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crypt32: List allowed characters instead of relying on wctype properties.
[wine.git] / dlls / usp10 / opentype.c
bloba6ce76072d99af654afaeaeaac14194e7d1c77bb
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 #include <stdarg.h>
22 #include <stdlib.h>
23
24 #include "windef.h"
25 #include "winbase.h"
26 #include "wingdi.h"
27 #include "winuser.h"
28 #include "winnls.h"
29 #include "usp10.h"
30 #include "winternl.h"
31
32 #include "usp10_internal.h"
33
34 #include "wine/debug.h"
35 #include "wine/heap.h"
36
37 WINE_DEFAULT_DEBUG_CHANNEL(uniscribe);
38
39 #ifdef WORDS_BIGENDIAN
40 #define GET_BE_WORD(x) (x)
41 #define GET_BE_DWORD(x) (x)
42 #else
43 #define GET_BE_WORD(x) RtlUshortByteSwap(x)
44 #define GET_BE_DWORD(x) RtlUlongByteSwap(x)
45 #endif
46
47 #define round(x) (((x) < 0) ? (int)((x) - 0.5) : (int)((x) + 0.5))
48
49 /* These are all structures needed for the cmap format 12 table */
50 #define CMAP_TAG MS_MAKE_TAG('c', 'm', 'a', 'p')
51
52 enum gpos_lookup_type
53 {
54 GPOS_LOOKUP_ADJUST_SINGLE = 0x1,
55 GPOS_LOOKUP_ADJUST_PAIR = 0x2,
56 GPOS_LOOKUP_ATTACH_CURSIVE = 0x3,
57 GPOS_LOOKUP_ATTACH_MARK_TO_BASE = 0x4,
58 GPOS_LOOKUP_ATTACH_MARK_TO_LIGATURE = 0x5,
59 GPOS_LOOKUP_ATTACH_MARK_TO_MARK = 0x6,
60 GPOS_LOOKUP_POSITION_CONTEXT = 0x7,
61 GPOS_LOOKUP_POSITION_CONTEXT_CHAINED = 0x8,
62 GPOS_LOOKUP_POSITION_EXTENSION = 0x9,
63 };
64
65 enum gsub_lookup_type
66 {
67 GSUB_LOOKUP_SINGLE = 0x1,
68 GSUB_LOOKUP_MULTIPLE = 0x2,
69 GSUB_LOOKUP_ALTERNATE = 0x3,
70 GSUB_LOOKUP_LIGATURE = 0x4,
71 GSUB_LOOKUP_CONTEXT = 0x5,
72 GSUB_LOOKUP_CONTEXT_CHAINED = 0x6,
73 GSUB_LOOKUP_EXTENSION = 0x7,
74 GSUB_LOOKUP_CONTEXT_CHAINED_REVERSE = 0x8,
75 };
76
77 typedef struct {
78 WORD platformID;
79 WORD encodingID;
80 DWORD offset;
81 } CMAP_EncodingRecord;
82
83 typedef struct {
84 WORD version;
85 WORD numTables;
86 CMAP_EncodingRecord tables[1];
87 } CMAP_Header;
88
89 typedef struct {
90 DWORD startCharCode;
91 DWORD endCharCode;
92 DWORD startGlyphID;
93 } CMAP_SegmentedCoverage_group;
94
95 typedef struct {
96 WORD format;
97 WORD reserved;
98 DWORD length;
99 DWORD language;
100 DWORD nGroups;
101 CMAP_SegmentedCoverage_group groups[1];
102 } CMAP_SegmentedCoverage;
103
104 /* These are all structures needed for the GDEF table */
105 enum {BaseGlyph=1, LigatureGlyph, MarkGlyph, ComponentGlyph};
106
107 typedef struct {
108 DWORD Version;
109 WORD GlyphClassDef;
110 WORD AttachList;
111 WORD LigCaretList;
112 WORD MarkAttachClassDef;
113 } GDEF_Header;
114
115 typedef struct {
116 WORD ClassFormat;
117 WORD StartGlyph;
118 WORD GlyphCount;
119 WORD ClassValueArray[1];
120 } OT_ClassDefFormat1;
121
122 typedef struct {
123 WORD Start;
124 WORD End;
125 WORD Class;
126 } OT_ClassRangeRecord;
127
128 typedef struct {
129 WORD ClassFormat;
130 WORD ClassRangeCount;
131 OT_ClassRangeRecord ClassRangeRecord[1];
132 } OT_ClassDefFormat2;
133
134 /* These are all structures needed for the GSUB table */
135
136 typedef struct {
137 DWORD version;
138 WORD ScriptList;
139 WORD FeatureList;
140 WORD LookupList;
141 } GSUB_Header;
142
143 typedef struct {
144 CHAR ScriptTag[4];
145 WORD Script;
146 } OT_ScriptRecord;
147
148 typedef struct {
149 WORD ScriptCount;
150 OT_ScriptRecord ScriptRecord[1];
151 } OT_ScriptList;
152
153 typedef struct {
154 CHAR LangSysTag[4];
155 WORD LangSys;
156 } OT_LangSysRecord;
157
158 typedef struct {
159 WORD DefaultLangSys;
160 WORD LangSysCount;
161 OT_LangSysRecord LangSysRecord[1];
162 } OT_Script;
163
164 typedef struct {
165 WORD LookupOrder; /* Reserved */
166 WORD ReqFeatureIndex;
167 WORD FeatureCount;
168 WORD FeatureIndex[1];
169 } OT_LangSys;
170
171 typedef struct {
172 CHAR FeatureTag[4];
173 WORD Feature;
174 } OT_FeatureRecord;
175
176 typedef struct {
177 WORD FeatureCount;
178 OT_FeatureRecord FeatureRecord[1];
179 } OT_FeatureList;
180
181 typedef struct {
182 WORD FeatureParams; /* Reserved */
183 WORD LookupCount;
184 WORD LookupListIndex[1];
185 } OT_Feature;
186
187 typedef struct {
188 WORD LookupCount;
189 WORD Lookup[1];
190 } OT_LookupList;
191
192 typedef struct {
193 WORD LookupType;
194 WORD LookupFlag;
195 WORD SubTableCount;
196 WORD SubTable[1];
197 } OT_LookupTable;
198
199 typedef struct {
200 WORD CoverageFormat;
201 WORD GlyphCount;
202 WORD GlyphArray[1];
203 } OT_CoverageFormat1;
204
205 typedef struct {
206 WORD Start;
207 WORD End;
208 WORD StartCoverageIndex;
209 } OT_RangeRecord;
210
211 typedef struct {
212 WORD CoverageFormat;
213 WORD RangeCount;
214 OT_RangeRecord RangeRecord[1];
215 } OT_CoverageFormat2;
216
217 typedef struct {
218 WORD SubstFormat; /* = 1 */
219 WORD Coverage;
220 WORD DeltaGlyphID;
221 } GSUB_SingleSubstFormat1;
222
223 typedef struct {
224 WORD SubstFormat; /* = 2 */
225 WORD Coverage;
226 WORD GlyphCount;
227 WORD Substitute[1];
228 }GSUB_SingleSubstFormat2;
229
230 typedef struct {
231 WORD SubstFormat; /* = 1 */
232 WORD Coverage;
233 WORD SequenceCount;
234 WORD Sequence[1];
235 }GSUB_MultipleSubstFormat1;
236
237 typedef struct {
238 WORD GlyphCount;
239 WORD Substitute[1];
240 }GSUB_Sequence;
241
242 typedef struct {
243 WORD SubstFormat; /* = 1 */
244 WORD Coverage;
245 WORD LigSetCount;
246 WORD LigatureSet[1];
247 }GSUB_LigatureSubstFormat1;
248
249 typedef struct {
250 WORD LigatureCount;
251 WORD Ligature[1];
252 }GSUB_LigatureSet;
253
254 typedef struct{
255 WORD LigGlyph;
256 WORD CompCount;
257 WORD Component[1];
258 }GSUB_Ligature;
259
260 typedef struct{
261 WORD SequenceIndex;
262 WORD LookupListIndex;
263
264 }GSUB_SubstLookupRecord;
265
266 typedef struct{
267 WORD SubstFormat;
268 WORD Coverage;
269 WORD SubRuleSetCount;
270 WORD SubRuleSet[1];
271 }GSUB_ContextSubstFormat1;
272
273 typedef struct{
274 WORD SubRuleCount;
275 WORD SubRule[1];
276 }GSUB_SubRuleSet;
277
278 typedef struct {
279 WORD GlyphCount;
280 WORD SubstCount;
281 WORD Input[1];
282 }GSUB_SubRule_1;
283
284 typedef struct {
285 GSUB_SubstLookupRecord SubstLookupRecord[1];
286 }GSUB_SubRule_2;
287
288 typedef struct {
289 WORD SubstFormat;
290 WORD Coverage;
291 WORD ClassDef;
292 WORD SubClassSetCnt;
293 WORD SubClassSet[1];
294 }GSUB_ContextSubstFormat2;
295
296 typedef struct {
297 WORD SubClassRuleCnt;
298 WORD SubClassRule[1];
299 }GSUB_SubClassSet;
300
301 typedef struct {
302 WORD GlyphCount;
303 WORD SubstCount;
304 WORD Class[1];
305 }GSUB_SubClassRule_1;
306
307 typedef struct {
308 GSUB_SubstLookupRecord SubstLookupRecord[1];
309 }GSUB_SubClassRule_2;
310
311 typedef struct{
312 WORD SubstFormat; /* = 1 */
313 WORD Coverage;
314 WORD ChainSubRuleSetCount;
315 WORD ChainSubRuleSet[1];
316 }GSUB_ChainContextSubstFormat1;
317
318 typedef struct {
319 WORD SubstFormat; /* = 2 */
320 WORD Coverage;
321 WORD BacktrackClassDef;
322 WORD InputClassDef;
323 WORD LookaheadClassDef;
324 WORD ChainSubClassSetCnt;
325 WORD ChainSubClassSet[1];
326 }GSUB_ChainContextSubstFormat2;
327
328 typedef struct {
329 WORD ChainSubClassRuleCnt;
330 WORD ChainSubClassRule[1];
331 }GSUB_ChainSubClassSet;
332
333 typedef struct {
334 WORD BacktrackGlyphCount;
335 WORD Backtrack[1];
336 }GSUB_ChainSubClassRule_1;
337
338 typedef struct {
339 WORD InputGlyphCount;
340 WORD Input[1];
341 }GSUB_ChainSubClassRule_2;
342
343 typedef struct {
344 WORD LookaheadGlyphCount;
345 WORD LookAhead[1];
346 }GSUB_ChainSubClassRule_3;
347
348 typedef struct {
349 WORD SubstCount;
350 GSUB_SubstLookupRecord SubstLookupRecord[1];
351 }GSUB_ChainSubClassRule_4;
352
353 typedef struct {
354 WORD SubstFormat; /* = 3 */
355 WORD BacktrackGlyphCount;
356 WORD Coverage[1];
357 }GSUB_ChainContextSubstFormat3_1;
358
359 typedef struct{
360 WORD InputGlyphCount;
361 WORD Coverage[1];
362 }GSUB_ChainContextSubstFormat3_2;
363
364 typedef struct{
365 WORD LookaheadGlyphCount;
366 WORD Coverage[1];
367 }GSUB_ChainContextSubstFormat3_3;
368
369 typedef struct{
370 WORD SubstCount;
371 GSUB_SubstLookupRecord SubstLookupRecord[1];
372 }GSUB_ChainContextSubstFormat3_4;
373
374 typedef struct {
375 WORD SubstFormat; /* = 1 */
376 WORD Coverage;
377 WORD AlternateSetCount;
378 WORD AlternateSet[1];
379 } GSUB_AlternateSubstFormat1;
380
381 typedef struct{
382 WORD GlyphCount;
383 WORD Alternate[1];
384 } GSUB_AlternateSet;
385
386 typedef struct {
387 WORD SubstFormat;
388 WORD ExtensionLookupType;
389 DWORD ExtensionOffset;
390 } GSUB_ExtensionPosFormat1;
391
392 /* These are all structures needed for the GPOS table */
393
394 typedef struct {
395 DWORD version;
396 WORD ScriptList;
397 WORD FeatureList;
398 WORD LookupList;
399 } GPOS_Header;
400
401 typedef struct {
402 WORD StartSize;
403 WORD EndSize;
404 WORD DeltaFormat;
405 WORD DeltaValue[1];
406 } OT_DeviceTable;
407
408 typedef struct {
409 WORD AnchorFormat;
410 WORD XCoordinate;
411 WORD YCoordinate;
412 } GPOS_AnchorFormat1;
413
414 typedef struct {
415 WORD AnchorFormat;
416 WORD XCoordinate;
417 WORD YCoordinate;
418 WORD AnchorPoint;
419 } GPOS_AnchorFormat2;
420
421 typedef struct {
422 WORD AnchorFormat;
423 WORD XCoordinate;
424 WORD YCoordinate;
425 WORD XDeviceTable;
426 WORD YDeviceTable;
427 } GPOS_AnchorFormat3;
428
429 typedef struct {
430 WORD XPlacement;
431 WORD YPlacement;
432 WORD XAdvance;
433 WORD YAdvance;
434 WORD XPlaDevice;
435 WORD YPlaDevice;
436 WORD XAdvDevice;
437 WORD YAdvDevice;
438 } GPOS_ValueRecord;
439
440 typedef struct {
441 WORD PosFormat;
442 WORD Coverage;
443 WORD ValueFormat;
444 WORD Value[1];
445 } GPOS_SinglePosFormat1;
446
447 typedef struct {
448 WORD PosFormat;
449 WORD Coverage;
450 WORD ValueFormat;
451 WORD ValueCount;
452 WORD Value[1];
453 } GPOS_SinglePosFormat2;
454
455 typedef struct {
456 WORD PosFormat;
457 WORD Coverage;
458 WORD ValueFormat1;
459 WORD ValueFormat2;
460 WORD PairSetCount;
461 WORD PairSetOffset[1];
462 } GPOS_PairPosFormat1;
463
464 typedef struct {
465 WORD PosFormat;
466 WORD Coverage;
467 WORD ValueFormat1;
468 WORD ValueFormat2;
469 WORD ClassDef1;
470 WORD ClassDef2;
471 WORD Class1Count;
472 WORD Class2Count;
473 WORD Class1Record[1];
474 } GPOS_PairPosFormat2;
475
476 typedef struct {
477 WORD SecondGlyph;
478 WORD Value1[1];
479 WORD Value2[1];
480 } GPOS_PairValueRecord;
481
482 typedef struct {
483 WORD PairValueCount;
484 GPOS_PairValueRecord PairValueRecord[1];
485 } GPOS_PairSet;
486
487 typedef struct {
488 WORD EntryAnchor;
489 WORD ExitAnchor;
490 } GPOS_EntryExitRecord;
491
492 typedef struct {
493 WORD PosFormat;
494 WORD Coverage;
495 WORD EntryExitCount;
496 GPOS_EntryExitRecord EntryExitRecord[1];
497 } GPOS_CursivePosFormat1;
498
499 typedef struct {
500 WORD PosFormat;
501 WORD MarkCoverage;
502 WORD BaseCoverage;
503 WORD ClassCount;
504 WORD MarkArray;
505 WORD BaseArray;
506 } GPOS_MarkBasePosFormat1;
507
508 typedef struct {
509 WORD BaseAnchor[1];
510 } GPOS_BaseRecord;
511
512 typedef struct {
513 WORD BaseCount;
514 GPOS_BaseRecord BaseRecord[1];
515 } GPOS_BaseArray;
516
517 typedef struct {
518 WORD Class;
519 WORD MarkAnchor;
520 } GPOS_MarkRecord;
521
522 typedef struct {
523 WORD MarkCount;
524 GPOS_MarkRecord MarkRecord[1];
525 } GPOS_MarkArray;
526
527 typedef struct {
528 WORD PosFormat;
529 WORD MarkCoverage;
530 WORD LigatureCoverage;
531 WORD ClassCount;
532 WORD MarkArray;
533 WORD LigatureArray;
534 } GPOS_MarkLigPosFormat1;
535
536 typedef struct {
537 WORD LigatureCount;
538 WORD LigatureAttach[1];
539 } GPOS_LigatureArray;
540
541 typedef struct {
542 WORD LigatureAnchor[1];
543 } GPOS_ComponentRecord;
544
545 typedef struct {
546 WORD ComponentCount;
547 GPOS_ComponentRecord ComponentRecord[1];
548 } GPOS_LigatureAttach;
549
550 typedef struct {
551 WORD PosFormat;
552 WORD Mark1Coverage;
553 WORD Mark2Coverage;
554 WORD ClassCount;
555 WORD Mark1Array;
556 WORD Mark2Array;
557 } GPOS_MarkMarkPosFormat1;
558
559 typedef struct {
560 WORD Mark2Anchor[1];
