| /* |
| * Implementation of Shaping for the Uniscribe Script Processor (usp10.dll) |
| * |
| * Copyright 2010 CodeWeavers, Aric Stewart |
| * |
| * This library is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU Lesser General Public |
| * License as published by the Free Software Foundation; either |
| * version 2.1 of the License, or (at your option) any later version. |
| * |
| * This library is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| * Lesser General Public License for more details. |
| * |
| * You should have received a copy of the GNU Lesser General Public |
| * License along with this library; if not, write to the Free Software |
| * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA |
| * |
| */ |
| #include <stdarg.h> |
| |
| #include "windef.h" |
| #include "winbase.h" |
| #include "wingdi.h" |
| #include "winuser.h" |
| #include "winnls.h" |
| #include "usp10.h" |
| #include "winternl.h" |
| |
| #include "usp10_internal.h" |
| |
| #include "wine/debug.h" |
| |
| WINE_DEFAULT_DEBUG_CHANNEL(uniscribe); |
| |
| #define FIRST_ARABIC_CHAR 0x0600 |
| #define LAST_ARABIC_CHAR 0x06ff |
| |
| typedef VOID (*ContextualShapingProc)(HDC, ScriptCache*, SCRIPT_ANALYSIS*, |
| WCHAR*, INT, WORD*, INT*, INT, WORD*); |
| |
| static void ContextualShape_Arabic(HDC hdc, ScriptCache *psc, SCRIPT_ANALYSIS *psa, WCHAR* pwcChars, INT cChars, WORD* pwOutGlyphs, INT* pcGlyphs, INT cMaxGlyphs, WORD *pwLogClust); |
| static void ContextualShape_Syriac(HDC hdc, ScriptCache *psc, SCRIPT_ANALYSIS *psa, WCHAR* pwcChars, INT cChars, WORD* pwOutGlyphs, INT* pcGlyphs, INT cMaxGlyphs, WORD *pwLogClust); |
| static void ContextualShape_Phags_pa(HDC hdc, ScriptCache *psc, SCRIPT_ANALYSIS *psa, WCHAR* pwcChars, INT cChars, WORD* pwOutGlyphs, INT* pcGlyphs, INT cMaxGlyphs, WORD *pwLogClust); |
| |
| extern const unsigned short wine_shaping_table[]; |
| extern const unsigned short wine_shaping_forms[LAST_ARABIC_CHAR - FIRST_ARABIC_CHAR + 1][4]; |
| |
| enum joining_types { |
| jtU, |
| jtT, |
| jtR, |
| jtL, |
| jtD, |
| jtC |
| }; |
| |
| enum joined_forms { |
| Xn=0, |
| Xr, |
| Xl, |
| Xm, |
| /* Syriac Alaph */ |
| Afj, |
| Afn, |
| Afx |
| }; |
| |
| #ifdef WORDS_BIGENDIAN |
| #define GET_BE_WORD(x) (x) |
| #else |
| #define GET_BE_WORD(x) RtlUshortByteSwap(x) |
| #endif |
| |
| /* These are all structures needed for the GSUB table */ |
| #define MS_MAKE_TAG( _x1, _x2, _x3, _x4 ) \ |
| ( ( (ULONG)_x4 << 24 ) | \ |
| ( (ULONG)_x3 << 16 ) | \ |
| ( (ULONG)_x2 << 8 ) | \ |
| (ULONG)_x1 ) |
| |
| #define GSUB_TAG MS_MAKE_TAG('G', 'S', 'U', 'B') |
| #define GSUB_E_NOFEATURE -2 |
| #define GSUB_E_NOGLYPH -1 |
| |
| typedef struct { |
| DWORD version; |
| WORD ScriptList; |
| WORD FeatureList; |
| WORD LookupList; |
| } GSUB_Header; |
| |
| typedef struct { |
| CHAR ScriptTag[4]; |
| WORD Script; |
| } GSUB_ScriptRecord; |
| |
| typedef struct { |
| WORD ScriptCount; |
| GSUB_ScriptRecord ScriptRecord[1]; |
| } GSUB_ScriptList; |
| |
| typedef struct { |
| CHAR LangSysTag[4]; |
| WORD LangSys; |
| } GSUB_LangSysRecord; |
| |
| typedef struct { |
| WORD DefaultLangSys; |
| WORD LangSysCount; |
| GSUB_LangSysRecord LangSysRecord[1]; |
| } GSUB_Script; |
| |
| typedef struct { |
| WORD LookupOrder; /* Reserved */ |
| WORD ReqFeatureIndex; |
| WORD FeatureCount; |
| WORD FeatureIndex[1]; |
| } GSUB_LangSys; |
| |
| typedef struct { |
| CHAR FeatureTag[4]; |
| WORD Feature; |
| } GSUB_FeatureRecord; |
| |
| typedef struct { |
| WORD FeatureCount; |
| GSUB_FeatureRecord FeatureRecord[1]; |
| } GSUB_FeatureList; |
| |
| typedef struct { |
| WORD FeatureParams; /* Reserved */ |
| WORD LookupCount; |
| WORD LookupListIndex[1]; |
| } GSUB_Feature; |
| |
| typedef struct { |
| WORD LookupCount; |
| WORD Lookup[1]; |
| } GSUB_LookupList; |
| |
| typedef struct { |
| WORD LookupType; |
| WORD LookupFlag; |
| WORD SubTableCount; |
| WORD SubTable[1]; |
| } GSUB_LookupTable; |
| |
| typedef struct { |
| WORD CoverageFormat; |
| WORD GlyphCount; |
| WORD GlyphArray[1]; |
| } GSUB_CoverageFormat1; |
| |
| typedef struct { |
| WORD Start; |
| WORD End; |
| WORD StartCoverageIndex; |
| } GSUB_RangeRecord; |
| |
| typedef struct { |
| WORD CoverageFormat; |
| WORD RangeCount; |
| GSUB_RangeRecord RangeRecord[1]; |
| } GSUB_CoverageFormat2; |
| |
| typedef struct { |
| WORD SubstFormat; /* = 1 */ |
| WORD Coverage; |
| WORD DeltaGlyphID; |
| } GSUB_SingleSubstFormat1; |
| |
| typedef struct { |
| WORD SubstFormat; /* = 2 */ |
| WORD Coverage; |
| WORD GlyphCount; |
| WORD Substitute[1]; |
| }GSUB_SingleSubstFormat2; |
| |
| typedef struct { |
| WORD SubstFormat; /* = 1 */ |
| WORD Coverage; |
| WORD LigSetCount; |
| WORD LigatureSet[1]; |
| }GSUB_LigatureSubstFormat1; |
| |
| typedef struct { |
| WORD LigatureCount; |
| WORD Ligature[1]; |
| }GSUB_LigatureSet; |
| |
| typedef struct{ |
| WORD LigGlyph; |
| WORD CompCount; |
| WORD Component[1]; |
| }GSUB_Ligature; |
| |
| typedef struct{ |
| WORD SequenceIndex; |
| WORD LookupListIndex; |
| |
| }GSUB_SubstLookupRecord; |
| |
