dll/win32/usp10/opentype.c

   1 /*
   2  * Opentype font interfaces for the Uniscribe Script Processor (usp10.dll)
   3  *
   4  * Copyright 2012 CodeWeavers, Aric Stewart
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  *
  20  */
  21
  22 #include "usp10_internal.h"
  23
  24 #include <winternl.h>
  25
  26 WINE_DEFAULT_DEBUG_CHANNEL(uniscribe);
  27
  28 #ifdef WORDS_BIGENDIAN
  29 #define GET_BE_WORD(x) (x)
  30 #define GET_BE_DWORD(x) (x)
  31 #else
  32 #define GET_BE_WORD(x) RtlUshortByteSwap(x)
  33 #define GET_BE_DWORD(x) RtlUlongByteSwap(x)
  34 #endif
  35
  36 #define round(x) (((x) < 0) ? (int)((x) - 0.5) : (int)((x) + 0.5))
  37
  38 /* These are all structures needed for the cmap format 12 table */
  39 #define CMAP_TAG MS_MAKE_TAG('c', 'm', 'a', 'p')
  40
  41 typedef struct {
  42     WORD platformID;
  43     WORD encodingID;
  44     DWORD offset;
  45 } CMAP_EncodingRecord;
  46
  47 typedef struct {
  48     WORD version;
  49     WORD numTables;
  50     CMAP_EncodingRecord tables[1];
  51 } CMAP_Header;
  52
  53 typedef struct {
  54     DWORD startCharCode;
  55     DWORD endCharCode;
  56     DWORD startGlyphID;
  57 } CMAP_SegmentedCoverage_group;
  58
  59 typedef struct {
  60     WORD format;
  61     WORD reserved;
  62     DWORD length;
  63     DWORD language;
  64     DWORD nGroups;
  65     CMAP_SegmentedCoverage_group groups[1];
  66 } CMAP_SegmentedCoverage;
  67
  68 /* These are all structures needed for the GDEF table */
  69 enum {BaseGlyph=1, LigatureGlyph, MarkGlyph, ComponentGlyph};
  70
  71 typedef struct {
  72     DWORD Version;
  73     WORD GlyphClassDef;
  74     WORD AttachList;
  75     WORD LigCaretList;
  76     WORD MarkAttachClassDef;
  77 } GDEF_Header;
  78
  79 typedef struct {
  80     WORD ClassFormat;
  81     WORD StartGlyph;
  82     WORD GlyphCount;
  83     WORD ClassValueArray[1];
  84 } OT_ClassDefFormat1;
  85
  86 typedef struct {
  87     WORD Start;
  88     WORD End;
  89     WORD Class;
  90 } OT_ClassRangeRecord;
  91
  92 typedef struct {
  93     WORD ClassFormat;
  94     WORD ClassRangeCount;
  95     OT_ClassRangeRecord ClassRangeRecord[1];
  96 } OT_ClassDefFormat2;
  97
  98 /* These are all structures needed for the GSUB table */
  99
 100 typedef struct {
 101     DWORD version;
 102     WORD ScriptList;
 103     WORD FeatureList;
 104     WORD LookupList;
 105 } GSUB_Header;
 106
 107 typedef struct {
 108     CHAR ScriptTag[4];
 109     WORD Script;
 110 } OT_ScriptRecord;
 111
 112 typedef struct {
 113     WORD ScriptCount;
 114     OT_ScriptRecord ScriptRecord[1];
 115 } OT_ScriptList;
 116
 117 typedef struct {
 118     CHAR LangSysTag[4];
 119     WORD LangSys;
 120 } OT_LangSysRecord;
 121
 122 typedef struct {
 123     WORD DefaultLangSys;
 124     WORD LangSysCount;
 125     OT_LangSysRecord LangSysRecord[1];
 126 } OT_Script;
 127
 128 typedef struct {
 129     WORD LookupOrder; /* Reserved */
 130     WORD ReqFeatureIndex;
 131     WORD FeatureCount;
 132     WORD FeatureIndex[1];
 133 } OT_LangSys;
 134
 135 typedef struct {
 136     CHAR FeatureTag[4];
 137     WORD Feature;
 138 } OT_FeatureRecord;
 139
 140 typedef struct {
 141     WORD FeatureCount;
 142     OT_FeatureRecord FeatureRecord[1];
 143 } OT_FeatureList;
 144
 145 typedef struct {
 146     WORD FeatureParams; /* Reserved */
 147     WORD LookupCount;
 148     WORD LookupListIndex[1];
 149 } OT_Feature;
 150
 151 typedef struct {
 152     WORD LookupCount;
 153     WORD Lookup[1];
 154 } OT_LookupList;
 155
 156 typedef struct {
 157     WORD LookupType;
 158     WORD LookupFlag;
 159     WORD SubTableCount;
 160     WORD SubTable[1];
 161 } OT_LookupTable;
 162
 163 typedef struct {
 164     WORD CoverageFormat;
 165     WORD GlyphCount;
 166     WORD GlyphArray[1];
 167 } OT_CoverageFormat1;
 168
 169 typedef struct {
 170     WORD Start;
 171     WORD End;
 172     WORD StartCoverageIndex;
 173 } OT_RangeRecord;
 174
 175 typedef struct {
 176     WORD CoverageFormat;
 177     WORD RangeCount;
 178     OT_RangeRecord RangeRecord[1];
 179 } OT_CoverageFormat2;
 180
 181 typedef struct {
 182     WORD SubstFormat; /* = 1 */
 183     WORD Coverage;
 184     WORD DeltaGlyphID;
 185 } GSUB_SingleSubstFormat1;
 186
 187 typedef struct {
 188     WORD SubstFormat; /* = 2 */
 189     WORD Coverage;
 190     WORD GlyphCount;
 191     WORD Substitute[1];
 192 }GSUB_SingleSubstFormat2;
 193
 194 typedef struct {
 195     WORD SubstFormat; /* = 1 */
 196     WORD Coverage;
 197     WORD SequenceCount;
 198     WORD Sequence[1];
 199 }GSUB_MultipleSubstFormat1;
 200
 201 typedef struct {
 202     WORD GlyphCount;
 203     WORD Substitute[1];
 204 }GSUB_Sequence;
 205
 206 typedef struct {
 207     WORD SubstFormat; /* = 1 */
 208     WORD Coverage;
 209     WORD LigSetCount;
 210     WORD LigatureSet[1];
 211 }GSUB_LigatureSubstFormat1;
 212
 213 typedef struct {
 214     WORD LigatureCount;
 215     WORD Ligature[1];
 216 }GSUB_LigatureSet;
 217
 218 typedef struct{
 219     WORD LigGlyph;
 220     WORD CompCount;
 221     WORD Component[1];
 222 }GSUB_Ligature;
 223
 224 typedef struct{
 225     WORD SequenceIndex;
 226     WORD LookupListIndex;
 227
 228 }GSUB_SubstLookupRecord;
 229
 230 typedef struct{
 231     WORD SubstFormat; /* = 1 */
 232     WORD Coverage;
 233     WORD ChainSubRuleSetCount;
 234     WORD ChainSubRuleSet[1];
 235 }GSUB_ChainContextSubstFormat1;
 236
 237 typedef struct {
 238     WORD SubstFormat; /* = 3 */
 239     WORD BacktrackGlyphCount;
 240     WORD Coverage[1];
 241 }GSUB_ChainContextSubstFormat3_1;
 242
 243 typedef struct{
 244     WORD InputGlyphCount;
 245     WORD Coverage[1];
 246 }GSUB_ChainContextSubstFormat3_2;
 247
 248 typedef struct{
 249     WORD LookaheadGlyphCount;
 250     WORD Coverage[1];
 251 }GSUB_ChainContextSubstFormat3_3;
 252
 253 typedef struct{
 254     WORD SubstCount;
 255     GSUB_SubstLookupRecord SubstLookupRecord[1];
 256 }GSUB_ChainContextSubstFormat3_4;
 257
 258 typedef struct {
 259     WORD SubstFormat; /* = 1 */
 260     WORD Coverage;
 261     WORD AlternateSetCount;
 262     WORD AlternateSet[1];
 263 } GSUB_AlternateSubstFormat1;
 264
 265 typedef struct{
 266     WORD GlyphCount;
 267     WORD Alternate[1];
 268 } GSUB_AlternateSet;
 269
 270 /* These are all structures needed for the GPOS table */
 271
 272 typedef struct {
 273     DWORD version;
 274     WORD ScriptList;
 275     WORD FeatureList;
 276     WORD LookupList;
 277 } GPOS_Header;
 278
 279 typedef struct {
 280     WORD StartSize;
 281     WORD EndSize;
 282     WORD DeltaFormat;
 283     WORD DeltaValue[1];
 284 } OT_DeviceTable;
 285
 286 typedef struct {
 287     WORD AnchorFormat;
 288     WORD XCoordinate;
 289     WORD YCoordinate;
 290 } GPOS_AnchorFormat1;
 291
 292 typedef struct {
 293     WORD AnchorFormat;
 294     WORD XCoordinate;
 295     WORD YCoordinate;
 296     WORD AnchorPoint;
 297 } GPOS_AnchorFormat2;
 298
 299 typedef struct {
 300     WORD AnchorFormat;
 301     WORD XCoordinate;
 302     WORD YCoordinate;
 303     WORD XDeviceTable;
 304     WORD YDeviceTable;
 305 } GPOS_AnchorFormat3;
 306
 307 typedef struct {
 308     WORD XPlacement;
 309     WORD YPlacement;
 310     WORD XAdvance;
 311     WORD YAdvance;
 312     WORD XPlaDevice;
 313     WORD YPlaDevice;
 314     WORD XAdvDevice;
 315     WORD YAdvDevice;
 316 } GPOS_ValueRecord;
 317
 318 typedef struct {
 319     WORD PosFormat;
 320     WORD Coverage;
 321     WORD ValueFormat;
 322     WORD Value[1];
 323 } GPOS_SinglePosFormat1;
 324
 325 typedef struct {
 326     WORD PosFormat;
 327     WORD Coverage;
 328     WORD ValueFormat;
 329     WORD ValueCount;
 330     WORD Value[1];
 331 } GPOS_SinglePosFormat2;
 332
 333 typedef struct {
 334     WORD PosFormat;
 335     WORD Coverage;
 336     WORD ValueFormat1;
 337     WORD ValueFormat2;
 338     WORD PairSetCount;
 339     WORD PairSetOffset[1];
 340 } GPOS_PairPosFormat1;
 341
 342 typedef struct {
 343     WORD PosFormat;
 344     WORD Coverage;
 345     WORD ValueFormat1;
 346     WORD ValueFormat2;
 347     WORD ClassDef1;
 348     WORD ClassDef2;
 349     WORD Class1Count;
 350     WORD Class2Count;
 351     WORD Class1Record[1];
 352 } GPOS_PairPosFormat2;
 353
 354 typedef struct {
 355     WORD SecondGlyph;
 356     WORD Value1[1];
 357     WORD Value2[1];
 358 } GPOS_PairValueRecord;
 359
 360 typedef struct {
 361     WORD PairValueCount;
 362     GPOS_PairValueRecord PairValueRecord[1];
 363 } GPOS_PairSet;
 364
 365 typedef struct {
 366     WORD EntryAnchor;
 367     WORD ExitAnchor;
 368 } GPOS_EntryExitRecord;
 369
 370 typedef struct {
 371     WORD PosFormat;
 372     WORD Coverage;
 373     WORD EntryExitCount;
 374     GPOS_EntryExitRecord EntryExitRecord[1];
 375 } GPOS_CursivePosFormat1;
 376
 377 typedef struct {
 378     WORD PosFormat;
 379     WORD MarkCoverage;
 380     WORD BaseCoverage;
 381     WORD ClassCount;
 382     WORD MarkArray;
 383     WORD BaseArray;
 384 } GPOS_MarkBasePosFormat1;
 385
 386 typedef struct {
 387     WORD BaseAnchor[1];
 388 } GPOS_BaseRecord;
 389
 390 typedef struct {
 391     WORD BaseCount;
 392     GPOS_BaseRecord BaseRecord[1];
 393 } GPOS_BaseArray;
 394
 395 typedef struct {
 396     WORD Class;
 397     WORD MarkAnchor;
 398 } GPOS_MarkRecord;
 399
 400 typedef struct {
 401     WORD MarkCount;
 402     GPOS_MarkRecord MarkRecord[1];
 403 } GPOS_MarkArray;
 404
 405 typedef struct {
 406     WORD PosFormat;
 407     WORD MarkCoverage;
 408     WORD LigatureCoverage;
 409     WORD ClassCount;
 410     WORD MarkArray;
 411     WORD LigatureArray;
 412 } GPOS_MarkLigPosFormat1;
 413
 414 typedef struct {
 415     WORD LigatureCount;
 416     WORD LigatureAttach[1];
 417 } GPOS_LigatureArray;
 418
 419 typedef struct {
 420     WORD LigatureAnchor[1];
 421 } GPOS_ComponentRecord;
 422
 423 typedef struct {
 424     WORD ComponentCount;
 425     GPOS_ComponentRecord ComponentRecord[1];
 426 } GPOS_LigatureAttach;
 427
 428 typedef struct {
 429     WORD PosFormat;
 430     WORD Mark1Coverage;
 431     WORD Mark2Coverage;
 432     WORD ClassCount;
 433     WORD Mark1Array;
 434     WORD Mark2Array;
 435 } GPOS_MarkMarkPosFormat1;
 436
 437 typedef struct {
 438     WORD Mark2Anchor[1];
 439 } GPOS_Mark2Record;
 440
 441 typedef struct {
 442     WORD Mark2Count;
 443     GPOS_Mark2Record Mark2Record[1];
 444 } GPOS_Mark2Array;
 445
 446 typedef struct {
 447     WORD SequenceIndex;
 448     WORD LookupListIndex;
 449 } GPOS_PosLookupRecord;
 450
 451 typedef struct {
 452     WORD PosFormat;
 453     WORD BacktrackGlyphCount;
 454     WORD Coverage[1];
 455 } GPOS_ChainContextPosFormat3_1;
 456
 457 typedef struct {
 458     WORD InputGlyphCount;
 459     WORD Coverage[1];
 460 } GPOS_ChainContextPosFormat3_2;
 461
 462 typedef struct {
 463     WORD LookaheadGlyphCount;
 464     WORD Coverage[1];
 465 } GPOS_ChainContextPosFormat3_3;
 466
 467 typedef struct {
 468     WORD PosCount;
 469     GPOS_PosLookupRecord PosLookupRecord[1];
 470 } GPOS_ChainContextPosFormat3_4;
 471
 472 typedef struct {
 473     WORD PosFormat;
 474     WORD ExtensionLookupType;
 475     DWORD ExtensionOffset;
 476 } GPOS_ExtensionPosFormat1;
 477
 478 /**********
 479  * CMAP
 480  **********/
 481
 482 static VOID *load_CMAP_format12_table(HDC hdc, ScriptCache *psc)
 483 {
 484     CMAP_Header *CMAP_Table = NULL;
 485     int length;
 486     int i;
 487
 488     if (!psc->CMAP_Table)
 489     {
 490         length = GetFontData(hdc, CMAP_TAG , 0, NULL, 0);
 491         if (length != GDI_ERROR)
 492         {
 493             psc->CMAP_Table = HeapAlloc(GetProcessHeap(),0,length);
 494             GetFontData(hdc, CMAP_TAG , 0, psc->CMAP_Table, length);
 495             TRACE("Loaded cmap table of %i bytes\n",length);
 496         }
 497         else
 498             return NULL;
 499     }
 500
 501     CMAP_Table = psc->CMAP_Table;
 502
 503     for (i = 0; i < GET_BE_WORD(CMAP_Table->numTables); i++)
 504     {
 505         if ( (GET_BE_WORD(CMAP_Table->tables[i].platformID) == 3) &&
 506              (GET_BE_WORD(CMAP_Table->tables[i].encodingID) == 10) )
 507         {
 508             CMAP_SegmentedCoverage *format = (CMAP_SegmentedCoverage*)(((BYTE*)CMAP_Table) + GET_BE_DWORD(CMAP_Table->tables[i].offset));
