dlls/gdi32/bidi.c

   1 /*
   2  * GDI BiDirectional handling
   3  *
   4  * Copyright 2003 Shachar Shemesh
   5  * Copyright 2007 Maarten Lankhorst
   6  * Copyright 2010 CodeWeavers, Aric Stewart
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  21  *
  22  * Code derived from the modified reference implementation
  23  * that was found in revision 17 of http://unicode.org/reports/tr9/
  24  * "Unicode Standard Annex #9: THE BIDIRECTIONAL ALGORITHM"
  25  *
  26  * -- Copyright (C) 1999-2005, ASMUS, Inc.
  27  *
  28  * Permission is hereby granted, free of charge, to any person obtaining a
  29  * copy of the Unicode data files and any associated documentation (the
  30  * "Data Files") or Unicode software and any associated documentation (the
  31  * "Software") to deal in the Data Files or Software without restriction,
  32  * including without limitation the rights to use, copy, modify, merge,
  33  * publish, distribute, and/or sell copies of the Data Files or Software,
  34  * and to permit persons to whom the Data Files or Software are furnished
  35  * to do so, provided that (a) the above copyright notice(s) and this
  36  * permission notice appear with all copies of the Data Files or Software,
  37  * (b) both the above copyright notice(s) and this permission notice appear
  38  * in associated documentation, and (c) there is clear notice in each
  39  * modified Data File or in the Software as well as in the documentation
  40  * associated with the Data File(s) or Software that the data or software
  41  * has been modified.
  42  */
  43
  44 #include "config.h"
  45
  46 #include <stdarg.h>
  47 #include "windef.h"
  48 #include "winbase.h"
  49 #include "wingdi.h"
  50 #include "winnls.h"
  51 #include "usp10.h"
  52 #include "wine/unicode.h"
  53 #include "wine/debug.h"
  54 #include "gdi_private.h"
  55
  56 WINE_DEFAULT_DEBUG_CHANNEL(bidi);
  57
  58 /* HELPER FUNCTIONS AND DECLARATIONS */
  59
  60 #define odd(x) ((x) & 1)
  61
  62 /*------------------------------------------------------------------------
  63     Bidirectional Character Types
  64
  65     as defined by the Unicode Bidirectional Algorithm Table 3-7.
  66
  67     Note:
  68
  69       The list of bidirectional character types here is not grouped the
  70       same way as the table 3-7, since the numberic values for the types
  71       are chosen to keep the state and action tables compact.
  72 ------------------------------------------------------------------------*/
  73 enum directions
  74 {
  75     /* input types */
  76              /* ON MUST be zero, code relies on ON = N = 0 */
  77     ON = 0,  /* Other Neutral */
  78     L,       /* Left Letter */
  79     R,       /* Right Letter */
  80     AN,      /* Arabic Number */
  81     EN,      /* European Number */
  82     AL,      /* Arabic Letter (Right-to-left) */
  83     NSM,     /* Non-spacing Mark */
  84     CS,      /* Common Separator */
  85     ES,      /* European Separator */
  86     ET,      /* European Terminator (post/prefix e.g. $ and %) */
  87
  88     /* resolved types */
  89     BN,      /* Boundary neutral (type of RLE etc after explicit levels) */
  90
  91     /* input types, */
  92     S,       /* Segment Separator (TAB)        // used only in L1 */
  93     WS,      /* White space                    // used only in L1 */
  94     B,       /* Paragraph Separator (aka as PS) */
  95
  96     /* types for explicit controls */
  97     RLO,     /* these are used only in X1-X9 */
  98     RLE,
  99     LRO,
 100     LRE,
 101     PDF,
 102
 103     /* resolved types, also resolved directions */
 104     N = ON,  /* alias, where ON, WS and S are treated the same */
 105 };
 106
 107 /* HELPER FUNCTIONS */
 108
 109 /* Convert the libwine information to the direction enum */
 110 static void classify(LPCWSTR lpString, WORD *chartype, DWORD uCount)
 111 {
 112     static const enum directions dir_map[16] =
 113     {
 114         L,  /* unassigned defaults to L */
 115         L,
 116         R,
 117         EN,
 118         ES,
 119         ET,
 120         AN,
