cid_load_glyph	(	T1_Decoder	decoder,
		FT_UInt	glyph_index
	)
Definition at line 41 of file cidgload.c.
Referenced by cid_slot_load_glyph().
  {
    CID_Face       face = (CID_Face)decoder->builder.face;
    CID_FaceInfo   cid  = &face->cid;
    FT_Byte*       p;
    FT_UInt        fd_select;
    FT_Stream      stream       = face->cid_stream;
    FT_Error       error        = CID_Err_Ok;
    FT_Byte*       charstring   = 0;
    FT_Memory      memory       = face->root.memory;
    FT_ULong       glyph_length = 0;
    PSAux_Service  psaux        = (PSAux_Service)face->psaux;

#ifdef FT_CONFIG_OPTION_INCREMENTAL
    FT_Incremental_InterfaceRec *inc =
                                  face->root.internal->incremental_interface;
#endif


    FT_TRACE4(( "cid_load_glyph: glyph index %d\n", glyph_index ));

#ifdef FT_CONFIG_OPTION_INCREMENTAL

    /* For incremental fonts get the character data using */
    /* the callback function.                             */
    if ( inc )
    {
      FT_Data  glyph_data;


      error = inc->funcs->get_glyph_data( inc->object,
                                          glyph_index, &glyph_data );
      if ( error )
        goto Exit;

      p         = (FT_Byte*)glyph_data.pointer;
      fd_select = (FT_UInt)cid_get_offset( &p, (FT_Byte)cid->fd_bytes );

      if ( glyph_data.length != 0 )
      {
        glyph_length = glyph_data.length - cid->fd_bytes;
        (void)FT_ALLOC( charstring, glyph_length );
        if ( !error )
          ft_memcpy( charstring, glyph_data.pointer + cid->fd_bytes,
                     glyph_length );
      }

      inc->funcs->free_glyph_data( inc->object, &glyph_data );

      if ( error )
        goto Exit;
    }

    else

#endif /* FT_CONFIG_OPTION_INCREMENTAL */

    /* For ordinary fonts read the CID font dictionary index */
    /* and charstring offset from the CIDMap.                */
    {
      FT_UInt   entry_len = cid->fd_bytes + cid->gd_bytes;
      FT_ULong  off1;


      if ( FT_STREAM_SEEK( cid->data_offset + cid->cidmap_offset +
                           glyph_index * entry_len )               ||
           FT_FRAME_ENTER( 2 * entry_len )                         )
        goto Exit;

      p            = (FT_Byte*)stream->cursor;
      fd_select    = (FT_UInt) cid_get_offset( &p, (FT_Byte)cid->fd_bytes );
      off1         = (FT_ULong)cid_get_offset( &p, (FT_Byte)cid->gd_bytes );
      p           += cid->fd_bytes;
      glyph_length = cid_get_offset( &p, (FT_Byte)cid->gd_bytes ) - off1;
      FT_FRAME_EXIT();

      if ( fd_select >= (FT_UInt)cid->num_dicts )
      {
        error = CID_Err_Invalid_Offset;
        goto Exit;
      }
      if ( glyph_length == 0 )
        goto Exit;
      if ( FT_ALLOC( charstring, glyph_length ) )
        goto Exit;
      if ( FT_STREAM_READ_AT( cid->data_offset + off1,
                              charstring, glyph_length ) )
        goto Exit;
    }

    /* Now set up the subrs array and parse the charstrings. */
    {
      CID_FaceDict  dict;
      CID_Subrs     cid_subrs = face->subrs + fd_select;
      FT_Int        cs_offset;


      /* Set up subrs */
      decoder->num_subrs = cid_subrs->num_subrs;
      decoder->subrs     = cid_subrs->code;
      decoder->subrs_len = 0;

      /* Set up font matrix */
      dict                 = cid->font_dicts + fd_select;

      decoder->font_matrix = dict->font_matrix;
      decoder->font_offset = dict->font_offset;
      decoder->lenIV       = dict->private_dict.lenIV;

      /* Decode the charstring. */

      /* Adjustment for seed bytes. */
      cs_offset = ( decoder->lenIV >= 0 ? decoder->lenIV : 0 );

      /* Decrypt only if lenIV >= 0. */
      if ( decoder->lenIV >= 0 )
        psaux->t1_decrypt( charstring, glyph_length, 4330 );

      error = decoder->funcs.parse_charstrings(
                decoder, charstring + cs_offset,
                (FT_Int)glyph_length - cs_offset );
    }

    FT_FREE( charstring );

#ifdef FT_CONFIG_OPTION_INCREMENTAL

    /* Incremental fonts can optionally override the metrics. */
    if ( !error && inc && inc->funcs->get_glyph_metrics )
    {
      FT_Incremental_MetricsRec  metrics;


      metrics.bearing_x = FIXED_TO_INT( decoder->builder.left_bearing.x );
      metrics.bearing_y = 0;
      metrics.advance   = FIXED_TO_INT( decoder->builder.advance.x );
      metrics.advance_v = FIXED_TO_INT( decoder->builder.advance.y );

      error = inc->funcs->get_glyph_metrics( inc->object,
                                             glyph_index, FALSE, &metrics );

      decoder->builder.left_bearing.x = INT_TO_FIXED( metrics.bearing_x );
      decoder->builder.advance.x      = INT_TO_FIXED( metrics.advance );
      decoder->builder.advance.y      = INT_TO_FIXED( metrics.advance_v );
    }

#endif /* FT_CONFIG_OPTION_INCREMENTAL */

  Exit:
    return error;
  }
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