dll/win32/usp10/usp10_internal.h

   1 /*
   2  * Implementation of Uniscribe Script Processor (usp10.dll)
   3  *
   4  * Copyright 2010 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 #define MS_MAKE_TAG( _x1, _x2, _x3, _x4 ) \
  22           ( ( (ULONG)_x4 << 24 ) |     \
  23             ( (ULONG)_x3 << 16 ) |     \
  24             ( (ULONG)_x2 <<  8 ) |     \
  25               (ULONG)_x1         )
  26
  27
  28 #define Script_Latin   1
  29 #define Script_CR      2
  30 #define Script_Numeric 3
  31 #define Script_Control 4
  32 #define Script_Punctuation 5
  33 #define Script_Arabic  6
  34 #define Script_Arabic_Numeric  7
  35 #define Script_Hebrew  8
  36 #define Script_Syriac  9
  37 #define Script_Persian 10
  38 #define Script_Thaana  11
  39 #define Script_Greek   12
  40 #define Script_Cyrillic   13
  41 #define Script_Armenian 14
  42 #define Script_Georgian 15
  43 /* Unicode Chapter 10 */
  44 #define Script_Sinhala 16
  45 #define Script_Tibetan 17
  46 #define Script_Tibetan_Numeric 18
  47 #define Script_Phags_pa 19
  48 /* Unicode Chapter 11 */
  49 #define Script_Thai 20
  50 #define Script_Thai_Numeric 21
  51 #define Script_Lao 22
  52 #define Script_Lao_Numeric 23
  53 /* Unicode Chapter 9 */
  54 #define Script_Devanagari 24
  55 #define Script_Devanagari_Numeric 25
  56 #define Script_Bengali 26
  57 #define Script_Bengali_Numeric 27
  58 #define Script_Bengali_Currency 28
  59 #define Script_Gurmukhi 29
  60 #define Script_Gurmukhi_Numeric 30
  61 #define Script_Gujarati 31
  62 #define Script_Gujarati_Numeric 32
  63 #define Script_Gujarati_Currency 33
  64 #define Script_Oriya 34
  65 #define Script_Oriya_Numeric 35
  66 #define Script_Tamil 36
  67 #define Script_Tamil_Numeric 37
  68 #define Script_Telugu 38
  69 #define Script_Telugu_Numeric 39
  70 #define Script_Kannada 40
  71 #define Script_Kannada_Numeric 41
  72 #define Script_Malayalam 42
  73 #define Script_Malayalam_Numeric 43
  74 /* More supplemental */
  75 #define Script_Diacritical 44
  76 #define Script_Punctuation2 45
  77 #define Script_Numeric2 46
  78 /* Unicode Chapter 11 continued */
  79 #define Script_Myanmar 47
  80 #define Script_Myanmar_Numeric 48
  81 #define Script_Tai_Le 49
  82 #define Script_New_Tai_Lue 50
  83 #define Script_New_Tai_Lue_Numeric 51
  84 #define Script_Khmer 52
  85 #define Script_Khmer_Numeric 53
  86 /* Unicode Chapter 12 */
  87 #define Script_CJK_Han  54
  88 #define Script_Ideograph  55
  89 #define Script_Bopomofo 56
  90 #define Script_Kana 57
  91 #define Script_Hangul 58
  92 #define Script_Yi 59
  93 /* Unicode Chapter 13 */
  94 #define Script_Ethiopic 60
  95 #define Script_Ethiopic_Numeric 61
  96 #define Script_Mongolian 62
  97 #define Script_Mongolian_Numeric 63
  98 #define Script_Tifinagh 64
  99 #define Script_NKo 65
 100 #define Script_Vai 66
 101 #define Script_Vai_Numeric 67
 102 #define Script_Cherokee 68
 103 #define Script_Canadian 69
 104 /* Unicode Chapter 14 */
 105 #define Script_Ogham 70
 106 #define Script_Runic 71
 107 /* Unicode Chapter 15 */
 108 #define Script_Braille 72
 109 /* Unicode Chapter 16 */
 110 #define Script_Surrogates 73
 111 #define Script_Private 74
 112 /* Unicode Chapter 13 : Plane 1 */
 113 #define Script_Deseret 75
 114 #define Script_Osmanya 76
 115 #define Script_Osmanya_Numeric 77
 116 /* Unicode Chapter 15 : Plane 1 */
 117 #define Script_MathAlpha 78
 118 /* Additional Currency Scripts */
 119 #define Script_Hebrew_Currency 79
 120 #define Script_Vietnamese_Currency 80