| typedef struct{ |
| WORD SubstFormat; /* = 1 */ |
| WORD Coverage; |
| WORD ChainSubRuleSetCount; |
| WORD ChainSubRuleSet[1]; |
| }GSUB_ChainContextSubstFormat1; |
| |
| typedef struct { |
| WORD SubstFormat; /* = 3 */ |
| WORD BacktrackGlyphCount; |
| WORD Coverage[1]; |
| }GSUB_ChainContextSubstFormat3_1; |
| |
| typedef struct{ |
| WORD InputGlyphCount; |
| WORD Coverage[1]; |
| }GSUB_ChainContextSubstFormat3_2; |
| |
| typedef struct{ |
| WORD LookaheadGlyphCount; |
| WORD Coverage[1]; |
| }GSUB_ChainContextSubstFormat3_3; |
| |
| typedef struct{ |
| WORD SubstCount; |
| GSUB_SubstLookupRecord SubstLookupRecord[1]; |
| }GSUB_ChainContextSubstFormat3_4; |
| |
| typedef struct { |
| WORD SubstFormat; /* = 1 */ |
| WORD Coverage; |
| WORD AlternateSetCount; |
| WORD AlternateSet[1]; |
| } GSUB_AlternateSubstFormat1; |
| |
| typedef struct{ |
| WORD GlyphCount; |
| WORD Alternate[1]; |
| } GSUB_AlternateSet; |
| |
| static INT GSUB_apply_lookup(const GSUB_LookupList* lookup, INT lookup_index, WORD *glyphs, INT glyph_index, INT write_dir, INT *glyph_count); |
| |
| /* the orders of joined_forms and contextual_features need to line up */ |
| static const char* contextual_features[] = |
| { |
| "isol", |
| "fina", |
| "init", |
| "medi", |
| /* Syriac Alaph */ |
| "med2", |
| "fin2", |
| "fin3" |
| }; |
| |
| static OPENTYPE_FEATURE_RECORD standard_features[] = |
| { |
| { 0x6167696c /*liga*/, 1}, |
| { 0x67696c63 /*clig*/, 1}, |
| }; |
| |
| static OPENTYPE_FEATURE_RECORD arabic_features[] = |
| { |
| { 0x67696c72 /*rlig*/, 1}, |
| { 0x746c6163 /*calt*/, 1}, |
| { 0x6167696c /*liga*/, 1}, |
| { 0x67696c64 /*dlig*/, 1}, |
| { 0x68777363 /*cswh*/, 1}, |
| { 0x7465736d /*mset*/, 1}, |
| }; |
| |
| static const char* required_arabic_features[] = |
| { |
| "fina", |
| "init", |
| "medi", |
| "rlig", |
| NULL |
| }; |
| |
| static OPENTYPE_FEATURE_RECORD hebrew_features[] = |
| { |
| { 0x67696c64 /*dlig*/, 1}, |
| }; |
| |
| static OPENTYPE_FEATURE_RECORD syriac_features[] = |
| { |
| { 0x67696c72 /*rlig*/, 1}, |
| { 0x746c6163 /*calt*/, 1}, |
| { 0x6167696c /*liga*/, 1}, |
| { 0x67696c64 /*dlig*/, 1}, |
| }; |
| |
| static const char* required_syriac_features[] = |
| { |
| "fina", |
| "fin2", |
| "fin3", |
| "init", |
| "medi", |
| "med2", |
| "rlig", |
| NULL |
| }; |
| |
| static OPENTYPE_FEATURE_RECORD sinhala_features[] = |
| { |
| /* Base forms */ |
| { 0x6e686b61 /*akhn*/, 1}, |
| { 0x66687072 /*rphf*/, 1}, |
| { 0x75746176 /*vatu*/, 1}, |
| { 0x66747370 /*pstf*/, 1}, |
| /* Presentation forms */ |
| { 0x73776c62 /*blws*/, 1}, |
| { 0x73766261 /*abvs*/, 1}, |
| { 0x73747370 /*psts*/, 1}, |
| }; |
| |
| static OPENTYPE_FEATURE_RECORD tibetan_features[] = |
| { |
| { 0x73766261 /*abvs*/, 1}, |
| { 0x73776c62 /*blws*/, 1}, |
| }; |
| |
| static OPENTYPE_FEATURE_RECORD thai_features[] = |
| { |
| { 0x706d6363 /*ccmp*/, 1}, |
| }; |
| |
| static const char* required_lao_features[] = |
| { |
| "ccmp", |
| NULL |
| }; |
| |
| typedef struct ScriptShapeDataTag { |
| TEXTRANGE_PROPERTIES defaultTextRange; |
| const char** requiredFeatures; |
| CHAR otTag[5]; |
| ContextualShapingProc contextProc; |
| } ScriptShapeData; |
| |
| /* in order of scripts */ |
| static const ScriptShapeData ShapingData[] = |
| { |
| {{ standard_features, 2}, NULL, "", NULL}, |
| {{ standard_features, 2}, NULL, "latn", NULL}, |
| {{ standard_features, 2}, NULL, "latn", NULL}, |
| {{ standard_features, 2}, NULL, "latn", NULL}, |
| {{ standard_features, 2}, NULL, "" , NULL}, |
| {{ standard_features, 2}, NULL, "latn", NULL}, |
| {{ arabic_features, 6}, required_arabic_features, "arab", ContextualShape_Arabic}, |
| {{ arabic_features, 6}, required_arabic_features, "arab", ContextualShape_Arabic}, |
| {{ hebrew_features, 1}, NULL, "hebr", NULL}, |
| {{ syriac_features, 4}, required_syriac_features, "syrc", ContextualShape_Syriac}, |
| {{ arabic_features, 6}, required_arabic_features, "arab", ContextualShape_Arabic}, |
| {{ NULL, 0}, NULL, "thaa", NULL}, |
| {{ standard_features, 2}, NULL, "grek", NULL}, |
| {{ standard_features, 2}, NULL, "cyrl", NULL}, |
| {{ standard_features, 2}, NULL, "armn", NULL}, |
| {{ standard_features, 2}, NULL, "geor", NULL}, |
| {{ sinhala_features, 7}, NULL, "sinh", NULL}, |
| {{ tibetan_features, 2}, NULL, "tibt", NULL}, |
| {{ tibetan_features, 2}, NULL, "tibt", NULL}, |
| {{ tibetan_features, 2}, NULL, "phag", ContextualShape_Phags_pa}, |
| {{ thai_features, 1}, NULL, "thai", NULL}, |
| {{ thai_features, 1}, NULL, "thai", NULL}, |
| {{ thai_features, 1}, required_lao_features, "lao", NULL}, |
| {{ thai_features, 1}, required_lao_features, "lao", NULL}, |
| }; |
| |
| static INT GSUB_is_glyph_covered(LPCVOID table , UINT glyph) |
| { |
| const GSUB_CoverageFormat1* cf1; |
| |
| cf1 = table; |
| |
| if (GET_BE_WORD(cf1->CoverageFormat) == 1) |
| { |
| int count = GET_BE_WORD(cf1->GlyphCount); |
| int i; |
| TRACE("Coverage Format 1, %i glyphs\n",count); |
| for (i = 0; i < count; i++) |
| if (glyph == GET_BE_WORD(cf1->GlyphArray[i])) |
| return i; |
| return -1; |
