type1cid.c

ucgui的矢量字库支持包,可以象windows一样使用truetype的字库了

      offset = &dict->font_offset;

      (void)cid_parser_to_fixed_array( parser, 6, temp, 3 );

      temp_scale = FT_ABS( temp[3] );

      /* Set units per EM based on FontMatrix values.  We set the value to */
      /* `1000/temp_scale', because temp_scale was already multiplied by   */
      /* 1000 (in `t1_tofixed', from psobjs.c).                            */
      root->units_per_EM = (FT_UShort)( FT_DivFix( 0x10000L,
                                        FT_DivFix( temp_scale, 1000 ) ) );

      /* we need to scale the values by 1.0/temp[3] */
      if ( temp_scale != 0x10000L )
      {
        temp[0] = FT_DivFix( temp[0], temp_scale );
        temp[1] = FT_DivFix( temp[1], temp_scale );
        temp[2] = FT_DivFix( temp[2], temp_scale );
        temp[4] = FT_DivFix( temp[4], temp_scale );
        temp[5] = FT_DivFix( temp[5], temp_scale );
        temp[3] = 0x10000L;
      }

      matrix->xx = temp[0];
      matrix->yx = temp[1];
      matrix->xy = temp[2];
      matrix->yy = temp[3];

      /* note that the font offsets are expressed in integer font units */
      offset->x  = temp[4] >> 16;
      offset->y  = temp[5] >> 16;
    }

    return CID_Err_Ok;      /* this is a callback function; */
                            /* we must return an error code */
  }


  FT_CALLBACK_DEF( FT_Error )
  parse_fd_array( CID_Face     face,
                  CID_Parser*  parser )
  {
    CID_FaceInfo  cid    = &face->cid;
    FT_Memory     memory = face->root.memory;
    FT_Error      error  = CID_Err_Ok;
    FT_Long       num_dicts;


    num_dicts = cid_parser_to_int( parser );

    if ( !cid->font_dicts )
    {
      FT_Int  n;


      if ( FT_NEW_ARRAY( cid->font_dicts, num_dicts ) )
        goto Exit;

      cid->num_dicts = (FT_UInt)num_dicts;

      /* don't forget to set a few defaults */
      for ( n = 0; n < cid->num_dicts; n++ )
      {
        CID_FaceDict  dict = cid->font_dicts + n;


        /* default value for lenIV */
        dict->private_dict.lenIV = 4;
      }
    }

  Exit:
    return error;
  }


  static
  const T1_FieldRec  cid_field_records[] =
  {

#include "cidtoken.h"

    T1_FIELD_CALLBACK( "FDArray",    parse_fd_array )
    T1_FIELD_CALLBACK( "FontMatrix", parse_font_matrix )

    { 0, T1_FIELD_LOCATION_CID_INFO, T1_FIELD_TYPE_NONE, 0, 0, 0, 0, 0 }
  };


  static FT_Error
  cid_parse_dict( CID_Face     face,
                  CID_Loader*  loader,
                  FT_Byte*     base,
                  FT_Long      size )
  {
    CID_Parser*  parser = &loader->parser;


    parser->root.cursor = base;
    parser->root.limit  = base + size;
    parser->root.error  = CID_Err_Ok;

    {
      FT_Byte*  cur   = base;
      FT_Byte*  limit = cur + size;


      for (;;)
      {
        FT_Byte*  newlimit;


        parser->root.cursor = cur;
        cid_parser_skip_spaces( parser );

        if ( parser->root.cursor >= limit )
          newlimit = limit - 1 - 17;
        else
          newlimit = parser->root.cursor - 17;

        /* look for `%ADOBeginFontDict' */
        for ( ; cur < newlimit; cur++ )
        {
          if ( *cur == '%'                                            &&
               ft_strncmp( (char*)cur, "%ADOBeginFontDict", 17 ) == 0 )
          {
            /* if /FDArray was found, then cid->num_dicts is > 0, and */
            /* we can start increasing parser->num_dict               */
            if ( face->cid.num_dicts > 0 )
              parser->num_dict++;
          }
        }

        cur = parser->root.cursor;
        /* no error can occur in cid_parser_skip_spaces */
        if ( cur >= limit )
          break;

        cid_parser_skip_PS_token( parser );
        if ( parser->root.cursor >= limit || parser->root.error )
          break;

        /* look for immediates */
        if ( *cur == '/' && cur + 2 < limit )
        {
          FT_PtrDist  len;


          cur++;
          len = parser->root.cursor - cur;

          if ( len > 0 && len < 22 )
          {
            /* now compare the immediate name to the keyword table */
            T1_Field  keyword = (T1_Field)cid_field_records;


            for (;;)
            {
              FT_Byte*  name;


              name = (FT_Byte*)keyword->ident;
              if ( !name )
                break;

              if ( cur[0] == name[0]                                 &&
                   len == (FT_PtrDist)ft_strlen( (const char*)name ) )
              {
                FT_PtrDist  n;


                for ( n = 1; n < len; n++ )
                  if ( cur[n] != name[n] )
                    break;

                if ( n >= len )
                {
                  /* we found it - run the parsing callback */
                  parser->root.error = cid_load_keyword( face,
                                                         loader,
                                                         keyword );
                  if ( parser->root.error )
                    return parser->root.error;
                  break;
                }
              }
              keyword++;
            }
          }
        }

