key */
 239     errno = 0;
 240     d = strtod(cp, &end_ptr);
 241
 242     if (end_ptr == cp || errno != 0 || DoubleToFloat(p_ret, d) == FALSE)
 243     {
 244         WARN("Error parsing line '%s'\n", buffer);
 245         *p_found = FALSE;
 246         *p_ret = 0.0;
 247         return TRUE;
 248     }
 249
 250     *p_found = TRUE;
 251     return TRUE;
 252 }
 253
 254 /*******************************************************************************
 255  *  ReadInt
 256  *
 257  *  See description of ReadFloat.
 258  *
 259  */
 260 static BOOL ReadInt(FILE *file, CHAR buffer[], INT bufsize, LPCSTR key,
 261         INT *p_ret, BOOL *p_found)
 262 {
 263     BOOL    retval;
 264     FLOAT   f;
 265
 266     retval = ReadFloat(file, buffer, bufsize, key, &f, p_found);
 267     if (retval == FALSE || *p_found == FALSE)
 268     {
 269         *p_ret = 0;
 270         return retval;
 271     }
 272
 273     f = Round(f);
 274
 275     if (f > (FLOAT)INT_MAX || f < (FLOAT)INT_MIN)
 276     {
 277         WARN("Error parsing line '%s'\n", buffer);
 278         *p_ret = 0;
 279         *p_found = FALSE;
 280         return TRUE;
 281     }
 282
 283     *p_ret = (INT)f;
 284     return TRUE;
 285 }
 286
 287 /*******************************************************************************
 288  *  ReadString
 289  *
 290  *  Returns FALSE on I/O error or memory allocation failure; sets *p_str to NULL
 291  *  if line cannot be found or can't be parsed.
 292  *
 293  */
 294 static BOOL ReadString(FILE *file, CHAR buffer[], INT bufsize, LPCSTR key,
 295         LPSTR *p_str)
 296 {
 297     CHAR    *cp;
 298
 299     if (FindLine(file, buffer, bufsize, key) == FALSE)
 300         return FALSE;
 301
 302     if (buffer[0] == '\0')
 303     {
 304         *p_str = NULL;
 305         return TRUE;
 306     }
 307
 308     cp = buffer + strlen(key);                      /* first char after key */
 309     if (*cp == '\0')
 310     {
 311         *p_str = NULL;
 312         return TRUE;
 313     }
 314
 315     while (isspace(*cp))                /* find first non-whitespace char */
 316         ++cp;
 317
 318     *p_str = HeapAlloc(PSDRV_Heap, 0, strlen(cp) + 1);
 319     if (*p_str == NULL)
 320         return FALSE;
 321
 322     strcpy(*p_str, cp);
 323     return TRUE;
 324 }
 325
 326 /*******************************************************************************
 327  *  ReadBBox
 328  *
 329  *  Similar to ReadFloat above.
 330  *
 331  */
 332 static BOOL ReadBBox(FILE *file, CHAR buffer[], INT bufsize, AFM *afm,
 333         BOOL *p_found)
 334 {
 335     CHAR    *cp, *end_ptr;
 336     double  d;
 337
 338     if (FindLine(file, buffer, bufsize, "FontBBox") == FALSE)
 339         return FALSE;
 340
 341     if (buffer[0] == '\0')
 342     {
 343         *p_found = FALSE;
 344         return TRUE;
 345     }
 346
 347     errno = 0;
 348
 349     cp = buffer + sizeof("FontBBox");
 350     d = strtod(cp, &end_ptr);
 351     if (end_ptr == cp || errno != 0 ||
 352             DoubleToFloat(&(afm->FontBBox.llx), d) == FALSE)
 353         goto parse_error;
 354
 355     cp = end_ptr;
 356     d = strtod(cp, &end_ptr);
 357     if (end_ptr == cp || errno != 0 ||
 358             DoubleToFloat(&(afm->FontBBox.lly), d) == FALSE)
 359         goto parse_error;
 360
 361     cp = end_ptr;
 362     d = strtod(cp, &end_ptr);
 363     if (end_ptr == cp || errno != 0
 364             || DoubleToFloat(&(afm->FontBBox.urx), d) == FALSE)
 365         goto parse_error;
 366
 367     cp = end_ptr;
 368     d = strtod(cp, &end_ptr);
 369     if (end_ptr == cp || errno != 0
 370             || DoubleToFloat(&(afm->FontBBox.ury), d) == FALSE)
 371         goto parse_error;
 372
 373     *p_found = TRUE;
 374     return TRUE;
 375
 376     parse_error:
 377         WARN("Error parsing line '%s'\n", buffer);
 378         *p_found = FALSE;
 379         return TRUE;
 380 }
 381
 382 /*******************************************************************************
 383  *  ReadWeight
 384  *
 385  *  Finds and parses the 'Weight' line of an AFM file.  Only tries to determine
 386  *  if a font is bold (FW_BOLD) or not (FW_NORMAL) -- ignoring all those cute
 387  *  little FW_* typedefs in the Win32 doc.  AFAICT, this is what the Windows
 388  *  PostScript driver does.
