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
  79 #define GLYPH_BLOCK_SHIFT 8
  80 #define GLYPH_BLOCK_SIZE  (1UL << GLYPH_BLOCK_SHIFT)
  81 #define GLYPH_BLOCK_MASK  (GLYPH_BLOCK_SIZE - 1)
  82 #define GLYPH_MAX         65536
  83
  84 typedef struct {
  85     char    tag[5];
  86     char    script[5];
  87     LPCVOID  feature;
  88 } LoadedFeature;
  89
  90 typedef struct {
  91     LOGFONTW lf;
  92     TEXTMETRICW tm;
  93     BOOL sfnt;
  94     WORD *glyphs[GLYPH_MAX / GLYPH_BLOCK_SIZE];
  95     ABC *widths[GLYPH_MAX / GLYPH_BLOCK_SIZE];
  96     LPVOID GSUB_Table;
  97     LPVOID GDEF_Table;
  98     INT feature_count;
  99     LoadedFeature *features;
 100
 101     OPENTYPE_TAG userScript;
 102     OPENTYPE_TAG userLang;
 103 } ScriptCache;
 104
 105 typedef struct {
 106     INT start;
 107     INT base;
 108     INT ralf;
 109     INT blwf;
 110     INT pref;
 111     INT end;
 112 } IndicSyllable;
 113
 114 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};
 115
 116 static inline BOOL is_consonant( int type )
 117 {
 118     return (type == lex_Ra || type == lex_Consonant);
 119 }
 120
 121 static inline WCHAR get_table_entry( const unsigned short *table, WCHAR ch )
 122 {
 123     return table[table[table[ch >> 8] + ((ch >> 4) & 0x0f)] + (ch & 0xf)];
 124 }
 125
 126 typedef int (*lexical_function)(WCHAR c);
 127 typedef void (*reorder_function)(LPWSTR pwChar, IndicSyllable *syllable, lexical_function lex);
 128
 129 #define odd(x) ((x) & 1)
 130 #define BIDI_STRONG  1
 131 #define BIDI_WEAK    2
 132 #define BIDI_NEUTRAL 0
 133
 134 BOOL BIDI_DetermineLevels( LPCWSTR lpString, INT uCount, const SCRIPT_STATE *s,
 135                 const SCRIPT_CONTROL *c, WORD *lpOutLevels ) DECLSPEC_HIDDEN;
 136 BOOL BIDI_GetStrengths(LPCWSTR lpString, INT uCount, const SCRIPT_CONTROL *c,
 137                       WORD* lpStrength) DECLSPEC_HIDDEN;
 138 INT BIDI_ReorderV2lLevel(int level, int *pIndexs, const BYTE* plevel, int cch, BOOL fReverse) DECLSPEC_HIDDEN;
 139 INT BIDI_ReorderL2vLevel(int level, int *pIndexs, const BYTE* plevel, int cch, BOOL fReverse) DECLSPEC_HIDDEN;
 140 void SHAPE_ContextualShaping(HDC hdc, ScriptCache *psc, SCRIPT_ANALYSIS *psa, WCHAR* pwcChars, INT cChars, WORD* pwOutGlyphs, INT* pcGlyphs, INT cMaxGlyphs, WORD *pwLogClust) DECLSPEC_HIDDEN;
 141 void SHAPE_ApplyDefaultOpentypeFeatures(HDC hdc, ScriptCache *psc, SCRIPT_ANALYSIS *psa, WORD* pwOutGlyphs, INT* pcGlyphs, INT cMaxGlyphs, INT cChars, WORD *pwLogClust) DECLSPEC_HIDDEN;
 142 HRESULT SHAPE_CheckFontForRequiredFeatures(HDC hdc, ScriptCache *psc, SCRIPT_ANALYSIS *psa) DECLSPEC_HIDDEN;
 143 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;
 144 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;
 145
 146 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;
 147 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);
 148
 149 void BREAK_line(const WCHAR *chars, int count, const SCRIPT_ANALYSIS *sa, SCRIPT_LOGATTR *la) DECLSPEC_HIDDEN;