        cur = parser->root.cursor;
      }
    }
    return parser->root.error;
  }


  /* read the subrmap and the subrs of each font dict */
  static FT_Error
  cid_read_subrs( CID_Face  face )
  {
    CID_FaceInfo   cid    = &face->cid;
    FT_Memory      memory = face->root.memory;
    FT_Stream      stream = face->cid_stream;
    FT_Error       error;
    FT_Int         n;
    CID_Subrs      subr;
    FT_UInt        max_offsets = 0;
    FT_ULong*      offsets = 0;
    PSAux_Service  psaux = (PSAux_Service)face->psaux;


    if ( FT_NEW_ARRAY( face->subrs, cid->num_dicts ) )
      goto Exit;

    subr = face->subrs;
    for ( n = 0; n < cid->num_dicts; n++, subr++ )
    {
      CID_FaceDict  dict  = cid->font_dicts + n;
      FT_Int        lenIV = dict->private_dict.lenIV;
      FT_UInt       count, num_subrs = dict->num_subrs;
      FT_ULong      data_len;
      FT_Byte*      p;


      /* reallocate offsets array if needed */
      if ( num_subrs + 1 > max_offsets )
      {
        FT_UInt  new_max = FT_PAD_CEIL( num_subrs + 1, 4 );


        if ( FT_RENEW_ARRAY( offsets, max_offsets, new_max ) )
          goto Fail;

        max_offsets = new_max;
      }

      /* read the subrmap's offsets */
      if ( FT_STREAM_SEEK( cid->data_offset + dict->subrmap_offset ) ||
           FT_FRAME_ENTER( ( num_subrs + 1 ) * dict->sd_bytes )      )
        goto Fail;

      p = (FT_Byte*)stream->cursor;
      for ( count = 0; count <= num_subrs; count++ )
        offsets[count] = cid_get_offset( &p, (FT_Byte)dict->sd_bytes );

      FT_FRAME_EXIT();

      /* now, compute the size of subrs charstrings, */
      /* allocate, and read them                     */
      data_len = offsets[num_subrs] - offsets[0];

      if ( FT_NEW_ARRAY( subr->code, num_subrs + 1 ) ||
               FT_ALLOC( subr->code[0], data_len )   )
        goto Fail;

      if ( FT_STREAM_SEEK( cid->data_offset + offsets[0] ) ||
           FT_STREAM_READ( subr->code[0], data_len )  )
        goto Fail;

      /* set up pointers */
      for ( count = 1; count <= num_subrs; count++ )
      {
        FT_ULong  len;


        len               = offsets[count] - offsets[count - 1];
        subr->code[count] = subr->code[count - 1] + len;
      }

      /* decrypt subroutines, but only if lenIV >= 0 */
      if ( lenIV >= 0 )
      {
        for ( count = 0; count < num_subrs; count++ )
        {
          FT_ULong  len;


          len = offsets[count + 1] - offsets[count];
          psaux->t1_decrypt( subr->code[count], len, 4330 );
        }
      }

      subr->num_subrs = num_subrs;
    }

  Exit:
    FT_FREE( offsets );
    return error;

  Fail:
    if ( face->subrs )
    {
      for ( n = 0; n < cid->num_dicts; n++ )
      {
        if ( face->subrs[n].code )
          FT_FREE( face->subrs[n].code[0] );

        FT_FREE( face->subrs[n].code );
      }
      FT_FREE( face->subrs );
    }
    goto Exit;
  }


  static void
  t1_init_loader( CID_Loader*  loader,
                  CID_Face     face )
  {
    FT_UNUSED( face );

    FT_MEM_ZERO( loader, sizeof ( *loader ) );
  }


  static void
  t1_done_loader( CID_Loader*  loader )
  {
    CID_Parser*  parser = &loader->parser;


    /* finalize parser */
    cid_parser_done( parser );
  }


  static FT_Error
  cid_hex_to_binary( FT_Byte*  data,
                     FT_Long   data_len,
                     FT_ULong  offset,
                     CID_Face  face )
  {
    FT_Stream  stream = face->root.stream;
    FT_Error   error;

    FT_Byte    buffer[256];
    FT_Byte   *p, *plimit;
    FT_Byte   *d, *dlimit;
    FT_Byte    val;

    FT_Bool    upper_nibble, done;


    if ( FT_STREAM_SEEK( offset ) )
      goto Exit;

    d      = data;
    dlimit = d + data_len;
    p      = buffer;
    plimit = p;

    upper_nibble = 1;
    done         = 0;

    while ( d < dlimit )
    {
      if ( p >= plimit )
      {
        FT_ULong  oldpos = FT_STREAM_POS();
        FT_ULong  size   = stream->size - oldpos;


        if ( size == 0 )
        {
          error = CID_Err_Syntax_Error;
          goto Exit;
        }

        if ( FT_STREAM_READ( buffer, 256 > size ? size : 256 ) )
          goto Exit;
        p      = buffer;
        plimit = p + FT_STREAM_POS() - oldpos;
      }

      if ( ft_isdigit( *p ) )
        val = (FT_Byte)( *p - '0' );
      else if ( *p >= 'a' && *p <= 'f' )
        val = (FT_Byte)( *p - 'a' );
      else if ( *p >= 'A' && *p <= 'F' )
        val = (FT_Byte)( *p - 'A' + 10 );
      else if ( *p == ' '  ||
                *p == '\t' ||
                *p == '\r' ||
                *p == '\n' ||