 389  *
 390  */
 391 static const struct { LPCSTR keyword; INT weight; } afm_weights[] =
 392 {
 393     { "REGULAR",        FW_NORMAL },
 394     { "NORMAL",         FW_NORMAL },
 395     { "ROMAN",          FW_NORMAL },
 396     { "BOLD",           FW_BOLD },
 397     { "BOOK",           FW_NORMAL },
 398     { "MEDIUM",         FW_NORMAL },
 399     { "LIGHT",          FW_NORMAL },
 400     { "BLACK",          FW_BOLD },
 401     { "HEAVY",          FW_BOLD },
 402     { "DEMI",           FW_BOLD },
 403     { "ULTRA",          FW_BOLD },
 404     { "SUPER" ,         FW_BOLD },
 405     { NULL,             0 }
 406 };
 407
 408 static BOOL ReadWeight(FILE *file, CHAR buffer[], INT bufsize, AFM *afm,
 409         BOOL *p_found)
 410 {
 411     LPSTR   sz;
 412     CHAR    *cp;
 413     INT     i;
 414
 415     if (ReadString(file, buffer, bufsize, "Weight", &sz) == FALSE)
 416         return FALSE;
 417
 418     if (sz == NULL)
 419     {
 420         *p_found = FALSE;
 421         return TRUE;
 422     }
 423
 424     for (cp = sz; *cp != '\0'; ++cp)
 425         *cp = toupper(*cp);
 426
 427     for (i = 0; afm_weights[i].keyword != NULL; ++i)
 428     {
 429         if (strstr(sz, afm_weights[i].keyword) != NULL)
 430         {
 431             afm->Weight = afm_weights[i].weight;
 432             *p_found = TRUE;
 433             HeapFree(PSDRV_Heap, 0, sz);
 434             return TRUE;
 435         }
 436     }
 437
 438     WARN("Unknown weight '%s'; treating as Roman\n", sz);
 439
 440     afm->Weight = FW_NORMAL;
 441     *p_found = TRUE;
 442     HeapFree(PSDRV_Heap, 0, sz);
 443     return TRUE;
 444 }
 445
 446 /*******************************************************************************
 447  *  ReadFixedPitch
 448  *
 449  */
 450 static BOOL ReadFixedPitch(FILE *file, CHAR buffer[], INT bufsize, AFM *afm,
 451         BOOL *p_found)
 452 {
 453     LPSTR   sz;
 454
 455     if (ReadString(file, buffer, bufsize, "IsFixedPitch", &sz) == FALSE)
 456         return FALSE;
 457
 458     if (sz == NULL)
 459     {
 460         *p_found = FALSE;
 461         return TRUE;
 462     }
 463
 464     if (strcasecmp(sz, "false") == 0)
 465     {
 466         afm->IsFixedPitch = FALSE;
 467         *p_found = TRUE;
 468         HeapFree(PSDRV_Heap, 0, sz);
 469         return TRUE;
 470     }
 471
 472     if (strcasecmp(sz, "true") == 0)
 473     {
 474         afm->IsFixedPitch = TRUE;
 475         *p_found = TRUE;
 476         HeapFree(PSDRV_Heap, 0, sz);
 477         return TRUE;
 478     }
 479
 480     WARN("Can't parse line '%s'\n", buffer);
 481
 482     *p_found = FALSE;
 483     HeapFree(PSDRV_Heap, 0, sz);
 484     return TRUE;
 485 }
 486
 487 /*******************************************************************************
 488  *  ReadFontMetrics
 489  *
 490  *  Allocates space for the AFM on the driver heap and reads basic font metrics.
 491  *  Returns FALSE for memory allocation failure; sets *p_afm to NULL if AFM file
 492  *  is unusable.
