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/*******************************************************************
*
* 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
HB_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, hb_uint32 from, hb_uint32 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, hb_uint32 from, hb_uint32 len, HB_CharAttributes *attributes);
extern void HB_MyanmarAttributes(HB_Script script, const HB_UChar16 *string, hb_uint32 from, hb_uint32 len, HB_CharAttributes *attributes);
extern void HB_KhmerAttributes(HB_Script script, const HB_UChar16 *string, hb_uint32 from, hb_uint32 len, HB_CharAttributes *attributes);
extern void HB_IndicAttributes(HB_Script script, const HB_UChar16 *string, hb_uint32 from, hb_uint32 len, HB_CharAttributes *attributes);
typedef struct {
hb_uint32 tag;
hb_uint32 property;
} HB_OpenTypeFeature;
#define PositioningProperties 0x80000000
HB_Bool HB_SelectScript(HB_ShaperItem *item, const HB_OpenTypeFeature *features);
HB_Bool HB_OpenTypeShape(HB_ShaperItem *item, const hb_uint32 *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);
#define HB_IsControlChar(uc) \
((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 */))
HB_Bool HB_StringToGlyphs(HB_ShaperItem *shaper_item);
#define HB_GetAdvances(shaper_item) \
shaper_item->font->klass->getAdvances(shaper_item->font, \
shaper_item->glyphs, shaper_item->num_glyphs, \
shaper_item->advances, \
shaper_item->face->current_flags);
#define HB_DECLARE_STACKARRAY(Type, Name) \
Type stack##Name[512]; \
Type *Name = stack##Name;
#define HB_INIT_STACKARRAY(Type, Name, Length) \
if ((Length) >= 512) \
Name = (Type *)malloc((Length) * sizeof(Type));
#define HB_STACKARRAY(Type, Name, Length) \
HB_DECLARE_STACKARRAY(Type, Name) \
HB_INIT_STACKARRAY(Type, Name, Length)
#define HB_FREE_STACKARRAY(Name) \
if (stack##Name != Name) \
free(Name);
HB_END_HEADER
#endif
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