 121         CS,
 122         B,
 123         S,
 124         WS,
 125         ON,
 126         AL,
 127         NSM,
 128         BN,
 129         PDF  /* also LRE, LRO, RLE, RLO */
 130     };
 131
 132     unsigned i;
 133
 134     for (i = 0; i < uCount; ++i)
 135     {
 136         chartype[i] = dir_map[get_char_typeW(lpString[i]) >> 12];
 137         if (chartype[i] == PDF)
 138         {
 139             switch (lpString[i])
 140             {
 141             case 0x202A: chartype[i] = LRE; break;
 142             case 0x202B: chartype[i] = RLE; break;
 143             case 0x202C: chartype[i] = PDF; break;
 144             case 0x202D: chartype[i] = LRO; break;
 145             case 0x202E: chartype[i] = RLO; break;
 146             }
 147         }
 148     }
 149 }
 150
 151 /* Set a run of cval values at locations all prior to, but not including */
 152 /* iStart, to the new value nval. */
 153 static void SetDeferredRun(BYTE *pval, int cval, int iStart, int nval)
 154 {
 155     int i = iStart - 1;
 156     for (; i >= iStart - cval; i--)
 157     {
 158         pval[i] = nval;
 159     }
 160 }
 161
 162 /* THE PARAGRAPH LEVEL */
 163
 164 /*------------------------------------------------------------------------
 165     Function: resolveParagraphs
 166
 167     Resolves the input strings into blocks over which the algorithm
 168     is then applied.
 169
 170     Implements Rule P1 of the Unicode Bidi Algorithm
 171
 172     Input: Text string
 173            Character count
 174
 175     Output: revised character count
 176
 177     Note:    This is a very simplistic function. In effect it restricts
 178             the action of the algorithm to the first paragraph in the input
 179             where a paragraph ends at the end of the first block separator
 180             or at the end of the input text.
 181
 182 ------------------------------------------------------------------------*/
 183
 184 static int resolveParagraphs(WORD *types, int cch)
 185 {
 186     /* skip characters not of type B */
 187     int ich = 0;
 188     for(; ich < cch && types[ich] != B; ich++);
 189     /* stop after first B, make it a BN for use in the next steps */
 190     if (ich < cch && types[ich] == B)
 191         types[ich++] = BN;
 192     return ich;
 193 }
 194
 195 /* REORDER */
 196 /*------------------------------------------------------------------------
 197     Function: resolveLines
 198
 199     Breaks a paragraph into lines
 200
 201     Input:  Array of line break flags
 202             Character count
 203     In/Out: Array of characters
 204
 205     Returns the count of characters on the first line
 206
 207     Note: This function only breaks lines at hard line breaks. Other
 208     line breaks can be passed in. If pbrk[n] is TRUE, then a break
 209     occurs after the character in pszInput[n]. Breaks before the first
 210     character are not allowed.
 211 ------------------------------------------------------------------------*/
 212 static int resolveLines(LPCWSTR pszInput, const BOOL * pbrk, int cch)
 213 {
 214     /* skip characters not of type LS */
 215     int ich = 0;
 216     for(; ich < cch; ich++)
 217     {
 218         if (pszInput[ich] == (WCHAR)'\n' || (pbrk && pbrk[ich]))
 219         {
 220             ich++;
 221             break;
 222         }
 223     }
 224
 225     return ich;
 226 }
 227
 228 /*------------------------------------------------------------------------
 229     Function: resolveWhiteSpace
 230
 231     Resolves levels for WS and S
 232     Implements rule L1 of the Unicode bidi Algorithm.
 233
 234     Input:  Base embedding level
 235             Character count
 236             Array of direction classes (for one line of text)
 237
 238     In/Out: Array of embedding levels (for one line of text)
 239
 240     Note: this should be applied a line at a time. The default driver
 241           code supplied in this file assumes a single line of text; for
 242           a real implementation, cch and the initial pointer values
 243           would have to be adjusted.
