1 /* 2 * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies) 3 * 4 * This is part of HarfBuzz, an OpenType Layout engine library. 5 * 6 * Permission is hereby granted, without written agreement and without 7 * license or royalty fees, to use, copy, modify, and distribute this 8 * software and its documentation for any purpose, provided that the 9 * above copyright notice and the following two paragraphs appear in 10 * all copies of this software. 11 * 12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR 13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES 14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN 15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH 16 * DAMAGE. 17 * 18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, 19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS 21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO 22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. 23 */ 24 25 #ifndef HARFBUZZ_SHAPER_PRIVATE_H 26 #define HARFBUZZ_SHAPER_PRIVATE_H 27 28 HB_BEGIN_HEADER 29 30 enum { 31 C_DOTTED_CIRCLE = 0x25CC 32 }; 33 34 typedef enum 35 { 36 HB_Combining_BelowLeftAttached = 200, 37 HB_Combining_BelowAttached = 202, 38 HB_Combining_BelowRightAttached = 204, 39 HB_Combining_LeftAttached = 208, 40 HB_Combining_RightAttached = 210, 41 HB_Combining_AboveLeftAttached = 212, 42 HB_Combining_AboveAttached = 214, 43 HB_Combining_AboveRightAttached = 216, 44 45 HB_Combining_BelowLeft = 218, 46 HB_Combining_Below = 220, 47 HB_Combining_BelowRight = 222, 48 HB_Combining_Left = 224, 49 HB_Combining_Right = 226, 50 HB_Combining_AboveLeft = 228, 51 HB_Combining_Above = 230, 52 HB_Combining_AboveRight = 232, 53 54 HB_Combining_DoubleBelow = 233, 55 HB_Combining_DoubleAbove = 234, 56 HB_Combining_IotaSubscript = 240 57 } HB_CombiningClass; 58 59 typedef enum { 60 CcmpProperty = 0x1, 61 InitProperty = 0x2, 62 IsolProperty = 0x4, 63 FinaProperty = 0x8, 64 MediProperty = 0x10, 65 RligProperty = 0x20, 66 CaltProperty = 0x40, 67 LigaProperty = 0x80, 68 DligProperty = 0x100, 69 CswhProperty = 0x200, 70 MsetProperty = 0x400, 71 72 /* used by indic and myanmar shaper */ 73 NuktaProperty = 0x4, 74 AkhantProperty = 0x8, 75 RephProperty = 0x10, 76 PreFormProperty = 0x20, 77 BelowFormProperty = 0x40, 78 AboveFormProperty = 0x80, 79 HalfFormProperty = 0x100, 80 PostFormProperty = 0x200, 81 VattuProperty = 0x400, 82 PreSubstProperty = 0x800, 83 BelowSubstProperty = 0x1000, 84 AboveSubstProperty = 0x2000, 85 PostSubstProperty = 0x4000, 86 HalantProperty = 0x8000, 87 CligProperty = 0x10000 88 89 } HB_OpenTypeProperty; 90 91 /* return true if ok. */ 92 typedef HB_Bool (*HB_ShapeFunction)(HB_ShaperItem *shaper_item); 93 typedef void (*HB_AttributeFunction)(HB_Script script, const HB_UChar16 *string, hb_uint32 from, hb_uint32 len, HB_CharAttributes *attributes); 94 95 typedef struct { 96 HB_ShapeFunction shape; 97 HB_AttributeFunction charAttributes; 98 } HB_ScriptEngine; 99 100 extern const HB_ScriptEngine hb_scriptEngines[]; 101 102 extern HB_Bool HB_BasicShape(HB_ShaperItem *shaper_item); 103 extern HB_Bool HB_TibetanShape(HB_ShaperItem *shaper_item); 104 extern HB_Bool HB_HebrewShape(HB_ShaperItem *shaper_item); 105 extern HB_Bool HB_ArabicShape(HB_ShaperItem *shaper_item); 106 extern HB_Bool HB_HangulShape(HB_ShaperItem *shaper_item); 107 extern HB_Bool HB_MyanmarShape(HB_ShaperItem *shaper_item); 108 extern HB_Bool HB_KhmerShape(HB_ShaperItem *shaper_item); 109 extern HB_Bool HB_IndicShape(HB_ShaperItem *shaper_item); 110 111 extern void HB_TibetanAttributes(HB_Script script, const HB_UChar16 *string, hb_uint32 from, hb_uint32 len, HB_CharAttributes *attributes); 112 113 extern void HB_MyanmarAttributes(HB_Script script, const HB_UChar16 *string, hb_uint32 from, hb_uint32 len, HB_CharAttributes *attributes); 114 115 extern void HB_KhmerAttributes(HB_Script script, const HB_UChar16 *string, hb_uint32 from, hb_uint32 len, HB_CharAttributes *attributes); 116 117 extern void HB_IndicAttributes(HB_Script script, const HB_UChar16 *string, hb_uint32 from, hb_uint32 len, HB_CharAttributes *attributes); 118 119 extern void HB_ThaiAttributes(HB_Script script, const HB_UChar16 *string, hb_uint32 from, hb_uint32 len, HB_CharAttributes *attributes); 120 121 typedef struct { 122 hb_uint32 tag; 123 hb_uint32 property; 124 } HB_OpenTypeFeature; 125 126 #define PositioningProperties 0x80000000 127 128 HB_Bool HB_SelectScript(HB_ShaperItem *item, const HB_OpenTypeFeature *features); 129 130 HB_Bool HB_OpenTypeShape(HB_ShaperItem *item, const hb_uint32 *properties); 131 HB_Bool HB_OpenTypePosition(HB_ShaperItem *item, int availableGlyphs, HB_Bool doLogClusters); 132 133 void HB_HeuristicPosition(HB_ShaperItem *item); 134 void HB_HeuristicSetGlyphAttributes(HB_ShaperItem *item); 135 136 #define HB_IsControlChar(uc) \ 137 ((uc >= 0x200b && uc <= 0x200f /* ZW Space, ZWNJ, ZWJ, LRM and RLM */) \ 138 || (uc >= 0x2028 && uc <= 0x202f /* LS, PS, LRE, RLE, PDF, LRO, RLO, NNBSP */) \ 139 || (uc >= 0x206a && uc <= 0x206f /* ISS, ASS, IAFS, AFS, NADS, NODS */)) 140 141 HB_Bool HB_ConvertStringToGlyphIndices(HB_ShaperItem *shaper_item); 142 143 #define HB_GetGlyphAdvances(shaper_item) \ 144 shaper_item->font->klass->getGlyphAdvances(shaper_item->font, \ 145 shaper_item->glyphs, shaper_item->num_glyphs, \ 146 shaper_item->advances, \ 147 shaper_item->face->current_flags); 148 149 #define HB_DECLARE_STACKARRAY(Type, Name) \ 150 Type stack##Name[512]; \ 151 Type *Name = stack##Name; 152 153 #define HB_INIT_STACKARRAY(Type, Name, Length) \ 154 if ((Length) >= 512) \ 155 Name = (Type *)malloc((Length) * sizeof(Type)); 156 157 #define HB_STACKARRAY(Type, Name, Length) \ 158 HB_DECLARE_STACKARRAY(Type, Name) \ 159 HB_INIT_STACKARRAY(Type, Name, Length) 160 161 #define HB_FREE_STACKARRAY(Name) \ 162 if (stack##Name != Name) \ 163 free(Name); 164 165 HB_END_HEADER 166 167 #endif 168