561 } GPOS_Mark2Record;
562
563 typedef struct {
564 WORD Mark2Count;
565 GPOS_Mark2Record Mark2Record[1];
566 } GPOS_Mark2Array;
567
568 typedef struct {
569 WORD SequenceIndex;
570 WORD LookupListIndex;
571 } GPOS_PosLookupRecord;
572
573 typedef struct {
574 WORD PosFormat;
575 WORD Coverage;
576 WORD ClassDef;
577 WORD PosClassSetCnt;
578 WORD PosClassSet[1];
579 } GPOS_ContextPosFormat2;
580
581 typedef struct {
582 WORD PosClassRuleCnt;
583 WORD PosClassRule[1];
584 } GPOS_PosClassSet;
585
586 typedef struct {
587 WORD GlyphCount;
588 WORD PosCount;
589 WORD Class[1];
590 } GPOS_PosClassRule_1;
591
592 typedef struct {
593 GPOS_PosLookupRecord PosLookupRecord[1];
594 } GPOS_PosClassRule_2;
595
596 typedef struct {
597 WORD PosFormat;
598 WORD BacktrackGlyphCount;
599 WORD Coverage[1];
600 } GPOS_ChainContextPosFormat3_1;
601
602 typedef struct {
603 WORD InputGlyphCount;
604 WORD Coverage[1];
605 } GPOS_ChainContextPosFormat3_2;
606
607 typedef struct {
608 WORD LookaheadGlyphCount;
609 WORD Coverage[1];
610 } GPOS_ChainContextPosFormat3_3;
611
612 typedef struct {
613 WORD PosCount;
614 GPOS_PosLookupRecord PosLookupRecord[1];
615 } GPOS_ChainContextPosFormat3_4;
616
617 typedef struct {
618 WORD PosFormat;
619 WORD ExtensionLookupType;
620 DWORD ExtensionOffset;
621 } GPOS_ExtensionPosFormat1;
622
623 /**********
624 * CMAP
625 **********/
626
627 static VOID *load_CMAP_format12_table(HDC hdc, ScriptCache *psc)
628 {
629 CMAP_Header *CMAP_Table = NULL;
630 int length;
631 int i;
632
633 if (!psc->CMAP_Table)
634 {
635 length = GetFontData(hdc, CMAP_TAG , 0, NULL, 0);
636 if (length != GDI_ERROR)
637 {
638 psc->CMAP_Table = heap_alloc(length);
639 GetFontData(hdc, CMAP_TAG , 0, psc->CMAP_Table, length);
640 TRACE("Loaded cmap table of %i bytes\n",length);
641 }
642 else
643 return NULL;
644 }
645
646 CMAP_Table = psc->CMAP_Table;
647
648 for (i = 0; i < GET_BE_WORD(CMAP_Table->numTables); i++)
649 {
650 if ( (GET_BE_WORD(CMAP_Table->tables[i].platformID) == 3) &&
651 (GET_BE_WORD(CMAP_Table->tables[i].encodingID) == 10) )
652 {
653 CMAP_SegmentedCoverage *format = (CMAP_SegmentedCoverage*)(((BYTE*)CMAP_Table) + GET_BE_DWORD(CMAP_Table->tables[i].offset));
654 if (GET_BE_WORD(format->format) == 12)
655 return format;
656 }
657 }
658 return NULL;
659 }
660
661 static int __cdecl compare_group(const void *a, const void* b)
662 {
663 const DWORD *chr = a;
664 const CMAP_SegmentedCoverage_group *group = b;
665
666 if (*chr < GET_BE_DWORD(group->startCharCode))
667 return -1;
668 if (*chr > GET_BE_DWORD(group->endCharCode))
669 return 1;
670 return 0;
671 }
672
673 DWORD OpenType_CMAP_GetGlyphIndex(HDC hdc, ScriptCache *psc, DWORD utf32c, WORD *glyph_index, DWORD flags)
674 {
675 /* BMP: use gdi32 for ease */
676 if (utf32c < 0x10000)
677 {
678 WCHAR ch = utf32c;
679 return GetGlyphIndicesW(hdc, &ch, 1, glyph_index, flags);
680 }
681
682 if (!psc->CMAP_format12_Table)
683 psc->CMAP_format12_Table = load_CMAP_format12_table(hdc, psc);
684
685 if (flags & GGI_MARK_NONEXISTING_GLYPHS)
686 *glyph_index = 0xffffu;
687 else
688 *glyph_index = 0u;
689
690 if (psc->CMAP_format12_Table)
691 {
692 CMAP_SegmentedCoverage *format = NULL;
693 CMAP_SegmentedCoverage_group *group = NULL;
694
695 format = (CMAP_SegmentedCoverage *)psc->CMAP_format12_Table;
696
697 group = bsearch(&utf32c, format->groups, GET_BE_DWORD(format->nGroups),
698 sizeof(CMAP_SegmentedCoverage_group), compare_group);
699
700 if (group)
701 {
702 DWORD offset = utf32c - GET_BE_DWORD(group->startCharCode);
703 *glyph_index = GET_BE_DWORD(group->startGlyphID) + offset;
704 return 0;
705 }
706 }
707 return 0;
708 }
709
710 /**********
711 * GDEF
712 **********/
713
714 static WORD OT_get_glyph_class(const void *table, WORD glyph)
715 {
716 WORD class = 0;
717 const OT_ClassDefFormat1 *cf1 = table;
718
719 if (!table) return 0;
720
721 if (GET_BE_WORD(cf1->ClassFormat) == 1)
722 {
723 if (glyph >= GET_BE_WORD(cf1->StartGlyph))
724 {
725 int index = glyph - GET_BE_WORD(cf1->StartGlyph);
726 if (index < GET_BE_WORD(cf1->GlyphCount))
727 class = GET_BE_WORD(cf1->ClassValueArray[index]);
728 }
729 }
730 else if (GET_BE_WORD(cf1->ClassFormat) == 2)
731 {
732 const OT_ClassDefFormat2 *cf2 = table;
733 int i, top;
734 top = GET_BE_WORD(cf2->ClassRangeCount);
735 for (i = 0; i < top; i++)
736 {
737 if (glyph >= GET_BE_WORD(cf2->ClassRangeRecord[i].Start) &&
738 glyph <= GET_BE_WORD(cf2->ClassRangeRecord[i].End))
739 {
740 class = GET_BE_WORD(cf2->ClassRangeRecord[i].Class);
741 break;
742 }
743 }
744 }
745 else
746 ERR("Unknown Class Format %i\n",GET_BE_WORD(cf1->ClassFormat));
747
748 return class;
749 }
750
751 void OpenType_GDEF_UpdateGlyphProps(ScriptCache *psc, const WORD *pwGlyphs, const WORD cGlyphs, WORD* pwLogClust, const WORD cChars, SCRIPT_GLYPHPROP *pGlyphProp)
752 {
753 int i;
754 void *glyph_class_table = NULL;
755
756 if (psc->GDEF_Table)
757 {
758 const GDEF_Header *header = psc->GDEF_Table;
759 WORD offset = GET_BE_WORD( header->GlyphClassDef );
760 if (offset)
761 glyph_class_table = (BYTE *)psc->GDEF_Table + offset;
762 }
763
764 for (i = 0; i < cGlyphs; i++)
765 {
766 WORD class;
767 int char_count = 0;
768 int k;
769
770 k = USP10_FindGlyphInLogClust(pwLogClust, cChars, i);
771 if (k >= 0)
772 {
773 for (; k < cChars && pwLogClust[k] == i; k++)
774 char_count++;
775 }
776
777 class = OT_get_glyph_class( glyph_class_table, pwGlyphs[i] );
778
779 switch (class)
780 {
781 case 0:
782 case BaseGlyph:
783 pGlyphProp[i].sva.fClusterStart = 1;
784 pGlyphProp[i].sva.fDiacritic = 0;
785 pGlyphProp[i].sva.fZeroWidth = 0;
786 break;
787 case LigatureGlyph:
788 pGlyphProp[i].sva.fClusterStart = 1;
789 pGlyphProp[i].sva.fDiacritic = 0;
790 pGlyphProp[i].sva.fZeroWidth = 0;
791 break;
792 case MarkGlyph:
793 pGlyphProp[i].sva.fClusterStart = 0;
794 pGlyphProp[i].sva.fDiacritic = 1;
795 pGlyphProp[i].sva.fZeroWidth = 1;
796 break;
797 case ComponentGlyph:
798 pGlyphProp[i].sva.fClusterStart = 0;
799 pGlyphProp[i].sva.fDiacritic = 0;
800 pGlyphProp[i].sva.fZeroWidth = 0;
801 break;
802 default:
803 ERR("Unknown glyph class %i\n",class);
804 pGlyphProp[i].sva.fClusterStart = 1;
805 pGlyphProp[i].sva.fDiacritic = 0;
806 pGlyphProp[i].sva.fZeroWidth = 0;
807 }
808
809 if (char_count == 0)
810 pGlyphProp[i].sva.fClusterStart = 0;
811 }
812 }
813
814 /**********
815 * GSUB
816 **********/
817 static INT GSUB_apply_lookup(const OT_LookupList* lookup, INT lookup_index, WORD *glyphs, INT glyph_index, INT write_dir, INT *glyph_count);
818
819 static int GSUB_is_glyph_covered(const void *table, unsigned int glyph)
820 {
821 const OT_CoverageFormat1* cf1;
822
823 cf1 = table;
824
825 if (GET_BE_WORD(cf1->CoverageFormat) == 1)
826 {
827 int count = GET_BE_WORD(cf1->GlyphCount);
828 int i;
829 TRACE("Coverage Format 1, %i glyphs\n",count);
830 for (i = 0; i < count; i++)
831 if (glyph == GET_BE_WORD(cf1->GlyphArray[i]))
832 return i;
833 return -1;
834 }
835 else if (GET_BE_WORD(cf1->CoverageFormat) == 2)
836 {
837 const OT_CoverageFormat2* cf2;
838 int i;
839 int count;
840 cf2 = (const OT_CoverageFormat2*)cf1;
841
842 count = GET_BE_WORD(cf2->RangeCount);
843 TRACE("Coverage Format 2, %i ranges\n",count);
844 for (i = 0; i < count; i++)
845 {
846 if (glyph < GET_BE_WORD(cf2->RangeRecord[i].Start))
847 return -1;
848 if ((glyph >= GET_BE_WORD(cf2->RangeRecord[i].Start)) &&
849 (glyph <= GET_BE_WORD(cf2->RangeRecord[i].End)))
850 {
851 return (GET_BE_WORD(cf2->RangeRecord[i].StartCoverageIndex) +
852 glyph - GET_BE_WORD(cf2->RangeRecord[i].Start));
853 }
854 }
855 return -1;
856 }
857 else
858 ERR("Unknown CoverageFormat %i\n",GET_BE_WORD(cf1->CoverageFormat));
859
860 return -1;
861 }
862
863 static const BYTE *GSUB_get_subtable(const OT_LookupTable *look, int index)
864 {
865 int offset = GET_BE_WORD(look->SubTable[index]);
866
867 if (GET_BE_WORD(look->LookupType) == GSUB_LOOKUP_EXTENSION)
868 {
869 const GSUB_ExtensionPosFormat1 *ext = (const GSUB_ExtensionPosFormat1 *)((const BYTE *)look + offset);
870 if (GET_BE_WORD(ext->SubstFormat) == 1)
871 {
872 offset += GET_BE_DWORD(ext->ExtensionOffset);
873 }
874 else
875 {
876 FIXME("Unhandled Extension Substitution Format %i\n",GET_BE_WORD(ext->SubstFormat));
877 }
878 }
879 return (const BYTE *)look + offset;
880 }
881
882 static INT GSUB_apply_SingleSubst(const OT_LookupTable *look, WORD *glyphs, INT glyph_index, INT write_dir, INT *glyph_count)
883 {
884 int j;
885 TRACE("Single Substitution Subtable\n");
886
887 for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++)
888 {
889 const GSUB_SingleSubstFormat1 *ssf1 = (const GSUB_SingleSubstFormat1*)GSUB_get_subtable(look, j);
890 if (GET_BE_WORD(ssf1->SubstFormat) == 1)
891 {
892 int offset = GET_BE_WORD(ssf1->Coverage);
893 TRACE(" subtype 1, delta %i\n", GET_BE_WORD(ssf1->DeltaGlyphID));
894 if (GSUB_is_glyph_covered((const BYTE*)ssf1+offset, glyphs[glyph_index]) != -1)
895 {
896 TRACE(" Glyph 0x%x ->",glyphs[glyph_index]);
897 glyphs[glyph_index] = glyphs[glyph_index] + GET_BE_WORD(ssf1->DeltaGlyphID);
898 TRACE(" 0x%x\n",glyphs[glyph_index]);
899 return glyph_index + write_dir;
900 }
901 }
902 else
903 {
904 const GSUB_SingleSubstFormat2 *ssf2;
905 INT index;
906 INT offset;
907
908 ssf2 = (const GSUB_SingleSubstFormat2 *)ssf1;
909 offset = GET_BE_WORD(ssf1->Coverage);
910 TRACE(" subtype 2, glyph count %i\n", GET_BE_WORD(ssf2->GlyphCount));
911 index = GSUB_is_glyph_covered((const BYTE*)ssf2+offset, glyphs[glyph_index]);
912 TRACE(" Coverage index %i\n",index);
913 if (index != -1)
914 {
915 if (glyphs[glyph_index] == GET_BE_WORD(ssf2->Substitute[index]))
916 return GSUB_E_NOGLYPH;
917
918 TRACE(" Glyph is 0x%x ->",glyphs[glyph_index]);
919 glyphs[glyph_index] = GET_BE_WORD(ssf2->Substitute[index]);
920 TRACE("0x%x\n",glyphs[glyph_index]);
921 return glyph_index + write_dir;
922 }
923 }
924 }
925 return GSUB_E_NOGLYPH;
926 }
927
928 static INT GSUB_apply_MultipleSubst(const OT_LookupTable *look, WORD *glyphs, INT glyph_index, INT write_dir, INT *glyph_count)
929 {
930 int j;
931 TRACE("Multiple Substitution Subtable\n");
932
933 for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++)
934 {
935 int offset, index;
936 const GSUB_MultipleSubstFormat1 *msf1;
937 msf1 = (const GSUB_MultipleSubstFormat1*)GSUB_get_subtable(look, j);
938
939 offset = GET_BE_WORD(msf1->Coverage);
940 index = GSUB_is_glyph_covered((const BYTE*)msf1+offset, glyphs[glyph_index]);
941 if (index != -1)
942 {
943 const GSUB_Sequence *seq;
944 int sub_count;
945 int j;
946 offset = GET_BE_WORD(msf1->Sequence[index]);
947 seq = (const GSUB_Sequence*)((const BYTE*)msf1+offset);
948 sub_count = GET_BE_WORD(seq->GlyphCount);
949 TRACE(" Glyph 0x%x (+%i)->",glyphs[glyph_index],(sub_count-1));
950
951 for (j = (*glyph_count)+(sub_count-1); j > glyph_index; j--)
952 glyphs[j] =glyphs[j-(sub_count-1)];
953
954 for (j = 0; j < sub_count; j++)
955 if (write_dir < 0)
956 glyphs[glyph_index + (sub_count-1) - j] = GET_BE_WORD(seq->Substitute[j]);
957 else
958 glyphs[glyph_index + j] = GET_BE_WORD(seq->Substitute[j]);
959
960 *glyph_count = *glyph_count + (sub_count - 1);
961
962 if (TRACE_ON(uniscribe))
963 {
964 for (j = 0; j < sub_count; j++)
965 TRACE(" 0x%x",glyphs[glyph_index+j]);
966 TRACE("\n");
967 }
968
969 if (write_dir > 0)
970 return glyph_index + sub_count;
971 else
972 return glyph_index - 1;
973 }
974 }
975 return GSUB_E_NOGLYPH;
976 }
977
978 static INT GSUB_apply_AlternateSubst(const OT_LookupTable *look, WORD *glyphs, INT glyph_index, INT write_dir, INT *glyph_count)
979 {
980 int j;
981 TRACE("Alternate Substitution Subtable\n");
982
983 for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++)
984 {
985 int offset;
986 const GSUB_AlternateSubstFormat1 *asf1;
987 INT index;
988
989 asf1 = (const GSUB_AlternateSubstFormat1*)GSUB_get_subtable(look, j);
990 offset = GET_BE_WORD(asf1->Coverage);