 244 ------------------------------------------------------------------------*/
 245 static void resolveWhitespace(int baselevel, const WORD *pcls, BYTE *plevel, int cch)
 246 {
 247     int cchrun = 0;
 248     BYTE oldlevel = baselevel;
 249
 250     int ich = 0;
 251     for (; ich < cch; ich++)
 252     {
 253         switch(pcls[ich])
 254         {
 255         default:
 256             cchrun = 0; /* any other character breaks the run */
 257             break;
 258         case WS:
 259             cchrun++;
 260             break;
 261
 262         case RLE:
 263         case LRE:
 264         case LRO:
 265         case RLO:
 266         case PDF:
 267         case BN:
 268             plevel[ich] = oldlevel;
 269             cchrun++;
 270             break;
 271
 272         case S:
 273         case B:
 274             /* reset levels for WS before eot */
 275             SetDeferredRun(plevel, cchrun, ich, baselevel);
 276             cchrun = 0;
 277             plevel[ich] = baselevel;
 278             break;
 279         }
 280         oldlevel = plevel[ich];
 281     }
 282     /* reset level before eot */
 283     SetDeferredRun(plevel, cchrun, ich, baselevel);
 284 }
 285
 286 /*------------------------------------------------------------------------
 287     Function: BidiLines
 288
 289     Implements the Line-by-Line phases of the Unicode Bidi Algorithm
 290
 291       Input:     Count of characters
 292                  Array of character directions
 293
 294     Inp/Out: Input text
 295              Array of levels
 296
 297 ------------------------------------------------------------------------*/
 298 static void BidiLines(int baselevel, LPWSTR pszOutLine, LPCWSTR pszLine, const WORD * pclsLine,
 299                       BYTE * plevelLine, int cchPara, const BOOL * pbrk)
 300 {
 301     int cchLine = 0;
 302     int done = 0;
 303     int *run;
 304
 305     run = HeapAlloc(GetProcessHeap(), 0, cchPara * sizeof(int));
 306     if (!run)
 307     {
 308         WARN("Out of memory\n");
 309         return;
 310     }
 311
 312     do
 313     {
 314         /* break lines at LS */
 315         cchLine = resolveLines(pszLine, pbrk, cchPara);
 316
 317         /* resolve whitespace */
 318         resolveWhitespace(baselevel, pclsLine, plevelLine, cchLine);
 319
 320         if (pszOutLine)
 321         {
 322             int i;
 323             /* reorder each line in place */
 324             ScriptLayout(cchLine, plevelLine, NULL, run);
 325             for (i = 0; i < cchLine; i++)
 326                 pszOutLine[done+run[i]] = pszLine[i];
 327         }
 328
 329         pszLine += cchLine;
 330         plevelLine += cchLine;
 331         pbrk += pbrk ? cchLine : 0;
 332         pclsLine += cchLine;
 333         cchPara -= cchLine;
 334         done += cchLine;
 335
 336     } while (cchPara);
 337
 338     HeapFree(GetProcessHeap(), 0, run);
 339 }
 340
 341 /*************************************************************
 342  *    BIDI_Reorder
 343  *
 344  *     Returns TRUE if reordering was required and done.
 345  */
 346 BOOL BIDI_Reorder(
 347                 HDC hDC,        /*[in] Display DC */
 348                 LPCWSTR lpString,       /* [in] The string for which information is to be returned */
 349                 INT uCount,     /* [in] Number of WCHARs in string. */
 350                 DWORD dwFlags,  /* [in] GetCharacterPlacement compatible flags specifying how to process the string */
 351                 DWORD dwWineGCP_Flags,       /* [in] Wine internal flags - Force paragraph direction */
 352                 LPWSTR lpOutString, /* [out] Reordered string */
 353                 INT uCountOut,  /* [in] Size of output buffer */
 354                 UINT *lpOrder, /* [out] Logical -> Visual order map */
 355                 WORD **lpGlyphs, /* [out] reordered, mirrored, shaped glyphs to display */