 493  *
 494  */
 495 static BOOL ReadFontMetrics(FILE *file, CHAR buffer[], INT bufsize, AFM **p_afm)
 496 {
 497     AFM     *afm;
 498     BOOL    retval, found;
 499
 500     *p_afm = afm = HeapAlloc(PSDRV_Heap, 0, sizeof(*afm));
 501     if (afm == NULL)
 502         return FALSE;
 503
 504     retval = ReadWeight(file, buffer, bufsize, afm, &found);
 505     if (retval == FALSE || found == FALSE)
 506         goto cleanup_afm;
 507
 508     retval = ReadFloat(file, buffer, bufsize, "ItalicAngle",
 509             &(afm->ItalicAngle), &found);
 510     if (retval == FALSE || found == FALSE)
 511         goto cleanup_afm;
 512
 513     retval = ReadFixedPitch(file, buffer, bufsize, afm, &found);
 514     if (retval == FALSE || found == FALSE)
 515         goto cleanup_afm;
 516
 517     retval = ReadBBox(file, buffer, bufsize, afm, &found);
 518     if (retval == FALSE || found == FALSE)
 519         goto cleanup_afm;
 520
 521     retval = ReadFloat(file, buffer, bufsize, "UnderlinePosition",
 522             &(afm->UnderlinePosition), &found);
 523     if (retval == FALSE || found == FALSE)
 524         goto cleanup_afm;
 525
 526     retval = ReadFloat(file, buffer, bufsize, "UnderlineThickness",
 527             &(afm->UnderlineThickness), &found);
 528     if (retval == FALSE || found == FALSE)
 529         goto cleanup_afm;
 530
 531     retval = ReadFloat(file, buffer, bufsize, "Ascender",       /* optional */
 532             &(afm->Ascender), &found);
 533     if (retval == FALSE)
 534         goto cleanup_afm;
 535
 536     retval = ReadFloat(file, buffer, bufsize, "Descender",      /* optional */
 537             &(afm->Descender), &found);
 538     if (retval == FALSE)
 539         goto cleanup_afm;
 540
 541     afm->WinMetrics.usUnitsPerEm = 1000;
 542     afm->WinMetrics.sTypoAscender = (SHORT)Round(afm->Ascender);
 543     afm->WinMetrics.sTypoDescender = (SHORT)Round(afm->Descender);
 544
 545     if (afm->WinMetrics.sTypoAscender == 0)
 546         afm->WinMetrics.sTypoAscender = (SHORT)Round(afm->FontBBox.ury);
 547
 548     if (afm->WinMetrics.sTypoDescender == 0)
 549         afm->WinMetrics.sTypoDescender = (SHORT)Round(afm->FontBBox.lly);
 550
 551     afm->WinMetrics.sTypoLineGap = 1200 -
 552             (afm->WinMetrics.sTypoAscender - afm->WinMetrics.sTypoDescender);
 553     if (afm->WinMetrics.sTypoLineGap < 0)
 554         afm->WinMetrics.sTypoLineGap = 0;
 555
 556     return TRUE;
 557
 558     cleanup_afm:                        /* handle fatal or non-fatal errors */
 559         HeapFree(PSDRV_Heap, 0, afm);
 560         *p_afm = NULL;
 561         return retval;
 562 }
 563
 564 /*******************************************************************************
 565  *  ParseC
 566  *
 567  *  Fatal error:        return FALSE (none defined)
 568  *
 569  *  Non-fatal error:    leave metrics->C set to INT_MAX
 570  *
 571  */
 572 static BOOL ParseC(LPSTR sz, OLD_AFMMETRICS *metrics)
 573 {
 574     int     base = 10;
 575     long    l;
 576     CHAR    *cp, *end_ptr;
 577
 578     cp = sz + 1;
 579
 580     if (*cp == 'H')
 581     {
 582         base = 16;
 583         ++cp;
 584     }
 585
 586     errno = 0;
 587     l = strtol(cp, &end_ptr, base);
 588     if (end_ptr == cp || errno != 0 || l > INT_MAX || l < INT_MIN)
 589     {
 590         WARN("Error parsing character code '%s'\n", sz);
 591         return TRUE;
 592     }
 593
 594     metrics->C = (INT)l;
 595     return TRUE;
 596 }
 597
 598 /*******************************************************************************
 599  *  ParseW
 600  *
 601  *  Fatal error:        return FALSE (none defined)
 602  *
 603  *  Non-fatal error:    leave metrics->WX set to FLT_MAX
