ftxgpos.h

神龙卡开发原代码

  };

  typedef struct TTO_LigatureArray_  TTO_LigatureArray;


  struct  TTO_MarkLigPos_
  {
    TT_UShort          PosFormat;       /* always 1                      */
    TTO_Coverage       MarkCoverage;    /* mark glyph coverage table     */
    TTO_Coverage       LigatureCoverage;
                                        /* ligature glyph coverage table */
    TT_UShort          ClassCount;      /* number of mark classes        */
    TTO_MarkArray      MarkArray;       /* mark array table              */
    TTO_LigatureArray  LigatureArray;   /* ligature array table          */
  };

  typedef struct TTO_MarkLigPos_  TTO_MarkLigPos;


  /* LookupType 6 */

  struct TTO_Mark2Record_
  {
    TTO_Anchor*  Mark2Anchor;           /* array of mark glyph anchor
                                           tables                     */
  };

  typedef struct TTO_Mark2Record_  TTO_Mark2Record;


  struct TTO_Mark2Array_
  {
    TT_UShort         Mark2Count;       /* number of Mark2Record tables */
    TTO_Mark2Record*  Mark2Record;      /* array of Mark2Record tables  */
  };

  typedef struct TTO_Mark2Array_  TTO_Mark2Array;


  struct TTO_MarkMarkPos_
  {
    TT_UShort       PosFormat;          /* always 1                         */
    TTO_Coverage    Mark1Coverage;      /* first mark glyph coverage table  */
    TTO_Coverage    Mark2Coverage;      /* second mark glyph coverave table */
    TT_UShort       ClassCount;         /* number of combining mark classes */
    TTO_MarkArray   Mark1Array;         /* MarkArray table for first mark   */
    TTO_Mark2Array  Mark2Array;         /* MarkArray table for second mark  */
  };

  typedef struct TTO_MarkMarkPos_  TTO_MarkMarkPos;


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

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

  typedef struct TTO_PosLookupRecord_  TTO_PosLookupRecord;


  /* LookupType 7 */

  struct  TTO_PosRule_
  {
    TT_UShort             GlyphCount;   /* total number of input glyphs     */
    TT_UShort             PosCount;     /* number of PosLookupRecord tables */
    TT_UShort*            Input;        /* array of input glyph IDs         */
    TTO_PosLookupRecord*  PosLookupRecord;
                                        /* array of PosLookupRecord tables  */
  };

  typedef struct TTO_PosRule_  TTO_PosRule;


  struct  TTO_PosRuleSet_
  {
    TT_UShort     PosRuleCount;         /* number of PosRule tables */
    TTO_PosRule*  PosRule;              /* array of PosRule tables  */
  };

  typedef struct TTO_PosRuleSet_  TTO_PosRuleSet;


  struct  TTO_ContextPosFormat1_
  {
    TTO_Coverage     Coverage;          /* Coverage table              */
    TT_UShort        PosRuleSetCount;   /* number of PosRuleSet tables */
    TTO_PosRuleSet*  PosRuleSet;        /* array of PosRuleSet tables  */
  };

  typedef struct TTO_ContextPosFormat1_  TTO_ContextPosFormat1;


  struct  TTO_PosClassRule_
  {
    TT_UShort             GlyphCount;   /* total number of context classes  */
    TT_UShort             PosCount;     /* number of PosLookupRecord tables */
    TT_UShort*            Class;        /* array of classes                 */
    TTO_PosLookupRecord*  PosLookupRecord;
                                        /* array of PosLookupRecord tables  */
  };

  typedef struct TTO_PosClassRule_  TTO_PosClassRule;


  struct  TTO_PosClassSet_
  {
    TT_UShort          PosClassRuleCount;
                                        /* number of PosClassRule tables */
    TTO_PosClassRule*  PosClassRule;    /* array of PosClassRule tables  */
  };

