Beispiel #1
0
  static FT_Error
  CFF_Load_FD_Select( CFF_FDSelect  fdselect,
                      FT_UInt       num_glyphs,
                      FT_Stream     stream,
                      FT_ULong      offset )
  {
    FT_Error  error;
    FT_Byte   format;
    FT_UInt   num_ranges;


    /* read format */
    if ( FT_STREAM_SEEK( offset ) || FT_READ_BYTE( format ) )
      goto Exit;

    fdselect->format      = format;
    fdselect->cache_count = 0;   /* clear cache */

    switch ( format )
    {
    case 0:     /* format 0, that's simple */
      fdselect->data_size = num_glyphs;
      goto Load_Data;

    case 3:     /* format 3, a tad more complex */
      if ( FT_READ_USHORT( num_ranges ) )
        goto Exit;

      fdselect->data_size = num_ranges * 3 + 2;

    Load_Data:
      if ( FT_FRAME_EXTRACT( fdselect->data_size, fdselect->data ) )
        goto Exit;
      break;

    default:    /* hmm... that's wrong */
      error = CFF_Err_Invalid_File_Format;
    }

  Exit:
    return error;
  }
Beispiel #2
0
  tt_face_goto_table( TT_Face    face,
                      FT_ULong   tag,
                      FT_Stream  stream,
                      FT_ULong*  length )
  {
    TT_Table  table;
    FT_Error  error;


    table = tt_face_lookup_table( face, tag );
    if ( table )
    {
      if ( length )
        *length = table->Length;

      if ( FT_STREAM_SEEK( table->Offset ) )
        goto Exit;
    }
    else
      error = SFNT_Err_Table_Missing;

  Exit:
    return error;
  }
Beispiel #3
0
  /* check and skip .bz2 header - we don't support `transparent' compression */
  static FT_Error
  ft_bzip2_check_header( FT_Stream  stream )
  {
    FT_Error  error = FT_Err_Ok;
    FT_Byte   head[4];


    if ( FT_STREAM_SEEK( 0 )       ||
         FT_STREAM_READ( head, 4 ) )
      goto Exit;

    /* head[0] && head[1] are the magic numbers;    */
    /* head[2] is the version, and head[3] the blocksize */
    if ( head[0] != 0x42  ||
         head[1] != 0x5a  ||
         head[2] != 0x68  )  /* only support bzip2 (huffman) */
    {
      error = FT_THROW( Invalid_File_Format );
      goto Exit;
    }

  Exit:
    return error;
  }
Beispiel #4
0
/* check and skip .gz header - we don't support `transparent' compression */
static FT_Error
ft_gzip_check_header( FT_Stream  stream )
{
    FT_Error  error;
    FT_Byte   head[4];


    if ( FT_STREAM_SEEK( 0 )       ||
            FT_STREAM_READ( head, 4 ) )
        goto Exit;

    /* head[0] && head[1] are the magic numbers;    */
    /* head[2] is the method, and head[3] the flags */
    if ( head[0] != 0x1f              ||
            head[1] != 0x8b              ||
            head[2] != Z_DEFLATED        ||
            (head[3] & FT_GZIP_RESERVED)  )
    {
        error = Gzip_Err_Invalid_File_Format;
        goto Exit;
    }

    /* skip time, xflags and os code */
    (void)FT_STREAM_SKIP( 6 );

    /* skip the extra field */
    if ( head[3] & FT_GZIP_EXTRA_FIELD )
    {
        FT_UInt  len;


        if ( FT_READ_USHORT_LE( len ) ||
                FT_STREAM_SKIP( len )    )
            goto Exit;
    }

    /* skip original file name */
    if ( head[3] & FT_GZIP_ORIG_NAME )
        for (;;)
        {
            FT_UInt  c;


            if ( FT_READ_BYTE( c ) )
                goto Exit;

            if ( c == 0 )
                break;
        }

    /* skip .gz comment */
    if ( head[3] & FT_GZIP_COMMENT )
        for (;;)
        {
            FT_UInt  c;


            if ( FT_READ_BYTE( c ) )
                goto Exit;

            if ( c == 0 )
                break;
        }

    /* skip CRC */
    if ( head[3] & FT_GZIP_HEAD_CRC )
        if ( FT_STREAM_SKIP( 2 ) )
            goto Exit;

Exit:
    return error;
}
Beispiel #5
0
static FT_Error
tt_face_get_name(TT_Face face,
                 FT_UShort nameid,
                 FT_String **name)
{
    FT_Memory       memory  = face->root.memory;
    FT_Error        error   = SFNT_Err_Ok;
    FT_String       *result = NULL;
    FT_UShort       n;
    TT_NameEntryRec *rec;
    FT_Int          found_apple         = -1;
    FT_Int          found_apple_roman   = -1;
    FT_Int          found_apple_english = -1;
    FT_Int          found_win           = -1;
    FT_Int          found_unicode       = -1;

    FT_Bool is_english = 0;

    TT_NameEntry_ConvertFunc convert;


    FT_ASSERT(name);

    rec = face->name_table.names;

    for (n = 0; n < face->num_names; n++, rec++)
    {
        /* According to the OpenType 1.3 specification, only Microsoft or  */
        /* Apple platform IDs might be used in the `name' table.  The      */
        /* `Unicode' platform is reserved for the `cmap' table, and the    */
        /* `ISO' one is deprecated.                                        */
        /*                                                                 */
        /* However, the Apple TrueType specification doesn't say the same  */
        /* thing and goes to suggest that all Unicode `name' table entries */
        /* should be coded in UTF-16 (in big-endian format I suppose).     */
        /*                                                                 */
        if (rec->nameID == nameid && rec->stringLength > 0)
        {
            switch (rec->platformID)
            {
            case TT_PLATFORM_APPLE_UNICODE:
            case TT_PLATFORM_ISO:
                /* there is `languageID' to check there.  We should use this */
                /* field only as a last solution when nothing else is        */
                /* available.                                                */
                /*                                                           */
                found_unicode = n;
                break;

            case TT_PLATFORM_MACINTOSH:
                /* This is a bit special because some fonts will use either    */
                /* an English language id, or a Roman encoding id, to indicate */
                /* the English version of its font name.                       */
                /*                                                             */
                if (rec->languageID == TT_MAC_LANGID_ENGLISH)
                    found_apple_english = n;
                else if (rec->encodingID == TT_MAC_ID_ROMAN)
                    found_apple_roman = n;

                break;

            case TT_PLATFORM_MICROSOFT:
                /* we only take a non-English name when there is nothing */
                /* else available in the font                            */
                /*                                                       */
                if (found_win == -1 || (rec->languageID & 0x3FF) == 0x009)
                {
                    switch (rec->encodingID)
                    {
                    case TT_MS_ID_SYMBOL_CS:
                    case TT_MS_ID_UNICODE_CS:
                    case TT_MS_ID_UCS_4:
                        is_english = FT_BOOL((rec->languageID & 0x3FF) == 0x009);
                        found_win  = n;
                        break;

                    default:
                        ;
                    }
                }

                break;

            default:
                ;
            }
        }
    }

    found_apple = found_apple_roman;
    if (found_apple_english >= 0)
        found_apple = found_apple_english;

    /* some fonts contain invalid Unicode or Macintosh formatted entries; */
    /* we will thus favor names encoded in Windows formats if available   */
    /* (provided it is an English name)                                   */
    /*                                                                    */
    convert = NULL;
    if (found_win >= 0 && !(found_apple >= 0 && !is_english))
    {
        rec = face->name_table.names + found_win;

        switch (rec->encodingID)
        {
        /* all Unicode strings are encoded using UTF-16BE */
        case TT_MS_ID_UNICODE_CS:
        case TT_MS_ID_SYMBOL_CS:
            convert = tt_name_entry_ascii_from_utf16;
            break;

        case TT_MS_ID_UCS_4:
            /* Apparently, if this value is found in a name table entry, it is */
            /* documented as `full Unicode repertoire'.  Experience with the   */
            /* MsGothic font shipped with Windows Vista shows that this really */
            /* means UTF-16 encoded names (UCS-4 values are only used within   */
            /* charmaps).                                                      */
            convert = tt_name_entry_ascii_from_utf16;
            break;

        default:
            ;
        }
    }
    else if (found_apple >= 0)
    {
        rec     = face->name_table.names + found_apple;
        convert = tt_name_entry_ascii_from_other;
    }
    else if (found_unicode >= 0)
    {
        rec     = face->name_table.names + found_unicode;
        convert = tt_name_entry_ascii_from_utf16;
    }

    if (rec && convert)
    {
        if (rec->string == NULL)
        {
            FT_Stream stream = face->name_table.stream;


            if (FT_QNEW_ARRAY (rec->string, rec->stringLength) ||
                FT_STREAM_SEEK(rec->stringOffset) ||
                FT_STREAM_READ(rec->string, rec->stringLength))
            {
                FT_FREE(rec->string);
                rec->stringLength = 0;
                result            = NULL;
                goto Exit;
            }
        }

        result = convert(rec, memory);
    }

Exit:
    *name = result;
    return error;
}
Beispiel #6
0
  tt_face_init( FT_Stream      stream,
                FT_Face        ttface,      /* TT_Face */
                FT_Int         face_index,
                FT_Int         num_params,
                FT_Parameter*  params )
  {
    FT_Error      error;
    FT_Library    library;
    SFNT_Service  sfnt;
    TT_Face       face = (TT_Face)ttface;


    library = face->root.driver->root.library;
    sfnt    = (SFNT_Service)FT_Get_Module_Interface( library, "sfnt" );
    if ( !sfnt )
      goto Bad_Format;

    /* create input stream from resource */
    if ( FT_STREAM_SEEK( 0 ) )
      goto Exit;

    /* check that we have a valid TrueType file */
    error = sfnt->init_face( stream, face, face_index, num_params, params );
    if ( error )
      goto Exit;

    /* We must also be able to accept Mac/GX fonts, as well as OT ones. */
    /* The 0x00020000 tag is completely undocumented; some fonts from   */
    /* Arphic made for Chinese Windows 3.1 have this.                   */
    if ( face->format_tag != 0x00010000L &&    /* MS fonts  */
         face->format_tag != 0x00020000L &&    /* CJK fonts for Win 3.1 */
         face->format_tag != TTAG_true   )     /* Mac fonts */
    {
      FT_TRACE2(( "[not a valid TTF font]\n" ));
      goto Bad_Format;
    }

#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
    face->root.face_flags |= FT_FACE_FLAG_HINTER;
#endif

    /* If we are performing a simple font format check, exit immediately. */
    if ( face_index < 0 )
      return TT_Err_Ok;

    /* Load font directory */
    error = sfnt->load_face( stream, face, face_index, num_params, params );
    if ( error )
      goto Exit;

    error = tt_face_load_hdmx( face, stream );
    if ( error )
      goto Exit;

    if ( face->root.face_flags & FT_FACE_FLAG_SCALABLE )
    {

#ifdef FT_CONFIG_OPTION_INCREMENTAL

      if ( !face->root.internal->incremental_interface )
        error = tt_face_load_loca( face, stream );
      if ( !error )
        error = tt_face_load_cvt( face, stream )  ||
                tt_face_load_fpgm( face, stream ) ||
                tt_face_load_prep( face, stream );