 604  *
 605  */
 606 static BOOL ParseW(LPSTR sz, OLD_AFMMETRICS *metrics)
 607 {
 608     CHAR    *cp, *end_ptr;
 609     BOOL    vector = TRUE;
 610     double  d;
 611
 612     cp = sz + 1;
 613
 614     if (*cp == '0')
 615         ++cp;
 616
 617     if (*cp == 'X')
 618     {
 619         vector = FALSE;
 620         ++cp;
 621     }
 622
 623     if (!isspace(*cp))
 624         goto parse_error;
 625
 626     errno = 0;
 627     d = strtod(cp, &end_ptr);
 628     if (end_ptr == cp || errno != 0 ||
 629             DoubleToFloat(&(metrics->WX), d) == FALSE)
 630         goto parse_error;
 631
 632     if (vector == FALSE)
 633         return TRUE;
 634
 635     /*  Make sure that Y component of vector is zero */
 636
 637     d = strtod(cp, &end_ptr);                               /* errno == 0 */
 638     if (end_ptr == cp || errno != 0 || d != 0.0)
 639     {
 640         metrics->WX = FLT_MAX;
 641         goto parse_error;
 642     }
 643
 644     return TRUE;
 645
 646     parse_error:
 647         WARN("Error parsing character width '%s'\n", sz);
 648         return TRUE;
 649 }
 650
 651 /*******************************************************************************
 652  *
 653  *  ParseB
 654  *
 655  *  Fatal error:        return FALSE (none defined)
 656  *
 657  *  Non-fatal error:    leave metrics->B.ury set to FLT_MAX
 658  *
 659  */
 660 static BOOL ParseB(LPSTR sz, OLD_AFMMETRICS *metrics)
 661 {
 662     CHAR    *cp, *end_ptr;
 663     double  d;
 664
 665     errno = 0;
 666
 667     cp = sz + 1;
 668     d = strtod(cp, &end_ptr);
 669     if (end_ptr == cp || errno != 0 ||
 670             DoubleToFloat(&(metrics->B.llx), d) == FALSE)
 671         goto parse_error;
 672
 673     cp = end_ptr;
 674     d = strtod(cp, &end_ptr);
 675     if (end_ptr == cp || errno != 0 ||
 676             DoubleToFloat(&(metrics->B.lly), d) == FALSE)
 677         goto parse_error;
 678
 679     cp = end_ptr;
 680     d = strtod(cp, &end_ptr);
 681     if (end_ptr == cp || errno != 0 ||
 682             DoubleToFloat(&(metrics->B.urx), d) == FALSE)
 683         goto parse_error;
 684
 685     cp = end_ptr;
 686     d = strtod(cp, &end_ptr);
 687     if (end_ptr == cp || errno != 0 ||
 688             DoubleToFloat(&(metrics->B.ury), d) == FALSE)
 689         goto parse_error;
 690
 691     return TRUE;
 692
 693     parse_error:
 694         WARN("Error parsing glyph bounding box '%s'\n", sz);
 695         return TRUE;
 696 }
 697
 698 /*******************************************************************************
 699  *  ParseN
 700  *
 701  *  Fatal error:        return FALSE (PSDRV_GlyphName failure)
 702  *
 703  *  Non-fatal error:    leave metrics-> set to NULL
 704  *
 705  */
 706 static BOOL ParseN(LPSTR sz, OLD_AFMMETRICS *metrics)
 707 {
 708     CHAR    save, *cp, *end_ptr;
 709
 710     cp = sz + 1;
 711
 712     while (isspace(*cp))
 713         ++cp;
 714
 715     end_ptr = cp;
 716
 717     while (*end_ptr != '\0' && !isspace(*end_ptr))
 718         ++end_ptr;
 719
 720     if (end_ptr == cp)
 721     {
 722         WARN("Error parsing glyph name '%s'\n", sz);
 723         return TRUE;
 724     }
 725
 726     save = *end_ptr;
 727     *end_ptr = '\0';
 728
 729     metrics->N = PSDRV_GlyphName(cp);
 730     if (metrics->N == NULL)
 731         return FALSE;
 732
 733     *end_ptr = save;
 734     return TRUE;
 735 }
 736
 737 /*******************************************************************************
 738  *  ParseCharMetrics
 739  *
 740  *  Parses the metrics line for a single glyph in an AFM file.  Returns FALSE on
 741  *  fatal error; sets *metrics to 'badmetrics' on non-fatal error.
