harfbuzz-gpos-private.h

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				      /* array of LigatureAttach tables  */
};

typedef struct HB_LigatureArray_  HB_LigatureArray;


struct  HB_MarkLigPos_
{
  HB_UShort          PosFormat;       /* always 1                      */
  HB_Coverage       MarkCoverage;    /* mark glyph coverage table     */
  HB_Coverage       LigatureCoverage;
				      /* ligature glyph coverage table */
  HB_UShort          ClassCount;      /* number of mark classes        */
  HB_MarkArray      MarkArray;       /* mark array table              */
  HB_LigatureArray  LigatureArray;   /* ligature array table          */
};

typedef struct HB_MarkLigPos_  HB_MarkLigPos;


/* LookupType 6 */

struct  HB_Mark2Record_
{
  HB_Anchor*  Mark2Anchor;           /* array of mark glyph anchor
					 tables                     */
};

typedef struct HB_Mark2Record_  HB_Mark2Record;


struct  HB_Mark2Array_
{
  HB_UShort         Mark2Count;       /* number of Mark2Record tables */
  HB_Mark2Record*  Mark2Record;      /* array of Mark2Record tables  */
};

typedef struct HB_Mark2Array_  HB_Mark2Array;


struct  HB_MarkMarkPos_
{
  HB_UShort       PosFormat;          /* always 1                         */
  HB_Coverage    Mark1Coverage;      /* first mark glyph coverage table  */
  HB_Coverage    Mark2Coverage;      /* second mark glyph coverave table */
  HB_UShort       ClassCount;         /* number of combining mark classes */
  HB_MarkArray   Mark1Array;         /* MarkArray table for first mark   */
  HB_Mark2Array  Mark2Array;         /* MarkArray table for second mark  */
};

typedef struct HB_MarkMarkPos_  HB_MarkMarkPos;


/* needed by both lookup type 7 and 8 */

struct  HB_PosLookupRecord_
{
  HB_UShort  SequenceIndex;           /* index into current
					 glyph sequence               */
  HB_UShort  LookupListIndex;         /* Lookup to apply to that pos. */
};

typedef struct HB_PosLookupRecord_  HB_PosLookupRecord;


/* LookupType 7 */

struct  HB_PosRule_
{
  HB_UShort             GlyphCount;   /* total number of input glyphs     */
  HB_UShort             PosCount;     /* number of PosLookupRecord tables */
  HB_UShort*            Input;        /* array of input glyph IDs         */
  HB_PosLookupRecord*  PosLookupRecord;
				      /* array of PosLookupRecord tables  */
};

typedef struct HB_PosRule_  HB_PosRule;


struct  HB_PosRuleSet_
{
  HB_UShort     PosRuleCount;         /* number of PosRule tables */
  HB_PosRule*  PosRule;              /* array of PosRule tables  */
};

typedef struct HB_PosRuleSet_  HB_PosRuleSet;


struct  HB_ContextPosFormat1_
{
  HB_Coverage     Coverage;          /* Coverage table              */
  HB_UShort        PosRuleSetCount;   /* number of PosRuleSet tables */
  HB_PosRuleSet*  PosRuleSet;        /* array of PosRuleSet tables  */
};

typedef struct HB_ContextPosFormat1_  HB_ContextPosFormat1;


struct  HB_PosClassRule_
{
  HB_UShort             GlyphCount;   /* total number of context classes  */
  HB_UShort             PosCount;     /* number of PosLookupRecord tables */
  HB_UShort*            Class;        /* array of classes                 */
  HB_PosLookupRecord*  PosLookupRecord;
				      /* array of PosLookupRecord tables  */
};

typedef struct HB_PosClassRule_  HB_PosClassRule;


struct  HB_PosClassSet_
{
  HB_UShort          PosClassRuleCount;
				      /* number of PosClassRule tables */
  HB_PosClassRule*  PosClassRule;    /* array of PosClassRule tables  */
};

typedef struct HB_PosClassSet_  HB_PosClassSet;