 509             if (GET_BE_WORD(format->format) == 12)
 510                 return format;
 511         }
 512     }
 513     return NULL;
 514 }
 515
 516 static int compare_group(const void *a, const void* b)
 517 {
 518     const DWORD *chr = a;
 519     const CMAP_SegmentedCoverage_group *group = b;
 520
 521     if (*chr < GET_BE_DWORD(group->startCharCode))
 522         return -1;
 523     if (*chr > GET_BE_DWORD(group->endCharCode))
 524         return 1;
 525     return 0;
 526 }
 527
 528 DWORD OpenType_CMAP_GetGlyphIndex(HDC hdc, ScriptCache *psc, DWORD utf32c, LPWORD pgi, DWORD flags)
 529 {
 530     /* BMP: use gdi32 for ease */
 531     if (utf32c < 0x10000)
 532     {
 533         WCHAR ch = utf32c;
 534         return GetGlyphIndicesW(hdc,&ch, 1, pgi, flags);
 535     }
 536
 537     if (!psc->CMAP_format12_Table)
 538         psc->CMAP_format12_Table = load_CMAP_format12_table(hdc, psc);
 539
 540     if (flags & GGI_MARK_NONEXISTING_GLYPHS)
 541         *pgi = 0xffff;
 542     else
 543         *pgi = 0;
 544
 545     if (psc->CMAP_format12_Table)
 546     {
 547         CMAP_SegmentedCoverage *format = NULL;
 548         CMAP_SegmentedCoverage_group *group = NULL;
 549
 550         format = (CMAP_SegmentedCoverage *)psc->CMAP_format12_Table;
 551
 552         group = bsearch(&utf32c, format->groups, GET_BE_DWORD(format->nGroups),
 553                         sizeof(CMAP_SegmentedCoverage_group), compare_group);
 554
 555         if (group)
 556         {
 557             DWORD offset = utf32c - GET_BE_DWORD(group->startCharCode);
 558             *pgi = GET_BE_DWORD(group->startGlyphID) + offset;
 559             return 0;
 560         }
 561     }
 562     return 0;
 563 }
 564
 565 /**********
 566  * GDEF
 567  **********/
 568
 569 static WORD OT_get_glyph_class(const void *table, WORD glyph)
 570 {
 571     WORD class = 0;
 572     const OT_ClassDefFormat1 *cf1 = table;
 573
 574     if (!table) return 0;
 575
 576     if (GET_BE_WORD(cf1->ClassFormat) == 1)
 577     {
 578         if (glyph >= GET_BE_WORD(cf1->StartGlyph))
 579         {
 580             int index = glyph - GET_BE_WORD(cf1->StartGlyph);
 581             if (index < GET_BE_WORD(cf1->GlyphCount))
 582                 class = GET_BE_WORD(cf1->ClassValueArray[index]);
 583         }
 584     }
 585     else if (GET_BE_WORD(cf1->ClassFormat) == 2)
 586     {
 587         const OT_ClassDefFormat2 *cf2 = table;
 588         int i, top;
 589         top = GET_BE_WORD(cf2->ClassRangeCount);
 590         for (i = 0; i < top; i++)
 591         {
 592             if (glyph >= GET_BE_WORD(cf2->ClassRangeRecord[i].Start) &&
 593                 glyph <= GET_BE_WORD(cf2->ClassRangeRecord[i].End))
 594             {
 595                 class = GET_BE_WORD(cf2->ClassRangeRecord[i].Class);
 596                 break;
 597             }
 598         }
 599     }
 600     else
 601         ERR("Unknown Class Format %i\n",GET_BE_WORD(cf1->ClassFormat));
 602
 603     return class;
 604 }
 605
 606 void OpenType_GDEF_UpdateGlyphProps(ScriptCache *psc, const WORD *pwGlyphs, const WORD cGlyphs, WORD* pwLogClust, const WORD cChars, SCRIPT_GLYPHPROP *pGlyphProp)
 607 {
 608     int i;
 609     void *glyph_class_table = NULL;
 610
 611     if (psc->GDEF_Table)
 612     {
 613         const GDEF_Header *header = psc->GDEF_Table;
 614         WORD offset = GET_BE_WORD( header->GlyphClassDef );
 615         if (offset)
 616             glyph_class_table = (BYTE *)psc->GDEF_Table + offset;
 617     }
 618
 619     for (i = 0; i < cGlyphs; i++)
 620     {
 621         WORD class;
 622         int char_count = 0;
 623         int k;
 624
 625         k = USP10_FindGlyphInLogClust(pwLogClust, cChars, i);
 626         if (k >= 0)
 627         {
 628             for (; k < cChars && pwLogClust[k] == i; k++)
 629                 char_count++;
 630         }
 631
 632         class = OT_get_glyph_class( glyph_class_table, pwGlyphs[i] );
 633
 634         switch (class)
 635         {
 636             case 0:
 637             case BaseGlyph:
 638                 pGlyphProp[i].sva.fClusterStart = 1;
 639                 pGlyphProp[i].sva.fDiacritic = 0;
 640                 pGlyphProp[i].sva.fZeroWidth = 0;
 641                 break;
 642             case LigatureGlyph:
 643                 pGlyphProp[i].sva.fClusterStart = 1;
 644                 pGlyphProp[i].sva.fDiacritic = 0;
 645                 pGlyphProp[i].sva.fZeroWidth = 0;
 646                 break;
 647             case MarkGlyph:
 648                 pGlyphProp[i].sva.fClusterStart = 0;
 649                 pGlyphProp[i].sva.fDiacritic = 1;
 650                 pGlyphProp[i].sva.fZeroWidth = 1;
 651                 break;
 652             case ComponentGlyph:
 653                 pGlyphProp[i].sva.fClusterStart = 0;
 654                 pGlyphProp[i].sva.fDiacritic = 0;
 655                 pGlyphProp[i].sva.fZeroWidth = 0;
 656                 break;
 657             default:
 658                 ERR("Unknown glyph class %i\n",class);
 659                 pGlyphProp[i].sva.fClusterStart = 1;
 660                 pGlyphProp[i].sva.fDiacritic = 0;
 661                 pGlyphProp[i].sva.fZeroWidth = 0;
 662         }
 663
 664         if (char_count == 0)
 665             pGlyphProp[i].sva.fClusterStart = 0;
 666     }
 667 }
 668
 669 /**********
 670  * GSUB
 671  **********/
 672 static INT GSUB_apply_lookup(const OT_LookupList* lookup, INT lookup_index, WORD *glyphs, INT glyph_index, INT write_dir, INT *glyph_count);
 673
 674 static INT GSUB_is_glyph_covered(LPCVOID table , UINT glyph)
 675 {
 676     const OT_CoverageFormat1* cf1;
 677
 678     cf1 = table;
 679
 680     if (GET_BE_WORD(cf1->CoverageFormat) == 1)
 681     {
 682         int count = GET_BE_WORD(cf1->GlyphCount);
 683         int i;
 684         TRACE("Coverage Format 1, %i glyphs\n",count);
 685         for (i = 0; i < count; i++)
 686             if (glyph == GET_BE_WORD(cf1->GlyphArray[i]))
 687                 return i;
 688         return -1;
 689     }
 690     else if (GET_BE_WORD(cf1->CoverageFormat) == 2)
 691     {
 692         const OT_CoverageFormat2* cf2;
 693         int i;
 694         int count;
 695         cf2 = (const OT_CoverageFormat2*)cf1;
 696
 697         count = GET_BE_WORD(cf2->RangeCount);
 698         TRACE("Coverage Format 2, %i ranges\n",count);
 699         for (i = 0; i < count; i++)
 700         {
 701             if (glyph < GET_BE_WORD(cf2->RangeRecord[i].Start))
 702                 return -1;
 703             if ((glyph >= GET_BE_WORD(cf2->RangeRecord[i].Start)) &&
 704                 (glyph <= GET_BE_WORD(cf2->RangeRecord[i].End)))
 705             {
 706                 return (GET_BE_WORD(cf2->RangeRecord[i].StartCoverageIndex) +
 707                     glyph - GET_BE_WORD(cf2->RangeRecord[i].Start));
 708             }
 709         }
 710         return -1;
 711     }
 712     else
 713         ERR("Unknown CoverageFormat %i\n",GET_BE_WORD(cf1->CoverageFormat));
 714
 715     return -1;
 716 }
 717
 718 static INT GSUB_apply_SingleSubst(const OT_LookupTable *look, WORD *glyphs, INT glyph_index, INT write_dir, INT *glyph_count)
 719 {
 720     int j;
 721     TRACE("Single Substitution Subtable\n");
 722
 723     for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++)
 724     {
 725         int offset;
 726         const GSUB_SingleSubstFormat1 *ssf1;
 727         offset = GET_BE_WORD(look->SubTable[j]);
 728         ssf1 = (const GSUB_SingleSubstFormat1*)((const BYTE*)look+offset);
 729         if (GET_BE_WORD(ssf1->SubstFormat) == 1)
 730         {
 731             int offset = GET_BE_WORD(ssf1->Coverage);
 732             TRACE("  subtype 1, delta %i\n", GET_BE_WORD(ssf1->DeltaGlyphID));
 733             if (GSUB_is_glyph_covered((const BYTE*)ssf1+offset, glyphs[glyph_index]) != -1)
 734             {
 735                 TRACE("  Glyph 0x%x ->",glyphs[glyph_index]);
 736                 glyphs[glyph_index] = glyphs[glyph_index] + GET_BE_WORD(ssf1->DeltaGlyphID);
 737                 TRACE(" 0x%x\n",glyphs[glyph_index]);
 738                 return glyph_index + write_dir;
 739             }
 740         }
 741         else
 742         {
 743             const GSUB_SingleSubstFormat2 *ssf2;
 744             INT index;
 745             INT offset;
 746
 747             ssf2 = (const GSUB_SingleSubstFormat2 *)ssf1;
 748             offset = GET_BE_WORD(ssf1->Coverage);
 749             TRACE("  subtype 2,  glyph count %i\n", GET_BE_WORD(ssf2->GlyphCount));
 750             index = GSUB_is_glyph_covered((const BYTE*)ssf2+offset, glyphs[glyph_index]);
 751             TRACE("  Coverage index %i\n",index);
 752             if (index != -1)
 753             {
 754                 if (glyphs[glyph_index] == GET_BE_WORD(ssf2->Substitute[index]))
 755                     return GSUB_E_NOGLYPH;
 756
 757                 TRACE("    Glyph is 0x%x ->",glyphs[glyph_index]);
 758                 glyphs[glyph_index] = GET_BE_WORD(ssf2->Substitute[index]);
 759                 TRACE("0x%x\n",glyphs[glyph_index]);
 760                 return glyph_index + write_dir;
 761             }
 762         }
 763     }
 764     return GSUB_E_NOGLYPH;
 765 }
 766
 767 static INT GSUB_apply_MultipleSubst(const OT_LookupTable *look, WORD *glyphs, INT glyph_index, INT write_dir, INT *glyph_count)
 768 {
 769     int j;
 770     TRACE("Multiple Substitution Subtable\n");
 771
 772     for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++)
 773     {
 774         int offset, index;
 775         const GSUB_MultipleSubstFormat1 *msf1;
 776         offset = GET_BE_WORD(look->SubTable[j]);
 777         msf1 = (const GSUB_MultipleSubstFormat1*)((const BYTE*)look+offset);
 778
 779         offset = GET_BE_WORD(msf1->Coverage);
 780         index = GSUB_is_glyph_covered((const BYTE*)msf1+offset, glyphs[glyph_index]);
 781         if (index != -1)
 782         {
 783             const GSUB_Sequence *seq;
 784             int sub_count;
 785             int j;
 786             offset = GET_BE_WORD(msf1->Sequence[index]);
 787             seq = (const GSUB_Sequence*)((const BYTE*)msf1+offset);
 788             sub_count = GET_BE_WORD(seq->GlyphCount);
 789             TRACE("  Glyph 0x%x (+%i)->",glyphs[glyph_index],(sub_count-1));
 790
 791             for (j = (*glyph_count)+(sub_count-1); j > glyph_index; j--)
 792                     glyphs[j] =glyphs[j-(sub_count-1)];
 793
 794             for (j = 0; j < sub_count; j++)
 795                     if (write_dir < 0)
 796                         glyphs[glyph_index + (sub_count-1) - j] = GET_BE_WORD(seq->Substitute[j]);
 797                     else
 798                         glyphs[glyph_index + j] = GET_BE_WORD(seq->Substitute[j]);
 799
 800             *glyph_count = *glyph_count + (sub_count - 1);
 801
 802             if (TRACE_ON(uniscribe))
 803             {
 804                 for (j = 0; j < sub_count; j++)
 805                     TRACE(" 0x%x",glyphs[glyph_index+j]);
 806                 TRACE("\n");
 807             }
 808
 809             return glyph_index + (sub_count * write_dir);
 810         }
 811     }
 812     return GSUB_E_NOGLYPH;
 813 }
 814
 815 static INT GSUB_apply_AlternateSubst(const OT_LookupTable *look, WORD *glyphs, INT glyph_index, INT write_dir, INT *glyph_count)
 816 {
 817     int j;
 818     TRACE("Alternate Substitution Subtable\n");
 819
 820     for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++)
 821     {
 822         int offset;
 823         const GSUB_AlternateSubstFormat1 *asf1;
 824         INT index;
 825
 826         offset = GET_BE_WORD(look->SubTable[j]);
 827         asf1 = (const GSUB_AlternateSubstFormat1*)((const BYTE*)look+offset);
 828         offset = GET_BE_WORD(asf1->Coverage);
 829
 830         index = GSUB_is_glyph_covered((const BYTE*)asf1+offset, glyphs[glyph_index]);
 831         if (index != -1)
 832         {
 833             const GSUB_AlternateSet *as;
 834             offset =  GET_BE_WORD(asf1->AlternateSet[index]);
 835             as = (const GSUB_AlternateSet*)((const BYTE*)asf1+offset);
 836             FIXME("%i alternates, picking index 0\n",GET_BE_WORD(as->GlyphCount));