#else

      if ( !error )
        error = tt_face_load_loca( face, stream ) ||
                tt_face_load_cvt( face, stream )  ||
                tt_face_load_fpgm( face, stream ) ||
                tt_face_load_prep( face, stream );

#endif

    }

#ifdef TT_CONFIG_OPTION_UNPATENTED_HINTING

    /* Determine whether unpatented hinting is to be used for this face. */
    face->unpatented_hinting = FT_BOOL
       ( library->debug_hooks[ FT_DEBUG_HOOK_UNPATENTED_HINTING ] != NULL );

    {
      int  i;


      for ( i = 0; i < num_params && !face->unpatented_hinting; i++ )
        if ( params[i].tag == FT_PARAM_TAG_UNPATENTED_HINTING )
          face->unpatented_hinting = TRUE;
    }

#endif /* TT_CONFIG_OPTION_UNPATENTED_HINTING */

    /* initialize standard glyph loading routines */
    TT_Init_Glyph_Loading( face );

  Exit:
    return error;

  Bad_Format:
    error = TT_Err_Unknown_File_Format;
    goto Exit;
  }
Beispiel #7
0
  cff_face_init( FT_Stream      stream,
                 FT_Face        cffface,        /* CFF_Face */
                 FT_Int         face_index,
                 FT_Int         num_params,
                 FT_Parameter*  params )
  {
    CFF_Face            face        = (CFF_Face)cffface;
    FT_Error            error;
    SFNT_Service        sfnt;
    FT_Service_PsCMaps  psnames;
    PSHinter_Service    pshinter;
    FT_Bool             pure_cff    = 1;
    FT_Bool             sfnt_format = 0;
    FT_Library          library     = cffface->driver->root.library;


    sfnt = (SFNT_Service)FT_Get_Module_Interface(
             library, "sfnt" );
    if ( !sfnt )
    {
      FT_ERROR(( "cff_face_init: cannot access `sfnt' module\n" ));
      error = FT_THROW( Missing_Module );
      goto Exit;
    }

    FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );

    pshinter = (PSHinter_Service)FT_Get_Module_Interface(
                 library, "pshinter" );

    FT_TRACE2(( "CFF driver\n" ));

    /* create input stream from resource */
    if ( FT_STREAM_SEEK( 0 ) )
      goto Exit;

    /* check whether we have a valid OpenType file */
    error = sfnt->init_face( stream, face, face_index, num_params, params );
    if ( !error )
    {
      if ( face->format_tag != TTAG_OTTO )  /* `OTTO'; OpenType/CFF font */
      {
        FT_TRACE2(( "  not an OpenType/CFF font\n" ));
        error = FT_THROW( Unknown_File_Format );
        goto Exit;
      }

      /* if we are performing a simple font format check, exit immediately */
      if ( face_index < 0 )
        return FT_Err_Ok;

      sfnt_format = 1;

      /* now, the font can be either an OpenType/CFF font, or an SVG CEF */
      /* font; in the latter case it doesn't have a `head' table         */
      error = face->goto_table( face, TTAG_head, stream, 0 );
      if ( !error )
      {
        pure_cff = 0;

        /* load font directory */
        error = sfnt->load_face( stream, face, face_index,
                                 num_params, params );
        if ( error )
          goto Exit;
      }
      else
      {
        /* load the `cmap' table explicitly */
        error = sfnt->load_cmap( face, stream );
        if ( error )
          goto Exit;
      }

      /* now load the CFF part of the file */
      error = face->goto_table( face, TTAG_CFF, stream, 0 );
      if ( error )
        goto Exit;
    }
    else
    {
      /* rewind to start of file; we are going to load a pure-CFF font */
      if ( FT_STREAM_SEEK( 0 ) )
        goto Exit;
      error = FT_Err_Ok;
    }

    /* now load and parse the CFF table in the file */
    {
      CFF_Font         cff = NULL;
      CFF_FontRecDict  dict;
      FT_Memory        memory = cffface->memory;
      FT_Int32         flags;
      FT_UInt          i;


      if ( FT_NEW( cff ) )
        goto Exit;

      face->extra.data = cff;
      error = cff_font_load( library, stream, face_index, cff, pure_cff );
      if ( error )
        goto Exit;

      cff->pshinter = pshinter;
      cff->psnames  = psnames;

      cffface->face_index = face_index;

      /* Complement the root flags with some interesting information. */
      /* Note that this is only necessary for pure CFF and CEF fonts; */
      /* SFNT based fonts use the `name' table instead.               */

      cffface->num_glyphs = cff->num_glyphs;

      dict = &cff->top_font.font_dict;

      /* we need the `PSNames' module for CFF and CEF formats */
      /* which aren't CID-keyed                               */
      if ( dict->cid_registry == 0xFFFFU && !psnames )
      {
        FT_ERROR(( "cff_face_init:"
                   " cannot open CFF & CEF fonts\n"
                   "              "
                   " without the `PSNames' module\n" ));
        error = FT_THROW( Missing_Module );
        goto Exit;
      }

#ifdef FT_DEBUG_LEVEL_TRACE
      {
        FT_UInt     idx;
        FT_String*  s;


        FT_TRACE4(( "SIDs\n" ));

        /* dump string index, including default strings for convenience */
        for ( idx = 0; idx < cff->num_strings + 390; idx++ )
        {
          s = cff_index_get_sid_string( cff, idx );
          if ( s )
            FT_TRACE4(("  %5d %s\n", idx, s ));
        }
      }
#endif /* FT_DEBUG_LEVEL_TRACE */

      if ( !dict->has_font_matrix )
        dict->units_per_em = pure_cff ? 1000 : face->root.units_per_EM;

      /* Normalize the font matrix so that `matrix->xx' is 1; the */
      /* scaling is done with `units_per_em' then (at this point, */
      /* it already contains the scaling factor, but without      */
      /* normalization of the matrix).                            */
      /*                                                          */
      /* Note that the offsets must be expressed in integer font  */
      /* units.                                                   */

      {
        FT_Matrix*  matrix = &dict->font_matrix;
        FT_Vector*  offset = &dict->font_offset;
        FT_ULong*   upm    = &dict->units_per_em;
        FT_Fixed    temp   = FT_ABS( matrix->yy );


        if ( temp != 0x10000L )
        {
          *upm = FT_DivFix( *upm, temp );

          matrix->xx = FT_DivFix( matrix->xx, temp );
          matrix->yx = FT_DivFix( matrix->yx, temp );
          matrix->xy = FT_DivFix( matrix->xy, temp );
          matrix->yy = FT_DivFix( matrix->yy, temp );
          offset->x  = FT_DivFix( offset->x,  temp );
          offset->y  = FT_DivFix( offset->y,  temp );
        }

        offset->x >>= 16;
        offset->y >>= 16;
      }

      for ( i = cff->num_subfonts; i > 0; i-- )
      {
        CFF_FontRecDict  sub = &cff->subfonts[i - 1]->font_dict;
        CFF_FontRecDict  top = &cff->top_font.font_dict;

        FT_Matrix*  matrix;
        FT_Vector*  offset;
        FT_ULong*   upm;
        FT_Fixed    temp;


        if ( sub->has_font_matrix )
        {
          FT_Long  scaling;


          /* if we have a top-level matrix, */
          /* concatenate the subfont matrix */

          if ( top->has_font_matrix )
          {
            if ( top->units_per_em > 1 && sub->units_per_em > 1 )
              scaling = FT_MIN( top->units_per_em, sub->units_per_em );
            else
              scaling = 1;

            FT_Matrix_Multiply_Scaled( &top->font_matrix,
                                       &sub->font_matrix,
                                       scaling );
            FT_Vector_Transform_Scaled( &sub->font_offset,
                                        &top->font_matrix,
                                        scaling );

            sub->units_per_em = FT_MulDiv( sub->units_per_em,
                                           top->units_per_em,
                                           scaling );
          }
        }
        else
        {
          sub->font_matrix = top->font_matrix;
          sub->font_offset = top->font_offset;

          sub->units_per_em = top->units_per_em;
        }

        matrix = &sub->font_matrix;
        offset = &sub->font_offset;
        upm    = &sub->units_per_em;
        temp   = FT_ABS( matrix->yy );

        if ( temp != 0x10000L )
        {
          *upm = FT_DivFix( *upm, temp );

          matrix->xx = FT_DivFix( matrix->xx, temp );
          matrix->yx = FT_DivFix( matrix->yx, temp );
          matrix->xy = FT_DivFix( matrix->xy, temp );
          matrix->yy = FT_DivFix( matrix->yy, temp );
          offset->x  = FT_DivFix( offset->x,  temp );
          offset->y  = FT_DivFix( offset->y,  temp );
        }

        offset->x >>= 16;
        offset->y >>= 16;
      }

      if ( pure_cff )
      {
        char*  style_name = NULL;


        /* set up num_faces */
        cffface->num_faces = cff->num_faces;

        /* compute number of glyphs */
        if ( dict->cid_registry != 0xFFFFU )
          cffface->num_glyphs = cff->charset.max_cid + 1;
        else
          cffface->num_glyphs = cff->charstrings_index.count;

        /* set global bbox, as well as EM size */
        cffface->bbox.xMin =   dict->font_bbox.xMin            >> 16;
        cffface->bbox.yMin =   dict->font_bbox.yMin            >> 16;
        /* no `U' suffix here to 0xFFFF! */
        cffface->bbox.xMax = ( dict->font_bbox.xMax + 0xFFFF ) >> 16;
        cffface->bbox.yMax = ( dict->font_bbox.yMax + 0xFFFF ) >> 16;

        cffface->units_per_EM = (FT_UShort)( dict->units_per_em );

        cffface->ascender  = (FT_Short)( cffface->bbox.yMax );
        cffface->descender = (FT_Short)( cffface->bbox.yMin );

        cffface->height = (FT_Short)( ( cffface->units_per_EM * 12 ) / 10 );
        if ( cffface->height < cffface->ascender - cffface->descender )
          cffface->height = (FT_Short)( cffface->ascender - cffface->descender );

        cffface->underline_position  =
          (FT_Short)( dict->underline_position >> 16 );
        cffface->underline_thickness =
          (FT_Short)( dict->underline_thickness >> 16 );

        /* retrieve font family & style name */
        cffface->family_name = cff_index_get_name( cff, face_index );
        if ( cffface->family_name )
        {
          char*  full   = cff_index_get_sid_string( cff,
                                                    dict->full_name );
          char*  fullp  = full;
          char*  family = cffface->family_name;
          char*  family_name = NULL;


          remove_subset_prefix( cffface->family_name );

          if ( dict->family_name )
          {
            family_name = cff_index_get_sid_string( cff,
                                                    dict->family_name );
            if ( family_name )
              family = family_name;
          }

          /* We try to extract the style name from the full name.   */
          /* We need to ignore spaces and dashes during the search. */
          if ( full && family )
          {
            while ( *fullp )
            {
              /* skip common characters at the start of both strings */
              if ( *fullp == *family )
              {
                family++;
                fullp++;
                continue;
              }

              /* ignore spaces and dashes in full name during comparison */
              if ( *fullp == ' ' || *fullp == '-' )
              {
                fullp++;
                continue;
              }