991
992 index = GSUB_is_glyph_covered((const BYTE*)asf1+offset, glyphs[glyph_index]);
993 if (index != -1)
994 {
995 const GSUB_AlternateSet *as;
996 offset = GET_BE_WORD(asf1->AlternateSet[index]);
997 as = (const GSUB_AlternateSet*)((const BYTE*)asf1+offset);
998 FIXME("%i alternates, picking index 0\n",GET_BE_WORD(as->GlyphCount));
999 if (glyphs[glyph_index] == GET_BE_WORD(as->Alternate[0]))
1000 return GSUB_E_NOGLYPH;
1001
1002 TRACE(" Glyph 0x%x ->",glyphs[glyph_index]);
1003 glyphs[glyph_index] = GET_BE_WORD(as->Alternate[0]);
1004 TRACE(" 0x%x\n",glyphs[glyph_index]);
1005 return glyph_index + write_dir;
1006 }
1007 }
1008 return GSUB_E_NOGLYPH;
1009 }
1010
1011 static INT GSUB_apply_LigatureSubst(const OT_LookupTable *look, WORD *glyphs, INT glyph_index, INT write_dir, INT *glyph_count)
1012 {
1013 int j;
1014
1015 TRACE("Ligature Substitution Subtable\n");
1016 for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++)
1017 {
1018 const GSUB_LigatureSubstFormat1 *lsf1;
1019 int offset,index;
1020
1021 lsf1 = (const GSUB_LigatureSubstFormat1*)GSUB_get_subtable(look, j);
1022 offset = GET_BE_WORD(lsf1->Coverage);
1023 index = GSUB_is_glyph_covered((const BYTE*)lsf1+offset, glyphs[glyph_index]);
1024 TRACE(" Coverage index %i\n",index);
1025 if (index != -1)
1026 {
1027 const GSUB_LigatureSet *ls;
1028 int k, count;
1029
1030 offset = GET_BE_WORD(lsf1->LigatureSet[index]);
1031 ls = (const GSUB_LigatureSet*)((const BYTE*)lsf1+offset);
1032 count = GET_BE_WORD(ls->LigatureCount);
1033 TRACE(" LigatureSet has %i members\n",count);
1034 for (k = 0; k < count; k++)
1035 {
1036 const GSUB_Ligature *lig;
1037 int CompCount,l,CompIndex;
1038
1039 offset = GET_BE_WORD(ls->Ligature[k]);
1040 lig = (const GSUB_Ligature*)((const BYTE*)ls+offset);
1041 CompCount = GET_BE_WORD(lig->CompCount) - 1;
1042 CompIndex = glyph_index+write_dir;
1043 for (l = 0; l < CompCount && CompIndex >= 0 && CompIndex < *glyph_count; l++)
1044 {
1045 int CompGlyph;
1046 CompGlyph = GET_BE_WORD(lig->Component[l]);
1047 if (CompGlyph != glyphs[CompIndex])
1048 break;
1049 CompIndex += write_dir;
1050 }
1051 if (l == CompCount)
1052 {
1053 int replaceIdx = glyph_index;
1054 if (write_dir < 0)
1055 replaceIdx = glyph_index - CompCount;
1056
1057 TRACE(" Glyph is 0x%x (+%i) ->",glyphs[glyph_index],CompCount);
1058 glyphs[replaceIdx] = GET_BE_WORD(lig->LigGlyph);
1059 TRACE("0x%x\n",glyphs[replaceIdx]);
1060 if (CompCount > 0)
1061 {
1062 unsigned int j = replaceIdx + 1;
1063 memmove(&glyphs[j], &glyphs[j + CompCount], (*glyph_count - j) * sizeof(*glyphs));
1064 *glyph_count = *glyph_count - CompCount;
1065 }
1066 return replaceIdx + write_dir;
1067 }
1068 }
1069 }
1070 }
1071 return GSUB_E_NOGLYPH;
1072 }
1073
1074 static INT GSUB_apply_ContextSubst(const OT_LookupList* lookup, const OT_LookupTable *look, WORD *glyphs, INT glyph_index, INT write_dir, INT *glyph_count)
1075 {
1076 int j;
1077 TRACE("Context Substitution Subtable\n");
1078 for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++)
1079 {
1080 const GSUB_ContextSubstFormat1 *csf1;
1081
1082 csf1 = (const GSUB_ContextSubstFormat1*)GSUB_get_subtable(look, j);
1083 if (GET_BE_WORD(csf1->SubstFormat) == 1)
1084 {
1085 int offset, index;
1086 TRACE("Context Substitution Subtable: Class 1\n");
1087 offset = GET_BE_WORD(csf1->Coverage);
1088 index = GSUB_is_glyph_covered((const BYTE*)csf1+offset, glyphs[glyph_index]);
1089 TRACE(" Coverage index %i\n",index);
1090 if (index != -1)
1091 {
1092 int k, count;
1093 const GSUB_SubRuleSet *srs;
1094 offset = GET_BE_WORD(csf1->SubRuleSet[index]);
1095 srs = (const GSUB_SubRuleSet*)((const BYTE*)csf1+offset);
1096 count = GET_BE_WORD(srs->SubRuleCount);
1097 TRACE(" SubRuleSet has %i members\n",count);
1098 for (k = 0; k < count; k++)
1099 {
1100 const GSUB_SubRule_1 *sr;
1101 const GSUB_SubRule_2 *sr_2;
1102 unsigned int g;
1103 int g_count, l;
1104 int newIndex = glyph_index;
1105
1106 offset = GET_BE_WORD(srs->SubRule[k]);
1107 sr = (const GSUB_SubRule_1*)((const BYTE*)srs+offset);
1108 g_count = GET_BE_WORD(sr->GlyphCount);
1109 TRACE(" SubRule has %i glyphs\n",g_count);
1110
1111 g = glyph_index + write_dir * (g_count - 1);
1112 if (g >= *glyph_count)
1113 continue;
1114
1115 for (l = 0; l < g_count-1; l++)
1116 if (glyphs[glyph_index + (write_dir * (l+1))] != GET_BE_WORD(sr->Input[l])) break;
1117
1118 if (l < g_count-1)
1119 {
1120 TRACE(" Rule does not match\n");
1121 continue;
1122 }
1123
1124 TRACE(" Rule matches\n");
1125 sr_2 = (const GSUB_SubRule_2 *)&sr->Input[g_count - 1];
1126
1127 for (l = 0; l < GET_BE_WORD(sr->SubstCount); l++)
1128 {
1129 unsigned int lookup_index = GET_BE_WORD(sr_2->SubstLookupRecord[l].LookupListIndex);
1130 unsigned int sequence_index = GET_BE_WORD(sr_2->SubstLookupRecord[l].SequenceIndex);
1131
1132 g = glyph_index + write_dir * sequence_index;
1133 if (g >= *glyph_count)
1134 {
1135 WARN("Invalid sequence index %u (glyph index %u, write dir %d).\n",
1136 sequence_index, glyph_index, write_dir);
1137 continue;
1138 }
1139
1140 TRACE(" SUBST: %u -> %u %u.\n", l, sequence_index, lookup_index);
1141 newIndex = GSUB_apply_lookup(lookup, lookup_index, glyphs, g, write_dir, glyph_count);
1142 if (newIndex == GSUB_E_NOGLYPH)
1143 {
1144 ERR(" Chain failed to generate a glyph\n");
1145 continue;
1146 }
1147 }
1148 return newIndex;
1149 }
1150 }
1151 }
1152 else if (GET_BE_WORD(csf1->SubstFormat) == 2)
1153 {
1154 const GSUB_ContextSubstFormat2 *csf2;
1155 const void *glyph_class_table;
1156 int offset, index;
1157
1158 csf2 = (const GSUB_ContextSubstFormat2*)csf1;
1159 TRACE("Context Substitution Subtable: Class 2\n");
1160 offset = GET_BE_WORD(csf2->Coverage);
1161 index = GSUB_is_glyph_covered((const BYTE*)csf2+offset, glyphs[glyph_index]);
1162 TRACE(" Coverage index %i\n",index);
1163 if (index != -1)
1164 {
1165 int k, count, class;
1166 const GSUB_SubClassSet *scs;
1167
1168 offset = GET_BE_WORD(csf2->ClassDef);
1169 glyph_class_table = (const BYTE *)csf2 + offset;
1170
1171 class = OT_get_glyph_class(glyph_class_table,glyphs[glyph_index]);
1172
1173 offset = GET_BE_WORD(csf2->SubClassSet[class]);
1174 if (offset == 0)
1175 {
1176 TRACE(" No class rule table for class %i\n",class);
1177 continue;
1178 }
1179 scs = (const GSUB_SubClassSet*)((const BYTE*)csf2+offset);
1180 count = GET_BE_WORD(scs->SubClassRuleCnt);
1181 TRACE(" SubClassSet has %i members\n",count);
1182 for (k = 0; k < count; k++)
1183 {
1184 const GSUB_SubClassRule_1 *sr;
1185 const GSUB_SubClassRule_2 *sr_2;
1186 unsigned int g;
1187 int g_count, l;
1188 int newIndex = glyph_index;
1189
1190 offset = GET_BE_WORD(scs->SubClassRule[k]);
1191 sr = (const GSUB_SubClassRule_1*)((const BYTE*)scs+offset);
1192 g_count = GET_BE_WORD(sr->GlyphCount);
1193 TRACE(" SubClassRule has %i glyphs classes\n",g_count);
1194
1195 g = glyph_index + write_dir * (g_count - 1);
1196 if (g >= *glyph_count)
1197 continue;
1198
1199 for (l = 0; l < g_count-1; l++)
1200 {
1201 int g_class = OT_get_glyph_class(glyph_class_table, glyphs[glyph_index + (write_dir * (l+1))]);
1202 if (g_class != GET_BE_WORD(sr->Class[l])) break;
1203 }
1204
1205 if (l < g_count-1)
1206 {
1207 TRACE(" Rule does not match\n");
1208 continue;
1209 }
1210
1211 TRACE(" Rule matches\n");
1212 sr_2 = (const GSUB_SubClassRule_2 *)&sr->Class[g_count - 1];
1213
1214 for (l = 0; l < GET_BE_WORD(sr->SubstCount); l++)
1215 {
1216 unsigned int lookup_index = GET_BE_WORD(sr_2->SubstLookupRecord[l].LookupListIndex);
1217 unsigned int sequence_index = GET_BE_WORD(sr_2->SubstLookupRecord[l].SequenceIndex);
1218
1219 g = glyph_index + write_dir * sequence_index;
1220 if (g >= *glyph_count)
1221 {
1222 WARN("Invalid sequence index %u (glyph index %u, write dir %d).\n",
1223 sequence_index, glyph_index, write_dir);
1224 continue;
1225 }
1226
1227 TRACE(" SUBST: %u -> %u %u.\n", l, sequence_index, lookup_index);
1228 newIndex = GSUB_apply_lookup(lookup, lookup_index, glyphs, g, write_dir, glyph_count);
1229 if (newIndex == GSUB_E_NOGLYPH)
1230 {
1231 ERR(" Chain failed to generate a glyph\n");
1232 continue;
1233 }
1234 }
1235 return newIndex;
1236 }
1237 }
1238 }
1239 else
1240 FIXME("Unhandled Context Substitution Format %i\n", GET_BE_WORD(csf1->SubstFormat));
1241 }
1242 return GSUB_E_NOGLYPH;
1243 }
1244
1245 static INT GSUB_apply_ChainContextSubst(const OT_LookupList* lookup, const OT_LookupTable *look, WORD *glyphs, INT glyph_index, INT write_dir, INT *glyph_count)
1246 {
1247 int j;
1248
1249 TRACE("Chaining Contextual Substitution Subtable\n");
1250 for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++)
1251 {
1252 const GSUB_ChainContextSubstFormat1 *ccsf1;
1253 int offset;
1254 int dirLookahead = write_dir;
1255 int dirBacktrack = -1 * write_dir;
1256
1257 ccsf1 = (const GSUB_ChainContextSubstFormat1*)GSUB_get_subtable(look, j);
1258 if (GET_BE_WORD(ccsf1->SubstFormat) == 1)
1259 {
1260 static int once;
1261 if (!once++)
1262 FIXME(" TODO: subtype 1 (Simple context glyph substitution)\n");
1263 continue;
1264 }
1265 else if (GET_BE_WORD(ccsf1->SubstFormat) == 2)
1266 {
1267 WORD offset, count;
1268 const void *backtrack_class_table;
1269 const void *input_class_table;
1270 const void *lookahead_class_table;
1271 int i;
1272 WORD class;
1273
1274 const GSUB_ChainContextSubstFormat2 *ccsf2 = (const GSUB_ChainContextSubstFormat2*)ccsf1;
1275 const GSUB_ChainSubClassSet *csc;
1276
1277 TRACE(" subtype 2 (Class-based Chaining Context Glyph Substitution)\n");
1278
1279 offset = GET_BE_WORD(ccsf2->Coverage);
1280
1281 if (GSUB_is_glyph_covered((const BYTE*)ccsf2+offset, glyphs[glyph_index]) == -1)
1282 {
1283 TRACE("Glyph not covered\n");
1284 continue;
1285 }
1286 offset = GET_BE_WORD(ccsf2->BacktrackClassDef);
1287 backtrack_class_table = (const BYTE*)ccsf2+offset;
1288 offset = GET_BE_WORD(ccsf2->InputClassDef);
1289 input_class_table = (const BYTE*)ccsf2+offset;
1290 offset = GET_BE_WORD(ccsf2->LookaheadClassDef);
1291 lookahead_class_table = (const BYTE*)ccsf2+offset;
1292 count = GET_BE_WORD(ccsf2->ChainSubClassSetCnt);
1293
1294 class = OT_get_glyph_class(input_class_table, glyphs[glyph_index]);
1295 offset = GET_BE_WORD(ccsf2->ChainSubClassSet[class]);
1296
1297 if (offset == 0)
1298 {
1299 TRACE("No rules for class\n");
1300 continue;
1301 }
1302
1303 csc = (const GSUB_ChainSubClassSet*)((BYTE*)ccsf2+offset);
1304 count = GET_BE_WORD(csc->ChainSubClassRuleCnt);
1305
1306 TRACE("%i rules to check\n",count);
1307
1308 for (i = 0; i < count; i++)
1309 {
1310 WORD backtrack_count, input_count, lookahead_count, substitute_count;
1311 int k;
1312 const GSUB_ChainSubClassRule_1 *backtrack;
1313 const GSUB_ChainSubClassRule_2 *input;
1314 const GSUB_ChainSubClassRule_3 *lookahead;
1315 const GSUB_ChainSubClassRule_4 *substitute;
1316 int new_index = GSUB_E_NOGLYPH;
1317
1318 offset = GET_BE_WORD(csc->ChainSubClassRule[i]);
1319 backtrack = (const GSUB_ChainSubClassRule_1 *)((BYTE *)csc + offset);
1320 backtrack_count = GET_BE_WORD(backtrack->BacktrackGlyphCount);
1321 k = glyph_index + dirBacktrack * backtrack_count;
1322 if (k < 0 || k >= *glyph_count)
1323 continue;
1324
1325 input = (const GSUB_ChainSubClassRule_2 *)&backtrack->Backtrack[backtrack_count];
1326 input_count = GET_BE_WORD(input->InputGlyphCount) - 1;
1327 k = glyph_index + write_dir * input_count;
1328 if (k < 0 || k >= *glyph_count)
1329 continue;
1330
1331 lookahead = (const GSUB_ChainSubClassRule_3 *)&input->Input[input_count];
1332 lookahead_count = GET_BE_WORD(lookahead->LookaheadGlyphCount);
1333 k = glyph_index + dirLookahead * (input_count + lookahead_count);
1334 if (k < 0 || k >= *glyph_count)
1335 continue;
1336
1337 substitute = (const GSUB_ChainSubClassRule_4 *)&lookahead->LookAhead[lookahead_count];
1338
1339 for (k = 0; k < backtrack_count; ++k)
1340 {
1341 WORD target_class = GET_BE_WORD(backtrack->Backtrack[k]);