 742  *
 743  */
 744 static const OLD_AFMMETRICS badmetrics =
 745 {
 746     INT_MAX,                                        /* C */
 747     LONG_MAX,                                       /* UV */
 748     FLT_MAX,                                        /* WX */
 749     NULL,                                           /* N */
 750     { FLT_MAX, FLT_MAX, FLT_MAX, FLT_MAX },         /* B */
 751     NULL                                            /* L */
 752 };
 753
 754 static BOOL ParseCharMetrics(LPSTR buffer, INT len, OLD_AFMMETRICS *metrics)
 755 {
 756     CHAR    *cp = buffer;
 757
 758     *metrics = badmetrics;
 759
 760     while (*cp != '\0')
 761     {
 762         while (isspace(*cp))
 763             ++cp;
 764
 765         switch(*cp)
 766         {
 767             case 'C':   if (ParseC(cp, metrics) == FALSE)
 768                             return FALSE;
 769                         break;
 770
 771             case 'W':   if (ParseW(cp, metrics) == FALSE)
 772                             return FALSE;
 773                         break;
 774
 775             case 'N':   if (ParseN(cp, metrics) == FALSE)
 776                             return FALSE;
 777                         break;
 778
 779             case 'B':   if (ParseB(cp, metrics) == FALSE)
 780                             return FALSE;
 781                         break;
 782         }
 783
 784         cp = strchr(cp, ';');
 785         if (cp == NULL)
 786         {
 787             WARN("No terminating semicolon\n");
 788             break;
 789         }
 790
 791         ++cp;
 792     }
 793
 794     if (metrics->C == INT_MAX || metrics->WX == FLT_MAX || metrics->N == NULL ||
 795             metrics->B.ury == FLT_MAX)
 796     {
 797         *metrics = badmetrics;
 798         return TRUE;
 799     }
 800
 801     return TRUE;
 802 }
 803
 804 /*******************************************************************************
 805  *  IsWinANSI
 806  *
 807  *  Checks whether Unicode value is part of Microsoft code page 1252
 808  *
 809  */
 810 static const LONG ansiChars[21] =
 811 {
 812     0x0152, 0x0153, 0x0160, 0x0161, 0x0178, 0x017d, 0x017e, 0x0192, 0x02c6,
 813     0x02c9, 0x02dc, 0x03bc, 0x2013, 0x2014, 0x2026, 0x2030, 0x2039, 0x203a,
 814     0x20ac, 0x2122, 0x2219
 815 };
 816
 817 static int cmpUV(const void *a, const void *b)
 818 {
 819     return (int)(*((const LONG *)a) - *((const LONG *)b));
 820 }
 821
 822 static inline BOOL IsWinANSI(LONG uv)
 823 {
 824     if ((0x0020 <= uv && uv <= 0x007e) || (0x00a0 <= uv && uv <= 0x00ff) ||
 825             (0x2018 <= uv && uv <= 0x201a) || (0x201c <= uv && uv <= 0x201e) ||
 826             (0x2020 <= uv && uv <= 0x2022))
 827         return TRUE;
 828
 829     if (bsearch(&uv, ansiChars, 21, sizeof(INT), cmpUV) != NULL)
 830         return TRUE;
 831
 832     return FALSE;
 833 }
 834
 835 /*******************************************************************************
 836  *  Unicodify
 837  *
 838  *  Determines Unicode value (UV) for each glyph, based on font encoding.
 839  *
 840  *      FontSpecific:   Usable encodings (0x20 - 0xff) are mapped into the
 841  *                      Unicode private use range U+F020 - U+F0FF.
 842  *
 843  *      other:          UV determined by glyph name, based on Adobe Glyph List.
 844  *
 845  *  Also does some font metric calculations that require UVs to be known.