 356                 INT *cGlyphs /* [out] number of glyphs generated */
 357     )
 358 {
 359     WORD *chartype;
 360     BYTE *levels;
 361     unsigned i, done, glyph_i;
 362     BOOL is_complex;
 363
 364     int maxItems;
 365     int nItems;
 366     SCRIPT_CONTROL Control;
 367     SCRIPT_STATE State;
 368     SCRIPT_ITEM *pItems;
 369     HRESULT res;
 370     SCRIPT_CACHE psc = NULL;
 371     WORD *run_glyphs = NULL;
 372     WORD *pwLogClust = NULL;
 373     SCRIPT_VISATTR *psva = NULL;
 374     DWORD cMaxGlyphs = 0;
 375     BOOL  doGlyphs = TRUE;
 376
 377     TRACE("%s, %d, 0x%08x lpOutString=%p, lpOrder=%p\n",
 378           debugstr_wn(lpString, uCount), uCount, dwFlags,
 379           lpOutString, lpOrder);
 380
 381     memset(&Control, 0, sizeof(Control));
 382     memset(&State, 0, sizeof(State));
 383     if (lpGlyphs)
 384         *lpGlyphs = NULL;
 385
 386     if (!(dwFlags & GCP_REORDER))
 387     {
 388         FIXME("Asked to reorder without reorder flag set\n");
 389         return FALSE;
 390     }
 391
 392     if (lpOutString && uCountOut < uCount)
 393     {
 394         FIXME("lpOutString too small\n");
 395         return FALSE;
 396     }
 397
 398     chartype = HeapAlloc(GetProcessHeap(), 0, uCount * sizeof(WORD));
 399     if (!chartype)
 400     {
 401         WARN("Out of memory\n");
 402         return FALSE;
 403     }
 404
 405     if (lpOutString)
 406         memcpy(lpOutString, lpString, uCount * sizeof(WCHAR));
 407
 408     is_complex = FALSE;
 409     for (i = 0; i < uCount && !is_complex; i++)
 410     {
 411         if ((lpString[i] >= 0x900 && lpString[i] <= 0xfff) ||
 412             (lpString[i] >= 0x1cd0 && lpString[i] <= 0x1cff) ||
 413             (lpString[i] >= 0xa840 && lpString[i] <= 0xa8ff))
 414             is_complex = TRUE;
 415     }
 416
 417     /* Verify reordering will be required */
 418     if ((WINE_GCPW_FORCE_RTL == (dwWineGCP_Flags&WINE_GCPW_DIR_MASK)) ||
 419         ((dwWineGCP_Flags&WINE_GCPW_DIR_MASK) == WINE_GCPW_LOOSE_RTL))
 420         State.uBidiLevel = 1;
 421     else if (!is_complex)
 422     {
 423         done = 1;
 424         classify(lpString, chartype, uCount);
 425         for (i = 0; i < uCount; i++)
 426             switch (chartype[i])
 427             {
 428                 case R:
 429                 case AL:
 430                 case RLE:
 431                 case RLO:
 432                     done = 0;
 433                     break;
 434             }
 435         if (done)
 436         {
 437             HeapFree(GetProcessHeap(), 0, chartype);
 438             if (lpOrder)
 439             {
 440                 for (i = 0; i < uCount; i++)
 441                     lpOrder[i] = i;
 442             }
 443             return TRUE;
 444         }
 445     }
 446
 447     levels = HeapAlloc(GetProcessHeap(), 0, uCount * sizeof(BYTE));
 448     if (!levels)
 449     {
 450         WARN("Out of memory\n");
 451         HeapFree(GetProcessHeap(), 0, chartype);
 452         return FALSE;
 453     }
 454
 455     maxItems = 5;
 456     pItems = HeapAlloc(GetProcessHeap(),0, maxItems * sizeof(SCRIPT_ITEM));
 457     if (!pItems)
 458     {
 459         WARN("Out of memory\n");
 460         HeapFree(GetProcessHeap(), 0, chartype);
 461         HeapFree(GetProcessHeap(), 0, levels);
 462         return FALSE;
 463     }
 464
 465     if (lpGlyphs)
 466     {
 467         cMaxGlyphs = 1.5 * uCount + 16;
 468         run_glyphs = HeapAlloc(GetProcessHeap(),0,sizeof(WORD) * cMaxGlyphs);
 469         if (!run_glyphs)
 470         {
 471             WARN("Out of memory\n");
 472             HeapFree(GetProcessHeap(), 0, chartype);
 473             HeapFree(GetProcessHeap(), 0, levels);
 474             HeapFree(GetProcessHeap(), 0, pItems);
 475             return FALSE;
 476         }
 477         pwLogClust = HeapAlloc(GetProcessHeap(),0,sizeof(WORD) * uCount);
 478         if (!pwLogClust)
 479         {