| } |
| else if (GET_BE_WORD(cf1->CoverageFormat) == 2) |
| { |
| const GSUB_CoverageFormat2* cf2; |
| int i; |
| int count; |
| cf2 = (const GSUB_CoverageFormat2*)cf1; |
| |
| count = GET_BE_WORD(cf2->RangeCount); |
| TRACE("Coverage Format 2, %i ranges\n",count); |
| for (i = 0; i < count; i++) |
| { |
| if (glyph < GET_BE_WORD(cf2->RangeRecord[i].Start)) |
| return -1; |
| if ((glyph >= GET_BE_WORD(cf2->RangeRecord[i].Start)) && |
| (glyph <= GET_BE_WORD(cf2->RangeRecord[i].End))) |
| { |
| return (GET_BE_WORD(cf2->RangeRecord[i].StartCoverageIndex) + |
| glyph - GET_BE_WORD(cf2->RangeRecord[i].Start)); |
| } |
| } |
| return -1; |
| } |
| else |
| ERR("Unknown CoverageFormat %i\n",GET_BE_WORD(cf1->CoverageFormat)); |
| |
| return -1; |
| } |
| |
| static const GSUB_Script* GSUB_get_script_table( const GSUB_Header* header, const char* tag) |
| { |
| const GSUB_ScriptList *script; |
| const GSUB_Script *deflt = NULL; |
| int i; |
| script = (const GSUB_ScriptList*)((const BYTE*)header + GET_BE_WORD(header->ScriptList)); |
| |
| TRACE("%i scripts in this font\n",GET_BE_WORD(script->ScriptCount)); |
| for (i = 0; i < GET_BE_WORD(script->ScriptCount); i++) |
| { |
| const GSUB_Script *scr; |
| int offset; |
| |
| offset = GET_BE_WORD(script->ScriptRecord[i].Script); |
| scr = (const GSUB_Script*)((const BYTE*)script + offset); |
| |
| if (strncmp(script->ScriptRecord[i].ScriptTag, tag,4)==0) |
| return scr; |
| if (strncmp(script->ScriptRecord[i].ScriptTag, "dflt",4)==0) |
| deflt = scr; |
| } |
| return deflt; |
| } |
| |
| static const GSUB_LangSys* GSUB_get_lang_table( const GSUB_Script* script, const char* tag) |
| { |
| int i; |
| int offset; |
| const GSUB_LangSys *Lang; |
| |
| TRACE("Deflang %x, LangCount %i\n",GET_BE_WORD(script->DefaultLangSys), GET_BE_WORD(script->LangSysCount)); |
| |
| for (i = 0; i < GET_BE_WORD(script->LangSysCount) ; i++) |
| { |
| offset = GET_BE_WORD(script->LangSysRecord[i].LangSys); |
| Lang = (const GSUB_LangSys*)((const BYTE*)script + offset); |
| |
| if ( strncmp(script->LangSysRecord[i].LangSysTag,tag,4)==0) |
| return Lang; |
| } |
| offset = GET_BE_WORD(script->DefaultLangSys); |
| if (offset) |
| { |
| Lang = (const GSUB_LangSys*)((const BYTE*)script + offset); |
| return Lang; |
| } |
| return NULL; |
| } |
| |
| static const GSUB_Feature * GSUB_get_feature(const GSUB_Header *header, const GSUB_LangSys *lang, const char* tag) |
| { |
| int i; |
| const GSUB_FeatureList *feature; |
| feature = (const GSUB_FeatureList*)((const BYTE*)header + GET_BE_WORD(header->FeatureList)); |
| |
| TRACE("%i features\n",GET_BE_WORD(lang->FeatureCount)); |
| for (i = 0; i < GET_BE_WORD(lang->FeatureCount); i++) |
| { |
| int index = GET_BE_WORD(lang->FeatureIndex[i]); |
| if (strncmp(feature->FeatureRecord[index].FeatureTag,tag,4)==0) |
| { |
| const GSUB_Feature *feat; |
| feat = (const GSUB_Feature*)((const BYTE*)feature + GET_BE_WORD(feature->FeatureRecord[index].Feature)); |
| return feat; |
| } |
| } |
| return NULL; |
| } |
| |
| static INT GSUB_apply_SingleSubst(const GSUB_LookupTable *look, WORD *glyphs, INT glyph_index, INT write_dir, INT *glyph_count) |
| { |
| int j; |
| TRACE("Single Substitution Subtable\n"); |
| |
| for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++) |
| { |
| int offset; |
| const GSUB_SingleSubstFormat1 *ssf1; |
| offset = GET_BE_WORD(look->SubTable[j]); |
| ssf1 = (const GSUB_SingleSubstFormat1*)((const BYTE*)look+offset); |
| if (GET_BE_WORD(ssf1->SubstFormat) == 1) |
| { |
| int offset = GET_BE_WORD(ssf1->Coverage); |
| TRACE(" subtype 1, delta %i\n", GET_BE_WORD(ssf1->DeltaGlyphID)); |
| if (GSUB_is_glyph_covered((const BYTE*)ssf1+offset, glyphs[glyph_index]) != -1) |
| { |
| TRACE(" Glyph 0x%x ->",glyphs[glyph_index]); |
| glyphs[glyph_index] = glyphs[glyph_index] + GET_BE_WORD(ssf1->DeltaGlyphID); |
| TRACE(" 0x%x\n",glyphs[glyph_index]); |
| return glyph_index + 1; |
| } |
| } |
| else |
| { |
| const GSUB_SingleSubstFormat2 *ssf2; |
| INT index; |
| INT offset; |
| |
| ssf2 = (const GSUB_SingleSubstFormat2 *)ssf1; |
| offset = GET_BE_WORD(ssf1->Coverage); |
| TRACE(" subtype 2, glyph count %i\n", GET_BE_WORD(ssf2->GlyphCount)); |
| index = GSUB_is_glyph_covered((const BYTE*)ssf2+offset, glyphs[glyph_index]); |
| TRACE(" Coverage index %i\n",index); |
| if (index != -1) |
| { |
| TRACE(" Glyph is 0x%x ->",glyphs[glyph_index]); |
| glyphs[glyph_index] = GET_BE_WORD(ssf2->Substitute[index]); |
| TRACE("0x%x\n",glyphs[glyph_index]); |
| return glyph_index + 1; |
| } |
| } |
| } |
| return GSUB_E_NOGLYPH; |
| } |
| |
| static INT GSUB_apply_AlternateSubst(const GSUB_LookupTable *look, WORD *glyphs, INT glyph_index, INT write_dir, INT *glyph_count) |
| { |
| int j; |
| TRACE("Alternate Substitution Subtable\n"); |
| |
| for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++) |
| { |
| int offset; |
| const GSUB_AlternateSubstFormat1 *asf1; |
| INT index; |
| |
| offset = GET_BE_WORD(look->SubTable[j]); |
| asf1 = (const GSUB_AlternateSubstFormat1*)((const BYTE*)look+offset); |
