1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
/*******************************************************************
*
* Copyright 2007 Trolltech ASA
*
* This is part of HarfBuzz, an OpenType Layout engine library.
*
* See the file name COPYING for licensing information.
*
******************************************************************/
#ifndef HARFBUZZ_SHAPER_PRIVATE_H
#define HARFBUZZ_SHAPER_PRIVATE_H
FT_BEGIN_HEADER
enum {
C_DOTTED_CIRCLE = 0x25CC
};
typedef enum
{
HB_Combining_BelowLeftAttached = 200,
HB_Combining_BelowAttached = 202,
HB_Combining_BelowRightAttached = 204,
HB_Combining_LeftAttached = 208,
HB_Combining_RightAttached = 210,
HB_Combining_AboveLeftAttached = 212,
HB_Combining_AboveAttached = 214,
HB_Combining_AboveRightAttached = 216,
HB_Combining_BelowLeft = 218,
HB_Combining_Below = 220,
HB_Combining_BelowRight = 222,
HB_Combining_Left = 224,
HB_Combining_Right = 226,
HB_Combining_AboveLeft = 228,
HB_Combining_Above = 230,
HB_Combining_AboveRight = 232,
HB_Combining_DoubleBelow = 233,
HB_Combining_DoubleAbove = 234,
HB_Combining_IotaSubscript = 240
} HB_CombiningClass;
typedef enum {
CcmpProperty = 0x1,
InitProperty = 0x2,
IsolProperty = 0x4,
FinaProperty = 0x8,
MediProperty = 0x10,
RligProperty = 0x20,
CaltProperty = 0x40,
LigaProperty = 0x80,
DligProperty = 0x100,
CswhProperty = 0x200,
MsetProperty = 0x400,
// used by indic and myanmar shaper
NuktaProperty = 0x4,
AkhantProperty = 0x8,
RephProperty = 0x10,
PreFormProperty = 0x20,
BelowFormProperty = 0x40,
AboveFormProperty = 0x80,
HalfFormProperty = 0x100,
PostFormProperty = 0x200,
VattuProperty = 0x400,
PreSubstProperty = 0x800,
BelowSubstProperty = 0x1000,
AboveSubstProperty = 0x2000,
PostSubstProperty = 0x4000,
HalantProperty = 0x8000,
CligProperty = 0x10000
} HB_OpenTypeProperty;
// return true if ok.
typedef HB_Bool (*HB_ShapeFunction)(HB_ShaperItem *shaper_item);
typedef void (*HB_AttributeFunction)(HB_Script script, const HB_UChar16 *string, uint32_t from, uint32_t len, HB_CharAttributes *attributes);
typedef struct {
HB_ShapeFunction shape;
HB_AttributeFunction charAttributes;
} HB_ScriptEngine;
extern const HB_ScriptEngine hb_scriptEngines[];
extern HB_Bool HB_BasicShape(HB_ShaperItem *shaper_item);
extern HB_Bool HB_TibetanShape(HB_ShaperItem *shaper_item);
extern HB_Bool HB_HebrewShape(HB_ShaperItem *shaper_item);
extern HB_Bool HB_ArabicShape(HB_ShaperItem *shaper_item);
extern HB_Bool HB_HangulShape(HB_ShaperItem *shaper_item);
extern HB_Bool HB_MyanmarShape(HB_ShaperItem *shaper_item);
extern HB_Bool HB_KhmerShape(HB_ShaperItem *shaper_item);
extern HB_Bool HB_IndicShape(HB_ShaperItem *shaper_item);
extern void HB_TibetanAttributes(HB_Script script, const HB_UChar16 *string, uint32_t from, uint32_t len, HB_CharAttributes *attributes);
extern void HB_MyanmarAttributes(HB_Script script, const HB_UChar16 *string, uint32_t from, uint32_t len, HB_CharAttributes *attributes);
extern void HB_KhmerAttributes(HB_Script script, const HB_UChar16 *string, uint32_t from, uint32_t len, HB_CharAttributes *attributes);
extern void HB_IndicAttributes(HB_Script script, const HB_UChar16 *string, uint32_t from, uint32_t len, HB_CharAttributes *attributes);
typedef struct {
uint32_t tag;
uint32_t property;
} HB_OpenTypeFeature;
enum { PositioningProperties = 0x80000000 };
HB_Bool HB_SelectScript(HB_ShaperItem *item, const HB_OpenTypeFeature *features);
HB_Bool HB_OpenTypeShape(HB_ShaperItem *item, const uint32_t *properties);
HB_Bool HB_OpenTypePosition(HB_ShaperItem *item, int availableGlyphs, HB_Bool doLogClusters);
void HB_HeuristicPosition(HB_ShaperItem *item);
void HB_HeuristicSetGlyphAttributes(HB_ShaperItem *item);
inline bool HB_IsControlChar(HB_UChar16 uc)
{
return (uc >= 0x200b && uc <= 0x200f /* ZW Space, ZWNJ, ZWJ, LRM and RLM */)
|| (uc >= 0x2028 && uc <= 0x202f /* LS, PS, LRE, RLE, PDF, LRO, RLO, NNBSP */)
|| (uc >= 0x206a && uc <= 0x206f /* ISS, ASS, IAFS, AFS, NADS, NODS */);
}
inline HB_Bool HB_StringToGlyphs(HB_ShaperItem *shaper_item)
{
return shaper_item->font->klass->stringToGlyphs(shaper_item->font,
shaper_item->string + shaper_item->item.pos, shaper_item->item.length,
shaper_item->glyphs, &shaper_item->num_glyphs,
shaper_item->item.bidiLevel % 2);
}
inline void HB_GetAdvances(HB_ShaperItem *shaper_item)
{
shaper_item->font->klass->getAdvances(shaper_item->font,
shaper_item->glyphs, shaper_item->num_glyphs,
shaper_item->advances);
}
#define HB_STACKARRAY(Type, Name, Length) \
Type stack##Name[512]; \
Type *Name = stack##Name; \
if ((Length) >= 512) \
Name = (Type *)malloc((Length) * sizeof(Type));
#define HB_FREE_STACKARRAY(Name) \
if (stack##Name != Name) \
free(Name);
FT_END_HEADER
#endif // HARFBUZZ_SHAPER_PRIVATE_H
|