 837             if (glyphs[glyph_index] == GET_BE_WORD(as->Alternate[0]))
 838                 return GSUB_E_NOGLYPH;
 839
 840             TRACE("  Glyph 0x%x ->",glyphs[glyph_index]);
 841             glyphs[glyph_index] = GET_BE_WORD(as->Alternate[0]);
 842             TRACE(" 0x%x\n",glyphs[glyph_index]);
 843             return glyph_index + write_dir;
 844         }
 845     }
 846     return GSUB_E_NOGLYPH;
 847 }
 848
 849 static INT GSUB_apply_LigatureSubst(const OT_LookupTable *look, WORD *glyphs, INT glyph_index, INT write_dir, INT *glyph_count)
 850 {
 851     int j;
 852
 853     TRACE("Ligature Substitution Subtable\n");
 854     for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++)
 855     {
 856         const GSUB_LigatureSubstFormat1 *lsf1;
 857         int offset,index;
 858
 859         offset = GET_BE_WORD(look->SubTable[j]);
 860         lsf1 = (const GSUB_LigatureSubstFormat1*)((const BYTE*)look+offset);
 861         offset = GET_BE_WORD(lsf1->Coverage);
 862         index = GSUB_is_glyph_covered((const BYTE*)lsf1+offset, glyphs[glyph_index]);
 863         TRACE("  Coverage index %i\n",index);
 864         if (index != -1)
 865         {
 866             const GSUB_LigatureSet *ls;
 867             int k, count;
 868
 869             offset = GET_BE_WORD(lsf1->LigatureSet[index]);
 870             ls = (const GSUB_LigatureSet*)((const BYTE*)lsf1+offset);
 871             count = GET_BE_WORD(ls->LigatureCount);
 872             TRACE("  LigatureSet has %i members\n",count);
 873             for (k = 0; k < count; k++)
 874             {
 875                 const GSUB_Ligature *lig;
 876                 int CompCount,l,CompIndex;
 877
 878                 offset = GET_BE_WORD(ls->Ligature[k]);
 879                 lig = (const GSUB_Ligature*)((const BYTE*)ls+offset);
 880                 CompCount = GET_BE_WORD(lig->CompCount) - 1;
 881                 CompIndex = glyph_index+write_dir;
 882                 for (l = 0; l < CompCount && CompIndex >= 0 && CompIndex < *glyph_count; l++)
 883                 {
 884                     int CompGlyph;
 885                     CompGlyph = GET_BE_WORD(lig->Component[l]);
 886                     if (CompGlyph != glyphs[CompIndex])
 887                         break;
 888                     CompIndex += write_dir;
 889                 }
 890                 if (l == CompCount)
 891                 {
 892                     int replaceIdx = glyph_index;
 893                     if (write_dir < 0)
 894                         replaceIdx = glyph_index - CompCount;
 895
 896                     TRACE("    Glyph is 0x%x (+%i) ->",glyphs[glyph_index],CompCount);
 897                     glyphs[replaceIdx] = GET_BE_WORD(lig->LigGlyph);
 898                     TRACE("0x%x\n",glyphs[replaceIdx]);
 899                     if (CompCount > 0)
 900                     {
 901                         int j;
 902                         for (j = replaceIdx + 1; j < *glyph_count; j++)
 903                             glyphs[j] =glyphs[j+CompCount];
 904                         *glyph_count = *glyph_count - CompCount;
 905                     }
 906                     return replaceIdx + write_dir;
 907                 }
 908             }
 909         }
 910     }
 911     return GSUB_E_NOGLYPH;
 912 }
 913
 914 static INT GSUB_apply_ChainContextSubst(const OT_LookupList* lookup, const OT_LookupTable *look, WORD *glyphs, INT glyph_index, INT write_dir, INT *glyph_count)
 915 {
 916     int j;
 917     BOOL done = FALSE;
 918
 919     TRACE("Chaining Contextual Substitution Subtable\n");
 920     for (j = 0; j < GET_BE_WORD(look->SubTableCount) && !done; j++)
 921     {
 922         const GSUB_ChainContextSubstFormat1 *ccsf1;
 923         int offset;
 924         int dirLookahead = write_dir;
 925         int dirBacktrack = -1 * write_dir;
 926
 927         offset = GET_BE_WORD(look->SubTable[j]);
 928         ccsf1 = (const GSUB_ChainContextSubstFormat1*)((const BYTE*)look+offset);
 929         if (GET_BE_WORD(ccsf1->SubstFormat) == 1)
 930         {
 931             FIXME("  TODO: subtype 1 (Simple context glyph substitution)\n");
 932             continue;
 933         }
 934         else if (GET_BE_WORD(ccsf1->SubstFormat) == 2)
 935         {
 936 #ifndef __REACTOS__
 937             FIXME("  TODO: subtype 2 (Class-based Chaining Context Glyph Substitution)\n");
 938 #endif
 939             continue;
 940         }
 941         else if (GET_BE_WORD(ccsf1->SubstFormat) == 3)
 942         {
 943             int k;
 944             int indexGlyphs;
 945             const GSUB_ChainContextSubstFormat3_1 *ccsf3_1;
 946             const GSUB_ChainContextSubstFormat3_2 *ccsf3_2;
 947             const GSUB_ChainContextSubstFormat3_3 *ccsf3_3;
 948             const GSUB_ChainContextSubstFormat3_4 *ccsf3_4;
 949             int newIndex = glyph_index;
 950
 951             ccsf3_1 = (const GSUB_ChainContextSubstFormat3_1 *)ccsf1;
 952
 953             TRACE("  subtype 3 (Coverage-based Chaining Context Glyph Substitution)\n");
 954
 955             for (k = 0; k < GET_BE_WORD(ccsf3_1->BacktrackGlyphCount); k++)
 956             {
 957                 offset = GET_BE_WORD(ccsf3_1->Coverage[k]);
 958                 if (GSUB_is_glyph_covered((const BYTE*)ccsf3_1+offset, glyphs[glyph_index + (dirBacktrack * (k+1))]) == -1)
 959                     break;
 960             }
 961             if (k != GET_BE_WORD(ccsf3_1->BacktrackGlyphCount))
 962                 continue;
 963             TRACE("Matched Backtrack\n");
 964
 965             ccsf3_2 = (const GSUB_ChainContextSubstFormat3_2 *)((BYTE *)ccsf1 +
 966                     FIELD_OFFSET(GSUB_ChainContextSubstFormat3_1, Coverage[GET_BE_WORD(ccsf3_1->BacktrackGlyphCount)]));
 967
 968             indexGlyphs = GET_BE_WORD(ccsf3_2->InputGlyphCount);
 969             for (k = 0; k < indexGlyphs; k++)
 970             {
 971                 offset = GET_BE_WORD(ccsf3_2->Coverage[k]);
 972                 if (GSUB_is_glyph_covered((const BYTE*)ccsf3_1+offset, glyphs[glyph_index + (write_dir * k)]) == -1)
 973                     break;
 974             }
 975             if (k != indexGlyphs)
 976                 continue;
 977             TRACE("Matched IndexGlyphs\n");
 978
 979             ccsf3_3 = (const GSUB_ChainContextSubstFormat3_3 *)((BYTE *)ccsf3_2 +
 980                     FIELD_OFFSET(GSUB_ChainContextSubstFormat3_2, Coverage[GET_BE_WORD(ccsf3_2->InputGlyphCount)]));
 981
 982             for (k = 0; k < GET_BE_WORD(ccsf3_3->LookaheadGlyphCount); k++)
 983             {
 984                 offset = GET_BE_WORD(ccsf3_3->Coverage[k]);
 985                 if (GSUB_is_glyph_covered((const BYTE*)ccsf3_1+offset, glyphs[glyph_index + (dirLookahead * (indexGlyphs + k))]) == -1)
 986                     break;
 987             }
 988             if (k != GET_BE_WORD(ccsf3_3->LookaheadGlyphCount))
 989                 continue;
 990             TRACE("Matched LookAhead\n");
 991
 992             ccsf3_4 = (const GSUB_ChainContextSubstFormat3_4 *)((BYTE *)ccsf3_3 +
 993                     FIELD_OFFSET(GSUB_ChainContextSubstFormat3_3, Coverage[GET_BE_WORD(ccsf3_3->LookaheadGlyphCount)]));
 994
 995             if (GET_BE_WORD(ccsf3_4->SubstCount))
 996             {
 997                 for (k = 0; k < GET_BE_WORD(ccsf3_4->SubstCount); k++)
 998                 {
 999                     int lookupIndex = GET_BE_WORD(ccsf3_4->SubstLookupRecord[k].LookupListIndex);
1000                     int SequenceIndex = GET_BE_WORD(ccsf3_4->SubstLookupRecord[k].SequenceIndex) * write_dir;
1001
1002                     TRACE("SUBST: %i -> %i %i\n",k, SequenceIndex, lookupIndex);
1003                     newIndex = GSUB_apply_lookup(lookup, lookupIndex, glyphs, glyph_index + SequenceIndex, write_dir, glyph_count);
1004                     if (newIndex == -1)
1005                     {
1006                         ERR("Chain failed to generate a glyph\n");
1007                         continue;
1008                     }
1009                 }
1010                 return newIndex;
1011             }
1012             else return GSUB_E_NOGLYPH;
1013         }
1014     }
1015     return -1;
1016 }
1017
1018 static INT GSUB_apply_lookup(const OT_LookupList* lookup, INT lookup_index, WORD *glyphs, INT glyph_index, INT write_dir, INT *glyph_count)
1019 {
1020     int offset;
1021     const OT_LookupTable *look;
1022
1023     offset = GET_BE_WORD(lookup->Lookup[lookup_index]);
1024     look = (const OT_LookupTable*)((const BYTE*)lookup + offset);
1025     TRACE("type %i, flag %x, subtables %i\n",GET_BE_WORD(look->LookupType),GET_BE_WORD(look->LookupFlag),GET_BE_WORD(look->SubTableCount));
1026     switch(GET_BE_WORD(look->LookupType))
1027     {
1028         case 1:
1029             return GSUB_apply_SingleSubst(look, glyphs, glyph_index, write_dir, glyph_count);
1030         case 2:
1031             return GSUB_apply_MultipleSubst(look, glyphs, glyph_index, write_dir, glyph_count);
1032         case 3:
1033             return GSUB_apply_AlternateSubst(look, glyphs, glyph_index, write_dir, glyph_count);
1034         case 4:
1035             return GSUB_apply_LigatureSubst(look, glyphs, glyph_index, write_dir, glyph_count);
1036         case 6:
1037             return GSUB_apply_ChainContextSubst(lookup, look, glyphs, glyph_index, write_dir, glyph_count);
1038         default:
1039             FIXME("We do not handle SubType %i\n",GET_BE_WORD(look->LookupType));
1040     }
1041     return GSUB_E_NOGLYPH;
1042 }
1043
1044 INT OpenType_apply_GSUB_lookup(LPCVOID table, INT lookup_index, WORD *glyphs, INT glyph_index, INT write_dir, INT *glyph_count)
1045 {
1046     const GSUB_Header *header = (const GSUB_Header *)table;
1047     const OT_LookupList *lookup = (const OT_LookupList*)((const BYTE*)header + GET_BE_WORD(header->LookupList));
1048
1049     return GSUB_apply_lookup(lookup, lookup_index, glyphs, glyph_index, write_dir, glyph_count);
1050 }
1051
1052 /**********
1053  * GPOS
1054  **********/
1055 static INT GPOS_apply_lookup(ScriptCache *psc, LPOUTLINETEXTMETRICW lpotm, LPLOGFONTW lplogfont, const SCRIPT_ANALYSIS *analysis, INT* piAdvance,
1056                              const OT_LookupList* lookup, INT lookup_index, const WORD *glyphs, INT glyph_index, INT glyph_count, GOFFSET *pGoffset);
1057
1058 static INT GPOS_get_device_table_value(const OT_DeviceTable *DeviceTable, WORD ppem)
1059 {
1060     static const WORD mask[3] = {3,0xf,0xff};
1061     if (DeviceTable && ppem >= GET_BE_WORD(DeviceTable->StartSize) && ppem  <= GET_BE_WORD(DeviceTable->EndSize))
1062     {
1063         int format = GET_BE_WORD(DeviceTable->DeltaFormat);
1064         int index = ppem - GET_BE_WORD(DeviceTable->StartSize);
1065         int value;
1066         TRACE("device table, format %i, index %i\n",format, index);
1067         index = index << format;
1068         value = (DeviceTable->DeltaValue[index/sizeof(WORD)] << (index%sizeof(WORD)))&mask[format-1];
1069         TRACE("offset %i, value %i\n",index, value);
1070         if (value > mask[format-1]/2)
1071             value = -1 * ((mask[format-1]+1) - value);
1072         return value;
1073     }
1074     return 0;
1075 }
1076
1077 static VOID GPOS_get_anchor_values(LPCVOID table, LPPOINT pt, WORD ppem)
1078 {
1079     const GPOS_AnchorFormat1* anchor1 = (const GPOS_AnchorFormat1*)table;
1080
1081     switch (GET_BE_WORD(anchor1->AnchorFormat))
1082     {
1083         case 1:
1084         {
1085             TRACE("Anchor Format 1\n");
1086             pt->x = (short)GET_BE_WORD(anchor1->XCoordinate);
1087             pt->y = (short)GET_BE_WORD(anchor1->YCoordinate);
1088             break;
1089         }
1090         case 2:
1091         {
1092             const GPOS_AnchorFormat2* anchor2 = (const GPOS_AnchorFormat2*)table;
1093             TRACE("Anchor Format 2\n");
1094             pt->x = (short)GET_BE_WORD(anchor2->XCoordinate);
1095             pt->y = (short)GET_BE_WORD(anchor2->YCoordinate);
1096             break;
1097         }
1098         case 3:
1099         {
1100             int offset;
1101             const GPOS_AnchorFormat3* anchor3 = (const GPOS_AnchorFormat3*)table;