| offset = GET_BE_WORD(asf1->Coverage); |
| |
| index = GSUB_is_glyph_covered((const BYTE*)asf1+offset, glyphs[glyph_index]); |
| if (index != -1) |
| { |
| const GSUB_AlternateSet *as; |
| offset = GET_BE_WORD(asf1->AlternateSet[index]); |
| as = (const GSUB_AlternateSet*)((const BYTE*)asf1+offset); |
| FIXME("%i alternates, picking index 0\n",GET_BE_WORD(as->GlyphCount)); |
| |
| TRACE(" Glyph 0x%x ->",glyphs[glyph_index]); |
| glyphs[glyph_index] = GET_BE_WORD(as->Alternate[0]); |
| TRACE(" 0x%x\n",glyphs[glyph_index]); |
| return glyph_index + 1; |
| } |
| } |
| return GSUB_E_NOGLYPH; |
| } |
| |
| static INT GSUB_apply_LigatureSubst(const GSUB_LookupTable *look, WORD *glyphs, INT glyph_index, INT write_dir, INT *glyph_count) |
| { |
| int j; |
| |
| TRACE("Ligature Substitution Subtable\n"); |
| for (j = 0; j < GET_BE_WORD(look->SubTableCount); j++) |
| { |
| const GSUB_LigatureSubstFormat1 *lsf1; |
| int offset,index; |
| |
| offset = GET_BE_WORD(look->SubTable[j]); |
| lsf1 = (const GSUB_LigatureSubstFormat1*)((const BYTE*)look+offset); |
| offset = GET_BE_WORD(lsf1->Coverage); |
| index = GSUB_is_glyph_covered((const BYTE*)lsf1+offset, glyphs[glyph_index]); |
| TRACE(" Coverage index %i\n",index); |
| if (index != -1) |
| { |
| const GSUB_LigatureSet *ls; |
| int k, count; |
| |
| offset = GET_BE_WORD(lsf1->LigatureSet[index]); |
| ls = (const GSUB_LigatureSet*)((const BYTE*)lsf1+offset); |
| count = GET_BE_WORD(ls->LigatureCount); |
| TRACE(" LigatureSet has %i members\n",count); |
| for (k = 0; k < count; k++) |
| { |
| const GSUB_Ligature *lig; |
| int CompCount,l,CompIndex; |
| |
| offset = GET_BE_WORD(ls->Ligature[k]); |
| lig = (const GSUB_Ligature*)((const BYTE*)ls+offset); |
| CompCount = GET_BE_WORD(lig->CompCount) - 1; |
| CompIndex = glyph_index+write_dir; |
| for (l = 0; l < CompCount && CompIndex >= 0 && CompIndex < *glyph_count; l++) |
| { |
| int CompGlyph; |
| CompGlyph = GET_BE_WORD(lig->Component[l]); |
| if (CompGlyph != glyphs[CompIndex]) |
| break; |
| CompIndex += write_dir; |
| } |
| if (l == CompCount) |
| { |
| int replaceIdx = glyph_index; |
| if (write_dir < 0) |
| replaceIdx = glyph_index - CompCount; |
| |
| TRACE(" Glyph is 0x%x (+%i) ->",glyphs[glyph_index],CompCount); |
| glyphs[replaceIdx] = GET_BE_WORD(lig->LigGlyph); |
| TRACE("0x%x\n",glyphs[replaceIdx]); |
| if (CompCount > 0) |
| { |
| int j; |
| for (j = replaceIdx + 1; j < *glyph_count; j++) |
| glyphs[j] =glyphs[j+CompCount]; |
| *glyph_count = *glyph_count - CompCount; |
| } |
| return replaceIdx + 1; |
| } |
| } |
| } |
| } |
| return GSUB_E_NOGLYPH; |
| } |
| |
| static INT GSUB_apply_ChainContextSubst(const GSUB_LookupList* lookup, const GSUB_LookupTable *look, WORD *glyphs, INT glyph_index, INT write_dir, INT *glyph_count) |
| { |
| int j; |
| BOOL done = FALSE; |
| |
| TRACE("Chaining Contextual Substitution Subtable\n"); |
| for (j = 0; j < GET_BE_WORD(look->SubTableCount) && !done; j++) |
| { |
| const GSUB_ChainContextSubstFormat1 *ccsf1; |
| int offset; |
| int dirLookahead = write_dir; |
| int dirBacktrack = -1 * write_dir; |
| |
| offset = GET_BE_WORD(look->SubTable[j]); |
| ccsf1 = (const GSUB_ChainContextSubstFormat1*)((const BYTE*)look+offset); |
| if (GET_BE_WORD(ccsf1->SubstFormat) == 1) |
| { |
| FIXME(" TODO: subtype 1 (Simple context glyph substitution)\n"); |
| return -1; |
| } |
| else if (GET_BE_WORD(ccsf1->SubstFormat) == 2) |
| { |
| FIXME(" TODO: subtype 2 (Class-based Chaining Context Glyph Substitution)\n"); |
| return -1; |
| } |
| else if (GET_BE_WORD(ccsf1->SubstFormat) == 3) |
| { |
| int k; |
| int indexGlyphs; |
| const GSUB_ChainContextSubstFormat3_1 *ccsf3_1; |
| const GSUB_ChainContextSubstFormat3_2 *ccsf3_2; |
| const GSUB_ChainContextSubstFormat3_3 *ccsf3_3; |
| const GSUB_ChainContextSubstFormat3_4 *ccsf3_4; |
| int newIndex = glyph_index; |
| |
| ccsf3_1 = (const GSUB_ChainContextSubstFormat3_1 *)ccsf1; |
| |
| TRACE(" subtype 3 (Coverage-based Chaining Context Glyph Substitution)\n"); |
| |
| for (k = 0; k < GET_BE_WORD(ccsf3_1->BacktrackGlyphCount); k++) |
| { |
| offset = GET_BE_WORD(ccsf3_1->Coverage[k]); |
| if (GSUB_is_glyph_covered((const BYTE*)ccsf3_1+offset, glyphs[glyph_index + (dirBacktrack * (k+1))]) == -1) |
| break; |
| } |
| if (k != GET_BE_WORD(ccsf3_1->BacktrackGlyphCount)) |
| return -1; |
| TRACE("Matched Backtrack\n"); |
| |
| ccsf3_2 = (const GSUB_ChainContextSubstFormat3_2 *)(((LPBYTE)ccsf1)+sizeof(GSUB_ChainContextSubstFormat3_1) + (sizeof(WORD) * (GET_BE_WORD(ccsf3_1->BacktrackGlyphCount)-1))); |
| |
| indexGlyphs = GET_BE_WORD(ccsf3_2->InputGlyphCount); |
| for (k = 0; k < indexGlyphs; k++) |
| { |
| offset = GET_BE_WORD(ccsf3_2->Coverage[k]); |
| if (GSUB_is_glyph_covered((const BYTE*)ccsf3_1+offset, glyphs[glyph_index + (write_dir * k)]) == -1) |
| break; |
| } |
| if (k != indexGlyphs) |
| return -1; |
| TRACE("Matched IndexGlyphs\n"); |
| |
| ccsf3_3 = (const GSUB_ChainContextSubstFormat3_3 *)(((LPBYTE)ccsf3_2)+sizeof(GSUB_ChainContextSubstFormat3_2) + (sizeof(WORD) * (GET_BE_WORD(ccsf3_2->InputGlyphCount)-1))); |