/* The `MaxContextLength' field is not defined in the TTO specification
   but simplifies the implementation of this format.  It holds the
   maximal context length used in the context rules.                    */

struct  HB_ContextPosFormat2_
{
  HB_UShort            MaxContextLength;
				      /* maximal context length       */
  HB_Coverage         Coverage;      /* Coverage table               */
  HB_ClassDefinition  ClassDef;      /* ClassDef table               */
  HB_UShort            PosClassSetCount;
				      /* number of PosClassSet tables */
  HB_PosClassSet*     PosClassSet;   /* array of PosClassSet tables  */
};

typedef struct HB_ContextPosFormat2_  HB_ContextPosFormat2;


struct  HB_ContextPosFormat3_
{
  HB_UShort             GlyphCount;   /* number of input glyphs           */
  HB_UShort             PosCount;     /* number of PosLookupRecord tables */
  HB_Coverage*         Coverage;     /* array of Coverage tables         */
  HB_PosLookupRecord*  PosLookupRecord;
				      /* array of PosLookupRecord tables  */
};

typedef struct HB_ContextPosFormat3_  HB_ContextPosFormat3;


struct  HB_ContextPos_
{
  HB_UShort  PosFormat;               /* 1, 2, or 3     */

  union
  {
    HB_ContextPosFormat1  cpf1;
    HB_ContextPosFormat2  cpf2;
    HB_ContextPosFormat3  cpf3;
  } cpf;
};

typedef struct HB_ContextPos_  HB_ContextPos;


/* LookupType 8 */

struct  HB_ChainPosRule_
{
  HB_UShort             BacktrackGlyphCount;
				      /* total number of backtrack glyphs */
  HB_UShort*            Backtrack;    /* array of backtrack glyph IDs     */
  HB_UShort             InputGlyphCount;
				      /* total number of input glyphs     */
  HB_UShort*            Input;        /* array of input glyph IDs         */
  HB_UShort             LookaheadGlyphCount;
				      /* total number of lookahead glyphs */
  HB_UShort*            Lookahead;    /* array of lookahead glyph IDs     */
  HB_UShort             PosCount;     /* number of PosLookupRecords       */
  HB_PosLookupRecord*  PosLookupRecord;
				      /* array of PosLookupRecords       */
};

typedef struct HB_ChainPosRule_  HB_ChainPosRule;


struct  HB_ChainPosRuleSet_
{
  HB_UShort          ChainPosRuleCount;
				      /* number of ChainPosRule tables */
  HB_ChainPosRule*  ChainPosRule;    /* array of ChainPosRule tables  */
};

typedef struct HB_ChainPosRuleSet_  HB_ChainPosRuleSet;


struct  HB_ChainContextPosFormat1_
{
  HB_Coverage          Coverage;     /* Coverage table                   */
  HB_UShort             ChainPosRuleSetCount;
				      /* number of ChainPosRuleSet tables */
  HB_ChainPosRuleSet*  ChainPosRuleSet;
				      /* array of ChainPosRuleSet tables  */
};

typedef struct HB_ChainContextPosFormat1_  HB_ChainContextPosFormat1;


struct  HB_ChainPosClassRule_
{
  HB_UShort             BacktrackGlyphCount;
				      /* total number of backtrack
					 classes                         */
  HB_UShort*            Backtrack;    /* array of backtrack classes      */
  HB_UShort             InputGlyphCount;
				      /* total number of context classes */
  HB_UShort*            Input;        /* array of context classes        */
  HB_UShort             LookaheadGlyphCount;
				      /* total number of lookahead
					 classes                         */
  HB_UShort*            Lookahead;    /* array of lookahead classes      */
  HB_UShort             PosCount;     /* number of PosLookupRecords      */
  HB_PosLookupRecord*  PosLookupRecord;
				      /* array of substitution lookups   */
};

typedef struct HB_ChainPosClassRule_  HB_ChainPosClassRule;


struct  HB_ChainPosClassSet_
{
  HB_UShort               ChainPosClassRuleCount;
				      /* number of ChainPosClassRule
					 tables                      */
  HB_ChainPosClassRule*  ChainPosClassRule;
				      /* array of ChainPosClassRule
					 tables                      */
};

typedef struct HB_ChainPosClassSet_  HB_ChainPosClassSet;


