text: /***************************************************************************/
  /*                                                                         */
  /*  cffcmap.c                                                              */
  /*                                                                         */
  /*    CFF character mapping table (cmap) support (body).                   */
  /*                                                                         */
  /*  Copyright 2002, 2003, 2004, 2005, 2006, 2007 by                        */
  /*  David Turner, Robert Wilhelm, and Werner Lemberg.                      */
  /*                                                                         */
  /*  This file is part of the FreeType project, and may only be used,       */
  /*  modified, and distributed under the terms of the FreeType project      */
  /*  license, LICENSE.TXT.  By continuing to use, modify, or distribute     */
  /*  this file you indicate that you have read the license and              */
  /*  understand and accept it fully.                                        */
  /*                                                                         */
  /***************************************************************************/
  
  
  #include "cffcmap.h"
  #include "cffload.h"
  
  #include "cfferrs.h"
  
  
    /*************************************************************************/
    /*************************************************************************/
    /*****                                                               *****/
    /*****           CFF STANDARD (AND EXPERT) ENCODING CMAPS            *****/
    /*****                                                               *****/
    /*************************************************************************/
    /*************************************************************************/
  
    FT_CALLBACK_DEF( FT_Error )
    cff_cmap_encoding_init( CFF_CMapStd  cmap )
    {
      TT_Face       face     = (TT_Face)FT_CMAP_FACE( cmap );
      CFF_Font      cff      = (CFF_Font)face->extra.data;
      CFF_Encoding  encoding = &cff->encoding;
  
  
      cmap->gids  = encoding->codes;
  
      return 0;
    }
  
  
    FT_CALLBACK_DEF( void )
    cff_cmap_encoding_done( CFF_CMapStd  cmap )
    {
      cmap->gids  = NULL;
    }
  
  
    FT_CALLBACK_DEF( FT_UInt )
    cff_cmap_encoding_char_index( CFF_CMapStd  cmap,
                                  FT_UInt32    char_code )
    {
      FT_UInt  result = 0;
  
  
      if ( char_code < 256 )
        result = cmap->gids[char_code];
  
      return result;
    }
  
  
    FT_CALLBACK_DEF( FT_UInt32 )
    cff_cmap_encoding_char_next( CFF_CMapStd   cmap,
                                 FT_UInt32    *pchar_code )
    {
      FT_UInt    result    = 0;
      FT_UInt32  char_code = *pchar_code;
  
  
      *pchar_code = 0;
  
      if ( char_code < 255 )
      {
        FT_UInt  code = (FT_UInt)(char_code + 1);
  
  
        for (;;)
        {
          if ( code >= 256 )
            break;
  
          result = cmap->gids[code];
          if ( result != 0 )
          {
            *pchar_code = code;
            break;
          }
  
          code++;
        }
      }
      return result;
    }
  
  
    FT_DEFINE_CMAP_CLASS(cff_cmap_encoding_class_rec,
      sizeof ( CFF_CMapStdRec ),
  
      (FT_CMap_InitFunc)     cff_cmap_encoding_init,
      (FT_CMap_DoneFunc)     cff_cmap_encoding_done,
      (FT_CMap_CharIndexFunc)cff_cmap_encoding_char_index,
      (FT_CMap_CharNextFunc) cff_cmap_encoding_char_next,
  
      NULL, NULL, NULL, NULL, NULL
    )
  
  
    /*************************************************************************/
    /*************************************************************************/
    /*****                                                               *****/
    /*****              CFF SYNTHETIC UNICODE ENCODING CMAP              *****/
    /*****                                                               *****/
    /*************************************************************************/
    /*************************************************************************/
  
    FT_CALLBACK_DEF( const char* )
    cff_sid_to_glyph_name( TT_Face   face,
                           FT_UInt   idx )
    {
      CFF_Font            cff     = (CFF_Font)face->extra.data;
      CFF_Charset         charset = &cff->charset;
      FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)cff->psnames;
      FT_UInt             sid     = charset->sids[idx];
  
  
      return cff_index_get_sid_string( &cff->string_index, sid, psnames );
    }
  
  
    FT_CALLBACK_DEF( void )
    cff_sid_free_glyph_name( TT_Face      face,
                             const char*  gname )
    {
      FT_Memory  memory = FT_FACE_MEMORY( face );
  
  
      FT_FREE( gname );
    }
  
  
    FT_CALLBACK_DEF( FT_Error )
    cff_cmap_unicode_init( PS_Unicodes  unicodes )
    {
      TT_Face             face    = (TT_Face)FT_CMAP_FACE( unicodes );
      FT_Memory           memory  = FT_FACE_MEMORY( face );
      CFF_Font            cff     = (CFF_Font)face->extra.data;
      CFF_Charset         charset = &cff->charset;
      FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)cff->psnames;
  
  
      /* can't build Unicode map for CID-keyed font */
      if ( !charset->sids )
        return CFF_Err_Invalid_Argument;
  
      return psnames->unicodes_init( memory,
                                     unicodes,
                                     cff->num_glyphs,
                                     (PS_GetGlyphNameFunc)&cff_sid_to_glyph_name,
                                     (PS_FreeGlyphNameFunc)&cff_sid_free_glyph_name,
                                     (FT_Pointer)face );
    }
  
  
    FT_CALLBACK_DEF( void )
    cff_cmap_unicode_done( PS_Unicodes  unicodes )
    {
      FT_Face    face   = FT_CMAP_FACE( unicodes );
      FT_Memory  memory = FT_FACE_MEMORY( face );
  
  
      FT_FREE( unicodes->maps );
      unicodes->num_maps = 0;
    }
  
  
    FT_CALLBACK_DEF( FT_UInt )
    cff_cmap_unicode_char_index( PS_Unicodes  unicodes,
                                 FT_UInt32    char_code )
    {
      TT_Face             face    = (TT_Face)FT_CMAP_FACE( unicodes );
      CFF_Font            cff     = (CFF_Font)face->extra.data;
      FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)cff->psnames;
  
  
      return psnames->unicodes_char_index( unicodes, char_code );
    }
  
  
    FT_CALLBACK_DEF( FT_UInt32 )
    cff_cmap_unicode_char_next( PS_Unicodes  unicodes,
                                FT_UInt32   *pchar_code )
    {
      TT_Face             face    = (TT_Face)FT_CMAP_FACE( unicodes );
      CFF_Font            cff     = (CFF_Font)face->extra.data;
      FT_Service_PsCMaps  psnames = (FT_Service_PsCMaps)cff->psnames;
  
  
      return psnames->unicodes_char_next( unicodes, pchar_code );
    }
  
  
    FT_DEFINE_CMAP_CLASS(cff_cmap_unicode_class_rec,
      sizeof ( PS_UnicodesRec ),
  
      (FT_CMap_InitFunc)     cff_cmap_unicode_init,
      (FT_CMap_DoneFunc)     cff_cmap_unicode_done,
      (FT_CMap_CharIndexFunc)cff_cmap_unicode_char_index,
      (FT_CMap_CharNextFunc) cff_cmap_unicode_char_next,
  
      NULL, NULL, NULL, NULL, NULL
    )
  
  /* END */
  