| |
| for (k = 0; k < GET_BE_WORD(ccsf3_3->LookaheadGlyphCount); k++) |
| { |
| offset = GET_BE_WORD(ccsf3_3->Coverage[k]); |
| if (GSUB_is_glyph_covered((const BYTE*)ccsf3_1+offset, glyphs[glyph_index + (dirLookahead * (indexGlyphs + k+1))]) == -1) |
| break; |
| } |
| if (k != GET_BE_WORD(ccsf3_3->LookaheadGlyphCount)) |
| return -1; |
| TRACE("Matched LookAhead\n"); |
| |
| ccsf3_4 = (const GSUB_ChainContextSubstFormat3_4 *)(((LPBYTE)ccsf3_3)+sizeof(GSUB_ChainContextSubstFormat3_3) + (sizeof(WORD) * (GET_BE_WORD(ccsf3_3->LookaheadGlyphCount)-1))); |
| |
| for (k = 0; k < GET_BE_WORD(ccsf3_4->SubstCount); k++) |
| { |
| int lookupIndex = GET_BE_WORD(ccsf3_4->SubstLookupRecord[k].LookupListIndex); |
| int SequenceIndex = GET_BE_WORD(ccsf3_4->SubstLookupRecord[k].SequenceIndex) * write_dir; |
| |
| TRACE("SUBST: %i -> %i %i\n",k, SequenceIndex, lookupIndex); |
| newIndex = GSUB_apply_lookup(lookup, lookupIndex, glyphs, glyph_index + SequenceIndex, write_dir, glyph_count); |
| if (newIndex == -1) |
| { |
| ERR("Chain failed to generate a glyph\n"); |
| return -1; |
| } |
| } |
| return newIndex + 1; |
| } |
| } |
| return -1; |
| } |
| |
| static INT GSUB_apply_lookup(const GSUB_LookupList* lookup, INT lookup_index, WORD *glyphs, INT glyph_index, INT write_dir, INT *glyph_count) |
| { |
| int offset; |
| const GSUB_LookupTable *look; |
| |
| offset = GET_BE_WORD(lookup->Lookup[lookup_index]); |
| look = (const GSUB_LookupTable*)((const BYTE*)lookup + offset); |
| TRACE("type %i, flag %x, subtables %i\n",GET_BE_WORD(look->LookupType),GET_BE_WORD(look->LookupFlag),GET_BE_WORD(look->SubTableCount)); |
| switch(GET_BE_WORD(look->LookupType)) |
| { |
| case 1: |
| return GSUB_apply_SingleSubst(look, glyphs, glyph_index, write_dir, glyph_count); |
| case 3: |
| return GSUB_apply_AlternateSubst(look, glyphs, glyph_index, write_dir, glyph_count); |
| case 4: |
| return GSUB_apply_LigatureSubst(look, glyphs, glyph_index, write_dir, glyph_count); |
| case 6: |
| return GSUB_apply_ChainContextSubst(lookup, look, glyphs, glyph_index, write_dir, glyph_count); |
| default: |
| FIXME("We do not handle SubType %i\n",GET_BE_WORD(look->LookupType)); |
| } |
| return GSUB_E_NOGLYPH; |
| } |
| |
| static INT GSUB_apply_feature(const GSUB_Header * header, const GSUB_Feature* feature, WORD *glyphs, INT glyph_index, INT write_dir, INT *glyph_count) |
| { |
| int i; |
| int out_index = GSUB_E_NOGLYPH; |
| const GSUB_LookupList *lookup; |
| |
| lookup = (const GSUB_LookupList*)((const BYTE*)header + GET_BE_WORD(header->LookupList)); |
| |
| TRACE("%i lookups\n", GET_BE_WORD(feature->LookupCount)); |
| for (i = 0; i < GET_BE_WORD(feature->LookupCount); i++) |
| { |
| out_index = GSUB_apply_lookup(lookup, GET_BE_WORD(feature->LookupListIndex[i]), glyphs, glyph_index, write_dir, glyph_count); |
| if (out_index != GSUB_E_NOGLYPH) |
| break; |
| } |
| if (out_index == GSUB_E_NOGLYPH) |
| TRACE("lookups found no glyphs\n"); |
| return out_index; |
| } |
| |
| static const char* get_opentype_script(HDC hdc, SCRIPT_ANALYSIS *psa) |
| { |
| UINT charset; |
| |
| if (ShapingData[psa->eScript].otTag[0] != 0) |
| return ShapingData[psa->eScript].otTag; |
| |
| /* |
| * fall back to the font charset |
| */ |
| charset = GetTextCharsetInfo(hdc, NULL, 0x0); |
| switch (charset) |
| { |
| case ANSI_CHARSET: return "latn"; |
| case BALTIC_CHARSET: return "latn"; /* ?? */ |
| case CHINESEBIG5_CHARSET: return "hani"; |
| case EASTEUROPE_CHARSET: return "latn"; /* ?? */ |
| case GB2312_CHARSET: return "hani"; |
| case GREEK_CHARSET: return "grek"; |
| case HANGUL_CHARSET: return "hang"; |
| case RUSSIAN_CHARSET: return "cyrl"; |
| case SHIFTJIS_CHARSET: return "kana"; |
| case TURKISH_CHARSET: return "latn"; /* ?? */ |
| case VIETNAMESE_CHARSET: return "latn"; |
| case JOHAB_CHARSET: return "latn"; /* ?? */ |
| case ARABIC_CHARSET: return "arab"; |
| case HEBREW_CHARSET: return "hebr"; |
| case THAI_CHARSET: return "thai"; |
| default: return "latn"; |
| } |
| } |
| |
| static LPCVOID load_GSUB_feature(HDC hdc, SCRIPT_ANALYSIS *psa, ScriptCache *psc, const char* feat) |
| { |
| const GSUB_Feature *feature; |
| int i; |
| |
| for (i = 0; i < psc->feature_count; i++) |
| if (strncmp(psc->features[i].tag,feat,4)==0) |
| return psc->features[i].feature; |
| |
| feature = NULL; |
| |
| if (psc->GSUB_Table) |
| { |
| const GSUB_Script *script; |
| const GSUB_LangSys *language; |
| |
| script = GSUB_get_script_table(psc->GSUB_Table, get_opentype_script(hdc,psa)); |
| if (script) |
| { |
| language = GSUB_get_lang_table(script, "xxxx"); /* Need to get Lang tag */ |
| if (language) |
| feature = GSUB_get_feature(psc->GSUB_Table, language, feat); |
| } |
| |
| /* try in the default (latin) table */ |
| if (!feature) |
| { |
| script = GSUB_get_script_table(psc->GSUB_Table, "latn"); |
| if (script) |
| { |
| language = GSUB_get_lang_table(script, "xxxx"); /* Need to get Lang tag */ |
| if (language) |
| feature = GSUB_get_feature(psc->GSUB_Table, language, feat); |
| } |
| } |
| } |
| |