1342 WORD glyph_class = OT_get_glyph_class(backtrack_class_table, glyphs[glyph_index + (dirBacktrack * (k+1))]);
1343 if (target_class != glyph_class)
1344 break;
1345 }
1346 if (k != backtrack_count)
1347 continue;
1348 TRACE("Matched Backtrack\n");
1349
1350 for (k = 0; k < input_count; ++k)
1351 {
1352 WORD target_class = GET_BE_WORD(input->Input[k]);
1353 WORD glyph_class = OT_get_glyph_class(input_class_table, glyphs[glyph_index + (write_dir * (k+1))]);
1354 if (target_class != glyph_class)
1355 break;
1356 }
1357 if (k != input_count)
1358 continue;
1359 TRACE("Matched IndexGlyphs\n");
1360
1361 for (k = 0; k < lookahead_count; ++k)
1362 {
1363 WORD target_class = GET_BE_WORD(lookahead->LookAhead[k]);
1364 WORD glyph_class = OT_get_glyph_class(lookahead_class_table,
1365 glyphs[glyph_index + (dirLookahead * (input_count + k + 1))]);
1366 if (target_class != glyph_class)
1367 break;
1368 }
1369 if (k != lookahead_count)
1370 continue;
1371 TRACE("Matched LookAhead\n");
1372
1373 substitute_count = GET_BE_WORD(substitute->SubstCount);
1374 for (k = 0; k < substitute_count; ++k)
1375 {
1376 unsigned int lookup_index = GET_BE_WORD(substitute->SubstLookupRecord[k].LookupListIndex);
1377 unsigned int sequence_index = GET_BE_WORD(substitute->SubstLookupRecord[k].SequenceIndex);
1378 unsigned int g = glyph_index + write_dir * sequence_index;
1379
1380 if (g >= *glyph_count)
1381 {
1382 WARN("Skipping invalid sequence index %u (glyph index %u, write dir %d).\n",
1383 sequence_index, glyph_index, write_dir);
1384 continue;
1385 }
1386
1387 TRACE("SUBST: %u -> %u %u.\n", k, sequence_index, lookup_index);
1388 new_index = GSUB_apply_lookup(lookup, lookup_index, glyphs, g, write_dir, glyph_count);
1389 if (new_index == GSUB_E_NOGLYPH)
1390 ERR("Chain failed to generate a glyph.\n");
1391 }
1392 return new_index;
1393 }
1394 }
1395 else if (GET_BE_WORD(ccsf1->SubstFormat) == 3)
1396 {
1397 WORD backtrack_count, input_count, lookahead_count, substitution_count;
1398 int k;
1399 const GSUB_ChainContextSubstFormat3_1 *backtrack;
1400 const GSUB_ChainContextSubstFormat3_2 *input;
1401 const GSUB_ChainContextSubstFormat3_3 *lookahead;
1402 const GSUB_ChainContextSubstFormat3_4 *substitute;
1403 int new_index = GSUB_E_NOGLYPH;
1404
1405 TRACE(" subtype 3 (Coverage-based Chaining Context Glyph Substitution)\n");
1406
1407 backtrack = (const GSUB_ChainContextSubstFormat3_1 *)ccsf1;
1408 backtrack_count = GET_BE_WORD(backtrack->BacktrackGlyphCount);
1409 k = glyph_index + dirBacktrack * backtrack_count;
1410 if (k < 0 || k >= *glyph_count)
1411 continue;
1412
1413 input = (const GSUB_ChainContextSubstFormat3_2 *)&backtrack->Coverage[backtrack_count];
1414 input_count = GET_BE_WORD(input->InputGlyphCount);
1415 k = glyph_index + write_dir * (input_count - 1);
1416 if (k < 0 || k >= *glyph_count)
1417 continue;
1418
1419 lookahead = (const GSUB_ChainContextSubstFormat3_3 *)&input->Coverage[input_count];
1420 lookahead_count = GET_BE_WORD(lookahead->LookaheadGlyphCount);
1421 k = glyph_index + dirLookahead * (input_count + lookahead_count - 1);
1422 if (k < 0 || k >= *glyph_count)
1423 continue;
1424
1425 substitute = (const GSUB_ChainContextSubstFormat3_4 *)&lookahead->Coverage[lookahead_count];
1426
1427 for (k = 0; k < backtrack_count; ++k)
1428 {
1429 offset = GET_BE_WORD(backtrack->Coverage[k]);
1430 if (GSUB_is_glyph_covered((const BYTE *)ccsf1 + offset,
1431 glyphs[glyph_index + (dirBacktrack * (k + 1))]) == -1)
1432 break;
1433 }
1434 if (k != backtrack_count)
1435 continue;
1436 TRACE("Matched Backtrack\n");
1437
1438 for (k = 0; k < input_count; ++k)
1439 {
1440 offset = GET_BE_WORD(input->Coverage[k]);
1441 if (GSUB_is_glyph_covered((const BYTE *)ccsf1 + offset,
1442 glyphs[glyph_index + (write_dir * k)]) == -1)
1443 break;
1444 }
1445 if (k != input_count)
1446 continue;
1447 TRACE("Matched IndexGlyphs\n");
1448
1449 for (k = 0; k < lookahead_count; ++k)
1450 {
1451 offset = GET_BE_WORD(lookahead->Coverage[k]);
1452 if (GSUB_is_glyph_covered((const BYTE *)ccsf1 + offset,
1453 glyphs[glyph_index + (dirLookahead * (input_count + k))]) == -1)
1454 break;
1455 }
1456 if (k != lookahead_count)
1457 continue;
1458 TRACE("Matched LookAhead\n");
1459
1460 substitution_count = GET_BE_WORD(substitute->SubstCount);
1461 for (k = 0; k < substitution_count; ++k)
1462 {
1463 unsigned int lookup_index = GET_BE_WORD(substitute->SubstLookupRecord[k].LookupListIndex);
1464 unsigned int sequence_index = GET_BE_WORD(substitute->SubstLookupRecord[k].SequenceIndex);
1465 unsigned int g = glyph_index + write_dir * sequence_index;
1466
1467 if (g >= *glyph_count)
1468 {
1469 WARN("Skipping invalid sequence index %u (glyph index %u, write dir %d).\n",
1470 sequence_index, glyph_index, write_dir);
1471 continue;
1472 }
1473
1474 TRACE("SUBST: %u -> %u %u.\n", k, sequence_index, lookup_index);
1475 new_index = GSUB_apply_lookup(lookup, lookup_index, glyphs, g, write_dir, glyph_count);
1476 if (new_index == GSUB_E_NOGLYPH)
1477 ERR("Chain failed to generate a glyph.\n");
1478 }
1479 return new_index;
1480 }
1481 }
1482 return GSUB_E_NOGLYPH;
1483 }
1484
1485 static INT GSUB_apply_lookup(const OT_LookupList* lookup, INT lookup_index, WORD *glyphs, INT glyph_index, INT write_dir, INT *glyph_count)
1486 {
1487 int offset;
1488 enum gsub_lookup_type type;
1489 const OT_LookupTable *look;
1490
1491 offset = GET_BE_WORD(lookup->Lookup[lookup_index]);
1492 look = (const OT_LookupTable*)((const BYTE*)lookup + offset);
1493 type = GET_BE_WORD(look->LookupType);
1494 TRACE("type %#x, flag %#x, subtables %u.\n", type,
1495 GET_BE_WORD(look->LookupFlag),GET_BE_WORD(look->SubTableCount));
1496
1497 if (type == GSUB_LOOKUP_EXTENSION)
1498 {
1499 if (GET_BE_WORD(look->SubTableCount))
1500 {
1501 const GSUB_ExtensionPosFormat1 *ext = (const GSUB_ExtensionPosFormat1 *)((const BYTE *)look + GET_BE_WORD(look->SubTable[0]));
1502 if (GET_BE_WORD(ext->SubstFormat) == 1)
1503 {
1504 type = GET_BE_WORD(ext->ExtensionLookupType);
1505 TRACE("extension type %i\n",type);
1506 }
1507 else
1508 {
1509 FIXME("Unhandled Extension Substitution Format %i\n",GET_BE_WORD(ext->SubstFormat));
1510 }
1511 }
1512 else
1513 {
1514 WARN("lookup type is Extension Substitution but no extension subtable exists\n");
1515 }
1516 }
1517 switch(type)
1518 {
1519 case GSUB_LOOKUP_SINGLE:
1520 return GSUB_apply_SingleSubst(look, glyphs, glyph_index, write_dir, glyph_count);
1521 case GSUB_LOOKUP_MULTIPLE:
1522 return GSUB_apply_MultipleSubst(look, glyphs, glyph_index, write_dir, glyph_count);
1523 case GSUB_LOOKUP_ALTERNATE:
1524 return GSUB_apply_AlternateSubst(look, glyphs, glyph_index, write_dir, glyph_count);
1525 case GSUB_LOOKUP_LIGATURE:
1526 return GSUB_apply_LigatureSubst(look, glyphs, glyph_index, write_dir, glyph_count);
1527 case GSUB_LOOKUP_CONTEXT:
1528 return GSUB_apply_ContextSubst(lookup, look, glyphs, glyph_index, write_dir, glyph_count);
1529 case GSUB_LOOKUP_CONTEXT_CHAINED:
1530 return GSUB_apply_ChainContextSubst(lookup, look, glyphs, glyph_index, write_dir, glyph_count);
1531 case GSUB_LOOKUP_EXTENSION:
1532 FIXME("Extension Substitution types not valid here\n");
1533 break;
1534 default:
1535 FIXME("Unhandled GSUB lookup type %#x.\n", type);
1536 }
1537 return GSUB_E_NOGLYPH;
1538 }
1539
1540 int OpenType_apply_GSUB_lookup(const void *table, unsigned int lookup_index, WORD *glyphs,
1541 unsigned int glyph_index, int write_dir, int *glyph_count)
1542 {
1543 const GSUB_Header *header = (const GSUB_Header *)table;
1544 const OT_LookupList *lookup = (const OT_LookupList*)((const BYTE*)header + GET_BE_WORD(header->LookupList));
1545
1546 return GSUB_apply_lookup(lookup, lookup_index, glyphs, glyph_index, write_dir, glyph_count);
1547 }
1548
1549 /**********
1550 * GPOS
1551 **********/
1552 static unsigned int GPOS_apply_lookup(const ScriptCache *script_cache, const OUTLINETEXTMETRICW *otm,
1553 const LOGFONTW *logfont, const SCRIPT_ANALYSIS *analysis, int *advance, const OT_LookupList *lookup,
1554 unsigned int lookup_index, const WORD *glyphs, unsigned int glyph_index, unsigned int glyph_count,
1555 GOFFSET *goffset);
1556
1557 static INT GPOS_get_device_table_value(const OT_DeviceTable *DeviceTable, WORD ppem)
1558 {
1559 static const WORD mask[3] = {3,0xf,0xff};
1560 if (DeviceTable && ppem >= GET_BE_WORD(DeviceTable->StartSize) && ppem <= GET_BE_WORD(DeviceTable->EndSize))
1561 {
1562 WORD format = GET_BE_WORD(DeviceTable->DeltaFormat);
1563 int index = ppem - GET_BE_WORD(DeviceTable->StartSize);
1564 int value;
1565
1566 TRACE("device table, format %#x, index %i\n", format, index);
1567
1568 if (format < 1 || format > 3)
1569 {
1570 WARN("invalid delta format %#x\n", format);
1571 return 0;
1572 }
1573
1574 index = index << format;
1575 value = (DeviceTable->DeltaValue[index/sizeof(WORD)] << (index%sizeof(WORD)))&mask[format-1];
1576 TRACE("offset %i, value %i\n",index, value);
1577 if (value > mask[format-1]/2)
1578 value = -1 * ((mask[format-1]+1) - value);
1579 return value;
1580 }
1581 return 0;
1582 }
1583
1584 static void GPOS_get_anchor_values(const void *table, POINT *pt, WORD ppem)
1585 {
1586 const GPOS_AnchorFormat1* anchor1 = (const GPOS_AnchorFormat1*)table;
1587
1588 switch (GET_BE_WORD(anchor1->AnchorFormat))
1589 {
1590 case 1:
1591 {
1592 TRACE("Anchor Format 1\n");
1593 pt->x = (short)GET_BE_WORD(anchor1->XCoordinate);
1594 pt->y = (short)GET_BE_WORD(anchor1->YCoordinate);
1595 break;
1596 }
1597 case 2:
1598 {
1599 const GPOS_AnchorFormat2* anchor2 = (const GPOS_AnchorFormat2*)table;
1600 TRACE("Anchor Format 2\n");
1601 pt->x = (short)GET_BE_WORD(anchor2->XCoordinate);
1602 pt->y = (short)GET_BE_WORD(anchor2->YCoordinate);
1603 break;
1604 }
1605 case 3:
1606 {
1607 int offset;
1608 const GPOS_AnchorFormat3* anchor3 = (const GPOS_AnchorFormat3*)table;
1609 TRACE("Anchor Format 3\n");
1610 pt->x = (short)GET_BE_WORD(anchor3->XCoordinate);
1611 pt->y = (short)GET_BE_WORD(anchor3->YCoordinate);
1612 offset = GET_BE_WORD(anchor3->XDeviceTable);
1613 TRACE("ppem %i\n",ppem);
1614 if (offset)
1615 {
1616 const OT_DeviceTable* DeviceTableX = NULL;
1617 DeviceTableX = (const OT_DeviceTable*)((const BYTE*)anchor3 + offset);
1618 pt->x += GPOS_get_device_table_value(DeviceTableX, ppem);
1619 }
1620 offset = GET_BE_WORD(anchor3->YDeviceTable);
1621 if (offset)
1622 {
1623 const OT_DeviceTable* DeviceTableY = NULL;
1624 DeviceTableY = (const OT_DeviceTable*)((const BYTE*)anchor3 + offset);
1625 pt->y += GPOS_get_device_table_value(DeviceTableY, ppem);
1626 }
1627 break;
1628 }
1629 default:
1630 ERR("Unknown Anchor Format %i\n",GET_BE_WORD(anchor1->AnchorFormat));
1631 pt->x = 0;
1632 pt->y = 0;
1633 }
1634 }
1635
1636 static void GPOS_convert_design_units_to_device(const OUTLINETEXTMETRICW *otm, const LOGFONTW *logfont,
1637 int desX, int desY, double *devX, double *devY)
1638 {
1639 int emHeight = otm->otmTextMetrics.tmAscent + otm->otmTextMetrics.tmDescent - otm->otmTextMetrics.tmInternalLeading;
1640
1641 TRACE("emHeight %i lfWidth %i\n",emHeight, logfont->lfWidth);
1642 *devX = (desX * emHeight) / (double)otm->otmEMSquare;
1643 *devY = (desY * emHeight) / (double)otm->otmEMSquare;
1644 if (logfont->lfWidth)
1645 FIXME("Font with lfWidth set not handled properly.\n");
1646 }
1647
1648 static INT GPOS_get_value_record(WORD ValueFormat, const WORD data[], GPOS_ValueRecord *record)
1649 {
1650 INT offset = 0;
1651 if (ValueFormat & 0x0001) { if (data) record->XPlacement = GET_BE_WORD(data[offset]); offset++; }
1652 if (ValueFormat & 0x0002) { if (data) record->YPlacement = GET_BE_WORD(data[offset]); offset++; }
1653 if (ValueFormat & 0x0004) { if (data) record->XAdvance = GET_BE_WORD(data[offset]); offset++; }
1654 if (ValueFormat & 0x0008) { if (data) record->YAdvance = GET_BE_WORD(data[offset]); offset++; }