  typedef struct TTO_PosClassSet_  TTO_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  TTO_ContextPosFormat2_
  {
    TT_UShort            MaxContextLength;
                                        /* maximal context length       */
    TTO_Coverage         Coverage;      /* Coverage table               */
    TTO_ClassDefinition  ClassDef;      /* ClassDef table               */
    TT_UShort            PosClassSetCount;
                                        /* number of PosClassSet tables */
    TTO_PosClassSet*     PosClassSet;   /* array of PosClassSet tables  */
  };

  typedef struct TTO_ContextPosFormat2_  TTO_ContextPosFormat2;


  struct  TTO_ContextPosFormat3_
  {
    TT_UShort             GlyphCount;   /* number of input glyphs           */
    TT_UShort             PosCount;     /* number of PosLookupRecord tables */
    TTO_Coverage*         Coverage;     /* array of Coverage tables         */
    TTO_PosLookupRecord*  PosLookupRecord;
                                        /* array of PosLookupRecord tables  */
  };

  typedef struct TTO_ContextPosFormat3_  TTO_ContextPosFormat3;


  struct  TTO_ContextPos_
  {
    TT_UShort  PosFormat;               /* 1, 2, or 3     */

    union
    {
      TTO_ContextPosFormat1  cpf1;
      TTO_ContextPosFormat2  cpf2;
      TTO_ContextPosFormat3  cpf3;
    } cpf;
  };

  typedef struct TTO_ContextPos_  TTO_ContextPos;


  /* LookupType 8 */

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

  typedef struct TTO_ChainPosRule_  TTO_ChainPosRule;


  struct  TTO_ChainPosRuleSet_
  {
    TT_UShort          ChainPosRuleCount;
                                        /* number of ChainPosRule tables */
    TTO_ChainPosRule*  ChainPosRule;    /* array of ChainPosRule tables  */
  };

  typedef struct TTO_ChainPosRuleSet_  TTO_ChainPosRuleSet;


  struct  TTO_ChainContextPosFormat1_
  {
    TTO_Coverage          Coverage;     /* Coverage table                   */
    TT_UShort             ChainPosRuleSetCount;
                                        /* number of ChainPosRuleSet tables */
    TTO_ChainPosRuleSet*  ChainPosRuleSet;
                                        /* array of ChainPosRuleSet tables  */
  };

  typedef struct TTO_ChainContextPosFormat1_  TTO_ChainContextPosFormat1;


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

  typedef struct TTO_ChainPosClassRule_  TTO_ChainPosClassRule;


  struct  TTO_ChainPosClassSet_
  {
    TT_UShort               ChainPosClassRuleCount;
                                        /* number of ChainPosClassRule
                                           tables                      */
    TTO_ChainPosClassRule*  ChainPosClassRule;
                                        /* array of ChainPosClassRule
                                           tables                      */
  };

  typedef struct TTO_ChainPosClassSet_  TTO_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  TTO_ChainContextPosFormat2_
  {
    TTO_Coverage           Coverage;    /* Coverage table             */

    TT_UShort              MaxBacktrackLength;
                                        /* maximal backtrack length   */
    TTO_ClassDefinition    BacktrackClassDef;
                                        /* BacktrackClassDef table    */
    TT_UShort              MaxInputLength;
                                        /* maximal input length       */
    TTO_ClassDefinition    InputClassDef;
                                        /* InputClassDef table        */
    TT_UShort              MaxLookaheadLength;
                                        /* maximal lookahead length   */
    TTO_ClassDefinition    LookaheadClassDef;
                                        /* LookaheadClassDef table    */