              /* ignore spaces and dashes in family name during comparison */
              if ( *family == ' ' || *family == '-' )
              {
                family++;
                continue;
              }

              if ( !*family && *fullp )
              {
                /* The full name begins with the same characters as the  */
                /* family name, with spaces and dashes removed.  In this */
                /* case, the remaining string in `fullp' will be used as */
                /* the style name.                                       */
                style_name = cff_strcpy( memory, fullp );

                /* remove the style part from the family name (if present) */
                remove_style( cffface->family_name, style_name );
              }
              break;
            }
          }
        }
        else
        {
          char  *cid_font_name =
                   cff_index_get_sid_string( cff,
                                             dict->cid_font_name );


          /* do we have a `/FontName' for a CID-keyed font? */
          if ( cid_font_name )
            cffface->family_name = cff_strcpy( memory, cid_font_name );
        }

        if ( style_name )
          cffface->style_name = style_name;
        else
          /* assume "Regular" style if we don't know better */
          cffface->style_name = cff_strcpy( memory, (char *)"Regular" );

        /*******************************************************************/
        /*                                                                 */
        /* Compute face flags.                                             */
        /*                                                                 */
        flags = FT_FACE_FLAG_SCALABLE   | /* scalable outlines */
                FT_FACE_FLAG_HORIZONTAL | /* horizontal data   */
                FT_FACE_FLAG_HINTER;      /* has native hinter */

        if ( sfnt_format )
          flags |= FT_FACE_FLAG_SFNT;

        /* fixed width font? */
        if ( dict->is_fixed_pitch )
          flags |= FT_FACE_FLAG_FIXED_WIDTH;

  /* XXX: WE DO NOT SUPPORT KERNING METRICS IN THE GPOS TABLE FOR NOW */
#if 0
        /* kerning available? */
        if ( face->kern_pairs )
          flags |= FT_FACE_FLAG_KERNING;
#endif

        cffface->face_flags |= flags;

        /*******************************************************************/
        /*                                                                 */
        /* Compute style flags.                                            */
        /*                                                                 */
        flags = 0;

        if ( dict->italic_angle )
          flags |= FT_STYLE_FLAG_ITALIC;

        {
          char  *weight = cff_index_get_sid_string( cff,
                                                    dict->weight );


          if ( weight )
            if ( !ft_strcmp( weight, "Bold"  ) ||
                 !ft_strcmp( weight, "Black" ) )
              flags |= FT_STYLE_FLAG_BOLD;
        }

        /* double check */
        if ( !(flags & FT_STYLE_FLAG_BOLD) && cffface->style_name )
          if ( !ft_strncmp( cffface->style_name, "Bold", 4 )  ||
               !ft_strncmp( cffface->style_name, "Black", 5 ) )
            flags |= FT_STYLE_FLAG_BOLD;

        cffface->style_flags = flags;
      }


#ifndef FT_CONFIG_OPTION_NO_GLYPH_NAMES
      /* CID-keyed CFF fonts don't have glyph names -- the SFNT loader */
      /* has unset this flag because of the 3.0 `post' table.          */
      if ( dict->cid_registry == 0xFFFFU )
        cffface->face_flags |= FT_FACE_FLAG_GLYPH_NAMES;
#endif

      if ( dict->cid_registry != 0xFFFFU && pure_cff )
        cffface->face_flags |= FT_FACE_FLAG_CID_KEYED;


      /*******************************************************************/
      /*                                                                 */
      /* Compute char maps.                                              */
      /*                                                                 */

      /* Try to synthesize a Unicode charmap if there is none available */
      /* already.  If an OpenType font contains a Unicode "cmap", we    */
      /* will use it, whatever be in the CFF part of the file.          */
      {
        FT_CharMapRec  cmaprec;
        FT_CharMap     cmap;
        FT_UInt        nn;
        CFF_Encoding   encoding = &cff->encoding;


        for ( nn = 0; nn < (FT_UInt)cffface->num_charmaps; nn++ )
        {
          cmap = cffface->charmaps[nn];

          /* Windows Unicode? */
          if ( cmap->platform_id == TT_PLATFORM_MICROSOFT &&
               cmap->encoding_id == TT_MS_ID_UNICODE_CS   )
            goto Skip_Unicode;

          /* Apple Unicode platform id? */
          if ( cmap->platform_id == TT_PLATFORM_APPLE_UNICODE )
            goto Skip_Unicode; /* Apple Unicode */
        }

        /* since CID-keyed fonts don't contain glyph names, we can't */
        /* construct a cmap                                          */
        if ( pure_cff && cff->top_font.font_dict.cid_registry != 0xFFFFU )
          goto Exit;

#ifdef FT_MAX_CHARMAP_CACHEABLE
        if ( nn + 1 > FT_MAX_CHARMAP_CACHEABLE )
        {
          FT_ERROR(( "cff_face_init: no Unicode cmap is found, "
                     "and too many subtables (%d) to add synthesized cmap\n",
                     nn ));
          goto Exit;
        }
#endif

        /* we didn't find a Unicode charmap -- synthesize one */
        cmaprec.face        = cffface;
        cmaprec.platform_id = TT_PLATFORM_MICROSOFT;
        cmaprec.encoding_id = TT_MS_ID_UNICODE_CS;
        cmaprec.encoding    = FT_ENCODING_UNICODE;

        nn = (FT_UInt)cffface->num_charmaps;

        error = FT_CMap_New( &CFF_CMAP_UNICODE_CLASS_REC_GET, NULL,
                             &cmaprec, NULL );
        if ( error                                      &&
             FT_ERR_NEQ( error, No_Unicode_Glyph_Name ) )
          goto Exit;
        error = FT_Err_Ok;

        /* if no Unicode charmap was previously selected, select this one */
        if ( cffface->charmap == NULL && nn != (FT_UInt)cffface->num_charmaps )
          cffface->charmap = cffface->charmaps[nn];

      Skip_Unicode:
#ifdef FT_MAX_CHARMAP_CACHEABLE
        if ( nn > FT_MAX_CHARMAP_CACHEABLE )
        {
          FT_ERROR(( "cff_face_init: Unicode cmap is found, "
                     "but too many preceding subtables (%d) to access\n",
                     nn - 1 ));
          goto Exit;
        }
#endif
        if ( encoding->count > 0 )
        {
          FT_CMap_Class  clazz;


          cmaprec.face        = cffface;
          cmaprec.platform_id = TT_PLATFORM_ADOBE;  /* Adobe platform id */

          if ( encoding->offset == 0 )
          {
            cmaprec.encoding_id = TT_ADOBE_ID_STANDARD;
            cmaprec.encoding    = FT_ENCODING_ADOBE_STANDARD;
            clazz               = &CFF_CMAP_ENCODING_CLASS_REC_GET;
          }
          else if ( encoding->offset == 1 )
          {
            cmaprec.encoding_id = TT_ADOBE_ID_EXPERT;
            cmaprec.encoding    = FT_ENCODING_ADOBE_EXPERT;
            clazz               = &CFF_CMAP_ENCODING_CLASS_REC_GET;
          }
          else
          {
            cmaprec.encoding_id = TT_ADOBE_ID_CUSTOM;
            cmaprec.encoding    = FT_ENCODING_ADOBE_CUSTOM;
            clazz               = &CFF_CMAP_ENCODING_CLASS_REC_GET;
          }

          error = FT_CMap_New( clazz, NULL, &cmaprec, NULL );
        }
      }
    }

  Exit:
    return error;
  }
Beispiel #8
0
  static FT_Error
  cff_subfont_load( CFF_SubFont  font,
                    CFF_Index    idx,
                    FT_UInt      font_index,
                    FT_Stream    stream,
                    FT_ULong     base_offset )
  {
    FT_Error         error;
    CFF_ParserRec    parser;
    FT_Byte*         dict = NULL;
    FT_ULong         dict_len;
    CFF_FontRecDict  top  = &font->font_dict;
    CFF_Private      priv = &font->private_dict;


    cff_parser_init( &parser, CFF_CODE_TOPDICT, &font->font_dict );

    /* set defaults */
    FT_MEM_ZERO( top, sizeof ( *top ) );

    top->underline_position  = -100L << 16;
    top->underline_thickness = 50L << 16;
    top->charstring_type     = 2;
    top->font_matrix.xx      = 0x10000L;
    top->font_matrix.yy      = 0x10000L;
    top->cid_count           = 8720;

    /* we use the implementation specific SID value 0xFFFF to indicate */
    /* missing entries                                                 */
    top->version             = 0xFFFFU;
    top->notice              = 0xFFFFU;
    top->copyright           = 0xFFFFU;
    top->full_name           = 0xFFFFU;
    top->family_name         = 0xFFFFU;
    top->weight              = 0xFFFFU;
    top->embedded_postscript = 0xFFFFU;

    top->cid_registry        = 0xFFFFU;
    top->cid_ordering        = 0xFFFFU;
    top->cid_font_name       = 0xFFFFU;

    error = cff_index_access_element( idx, font_index, &dict, &dict_len );
    if ( !error )
      error = cff_parser_run( &parser, dict, dict + dict_len );

    cff_index_forget_element( idx, &dict );

    if ( error )
      goto Exit;

    /* if it is a CID font, we stop there */
    if ( top->cid_registry != 0xFFFFU )
      goto Exit;

    /* parse the private dictionary, if any */
    if ( top->private_offset && top->private_size )
    {
      /* set defaults */
      FT_MEM_ZERO( priv, sizeof ( *priv ) );

      priv->blue_shift       = 7;
      priv->blue_fuzz        = 1;
      priv->lenIV            = -1;
      priv->expansion_factor = (FT_Fixed)( 0.06 * 0x10000L );
      priv->blue_scale       = (FT_Fixed)( 0.039625 * 0x10000L * 1000 );

      cff_parser_init( &parser, CFF_CODE_PRIVATE, priv );

      if ( FT_STREAM_SEEK( base_offset + font->font_dict.private_offset ) ||
           FT_FRAME_ENTER( font->font_dict.private_size )                 )
        goto Exit;

      error = cff_parser_run( &parser,
                              (FT_Byte*)stream->cursor,
                              (FT_Byte*)stream->limit );
      FT_FRAME_EXIT();
      if ( error )
        goto Exit;

      /* ensure that `num_blue_values' is even */
      priv->num_blue_values &= ~1;
    }

    /* read the local subrs, if any */
    if ( priv->local_subrs_offset )
    {
      if ( FT_STREAM_SEEK( base_offset + top->private_offset +
                           priv->local_subrs_offset ) )
        goto Exit;

      error = cff_index_init( &font->local_subrs_index, stream, 1 );
      if ( error )
        goto Exit;

      font->num_local_subrs = font->local_subrs_index.count;
      error = cff_index_get_pointers( &font->local_subrs_index,
                                      &font->local_subrs );
      if ( error )
        goto Exit;
    }

  Exit:
    return error;
  }
Beispiel #9
0
  cff_index_access_element( CFF_Index  idx,
                            FT_UInt    element,
                            FT_Byte**  pbytes,
                            FT_ULong*  pbyte_len )
  {
    FT_Error  error = CFF_Err_Ok;


    if ( idx && idx->count > element )
    {
      /* compute start and end offsets */
      FT_Stream  stream = idx->stream;
      FT_ULong   off1, off2 = 0;