 480             WARN("Out of memory\n");
 481             HeapFree(GetProcessHeap(), 0, chartype);
 482             HeapFree(GetProcessHeap(), 0, levels);
 483             HeapFree(GetProcessHeap(), 0, pItems);
 484             HeapFree(GetProcessHeap(), 0, run_glyphs);
 485             return FALSE;
 486         }
 487         psva = HeapAlloc(GetProcessHeap(),0,sizeof(SCRIPT_VISATTR) * uCount);
 488         if (!psva)
 489         {
 490             WARN("Out of memory\n");
 491             HeapFree(GetProcessHeap(), 0, chartype);
 492             HeapFree(GetProcessHeap(), 0, levels);
 493             HeapFree(GetProcessHeap(), 0, pItems);
 494             HeapFree(GetProcessHeap(), 0, run_glyphs);
 495             HeapFree(GetProcessHeap(), 0, pwLogClust);
 496             return FALSE;
 497         }
 498     }
 499
 500     done = 0;
 501     glyph_i = 0;
 502     while (done < uCount)
 503     {
 504         unsigned j;
 505         classify(lpString + done, chartype, uCount - done);
 506         /* limit text to first block */
 507         i = resolveParagraphs(chartype, uCount - done);
 508         for (j = 0; j < i; ++j)
 509             switch(chartype[j])
 510             {
 511                 case B:
 512                 case S:
 513                 case WS:
 514                 case ON: chartype[j] = N;
 515                 default: continue;
 516             }
 517
 518         if ((dwWineGCP_Flags&WINE_GCPW_DIR_MASK) == WINE_GCPW_LOOSE_RTL)
 519             State.uBidiLevel = 1;
 520         else if ((dwWineGCP_Flags&WINE_GCPW_DIR_MASK) == WINE_GCPW_LOOSE_LTR)
 521             State.uBidiLevel = 0;
 522
 523         if (dwWineGCP_Flags & WINE_GCPW_LOOSE_MASK)
 524         {
 525             for (j = 0; j < i; ++j)
 526                 if (chartype[j] == L)
 527                 {
 528                     State.uBidiLevel = 0;
 529                     break;
 530                 }
 531                 else if (chartype[j] == R || chartype[j] == AL)
 532                 {
 533                     State.uBidiLevel = 1;
 534                     break;
 535                 }
 536         }
 537
 538         res = ScriptItemize(lpString + done, i, maxItems, &Control, &State, pItems, &nItems);
 539         while (res == E_OUTOFMEMORY)
 540         {
 541             maxItems = maxItems * 2;
 542             pItems = HeapReAlloc(GetProcessHeap(), 0, pItems, sizeof(SCRIPT_ITEM) * maxItems);
 543             if (!pItems)
 544             {
 545                 WARN("Out of memory\n");
 546                 HeapFree(GetProcessHeap(), 0, chartype);
 547                 HeapFree(GetProcessHeap(), 0, levels);
 548                 return FALSE;
 549             }
 550             res = ScriptItemize(lpString + done, i, maxItems, &Control, &State, pItems, &nItems);
 551         }
 552
 553         if (lpOutString || lpOrder)
 554             for (j = 0; j < nItems; j++)
 555             {
 556                 int k;
 557                 for (k = pItems[j].iCharPos; k < pItems[j+1].iCharPos; k++)
 558                     levels[k] = pItems[j].a.s.uBidiLevel;
 559             }
 560
 561         if (lpOutString)
 562         {
 563             /* assign directional types again, but for WS, S this time */
 564             classify(lpString + done, chartype, i);
 565
 566             BidiLines(State.uBidiLevel, lpOutString + done, lpString + done,
 567                         chartype, levels, i, 0);
 568         }
 569
 570         if (lpOrder)
 571         {
 572             int k, lastgood;
 573             for (j = lastgood = 0; j < i; ++j)
 574                 if (levels[j] != levels[lastgood])
 575                 {
 576                     --j;
 577                     if (odd(levels[lastgood]))
 578                         for (k = j; k >= lastgood; --k)
 579                             lpOrder[done + k] = done + j - k;
 580                     else
 581                         for (k = lastgood; k <= j; ++k)