1655 if (ValueFormat & 0x0010) { if (data) record->XPlaDevice = GET_BE_WORD(data[offset]); offset++; }
1656 if (ValueFormat & 0x0020) { if (data) record->YPlaDevice = GET_BE_WORD(data[offset]); offset++; }
1657 if (ValueFormat & 0x0040) { if (data) record->XAdvDevice = GET_BE_WORD(data[offset]); offset++; }
1658 if (ValueFormat & 0x0080) { if (data) record->YAdvDevice = GET_BE_WORD(data[offset]); offset++; }
1659 return offset;
1660 }
1661
1662 static void GPOS_get_value_record_offsets(const BYTE *head, GPOS_ValueRecord *ValueRecord,
1663 WORD ValueFormat, unsigned int ppem, POINT *ptPlacement, POINT *ptAdvance)
1664 {
1665 if (ValueFormat & 0x0001) ptPlacement->x += (short)ValueRecord->XPlacement;
1666 if (ValueFormat & 0x0002) ptPlacement->y += (short)ValueRecord->YPlacement;
1667 if (ValueFormat & 0x0004) ptAdvance->x += (short)ValueRecord->XAdvance;
1668 if (ValueFormat & 0x0008) ptAdvance->y += (short)ValueRecord->YAdvance;
1669 if (ValueFormat & 0x0010) ptPlacement->x += GPOS_get_device_table_value((const OT_DeviceTable*)(head + ValueRecord->XPlaDevice), ppem);
1670 if (ValueFormat & 0x0020) ptPlacement->y += GPOS_get_device_table_value((const OT_DeviceTable*)(head + ValueRecord->YPlaDevice), ppem);
1671 if (ValueFormat & 0x0040) ptAdvance->x += GPOS_get_device_table_value((const OT_DeviceTable*)(head + ValueRecord->XAdvDevice), ppem);
1672 if (ValueFormat & 0x0080) ptAdvance->y += GPOS_get_device_table_value((const OT_DeviceTable*)(head + ValueRecord->YAdvDevice), ppem);
1673 if (ValueFormat & 0xFF00) FIXME("Unhandled Value Format %x\n",ValueFormat&0xFF00);
1674 }
1675
1676 static const BYTE *GPOS_get_subtable(const OT_LookupTable *look, int index)
1677 {
1678 int offset = GET_BE_WORD(look->SubTable[index]);
1679
1680 if (GET_BE_WORD(look->LookupType) == GPOS_LOOKUP_POSITION_EXTENSION)
1681 {
1682 const GPOS_ExtensionPosFormat1 *ext = (const GPOS_ExtensionPosFormat1 *)((const BYTE *)look + offset);
1683 if (GET_BE_WORD(ext->PosFormat) == 1)
1684 {
1685 offset += GET_BE_DWORD(ext->ExtensionOffset);
1686 }
1687 else
1688 {
1689 FIXME("Unhandled Extension Positioning Format %i\n",GET_BE_WORD(ext->PosFormat));
1690 }
1691 }
1692 return (const BYTE *)look + offset;
1693 }
1694
1695 static void GPOS_apply_SingleAdjustment(const OT_LookupTable *look, const SCRIPT_ANALYSIS *analysis,
1696 const WORD *glyphs, unsigned int glyph_index, unsigned int glyph_count, unsigned int ppem,
1697 POINT *adjust, POINT *advance)
1698 {
1699 int j;
1700
1701 TRACE("Single Adjustment Positioning Subtable\n");
1702
1703 for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++)
1704 {
1705 const GPOS_SinglePosFormat1 *spf1 = (const GPOS_SinglePosFormat1*)GPOS_get_subtable(look, j);
1706 WORD offset;
1707 if (GET_BE_WORD(spf1->PosFormat) == 1)
1708 {
1709 offset = GET_BE_WORD(spf1->Coverage);
1710 if (GSUB_is_glyph_covered((const BYTE*)spf1+offset, glyphs[glyph_index]) != -1)
1711 {
1712 GPOS_ValueRecord ValueRecord = {0,0,0,0,0,0,0,0};
1713 WORD ValueFormat = GET_BE_WORD(spf1->ValueFormat);
1714 GPOS_get_value_record(ValueFormat, spf1->Value, &ValueRecord);
1715 GPOS_get_value_record_offsets((const BYTE *)spf1, &ValueRecord, ValueFormat, ppem, adjust, advance);
1716 TRACE("Glyph Adjusted by %i,%i\n",ValueRecord.XPlacement,ValueRecord.YPlacement);
1717 }
1718 }
1719 else if (GET_BE_WORD(spf1->PosFormat) == 2)
1720 {
1721 int index;
1722 const GPOS_SinglePosFormat2 *spf2;
1723 spf2 = (const GPOS_SinglePosFormat2*)spf1;
1724 offset = GET_BE_WORD(spf2->Coverage);
1725 index = GSUB_is_glyph_covered((const BYTE*)spf2+offset, glyphs[glyph_index]);
1726 if (index != -1)
1727 {
1728 int size;
1729 GPOS_ValueRecord ValueRecord = {0,0,0,0,0,0,0,0};
1730 WORD ValueFormat = GET_BE_WORD(spf2->ValueFormat);
1731 size = GPOS_get_value_record(ValueFormat, spf2->Value, &ValueRecord);
1732 if (index > 0)
1733 {
1734 offset = size * index;
1735 GPOS_get_value_record(ValueFormat, &spf2->Value[offset], &ValueRecord);
1736 }
1737 GPOS_get_value_record_offsets((const BYTE *)spf2, &ValueRecord, ValueFormat, ppem, adjust, advance);
1738 TRACE("Glyph Adjusted by %i,%i\n",ValueRecord.XPlacement,ValueRecord.YPlacement);
1739 }
1740 }
1741 else
1742 FIXME("Single Adjustment Positioning: Format %i Unhandled\n",GET_BE_WORD(spf1->PosFormat));
1743 }
1744 }
1745
1746 static void apply_pair_value( const void *pos_table, WORD val_fmt1, WORD val_fmt2, const WORD *pair,
1747 INT ppem, POINT *adjust, POINT *advance )
1748 {
1749 GPOS_ValueRecord val_rec1 = {0,0,0,0,0,0,0,0};
1750 GPOS_ValueRecord val_rec2 = {0,0,0,0,0,0,0,0};
1751 INT size;
1752
1753 size = GPOS_get_value_record( val_fmt1, pair, &val_rec1 );
1754 GPOS_get_value_record( val_fmt2, pair + size, &val_rec2 );
1755
1756 if (val_fmt1)
1757 {
1758 GPOS_get_value_record_offsets( pos_table, &val_rec1, val_fmt1, ppem, adjust, advance );
1759 TRACE( "Glyph 1 resulting cumulative offset is %s design units\n", wine_dbgstr_point(&adjust[0]) );
1760 TRACE( "Glyph 1 resulting cumulative advance is %s design units\n", wine_dbgstr_point(&advance[0]) );
1761 }
1762 if (val_fmt2)
1763 {
1764 GPOS_get_value_record_offsets( pos_table, &val_rec2, val_fmt2, ppem, adjust + 1, advance + 1 );
1765 TRACE( "Glyph 2 resulting cumulative offset is %s design units\n", wine_dbgstr_point(&adjust[1]) );
1766 TRACE( "Glyph 2 resulting cumulative advance is %s design units\n", wine_dbgstr_point(&advance[1]) );
1767 }
1768 }
1769
1770 static int GPOS_apply_PairAdjustment(const OT_LookupTable *look, const SCRIPT_ANALYSIS *analysis,
1771 const WORD *glyphs, unsigned int glyph_index, unsigned int glyph_count, unsigned int ppem,
1772 POINT *adjust, POINT *advance)
1773 {
1774 int j;
1775 int write_dir = (analysis->fRTL && !analysis->fLogicalOrder) ? -1 : 1;
1776
1777 if (glyph_index + write_dir >= glyph_count)
1778 return 1;
1779
1780 TRACE("Pair Adjustment Positioning Subtable\n");
1781
1782 for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++)
1783 {
1784 const GPOS_PairPosFormat1 *ppf1 = (const GPOS_PairPosFormat1*)GPOS_get_subtable(look, j);
1785 WORD offset;
1786 if (GET_BE_WORD(ppf1->PosFormat) == 1)
1787 {
1788 int index;
1789 WORD ValueFormat1 = GET_BE_WORD(ppf1->ValueFormat1);
1790 WORD ValueFormat2 = GET_BE_WORD(ppf1->ValueFormat2);
1791 INT val_fmt1_size = GPOS_get_value_record( ValueFormat1, NULL, NULL );
1792 INT val_fmt2_size = GPOS_get_value_record( ValueFormat2, NULL, NULL );
1793 offset = GET_BE_WORD(ppf1->Coverage);
1794 index = GSUB_is_glyph_covered((const BYTE*)ppf1+offset, glyphs[glyph_index]);
1795 if (index != -1 && index < GET_BE_WORD(ppf1->PairSetCount))
1796 {
1797 int k;
1798 int pair_count;
1799 const GPOS_PairSet *ps;
1800 const GPOS_PairValueRecord *pair_val_rec;
1801 offset = GET_BE_WORD(ppf1->PairSetOffset[index]);
1802 ps = (const GPOS_PairSet*)((const BYTE*)ppf1+offset);
1803 pair_count = GET_BE_WORD(ps->PairValueCount);
1804 pair_val_rec = ps->PairValueRecord;
1805 for (k = 0; k < pair_count; k++)
1806 {
1807 WORD second_glyph = GET_BE_WORD(pair_val_rec->SecondGlyph);
1808 if (glyphs[glyph_index+write_dir] == second_glyph)
1809 {
1810 int next = 1;
1811 TRACE("Format 1: Found Pair %x,%x\n",glyphs[glyph_index],glyphs[glyph_index+write_dir]);
1812 apply_pair_value(ppf1, ValueFormat1, ValueFormat2,
1813 pair_val_rec->Value1, ppem, adjust, advance);
1814 if (ValueFormat2) next++;
1815 return next;
1816 }
1817 pair_val_rec = (const GPOS_PairValueRecord *)(pair_val_rec->Value1 + val_fmt1_size + val_fmt2_size);
1818 }
1819 }
1820 }
1821 else if (GET_BE_WORD(ppf1->PosFormat) == 2)
1822 {
1823 const GPOS_PairPosFormat2 *ppf2 = (const GPOS_PairPosFormat2*)ppf1;
1824 int index;
1825 WORD ValueFormat1 = GET_BE_WORD( ppf2->ValueFormat1 );
1826 WORD ValueFormat2 = GET_BE_WORD( ppf2->ValueFormat2 );
1827 INT val_fmt1_size = GPOS_get_value_record( ValueFormat1, NULL, NULL );
1828 INT val_fmt2_size = GPOS_get_value_record( ValueFormat2, NULL, NULL );
1829 WORD class1_count = GET_BE_WORD( ppf2->Class1Count );
1830 WORD class2_count = GET_BE_WORD( ppf2->Class2Count );
1831
1832 offset = GET_BE_WORD( ppf2->Coverage );
1833 index = GSUB_is_glyph_covered( (const BYTE*)ppf2 + offset, glyphs[glyph_index] );
1834 if (index != -1)
1835 {
1836 WORD class1, class2;
1837 class1 = OT_get_glyph_class( (const BYTE *)ppf2 + GET_BE_WORD(ppf2->ClassDef1), glyphs[glyph_index] );
1838 class2 = OT_get_glyph_class( (const BYTE *)ppf2 + GET_BE_WORD(ppf2->ClassDef2), glyphs[glyph_index + write_dir] );
1839 if (class1 < class1_count && class2 < class2_count)
1840 {
1841 const WORD *pair_val = ppf2->Class1Record + (class1 * class2_count + class2) * (val_fmt1_size + val_fmt2_size);
1842 int next = 1;
1843
1844 TRACE( "Format 2: Found Pair %x,%x\n", glyphs[glyph_index], glyphs[glyph_index + write_dir] );
1845
1846 apply_pair_value(ppf2, ValueFormat1, ValueFormat2, pair_val, ppem, adjust, advance);
1847 if (ValueFormat2) next++;
1848 return next;
1849 }
1850 }
1851 }
1852 else
1853 FIXME("Pair Adjustment Positioning: Format %i Unhandled\n",GET_BE_WORD(ppf1->PosFormat));
1854 }
1855 return 1;
1856 }
1857
1858 static void GPOS_apply_CursiveAttachment(const OT_LookupTable *look, const SCRIPT_ANALYSIS *analysis,
1859 const WORD *glyphs, unsigned int glyph_index, unsigned int glyph_count, unsigned int ppem, POINT *pt)
1860 {
1861 int j;
1862 int write_dir = (analysis->fRTL && !analysis->fLogicalOrder) ? -1 : 1;
1863
1864 if (glyph_index + write_dir >= glyph_count)
1865 return;
1866
1867 TRACE("Cursive Attachment Positioning Subtable\n");
1868
1869 for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++)
1870 {
1871 const GPOS_CursivePosFormat1 *cpf1 = (const GPOS_CursivePosFormat1 *)GPOS_get_subtable(look, j);
1872 if (GET_BE_WORD(cpf1->PosFormat) == 1)
1873 {
1874 int index_exit, index_entry;
1875 WORD offset = GET_BE_WORD( cpf1->Coverage );
1876 index_exit = GSUB_is_glyph_covered((const BYTE*)cpf1+offset, glyphs[glyph_index]);
1877 if (index_exit != -1 && cpf1->EntryExitRecord[index_exit].ExitAnchor!= 0)
1878 {
1879 index_entry = GSUB_is_glyph_covered((const BYTE*)cpf1+offset, glyphs[glyph_index+write_dir]);
1880 if (index_entry != -1 && cpf1->EntryExitRecord[index_entry].EntryAnchor != 0)
1881 {
1882 POINT exit_pt, entry_pt;
1883 offset = GET_BE_WORD(cpf1->EntryExitRecord[index_exit].ExitAnchor);
1884 GPOS_get_anchor_values((const BYTE*)cpf1 + offset, &exit_pt, ppem);
1885 offset = GET_BE_WORD(cpf1->EntryExitRecord[index_entry].EntryAnchor);
1886 GPOS_get_anchor_values((const BYTE*)cpf1 + offset, &entry_pt, ppem);
1887 TRACE("Found linkage %x[%s] %x[%s]\n",glyphs[glyph_index], wine_dbgstr_point(&exit_pt), glyphs[glyph_index+write_dir], wine_dbgstr_point(&entry_pt));
1888 pt->x = entry_pt.x - exit_pt.x;
1889 pt->y = entry_pt.y - exit_pt.y;
1890 return;
1891 }
1892 }
1893 }
1894 else
1895 FIXME("Cursive Attachment Positioning: Format %i Unhandled\n",GET_BE_WORD(cpf1->PosFormat));
1896 }
1897 return;
1898 }
1899
1900 static int GPOS_apply_MarkToBase(const ScriptCache *script_cache, const OT_LookupTable *look,
1901 const SCRIPT_ANALYSIS *analysis, const WORD *glyphs, unsigned int glyph_index,
1902 unsigned int glyph_count, unsigned int ppem, POINT *pt)
1903 {
1904 int j;
1905 int write_dir = (analysis->fRTL && !analysis->fLogicalOrder) ? -1 : 1;
1906 const void *glyph_class_table = NULL;
1907 int rc = -1;
1908
1909 if (script_cache->GDEF_Table)
1910 {
1911 const GDEF_Header *header = script_cache->GDEF_Table;
1912 WORD offset = GET_BE_WORD( header->GlyphClassDef );
1913 if (offset)
1914 glyph_class_table = (const BYTE *)script_cache->GDEF_Table + offset;
1915 }
1916
1917 TRACE("MarkToBase Attachment Positioning Subtable\n");
1918
1919 for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++)
1920 {
1921 const GPOS_MarkBasePosFormat1 *mbpf1 = (const GPOS_MarkBasePosFormat1 *)GPOS_get_subtable(look, j);
1922 if (GET_BE_WORD(mbpf1->PosFormat) == 1)
1923 {