      /* load offsets from file or the offset table */
      if ( !idx->offsets )
      {
        FT_ULong  pos = element * idx->off_size;


        if ( FT_STREAM_SEEK( idx->start + 3 + pos ) )
          goto Exit;

        off1 = cff_index_read_offset( idx, &error );
        if ( error )
          goto Exit;

        if ( off1 != 0 )
        {
          do
          {
            element++;
            off2 = cff_index_read_offset( idx, &error );
          }
          while ( off2 == 0 && element < idx->count );
        }
      }
      else   /* use offsets table */
      {
        off1 = idx->offsets[element];
        if ( off1 )
        {
          do
          {
            element++;
            off2 = idx->offsets[element];

          } while ( off2 == 0 && element < idx->count );
        }
      }

      /* access element */
      if ( off1 && off2 > off1 )
      {
        *pbyte_len = off2 - off1;

        if ( idx->bytes )
        {
          /* this index was completely loaded in memory, that's easy */
          *pbytes = idx->bytes + off1 - 1;
        }
        else
        {
          /* this index is still on disk/file, access it through a frame */
          if ( FT_STREAM_SEEK( idx->data_offset + off1 - 1 ) ||
               FT_FRAME_EXTRACT( off2 - off1, *pbytes )      )
            goto Exit;
        }
      }
      else
      {
        /* empty index element */
        *pbytes    = 0;
        *pbyte_len = 0;
      }
    }
    else
      error = CFF_Err_Invalid_Argument;

  Exit:
    return error;
  }
Beispiel #10
0
  pfr_face_get_kerning( PFR_Face    face,
                        FT_UInt     glyph1,
                        FT_UInt     glyph2,
                        FT_Vector*  kerning )
  {
    FT_Error      error;
    PFR_PhyFont   phy_font = &face->phy_font;
    PFR_KernItem  item     = phy_font->kern_items;
    FT_UInt32     idx      = PFR_KERN_INDEX( glyph1, glyph2 );


    kerning->x = 0;
    kerning->y = 0;

    /* find the kerning item containing our pair */
    while ( item )
    {
      if ( item->pair1 <= idx && idx <= item->pair2 )
        goto Found_Item;

      item = item->next;
    }

    /* not found */
    goto Exit;

  Found_Item:
    {
      /* perform simply binary search within the item */
      FT_UInt    min, mid, max;
      FT_Stream  stream = face->root.stream;
      FT_Byte*   p;


      if ( FT_STREAM_SEEK( item->offset )                       ||
           FT_FRAME_ENTER( item->pair_count * item->pair_size ) )
        goto Exit;

      min = 0;
      max = item->pair_count;
      while ( min < max )
      {
        FT_UInt  char1, char2, charcode;


        mid = ( min + max ) >> 1;
        p   = stream->cursor + mid*item->pair_size;

        if ( item->flags & PFR_KERN_2BYTE_CHAR )
        {
          char1 = FT_NEXT_USHORT( p );
          char2 = FT_NEXT_USHORT( p );
        }
        else
        {
          char1 = FT_NEXT_USHORT( p );
          char2 = FT_NEXT_USHORT( p );
        }
        charcode = PFR_KERN_INDEX( char1, char2 );

        if ( idx == charcode )
        {
          if ( item->flags & PFR_KERN_2BYTE_ADJ )
            kerning->x = item->base_adj + FT_NEXT_SHORT( p );
          else
            kerning->x = item->base_adj + FT_NEXT_CHAR( p );

          break;
        }
        if ( idx > charcode )
          min = mid + 1;
        else
          max = mid;
      }

      FT_FRAME_EXIT();
    }

  Exit:
    return 0;
  }
Beispiel #11
0
pfr_face_get_kerning( FT_Face     pfrface,        /* PFR_Face */
                      FT_UInt     glyph1,
                      FT_UInt     glyph2,
                      FT_Vector*  kerning )
{
    PFR_Face     face     = (PFR_Face)pfrface;
    FT_Error     error    = FT_Err_Ok;
    PFR_PhyFont  phy_font = &face->phy_font;
    FT_UInt32    code1, code2, pair;


    kerning->x = 0;
    kerning->y = 0;

    if ( glyph1 > 0 )
        glyph1--;

    if ( glyph2 > 0 )
        glyph2--;

    /* convert glyph indices to character codes */
    if ( glyph1 > phy_font->num_chars ||
            glyph2 > phy_font->num_chars )
        goto Exit;

    code1 = phy_font->chars[glyph1].char_code;
    code2 = phy_font->chars[glyph2].char_code;
    pair  = PFR_KERN_INDEX( code1, code2 );

    /* now search the list of kerning items */
    {
        PFR_KernItem  item   = phy_font->kern_items;
        FT_Stream     stream = pfrface->stream;


        for ( ; item; item = item->next )
        {
            if ( pair >= item->pair1 && pair <= item->pair2 )
                goto FoundPair;
        }
        goto Exit;

FoundPair: /* we found an item, now parse it and find the value if any */
        if ( FT_STREAM_SEEK( item->offset )                       ||
                FT_FRAME_ENTER( item->pair_count * item->pair_size ) )
            goto Exit;

        {
            FT_UInt    count       = item->pair_count;
            FT_UInt    size        = item->pair_size;
            FT_UInt    power       = 1 << FT_MSB( count );
            FT_UInt    probe       = power * size;
            FT_UInt    extra       = count - power;
            FT_Byte*   base        = stream->cursor;
            FT_Bool    twobytes    = FT_BOOL( item->flags & 1 );
            FT_Bool    twobyte_adj = FT_BOOL( item->flags & 2 );
            FT_Byte*   p;
            FT_UInt32  cpair;


            if ( extra > 0 )
            {
                p = base + extra * size;

                if ( twobytes )
                    cpair = FT_NEXT_ULONG( p );
                else
                    cpair = PFR_NEXT_KPAIR( p );

                if ( cpair == pair )
                    goto Found;

                if ( cpair < pair )
                {
                    if ( twobyte_adj )
                        p += 2;
                    else
                        p++;
                    base = p;
                }
            }

            while ( probe > size )
            {
                probe >>= 1;
                p       = base + probe;

                if ( twobytes )
                    cpair = FT_NEXT_ULONG( p );
                else
                    cpair = PFR_NEXT_KPAIR( p );

                if ( cpair == pair )
                    goto Found;

                if ( cpair < pair )
                    base += probe;
            }

            p = base;

            if ( twobytes )
                cpair = FT_NEXT_ULONG( p );
            else
                cpair = PFR_NEXT_KPAIR( p );

            if ( cpair == pair )
            {
                FT_Int  value;


Found:
                if ( twobyte_adj )
                    value = FT_PEEK_SHORT( p );
                else
                    value = p[0];

                kerning->x = item->base_adj + value;
            }
        }

        FT_FRAME_EXIT();
    }

Exit:
    return error;
}
Beispiel #12
0
tt_face_init( FT_Stream      stream,
              FT_Face        ttface,      /* TT_Face */
              FT_Int         face_index,
              FT_Int         num_params,
              FT_Parameter*  params )
{
    FT_Error      error;
    FT_Library    library;
    SFNT_Service  sfnt;
    TT_Face       face = (TT_Face)ttface;


    FT_TRACE2(( "TTF driver\n" ));

    library = ttface->driver->root.library;

    sfnt = (SFNT_Service)FT_Get_Module_Interface( library, "sfnt" );
    if ( !sfnt )
    {
        FT_ERROR(( "tt_face_init: cannot access `sfnt' module\n" ));
        error = FT_THROW( Missing_Module );
        goto Exit;
    }

    /* create input stream from resource */
    if ( FT_STREAM_SEEK( 0 ) )
        goto Exit;

    /* check that we have a valid TrueType file */
    error = sfnt->init_face( stream, face, face_index, num_params, params );

    /* Stream may have changed. */
    stream = face->root.stream;

    if ( error )
        goto Exit;

    /* We must also be able to accept Mac/GX fonts, as well as OT ones. */
    /* The 0x00020000 tag is completely undocumented; some fonts from   */
    /* Arphic made for Chinese Windows 3.1 have this.                   */
    if ( face->format_tag != 0x00010000L &&    /* MS fonts  */
            face->format_tag != 0x00020000L &&    /* CJK fonts for Win 3.1 */
            face->format_tag != TTAG_true   )     /* Mac fonts */
    {
        FT_TRACE2(( "  not a TTF font\n" ));
        goto Bad_Format;
    }

#ifdef TT_USE_BYTECODE_INTERPRETER
    ttface->face_flags |= FT_FACE_FLAG_HINTER;
#endif

    /* If we are performing a simple font format check, exit immediately. */
    if ( face_index < 0 )
        return FT_Err_Ok;

    /* Load font directory */
    error = sfnt->load_face( stream, face, face_index, num_params, params );
    if ( error )
        goto Exit;

    if ( tt_check_trickyness( ttface ) )
        ttface->face_flags |= FT_FACE_FLAG_TRICKY;

    error = tt_face_load_hdmx( face, stream );
    if ( error )
        goto Exit;

    if ( FT_IS_SCALABLE( ttface ) )
    {

#ifdef FT_CONFIG_OPTION_INCREMENTAL

        if ( !ttface->internal->incremental_interface )
            error = tt_face_load_loca( face, stream );
        if ( !error )
            error = tt_face_load_cvt( face, stream );
        if ( !error )
            error = tt_face_load_fpgm( face, stream );
        if ( !error )
            error = tt_face_load_prep( face, stream );

        /* Check the scalable flag based on `loca'. */
        if ( !ttface->internal->incremental_interface &&
                ttface->num_fixed_sizes                  &&
                face->glyph_locations                    &&
                tt_check_single_notdef( ttface )         )
        {
            FT_TRACE5(( "tt_face_init:"
                        " Only the `.notdef' glyph has an outline.\n"
                        "             "
                        " Resetting scalable flag to FALSE.\n" ));

            ttface->face_flags &= ~FT_FACE_FLAG_SCALABLE;
        }

#else /* !FT_CONFIG_OPTION_INCREMENTAL */

        if ( !error )
            error = tt_face_load_loca( face, stream );
        if ( !error )
            error = tt_face_load_cvt( face, stream );
        if ( !error )
            error = tt_face_load_fpgm( face, stream );
        if ( !error )
            error = tt_face_load_prep( face, stream );

        /* Check the scalable flag based on `loca'. */
        if ( ttface->num_fixed_sizes          &&
                face->glyph_locations            &&
                tt_check_single_notdef( ttface ) )
        {
            FT_TRACE5(( "tt_face_init:"
                        " Only the `.notdef' glyph has an outline.\n"
                        "             "
                        " Resetting scalable flag to FALSE.\n" ));

            ttface->face_flags &= ~FT_FACE_FLAG_SCALABLE;
        }

#endif /* !FT_CONFIG_OPTION_INCREMENTAL */

    }

#ifdef TT_CONFIG_OPTION_GX_VAR_SUPPORT

    {
        FT_Int  instance_index = face_index >> 16;


        if ( FT_HAS_MULTIPLE_MASTERS( ttface ) &&
                instance_index > 0                )
        {
            error = TT_Get_MM_Var( face, NULL );
            if ( error )
                goto Exit;

            if ( face->blend->mmvar->namedstyle )
            {
                FT_Memory  memory = ttface->memory;