1102             TRACE("Anchor Format 3\n");
1103             pt->x = (short)GET_BE_WORD(anchor3->XCoordinate);
1104             pt->y = (short)GET_BE_WORD(anchor3->YCoordinate);
1105             offset = GET_BE_WORD(anchor3->XDeviceTable);
1106             TRACE("ppem %i\n",ppem);
1107             if (offset)
1108             {
1109                 const OT_DeviceTable* DeviceTableX = NULL;
1110                 DeviceTableX = (const OT_DeviceTable*)((const BYTE*)anchor3 + offset);
1111                 pt->x += GPOS_get_device_table_value(DeviceTableX, ppem);
1112             }
1113             offset = GET_BE_WORD(anchor3->YDeviceTable);
1114             if (offset)
1115             {
1116                 const OT_DeviceTable* DeviceTableY = NULL;
1117                 DeviceTableY = (const OT_DeviceTable*)((const BYTE*)anchor3 + offset);
1118                 pt->y += GPOS_get_device_table_value(DeviceTableY, ppem);
1119             }
1120             break;
1121         }
1122         default:
1123             ERR("Unknown Anchor Format %i\n",GET_BE_WORD(anchor1->AnchorFormat));
1124             pt->x = 0;
1125             pt->y = 0;
1126     }
1127 }
1128
1129 static void GPOS_convert_design_units_to_device(LPOUTLINETEXTMETRICW lpotm, LPLOGFONTW lplogfont, int desX, int desY, double *devX, double *devY)
1130 {
1131     int emHeight = lpotm->otmTextMetrics.tmAscent + lpotm->otmTextMetrics.tmDescent - lpotm->otmTextMetrics.tmInternalLeading;
1132
1133     TRACE("emHeight %i lfWidth %i\n",emHeight, lplogfont->lfWidth);
1134     *devX = (desX * emHeight) / (double)lpotm->otmEMSquare;
1135     *devY = (desY * emHeight) / (double)lpotm->otmEMSquare;
1136     if (lplogfont->lfWidth)
1137         FIXME("Font with lfWidth set no handled properly\n");
1138 }
1139
1140 static INT GPOS_get_value_record(WORD ValueFormat, const WORD data[], GPOS_ValueRecord *record)
1141 {
1142     INT offset = 0;
1143     if (ValueFormat & 0x0001) { if (data) record->XPlacement = GET_BE_WORD(data[offset]); offset++; }
1144     if (ValueFormat & 0x0002) { if (data) record->YPlacement = GET_BE_WORD(data[offset]); offset++; }
1145     if (ValueFormat & 0x0004) { if (data) record->XAdvance   = GET_BE_WORD(data[offset]); offset++; }
1146     if (ValueFormat & 0x0008) { if (data) record->YAdvance   = GET_BE_WORD(data[offset]); offset++; }
1147     if (ValueFormat & 0x0010) { if (data) record->XPlaDevice = GET_BE_WORD(data[offset]); offset++; }
1148     if (ValueFormat & 0x0020) { if (data) record->YPlaDevice = GET_BE_WORD(data[offset]); offset++; }
1149     if (ValueFormat & 0x0040) { if (data) record->XAdvDevice = GET_BE_WORD(data[offset]); offset++; }
1150     if (ValueFormat & 0x0080) { if (data) record->YAdvDevice = GET_BE_WORD(data[offset]); offset++; }
1151     return offset;
1152 }
1153
1154 static VOID GPOS_get_value_record_offsets(const BYTE* head, GPOS_ValueRecord *ValueRecord,  WORD ValueFormat, INT ppem, LPPOINT ptPlacement, LPPOINT ptAdvance)
1155 {
1156     if (ValueFormat & 0x0001) ptPlacement->x += (short)ValueRecord->XPlacement;
1157     if (ValueFormat & 0x0002) ptPlacement->y += (short)ValueRecord->YPlacement;
1158     if (ValueFormat & 0x0004) ptAdvance->x += (short)ValueRecord->XAdvance;
1159     if (ValueFormat & 0x0008) ptAdvance->y += (short)ValueRecord->YAdvance;
1160     if (ValueFormat & 0x0010) ptPlacement->x += GPOS_get_device_table_value((const OT_DeviceTable*)(head + ValueRecord->XPlaDevice), ppem);
1161     if (ValueFormat & 0x0020) ptPlacement->y += GPOS_get_device_table_value((const OT_DeviceTable*)(head + ValueRecord->YPlaDevice), ppem);
1162     if (ValueFormat & 0x0040) ptAdvance->x += GPOS_get_device_table_value((const OT_DeviceTable*)(head + ValueRecord->XAdvDevice), ppem);
1163     if (ValueFormat & 0x0080) ptAdvance->y += GPOS_get_device_table_value((const OT_DeviceTable*)(head + ValueRecord->YAdvDevice), ppem);
1164     if (ValueFormat & 0xFF00) FIXME("Unhandled Value Format %x\n",ValueFormat&0xFF00);
1165 }
1166
1167 static const BYTE *GPOS_get_subtable(const OT_LookupTable *look, int index)
1168 {
1169     int offset = GET_BE_WORD(look->SubTable[index]);
1170
1171     if (GET_BE_WORD(look->LookupType) == 9)
1172     {
1173         const GPOS_ExtensionPosFormat1 *ext = (const GPOS_ExtensionPosFormat1 *)((const BYTE *)look + offset);
1174         if (GET_BE_WORD(ext->PosFormat) == 1)
1175         {
1176             offset += GET_BE_DWORD(ext->ExtensionOffset);
1177         }
1178         else
1179         {
1180             FIXME("Unhandled Extension Positioning Format %i\n",GET_BE_WORD(ext->PosFormat));
1181         }
1182     }
1183     return (const BYTE *)look + offset;
1184 }
1185
1186 static VOID GPOS_apply_SingleAdjustment(const OT_LookupTable *look, const SCRIPT_ANALYSIS *analysis, const WORD *glyphs, INT glyph_index,
1187                                         INT glyph_count, INT ppem, LPPOINT ptAdjust, LPPOINT ptAdvance)
1188 {
1189     int j;
1190
1191     TRACE("Single Adjustment Positioning Subtable\n");
1192
1193     for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++)
1194     {
1195         const GPOS_SinglePosFormat1 *spf1 = (const GPOS_SinglePosFormat1*)GPOS_get_subtable(look, j);
1196         WORD offset;
1197         if (GET_BE_WORD(spf1->PosFormat) == 1)
1198         {
1199             offset = GET_BE_WORD(spf1->Coverage);
1200             if (GSUB_is_glyph_covered((const BYTE*)spf1+offset, glyphs[glyph_index]) != -1)
1201             {
1202                 GPOS_ValueRecord ValueRecord = {0,0,0,0,0,0,0,0};
1203                 WORD ValueFormat = GET_BE_WORD(spf1->ValueFormat);
1204                 GPOS_get_value_record(ValueFormat, spf1->Value, &ValueRecord);
1205                 GPOS_get_value_record_offsets((const BYTE*)spf1, &ValueRecord,  ValueFormat, ppem, ptAdjust, ptAdvance);
1206                 TRACE("Glyph Adjusted by %i,%i\n",ValueRecord.XPlacement,ValueRecord.YPlacement);
1207             }
1208         }
1209         else if (GET_BE_WORD(spf1->PosFormat) == 2)
1210         {
1211             int index;
1212             const GPOS_SinglePosFormat2 *spf2;
1213             spf2 = (const GPOS_SinglePosFormat2*)spf1;
1214             offset = GET_BE_WORD(spf2->Coverage);
1215             index  = GSUB_is_glyph_covered((const BYTE*)spf2+offset, glyphs[glyph_index]);
1216             if (index != -1)
1217             {
1218                 int size;
1219                 GPOS_ValueRecord ValueRecord = {0,0,0,0,0,0,0,0};
1220                 WORD ValueFormat = GET_BE_WORD(spf2->ValueFormat);
1221                 size = GPOS_get_value_record(ValueFormat, spf2->Value, &ValueRecord);
1222                 if (index > 0)
1223                 {
1224                     offset = size * index;
1225                     GPOS_get_value_record(ValueFormat, &spf2->Value[offset], &ValueRecord);
1226                 }
1227                 GPOS_get_value_record_offsets((const BYTE*)spf2, &ValueRecord,  ValueFormat, ppem, ptAdjust, ptAdvance);
1228                 TRACE("Glyph Adjusted by %i,%i\n",ValueRecord.XPlacement,ValueRecord.YPlacement);
1229             }
1230         }
1231         else
1232             FIXME("Single Adjustment Positioning: Format %i Unhandled\n",GET_BE_WORD(spf1->PosFormat));
1233     }
1234 }
1235
1236 static void apply_pair_value( const void *pos_table, WORD val_fmt1, WORD val_fmt2, const WORD *pair,
1237                               INT ppem, POINT *adjust, POINT *advance )
1238 {
1239     GPOS_ValueRecord val_rec1 = {0,0,0,0,0,0,0,0};
1240     GPOS_ValueRecord val_rec2 = {0,0,0,0,0,0,0,0};
1241     INT size;
1242
1243     size = GPOS_get_value_record( val_fmt1, pair, &val_rec1 );
1244     GPOS_get_value_record( val_fmt2, pair + size, &val_rec2 );
1245
1246     if (val_fmt1)
1247     {
1248         GPOS_get_value_record_offsets( pos_table, &val_rec1, val_fmt1, ppem, adjust, advance );
1249         TRACE( "Glyph 1 resulting cumulative offset is %i,%i design units\n", adjust[0].x, adjust[0].y );
1250         TRACE( "Glyph 1 resulting cumulative advance is %i,%i design units\n", advance[0].x, advance[0].y );
1251     }
1252     if (val_fmt2)
1253     {
1254         GPOS_get_value_record_offsets( pos_table, &val_rec2, val_fmt2, ppem, adjust + 1, advance + 1 );
1255         TRACE( "Glyph 2 resulting cumulative offset is %i,%i design units\n", adjust[1].x, adjust[1].y );
1256         TRACE( "Glyph 2 resulting cumulative advance is %i,%i design units\n", advance[1].x, advance[1].y );
1257     }
1258 }
1259
1260 static INT GPOS_apply_PairAdjustment(const OT_LookupTable *look, const SCRIPT_ANALYSIS *analysis, const WORD *glyphs, INT glyph_index,
1261                                      INT glyph_count, INT ppem, LPPOINT ptAdjust, LPPOINT ptAdvance)
1262 {
1263     int j;
1264     int write_dir = (analysis->fRTL && !analysis->fLogicalOrder) ? -1 : 1;
1265
1266     if (glyph_index + write_dir < 0 || glyph_index + write_dir >= glyph_count) return glyph_index + 1;
1267
1268     TRACE("Pair Adjustment Positioning Subtable\n");
1269
1270     for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++)
1271     {
1272         const GPOS_PairPosFormat1 *ppf1 = (const GPOS_PairPosFormat1*)GPOS_get_subtable(look, j);
1273         WORD offset;
1274         if (GET_BE_WORD(ppf1->PosFormat) == 1)
1275         {
1276             int index;
1277             WORD ValueFormat1 = GET_BE_WORD(ppf1->ValueFormat1);
1278             WORD ValueFormat2 = GET_BE_WORD(ppf1->ValueFormat2);
1279             INT val_fmt1_size = GPOS_get_value_record( ValueFormat1, NULL, NULL );
1280             INT val_fmt2_size = GPOS_get_value_record( ValueFormat2, NULL, NULL );
1281             offset = GET_BE_WORD(ppf1->Coverage);
1282             index = GSUB_is_glyph_covered((const BYTE*)ppf1+offset, glyphs[glyph_index]);
1283             if (index != -1 && index < GET_BE_WORD(ppf1->PairSetCount))
1284             {
1285                 int k;
1286                 int pair_count;
1287                 const GPOS_PairSet *ps;
1288                 const GPOS_PairValueRecord *pair_val_rec;
1289                 offset = GET_BE_WORD(ppf1->PairSetOffset[index]);
1290                 ps = (const GPOS_PairSet*)((const BYTE*)ppf1+offset);
1291                 pair_count = GET_BE_WORD(ps->PairValueCount);
1292                 pair_val_rec = ps->PairValueRecord;
1293                 for (k = 0; k < pair_count; k++)
1294                 {
1295                     WORD second_glyph = GET_BE_WORD(pair_val_rec->SecondGlyph);
1296                     if (glyphs[glyph_index+write_dir] == second_glyph)
1297                     {
1298                         int next = 1;
1299                         TRACE("Format 1: Found Pair %x,%x\n",glyphs[glyph_index],glyphs[glyph_index+write_dir]);
1300                         apply_pair_value( ppf1, ValueFormat1, ValueFormat2, pair_val_rec->Value1, ppem, ptAdjust, ptAdvance );
1301                         if (ValueFormat2) next++;
1302                         return glyph_index + next;
1303                     }
1304                     pair_val_rec = (const GPOS_PairValueRecord *)(pair_val_rec->Value1 + val_fmt1_size + val_fmt2_size);
1305                 }
1306             }
1307         }
1308         else if (GET_BE_WORD(ppf1->PosFormat) == 2)
1309         {
1310             const GPOS_PairPosFormat2 *ppf2 = (const GPOS_PairPosFormat2*)ppf1;
1311             int index;
1312             WORD ValueFormat1 = GET_BE_WORD( ppf2->ValueFormat1 );
1313             WORD ValueFormat2 = GET_BE_WORD( ppf2->ValueFormat2 );
1314             INT val_fmt1_size = GPOS_get_value_record( ValueFormat1, NULL, NULL );
1315             INT val_fmt2_size = GPOS_get_value_record( ValueFormat2, NULL, NULL );
1316             WORD class1_count = GET_BE_WORD( ppf2->Class1Count );
1317             WORD class2_count = GET_BE_WORD( ppf2->Class2Count );
1318
1319             offset = GET_BE_WORD( ppf2->Coverage );
1320             index = GSUB_is_glyph_covered( (const BYTE*)ppf2 + offset, glyphs[glyph_index] );
1321             if (index != -1)
1322             {
1323                 WORD class1, class2;
1324                 class1 = OT_get_glyph_class( (const BYTE *)ppf2 + GET_BE_WORD(ppf2->ClassDef1), glyphs[glyph_index] );