1924 int offset = GET_BE_WORD(mbpf1->MarkCoverage);
1925 int mark_index;
1926 mark_index = GSUB_is_glyph_covered((const BYTE*)mbpf1+offset, glyphs[glyph_index]);
1927 if (mark_index != -1)
1928 {
1929 int base_index;
1930 int base_glyph = glyph_index - write_dir;
1931
1932 if (glyph_class_table)
1933 {
1934 while (OT_get_glyph_class(glyph_class_table, glyphs[base_glyph]) == MarkGlyph && base_glyph > 0 && base_glyph < glyph_count)
1935 base_glyph -= write_dir;
1936 }
1937
1938 offset = GET_BE_WORD(mbpf1->BaseCoverage);
1939 base_index = GSUB_is_glyph_covered((const BYTE*)mbpf1+offset, glyphs[base_glyph]);
1940 if (base_index != -1)
1941 {
1942 const GPOS_MarkArray *ma;
1943 const GPOS_MarkRecord *mr;
1944 const GPOS_BaseArray *ba;
1945 const GPOS_BaseRecord *br;
1946 int mark_class;
1947 int class_count = GET_BE_WORD(mbpf1->ClassCount);
1948 int baserecord_size;
1949 POINT base_pt;
1950 POINT mark_pt;
1951 TRACE("Mark %x(%i) and base %x(%i)\n",glyphs[glyph_index], mark_index, glyphs[base_glyph], base_index);
1952 offset = GET_BE_WORD(mbpf1->MarkArray);
1953 ma = (const GPOS_MarkArray*)((const BYTE*)mbpf1 + offset);
1954 if (mark_index > GET_BE_WORD(ma->MarkCount))
1955 {
1956 ERR("Mark index exceeded mark count\n");
1957 return -1;
1958 }
1959 mr = &ma->MarkRecord[mark_index];
1960 mark_class = GET_BE_WORD(mr->Class);
1961 TRACE("Mark Class %i total classes %i\n",mark_class,class_count);
1962 offset = GET_BE_WORD(mbpf1->BaseArray);
1963 ba = (const GPOS_BaseArray*)((const BYTE*)mbpf1 + offset);
1964 baserecord_size = class_count * sizeof(WORD);
1965 br = (const GPOS_BaseRecord*)((const BYTE*)ba + sizeof(WORD) + (baserecord_size * base_index));
1966 offset = GET_BE_WORD(br->BaseAnchor[mark_class]);
1967 GPOS_get_anchor_values((const BYTE*)ba + offset, &base_pt, ppem);
1968 offset = GET_BE_WORD(mr->MarkAnchor);
1969 GPOS_get_anchor_values((const BYTE*)ma + offset, &mark_pt, ppem);
1970 TRACE("Offset on base is %s design units\n",wine_dbgstr_point(&base_pt));
1971 TRACE("Offset on mark is %s design units\n",wine_dbgstr_point(&mark_pt));
1972 pt->x += base_pt.x - mark_pt.x;
1973 pt->y += base_pt.y - mark_pt.y;
1974 TRACE("Resulting cumulative offset is %s design units\n",wine_dbgstr_point(pt));
1975 rc = base_glyph;
1976 }
1977 }
1978 }
1979 else
1980 FIXME("Unhandled Mark To Base Format %i\n",GET_BE_WORD(mbpf1->PosFormat));
1981 }
1982 return rc;
1983 }
1984
1985 static void GPOS_apply_MarkToLigature(const OT_LookupTable *look, const SCRIPT_ANALYSIS *analysis,
1986 const WORD *glyphs, unsigned int glyph_index, unsigned int glyph_count, unsigned int ppem, POINT *pt)
1987 {
1988 int j;
1989 int write_dir = (analysis->fRTL && !analysis->fLogicalOrder) ? -1 : 1;
1990
1991 TRACE("MarkToLigature Attachment Positioning Subtable\n");
1992
1993 for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++)
1994 {
1995 const GPOS_MarkLigPosFormat1 *mlpf1 = (const GPOS_MarkLigPosFormat1 *)GPOS_get_subtable(look, j);
1996 if (GET_BE_WORD(mlpf1->PosFormat) == 1)
1997 {
1998 int offset = GET_BE_WORD(mlpf1->MarkCoverage);
1999 int mark_index;
2000 mark_index = GSUB_is_glyph_covered((const BYTE*)mlpf1+offset, glyphs[glyph_index]);
2001 if (mark_index != -1)
2002 {
2003 int ligature_index;
2004 offset = GET_BE_WORD(mlpf1->LigatureCoverage);
2005 ligature_index = GSUB_is_glyph_covered((const BYTE*)mlpf1+offset, glyphs[glyph_index - write_dir]);
2006 if (ligature_index != -1)
2007 {
2008 const GPOS_MarkArray *ma;
2009 const GPOS_MarkRecord *mr;
2010
2011 const GPOS_LigatureArray *la;
2012 const GPOS_LigatureAttach *lt;
2013 int mark_class;
2014 int class_count = GET_BE_WORD(mlpf1->ClassCount);
2015 int component_count;
2016 int component_size;
2017 int i;
2018 POINT ligature_pt;
2019 POINT mark_pt;
2020
2021 TRACE("Mark %x(%i) and ligature %x(%i)\n",glyphs[glyph_index], mark_index, glyphs[glyph_index - write_dir], ligature_index);
2022 offset = GET_BE_WORD(mlpf1->MarkArray);
2023 ma = (const GPOS_MarkArray*)((const BYTE*)mlpf1 + offset);
2024 if (mark_index > GET_BE_WORD(ma->MarkCount))
2025 {
2026 ERR("Mark index exceeded mark count\n");
2027 return;
2028 }
2029 mr = &ma->MarkRecord[mark_index];
2030 mark_class = GET_BE_WORD(mr->Class);
2031 TRACE("Mark Class %i total classes %i\n",mark_class,class_count);
2032 offset = GET_BE_WORD(mlpf1->LigatureArray);
2033 la = (const GPOS_LigatureArray*)((const BYTE*)mlpf1 + offset);
2034 if (ligature_index > GET_BE_WORD(la->LigatureCount))
2035 {
2036 ERR("Ligature index exceeded ligature count\n");
2037 return;
2038 }
2039 offset = GET_BE_WORD(la->LigatureAttach[ligature_index]);
2040 lt = (const GPOS_LigatureAttach*)((const BYTE*)la + offset);
2041
2042 component_count = GET_BE_WORD(lt->ComponentCount);
2043 component_size = class_count * sizeof(WORD);
2044 offset = 0;
2045 for (i = 0; i < component_count && !offset; i++)
2046 {
2047 int k;
2048 const GPOS_ComponentRecord *cr = (const GPOS_ComponentRecord*)((const BYTE*)lt->ComponentRecord + (component_size * i));
2049 for (k = 0; k < class_count && !offset; k++)
2050 offset = GET_BE_WORD(cr->LigatureAnchor[k]);
2051 cr = (const GPOS_ComponentRecord*)((const BYTE*)cr + component_size);
2052 }
2053 if (!offset)
2054 {
2055 ERR("Failed to find available ligature connection point\n");
2056 return;
2057 }
2058
2059 GPOS_get_anchor_values((const BYTE*)lt + offset, &ligature_pt, ppem);
2060 offset = GET_BE_WORD(mr->MarkAnchor);
2061 GPOS_get_anchor_values((const BYTE*)ma + offset, &mark_pt, ppem);
2062 TRACE("Offset on ligature is %s design units\n",wine_dbgstr_point(&ligature_pt));
2063 TRACE("Offset on mark is %s design units\n",wine_dbgstr_point(&mark_pt));
2064 pt->x += ligature_pt.x - mark_pt.x;
2065 pt->y += ligature_pt.y - mark_pt.y;
2066 TRACE("Resulting cumulative offset is %s design units\n",wine_dbgstr_point(pt));
2067 }
2068 }
2069 }
2070 else
2071 FIXME("Unhandled Mark To Ligature Format %i\n",GET_BE_WORD(mlpf1->PosFormat));
2072 }
2073 }
2074
2075 static BOOL GPOS_apply_MarkToMark(const OT_LookupTable *look, const SCRIPT_ANALYSIS *analysis,
2076 const WORD *glyphs, unsigned int glyph_index, unsigned int glyph_count, unsigned int ppem, POINT *pt)
2077 {
2078 int j;
2079 BOOL rc = FALSE;
2080 int write_dir = (analysis->fRTL && !analysis->fLogicalOrder) ? -1 : 1;
2081
2082 TRACE("MarkToMark Attachment Positioning Subtable\n");
2083
2084 for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++)
2085 {
2086 const GPOS_MarkMarkPosFormat1 *mmpf1 = (const GPOS_MarkMarkPosFormat1 *)GPOS_get_subtable(look, j);
2087 if (GET_BE_WORD(mmpf1->PosFormat) == 1)
2088 {
2089 int offset = GET_BE_WORD(mmpf1->Mark1Coverage);
2090 int mark_index;
2091 mark_index = GSUB_is_glyph_covered((const BYTE*)mmpf1+offset, glyphs[glyph_index]);
2092 if (mark_index != -1)
2093 {
2094 int mark2_index;
2095 offset = GET_BE_WORD(mmpf1->Mark2Coverage);
2096 mark2_index = GSUB_is_glyph_covered((const BYTE*)mmpf1+offset, glyphs[glyph_index - write_dir]);
2097 if (mark2_index != -1)
2098 {
2099 const GPOS_MarkArray *ma;
2100 const GPOS_MarkRecord *mr;
2101 const GPOS_Mark2Array *m2a;
2102 const GPOS_Mark2Record *m2r;
2103 int mark_class;
2104 int class_count = GET_BE_WORD(mmpf1->ClassCount);
2105 int mark2record_size;
2106 POINT mark2_pt;
2107 POINT mark_pt;
2108 TRACE("Mark %x(%i) and Mark2 %x(%i)\n",glyphs[glyph_index], mark_index, glyphs[glyph_index - write_dir], mark2_index);
2109 offset = GET_BE_WORD(mmpf1->Mark1Array);
2110 ma = (const GPOS_MarkArray*)((const BYTE*)mmpf1 + offset);
2111 if (mark_index > GET_BE_WORD(ma->MarkCount))
2112 {
2113 ERR("Mark index exceeded mark count\n");
2114 return FALSE;
2115 }
2116 mr = &ma->MarkRecord[mark_index];
2117 mark_class = GET_BE_WORD(mr->Class);
2118 TRACE("Mark Class %i total classes %i\n",mark_class,class_count);
2119 offset = GET_BE_WORD(mmpf1->Mark2Array);
2120 m2a = (const GPOS_Mark2Array*)((const BYTE*)mmpf1 + offset);
2121 mark2record_size = class_count * sizeof(WORD);
2122 m2r = (const GPOS_Mark2Record*)((const BYTE*)m2a + sizeof(WORD) + (mark2record_size * mark2_index));
2123 offset = GET_BE_WORD(m2r->Mark2Anchor[mark_class]);
2124 GPOS_get_anchor_values((const BYTE*)m2a + offset, &mark2_pt, ppem);
2125 offset = GET_BE_WORD(mr->MarkAnchor);
2126 GPOS_get_anchor_values((const BYTE*)ma + offset, &mark_pt, ppem);
2127 TRACE("Offset on mark2 is %s design units\n",wine_dbgstr_point(&mark2_pt));
2128 TRACE("Offset on mark is %s design units\n",wine_dbgstr_point(&mark_pt));
2129 pt->x += mark2_pt.x - mark_pt.x;
2130 pt->y += mark2_pt.y - mark_pt.y;
2131 TRACE("Resulting cumulative offset is %s design units\n",wine_dbgstr_point(pt));
2132 rc = TRUE;
2133 }
2134 }
2135 }
2136 else
2137 FIXME("Unhandled Mark To Mark Format %i\n",GET_BE_WORD(mmpf1->PosFormat));
2138 }
2139 return rc;
2140 }
2141
2142 static unsigned int GPOS_apply_ContextPos(const ScriptCache *script_cache, const OUTLINETEXTMETRICW *otm,
2143 const LOGFONTW *logfont, const SCRIPT_ANALYSIS *analysis, int *advance, const OT_LookupList *lookup,
2144 const OT_LookupTable *look, const WORD *glyphs, unsigned int glyph_index, unsigned int glyph_count,
2145 GOFFSET *goffset)
2146 {
2147 int j;
2148 int write_dir = (analysis->fRTL && !analysis->fLogicalOrder) ? -1 : 1;
2149
2150 TRACE("Contextual Positioning Subtable\n");
2151
2152 for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++)
2153 {
2154 const GPOS_ContextPosFormat2 *cpf2 = (GPOS_ContextPosFormat2*)GPOS_get_subtable(look, j);
2155
2156 if (GET_BE_WORD(cpf2->PosFormat) == 1)
2157 {
2158 static int once;
2159 if (!once++)
2160 FIXME(" TODO: subtype 1\n");
2161 continue;
2162 }
2163 else if (GET_BE_WORD(cpf2->PosFormat) == 2)
2164 {
2165 WORD offset = GET_BE_WORD(cpf2->Coverage);
2166 int index;
2167
2168 TRACE("Contextual Positioning Subtable: Format 2\n");
2169
2170 index = GSUB_is_glyph_covered((const BYTE*)cpf2+offset, glyphs[glyph_index]);
2171 TRACE("Coverage index %i\n",index);
2172 if (index != -1)
2173 {
2174 int k, count, class;
2175 const GPOS_PosClassSet *pcs;
2176 const void *glyph_class_table = NULL;
2177
2178 offset = GET_BE_WORD(cpf2->ClassDef);
2179 glyph_class_table = (const BYTE *)cpf2 + offset;
2180
2181 class = OT_get_glyph_class(glyph_class_table,glyphs[glyph_index]);
2182
2183 offset = GET_BE_WORD(cpf2->PosClassSet[class]);
2184 if (offset == 0)
2185 {
2186 TRACE("No class rule table for class %i\n",class);
2187 continue;
2188 }
2189 pcs = (const GPOS_PosClassSet*)((const BYTE*)cpf2+offset);
2190 count = GET_BE_WORD(pcs->PosClassRuleCnt);
2191 TRACE("PosClassSet has %i members\n",count);
2192 for (k = 0; k < count; k++)
2193 {
2194 const GPOS_PosClassRule_1 *pr;
2195 const GPOS_PosClassRule_2 *pr_2;
2196 unsigned int g;
2197 int g_count, l;
2198
2199 offset = GET_BE_WORD(pcs->PosClassRule[k]);
2200 pr = (const GPOS_PosClassRule_1*)((const BYTE*)pcs+offset);
2201 g_count = GET_BE_WORD(pr->GlyphCount);
2202 TRACE("PosClassRule has %i glyphs classes\n",g_count);
2203
2204 g = glyph_index + write_dir * (g_count - 1);
2205 if (g >= glyph_count)
2206 continue;
2207
2208 for (l = 0; l < g_count-1; l++)
2209 {
2210 int g_class = OT_get_glyph_class(glyph_class_table, glyphs[glyph_index + (write_dir * (l+1))]);
2211 if (g_class != GET_BE_WORD(pr->Class[l])) break;
2212 }
2213
2214 if (l < g_count-1)
2215 {
2216 TRACE("Rule does not match\n");
2217 continue;
2218 }
2219
2220 TRACE("Rule matches\n");
2221 pr_2 = (const GPOS_PosClassRule_2 *)&pr->Class[g_count - 1];
2222
2223 for (l = 0; l < GET_BE_WORD(pr->PosCount); l++)
2224 {
2225 unsigned int lookup_index = GET_BE_WORD(pr_2->PosLookupRecord[l].LookupListIndex);
2226 unsigned int sequence_index = GET_BE_WORD(pr_2->PosLookupRecord[l].SequenceIndex);
2227
2228 g = glyph_index + write_dir * sequence_index;
2229 if (g >= glyph_count)
2230 {
2231 WARN("Invalid sequence index %u (glyph index %u, write dir %d).\n",
2232 sequence_index, glyph_index, write_dir);