                FT_Var_Named_Style*  named_style;
                FT_String*           style_name;


                /* in `face_index', the instance index starts with value 1 */
                named_style = face->blend->mmvar->namedstyle + instance_index - 1;
                error = sfnt->get_name( face,
                                        (FT_UShort)named_style->strid,
                                        &style_name );
                if ( error )
                    goto Exit;

                /* set style name; if already set, replace it */
                if ( face->root.style_name )
                    FT_FREE( face->root.style_name );
                face->root.style_name = style_name;

                /* finally, select the named instance */
                error = TT_Set_Var_Design( face,
                                           face->blend->mmvar->num_axis,
                                           named_style->coords );
                if ( error )
                    goto Exit;
            }
        }
    }

#endif /* TT_CONFIG_OPTION_GX_VAR_SUPPORT */

    /* initialize standard glyph loading routines */
    TT_Init_Glyph_Loading( face );

Exit:
    return error;

Bad_Format:
    error = FT_THROW( Unknown_File_Format );
    goto Exit;
}
Beispiel #13
0
  t42_parser_init( T42_Parser     parser,
                   FT_Stream      stream,
                   FT_Memory      memory,
                   PSAux_Service  psaux )
  {
    FT_Error  error = FT_Err_Ok;
    FT_Long   size;


    psaux->ps_parser_funcs->init( &parser->root, 0, 0, memory );

    parser->stream    = stream;
    parser->base_len  = 0;
    parser->base_dict = 0;
    parser->in_memory = 0;

    /*******************************************************************/
    /*                                                                 */
    /* Here a short summary of what is going on:                       */
    /*                                                                 */
    /*   When creating a new Type 42 parser, we try to locate and load */
    /*   the base dictionary, loading the whole font into memory.      */
    /*                                                                 */
    /*   When `loading' the base dictionary, we only set up pointers   */
    /*   in the case of a memory-based stream.  Otherwise, we allocate */
    /*   and load the base dictionary in it.                           */
    /*                                                                 */
    /*   parser->in_memory is set if we have a memory stream.          */
    /*                                                                 */

    if ( FT_STREAM_SEEK( 0L ) ||
         FT_FRAME_ENTER( 17 ) )
      goto Exit;

    if ( ft_memcmp( stream->cursor, "%!PS-TrueTypeFont", 17 ) != 0 )
    {
      FT_TRACE2(( "  not a Type42 font\n" ));
      error = FT_THROW( Unknown_File_Format );
    }

    FT_FRAME_EXIT();

    if ( error || FT_STREAM_SEEK( 0 ) )
      goto Exit;

    size = stream->size;

    /* now, try to load `size' bytes of the `base' dictionary we */
    /* found previously                                          */

    /* if it is a memory-based resource, set up pointers */
    if ( !stream->read )
    {
      parser->base_dict = (FT_Byte*)stream->base + stream->pos;
      parser->base_len  = size;
      parser->in_memory = 1;

      /* check that the `size' field is valid */
      if ( FT_STREAM_SKIP( size ) )
        goto Exit;
    }
    else
    {
      /* read segment in memory */
      if ( FT_ALLOC( parser->base_dict, size )       ||
           FT_STREAM_READ( parser->base_dict, size ) )
        goto Exit;

      parser->base_len = size;
    }

    parser->root.base   = parser->base_dict;
    parser->root.cursor = parser->base_dict;
    parser->root.limit  = parser->root.cursor + parser->base_len;

  Exit:
    if ( error && !parser->in_memory )
      FT_FREE( parser->base_dict );

    return error;
  }
Beispiel #14
0
  cff_index_access_element( CFF_Index  idx,
                            FT_UInt    element,
                            FT_Byte**  pbytes,
                            FT_ULong*  pbyte_len )
  {
    FT_Error  error = FT_Err_Ok;


    if ( idx && idx->count > element )
    {
      /* compute start and end offsets */
      FT_Stream  stream = idx->stream;
      FT_ULong   off1, off2 = 0;


      /* load offsets from file or the offset table */
      if ( !idx->offsets )
      {
        FT_ULong  pos = element * idx->off_size;


        if ( FT_STREAM_SEEK( idx->start + 3 + pos ) )
          goto Exit;

        off1 = cff_index_read_offset( idx, &error );
        if ( error )
          goto Exit;

        if ( off1 != 0 )
        {
          do
          {
            element++;
            off2 = cff_index_read_offset( idx, &error );
          }
          while ( off2 == 0 && element < idx->count );
        }
      }
      else   /* use offsets table */
      {
        off1 = idx->offsets[element];
        if ( off1 )
        {
          do
          {
            element++;
            off2 = idx->offsets[element];

          } while ( off2 == 0 && element < idx->count );
        }
      }

      /* XXX: should check off2 does not exceed the end of this entry; */
      /*      at present, only truncate off2 at the end of this stream */
      if ( off2 > stream->size + 1                    ||
           idx->data_offset > stream->size - off2 + 1 )
      {
        FT_ERROR(( "cff_index_access_element:"
                   " offset to next entry (%d)"
                   " exceeds the end of stream (%d)\n",
                   off2, stream->size - idx->data_offset + 1 ));
        off2 = stream->size - idx->data_offset + 1;
      }

      /* access element */
      if ( off1 && off2 > off1 )
      {
        *pbyte_len = off2 - off1;

        if ( idx->bytes )
        {
          /* this index was completely loaded in memory, that's easy */
          *pbytes = idx->bytes + off1 - 1;
        }
        else
        {
          /* this index is still on disk/file, access it through a frame */
          if ( FT_STREAM_SEEK( idx->data_offset + off1 - 1 ) ||
               FT_FRAME_EXTRACT( off2 - off1, *pbytes )      )
            goto Exit;
        }
      }
      else
      {
        /* empty index element */
        *pbytes    = 0;
        *pbyte_len = 0;
      }
    }
    else
      error = FT_THROW( Invalid_Argument );

  Exit:
    return error;
  }
Beispiel #15
0
  static FT_Error
  pfr_sort_kerning_pairs( FT_Stream    stream,
                          PFR_PhyFont  phy_font )
  {
    FT_Error      error;
    FT_Memory     memory = stream->memory;
    PFR_KernPair  pairs;
    PFR_KernItem  item;
    PFR_Char      chars     = phy_font->chars;
    FT_UInt       num_chars = phy_font->num_chars;
    FT_UInt       count;


   /* create kerning pairs array
    */
    if ( FT_NEW_ARRAY( phy_font->kern_pairs, phy_font->num_kern_pairs ) )
      goto Exit;

   /* load all kerning items into the array,
    * converting character codes into glyph indices
    */
    pairs = phy_font->kern_pairs;
    item  = phy_font->kern_items;
    count = 0;

    for ( ; item; item = item->next )
    {
      FT_UInt   limit = count + item->pair_count;
      FT_Byte*  p;


      if ( limit > phy_font->num_kern_pairs )
      {
        error = PFR_Err_Invalid_Table;
        goto Exit;
      }

      if ( FT_STREAM_SEEK( item->offset )                       ||
           FT_FRAME_ENTER( item->pair_count * item->pair_size ) )
        goto Exit;

      p = stream->cursor;

      for ( ; count < limit; count++ )
      {
        PFR_KernPair  pair = pairs + count;
        FT_UInt       char1, char2;
        FT_Int        kerning;


        if ( item->flags & PFR_KERN_2BYTE_CHAR )
        {
          char1 = FT_NEXT_USHORT( p );
          char2 = FT_NEXT_USHORT( p );
        }
        else
        {
          char1 = FT_NEXT_BYTE( p );
          char2 = FT_NEXT_BYTE( p );
        }

        if ( item->flags & PFR_KERN_2BYTE_ADJ )
          kerning = item->base_adj + FT_NEXT_SHORT( p );
        else
          kerning = item->base_adj + FT_NEXT_CHAR( p );

        pair->glyph1  = pfr_get_gindex( chars, num_chars, char1 );
        pair->glyph2  = pfr_get_gindex( chars, num_chars, char2 );
        pair->kerning = kerning;
      }

      FT_FRAME_EXIT();
    }

   /* sort the resulting array
    */
    ft_qsort( pairs, count,
              sizeof ( PFR_KernPairRec ),
              pfr_compare_kern_pairs );

  Exit:
    if ( error )
    {
     /* disable kerning data in case of error
      */
      phy_font->num_kern_pairs = 0;
    }

    return error;
  }
Beispiel #16
0
  static FT_Error
  pcf_read_TOC( FT_Stream  stream,
                PCF_Face   face )
  {
    FT_Error   error;
    PCF_Toc    toc = &face->toc;
    PCF_Table  tables;

    FT_Memory  memory = FT_FACE(face)->memory;
    FT_UInt    n;


    if ( FT_STREAM_SEEK ( 0 )                          ||
         FT_STREAM_READ_FIELDS ( pcf_toc_header, toc ) )
      return PCF_Err_Cannot_Open_Resource;

    if ( toc->version != PCF_FILE_VERSION                 ||
         toc->count   >  FT_ARRAY_MAX( face->toc.tables ) ||
         toc->count   == 0                                )
      return PCF_Err_Invalid_File_Format;

    if ( FT_NEW_ARRAY( face->toc.tables, toc->count ) )
      return PCF_Err_Out_Of_Memory;

    tables = face->toc.tables;
    for ( n = 0; n < toc->count; n++ )
    {
      if ( FT_STREAM_READ_FIELDS( pcf_table_header, tables ) )
        goto Exit;
      tables++;
    }

    /* Sort tables and check for overlaps.  Because they are almost      */
    /* always ordered already, an in-place bubble sort with simultaneous */
    /* boundary checking seems appropriate.                              */
    tables = face->toc.tables;

    for ( n = 0; n < toc->count - 1; n++ )
    {
      FT_UInt  i, have_change;


      have_change = 0;

      for ( i = 0; i < toc->count - 1 - n; i++ )
      {
        PCF_TableRec  tmp;


        if ( tables[i].offset > tables[i + 1].offset )
        {
          tmp           = tables[i];
          tables[i]     = tables[i + 1];
          tables[i + 1] = tmp;

          have_change = 1;
        }

        if ( ( tables[i].size   > tables[i + 1].offset )                  ||
             ( tables[i].offset > tables[i + 1].offset - tables[i].size ) )
          return PCF_Err_Invalid_Offset;
      }

      if ( !have_change )
        break;
    }

#ifdef FT_DEBUG_LEVEL_TRACE

    {
      FT_UInt      i, j;
      const char*  name = "?";


      FT_TRACE4(( "pcf_read_TOC:\n" ));

      FT_TRACE4(( "  number of tables: %ld\n", face->toc.count ));

      tables = face->toc.tables;
      for ( i = 0; i < toc->count; i++ )
      {
        for ( j = 0; j < sizeof ( tableNames ) / sizeof ( tableNames[0] );
              j++ )
          if ( tables[i].type == (FT_UInt)( 1 << j ) )
            name = tableNames[j];