 846  *
 847  */
 848 static int UnicodeGlyphByNameIndex(const void *a, const void *b)
 849 {
 850     return ((const UNICODEGLYPH *)a)->name->index -
 851             ((const UNICODEGLYPH *)b)->name->index;
 852 }
 853
 854 static VOID Unicodify(AFM *afm, OLD_AFMMETRICS *metrics)
 855 {
 856     INT     i;
 857
 858     if (strcmp(afm->EncodingScheme, "FontSpecific") == 0)
 859     {
 860         for (i = 0; i < afm->NumofMetrics; ++i)
 861         {
 862             if (metrics[i].C >= 0x20 && metrics[i].C <= 0xff)
 863             {
 864                 metrics[i].UV = metrics[i].C | 0xf000L;
 865             }
 866             else
 867             {
 868                 TRACE("Unencoded glyph '%s'\n", metrics[i].N->sz);
 869                 metrics[i].UV = -1L;
 870             }
 871         }
 872
 873         afm->WinMetrics.sAscender = (SHORT)Round(afm->FontBBox.ury);
 874         afm->WinMetrics.sDescender = (SHORT)Round(afm->FontBBox.lly);
 875     }
 876     else                                        /* non-FontSpecific encoding */
 877     {
 878         UNICODEGLYPH    ug, *p_ug;
 879
 880         PSDRV_IndexGlyphList();         /* for fast searching of glyph names */
 881
 882         afm->WinMetrics.sAscender = afm->WinMetrics.sDescender = 0;
 883
 884         for (i = 0; i < afm->NumofMetrics; ++i)
 885         {
 886             ug.name = metrics[i].N;
 887             p_ug = bsearch(&ug, PSDRV_AGLbyName, PSDRV_AGLbyNameSize,
 888                     sizeof(ug), UnicodeGlyphByNameIndex);
 889             if (p_ug == NULL)
 890             {
 891                 TRACE("Glyph '%s' not in Adobe Glyph List\n", ug.name->sz);
 892                 metrics[i].UV = -1L;
 893             }
 894             else
 895             {
 896                 metrics[i].UV = p_ug->UV;
 897
 898                 if (IsWinANSI(p_ug->UV))
 899                 {
 900                     SHORT   ury = (SHORT)Round(metrics[i].B.ury);
 901                     SHORT   lly = (SHORT)Round(metrics[i].B.lly);
 902
 903                     if (ury > afm->WinMetrics.sAscender)
 904                         afm->WinMetrics.sAscender = ury;
 905                     if (lly < afm->WinMetrics.sDescender)
 906                         afm->WinMetrics.sDescender = lly;
 907                 }
 908             }
 909         }
 910
 911         if (afm->WinMetrics.sAscender == 0)
 912             afm->WinMetrics.sAscender = (SHORT)Round(afm->FontBBox.ury);
 913         if (afm->WinMetrics.sDescender == 0)
 914             afm->WinMetrics.sDescender = (SHORT)Round(afm->FontBBox.lly);
 915     }
 916
 917     afm->WinMetrics.sLineGap =
 918             1150 - (afm->WinMetrics.sAscender - afm->WinMetrics.sDescender);
 919     if (afm->WinMetrics.sLineGap < 0)
 920         afm->WinMetrics.sLineGap = 0;
 921
 922     afm->WinMetrics.usWinAscent = (afm->WinMetrics.sAscender > 0) ?
 923             afm->WinMetrics.sAscender : 0;
 924     afm->WinMetrics.usWinDescent = (afm->WinMetrics.sDescender < 0) ?
 925             -(afm->WinMetrics.sDescender) : 0;
 926 }
 927
 928 /*******************************************************************************
 929  *  ReadCharMetrics
 930  *
 931  *  Reads metrics for all glyphs.  *p_metrics will be NULL on non-fatal error.
 932  *
 933  */
 934 static int OldAFMMetricsByUV(const void *a, const void *b)
 935 {
 936     return ((const OLD_AFMMETRICS *)a)->UV - ((const OLD_AFMMETRICS *)b)->UV;
 937 }
 938
 939 static BOOL ReadCharMetrics(FILE *file, CHAR buffer[], INT bufsize, AFM *afm,
 940         AFMMETRICS **p_metrics)
 941 {
 942     BOOL            retval, found;
 943     OLD_AFMMETRICS  *old_metrics, *encoded_metrics;
 944     AFMMETRICS      *metrics;
 945     INT             i, len;
 946
 947     retval = ReadInt(file, buffer, bufsize, "StartCharMetrics",
 948             &(afm->NumofMetrics), &found);
 949     if (retval == FALSE || found == FALSE)
 950     {
 951         *p_metrics = NULL;
 952         return retval;
 953     }
 954
 955     old_metrics = HeapAlloc(PSDRV_Heap, 0,
 956             afm->NumofMetrics * sizeof(*old_metrics));
 957     if (old_metrics == NULL)
 958         return FALSE;
 959
 960     for (i = 0; i < afm->NumofMetrics; ++i)
 961     {
 962         retval = ReadLine(file, buffer, bufsize, &len);
 963         if (retval == FALSE)
 964             goto cleanup_old_metrics;
 965
 966         if(len > 0)
 967         {
 968             retval = ParseCharMetrics(buffer, len, old_metrics + i);
 969             if (retval == FALSE || old_metrics[i].C == INT_MAX)
 970                 goto cleanup_old_metrics;