 121 #define Script_Thai_Currency 81
 122
 123 #define GLYPH_BLOCK_SHIFT 8
 124 #define GLYPH_BLOCK_SIZE  (1UL << GLYPH_BLOCK_SHIFT)
 125 #define GLYPH_BLOCK_MASK  (GLYPH_BLOCK_SIZE - 1)
 126 #define GLYPH_MAX         65536
 127
 128 #define GSUB_E_NOFEATURE -2
 129 #define GSUB_E_NOGLYPH -1
 130
 131 #define FEATURE_ALL_TABLES 0
 132 #define FEATURE_GSUB_TABLE 1
 133 #define FEATURE_GPOS_TABLE 2
 134
 135 typedef struct {
 136     OPENTYPE_TAG tag;
 137     CHAR tableType;
 138     LPCVOID  feature;
 139     INT lookup_count;
 140     WORD *lookups;
 141 } LoadedFeature;
 142
 143 typedef struct {
 144     OPENTYPE_TAG tag;
 145     LPCVOID gsub_table;
 146     LPCVOID gpos_table;
 147     BOOL features_initialized;
 148     INT feature_count;
 149     LoadedFeature *features;
 150 } LoadedLanguage;
 151
 152 typedef struct {
 153     OPENTYPE_TAG tag;
 154     LPCVOID gsub_table;
 155     LPCVOID gpos_table;
 156     LoadedLanguage default_language;
 157     BOOL languages_initialized;
 158     INT language_count;
 159     LoadedLanguage *languages;
 160 } LoadedScript;
 161
 162 typedef struct {
 163     WORD *glyphs[GLYPH_MAX / GLYPH_BLOCK_SIZE];
 164 } CacheGlyphPage;
 165
 166 typedef struct {
 167     LOGFONTW lf;
 168     TEXTMETRICW tm;
 169     OUTLINETEXTMETRICW *otm;
 170     SCRIPT_FONTPROPERTIES sfp;
 171     BOOL sfnt;
 172     CacheGlyphPage *page[0x10];
 173     ABC *widths[GLYPH_MAX / GLYPH_BLOCK_SIZE];
 174     LPVOID GSUB_Table;
 175     LPVOID GDEF_Table;
 176     LPVOID CMAP_Table;
 177     LPVOID CMAP_format12_Table;
 178     LPVOID GPOS_Table;
 179     BOOL scripts_initialized;
 180     INT script_count;
 181     LoadedScript *scripts;
 182
 183     OPENTYPE_TAG userScript;
 184     OPENTYPE_TAG userLang;
 185 } ScriptCache;
 186
 187 typedef struct _scriptData
 188 {
 189     SCRIPT_ANALYSIS a;
 190     SCRIPT_PROPERTIES props;
 191     OPENTYPE_TAG scriptTag;
 192     WCHAR fallbackFont[LF_FACESIZE];
 193 } scriptData;
 194
 195 typedef struct {
 196     INT start;
 197     INT base;
 198     INT ralf;
 199     INT blwf;
 200     INT pref;
 201     INT end;
 202 } IndicSyllable;
 203
 204 enum {lex_Halant, lex_Composed_Vowel, lex_Matra_post, lex_Matra_pre, lex_Matra_above, lex_Matra_below, lex_ZWJ, lex_ZWNJ, lex_NBSP, lex_Modifier, lex_Vowel, lex_Consonant, lex_Generic, lex_Ra, lex_Vedic, lex_Anudatta, lex_Nukta};
 205
 206 static inline BOOL is_consonant( int type )
 207 {
 208     return (type == lex_Ra || type == lex_Consonant);
 209 }
 210
 211 static inline WCHAR get_table_entry( const unsigned short *table, WCHAR ch )
 212 {
 213     return table[table[table[ch >> 8] + ((ch >> 4) & 0x0f)] + (ch & 0xf)];
 214 }
 215
 216 typedef int (*lexical_function)(WCHAR c);
 217 typedef void (*reorder_function)(LPWSTR pwChar, IndicSyllable *syllable, lexical_function lex);
 218
 219 #define odd(x) ((x) & 1)
 220 #define BIDI_STRONG  1
 221 #define BIDI_WEAK    2
 222 #define BIDI_NEUTRAL 0
 223
 224 int USP10_FindGlyphInLogClust(const WORD* pwLogClust, int cChars, WORD target) DECLSPEC_HIDDEN;
 225
 226 BOOL BIDI_DetermineLevels( LPCWSTR lpString, INT uCount, const SCRIPT_STATE *s,
 227                 const SCRIPT_CONTROL *c, WORD *lpOutLevels ) DECLSPEC_HIDDEN;
 228 BOOL BIDI_GetStrengths(LPCWSTR lpString, INT uCount, const SCRIPT_CONTROL *c,
 229                       WORD* lpStrength) DECLSPEC_HIDDEN;
 230 INT BIDI_ReorderV2lLevel(int level, int *pIndexs, const BYTE* plevel, int cch, BOOL fReverse) DECLSPEC_HIDDEN;