1325                 class2 = OT_get_glyph_class( (const BYTE *)ppf2 + GET_BE_WORD(ppf2->ClassDef2), glyphs[glyph_index + write_dir] );
1326                 if (class1 < class1_count && class2 < class2_count)
1327                 {
1328                     const WORD *pair_val = ppf2->Class1Record + (class1 * class2_count + class2) * (val_fmt1_size + val_fmt2_size);
1329                     int next = 1;
1330
1331                     TRACE( "Format 2: Found Pair %x,%x\n", glyphs[glyph_index], glyphs[glyph_index + write_dir] );
1332
1333                     apply_pair_value( ppf2, ValueFormat1, ValueFormat2, pair_val, ppem, ptAdjust, ptAdvance );
1334                     if (ValueFormat2) next++;
1335                     return glyph_index + next;
1336                 }
1337             }
1338         }
1339         else
1340             FIXME("Pair Adjustment Positioning: Format %i Unhandled\n",GET_BE_WORD(ppf1->PosFormat));
1341     }
1342     return glyph_index+1;
1343 }
1344
1345 static VOID GPOS_apply_CursiveAttachment(const OT_LookupTable *look, const SCRIPT_ANALYSIS *analysis, const WORD *glyphs, INT glyph_index,
1346                                      INT glyph_count, INT ppem, LPPOINT pt)
1347 {
1348     int j;
1349     int write_dir = (analysis->fRTL && !analysis->fLogicalOrder) ? -1 : 1;
1350
1351     if (glyph_index + write_dir < 0 || glyph_index + write_dir >= glyph_count) return;
1352
1353     TRACE("Cursive Attachment Positioning Subtable\n");
1354
1355     for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++)
1356     {
1357         const GPOS_CursivePosFormat1 *cpf1 = (const GPOS_CursivePosFormat1 *)GPOS_get_subtable(look, j);
1358         if (GET_BE_WORD(cpf1->PosFormat) == 1)
1359         {
1360             int index_exit, index_entry;
1361             WORD offset = GET_BE_WORD( cpf1->Coverage );
1362             index_exit = GSUB_is_glyph_covered((const BYTE*)cpf1+offset, glyphs[glyph_index]);
1363             if (index_exit != -1 && cpf1->EntryExitRecord[index_exit].ExitAnchor!= 0)
1364             {
1365                 index_entry = GSUB_is_glyph_covered((const BYTE*)cpf1+offset, glyphs[glyph_index+write_dir]);
1366                 if (index_entry != -1 && cpf1->EntryExitRecord[index_entry].EntryAnchor != 0)
1367                 {
1368                     POINT exit_pt, entry_pt;
1369                     offset = GET_BE_WORD(cpf1->EntryExitRecord[index_exit].ExitAnchor);
1370                     GPOS_get_anchor_values((const BYTE*)cpf1 + offset, &exit_pt, ppem);
1371                     offset = GET_BE_WORD(cpf1->EntryExitRecord[index_entry].EntryAnchor);
1372                     GPOS_get_anchor_values((const BYTE*)cpf1 + offset, &entry_pt, ppem);
1373                     TRACE("Found linkage %x[%i,%i] %x[%i,%i]\n",glyphs[glyph_index], exit_pt.x,exit_pt.y, glyphs[glyph_index+write_dir], entry_pt.x, entry_pt.y);
1374                     pt->x = entry_pt.x - exit_pt.x;
1375                     pt->y = entry_pt.y - exit_pt.y;
1376                     return;
1377                 }
1378             }
1379         }
1380         else
1381             FIXME("Cursive Attachment Positioning: Format %i Unhandled\n",GET_BE_WORD(cpf1->PosFormat));
1382     }
1383     return;
1384 }
1385
1386 static int GPOS_apply_MarkToBase(ScriptCache *psc, const OT_LookupTable *look, const SCRIPT_ANALYSIS *analysis, const WORD *glyphs, INT glyph_index, INT glyph_count, INT ppem, LPPOINT pt)
1387 {
1388     int j;
1389     int write_dir = (analysis->fRTL && !analysis->fLogicalOrder) ? -1 : 1;
1390     void *glyph_class_table = NULL;
1391     int rc = -1;
1392
1393     if (psc->GDEF_Table)
1394     {
1395         const GDEF_Header *header = psc->GDEF_Table;
1396         WORD offset = GET_BE_WORD( header->GlyphClassDef );
1397         if (offset)
1398             glyph_class_table = (BYTE *)psc->GDEF_Table + offset;
1399     }
1400
1401     TRACE("MarkToBase Attachment Positioning Subtable\n");
1402
1403     for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++)
1404     {
1405         const GPOS_MarkBasePosFormat1 *mbpf1 = (const GPOS_MarkBasePosFormat1 *)GPOS_get_subtable(look, j);
1406         if (GET_BE_WORD(mbpf1->PosFormat) == 1)
1407         {
1408             int offset = GET_BE_WORD(mbpf1->MarkCoverage);
1409             int mark_index;
1410             mark_index = GSUB_is_glyph_covered((const BYTE*)mbpf1+offset, glyphs[glyph_index]);
1411             if (mark_index != -1)
1412             {
1413                 int base_index;
1414                 int base_glyph = glyph_index - write_dir;
1415
1416                 if (glyph_class_table)
1417                 {
1418                     while (OT_get_glyph_class(glyph_class_table, glyphs[base_glyph]) == MarkGlyph && base_glyph > 0 && base_glyph < glyph_count)
1419                         base_glyph -= write_dir;
1420                 }
1421
1422                 offset = GET_BE_WORD(mbpf1->BaseCoverage);
1423                 base_index = GSUB_is_glyph_covered((const BYTE*)mbpf1+offset, glyphs[base_glyph]);
1424                 if (base_index != -1)
1425                 {
1426                     const GPOS_MarkArray *ma;
1427                     const GPOS_MarkRecord *mr;
1428                     const GPOS_BaseArray *ba;
1429                     const GPOS_BaseRecord *br;
1430                     int mark_class;
1431                     int class_count = GET_BE_WORD(mbpf1->ClassCount);
1432                     int baserecord_size;
1433                     POINT base_pt;
1434                     POINT mark_pt;
1435                     TRACE("Mark %x(%i) and base %x(%i)\n",glyphs[glyph_index], mark_index, glyphs[base_glyph], base_index);
1436                     offset = GET_BE_WORD(mbpf1->MarkArray);
1437                     ma = (const GPOS_MarkArray*)((const BYTE*)mbpf1 + offset);
1438                     if (mark_index > GET_BE_WORD(ma->MarkCount))
1439                     {
1440                         ERR("Mark index exeeded mark count\n");
1441                         return -1;
1442                     }
1443                     mr = &ma->MarkRecord[mark_index];
1444                     mark_class = GET_BE_WORD(mr->Class);
1445                     TRACE("Mark Class %i total classes %i\n",mark_class,class_count);
1446                     offset = GET_BE_WORD(mbpf1->BaseArray);
1447                     ba = (const GPOS_BaseArray*)((const BYTE*)mbpf1 + offset);
1448                     baserecord_size = class_count * sizeof(WORD);
1449                     br = (const GPOS_BaseRecord*)((const BYTE*)ba + sizeof(WORD) + (baserecord_size * base_index));
1450                     offset = GET_BE_WORD(br->BaseAnchor[mark_class]);
1451                     GPOS_get_anchor_values((const BYTE*)ba + offset, &base_pt, ppem);
1452                     offset = GET_BE_WORD(mr->MarkAnchor);
1453                     GPOS_get_anchor_values((const BYTE*)ma + offset, &mark_pt, ppem);
1454                     TRACE("Offset on base is %i,%i design units\n",base_pt.x,base_pt.y);
1455                     TRACE("Offset on mark is %i,%i design units\n",mark_pt.x, mark_pt.y);
1456                     pt->x += base_pt.x - mark_pt.x;
1457                     pt->y += base_pt.y - mark_pt.y;
1458                     TRACE("Resulting cumulative offset is %i,%i design units\n",pt->x,pt->y);
1459                     rc = base_glyph;
1460                 }
1461             }
1462         }
1463         else
1464             FIXME("Unhandled Mark To Base Format %i\n",GET_BE_WORD(mbpf1->PosFormat));
1465     }
1466     return rc;
1467 }
1468
1469 static VOID GPOS_apply_MarkToLigature(const OT_LookupTable *look, const SCRIPT_ANALYSIS *analysis, const WORD *glyphs, INT glyph_index,
1470                                       INT glyph_count, INT ppem, LPPOINT pt)
1471 {
1472     int j;
1473     int write_dir = (analysis->fRTL && !analysis->fLogicalOrder) ? -1 : 1;
1474
1475     TRACE("MarkToLigature Attachment Positioning Subtable\n");
1476
1477     for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++)
1478     {
1479         const GPOS_MarkLigPosFormat1 *mlpf1 = (const GPOS_MarkLigPosFormat1 *)GPOS_get_subtable(look, j);
1480         if (GET_BE_WORD(mlpf1->PosFormat) == 1)
1481         {
1482             int offset = GET_BE_WORD(mlpf1->MarkCoverage);
1483             int mark_index;
1484             mark_index = GSUB_is_glyph_covered((const BYTE*)mlpf1+offset, glyphs[glyph_index]);
1485             if (mark_index != -1)
1486             {
1487                 int ligature_index;
1488                 offset = GET_BE_WORD(mlpf1->LigatureCoverage);
1489                 ligature_index = GSUB_is_glyph_covered((const BYTE*)mlpf1+offset, glyphs[glyph_index - write_dir]);
1490                 if (ligature_index != -1)
1491                 {
1492                     const GPOS_MarkArray *ma;
1493                     const GPOS_MarkRecord *mr;
1494
1495                     const GPOS_LigatureArray *la;
1496                     const GPOS_LigatureAttach *lt;
1497                     int mark_class;
1498                     int class_count = GET_BE_WORD(mlpf1->ClassCount);
1499                     int component_count;
1500                     int component_size;
1501                     int i;
1502                     POINT ligature_pt;
1503                     POINT mark_pt;
1504
1505                     TRACE("Mark %x(%i) and ligature %x(%i)\n",glyphs[glyph_index], mark_index, glyphs[glyph_index - write_dir], ligature_index);
1506                     offset = GET_BE_WORD(mlpf1->MarkArray);
1507                     ma = (const GPOS_MarkArray*)((const BYTE*)mlpf1 + offset);
1508                     if (mark_index > GET_BE_WORD(ma->MarkCount))
1509                     {
1510                         ERR("Mark index exeeded mark count\n");
1511                         return;
1512                     }
1513                     mr = &ma->MarkRecord[mark_index];
1514                     mark_class = GET_BE_WORD(mr->Class);
1515                     TRACE("Mark Class %i total classes %i\n",mark_class,class_count);
1516                     offset = GET_BE_WORD(mlpf1->LigatureArray);
1517                     la = (const GPOS_LigatureArray*)((const BYTE*)mlpf1 + offset);
1518                     if (ligature_index > GET_BE_WORD(la->LigatureCount))
1519                     {
1520                         ERR("Ligature index exeeded ligature count\n");
1521                         return;
1522                     }
1523                     offset = GET_BE_WORD(la->LigatureAttach[ligature_index]);
1524                     lt = (const GPOS_LigatureAttach*)((const BYTE*)la + offset);
1525
1526                     component_count = GET_BE_WORD(lt->ComponentCount);
1527                     component_size = class_count * sizeof(WORD);
1528                     offset = 0;
1529                     for (i = 0; i < component_count && !offset; i++)
1530                     {
1531                         int k;
1532                         const GPOS_ComponentRecord *cr = (const GPOS_ComponentRecord*)((const BYTE*)lt->ComponentRecord + (component_size * i));
1533                         for (k = 0; k < class_count && !offset; k++)
1534                             offset = GET_BE_WORD(cr->LigatureAnchor[k]);
1535                         cr = (const GPOS_ComponentRecord*)((const BYTE*)cr + component_size);
1536                     }
1537                     if (!offset)
1538                     {
1539                         ERR("Failed to find avalible ligature connection point\n");
1540                         return;
1541                     }
1542
1543                     GPOS_get_anchor_values((const BYTE*)lt + offset, &ligature_pt, ppem);
1544                     offset = GET_BE_WORD(mr->MarkAnchor);
1545                     GPOS_get_anchor_values((const BYTE*)ma + offset, &mark_pt, ppem);
1546                     TRACE("Offset on ligature is %i,%i design units\n",ligature_pt.x,ligature_pt.y);
1547                     TRACE("Offset on mark is %i,%i design units\n",mark_pt.x, mark_pt.y);
1548                     pt->x += ligature_pt.x - mark_pt.x;
1549                     pt->y += ligature_pt.y - mark_pt.y;