 971
 972             continue;
 973         }
 974
 975         switch (len)
 976         {
 977             case 0:         --i;
 978                             continue;
 979
 980             case INT_MIN:   WARN("Ignoring long line '%32s...'\n", buffer);
 981                             goto cleanup_old_metrics;       /* retval == TRUE */
 982
 983             case EOF:       WARN("Unexpected EOF\n");
 984                             goto cleanup_old_metrics;       /* retval == TRUE */
 985         }
 986     }
 987
 988     Unicodify(afm, old_metrics);    /* wait until glyph names have been read */
 989
 990     qsort(old_metrics, afm->NumofMetrics, sizeof(*old_metrics),
 991             OldAFMMetricsByUV);
 992
 993     for (i = 0; old_metrics[i].UV == -1; ++i);      /* count unencoded glyphs */
 994
 995     afm->NumofMetrics -= i;
 996     encoded_metrics = old_metrics + i;
 997
 998     afm->Metrics = *p_metrics = metrics = HeapAlloc(PSDRV_Heap, 0,
 999             afm->NumofMetrics * sizeof(*metrics));
1000     if (afm->Metrics == NULL)
1001         goto cleanup_old_metrics;                           /* retval == TRUE */
1002
1003     for (i = 0; i < afm->NumofMetrics; ++i, ++metrics, ++encoded_metrics)
1004     {
1005         metrics->C = encoded_metrics->C;
1006         metrics->UV = encoded_metrics->UV;
1007         metrics->WX = encoded_metrics->WX;
1008         metrics->N = encoded_metrics->N;
1009     }
1010
1011     HeapFree(PSDRV_Heap, 0, old_metrics);
1012
1013     afm->WinMetrics.sAvgCharWidth = PSDRV_CalcAvgCharWidth(afm);
1014
1015     return TRUE;
1016
1017     cleanup_old_metrics:                /* handle fatal or non-fatal errors */
1018         HeapFree(PSDRV_Heap, 0, old_metrics);
1019         *p_metrics = NULL;
1020         return retval;
1021 }
1022
1023 /*******************************************************************************
1024  *  BuildAFM
1025  *
1026  *  Builds the AFM for a PostScript font and adds it to the driver font list.
1027  *  Returns FALSE only on an unexpected error (memory allocation or I/O error).
1028  *
1029  */
1030 static BOOL BuildAFM(FILE *file)
1031 {
1032     CHAR        buffer[258];            /* allow for <cr>, <lf>, and <nul> */
1033     AFM         *afm;
1034     AFMMETRICS  *metrics;
1035     LPSTR       font_name, full_name, family_name, encoding_scheme;
1036     BOOL        retval, added;
1037
1038     retval = ReadFontMetrics(file, buffer, sizeof(buffer), &afm);
1039     if (retval == FALSE || afm == NULL)
1040         return retval;
1041
1042     retval = ReadString(file, buffer, sizeof(buffer), "FontName", &font_name);
1043     if (retval == FALSE || font_name == NULL)
1044         goto cleanup_afm;
1045
1046     retval = ReadString(file, buffer, sizeof(buffer), "FullName", &full_name);
1047     if (retval == FALSE || full_name == NULL)
1048         goto cleanup_font_name;
1049
1050     retval = ReadString(file, buffer, sizeof(buffer), "FamilyName",
1051             &family_name);
1052     if (retval == FALSE || family_name == NULL)
1053         goto cleanup_full_name;
1054
1055     retval = ReadString(file, buffer, sizeof(buffer), "EncodingScheme",
1056             &encoding_scheme);
1057     if (retval == FALSE || encoding_scheme == NULL)
1058         goto cleanup_family_name;
1059
1060     afm->FontName = font_name;
1061     afm->FullName = full_name;
1062     afm->FamilyName = family_name;
1063     afm->EncodingScheme = encoding_scheme;
1064
1065     retval = ReadCharMetrics(file, buffer, sizeof(buffer), afm, &metrics);
1066     if (retval == FALSE || metrics == FALSE)
1067         goto cleanup_encoding_scheme;
1068
1069     retval = PSDRV_AddAFMtoList(&PSDRV_AFMFontList, afm, &added);
1070     if (retval == FALSE || added == FALSE)
1071         goto cleanup_encoding_scheme;
1072
1073     return TRUE;
1074
1075     /* clean up after fatal or non-fatal errors */
1076
1077     cleanup_encoding_scheme:
1078         HeapFree(PSDRV_Heap, 0, encoding_scheme);
1079     cleanup_family_name:
1080         HeapFree(PSDRV_Heap, 0, family_name);
1081     cleanup_full_name:
1082         HeapFree(PSDRV_Heap, 0, full_name);
1083     cleanup_font_name:
1084         HeapFree(PSDRV_Heap, 0, font_name);
1085     cleanup_afm:
1086         HeapFree(PSDRV_Heap, 0, afm);
1087
1088     return retval;
1089 }
1090
1091 /*******************************************************************************
1092  *  ReadAFMFile
1093  *
1094  *  Reads font metrics from Type 1 AFM file.  Only returns FALSE for
1095  *  unexpected errors (memory allocation or I/O).