        FT_TRACE4(( "  %d: type=%s, format=0x%X, "
                    "size=%ld (0x%lX), offset=%ld (0x%lX)\n",
                    i, name,
                    tables[i].format,
                    tables[i].size, tables[i].size,
                    tables[i].offset, tables[i].offset ));
      }
    }

#endif

    return PCF_Err_Ok;

  Exit:
    FT_FREE( face->toc.tables );
    return error;
  }
  T1_New_Parser( T1_Parser      parser,
                 FT_Stream      stream,
                 FT_Memory      memory,
                 PSAux_Service  psaux )
  {
    FT_Error   error;
    FT_UShort  tag;
    FT_ULong   size;


    psaux->ps_parser_funcs->init( &parser->root, 0, 0, memory );

    parser->stream       = stream;
    parser->base_len     = 0;
    parser->base_dict    = 0;
    parser->private_len  = 0;
    parser->private_dict = 0;
    parser->in_pfb       = 0;
    parser->in_memory    = 0;
    parser->single_block = 0;

    /* check the header format */
    error = check_type1_format( stream, "%!PS-AdobeFont", 14 );
    if ( error )
    {
      if ( FT_ERR_NEQ( error, Unknown_File_Format ) )
        goto Exit;

      error = check_type1_format( stream, "%!FontType", 10 );
      if ( error )
      {
        FT_TRACE2(( "  not a Type 1 font\n" ));
        goto Exit;
      }
    }

    /******************************************************************/
    /*                                                                */
    /* Here a short summary of what is going on:                      */
    /*                                                                */
    /*   When creating a new Type 1 parser, we try to locate and load */
    /*   the base dictionary if this is possible (i.e., for PFB       */
    /*   files).  Otherwise, we load the whole font into memory.      */
    /*                                                                */
    /*   When `loading' the base dictionary, we only setup pointers   */
    /*   in the case of a memory-based stream.  Otherwise, we         */
    /*   allocate and load the base dictionary in it.                 */
    /*                                                                */
    /*   parser->in_pfb is set if we are in a binary (`.pfb') font.   */
    /*   parser->in_memory is set if we have a memory stream.         */
    /*                                                                */

    /* try to compute the size of the base dictionary;     */
    /* look for a Postscript binary file tag, i.e., 0x8001 */
    if ( FT_STREAM_SEEK( 0L ) )
      goto Exit;

    error = read_pfb_tag( stream, &tag, &size );
    if ( error )
      goto Exit;

    if ( tag != 0x8001U )
    {
      /* assume that this is a PFA file for now; an error will */
      /* be produced later when more things are checked        */
      if ( FT_STREAM_SEEK( 0L ) )
        goto Exit;
      size = stream->size;
    }
    else
      parser->in_pfb = 1;

    /* now, try to load `size' bytes of the `base' dictionary we */
    /* found previously                                          */

    /* if it is a memory-based resource, set up pointers */
    if ( !stream->read )
    {
      parser->base_dict = (FT_Byte*)stream->base + stream->pos;
      parser->base_len  = size;
      parser->in_memory = 1;

      /* check that the `size' field is valid */
      if ( FT_STREAM_SKIP( size ) )
        goto Exit;
    }
    else
    {
      /* read segment in memory -- this is clumsy, but so does the format */
      if ( FT_ALLOC( parser->base_dict, size )       ||
           FT_STREAM_READ( parser->base_dict, size ) )
        goto Exit;
      parser->base_len = size;
    }

    parser->root.base   = parser->base_dict;
    parser->root.cursor = parser->base_dict;
    parser->root.limit  = parser->root.cursor + parser->base_len;

  Exit:
    if ( error && !parser->in_memory )
      FT_FREE( parser->base_dict );

    return error;
  }
Beispiel #18
0
  static FT_String*
  tt_face_get_name( TT_Face    face,
                    FT_UShort  nameid )
  {
    FT_Memory         memory = face->root.memory;
    FT_String*        result = NULL;
    FT_UShort         n;
    TT_NameEntryRec*  rec;
    FT_Int            found_apple   = -1;
    FT_Int            found_win     = -1;
    FT_Int            found_unicode = -1;

    FT_Bool           is_english = 0;

    TT_NameEntry_ConvertFunc  convert;


    rec = face->name_table.names;
    for ( n = 0; n < face->num_names; n++, rec++ )
    {
      /* According to the OpenType 1.3 specification, only Microsoft or  */
      /* Apple platform IDs might be used in the `name' table.  The      */
      /* `Unicode' platform is reserved for the `cmap' table, and the    */
      /* `Iso' one is deprecated.                                        */
      /*                                                                 */
      /* However, the Apple TrueType specification doesn't say the same  */
      /* thing and goes to suggest that all Unicode `name' table entries */
      /* should be coded in UTF-16 (in big-endian format I suppose).     */
      /*                                                                 */
      if ( rec->nameID == nameid && rec->stringLength > 0 )
      {
        switch ( rec->platformID )
        {
        case TT_PLATFORM_APPLE_UNICODE:
        case TT_PLATFORM_ISO:
          /* there is `languageID' to check there.  We should use this */
          /* field only as a last solution when nothing else is        */
          /* available.                                                */
          /*                                                           */
          found_unicode = n;
          break;

        case TT_PLATFORM_MACINTOSH:
          if ( rec->languageID == TT_MAC_LANGID_ENGLISH )
            found_apple = n;

          break;

        case TT_PLATFORM_MICROSOFT:
          /* we only take a non-English name when there is nothing */
          /* else available in the font                            */
          /*                                                       */
          if ( found_win == -1 || ( rec->languageID & 0x3FF ) == 0x009 )
          {
            switch ( rec->encodingID )
            {
            case TT_MS_ID_SYMBOL_CS:
            case TT_MS_ID_UNICODE_CS:
            case TT_MS_ID_UCS_4:
              is_english = FT_BOOL( ( rec->languageID & 0x3FF ) == 0x009 );
              found_win  = n;
              break;

            default:
              ;
            }
          }
          break;

        default:
          ;
        }
      }
    }

    /* some fonts contain invalid Unicode or Macintosh formatted entries; */
    /* we will thus favor names encoded in Windows formats if available   */
    /* (provided it is an English name)                                   */
    /*                                                                    */
    convert = NULL;
    if ( found_win >= 0 && !( found_apple >= 0 && !is_english ) )
    {
      rec = face->name_table.names + found_win;
      switch ( rec->encodingID )
      {
      case TT_MS_ID_UNICODE_CS:
      case TT_MS_ID_SYMBOL_CS:
        convert = tt_name_entry_ascii_from_utf16;
        break;

      case TT_MS_ID_UCS_4:
        convert = tt_name_entry_ascii_from_ucs4;
        break;

      default:
        ;
      }
    }
    else if ( found_apple >= 0 )
    {
      rec     = face->name_table.names + found_apple;
      convert = tt_name_entry_ascii_from_other;
    }
    else if ( found_unicode >= 0 )
    {
      rec     = face->name_table.names + found_unicode;
      convert = tt_name_entry_ascii_from_utf16;
    }

    if ( rec && convert )
    {
      if ( rec->string == NULL )
      {
        FT_Error   error  = SFNT_Err_Ok;
        FT_Stream  stream = face->name_table.stream;

        FT_UNUSED( error );


        if ( FT_QNEW_ARRAY ( rec->string, rec->stringLength ) ||
             FT_STREAM_SEEK( rec->stringOffset )              ||
             FT_STREAM_READ( rec->string, rec->stringLength ) )
        {
          FT_FREE( rec->string );
          rec->stringLength = 0;
          result            = NULL;
          goto Exit;
        }
      }

      result = convert( rec, memory );
    }

  Exit:
    return result;
  }
  T1_Get_Private_Dict( T1_Parser      parser,
                       PSAux_Service  psaux )
  {
    FT_Stream  stream = parser->stream;
    FT_Memory  memory = parser->root.memory;
    FT_Error   error  = FT_Err_Ok;
    FT_ULong   size;


    if ( parser->in_pfb )
    {
      /* in the case of the PFB format, the private dictionary can be  */
      /* made of several segments.  We thus first read the number of   */
      /* segments to compute the total size of the private dictionary  */
      /* then re-read them into memory.                                */
      FT_Long    start_pos = FT_STREAM_POS();
      FT_UShort  tag;


      parser->private_len = 0;
      for (;;)
      {
        error = read_pfb_tag( stream, &tag, &size );
        if ( error )
          goto Fail;

        if ( tag != 0x8002U )
          break;

        parser->private_len += size;

        if ( FT_STREAM_SKIP( size ) )
          goto Fail;
      }

      /* Check that we have a private dictionary there */
      /* and allocate private dictionary buffer        */
      if ( parser->private_len == 0 )
      {
        FT_ERROR(( "T1_Get_Private_Dict:"
                   " invalid private dictionary section\n" ));
        error = FT_THROW( Invalid_File_Format );
        goto Fail;
      }

      if ( FT_STREAM_SEEK( start_pos )                           ||
           FT_ALLOC( parser->private_dict, parser->private_len ) )
        goto Fail;

      parser->private_len = 0;
      for (;;)
      {
        error = read_pfb_tag( stream, &tag, &size );
        if ( error || tag != 0x8002U )
        {
          error = FT_Err_Ok;
          break;
        }

        if ( FT_STREAM_READ( parser->private_dict + parser->private_len,
                             size ) )
          goto Fail;

        parser->private_len += size;
      }
    }
    else
    {
      /* We have already `loaded' the whole PFA font file into memory; */
      /* if this is a memory resource, allocate a new block to hold    */
      /* the private dict.  Otherwise, simply overwrite into the base  */
      /* dictionary block in the heap.                                 */

      /* first of all, look at the `eexec' keyword */
      FT_Byte*  cur   = parser->base_dict;
      FT_Byte*  limit = cur + parser->base_len;
      FT_Byte   c;


    Again:
      for (;;)
      {
        c = cur[0];
        if ( c == 'e' && cur + 9 < limit )  /* 9 = 5 letters for `eexec' + */
                                            /* whitespace + 4 chars        */
        {
          if ( cur[1] == 'e' &&
               cur[2] == 'x' &&
               cur[3] == 'e' &&
               cur[4] == 'c' )
            break;
        }
        cur++;
        if ( cur >= limit )
        {
          FT_ERROR(( "T1_Get_Private_Dict:"
                     " could not find `eexec' keyword\n" ));
          error = FT_THROW( Invalid_File_Format );
          goto Exit;
        }
      }

      /* check whether `eexec' was real -- it could be in a comment */
      /* or string (as e.g. in u003043t.gsf from ghostscript)       */

      parser->root.cursor = parser->base_dict;
      /* set limit to `eexec' + whitespace + 4 characters */
      parser->root.limit  = cur + 10;

      cur   = parser->root.cursor;
      limit = parser->root.limit;

      while ( cur < limit )
      {
        if ( *cur == 'e' && ft_strncmp( (char*)cur, "eexec", 5 ) == 0 )
          goto Found;

        T1_Skip_PS_Token( parser );
        if ( parser->root.error )
          break;
        T1_Skip_Spaces  ( parser );
        cur = parser->root.cursor;
      }

      /* we haven't found the correct `eexec'; go back and continue */
      /* searching                                                  */

      cur   = limit;
      limit = parser->base_dict + parser->base_len;
      goto Again;

