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/*******************************************************************
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 *
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 *  ttcmap.h                                                    1.0
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 *
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 *    TrueType Character Mappings
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 *
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 *  Copyright 1996-1999 by
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 *  David Turner, Robert Wilhelm, and Werner Lemberg.
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 *
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 *  This file is part of the FreeType project, and may only be used
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 *  modified and distributed under the terms of the FreeType project
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 *  license, LICENSE.TXT.  By continuing to use, modify, or distribute
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 *  this file you indicate that you have read the license and
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 *  understand and accept it fully.
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 *
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 *
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 ******************************************************************/
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#ifndef TTCMAP_H
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#define TTCMAP_H
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#include "ttconfig.h"
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#include "tttypes.h"
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#ifdef __cplusplus
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  extern "C" {
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#endif
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  /* format 0 */
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  struct  TCMap0_
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  {
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    PByte  glyphIdArray;
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  };
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  typedef struct TCMap0_  TCMap0;
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  typedef TCMap0*         PCMap0;
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  /* format 2 */
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  struct  TCMap2SubHeader_
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  {
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    UShort  firstCode;      /* first valid low byte         */
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    UShort  entryCount;     /* number of valid low bytes    */
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    Short   idDelta;        /* delta value to glyphIndex    */
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    UShort  idRangeOffset;  /* offset from here to 1st code */
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  };
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  typedef struct TCMap2SubHeader_  TCMap2SubHeader;
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  typedef TCMap2SubHeader*         PCMap2SubHeader;
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  struct  TCMap2_
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  {
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    PUShort subHeaderKeys;
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    /* high byte mapping table     */
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    /* value = subHeader index * 8 */
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    PCMap2SubHeader  subHeaders;
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    PUShort          glyphIdArray;
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    UShort           numGlyphId;        /* control value */
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  };
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  typedef struct TCMap2_  TCMap2;
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  typedef TCMap2*         PCMap2;
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  /* format 4 */
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  struct  TCMap4Segment_
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  {
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    UShort  endCount;
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    UShort  startCount;
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    Short   idDelta;        /* in the specs defined as UShort but the
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                               example there gives negative values... */
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    UShort  idRangeOffset;
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  };
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  typedef struct TCMap4Segment_  TCMap4Segment;
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  typedef TCMap4Segment*         PCMap4Segment;
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  struct  TCMap4_
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  {
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    UShort  segCountX2;     /* number of segments * 2       */
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    UShort  searchRange;    /* these parameters can be used */
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    UShort  entrySelector;  /* for a binary search          */
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    UShort  rangeShift;
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    PCMap4Segment  segments;
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    PUShort        glyphIdArray;
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    UShort         numGlyphId;          /* control value */
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  };
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  typedef struct TCMap4_  TCMap4;
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  typedef TCMap4*         PCMap4;
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  /* format 6 */
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  struct  TCMap6_
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  {
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    UShort   firstCode;      /* first character code of subrange      */
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    UShort   entryCount;     /* number of character codes in subrange */
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    PUShort  glyphIdArray;
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  };
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  typedef struct TCMap6_  TCMap6;
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  typedef TCMap6*         PCMap6;
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  /* charmap table */
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  struct  TCMapTable_
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  {
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    UShort  platformID;
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    UShort  platformEncodingID;
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    UShort  format;
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    UShort  length;
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    UShort  version;
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    Bool    loaded;
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    ULong   offset;
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    union
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    {
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      TCMap0  cmap0;
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      TCMap2  cmap2;
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      TCMap4  cmap4;
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      TCMap6  cmap6;
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    } c;
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  };
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  typedef struct TCMapTable_  TCMapTable;
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  typedef TCMapTable*         PCMapTable;
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  /* Load character mappings directory when face is loaded. */
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  /* The mappings themselves are only loaded on demand.     */
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  LOCAL_DEF
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  TT_Error  CharMap_Load( PCMapTable  table,
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                          TT_Stream  input );
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  /* Destroy one character mapping table */
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  LOCAL_DEF
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  TT_Error  CharMap_Free( PCMapTable  table );
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  /* Use character mapping table to perform mapping */
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  LOCAL_DEF
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  UShort  CharMap_Index( PCMapTable  cmap,
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                         UShort      charCode );
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  /* NOTE: The PFace type isn't defined at this point */
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#ifdef __cplusplus
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  }
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#endif
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#endif /* TTCMAP_H */
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/* END */