1096  *
1097  */
1098 static BOOL ReadAFMFile(LPCSTR filename)
1099 {
1100     FILE    *f;
1101     BOOL    retval;
1102
1103     TRACE("%s\n", filename);
1104
1105     f = fopen(filename, "r");
1106     if (f == NULL)
1107     {
1108         WARN("%s: %s\n", filename, strerror(errno));
1109         return TRUE;
1110     }
1111
1112     retval = BuildAFM(f);
1113
1114     fclose(f);
1115     return retval;
1116 }
1117
1118 /*******************************************************************************
1119  *  ReadAFMDir
1120  *
1121  *  Reads all Type 1 AFM files in a directory.
1122  *
1123  */
1124 static BOOL ReadAFMDir(LPCSTR dirname)
1125 {
1126     struct dirent   *dent;
1127     DIR             *dir;
1128     CHAR            filename[256];
1129
1130     dir = opendir(dirname);
1131     if (dir == NULL)
1132     {
1133         WARN("%s: %s\n", dirname, strerror(errno));
1134         return TRUE;
1135     }
1136
1137     while ((dent = readdir(dir)) != NULL)
1138     {
1139         CHAR    *file_extension = strchr(dent->d_name, '.');
1140         int     fn_len;
1141
1142         if (file_extension == NULL || strcasecmp(file_extension, ".afm") != 0)
1143             continue;
1144
1145         fn_len = snprintf(filename, 256, "%s/%s", dirname, dent->d_name);
1146         if (fn_len < 0 || fn_len > sizeof(filename) - 1)
1147         {
1148             WARN("Path '%s/%s' is too long\n", dirname, dent->d_name);
1149             continue;
1150         }
1151
1152         if (ReadAFMFile(filename) == FALSE)
1153         {
1154             closedir(dir);
1155             return FALSE;
1156         }
1157     }
1158
1159     closedir(dir);
1160     return TRUE;
1161 }
1162
1163 /*******************************************************************************
1164  *  PSDRV_GetType1Metrics
1165  *
1166  *  Reads font metrics from Type 1 AFM font files in directories listed in the
1167  *  [afmdirs] section of the Wine configuration file.
1168  *
1169  *  If this function fails (returns FALSE), the driver will fail to initialize
1170  *  and the driver heap will be destroyed, so it's not necessary to HeapFree
1171  *  everything in that event.
1172  *
1173  */
1174 BOOL PSDRV_GetType1Metrics(void)
1175 {
1176     static const WCHAR pathW[] = {'A','F','M','P','a','t','h',0};
1177     HKEY hkey;
1178     DWORD len;
1179     LPWSTR valueW;
1180     LPSTR valueA, ptr;
1181
1182     /* @@ Wine registry key: HKCU\Software\Wine\Fonts */
1183     if (RegOpenKeyA(HKEY_CURRENT_USER, "Software\\Wine\\Fonts", &hkey) != ERROR_SUCCESS)
1184         return TRUE;
1185
1186     if (RegQueryValueExW( hkey, pathW, NULL, NULL, NULL, &len ) == ERROR_SUCCESS)
1187     {
1188         len += sizeof(WCHAR);
1189         valueW = HeapAlloc( PSDRV_Heap, 0, len );
1190         if (RegQueryValueExW( hkey, pathW, NULL, NULL, (LPBYTE)valueW, &len ) == ERROR_SUCCESS)
1191         {
1192             len = WideCharToMultiByte( CP_UNIXCP, 0, valueW, -1, NULL, 0, NULL, NULL );
1193             valueA = HeapAlloc( PSDRV_Heap, 0, len );
1194             WideCharToMultiByte( CP_UNIXCP, 0, valueW, -1, valueA, len, NULL, NULL );
1195             TRACE( "got AFM font path %s\n", debugstr_a(valueA) );
1196             ptr = valueA;
1197             while (ptr)
1198             {
1199                 LPSTR next = strchr( ptr, ':' );
1200                 if (next) *next++ = 0;
1201                 if (!ReadAFMDir( ptr ))
1202                 {
1203                     RegCloseKey(hkey);
1204                     return FALSE;
1205                 }
1206                 ptr = next;
1207             }
1208             HeapFree( PSDRV_Heap, 0, valueA );
1209         }
1210         HeapFree( PSDRV_Heap, 0, valueW );
1211     }
1212
1213     RegCloseKey(hkey);
1214     return TRUE;
1215 }