    TT_UShort              ChainPosClassSetCount;
                                        /* number of ChainPosClassSet
                                           tables                     */
    TTO_ChainPosClassSet*  ChainPosClassSet;
                                        /* array of ChainPosClassSet
                                           tables                     */
  };

  typedef struct TTO_ChainContextPosFormat2_  TTO_ChainContextPosFormat2;


  struct  TTO_ChainContextPosFormat3_
  {
    TT_UShort             BacktrackGlyphCount;
                                        /* number of backtrack glyphs    */
    TTO_Coverage*         BacktrackCoverage;
                                        /* array of backtrack Coverage
                                           tables                        */
    TT_UShort             InputGlyphCount;
                                        /* number of input glyphs        */
    TTO_Coverage*         InputCoverage;
                                        /* array of input coverage
                                           tables                        */
    TT_UShort             LookaheadGlyphCount;
                                        /* number of lookahead glyphs    */
    TTO_Coverage*         LookaheadCoverage;
                                        /* array of lookahead coverage
                                           tables                        */
    TT_UShort             PosCount;     /* number of PosLookupRecords    */
    TTO_PosLookupRecord*  PosLookupRecord;
                                        /* array of substitution lookups */
  };

  typedef struct TTO_ChainContextPosFormat3_  TTO_ChainContextPosFormat3;


  struct  TTO_ChainContextPos_
  {
    TT_UShort  PosFormat;             /* 1, 2, or 3 */

    union
    {
      TTO_ChainContextPosFormat1  ccpf1;
      TTO_ChainContextPosFormat2  ccpf2;
      TTO_ChainContextPosFormat3  ccpf3;
    } ccpf;
  };

  typedef struct TTO_ChainContextPos_  TTO_ChainContextPos;


  union  TTO_GPOS_SubTable_
  {
    TTO_SinglePos        single;
    TTO_PairPos          pair;
    TTO_CursivePos       cursive;
    TTO_MarkBasePos      markbase;
    TTO_MarkLigPos       marklig;
    TTO_MarkMarkPos      markmark;
    TTO_ContextPos       context;
    TTO_ChainContextPos  chain;
  };

  typedef union TTO_GPOS_SubTable_  TTO_GPOS_SubTable;


  /* finally, the GPOS API */

  EXPORT_DEF
  TT_Error  TT_Init_GPOS_Extension( TT_Engine  engine );

  EXPORT_DEF
  TT_Error  TT_Load_GPOS_Table( TT_Face          face,
                                TTO_GPOSHeader*  gpos,
                                TTO_GDEFHeader*  gdef );

  EXPORT_DEF
  TT_Error  TT_GPOS_Select_Script( TTO_GPOSHeader*  gpos,
                                   TT_ULong         script_tag,
                                   TT_UShort*       script_index );
  EXPORT_DEF
  TT_Error  TT_GPOS_Select_Language( TTO_GPOSHeader*  gpos,
                                     TT_ULong         language_tag,
                                     TT_UShort        script_index,
                                     TT_UShort*       language_index,
                                     TT_UShort*       req_feature_index );
  EXPORT_DEF
  TT_Error  TT_GPOS_Select_Feature( TTO_GPOSHeader*  gpos,
                                    TT_ULong         feature_tag,
                                    TT_UShort        script_index,
                                    TT_UShort        language_index,
                                    TT_UShort*       feature_index );

  EXPORT_DEF
  TT_Error  TT_GPOS_Query_Scripts( TTO_GPOSHeader*  gpos,
                                   TT_ULong**       script_tag_list );
  EXPORT_DEF
  TT_Error  TT_GPOS_Query_Languages( TTO_GPOSHeader*  gpos,
                                     TT_UShort        script_index,
                                     TT_ULong**       language_tag_list );
  EXPORT_DEF
  TT_Error  TT_GPOS_Query_Features( TTO_GPOSHeader*  gpos,
                                    TT_UShort        script_index,
                                    TT_UShort        language_index,
                                    TT_ULong**       feature_tag_list );

  EXPORT_DEF
  TT_Error  TT_GPOS_Add_Feature( TTO_GPOSHeader*  gpos,
                                 TT_UShort        feature_index,
                                 TT_UShort        property );
  EXPORT_DEF
  TT_Error  TT_GPOS_Clear_Features( TTO_GPOSHeader*  gpos );

#ifdef __cplusplus
}
#endif

#endif /* FTXGPOS_H */


/* END */