1550                     TRACE("Resulting cumulative offset is %i,%i design units\n",pt->x,pt->y);
1551                 }
1552             }
1553         }
1554         else
1555             FIXME("Unhandled Mark To Ligature Format %i\n",GET_BE_WORD(mlpf1->PosFormat));
1556     }
1557 }
1558
1559 static BOOL GPOS_apply_MarkToMark(const OT_LookupTable *look, const SCRIPT_ANALYSIS *analysis, const WORD *glyphs, INT glyph_index,
1560                                   INT glyph_count, INT ppem, LPPOINT pt)
1561 {
1562     int j;
1563     BOOL rc = FALSE;
1564     int write_dir = (analysis->fRTL && !analysis->fLogicalOrder) ? -1 : 1;
1565
1566     TRACE("MarkToMark Attachment Positioning Subtable\n");
1567
1568     for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++)
1569     {
1570         const GPOS_MarkMarkPosFormat1 *mmpf1 = (const GPOS_MarkMarkPosFormat1 *)GPOS_get_subtable(look, j);
1571         if (GET_BE_WORD(mmpf1->PosFormat) == 1)
1572         {
1573             int offset = GET_BE_WORD(mmpf1->Mark1Coverage);
1574             int mark_index;
1575             mark_index = GSUB_is_glyph_covered((const BYTE*)mmpf1+offset, glyphs[glyph_index]);
1576             if (mark_index != -1)
1577             {
1578                 int mark2_index;
1579                 offset = GET_BE_WORD(mmpf1->Mark2Coverage);
1580                 mark2_index = GSUB_is_glyph_covered((const BYTE*)mmpf1+offset, glyphs[glyph_index - write_dir]);
1581                 if (mark2_index != -1)
1582                 {
1583                     const GPOS_MarkArray *ma;
1584                     const GPOS_MarkRecord *mr;
1585                     const GPOS_Mark2Array *m2a;
1586                     const GPOS_Mark2Record *m2r;
1587                     int mark_class;
1588                     int class_count = GET_BE_WORD(mmpf1->ClassCount);
1589                     int mark2record_size;
1590                     POINT mark2_pt;
1591                     POINT mark_pt;
1592                     TRACE("Mark %x(%i) and Mark2 %x(%i)\n",glyphs[glyph_index], mark_index, glyphs[glyph_index - write_dir], mark2_index);
1593                     offset = GET_BE_WORD(mmpf1->Mark1Array);
1594                     ma = (const GPOS_MarkArray*)((const BYTE*)mmpf1 + offset);
1595                     if (mark_index > GET_BE_WORD(ma->MarkCount))
1596                     {
1597                         ERR("Mark index exceeded mark count\n");
1598                         return FALSE;
1599                     }
1600                     mr = &ma->MarkRecord[mark_index];
1601                     mark_class = GET_BE_WORD(mr->Class);
1602                     TRACE("Mark Class %i total classes %i\n",mark_class,class_count);
1603                     offset = GET_BE_WORD(mmpf1->Mark2Array);
1604                     m2a = (const GPOS_Mark2Array*)((const BYTE*)mmpf1 + offset);
1605                     mark2record_size = class_count * sizeof(WORD);
1606                     m2r = (const GPOS_Mark2Record*)((const BYTE*)m2a + sizeof(WORD) + (mark2record_size * mark2_index));
1607                     offset = GET_BE_WORD(m2r->Mark2Anchor[mark_class]);
1608                     GPOS_get_anchor_values((const BYTE*)m2a + offset, &mark2_pt, ppem);
1609                     offset = GET_BE_WORD(mr->MarkAnchor);
1610                     GPOS_get_anchor_values((const BYTE*)ma + offset, &mark_pt, ppem);
1611                     TRACE("Offset on mark2 is %i,%i design units\n",mark2_pt.x,mark2_pt.y);
1612                     TRACE("Offset on mark is %i,%i design units\n",mark_pt.x, mark_pt.y);
1613                     pt->x += mark2_pt.x - mark_pt.x;
1614                     pt->y += mark2_pt.y - mark_pt.y;
1615                     TRACE("Resulting cumulative offset is %i,%i design units\n",pt->x,pt->y);
1616                     rc = TRUE;
1617                 }
1618             }
1619         }
1620         else
1621             FIXME("Unhandled Mark To Mark Format %i\n",GET_BE_WORD(mmpf1->PosFormat));
1622     }
1623     return rc;
1624 }
1625
1626 static INT GPOS_apply_ChainContextPos(ScriptCache *psc, LPOUTLINETEXTMETRICW lpotm, LPLOGFONTW lplogfont, const SCRIPT_ANALYSIS *analysis, INT* piAdvance,
1627                                       const OT_LookupList *lookup, const OT_LookupTable *look, const WORD *glyphs, INT glyph_index,
1628                                       INT glyph_count, INT ppem, GOFFSET *pGoffset)
1629 {
1630     int j;
1631     int write_dir = (analysis->fRTL && !analysis->fLogicalOrder) ? -1 : 1;
1632
1633     TRACE("Chaining Contextual Positioning Subtable\n");
1634
1635     for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++)
1636     {
1637         int offset;
1638         const GPOS_ChainContextPosFormat3_1 *ccpf3 = (GPOS_ChainContextPosFormat3_1 *)GPOS_get_subtable(look, j);
1639         int dirLookahead = write_dir;
1640         int dirBacktrack = -1 * write_dir;
1641
1642         if (GET_BE_WORD(ccpf3->PosFormat) == 1)
1643         {
1644             FIXME("  TODO: subtype 1 (Simple Chaining Context Glyph Positioning)\n");
1645             continue;
1646         }
1647         else if (GET_BE_WORD(ccpf3->PosFormat) == 2)
1648         {
1649             FIXME("  TODO: subtype 2 (Class-based Chaining Context Glyph Positioning)\n");
1650             continue;
1651         }
1652         else if (GET_BE_WORD(ccpf3->PosFormat) == 3)
1653         {
1654             int k;
1655             int indexGlyphs;
1656             const GPOS_ChainContextPosFormat3_2 *ccpf3_2;
1657             const GPOS_ChainContextPosFormat3_3 *ccpf3_3;
1658             const GPOS_ChainContextPosFormat3_4 *ccpf3_4;
1659
1660             TRACE("  subtype 3 (Coverage-based Chaining Context Glyph Positioning)\n");
1661
1662             for (k = 0; k < GET_BE_WORD(ccpf3->BacktrackGlyphCount); k++)
1663             {
1664                 offset = GET_BE_WORD(ccpf3->Coverage[k]);
1665                 if (GSUB_is_glyph_covered((const BYTE*)ccpf3+offset, glyphs[glyph_index + (dirBacktrack * (k+1))]) == -1)
1666                     break;
1667             }
1668             if (k != GET_BE_WORD(ccpf3->BacktrackGlyphCount))
1669                 continue;
1670             TRACE("Matched Backtrack\n");
1671
1672             ccpf3_2 = (const GPOS_ChainContextPosFormat3_2*)((BYTE *)ccpf3 +
1673                     FIELD_OFFSET(GPOS_ChainContextPosFormat3_1, Coverage[GET_BE_WORD(ccpf3->BacktrackGlyphCount)]));
1674
1675             indexGlyphs = GET_BE_WORD(ccpf3_2->InputGlyphCount);
1676             for (k = 0; k < indexGlyphs; k++)
1677             {
1678                 offset = GET_BE_WORD(ccpf3_2->Coverage[k]);
1679                 if (GSUB_is_glyph_covered((const BYTE*)ccpf3+offset, glyphs[glyph_index + (write_dir * k)]) == -1)
1680                     break;
1681             }
1682             if (k != indexGlyphs)
1683                 continue;
1684             TRACE("Matched IndexGlyphs\n");
1685
1686             ccpf3_3 = (const GPOS_ChainContextPosFormat3_3*)((BYTE *)ccpf3_2 +
1687                     FIELD_OFFSET(GPOS_ChainContextPosFormat3_2, Coverage[GET_BE_WORD(ccpf3_2->InputGlyphCount)]));
1688
1689             for (k = 0; k < GET_BE_WORD(ccpf3_3->LookaheadGlyphCount); k++)
1690             {
1691                 offset = GET_BE_WORD(ccpf3_3->Coverage[k]);
1692                 if (GSUB_is_glyph_covered((const BYTE*)ccpf3+offset, glyphs[glyph_index + (dirLookahead * (indexGlyphs + k))]) == -1)
1693                     break;
1694             }
1695             if (k != GET_BE_WORD(ccpf3_3->LookaheadGlyphCount))
1696                 continue;
1697             TRACE("Matched LookAhead\n");
1698
1699             ccpf3_4 = (const GPOS_ChainContextPosFormat3_4*)((BYTE *)ccpf3_3 +
1700                     FIELD_OFFSET(GPOS_ChainContextPosFormat3_3, Coverage[GET_BE_WORD(ccpf3_3->LookaheadGlyphCount)]));
1701
1702             if (GET_BE_WORD(ccpf3_4->PosCount))
1703             {
1704                 for (k = 0; k < GET_BE_WORD(ccpf3_4->PosCount); k++)
1705                 {
1706                     int lookupIndex = GET_BE_WORD(ccpf3_4->PosLookupRecord[k].LookupListIndex);
1707                     int SequenceIndex = GET_BE_WORD(ccpf3_4->PosLookupRecord[k].SequenceIndex) * write_dir;
1708
1709                     TRACE("Position: %i -> %i %i\n",k, SequenceIndex, lookupIndex);
1710                     GPOS_apply_lookup(psc, lpotm, lplogfont, analysis, piAdvance, lookup, lookupIndex, glyphs, glyph_index + SequenceIndex, glyph_count, pGoffset);
1711                 }
1712                 return glyph_index + indexGlyphs + GET_BE_WORD(ccpf3_3->LookaheadGlyphCount);
1713             }
1714             else return glyph_index + 1;
1715         }
1716         else
1717             FIXME("Unhandled Chaining Contextual Positioning Format %i\n",GET_BE_WORD(ccpf3->PosFormat));
1718     }
1719     return glyph_index + 1;
1720 }
1721
1722 static INT GPOS_apply_lookup(ScriptCache *psc, LPOUTLINETEXTMETRICW lpotm, LPLOGFONTW lplogfont, const SCRIPT_ANALYSIS *analysis, INT* piAdvance, const OT_LookupList* lookup, INT lookup_index, const WORD *glyphs, INT glyph_index, INT glyph_count, GOFFSET *pGoffset)
1723 {
1724     int offset;
1725     const OT_LookupTable *look;
1726     int ppem = lpotm->otmTextMetrics.tmAscent + lpotm->otmTextMetrics.tmDescent - lpotm->otmTextMetrics.tmInternalLeading;
1727     WORD type;
1728
1729     offset = GET_BE_WORD(lookup->Lookup[lookup_index]);
1730     look = (const OT_LookupTable*)((const BYTE*)lookup + offset);
1731     type = GET_BE_WORD(look->LookupType);
1732     TRACE("type %i, flag %x, subtables %i\n",type,GET_BE_WORD(look->LookupFlag),GET_BE_WORD(look->SubTableCount));
1733     if (type == 9)
1734     {
1735         if (GET_BE_WORD(look->SubTableCount))
1736         {
1737             const GPOS_ExtensionPosFormat1 *ext = (const GPOS_ExtensionPosFormat1 *)((const BYTE *)look + GET_BE_WORD(look->SubTable[0]));
1738             if (GET_BE_WORD(ext->PosFormat) == 1)
1739             {
1740                 type = GET_BE_WORD(ext->ExtensionLookupType);
1741                 TRACE("extension type %i\n",type);
1742             }
1743             else
1744             {
1745                 FIXME("Unhandled Extension Positioning Format %i\n",GET_BE_WORD(ext->PosFormat));
1746             }
1747         }
1748         else
1749         {
1750             WARN("lookup type is Extension Positioning but no extension subtable exists\n");
1751         }
1752     }
1753     switch (type)
1754     {
1755         case 1:
1756         {
1757             double devX, devY;
1758             POINT adjust = {0,0};
1759             POINT advance = {0,0};
1760             GPOS_apply_SingleAdjustment(look, analysis, glyphs, glyph_index, glyph_count, ppem, &adjust, &advance);
1761             if (adjust.x || adjust.y)
1762             {
1763                 GPOS_convert_design_units_to_device(lpotm, lplogfont, adjust.x, adjust.y, &devX, &devY);
1764                 pGoffset[glyph_index].du += round(devX);
1765                 pGoffset[glyph_index].dv += round(devY);
1766             }
1767             if (advance.x || advance.y)
1768             {
1769                 GPOS_convert_design_units_to_device(lpotm, lplogfont, advance.x, advance.y, &devX, &devY);
1770                 piAdvance[glyph_index] += round(devX);
1771                 if (advance.y)
1772                     FIXME("Unhandled adjustment to Y advancement\n");
1773             }
1774             break;
1775         }
1776         case 2:
1777         {
1778             POINT advance[2]= {{0,0},{0,0}};
1779             POINT adjust[2]= {{0,0},{0,0}};
1780             double devX, devY;
1781             int index;
1782             int write_dir = (analysis->fRTL && !analysis->fLogicalOrder) ? -1 : 1;
1783             int offset_sign = (analysis->fRTL && analysis->fLogicalOrder) ? -1 : 1;
1784
1785             index = GPOS_apply_PairAdjustment(look, analysis, glyphs, glyph_index, glyph_count, ppem, adjust, advance);
1786             if (adjust[0].x || adjust[0].y)
1787             {
1788                 GPOS_convert_design_units_to_device(lpotm, lplogfont, adjust[0].x, adjust[0].y, &devX, &devY);
1789                 pGoffset[glyph_index].du += round(devX) * offset_sign;