2233 continue;
2234 }
2235
2236 TRACE("Position: %u -> %u %u.\n", l, sequence_index, lookup_index);
2237
2238 GPOS_apply_lookup(script_cache, otm, logfont, analysis, advance,
2239 lookup, lookup_index, glyphs, g, glyph_count, goffset);
2240 }
2241 return 1;
2242 }
2243 }
2244
2245 TRACE("Not covered\n");
2246 continue;
2247 }
2248 else if (GET_BE_WORD(cpf2->PosFormat) == 3)
2249 {
2250 static int once;
2251 if (!once++)
2252 FIXME(" TODO: subtype 3\n");
2253 continue;
2254 }
2255 else
2256 FIXME("Unhandled Contextual Positioning Format %i\n",GET_BE_WORD(cpf2->PosFormat));
2257 }
2258 return 1;
2259 }
2260
2261 static unsigned int GPOS_apply_ChainContextPos(const ScriptCache *script_cache, const OUTLINETEXTMETRICW *otm,
2262 const LOGFONTW *logfont, const SCRIPT_ANALYSIS *analysis, int *advance, const OT_LookupList *lookup,
2263 const OT_LookupTable *look, const WORD *glyphs, unsigned int glyph_index, unsigned int glyph_count,
2264 GOFFSET *goffset)
2265 {
2266 int j;
2267 int write_dir = (analysis->fRTL && !analysis->fLogicalOrder) ? -1 : 1;
2268
2269 TRACE("Chaining Contextual Positioning Subtable\n");
2270
2271 for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++)
2272 {
2273 int offset;
2274 const GPOS_ChainContextPosFormat3_1 *backtrack = (GPOS_ChainContextPosFormat3_1 *)GPOS_get_subtable(look, j);
2275 int dirLookahead = write_dir;
2276 int dirBacktrack = -1 * write_dir;
2277
2278 if (GET_BE_WORD(backtrack->PosFormat) == 1)
2279 {
2280 static int once;
2281 if (!once++)
2282 FIXME(" TODO: subtype 1 (Simple Chaining Context Glyph Positioning)\n");
2283 continue;
2284 }
2285 else if (GET_BE_WORD(backtrack->PosFormat) == 2)
2286 {
2287 static int once;
2288 if (!once++)
2289 FIXME(" TODO: subtype 2 (Class-based Chaining Context Glyph Positioning)\n");
2290 continue;
2291 }
2292 else if (GET_BE_WORD(backtrack->PosFormat) == 3)
2293 {
2294 WORD backtrack_count, input_count, lookahead_count, positioning_count;
2295 int k;
2296 const GPOS_ChainContextPosFormat3_2 *input;
2297 const GPOS_ChainContextPosFormat3_3 *lookahead;
2298 const GPOS_ChainContextPosFormat3_4 *positioning;
2299
2300 TRACE(" subtype 3 (Coverage-based Chaining Context Glyph Positioning)\n");
2301
2302 backtrack_count = GET_BE_WORD(backtrack->BacktrackGlyphCount);
2303 k = glyph_index + dirBacktrack * backtrack_count;
2304 if (k < 0 || k >= glyph_count)
2305 continue;
2306
2307 input = (const GPOS_ChainContextPosFormat3_2 *)&backtrack->Coverage[backtrack_count];
2308 input_count = GET_BE_WORD(input->InputGlyphCount);
2309 k = glyph_index + write_dir * (input_count - 1);
2310 if (k < 0 || k >= glyph_count)
2311 continue;
2312
2313 lookahead = (const GPOS_ChainContextPosFormat3_3 *)&input->Coverage[input_count];
2314 lookahead_count = GET_BE_WORD(lookahead->LookaheadGlyphCount);
2315 k = glyph_index + dirLookahead * (input_count + lookahead_count - 1);
2316 if (k < 0 || k >= glyph_count)
2317 continue;
2318
2319 positioning = (const GPOS_ChainContextPosFormat3_4 *)&lookahead->Coverage[lookahead_count];
2320
2321 for (k = 0; k < backtrack_count; ++k)
2322 {
2323 offset = GET_BE_WORD(backtrack->Coverage[k]);
2324 if (GSUB_is_glyph_covered((const BYTE *)backtrack + offset,
2325 glyphs[glyph_index + (dirBacktrack * (k + 1))]) == -1)
2326 break;
2327 }
2328 if (k != backtrack_count)
2329 continue;
2330 TRACE("Matched Backtrack\n");
2331
2332 for (k = 0; k < input_count; ++k)
2333 {
2334 offset = GET_BE_WORD(input->Coverage[k]);
2335 if (GSUB_is_glyph_covered((const BYTE *)backtrack + offset,
2336 glyphs[glyph_index + (write_dir * k)]) == -1)
2337 break;
2338 }
2339 if (k != input_count)
2340 continue;
2341 TRACE("Matched IndexGlyphs\n");
2342
2343 for (k = 0; k < lookahead_count; ++k)
2344 {
2345 offset = GET_BE_WORD(lookahead->Coverage[k]);
2346 if (GSUB_is_glyph_covered((const BYTE *)backtrack + offset,
2347 glyphs[glyph_index + (dirLookahead * (input_count + k))]) == -1)
2348 break;
2349 }
2350 if (k != lookahead_count)
2351 continue;
2352 TRACE("Matched LookAhead\n");
2353
2354 if (!(positioning_count = GET_BE_WORD(positioning->PosCount)))
2355 return 1;
2356
2357 for (k = 0; k < positioning_count; ++k)
2358 {
2359 unsigned int lookup_index = GET_BE_WORD(positioning->PosLookupRecord[k].LookupListIndex);
2360 unsigned int sequence_index = GET_BE_WORD(positioning->PosLookupRecord[k].SequenceIndex);
2361 unsigned int g = glyph_index + write_dir * sequence_index;
2362
2363 if (g >= glyph_count)
2364 {
2365 WARN("Skipping invalid sequence index %u (glyph index %u, write dir %d).\n",
2366 sequence_index, glyph_index, write_dir);
2367 continue;
2368 }
2369
2370 TRACE("Position: %u -> %u %u.\n", k, sequence_index, lookup_index);
2371 GPOS_apply_lookup(script_cache, otm, logfont, analysis, advance, lookup, lookup_index,
2372 glyphs, g, glyph_count, goffset);
2373 }
2374 return input_count + lookahead_count;
2375 }
2376 else
2377 FIXME("Unhandled Chaining Contextual Positioning Format %#x.\n", GET_BE_WORD(backtrack->PosFormat));
2378 }
2379 return 1;
2380 }
2381
2382 static unsigned int GPOS_apply_lookup(const ScriptCache *script_cache, const OUTLINETEXTMETRICW *lpotm,
2383 const LOGFONTW *lplogfont, const SCRIPT_ANALYSIS *analysis, int *piAdvance, const OT_LookupList *lookup,
2384 unsigned int lookup_index, const WORD *glyphs, unsigned int glyph_index, unsigned int glyph_count,
2385 GOFFSET *pGoffset)
2386 {
2387 int offset;
2388 const OT_LookupTable *look;
2389 int ppem = lpotm->otmTextMetrics.tmAscent + lpotm->otmTextMetrics.tmDescent - lpotm->otmTextMetrics.tmInternalLeading;
2390 enum gpos_lookup_type type;
2391
2392 offset = GET_BE_WORD(lookup->Lookup[lookup_index]);
2393 look = (const OT_LookupTable*)((const BYTE*)lookup + offset);
2394 type = GET_BE_WORD(look->LookupType);
2395 TRACE("type %#x, flag %#x, subtables %u.\n", type,
2396 GET_BE_WORD(look->LookupFlag), GET_BE_WORD(look->SubTableCount));
2397
2398 if (type == GPOS_LOOKUP_POSITION_EXTENSION)
2399 {
2400 if (GET_BE_WORD(look->SubTableCount))
2401 {
2402 const GPOS_ExtensionPosFormat1 *ext = (const GPOS_ExtensionPosFormat1 *)((const BYTE *)look + GET_BE_WORD(look->SubTable[0]));
2403 if (GET_BE_WORD(ext->PosFormat) == 1)
2404 {
2405 type = GET_BE_WORD(ext->ExtensionLookupType);
2406 TRACE("extension type %i\n",type);
2407 }
2408 else
2409 {
2410 FIXME("Unhandled Extension Positioning Format %i\n",GET_BE_WORD(ext->PosFormat));
2411 }
2412 }
2413 else
2414 {
2415 WARN("lookup type is Extension Positioning but no extension subtable exists\n");
2416 }
2417 }
2418 switch (type)
2419 {
2420 case GPOS_LOOKUP_ADJUST_SINGLE:
2421 {
2422 double devX, devY;
2423 POINT adjust = {0,0};
2424 POINT advance = {0,0};
2425 GPOS_apply_SingleAdjustment(look, analysis, glyphs, glyph_index, glyph_count, ppem, &adjust, &advance);
2426 if (adjust.x || adjust.y)
2427 {
2428 GPOS_convert_design_units_to_device(lpotm, lplogfont, adjust.x, adjust.y, &devX, &devY);
2429 pGoffset[glyph_index].du += round(devX);
2430 pGoffset[glyph_index].dv += round(devY);
2431 }
2432 if (advance.x || advance.y)
2433 {
2434 GPOS_convert_design_units_to_device(lpotm, lplogfont, advance.x, advance.y, &devX, &devY);
2435 piAdvance[glyph_index] += round(devX);
2436 if (advance.y)
2437 FIXME("Unhandled adjustment to Y advancement\n");
2438 }
2439 break;
2440 }
2441
2442 case GPOS_LOOKUP_ADJUST_PAIR:
2443 {
2444 POINT advance[2]= {{0,0},{0,0}};
2445 POINT adjust[2]= {{0,0},{0,0}};
2446 double devX, devY;
2447 int index_offset;
2448 int write_dir = (analysis->fRTL && !analysis->fLogicalOrder) ? -1 : 1;
2449 int offset_sign = (analysis->fRTL && analysis->fLogicalOrder) ? -1 : 1;
2450
2451 index_offset = GPOS_apply_PairAdjustment(look, analysis, glyphs,
2452 glyph_index, glyph_count, ppem, adjust, advance);
2453 if (adjust[0].x || adjust[0].y)
2454 {
2455 GPOS_convert_design_units_to_device(lpotm, lplogfont, adjust[0].x, adjust[0].y, &devX, &devY);
2456 pGoffset[glyph_index].du += round(devX) * offset_sign;
2457 pGoffset[glyph_index].dv += round(devY);
2458 }
2459 if (advance[0].x || advance[0].y)
2460 {
2461 GPOS_convert_design_units_to_device(lpotm, lplogfont, advance[0].x, advance[0].y, &devX, &devY);
2462 piAdvance[glyph_index] += round(devX);
2463 }
2464 if (adjust[1].x || adjust[1].y)
2465 {
2466 GPOS_convert_design_units_to_device(lpotm, lplogfont, adjust[1].x, adjust[1].y, &devX, &devY);
2467 pGoffset[glyph_index + write_dir].du += round(devX) * offset_sign;
2468 pGoffset[glyph_index + write_dir].dv += round(devY);
2469 }
2470 if (advance[1].x || advance[1].y)
2471 {
2472 GPOS_convert_design_units_to_device(lpotm, lplogfont, advance[1].x, advance[1].y, &devX, &devY);
2473 piAdvance[glyph_index + write_dir] += round(devX);
2474 }
2475 return index_offset;
2476 }
2477
2478 case GPOS_LOOKUP_ATTACH_CURSIVE:
2479 {
2480 POINT desU = {0,0};
2481 double devX, devY;
2482 int write_dir = (analysis->fRTL && !analysis->fLogicalOrder) ? -1 : 1;
2483
2484 GPOS_apply_CursiveAttachment(look, analysis, glyphs, glyph_index, glyph_count, ppem, &desU);
2485 if (desU.x || desU.y)
2486 {
2487 GPOS_convert_design_units_to_device(lpotm, lplogfont, desU.x, desU.y, &devX, &devY);
2488 /* Windows does not appear to apply X offsets here */
2489 pGoffset[glyph_index].dv = round(devY) + pGoffset[glyph_index+write_dir].dv;
2490 }
2491 break;
2492 }
2493
2494 case GPOS_LOOKUP_ATTACH_MARK_TO_BASE:
2495 {
2496 double devX, devY;
2497 POINT desU = {0,0};
2498 int base_index = GPOS_apply_MarkToBase(script_cache, look, analysis,
2499 glyphs, glyph_index, glyph_count, ppem, &desU);
2500 if (base_index != -1)
2501 {
2502 GPOS_convert_design_units_to_device(lpotm, lplogfont, desU.x, desU.y, &devX, &devY);
2503 if (!analysis->fRTL) pGoffset[glyph_index].du = round(devX) - piAdvance[base_index];
2504 else
2505 {
2506 if (analysis->fLogicalOrder) devX *= -1;
2507 pGoffset[glyph_index].du = round(devX);
2508 }
2509 pGoffset[glyph_index].dv = round(devY);
2510 }
2511 break;
2512 }
2513
2514 case GPOS_LOOKUP_ATTACH_MARK_TO_LIGATURE:
2515 {
2516 double devX, devY;
2517 POINT desU = {0,0};
2518 GPOS_apply_MarkToLigature(look, analysis, glyphs, glyph_index, glyph_count, ppem, &desU);
2519 if (desU.x || desU.y)
2520 {
2521 GPOS_convert_design_units_to_device(lpotm, lplogfont, desU.x, desU.y, &devX, &devY);
2522 pGoffset[glyph_index].du = (round(devX) - piAdvance[glyph_index-1]);
2523 pGoffset[glyph_index].dv = round(devY);
2524 }
2525 break;
2526 }
2527
2528 case GPOS_LOOKUP_ATTACH_MARK_TO_MARK:
2529 {
2530 double devX, devY;
2531 POINT desU = {0,0};
2532 int write_dir = (analysis->fRTL && !analysis->fLogicalOrder) ? -1 : 1;
2533 if (GPOS_apply_MarkToMark(look, analysis, glyphs, glyph_index, glyph_count, ppem, &desU))
2534 {
2535 GPOS_convert_design_units_to_device(lpotm, lplogfont, desU.x, desU.y, &devX, &devY);
2536 if (analysis->fRTL && analysis->fLogicalOrder) devX *= -1;
2537 pGoffset[glyph_index].du = round(devX) + pGoffset[glyph_index - write_dir].du;
2538 pGoffset[glyph_index].dv = round(devY) + pGoffset[glyph_index - write_dir].dv;
2539 }
2540 break;
2541 }
2542
2543 case GPOS_LOOKUP_POSITION_CONTEXT:
2544 return GPOS_apply_ContextPos(script_cache, lpotm, lplogfont, analysis, piAdvance,
2545 lookup, look, glyphs, glyph_index, glyph_count, pGoffset);
2546
2547 case GPOS_LOOKUP_POSITION_CONTEXT_CHAINED:
2548 return GPOS_apply_ChainContextPos(script_cache, lpotm, lplogfont, analysis, piAdvance,
2549 lookup, look, glyphs, glyph_index, glyph_count, pGoffset);
2550
2551 default:
2552 FIXME("Unhandled GPOS lookup type %#x.\n", type);
2553 }
2554 return 1;
2555 }
2556
2557 unsigned int OpenType_apply_GPOS_lookup(const ScriptCache *script_cache, const OUTLINETEXTMETRICW *otm,
2558 const LOGFONTW *logfont, const SCRIPT_ANALYSIS *analysis, int *advance, unsigned int lookup_index,
2559 const WORD *glyphs, unsigned int glyph_index, unsigned int glyph_count, GOFFSET *goffset)