      /* now determine where to write the _encrypted_ binary private  */
      /* dictionary.  We overwrite the base dictionary for disk-based */
      /* resources and allocate a new block otherwise                 */

    Found:
      parser->root.limit = parser->base_dict + parser->base_len;

      T1_Skip_PS_Token( parser );
      cur   = parser->root.cursor;
      limit = parser->root.limit;

      /* according to the Type1 spec, the first cipher byte must not be  */
      /* an ASCII whitespace character code (blank, tab, carriage return */
      /* or line feed).  We have seen Type 1 fonts with two line feed    */
      /* characters...  So skip now all whitespace character codes.      */
      /* SumatraPDF: stop at \r if it's not used for EOL - cf. https://code.google.com/p/sumatrapdf/issues/detail?id=2408 */
      c = !memchr(cur, '\n', limit - cur) || memchr(cur, '\n', limit - cur) > memchr(cur, '\r', limit - cur);
      while ( cur < limit       &&
              ( *cur == ' '  ||
                *cur == '\t' ||
                ( c && *cur == '\r' ) ||
                *cur == '\n' ) )
        ++cur;
      if ( cur >= limit )
      {
        FT_ERROR(( "T1_Get_Private_Dict:"
                   " `eexec' not properly terminated\n" ));
        error = FT_THROW( Invalid_File_Format );
        goto Exit;
      }

      size = (FT_ULong)( parser->base_len - ( cur - parser->base_dict ) );

      if ( parser->in_memory )
      {
        /* note that we allocate one more byte to put a terminating `0' */
        if ( FT_ALLOC( parser->private_dict, size + 1 ) )
          goto Fail;
        parser->private_len = size;
      }
      else
      {
        parser->single_block = 1;
        parser->private_dict = parser->base_dict;
        parser->private_len  = size;
        parser->base_dict    = 0;
        parser->base_len     = 0;
      }

      /* now determine whether the private dictionary is encoded in binary */
      /* or hexadecimal ASCII format -- decode it accordingly              */

      /* we need to access the next 4 bytes (after the final whitespace */
      /* following the `eexec' keyword); if they all are hexadecimal    */
      /* digits, then we have a case of ASCII storage                   */

      if ( cur + 3 < limit                                &&
           ft_isxdigit( cur[0] ) && ft_isxdigit( cur[1] ) &&
           ft_isxdigit( cur[2] ) && ft_isxdigit( cur[3] ) )
      {
        /* ASCII hexadecimal encoding */
        FT_Long  len;


        parser->root.cursor = cur;
        (void)psaux->ps_parser_funcs->to_bytes( &parser->root,
                                                parser->private_dict,
                                                parser->private_len,
                                                &len,
                                                0 );
        parser->private_len = len;

        /* put a safeguard */
        parser->private_dict[len] = '\0';
      }
      else
        /* binary encoding -- copy the private dict */
        FT_MEM_MOVE( parser->private_dict, cur, size );
    }

    /* we now decrypt the encoded binary private dictionary */
    psaux->t1_decrypt( parser->private_dict, parser->private_len, 55665U );

    if ( parser->private_len < 4 )
    {
      FT_ERROR(( "T1_Get_Private_Dict:"
                 " invalid private dictionary section\n" ));
      error = FT_THROW( Invalid_File_Format );
      goto Fail;
    }

    /* replace the four random bytes at the beginning with whitespace */
    parser->private_dict[0] = ' ';
    parser->private_dict[1] = ' ';
    parser->private_dict[2] = ' ';
    parser->private_dict[3] = ' ';

    parser->root.base   = parser->private_dict;
    parser->root.cursor = parser->private_dict;
    parser->root.limit  = parser->root.cursor + parser->private_len;

  Fail:
  Exit:
    return error;
  }
Beispiel #20
0
  static FT_Error
  cff_encoding_load( CFF_Encoding  encoding,
                     CFF_Charset   charset,
                     FT_UInt       num_glyphs,
                     FT_Stream     stream,
                     FT_ULong      base_offset,
                     FT_ULong      offset )
  {
    FT_Error   error = CFF_Err_Ok;
    FT_UInt    count;
    FT_UInt    j;
    FT_UShort  glyph_sid;
    FT_UInt    glyph_code;


    /* Check for charset->sids.  If we do not have this, we fail. */
    if ( !charset->sids )
    {
      error = CFF_Err_Invalid_File_Format;
      goto Exit;
    }

    /* Zero out the code to gid/sid mappings. */
    for ( j = 0; j < 256; j++ )
    {
      encoding->sids [j] = 0;
      encoding->codes[j] = 0;
    }

    /* Note: The encoding table in a CFF font is indexed by glyph index;  */
    /* the first encoded glyph index is 1.  Hence, we read the character  */
    /* code (`glyph_code') at index j and make the assignment:            */
    /*                                                                    */
    /*    encoding->codes[glyph_code] = j + 1                             */
    /*                                                                    */
    /* We also make the assignment:                                       */
    /*                                                                    */
    /*    encoding->sids[glyph_code] = charset->sids[j + 1]               */
    /*                                                                    */
    /* This gives us both a code to GID and a code to SID mapping.        */

    if ( offset > 1 )
    {
      encoding->offset = base_offset + offset;

      /* we need to parse the table to determine its size */
      if ( FT_STREAM_SEEK( encoding->offset ) ||
           FT_READ_BYTE( encoding->format )   ||
           FT_READ_BYTE( count )              )
        goto Exit;

      switch ( encoding->format & 0x7F )
      {
      case 0:
        {
          FT_Byte*  p;


          /* By convention, GID 0 is always ".notdef" and is never */
          /* coded in the font.  Hence, the number of codes found  */
          /* in the table is `count+1'.                            */
          /*                                                       */
          encoding->count = count + 1;

          if ( FT_FRAME_ENTER( count ) )
            goto Exit;

          p = (FT_Byte*)stream->cursor;

          for ( j = 1; j <= count; j++ )
          {
            glyph_code = *p++;

            /* Make sure j is not too big. */
            if ( j < num_glyphs )
            {
              /* Assign code to GID mapping. */
              encoding->codes[glyph_code] = (FT_UShort)j;

              /* Assign code to SID mapping. */
              encoding->sids[glyph_code] = charset->sids[j];
            }
          }

          FT_FRAME_EXIT();
        }
        break;

      case 1:
        {
          FT_UInt  nleft;
          FT_UInt  i = 1;
          FT_UInt  k;


          encoding->count = 0;

          /* Parse the Format1 ranges. */
          for ( j = 0;  j < count; j++, i += nleft )
          {
            /* Read the first glyph code of the range. */
            if ( FT_READ_BYTE( glyph_code ) )
              goto Exit;

            /* Read the number of codes in the range. */
            if ( FT_READ_BYTE( nleft ) )
              goto Exit;

            /* Increment nleft, so we read `nleft + 1' codes/sids. */
            nleft++;

            /* compute max number of character codes */
            if ( (FT_UInt)nleft > encoding->count )
              encoding->count = nleft;

            /* Fill in the range of codes/sids. */
            for ( k = i; k < nleft + i; k++, glyph_code++ )
            {
              /* Make sure k is not too big. */
              if ( k < num_glyphs && glyph_code < 256 )
              {
                /* Assign code to GID mapping. */
                encoding->codes[glyph_code] = (FT_UShort)k;

                /* Assign code to SID mapping. */
                encoding->sids[glyph_code] = charset->sids[k];
              }
            }
          }

          /* simple check; one never knows what can be found in a font */
          if ( encoding->count > 256 )
            encoding->count = 256;
        }
        break;

      default:
        FT_ERROR(( "cff_encoding_load: invalid table format!\n" ));
        error = CFF_Err_Invalid_File_Format;
        goto Exit;
      }

      /* Parse supplemental encodings, if any. */
      if ( encoding->format & 0x80 )
      {
        FT_UInt  gindex;


        /* count supplements */
        if ( FT_READ_BYTE( count ) )
          goto Exit;

        for ( j = 0; j < count; j++ )
        {
          /* Read supplemental glyph code. */
          if ( FT_READ_BYTE( glyph_code ) )
            goto Exit;

          /* Read the SID associated with this glyph code. */
          if ( FT_READ_USHORT( glyph_sid ) )
            goto Exit;

          /* Assign code to SID mapping. */
          encoding->sids[glyph_code] = glyph_sid;

          /* First, look up GID which has been assigned to */
          /* SID glyph_sid.                                */
          for ( gindex = 0; gindex < num_glyphs; gindex++ )
          {
            if ( charset->sids[gindex] == glyph_sid )
            {
              encoding->codes[glyph_code] = (FT_UShort)gindex;
              break;
            }
          }
        }
      }
    }
    else
    {
      /* We take into account the fact a CFF font can use a predefined */
      /* encoding without containing all of the glyphs encoded by this */
      /* encoding (see the note at the end of section 12 in the CFF    */
      /* specification).                                               */

      switch ( (FT_UInt)offset )
      {
      case 0:
        /* First, copy the code to SID mapping. */
        FT_ARRAY_COPY( encoding->sids, cff_standard_encoding, 256 );
        goto Populate;

      case 1:
        /* First, copy the code to SID mapping. */
        FT_ARRAY_COPY( encoding->sids, cff_expert_encoding, 256 );

      Populate:
        /* Construct code to GID mapping from code to SID mapping */
        /* and charset.                                           */

        encoding->count = 0;

        error = cff_charset_compute_cids( charset, num_glyphs,
                                          stream->memory );
        if ( error )
          goto Exit;

        for ( j = 0; j < 256; j++ )
        {
          FT_UInt  sid = encoding->sids[j];
          FT_UInt  gid = 0;


          if ( sid )
            gid = cff_charset_cid_to_gindex( charset, sid );

          if ( gid != 0 )
          {
            encoding->codes[j] = (FT_UShort)gid;

            if ( encoding->count < j + 1 )
              encoding->count = j + 1;
          }
          else
          {
            encoding->codes[j] = 0;
            encoding->sids [j] = 0;
          }
        }
        break;

      default:
        FT_ERROR(( "cff_encoding_load: invalid table format!\n" ));
        error = CFF_Err_Invalid_File_Format;
        goto Exit;
      }
    }

  Exit:

    /* Clean up if there was an error. */
    return error;
  }
Beispiel #21
0
  cff_font_load( FT_Stream  stream,
                 FT_Int     face_index,
                 CFF_Font   font,
                 FT_Bool    pure_cff )
  {
    static const FT_Frame_Field  cff_header_fields[] =
    {
#undef  FT_STRUCTURE
#define FT_STRUCTURE  CFF_FontRec

      FT_FRAME_START( 4 ),
        FT_FRAME_BYTE( version_major ),
        FT_FRAME_BYTE( version_minor ),
        FT_FRAME_BYTE( header_size ),
        FT_FRAME_BYTE( absolute_offsize ),
      FT_FRAME_END
    };

    FT_Error         error;
    FT_Memory        memory = stream->memory;
    FT_ULong         base_offset;
    CFF_FontRecDict  dict;


    FT_ZERO( font );

    font->stream = stream;
    font->memory = memory;
    dict         = &font->top_font.font_dict;
    base_offset  = FT_STREAM_POS();

    /* read CFF font header */
    if ( FT_STREAM_READ_FIELDS( cff_header_fields, font ) )
      goto Exit;