1790                 pGoffset[glyph_index].dv += round(devY);
1791             }
1792             if (advance[0].x || advance[0].y)
1793             {
1794                 GPOS_convert_design_units_to_device(lpotm, lplogfont, advance[0].x, advance[0].y, &devX, &devY);
1795                 piAdvance[glyph_index] += round(devX);
1796             }
1797             if (adjust[1].x || adjust[1].y)
1798             {
1799                 GPOS_convert_design_units_to_device(lpotm, lplogfont, adjust[1].x, adjust[1].y, &devX, &devY);
1800                 pGoffset[glyph_index + write_dir].du += round(devX) * offset_sign;
1801                 pGoffset[glyph_index + write_dir].dv += round(devY);
1802             }
1803             if (advance[1].x || advance[1].y)
1804             {
1805                 GPOS_convert_design_units_to_device(lpotm, lplogfont, advance[1].x, advance[1].y, &devX, &devY);
1806                 piAdvance[glyph_index + write_dir] += round(devX);
1807             }
1808             return index;
1809         }
1810         case 3:
1811         {
1812             POINT desU = {0,0};
1813             double devX, devY;
1814             int write_dir = (analysis->fRTL && !analysis->fLogicalOrder) ? -1 : 1;
1815
1816             GPOS_apply_CursiveAttachment(look, analysis, glyphs, glyph_index, glyph_count, ppem, &desU);
1817             if (desU.x || desU.y)
1818             {
1819                 GPOS_convert_design_units_to_device(lpotm, lplogfont, desU.x, desU.y, &devX, &devY);
1820                 /* Windows does not appear to apply X offsets here */
1821                 pGoffset[glyph_index].dv = round(devY) + pGoffset[glyph_index+write_dir].dv;
1822             }
1823             break;
1824         }
1825         case 4:
1826         {
1827             double devX, devY;
1828             POINT desU = {0,0};
1829             int base_index = GPOS_apply_MarkToBase(psc, look, analysis, glyphs, glyph_index, glyph_count, ppem, &desU);
1830             if (base_index != -1)
1831             {
1832                 GPOS_convert_design_units_to_device(lpotm, lplogfont, desU.x, desU.y, &devX, &devY);
1833                 if (!analysis->fRTL) pGoffset[glyph_index].du = round(devX) - piAdvance[base_index];
1834                 else
1835                 {
1836                     if (analysis->fLogicalOrder) devX *= -1;
1837                     pGoffset[glyph_index].du = round(devX);
1838                 }
1839                 pGoffset[glyph_index].dv = round(devY);
1840             }
1841             break;
1842         }
1843         case 5:
1844         {
1845             double devX, devY;
1846             POINT desU = {0,0};
1847             GPOS_apply_MarkToLigature(look, analysis, glyphs, glyph_index, glyph_count, ppem, &desU);
1848             if (desU.x || desU.y)
1849             {
1850                 GPOS_convert_design_units_to_device(lpotm, lplogfont, desU.x, desU.y, &devX, &devY);
1851                 pGoffset[glyph_index].du = (round(devX) - piAdvance[glyph_index-1]);
1852                 pGoffset[glyph_index].dv = round(devY);
1853             }
1854             break;
1855         }
1856         case 6:
1857         {
1858             double devX, devY;
1859             POINT desU = {0,0};
1860             int write_dir = (analysis->fRTL && !analysis->fLogicalOrder) ? -1 : 1;
1861             if (GPOS_apply_MarkToMark(look, analysis, glyphs, glyph_index, glyph_count, ppem, &desU))
1862             {
1863                 GPOS_convert_design_units_to_device(lpotm, lplogfont, desU.x, desU.y, &devX, &devY);
1864                 if (analysis->fRTL && analysis->fLogicalOrder) devX *= -1;
1865                 pGoffset[glyph_index].du = round(devX) + pGoffset[glyph_index - write_dir].du;
1866                 pGoffset[glyph_index].dv = round(devY) + pGoffset[glyph_index - write_dir].dv;
1867             }
1868             break;
1869         }
1870         case 8:
1871         {
1872             return GPOS_apply_ChainContextPos(psc, lpotm, lplogfont, analysis, piAdvance, lookup, look, glyphs, glyph_index, glyph_count, ppem, pGoffset);
1873         }
1874         default:
1875             FIXME("We do not handle SubType %i\n",type);
1876     }
1877     return glyph_index+1;
1878 }
1879
1880 INT OpenType_apply_GPOS_lookup(ScriptCache *psc, LPOUTLINETEXTMETRICW lpotm, LPLOGFONTW lplogfont, const SCRIPT_ANALYSIS *analysis, INT* piAdvance, INT lookup_index, const WORD *glyphs, INT glyph_index, INT glyph_count, GOFFSET *pGoffset)
1881 {
1882     const GPOS_Header *header = (const GPOS_Header *)psc->GPOS_Table;
1883     const OT_LookupList *lookup = (const OT_LookupList*)((const BYTE*)header + GET_BE_WORD(header->LookupList));
1884
1885     return GPOS_apply_lookup(psc, lpotm, lplogfont, analysis, piAdvance, lookup, lookup_index, glyphs, glyph_index, glyph_count, pGoffset);
1886 }
1887
1888 static void GSUB_initialize_script_cache(ScriptCache *psc)
1889 {
1890     int i;
1891
1892     if (psc->GSUB_Table)
1893     {
1894         const OT_ScriptList *script;
1895         const GSUB_Header* header = (const GSUB_Header*)psc->GSUB_Table;
1896         script = (const OT_ScriptList*)((const BYTE*)header + GET_BE_WORD(header->ScriptList));
1897         psc->script_count = GET_BE_WORD(script->ScriptCount);
1898         TRACE("initializing %i scripts in this font\n",psc->script_count);
1899         if (psc->script_count)
1900         {
1901             psc->scripts = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(LoadedScript) * psc->script_count);
1902             for (i = 0; i < psc->script_count; i++)
1903             {
1904                 int offset = GET_BE_WORD(script->ScriptRecord[i].Script);
1905                 psc->scripts[i].tag = MS_MAKE_TAG(script->ScriptRecord[i].ScriptTag[0], script->ScriptRecord[i].ScriptTag[1], script->ScriptRecord[i].ScriptTag[2], script->ScriptRecord[i].ScriptTag[3]);
1906                 psc->scripts[i].gsub_table = ((const BYTE*)script + offset);
1907             }
1908         }
1909     }
1910 }
1911
1912 static void GPOS_expand_script_cache(ScriptCache *psc)
1913 {
1914     int i, count;
1915     const OT_ScriptList *script;
1916     const GPOS_Header* header = (const GPOS_Header*)psc->GPOS_Table;
1917
1918     if (!header)
1919         return;
1920
1921     script = (const OT_ScriptList*)((const BYTE*)header + GET_BE_WORD(header->ScriptList));
1922     count = GET_BE_WORD(script->ScriptCount);
1923
1924     if (!count)
1925         return;
1926
1927     if (!psc->script_count)
1928     {
1929         psc->script_count = count;
1930         TRACE("initializing %i scripts in this font\n",psc->script_count);
1931         if (psc->script_count)
1932         {
1933             psc->scripts = HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,sizeof(LoadedScript) * psc->script_count);
1934             for (i = 0; i < psc->script_count; i++)
1935             {
1936                 int offset = GET_BE_WORD(script->ScriptRecord[i].Script);
1937                 psc->scripts[i].tag = MS_MAKE_TAG(script->ScriptRecord[i].ScriptTag[0], script->ScriptRecord[i].ScriptTag[1], script->ScriptRecord[i].ScriptTag[2], script->ScriptRecord[i].ScriptTag[3]);
1938                 psc->scripts[i].gpos_table = ((const BYTE*)script + offset);
1939             }
1940         }
1941     }
1942     else
1943     {
1944         for (i = 0; i < count; i++)
1945         {
1946             int j;
1947             int offset = GET_BE_WORD(script->ScriptRecord[i].Script);
1948             OPENTYPE_TAG tag = MS_MAKE_TAG(script->ScriptRecord[i].ScriptTag[0], script->ScriptRecord[i].ScriptTag[1], script->ScriptRecord[i].ScriptTag[2], script->ScriptRecord[i].ScriptTag[3]);
1949             for (j = 0; j < psc->script_count; j++)
1950             {
1951                 if (psc->scripts[j].tag == tag)
1952                 {
1953                     psc->scripts[j].gpos_table = ((const BYTE*)script + offset);
1954                     break;
1955                 }
1956             }
1957             if (j == psc->script_count)
1958             {
1959                 psc->script_count++;
1960                 psc->scripts = HeapReAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,psc->scripts, sizeof(LoadedScript) * psc->script_count);
1961                 psc->scripts[j].tag = tag;
1962                 psc->scripts[j].gpos_table = ((const BYTE*)script + offset);
1963             }
1964         }
1965     }
1966 }
1967
1968 static void _initialize_script_cache(ScriptCache *psc)
1969 {
1970     if (!psc->scripts_initialized)
1971     {
1972         GSUB_initialize_script_cache(psc);
1973         GPOS_expand_script_cache(psc);
1974         psc->scripts_initialized = TRUE;
1975     }
1976 }
1977
1978 HRESULT OpenType_GetFontScriptTags(ScriptCache *psc, OPENTYPE_TAG searchingFor, int cMaxTags, OPENTYPE_TAG *pScriptTags, int *pcTags)
1979 {
1980     int i;
1981     HRESULT rc = S_OK;
1982
1983     _initialize_script_cache(psc);
1984
1985     *pcTags = psc->script_count;
1986
1987     if (!searchingFor && cMaxTags < *pcTags)
1988         rc = E_OUTOFMEMORY;
1989     else if (searchingFor)
1990         rc = USP_E_SCRIPT_NOT_IN_FONT;
1991
1992     for (i = 0; i < psc->script_count; i++)
1993     {
1994         if (i < cMaxTags)
1995             pScriptTags[i] = psc->scripts[i].tag;
1996
1997         if (searchingFor)
1998         {
1999             if (searchingFor == psc->scripts[i].tag)
2000             {
2001                 pScriptTags[0] = psc->scripts[i].tag;
2002                 *pcTags = 1;
2003                 rc = S_OK;
2004                 break;
2005             }
2006         }
2007     }
2008     return rc;
2009 }
2010
2011 static void GSUB_initialize_language_cache(LoadedScript *script)
2012 {
2013     int i;
2014
2015     if (script->gsub_table)
2016     {
2017         DWORD offset;
2018         const OT_Script* table = script->gsub_table;
2019         script->language_count = GET_BE_WORD(table->LangSysCount);
2020         offset = GET_BE_WORD(table->DefaultLangSys);
2021         if (offset)
2022         {
2023             script->default_language.tag = MS_MAKE_TAG('d','f','l','t');
2024             script->default_language.gsub_table = (const BYTE*)table + offset;
2025         }
2026
2027         if (script->language_count)
2028         {
2029             TRACE("Deflang %p, LangCount %i\n",script->default_language.gsub_table, script->language_count);
2030
2031             script->languages = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(LoadedLanguage) * script->language_count);
2032
2033             for (i = 0; i < script->language_count; i++)
2034             {
2035                 int offset = GET_BE_WORD(table->LangSysRecord[i].LangSys);
2036                 script->languages[i].tag = MS_MAKE_TAG(table->LangSysRecord[i].LangSysTag[0], table->LangSysRecord[i].LangSysTag[1], table->LangSysRecord[i].LangSysTag[2], table->LangSysRecord[i].LangSysTag[3]);
2037                 script->languages[i].gsub_table = ((const BYTE*)table + offset);
2038             }
2039         }
2040     }
2041 }
2042
2043 static void GPOS_expand_language_cache(LoadedScript *script)
2044 {
2045     int count;
2046     const OT_Script* table = script->gpos_table;
2047     DWORD offset;
2048
2049     if (!table)
2050         return;
2051
2052     offset = GET_BE_WORD(table->DefaultLangSys);
2053     if (offset)
2054         script->default_language.gpos_table = (const BYTE*)table + offset;
2055
2056     count = GET_BE_WORD(table->LangSysCount);
2057
2058     TRACE("Deflang %p, LangCount %i\n",script->default_language.gpos_table, count);
2059
2060     if (!count)
2061         return;
2062
2063     if (!script->language_count)
2064     {
2065         int i;
2066         script->language_count = count;
2067
2068         script->languages = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(LoadedLanguage) * script->language_count);
2069
2070         for (i = 0; i < script->language_count; i++)
2071         {
2072             int offset = GET_BE_WORD(table->LangSysRecord[i].LangSys);
2073             script->languages[i].tag = MS_MAKE_TAG(table->LangSysRecord[i].LangSysTag[0], table->LangSysRecord[i].LangSysTag[1], table->LangSysRecord[i].LangSysTag[2], table->LangSysRecord[i].LangSysTag[3]);