| TRACE("Feature %s located at %p\n",debugstr_an(feat,4),feature); |
| |
| psc->feature_count++; |
| |
| if (psc->features) |
| psc->features = HeapReAlloc(GetProcessHeap(), 0, psc->features, psc->feature_count * sizeof(LoadedFeature)); |
| else |
| psc->features = HeapAlloc(GetProcessHeap(), 0, psc->feature_count * sizeof(LoadedFeature)); |
| |
| lstrcpynA(psc->features[psc->feature_count - 1].tag, feat, 5); |
| psc->features[psc->feature_count - 1].feature = feature; |
| return feature; |
| } |
| |
| static INT apply_GSUB_feature_to_glyph(HDC hdc, SCRIPT_ANALYSIS *psa, ScriptCache* psc, WORD *glyphs, INT index, INT write_dir, INT* glyph_count, const char* feat) |
| { |
| const GSUB_Feature *feature; |
| |
| feature = load_GSUB_feature(hdc, psa, psc, feat); |
| if (!feature) |
| return GSUB_E_NOFEATURE; |
| |
| TRACE("applying feature %s\n",feat); |
| return GSUB_apply_feature(psc->GSUB_Table, feature, glyphs, index, write_dir, glyph_count); |
| } |
| |
| static VOID *load_gsub_table(HDC hdc) |
| { |
| VOID* GSUB_Table = NULL; |
| int length = GetFontData(hdc, GSUB_TAG , 0, NULL, 0); |
| if (length != GDI_ERROR) |
| { |
| GSUB_Table = HeapAlloc(GetProcessHeap(),0,length); |
| GetFontData(hdc, GSUB_TAG , 0, GSUB_Table, length); |
| TRACE("Loaded GSUB table of %i bytes\n",length); |
| } |
| return GSUB_Table; |
| } |
| |
| static void UpdateClusters(int nextIndex, int changeCount, int write_dir, int chars, WORD* pwLogClust ) |
| { |
| if (changeCount == 0) |
| return; |
| else |
| { |
| int i; |
| int target_glyph = nextIndex - 1; |
| int target_index = -1; |
| int replacing_glyph = -1; |
| int changed = 0; |
| |
| if (write_dir > 0) |
| for (i = 0; i < chars; i++) |
| { |
| if (pwLogClust[i] == target_glyph) |
| { |
| target_index = i; |
| break; |
| } |
| } |
| else |
| for (i = chars - 1; i >= 0; i--) |
| { |
| if (pwLogClust[i] == target_glyph) |
| { |
| target_index = i; |
| break; |
| } |
| } |
| if (target_index == -1) |
| { |
| ERR("Unable to find target glyph\n"); |
| return; |
| } |
| |
| if (changeCount < 0) |
| { |
| /* merge glyphs */ |
| for(i = target_index; i < chars && i >= 0; i+=write_dir) |
| { |
| if (pwLogClust[i] == target_glyph) |
| continue; |
| if(pwLogClust[i] == replacing_glyph) |
| pwLogClust[i] = target_glyph; |
| else |
| { |
| changed--; |
| if (changed >= changeCount) |
| { |
| replacing_glyph = pwLogClust[i]; |
| pwLogClust[i] = target_glyph; |
| } |
| else |
| break; |
| } |
| } |
| } |
| |
| /* renumber trailing indexes*/ |
| for(i = target_index; i < chars && i >= 0; i+=write_dir) |
| { |
| if (pwLogClust[i] != target_glyph) |
| pwLogClust[i] += changeCount; |
| } |
| } |
| } |
| |
| static int apply_GSUB_feature(HDC hdc, SCRIPT_ANALYSIS *psa, ScriptCache* psc, WORD *pwOutGlyphs, int write_dir, INT* pcGlyphs, INT cChars, const char* feat, WORD *pwLogClust ) |
| { |
| int i; |
| |
| if (psc->GSUB_Table) |
| { |
| const GSUB_Feature *feature; |
| |
| feature = load_GSUB_feature(hdc, psa, psc, feat); |
| if (!feature) |
| return GSUB_E_NOFEATURE; |
| |
| i = 0; |
| TRACE("applying feature %s\n",debugstr_an(feat,4)); |
| while(i < *pcGlyphs) |
| { |
| INT nextIndex; |
| INT prevCount = *pcGlyphs; |
| nextIndex = GSUB_apply_feature(psc->GSUB_Table, feature, pwOutGlyphs, i, write_dir, pcGlyphs); |
| if (nextIndex > GSUB_E_NOGLYPH) |
| { |
| UpdateClusters(nextIndex, *pcGlyphs - prevCount, write_dir, cChars, pwLogClust); |
| i = nextIndex; |
| } |
| else |
| i++; |
| } |
| return *pcGlyphs; |
| } |
| return GSUB_E_NOFEATURE; |
| } |
| |
| static WCHAR neighbour_char(int i, int delta, const WCHAR* chars, INT cchLen) |
| { |
| if (i + delta < 0) |
| return 0; |
| if ( i+ delta >= cchLen) |
| return 0; |
| |
| i += delta; |
| |
| return chars[i]; |
| } |
| |
| static CHAR neighbour_joining_type(int i, int delta, const CHAR* context_type, INT cchLen, SCRIPT_ANALYSIS *psa) |
| { |
| if (i + delta < 0) |
| { |
| if (psa->fLinkBefore) |
| return jtR; |
| else |
| return jtU; |
| } |
| if ( i+ delta >= cchLen) |
| { |
| if (psa->fLinkAfter) |
| return jtL; |
| else |
| return jtU; |
| } |
| |
| i += delta; |
| |
| if (context_type[i] == jtT) |
| return neighbour_joining_type(i,delta,context_type,cchLen,psa); |
| else |
| return context_type[i]; |
| } |
| |
| static inline BOOL right_join_causing(CHAR joining_type) |
| { |
| return (joining_type == jtL || joining_type == jtD || joining_type == jtC); |
| } |
| |
| static inline BOOL left_join_causing(CHAR joining_type) |
| { |
| return (joining_type == jtR || joining_type == jtD || joining_type == jtC); |
| } |
| |
| static inline BOOL word_break_causing(WCHAR chr) |
| { |
| /* we are working within a string of characters already guareented to |
| be within one script, Syriac, so we do not worry about any characers |
| other than the space character outside of that range */ |
| return (chr == 0 || chr == 0x20 ); |
| } |
| |
| /* |
| * ContextualShape_Arabic |
| */ |
| static void ContextualShape_Arabic(HDC hdc, ScriptCache *psc, SCRIPT_ANALYSIS *psa, WCHAR* pwcChars, INT cChars, WORD* pwOutGlyphs, INT* pcGlyphs, INT cMaxGlyphs, WORD *pwLogClust) |