2560 {
2561 const GPOS_Header *header = (const GPOS_Header *)script_cache->GPOS_Table;
2562 const OT_LookupList *lookup = (const OT_LookupList*)((const BYTE*)header + GET_BE_WORD(header->LookupList));
2563
2564 return GPOS_apply_lookup(script_cache, otm, logfont, analysis, advance, lookup,
2565 lookup_index, glyphs, glyph_index, glyph_count, goffset);
2566 }
2567
2568 static LoadedScript *usp10_script_cache_add_script(ScriptCache *script_cache, OPENTYPE_TAG tag)
2569 {
2570 LoadedScript *script;
2571
2572 if (!usp10_array_reserve((void **)&script_cache->scripts, &script_cache->scripts_size,
2573 script_cache->script_count + 1, sizeof(*script_cache->scripts)))
2574 {
2575 ERR("Failed to grow scripts array.\n");
2576 return NULL;
2577 }
2578
2579 script = &script_cache->scripts[script_cache->script_count++];
2580 script->tag = tag;
2581
2582 return script;
2583 }
2584
2585 static LoadedScript *usp10_script_cache_get_script(ScriptCache *script_cache, OPENTYPE_TAG tag)
2586 {
2587 size_t i;
2588
2589 for (i = 0; i < script_cache->script_count; ++i)
2590 {
2591 if (script_cache->scripts[i].tag == tag)
2592 return &script_cache->scripts[i];
2593 }
2594
2595 return NULL;
2596 }
2597
2598 static void usp10_script_cache_add_script_list(ScriptCache *script_cache,
2599 enum usp10_script_table table, const OT_ScriptList *list)
2600 {
2601 SIZE_T initial_count, count, i;
2602 LoadedScript *script;
2603 OPENTYPE_TAG tag;
2604
2605 TRACE("script_cache %p, table %#x, list %p.\n", script_cache, table, list);
2606
2607 if (!(count = GET_BE_WORD(list->ScriptCount)))
2608 return;
2609
2610 TRACE("Adding %lu scripts.\n", count);
2611
2612 initial_count = script_cache->script_count;
2613 for (i = 0; i < count; ++i)
2614 {
2615 tag = MS_MAKE_TAG(list->ScriptRecord[i].ScriptTag[0],
2616 list->ScriptRecord[i].ScriptTag[1],
2617 list->ScriptRecord[i].ScriptTag[2],
2618 list->ScriptRecord[i].ScriptTag[3]);
2619
2620 if (!(initial_count && (script = usp10_script_cache_get_script(script_cache, tag)))
2621 && !(script = usp10_script_cache_add_script(script_cache, tag)))
2622 return;
2623
2624 script->table[table] = (const BYTE *)list + GET_BE_WORD(list->ScriptRecord[i].Script);
2625 }
2626 }
2627
2628 static void _initialize_script_cache(ScriptCache *script_cache)
2629 {
2630 const GPOS_Header *gpos_header;
2631 const GSUB_Header *gsub_header;
2632
2633 if (script_cache->scripts_initialized)
2634 return;
2635
2636 if ((gsub_header = script_cache->GSUB_Table))
2637 usp10_script_cache_add_script_list(script_cache, USP10_SCRIPT_TABLE_GSUB,
2638 (const OT_ScriptList *)((const BYTE *)gsub_header + GET_BE_WORD(gsub_header->ScriptList)));
2639
2640 if ((gpos_header = script_cache->GPOS_Table))
2641 usp10_script_cache_add_script_list(script_cache, USP10_SCRIPT_TABLE_GPOS,
2642 (const OT_ScriptList *)((const BYTE *)gpos_header + GET_BE_WORD(gpos_header->ScriptList)));
2643
2644 script_cache->scripts_initialized = TRUE;
2645 }
2646
2647 HRESULT OpenType_GetFontScriptTags(ScriptCache *psc, OPENTYPE_TAG searchingFor, int cMaxTags, OPENTYPE_TAG *pScriptTags, int *pcTags)
2648 {
2649 int i;
2650 const LoadedScript *script;
2651 HRESULT rc = S_OK;
2652
2653 _initialize_script_cache(psc);
2654
2655 *pcTags = psc->script_count;
2656
2657 if (searchingFor)
2658 {
2659 if (!(script = usp10_script_cache_get_script(psc, searchingFor)))
2660 return USP_E_SCRIPT_NOT_IN_FONT;
2661
2662 *pScriptTags = script->tag;
2663 *pcTags = 1;
2664 return S_OK;
2665 }
2666
2667 if (cMaxTags < *pcTags)
2668 rc = E_OUTOFMEMORY;
2669
2670 cMaxTags = min(cMaxTags, psc->script_count);
2671 for (i = 0; i < cMaxTags; ++i)
2672 {
2673 pScriptTags[i] = psc->scripts[i].tag;
2674 }
2675 return rc;
2676 }
2677
2678 static LoadedLanguage *usp10_script_add_language(LoadedScript *script, OPENTYPE_TAG tag)
2679 {
2680 LoadedLanguage *language;
2681
2682 if (!usp10_array_reserve((void **)&script->languages, &script->languages_size,
2683 script->language_count + 1, sizeof(*script->languages)))
2684 {
2685 ERR("Failed to grow languages array.\n");
2686 return NULL;
2687 }
2688
2689 language = &script->languages[script->language_count++];
2690 language->tag = tag;
2691
2692 return language;
2693 }
2694
2695 static LoadedLanguage *usp10_script_get_language(LoadedScript *script, OPENTYPE_TAG tag)
2696 {
2697 size_t i;
2698
2699 for (i = 0; i < script->language_count; ++i)
2700 {
2701 if (script->languages[i].tag == tag)
2702 return &script->languages[i];
2703 }
2704
2705 return NULL;
2706 }
2707
2708 static void usp10_script_add_language_list(LoadedScript *script,
2709 enum usp10_language_table table, const OT_Script *list)
2710 {
2711 SIZE_T initial_count, count, i;
2712 LoadedLanguage *language;
2713 OPENTYPE_TAG tag;
2714 DWORD offset;
2715
2716 TRACE("script %p, table %#x, list %p.\n", script, table, list);
2717
2718 if ((offset = GET_BE_WORD(list->DefaultLangSys)))
2719 {
2720 script->default_language.tag = MS_MAKE_TAG('d','f','l','t');
2721 script->default_language.table[table] = (const BYTE *)list + offset;
2722 TRACE("Default language %p.\n", script->default_language.table[table]);
2723 }
2724
2725 if (!(count = GET_BE_WORD(list->LangSysCount)))
2726 return;
2727
2728 TRACE("Adding %lu languages.\n", count);
2729
2730 initial_count = script->language_count;
2731 for (i = 0; i < count; ++i)
2732 {
2733 tag = MS_MAKE_TAG(list->LangSysRecord[i].LangSysTag[0],
2734 list->LangSysRecord[i].LangSysTag[1],
2735 list->LangSysRecord[i].LangSysTag[2],
2736 list->LangSysRecord[i].LangSysTag[3]);
2737
2738 if (!(initial_count && (language = usp10_script_get_language(script, tag)))
2739 && !(language = usp10_script_add_language(script, tag)))
2740 return;
2741
2742 language->table[table] = (const BYTE *)list + GET_BE_WORD(list->LangSysRecord[i].LangSys);
2743 }
2744 }
2745
2746 static void _initialize_language_cache(LoadedScript *script)
2747 {
2748 const OT_Script *list;
2749
2750 if (script->languages_initialized)
2751 return;
2752
2753 if ((list = script->table[USP10_SCRIPT_TABLE_GSUB]))
2754 usp10_script_add_language_list(script, USP10_LANGUAGE_TABLE_GSUB, list);
2755 if ((list = script->table[USP10_SCRIPT_TABLE_GPOS]))
2756 usp10_script_add_language_list(script, USP10_LANGUAGE_TABLE_GPOS, list);
2757
2758 script->languages_initialized = TRUE;
2759 }
2760
2761 HRESULT OpenType_GetFontLanguageTags(ScriptCache *psc, OPENTYPE_TAG script_tag, OPENTYPE_TAG searchingFor, int cMaxTags, OPENTYPE_TAG *pLanguageTags, int *pcTags)
2762 {
2763 int i;
2764 HRESULT rc = S_OK;
2765 LoadedScript *script = NULL;
2766
2767 _initialize_script_cache(psc);
2768 if (!(script = usp10_script_cache_get_script(psc, script_tag)))
2769 return E_INVALIDARG;
2770
2771 _initialize_language_cache(script);
2772
2773 if (!searchingFor && cMaxTags < script->language_count)
2774 rc = E_OUTOFMEMORY;
2775 else if (searchingFor)
2776 rc = E_INVALIDARG;
2777
2778 *pcTags = script->language_count;
2779
2780 for (i = 0; i < script->language_count; i++)
2781 {
2782 if (i < cMaxTags)
2783 pLanguageTags[i] = script->languages[i].tag;
2784
2785 if (searchingFor)
2786 {
2787 if (searchingFor == script->languages[i].tag)
2788 {
2789 pLanguageTags[0] = script->languages[i].tag;
2790 *pcTags = 1;
2791 rc = S_OK;
2792 break;
2793 }
2794 }
2795 }
2796
2797 if (script->default_language.table[USP10_LANGUAGE_TABLE_GSUB])
2798 {
2799 if (i < cMaxTags)
2800 pLanguageTags[i] = script->default_language.tag;
2801
2802 if (searchingFor && FAILED(rc))
2803 {
2804 pLanguageTags[0] = script->default_language.tag;
2805 }
2806 i++;
2807 *pcTags = (*pcTags) + 1;
2808 }
2809
2810 return rc;
2811 }
2812
2813 static void usp10_language_add_feature_list(LoadedLanguage *language, char table_type,
2814 const OT_LangSys *lang, const OT_FeatureList *feature_list)
2815 {
2816 unsigned int count = GET_BE_WORD(lang->FeatureCount);
2817 unsigned int i, j;
2818
2819 TRACE("table_type %#x, %u features.\n", table_type, count);
2820
2821 if (!count || !usp10_array_reserve((void **)&language->features, &language->features_size,
2822 language->feature_count + count, sizeof(*language->features)))
2823 return;
2824
2825 for (i = 0; i < count; ++i)
2826 {
2827 const OT_FeatureRecord *record;
2828 LoadedFeature *loaded_feature;
2829 const OT_Feature *feature;
2830
2831 record = &feature_list->FeatureRecord[GET_BE_WORD(lang->FeatureIndex[i])];
2832 feature = (const OT_Feature *)((const BYTE *)feature_list + GET_BE_WORD(record->Feature));
2833
2834 loaded_feature = &language->features[language->feature_count + i];
2835 loaded_feature->tag = MS_MAKE_TAG(record->FeatureTag[0], record->FeatureTag[1],
2836 record->FeatureTag[2], record->FeatureTag[3]);
2837 loaded_feature->tableType = table_type;
2838 loaded_feature->feature = feature;
2839 loaded_feature->lookup_count = GET_BE_WORD(feature->LookupCount);
2840 loaded_feature->lookups = heap_calloc(loaded_feature->lookup_count, sizeof(*loaded_feature->lookups));
2841 for (j = 0; j < loaded_feature->lookup_count; ++j)
2842 loaded_feature->lookups[j] = GET_BE_WORD(feature->LookupListIndex[j]);
2843 }
2844 language->feature_count += count;
2845 }
2846
2847 static void _initialize_feature_cache(ScriptCache *psc, LoadedLanguage *language)
2848 {
2849 const GSUB_Header *gsub_header = psc->GSUB_Table;
2850 const GPOS_Header *gpos_header = psc->GPOS_Table;
2851 const OT_FeatureList *feature_list;
2852 const OT_LangSys *lang;
2853
2854 if (language->features_initialized)
2855 return;
2856
2857 if ((lang = language->table[USP10_LANGUAGE_TABLE_GSUB]))
2858 {
2859 feature_list = (const OT_FeatureList *)((const BYTE *)gsub_header + GET_BE_WORD(gsub_header->FeatureList));
2860 usp10_language_add_feature_list(language, FEATURE_GSUB_TABLE, lang, feature_list);
2861 }
2862
2863 if ((lang = language->table[USP10_LANGUAGE_TABLE_GPOS]))
2864 {
2865 feature_list = (const OT_FeatureList *)((const BYTE *)gpos_header + GET_BE_WORD(gpos_header->FeatureList));
2866 usp10_language_add_feature_list(language, FEATURE_GPOS_TABLE, lang, feature_list);
2867 }
2868
2869 language->features_initialized = TRUE;
2870 }
2871
2872 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)
2873 {
2874 int i;
2875 LoadedLanguage *language;
2876 LoadedScript *script;
2877 HRESULT rc = S_OK;
2878
2879 _initialize_script_cache(psc);
2880 if (!(script = usp10_script_cache_get_script(psc, script_tag)))
2881 {
2882 *pcTags = 0;
2883 if (!filtered)
2884 return S_OK;
2885 else
2886 return E_INVALIDARG;
2887 }
2888
2889 _initialize_language_cache(script);
2890
2891 language = &script->default_language;
2892 if (language->tag != language_tag || (!language->table[USP10_LANGUAGE_TABLE_GSUB]
2893 && !language->table[USP10_LANGUAGE_TABLE_GPOS]))
2894 language = usp10_script_get_language(script, language_tag);
2895
2896 if (!language)
2897 {
2898 *pcTags = 0;
2899 return S_OK;
2900 }
2901
2902 _initialize_feature_cache(psc, language);
2903
2904 if (tableType)
2905 {
2906 *pcTags = 0;
2907 for (i = 0; i < language->feature_count; i++)
2908 if (language->features[i].tableType == tableType)
2909 *pcTags = (*pcTags)+1;
2910 }
2911 else
2912 *pcTags = language->feature_count;
2913
2914 if (!searchingFor && cMaxTags < *pcTags)
2915 rc = E_OUTOFMEMORY;
2916 else if (searchingFor)
2917 rc = E_INVALIDARG;
2918
2919 for (i = 0; i < language->feature_count; i++)
2920 {
2921 if (i < cMaxTags)
2922 {
2923 if (!tableType || language->features[i].tableType == tableType)
2924 pFeatureTags[i] = language->features[i].tag;
2925 }
2926
2927 if (searchingFor)
2928 {
2929 if ((searchingFor == language->features[i].tag) &&
2930 (!tableType || language->features[i].tableType == tableType))
2931 {
2932 pFeatureTags[0] = language->features[i].tag;
2933 *pcTags = 1;
2934 if (feature)
2935 *feature = &language->features[i];
2936 rc = S_OK;
2937 break;
2938 }
2939 }
2940 }
2941 return rc;
2942 }
Windows API implementation