2074             script->languages[i].gpos_table = ((const BYTE*)table + offset);
2075         }
2076     }
2077     else if (count)
2078     {
2079         int i,j;
2080         for (i = 0; i < count; i++)
2081         {
2082             int offset = GET_BE_WORD(table->LangSysRecord[i].LangSys);
2083             OPENTYPE_TAG tag = MS_MAKE_TAG(table->LangSysRecord[i].LangSysTag[0], table->LangSysRecord[i].LangSysTag[1], table->LangSysRecord[i].LangSysTag[2], table->LangSysRecord[i].LangSysTag[3]);
2084
2085             for (j = 0; j < script->language_count; j++)
2086             {
2087                 if (script->languages[j].tag == tag)
2088                 {
2089                     script->languages[j].gpos_table = ((const BYTE*)table + offset);
2090                     break;
2091                 }
2092             }
2093             if (j == script->language_count)
2094             {
2095                 script->language_count++;
2096                 script->languages = HeapReAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,script->languages, sizeof(LoadedLanguage) * script->language_count);
2097                 script->languages[j].tag = tag;
2098                 script->languages[j].gpos_table = ((const BYTE*)table + offset);
2099             }
2100         }
2101     }
2102 }
2103
2104 static void _initialize_language_cache(LoadedScript *script)
2105 {
2106     if (!script->languages_initialized)
2107     {
2108         GSUB_initialize_language_cache(script);
2109         GPOS_expand_language_cache(script);
2110         script->languages_initialized = TRUE;
2111     }
2112 }
2113
2114 HRESULT OpenType_GetFontLanguageTags(ScriptCache *psc, OPENTYPE_TAG script_tag, OPENTYPE_TAG searchingFor, int cMaxTags, OPENTYPE_TAG *pLanguageTags, int *pcTags)
2115 {
2116     int i;
2117     HRESULT rc = S_OK;
2118     LoadedScript *script = NULL;
2119
2120     _initialize_script_cache(psc);
2121
2122     for (i = 0; i < psc->script_count; i++)
2123     {
2124          if (psc->scripts[i].tag == script_tag)
2125          {
2126             script = &psc->scripts[i];
2127             break;
2128          }
2129     }
2130
2131     if (!script)
2132         return E_INVALIDARG;
2133
2134     _initialize_language_cache(script);
2135
2136     if (!searchingFor && cMaxTags < script->language_count)
2137         rc = E_OUTOFMEMORY;
2138     else if (searchingFor)
2139         rc = E_INVALIDARG;
2140
2141     *pcTags = script->language_count;
2142
2143     for (i = 0; i < script->language_count; i++)
2144     {
2145         if (i < cMaxTags)
2146             pLanguageTags[i] = script->languages[i].tag;
2147
2148         if (searchingFor)
2149         {
2150             if (searchingFor == script->languages[i].tag)
2151             {
2152                 pLanguageTags[0] = script->languages[i].tag;
2153                 *pcTags = 1;
2154                 rc = S_OK;
2155                 break;
2156             }
2157         }
2158     }
2159
2160     if (script->default_language.gsub_table)
2161     {
2162         if (i < cMaxTags)
2163             pLanguageTags[i] = script->default_language.tag;
2164
2165         if (searchingFor  && FAILED(rc))
2166         {
2167             pLanguageTags[0] = script->default_language.tag;
2168         }
2169         i++;
2170         *pcTags = (*pcTags) + 1;
2171     }
2172
2173     return rc;
2174 }
2175
2176
2177 static void GSUB_initialize_feature_cache(LPCVOID table, LoadedLanguage *language)
2178 {
2179     int i;
2180
2181     if (language->gsub_table)
2182     {
2183         const OT_LangSys *lang = language->gsub_table;
2184         const GSUB_Header *header = (const GSUB_Header *)table;
2185         const OT_FeatureList *feature_list;
2186
2187         language->feature_count = GET_BE_WORD(lang->FeatureCount);
2188         TRACE("%i features\n",language->feature_count);
2189
2190         if (language->feature_count)
2191         {
2192             language->features = HeapAlloc(GetProcessHeap(),0,sizeof(LoadedFeature)*language->feature_count);
2193
2194             feature_list = (const OT_FeatureList*)((const BYTE*)header + GET_BE_WORD(header->FeatureList));
2195
2196             for (i = 0; i < language->feature_count; i++)
2197             {
2198                 const OT_Feature *feature;
2199                 int j;
2200                 int index = GET_BE_WORD(lang->FeatureIndex[i]);
2201
2202                 language->features[i].tag = MS_MAKE_TAG(feature_list->FeatureRecord[index].FeatureTag[0], feature_list->FeatureRecord[index].FeatureTag[1], feature_list->FeatureRecord[index].FeatureTag[2], feature_list->FeatureRecord[index].FeatureTag[3]);
2203                 language->features[i].feature = ((const BYTE*)feature_list + GET_BE_WORD(feature_list->FeatureRecord[index].Feature));
2204                 feature = (const OT_Feature*)language->features[i].feature;
2205                 language->features[i].lookup_count = GET_BE_WORD(feature->LookupCount);
2206                 language->features[i].lookups = HeapAlloc(GetProcessHeap(),0,sizeof(WORD) * language->features[i].lookup_count);
2207                 for (j = 0; j < language->features[i].lookup_count; j++)
2208                     language->features[i].lookups[j] = GET_BE_WORD(feature->LookupListIndex[j]);
2209                 language->features[i].tableType = FEATURE_GSUB_TABLE;
2210             }
2211         }
2212     }
2213 }
2214
2215 static void GPOS_expand_feature_cache(LPCVOID table, LoadedLanguage *language)
2216 {
2217     int i, count;
2218     const OT_LangSys *lang = language->gpos_table;
2219     const GPOS_Header *header = (const GPOS_Header *)table;
2220     const OT_FeatureList *feature_list;
2221
2222     if (!lang)
2223         return;
2224
2225     count = GET_BE_WORD(lang->FeatureCount);
2226     feature_list = (const OT_FeatureList*)((const BYTE*)header + GET_BE_WORD(header->FeatureList));
2227
2228     TRACE("%i features\n",count);
2229
2230     if (!count)
2231         return;
2232
2233     if (!language->feature_count)
2234     {
2235         language->feature_count = count;
2236
2237         if (language->feature_count)
2238         {
2239             language->features = HeapAlloc(GetProcessHeap(),0,sizeof(LoadedFeature)*language->feature_count);
2240
2241             for (i = 0; i < language->feature_count; i++)
2242             {
2243                 const OT_Feature *feature;
2244                 int j;
2245                 int index = GET_BE_WORD(lang->FeatureIndex[i]);
2246
2247                 language->features[i].tag = MS_MAKE_TAG(feature_list->FeatureRecord[index].FeatureTag[0], feature_list->FeatureRecord[index].FeatureTag[1], feature_list->FeatureRecord[index].FeatureTag[2], feature_list->FeatureRecord[index].FeatureTag[3]);
2248                 language->features[i].feature = ((const BYTE*)feature_list + GET_BE_WORD(feature_list->FeatureRecord[index].Feature));
2249                 feature = (const OT_Feature*)language->features[i].feature;
2250                 language->features[i].lookup_count = GET_BE_WORD(feature->LookupCount);
2251                 language->features[i].lookups = HeapAlloc(GetProcessHeap(),0,sizeof(WORD) * language->features[i].lookup_count);
2252                 for (j = 0; j < language->features[i].lookup_count; j++)
2253                     language->features[i].lookups[j] = GET_BE_WORD(feature->LookupListIndex[j]);
2254                 language->features[i].tableType = FEATURE_GPOS_TABLE;
2255             }
2256         }
2257     }
2258     else
2259     {
2260         language->features = HeapReAlloc(GetProcessHeap(),0,language->features, sizeof(LoadedFeature)*(language->feature_count + count));
2261
2262         for (i = 0; i < count; i++)
2263         {
2264             const OT_Feature *feature;
2265             int j;
2266             int index = GET_BE_WORD(lang->FeatureIndex[i]);
2267             int idx = language->feature_count + i;
2268
2269             language->features[idx].tag = MS_MAKE_TAG(feature_list->FeatureRecord[index].FeatureTag[0], feature_list->FeatureRecord[index].FeatureTag[1], feature_list->FeatureRecord[index].FeatureTag[2], feature_list->FeatureRecord[index].FeatureTag[3]);
2270             language->features[idx].feature = ((const BYTE*)feature_list + GET_BE_WORD(feature_list->FeatureRecord[index].Feature));
2271             feature = (const OT_Feature*)language->features[idx].feature;
2272             language->features[idx].lookup_count = GET_BE_WORD(feature->LookupCount);
2273             language->features[idx].lookups = HeapAlloc(GetProcessHeap(),0,sizeof(WORD) * language->features[idx].lookup_count);
2274             for (j = 0; j < language->features[idx].lookup_count; j++)
2275                 language->features[idx].lookups[j] = GET_BE_WORD(feature->LookupListIndex[j]);
2276             language->features[idx].tableType = FEATURE_GPOS_TABLE;
2277         }
2278         language->feature_count += count;
2279     }
2280 }
2281
2282 static void _initialize_feature_cache(ScriptCache *psc, LoadedLanguage *language)
2283 {
2284     if (!language->features_initialized)
2285     {
2286         GSUB_initialize_feature_cache(psc->GSUB_Table, language);
2287         GPOS_expand_feature_cache(psc->GPOS_Table, language);
2288         language->features_initialized = TRUE;
2289     }
2290 }
2291
2292 HRESULT OpenType_GetFontFeatureTags(ScriptCache *psc, OPENTYPE_TAG script_tag, OPENTYPE_TAG language_tag, BOOL filtered, OPENTYPE_TAG searchingFor, char tableType, int cMaxTags, OPENTYPE_TAG *pFeatureTags, int *pcTags, LoadedFeature** feature)
2293 {
2294     int i;
2295     HRESULT rc = S_OK;
2296     LoadedScript *script = NULL;
2297     LoadedLanguage *language = NULL;
2298
2299     _initialize_script_cache(psc);
2300
2301     for (i = 0; i < psc->script_count; i++)
2302     {
2303         if (psc->scripts[i].tag == script_tag)
2304         {
2305             script = &psc->scripts[i];
2306             break;
2307         }
2308     }
2309
2310     if (!script)
2311     {
2312         *pcTags = 0;
2313         if (!filtered)
2314             return S_OK;
2315         else
2316             return E_INVALIDARG;
2317     }
2318
2319     _initialize_language_cache(script);
2320
2321     if ((script->default_language.gsub_table || script->default_language.gpos_table) && script->default_language.tag == language_tag)
2322         language = &script->default_language;
2323     else
2324     {
2325         for (i = 0; i < script->language_count; i++)
2326         {
2327             if (script->languages[i].tag == language_tag)
2328             {
2329                 language = &script->languages[i];
2330                 break;
2331             }
2332         }
2333     }
2334
2335     if (!language)
2336     {
2337         *pcTags = 0;
2338         return S_OK;
2339     }
2340
2341     _initialize_feature_cache(psc, language);
2342
2343     if (tableType)
2344     {
2345         *pcTags = 0;
2346         for (i = 0; i < language->feature_count; i++)
2347             if (language->features[i].tableType == tableType)
2348                 *pcTags = (*pcTags)+1;
2349     }
2350     else
2351         *pcTags = language->feature_count;
2352
2353     if (!searchingFor && cMaxTags < *pcTags)
2354         rc = E_OUTOFMEMORY;
2355     else if (searchingFor)
2356         rc = E_INVALIDARG;
2357
2358     for (i = 0; i < language->feature_count; i++)
2359     {
2360         if (i < cMaxTags)
2361         {
2362             if (!tableType || language->features[i].tableType == tableType)
2363                 pFeatureTags[i] = language->features[i].tag;
2364         }
2365
2366         if (searchingFor)
2367         {
2368             if ((searchingFor == language->features[i].tag) &&
2369                 (!tableType || language->features[i].tableType == tableType))
2370             {
2371                 pFeatureTags[0] = language->features[i].tag;
2372                 *pcTags = 1;
2373                 if (feature)
2374                     *feature = &language->features[i];
2375                 rc = S_OK;
2376                 break;
2377             }
2378         }
2379     }
2380     return rc;
2381 }