| { |
| CHAR *context_type; |
| INT *context_shape; |
| INT dirR, dirL; |
| int i; |
| |
| if (*pcGlyphs != cChars) |
| { |
| ERR("Number of Glyphs and Chars need to match at the beginning\n"); |
| return; |
| } |
| |
| if (!psa->fLogicalOrder && psa->fRTL) |
| { |
| dirR = 1; |
| dirL = -1; |
| } |
| else |
| { |
| dirR = -1; |
| dirL = 1; |
| } |
| |
| if (!psc->GSUB_Table) |
| psc->GSUB_Table = load_gsub_table(hdc); |
| |
| context_type = HeapAlloc(GetProcessHeap(),0,cChars); |
| context_shape = HeapAlloc(GetProcessHeap(),0,sizeof(INT) * cChars); |
| |
| for (i = 0; i < cChars; i++) |
| context_type[i] = wine_shaping_table[wine_shaping_table[pwcChars[i] >> 8] + (pwcChars[i] & 0xff)]; |
| |
| for (i = 0; i < cChars; i++) |
| { |
| if (context_type[i] == jtR && right_join_causing(neighbour_joining_type(i,dirR,context_type,cChars,psa))) |
| context_shape[i] = Xr; |
| else if (context_type[i] == jtL && left_join_causing(neighbour_joining_type(i,dirL,context_type,cChars,psa))) |
| context_shape[i] = Xl; |
| else if (context_type[i] == jtD && left_join_causing(neighbour_joining_type(i,dirL,context_type,cChars,psa)) && right_join_causing(neighbour_joining_type(i,dirR,context_type,cChars,psa))) |
| context_shape[i] = Xm; |
| else if (context_type[i] == jtD && right_join_causing(neighbour_joining_type(i,dirR,context_type,cChars,psa))) |
| context_shape[i] = Xr; |
| else if (context_type[i] == jtD && left_join_causing(neighbour_joining_type(i,dirL,context_type,cChars,psa))) |
| context_shape[i] = Xl; |
| else |
| context_shape[i] = Xn; |
| } |
| |
| /* Contextual Shaping */ |
| i = 0; |
| while(i < *pcGlyphs) |
| { |
| BOOL shaped = FALSE; |
| |
| if (psc->GSUB_Table) |
| { |
| INT nextIndex; |
| INT prevCount = *pcGlyphs; |
| nextIndex = apply_GSUB_feature_to_glyph(hdc, psa, psc, pwOutGlyphs, i, dirL, pcGlyphs, contextual_features[context_shape[i]]); |
| if (nextIndex > GSUB_E_NOGLYPH) |
| { |
| i = nextIndex; |
| UpdateClusters(nextIndex, *pcGlyphs - prevCount, dirL, cChars, pwLogClust); |
| } |
| shaped = (nextIndex > GSUB_E_NOGLYPH); |
| } |
| |
| if (!shaped) |
| { |
| WORD newGlyph = pwOutGlyphs[i]; |
| if (pwcChars[i] >= FIRST_ARABIC_CHAR && pwcChars[i] <= LAST_ARABIC_CHAR) |
| { |
| /* fall back to presentation form B */ |
| WCHAR context_char = wine_shaping_forms[pwcChars[i] - FIRST_ARABIC_CHAR][context_shape[i]]; |
| if (context_char != pwcChars[i] && GetGlyphIndicesW(hdc, &context_char, 1, &newGlyph, 0) != GDI_ERROR && newGlyph != 0x0000) |
| pwOutGlyphs[i] = newGlyph; |
| } |
| i++; |
| } |
| } |
| |
| HeapFree(GetProcessHeap(),0,context_shape); |
| HeapFree(GetProcessHeap(),0,context_type); |
| } |
| |
| /* |
| * ContextualShape_Syriac |
| */ |
| |
| #define ALAPH 0x710 |
| #define DALATH 0x715 |
| #define RISH 0x72A |
| |
| static void ContextualShape_Syriac(HDC hdc, ScriptCache *psc, SCRIPT_ANALYSIS *psa, WCHAR* pwcChars, INT cChars, WORD* pwOutGlyphs, INT* pcGlyphs, INT cMaxGlyphs, WORD *pwLogClust) |
| { |
| CHAR *context_type; |
| INT *context_shape; |
| INT dirR, dirL; |
| int i; |
| |
| if (*pcGlyphs != cChars) |
| { |
| ERR("Number of Glyphs and Chars need to match at the beginning\n"); |
| return; |
| } |
| |
| if (!psa->fLogicalOrder && psa->fRTL) |
| { |
| dirR = 1; |
| dirL = -1; |
| } |
| else |
| { |
| dirR = -1; |
| dirL = 1; |
| } |
| |
| if (!psc->GSUB_Table) |
| psc->GSUB_Table = load_gsub_table(hdc); |
| |
| if (!psc->GSUB_Table) |
| return; |
| |
| context_type = HeapAlloc(GetProcessHeap(),0,cChars); |
| context_shape = HeapAlloc(GetProcessHeap(),0,sizeof(INT) * cChars); |
| |
| for (i = 0; i < cChars; i++) |
| context_type[i] = wine_shaping_table[wine_shaping_table[pwcChars[i] >> 8] + (pwcChars[i] & 0xff)]; |
| |
| for (i = 0; i < cChars; i++) |
| { |
| if (pwcChars[i] == ALAPH) |
| { |
| WCHAR rchar = neighbour_char(i,dirR,pwcChars,cChars); |
| |
| if (left_join_causing(neighbour_joining_type(i,dirR,context_type,cChars,psa)) && word_break_causing(neighbour_char(i,dirL,pwcChars,cChars))) |
| context_shape[i] = Afj; |
| else if ( rchar != DALATH && rchar != RISH && |
| !left_join_causing(neighbour_joining_type(i,dirR,context_type,cChars,psa)) && |
| word_break_causing(neighbour_char(i,dirL,pwcChars,cChars))) |
| context_shape[i] = Afn; |
| else if ( (rchar == DALATH || rchar == RISH) && word_break_causing(neighbour_char(i,dirL,pwcChars,cChars))) |
| context_shape[i] = Afx; |
| } |
| else if (context_type[i] == jtR && |
| right_join_causing(neighbour_joining_type(i,dirR,context_type,cChars,psa))) |
| context_shape[i] = Xr; |
| else if (context_type[i] == jtL && left_join_causing(neighbour_joining_type(i,dirL,context_type,cChars,psa))) |
| context_shape[i] = Xl; |
| else if (context_type[i] == jtD && left_join_causing(neighbour_joining_type(i,dirL,context_type,cChars,psa)) && right_join_causing(neighbour_joining_type(i,dirR,context_type,cChars,psa))) |
| context_shape[i] = Xm; |
| else if (context_type[i] == jtD && right_join_causing(neighbour_joining_type(i,dirR,context_type,cChars,psa))) |