 582                             lpOrder[done + k] = done + k;
 583                     lastgood = ++j;
 584                 }
 585             if (odd(levels[lastgood]))
 586                 for (k = j - 1; k >= lastgood; --k)
 587                     lpOrder[done + k] = done + j - 1 - k;
 588             else
 589                 for (k = lastgood; k < j; ++k)
 590                     lpOrder[done + k] = done + k;
 591         }
 592
 593         if (lpGlyphs && doGlyphs)
 594         {
 595             BYTE runOrder[maxItems];
 596             int visOrder[maxItems];
 597             SCRIPT_ITEM *curItem;
 598
 599             for (j = 0; j < nItems; j++)
 600                 runOrder[j] = pItems[j].a.s.uBidiLevel;
 601
 602             ScriptLayout(nItems, runOrder, visOrder, NULL);
 603
 604             for (j = 0; j < nItems; j++)
 605             {
 606                 int k;
 607                 int cChars,cOutGlyphs;
 608                 curItem = &pItems[visOrder[j]];
 609
 610                 cChars = pItems[visOrder[j]+1].iCharPos - curItem->iCharPos;
 611
 612                 res = ScriptShape(hDC, &psc, lpString + done + curItem->iCharPos, cChars, cMaxGlyphs, &curItem->a, run_glyphs, pwLogClust, psva, &cOutGlyphs);
 613                 while (res == E_OUTOFMEMORY)
 614                 {
 615                     cMaxGlyphs *= 2;
 616                     run_glyphs = HeapReAlloc(GetProcessHeap(), 0, run_glyphs, sizeof(WORD) * cMaxGlyphs);
 617                     if (!run_glyphs)
 618                     {
 619                         WARN("Out of memory\n");
 620                         HeapFree(GetProcessHeap(), 0, chartype);
 621                         HeapFree(GetProcessHeap(), 0, levels);
 622                         HeapFree(GetProcessHeap(), 0, pItems);
 623                         HeapFree(GetProcessHeap(), 0, psva);
 624                         HeapFree(GetProcessHeap(), 0, pwLogClust);
 625                         HeapFree(GetProcessHeap(), 0, *lpGlyphs);
 626                         ScriptFreeCache(&psc);
 627                         *lpGlyphs = NULL;
 628                         return FALSE;
 629                     }
 630                     res = ScriptShape(hDC, &psc, lpString + done + curItem->iCharPos, cChars, cMaxGlyphs, &curItem->a, run_glyphs, pwLogClust, psva, &cOutGlyphs);
 631                 }
 632                 if (res)
 633                 {
 634                     if (res == USP_E_SCRIPT_NOT_IN_FONT)
 635                         TRACE("Unable to shape with currently selected font\n");
 636                     else
 637                         FIXME("Unable to shape string (%x)\n",res);
 638                     j = nItems;
 639                     doGlyphs = FALSE;
 640                     HeapFree(GetProcessHeap(), 0, *lpGlyphs);
 641                     *lpGlyphs = NULL;
 642                 }
 643                 else
 644                 {
 645                     if (*lpGlyphs)
 646                         *lpGlyphs = HeapReAlloc(GetProcessHeap(), 0, *lpGlyphs, sizeof(WORD) * (glyph_i + cOutGlyphs));
 647                    else
 648                         *lpGlyphs = HeapAlloc(GetProcessHeap(), 0, sizeof(WORD) * (glyph_i + cOutGlyphs));
 649                     for (k = 0; k < cOutGlyphs; k++)
 650                         (*lpGlyphs)[glyph_i+k] = run_glyphs[k];
 651                     glyph_i += cOutGlyphs;
 652                 }
 653             }
 654         }
 655
 656         done += i;
 657     }
 658     if (cGlyphs)
 659         *cGlyphs = glyph_i;
 660
 661     HeapFree(GetProcessHeap(), 0, chartype);
 662     HeapFree(GetProcessHeap(), 0, levels);
 663     HeapFree(GetProcessHeap(), 0, pItems);
 664     HeapFree(GetProcessHeap(), 0, run_glyphs);
 665     HeapFree(GetProcessHeap(), 0, pwLogClust);
 666     HeapFree(GetProcessHeap(), 0, psva);
 667     ScriptFreeCache(&psc);
 668     return TRUE;
 669 }