 231 INT BIDI_ReorderL2vLevel(int level, int *pIndexs, const BYTE* plevel, int cch, BOOL fReverse) DECLSPEC_HIDDEN;
 232 void SHAPE_ContextualShaping(HDC hdc, ScriptCache *psc, SCRIPT_ANALYSIS *psa, WCHAR* pwcChars, INT cChars, WORD* pwOutGlyphs, INT* pcGlyphs, INT cMaxGlyphs, WORD *pwLogClust) DECLSPEC_HIDDEN;
 233 void SHAPE_ApplyDefaultOpentypeFeatures(HDC hdc, ScriptCache *psc, SCRIPT_ANALYSIS *psa, WORD* pwOutGlyphs, INT* pcGlyphs, INT cMaxGlyphs, INT cChars, WORD *pwLogClust) DECLSPEC_HIDDEN;
 234 void SHAPE_ApplyOpenTypePositions(HDC hdc, ScriptCache *psc, SCRIPT_ANALYSIS *psa, const WORD* pwGlyphs, INT cGlyphs, int *piAdvance, GOFFSET *pGoffset ) DECLSPEC_HIDDEN;
 235 HRESULT SHAPE_CheckFontForRequiredFeatures(HDC hdc, ScriptCache *psc, SCRIPT_ANALYSIS *psa) DECLSPEC_HIDDEN;
 236 void SHAPE_CharGlyphProp(HDC hdc, ScriptCache *psc, SCRIPT_ANALYSIS *psa, const WCHAR* pwcChars, const INT cChars, const WORD* pwGlyphs, const INT cGlyphs, WORD *pwLogClust, SCRIPT_CHARPROP *pCharProp, SCRIPT_GLYPHPROP *pGlyphProp) DECLSPEC_HIDDEN;
 237 INT SHAPE_does_GSUB_feature_apply_to_chars(HDC hdc, SCRIPT_ANALYSIS *psa, ScriptCache* psc, const WCHAR *chars, INT write_dir, INT count, const char* feature) DECLSPEC_HIDDEN;
 238 HRESULT SHAPE_GetFontScriptTags( HDC hdc, ScriptCache *psc, SCRIPT_ANALYSIS *psa, int cMaxTags, OPENTYPE_TAG *pScriptTags, int *pcTags) DECLSPEC_HIDDEN;
 239 HRESULT SHAPE_GetFontLanguageTags( HDC hdc, ScriptCache *psc, SCRIPT_ANALYSIS *psa, OPENTYPE_TAG tagScript, int cMaxTags, OPENTYPE_TAG *pLangSysTags, int *pcTags) DECLSPEC_HIDDEN;
 240 HRESULT SHAPE_GetFontFeatureTags( HDC hdc, ScriptCache *psc, SCRIPT_ANALYSIS *psa, OPENTYPE_TAG tagScript, OPENTYPE_TAG tagLangSys, int cMaxTags, OPENTYPE_TAG *pFeatureTags, int *pcTags) DECLSPEC_HIDDEN;
 241
 242 void Indic_ReorderCharacters( HDC hdc, SCRIPT_ANALYSIS *psa, ScriptCache* psc, LPWSTR input, int cChars, IndicSyllable **syllables, int *syllable_count, lexical_function lexical_f, reorder_function reorder_f, BOOL modern) DECLSPEC_HIDDEN;
 243 void Indic_ParseSyllables( HDC hdc, SCRIPT_ANALYSIS *psa, ScriptCache* psc, LPCWSTR input, const int cChar, IndicSyllable **syllables, int *syllable_count, lexical_function lex, BOOL modern) DECLSPEC_HIDDEN;
 244
 245 void BREAK_line(const WCHAR *chars, int count, const SCRIPT_ANALYSIS *sa, SCRIPT_LOGATTR *la) DECLSPEC_HIDDEN;
 246
 247 DWORD OpenType_CMAP_GetGlyphIndex(HDC hdc, ScriptCache *psc, DWORD utf32c, LPWORD pgi, DWORD flags) DECLSPEC_HIDDEN;
 248 void OpenType_GDEF_UpdateGlyphProps(ScriptCache *psc, const WORD *pwGlyphs, const WORD cGlyphs, WORD* pwLogClust, const WORD cChars, SCRIPT_GLYPHPROP *pGlyphProp) DECLSPEC_HIDDEN;
 249 INT OpenType_apply_GSUB_lookup(LPCVOID table, INT lookup_index, WORD *glyphs, INT glyph_index, INT write_dir, INT *glyph_count) DECLSPEC_HIDDEN;
 250 INT OpenType_apply_GPOS_lookup(ScriptCache *psc, LPOUTLINETEXTMETRICW lpotm, LPLOGFONTW lplogfont, const SCRIPT_ANALYSIS *analysis, INT* piAdvance, INT lookup_index, const WORD *glyphs, INT glyph_index, INT glyph_count, GOFFSET *pGoffset) DECLSPEC_HIDDEN;
 251 HRESULT OpenType_GetFontScriptTags(ScriptCache *psc, OPENTYPE_TAG searchingFor, int cMaxTags, OPENTYPE_TAG *pScriptTags, int *pcTags) DECLSPEC_HIDDEN;
 252 HRESULT OpenType_GetFontLanguageTags(ScriptCache *psc, OPENTYPE_TAG script_tag, OPENTYPE_TAG searchingFor, int cMaxTags, OPENTYPE_TAG *pLanguageTags, int *pcTags) DECLSPEC_HIDDEN;
 253 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) DECLSPEC_HIDDEN;