| context_shape[i] = Xr; |
| else if (context_type[i] == jtD && left_join_causing(neighbour_joining_type(i,dirL,context_type,cChars,psa))) |
| context_shape[i] = Xl; |
| else |
| context_shape[i] = Xn; |
| } |
| |
| /* Contextual Shaping */ |
| i = 0; |
| while(i < *pcGlyphs) |
| { |
| INT nextIndex; |
| INT prevCount = *pcGlyphs; |
| nextIndex = apply_GSUB_feature_to_glyph(hdc, psa, psc, pwOutGlyphs, i, dirL, pcGlyphs, contextual_features[context_shape[i]]); |
| if (nextIndex > GSUB_E_NOGLYPH) |
| { |
| UpdateClusters(nextIndex, *pcGlyphs - prevCount, dirL, cChars, pwLogClust); |
| i = nextIndex; |
| } |
| } |
| |
| HeapFree(GetProcessHeap(),0,context_shape); |
| HeapFree(GetProcessHeap(),0,context_type); |
| } |
| |
| /* |
| * ContextualShape_Phags_pa |
| */ |
| |
| #define phags_pa_CANDRABINDU 0xA873 |
| #define phags_pa_START 0xA840 |
| #define phags_pa_END 0xA87F |
| |
| static void ContextualShape_Phags_pa(HDC hdc, ScriptCache *psc, SCRIPT_ANALYSIS *psa, WCHAR* pwcChars, INT cChars, WORD* pwOutGlyphs, INT* pcGlyphs, INT cMaxGlyphs, WORD *pwLogClust) |
| { |
| INT *context_shape; |
| INT dirR, dirL; |
| int i; |
| |
| if (*pcGlyphs != cChars) |
| { |
| ERR("Number of Glyphs and Chars need to match at the beginning\n"); |
| return; |
| } |
| |
| if (!psa->fLogicalOrder && psa->fRTL) |
| { |
| dirR = 1; |
| dirL = -1; |
| } |
| else |
| { |
| dirR = -1; |
| dirL = 1; |
| } |
| |
| if (!psc->GSUB_Table) |
| psc->GSUB_Table = load_gsub_table(hdc); |
| |
| if (!psc->GSUB_Table) |
| return; |
| |
| context_shape = HeapAlloc(GetProcessHeap(),0,sizeof(INT) * cChars); |
| |
| for (i = 0; i < cChars; i++) |
| { |
| if (pwcChars[i] >= phags_pa_START && pwcChars[i] <= phags_pa_END) |
| { |
| WCHAR rchar = neighbour_char(i,dirR,pwcChars,cChars); |
| WCHAR lchar = neighbour_char(i,dirL,pwcChars,cChars); |
| BOOL jrchar = (rchar != phags_pa_CANDRABINDU && rchar >= phags_pa_START && rchar <= phags_pa_END); |
| BOOL jlchar = (lchar != phags_pa_CANDRABINDU && lchar >= phags_pa_START && lchar <= phags_pa_END); |
| |
| if (jrchar && jlchar) |
| context_shape[i] = Xm; |
| else if (jrchar) |
| context_shape[i] = Xr; |
| else if (jlchar) |
| context_shape[i] = Xl; |
| else |
| context_shape[i] = Xn; |
| } |
| else |
| context_shape[i] = -1; |
| } |
| |
| /* Contextual Shaping */ |
| i = 0; |
| while(i < *pcGlyphs) |
| { |
| if (context_shape[i] >= 0) |
| { |
| INT nextIndex; |
| INT prevCount = *pcGlyphs; |
| nextIndex = apply_GSUB_feature_to_glyph(hdc, psa, psc, pwOutGlyphs, i, dirL, pcGlyphs, contextual_features[context_shape[i]]); |
| if (nextIndex > GSUB_E_NOGLYPH) |
| { |
| UpdateClusters(nextIndex, *pcGlyphs - prevCount, dirL, cChars, pwLogClust); |
| i = nextIndex; |
| } |
| else |
| i++; |
| } |
| else |
| i++; |
| } |
| |
| HeapFree(GetProcessHeap(),0,context_shape); |
| } |
| |
| void SHAPE_ContextualShaping(HDC hdc, ScriptCache *psc, SCRIPT_ANALYSIS *psa, WCHAR* pwcChars, INT cChars, WORD* pwOutGlyphs, INT* pcGlyphs, INT cMaxGlyphs, WORD *pwLogClust) |
| { |
| if (ShapingData[psa->eScript].contextProc) |
| ShapingData[psa->eScript].contextProc(hdc, psc, psa, pwcChars, cChars, pwOutGlyphs, pcGlyphs, cMaxGlyphs, pwLogClust); |
| } |
| |
| static void SHAPE_ApplyOpenTypeFeatures(HDC hdc, ScriptCache *psc, SCRIPT_ANALYSIS *psa, WORD* pwOutGlyphs, INT* pcGlyphs, INT cMaxGlyphs, INT cChars, const TEXTRANGE_PROPERTIES *rpRangeProperties, WORD *pwLogClust) |
| { |
| int i; |
| INT dirL; |
| |
| if (!rpRangeProperties) |
| return; |
| |
| if (!psc->GSUB_Table) |
| psc->GSUB_Table = load_gsub_table(hdc); |
| |
| if (!psc->GSUB_Table) |
| return; |
| |
| if (!psa->fLogicalOrder && psa->fRTL) |
| dirL = -1; |
| else |
| dirL = 1; |
| |
| for (i = 0; i < rpRangeProperties->cotfRecords; i++) |
| { |
| if (rpRangeProperties->potfRecords[i].lParameter > 0) |
| apply_GSUB_feature(hdc, psa, psc, pwOutGlyphs, dirL, pcGlyphs, cChars, (const char*)&rpRangeProperties->potfRecords[i].tagFeature, pwLogClust); |
| } |
| } |
| |
| void SHAPE_ApplyDefaultOpentypeFeatures(HDC hdc, ScriptCache *psc, SCRIPT_ANALYSIS *psa, WORD* pwOutGlyphs, INT* pcGlyphs, INT cMaxGlyphs, INT cChars, WORD *pwLogClust) |
| { |
| const TEXTRANGE_PROPERTIES *rpRangeProperties; |
| rpRangeProperties = &ShapingData[psa->eScript].defaultTextRange; |
| |
| SHAPE_ApplyOpenTypeFeatures(hdc, psc, psa, pwOutGlyphs, pcGlyphs, cMaxGlyphs, cChars, rpRangeProperties, pwLogClust); |
| } |
| |
| HRESULT SHAPE_CheckFontForRequiredFeatures(HDC hdc, ScriptCache *psc, SCRIPT_ANALYSIS *psa) |
| { |
| const GSUB_Feature *feature; |
| int i; |
| |
| if (!ShapingData[psa->eScript].requiredFeatures) |
| return S_OK; |
| |
| if (!psc->GSUB_Table) |
| psc->GSUB_Table = load_gsub_table(hdc); |
| |
| /* we need to have at least one of the required features */ |
| i = 0; |
| while (ShapingData[psa->eScript].requiredFeatures[i]) |
| { |
| feature = load_GSUB_feature(hdc, psa, psc, ShapingData[psa->eScript].requiredFeatures[i]); |
| if (feature) |
| return S_OK; |
| i++; |
| } |
| |
| return USP_E_SCRIPT_NOT_IN_FONT; |
| } |