/* The `MaxXXXLength' fields are not defined in the TTO specification
   but simplifies the implementation of this format.  It holds the
   maximal context length used in the specific context rules.         */

struct  HB_ChainContextPosFormat2_
{
  HB_Coverage           Coverage;    /* Coverage table             */

  HB_UShort              MaxBacktrackLength;
				      /* maximal backtrack length   */
  HB_ClassDefinition    BacktrackClassDef;
				      /* BacktrackClassDef table    */
  HB_UShort              MaxInputLength;
				      /* maximal input length       */
  HB_ClassDefinition    InputClassDef;
				      /* InputClassDef table        */
  HB_UShort              MaxLookaheadLength;
				      /* maximal lookahead length   */
  HB_ClassDefinition    LookaheadClassDef;
				      /* LookaheadClassDef table    */

  HB_UShort              ChainPosClassSetCount;
				      /* number of ChainPosClassSet
					 tables                     */
  HB_ChainPosClassSet*  ChainPosClassSet;
				      /* array of ChainPosClassSet
					 tables                     */
};

typedef struct HB_ChainContextPosFormat2_  HB_ChainContextPosFormat2;


struct  HB_ChainContextPosFormat3_
{
  HB_UShort             BacktrackGlyphCount;
				      /* number of backtrack glyphs    */
  HB_Coverage*         BacktrackCoverage;
				      /* array of backtrack Coverage
					 tables                        */
  HB_UShort             InputGlyphCount;
				      /* number of input glyphs        */
  HB_Coverage*         InputCoverage;
				      /* array of input coverage
					 tables                        */
  HB_UShort             LookaheadGlyphCount;
				      /* number of lookahead glyphs    */
  HB_Coverage*         LookaheadCoverage;
				      /* array of lookahead coverage
					 tables                        */
  HB_UShort             PosCount;     /* number of PosLookupRecords    */
  HB_PosLookupRecord*  PosLookupRecord;
				      /* array of substitution lookups */
};

typedef struct HB_ChainContextPosFormat3_  HB_ChainContextPosFormat3;


struct  HB_ChainContextPos_
{
  HB_UShort  PosFormat;             /* 1, 2, or 3 */

  union
  {
    HB_ChainContextPosFormat1  ccpf1;
    HB_ChainContextPosFormat2  ccpf2;
    HB_ChainContextPosFormat3  ccpf3;
  } ccpf;
};

typedef struct HB_ChainContextPos_  HB_ChainContextPos;


#if 0
/* LookupType 10 */
struct HB_ExtensionPos_
{
  HB_UShort      PosFormat;           /* always 1 */
  HB_UShort      LookuptType;         /* lookup-type of referenced subtable */
  HB_GPOS_SubTable *subtable;         /* referenced subtable */
};

typedef struct HB_ExtensionPos_  HB_ExtensionPos;
#endif


union  HB_GPOS_SubTable_
{
  HB_SinglePos        single;
  HB_PairPos          pair;
  HB_CursivePos       cursive;
  HB_MarkBasePos      markbase;
  HB_MarkLigPos       marklig;
  HB_MarkMarkPos      markmark;
  HB_ContextPos       context;
  HB_ChainContextPos  chain;
};

typedef union HB_GPOS_SubTable_  HB_GPOS_SubTable;



HB_INTERNAL HB_Error
_HB_GPOS_Load_SubTable( HB_GPOS_SubTable* st,
			HB_Stream         stream,
			HB_UShort         lookup_type );

HB_INTERNAL void
_HB_GPOS_Free_SubTable( HB_GPOS_SubTable* st,
		        HB_UShort         lookup_type );

HB_END_HEADER

#endif /* HARFBUZZ_GPOS_PRIVATE_H */