    /* check format */
    if ( font->version_major   != 1 ||
         font->header_size      < 4 ||
         font->absolute_offsize > 4 )
    {
      FT_TRACE2(( "[not a CFF font header!]\n" ));
      error = CFF_Err_Unknown_File_Format;
      goto Exit;
    }

    /* skip the rest of the header */
    if ( FT_STREAM_SKIP( font->header_size - 4 ) )
      goto Exit;

    /* read the name, top dict, string and global subrs index */
    if ( FT_SET_ERROR( cff_index_init( &font->name_index,
                                       stream, 0 ) )              ||
         FT_SET_ERROR( cff_index_init( &font->font_dict_index,
                                       stream, 0 ) )              ||
         FT_SET_ERROR( cff_index_init( &font->string_index,
                                       stream, 0 ) )              ||
         FT_SET_ERROR( cff_index_init( &font->global_subrs_index,
                                       stream, 1 ) )              )
      goto Exit;

    /* well, we don't really forget the `disabled' fonts... */
    font->num_faces = font->name_index.count;
    if ( face_index >= (FT_Int)font->num_faces )
    {
      FT_ERROR(( "cff_font_load: incorrect face index = %d\n",
                 face_index ));
      error = CFF_Err_Invalid_Argument;
    }

    /* in case of a font format check, simply exit now */
    if ( face_index < 0 )
      goto Exit;

    /* now, parse the top-level font dictionary */
    error = cff_subfont_load( &font->top_font,
                              &font->font_dict_index,
                              face_index,
                              stream,
                              base_offset );
    if ( error )
      goto Exit;

    if ( FT_STREAM_SEEK( base_offset + dict->charstrings_offset ) )
      goto Exit;

    error = cff_index_init( &font->charstrings_index, stream, 0 );
    if ( error )
      goto Exit;

    /* now, check for a CID font */
    if ( dict->cid_registry != 0xFFFFU )
    {
      CFF_IndexRec  fd_index;
      CFF_SubFont   sub;
      FT_UInt       idx;


      /* this is a CID-keyed font, we must now allocate a table of */
      /* sub-fonts, then load each of them separately              */
      if ( FT_STREAM_SEEK( base_offset + dict->cid_fd_array_offset ) )
        goto Exit;

      error = cff_index_init( &fd_index, stream, 0 );
      if ( error )
        goto Exit;

      if ( fd_index.count > CFF_MAX_CID_FONTS )
      {
        FT_ERROR(( "cff_font_load: FD array too large in CID font\n" ));
        goto Fail_CID;
      }

      /* allocate & read each font dict independently */
      font->num_subfonts = fd_index.count;
      if ( FT_NEW_ARRAY( sub, fd_index.count ) )
        goto Fail_CID;

      /* set up pointer table */
      for ( idx = 0; idx < fd_index.count; idx++ )
        font->subfonts[idx] = sub + idx;

      /* now load each subfont independently */
      for ( idx = 0; idx < fd_index.count; idx++ )
      {
        sub = font->subfonts[idx];
        error = cff_subfont_load( sub, &fd_index, idx,
                                  stream, base_offset );
        if ( error )
          goto Fail_CID;
      }

      /* now load the FD Select array */
      error = CFF_Load_FD_Select( &font->fd_select,
                                  font->charstrings_index.count,
                                  stream,
                                  base_offset + dict->cid_fd_select_offset );

    Fail_CID:
      cff_index_done( &fd_index );

      if ( error )
        goto Exit;
    }
    else
      font->num_subfonts = 0;

    /* read the charstrings index now */
    if ( dict->charstrings_offset == 0 )
    {
      FT_ERROR(( "cff_font_load: no charstrings offset!\n" ));
      error = CFF_Err_Unknown_File_Format;
      goto Exit;
    }

    /* explicit the global subrs */
    font->num_global_subrs = font->global_subrs_index.count;
    font->num_glyphs       = font->charstrings_index.count;

    error = cff_index_get_pointers( &font->global_subrs_index,
                                    &font->global_subrs ) ;

    if ( error )
      goto Exit;

    /* read the Charset and Encoding tables if available */
    if ( font->num_glyphs > 0 )
    {
      FT_Bool  invert = FT_BOOL( dict->cid_registry != 0xFFFFU && pure_cff );


      error = cff_charset_load( &font->charset, font->num_glyphs, stream,
                                base_offset, dict->charset_offset, invert );
      if ( error )
        goto Exit;

      /* CID-keyed CFFs don't have an encoding */
      if ( dict->cid_registry == 0xFFFFU )
      {
        error = cff_encoding_load( &font->encoding,
                                   &font->charset,
                                   font->num_glyphs,
                                   stream,
                                   base_offset,
                                   dict->encoding_offset );
        if ( error )
          goto Exit;
      }
      else
        /* CID-keyed fonts only need CIDs */
        FT_FREE( font->charset.sids );
    }

    /* get the font name (/CIDFontName for CID-keyed fonts, */
    /* /FontName otherwise)                                 */
    font->font_name = cff_index_get_name( &font->name_index, face_index );

  Exit:
    return error;
  }
Beispiel #22
0
  pfr_phy_font_load( PFR_PhyFont  phy_font,
                     FT_Stream    stream,
                     FT_UInt32    offset,
                     FT_UInt32    size )
  {
    FT_Error   error;
    FT_Memory  memory = stream->memory;
    FT_UInt    flags;
    FT_ULong   num_aux;
    FT_Byte*   p;
    FT_Byte*   limit;


    phy_font->memory = memory;
    phy_font->offset = offset;

    phy_font->kern_items      = NULL;
    phy_font->kern_items_tail = &phy_font->kern_items;

    if ( FT_STREAM_SEEK( offset ) ||
         FT_FRAME_ENTER( size )   )
      goto Exit;

    phy_font->cursor = stream->cursor;

    p     = stream->cursor;
    limit = p + size;

    PFR_CHECK( 15 );
    phy_font->font_ref_number    = PFR_NEXT_USHORT( p );
    phy_font->outline_resolution = PFR_NEXT_USHORT( p );
    phy_font->metrics_resolution = PFR_NEXT_USHORT( p );
    phy_font->bbox.xMin          = PFR_NEXT_SHORT( p );
    phy_font->bbox.yMin          = PFR_NEXT_SHORT( p );
    phy_font->bbox.xMax          = PFR_NEXT_SHORT( p );
    phy_font->bbox.yMax          = PFR_NEXT_SHORT( p );
    phy_font->flags      = flags = PFR_NEXT_BYTE( p );

    /* get the standard advance for non-proportional fonts */
    if ( !(flags & PFR_PHY_PROPORTIONAL) )
    {
      PFR_CHECK( 2 );
      phy_font->standard_advance = PFR_NEXT_SHORT( p );
    }

    /* load the extra items when present */
    if ( flags & PFR_PHY_EXTRA_ITEMS )
    {
      error = pfr_extra_items_parse( &p, limit,
                                     pfr_phy_font_extra_items, phy_font );

      if ( error )
        goto Fail;
    }

    /* In certain fonts, the auxiliary bytes contain interesting   */
    /* information.  These are not in the specification but can be */
    /* guessed by looking at the content of a few PFR0 fonts.      */
    PFR_CHECK( 3 );
    num_aux = PFR_NEXT_ULONG( p );

    if ( num_aux > 0 )
    {
      FT_Byte*  q = p;
      FT_Byte*  q2;


      PFR_CHECK_SIZE( num_aux );
      p += num_aux;

      while ( num_aux > 0 )
      {
        FT_UInt  length, type;


        if ( q + 4 > p )
          break;

        length = PFR_NEXT_USHORT( q );
        if ( length < 4 || length > num_aux )
          break;

        q2   = q + length - 2;
        type = PFR_NEXT_USHORT( q );

        switch ( type )
        {
        case 1:
          /* this seems to correspond to the font's family name, padded to */
          /* an even number of bytes with a zero byte appended if needed   */
          error = pfr_aux_name_load( q, length - 4U, memory,
                                     &phy_font->family_name );
          if ( error )
            goto Exit;
          break;

        case 2:
          if ( q + 32 > q2 )
            break;

          q += 10;
          phy_font->ascent  = PFR_NEXT_SHORT( q );
          phy_font->descent = PFR_NEXT_SHORT( q );
          phy_font->leading = PFR_NEXT_SHORT( q );
          break;

        case 3:
          /* this seems to correspond to the font's style name, padded to */
          /* an even number of bytes with a zero byte appended if needed  */
          error = pfr_aux_name_load( q, length - 4U, memory,
                                     &phy_font->style_name );
          if ( error )
            goto Exit;
          break;

        default:
          ;
        }

        q        = q2;
        num_aux -= length;
      }
    }

    /* read the blue values */
    {
      FT_UInt  n, count;


      PFR_CHECK( 1 );
      phy_font->num_blue_values = count = PFR_NEXT_BYTE( p );

      PFR_CHECK( count * 2 );

      if ( FT_NEW_ARRAY( phy_font->blue_values, count ) )
        goto Fail;

      for ( n = 0; n < count; n++ )
        phy_font->blue_values[n] = PFR_NEXT_SHORT( p );
    }

    PFR_CHECK( 8 );
    phy_font->blue_fuzz  = PFR_NEXT_BYTE( p );
    phy_font->blue_scale = PFR_NEXT_BYTE( p );

    phy_font->vertical.standard   = PFR_NEXT_USHORT( p );
    phy_font->horizontal.standard = PFR_NEXT_USHORT( p );

    /* read the character descriptors */
    {
      FT_UInt  n, count, Size;


      phy_font->num_chars    = count = PFR_NEXT_USHORT( p );
      phy_font->chars_offset = offset + (FT_Offset)( p - stream->cursor );

      Size = 1 + 1 + 2;
      if ( flags & PFR_PHY_2BYTE_CHARCODE )
        Size += 1;

      if ( flags & PFR_PHY_PROPORTIONAL )
        Size += 2;

      if ( flags & PFR_PHY_ASCII_CODE )
        Size += 1;

      if ( flags & PFR_PHY_2BYTE_GPS_SIZE )
        Size += 1;

      if ( flags & PFR_PHY_3BYTE_GPS_OFFSET )
        Size += 1;

      PFR_CHECK_SIZE( count * Size );

      if ( FT_NEW_ARRAY( phy_font->chars, count ) )
        goto Fail;

      for ( n = 0; n < count; n++ )
      {
        PFR_Char  cur = &phy_font->chars[n];


        cur->char_code = ( flags & PFR_PHY_2BYTE_CHARCODE )
                         ? PFR_NEXT_USHORT( p )
                         : PFR_NEXT_BYTE( p );

        cur->advance   = ( flags & PFR_PHY_PROPORTIONAL )
                         ? PFR_NEXT_SHORT( p )
                         : phy_font->standard_advance;

#if 0
        cur->ascii     = ( flags & PFR_PHY_ASCII_CODE )
                         ? PFR_NEXT_BYTE( p )
                         : 0;
#else
        if ( flags & PFR_PHY_ASCII_CODE )
          p += 1;
#endif
        cur->gps_size  = ( flags & PFR_PHY_2BYTE_GPS_SIZE )
                         ? PFR_NEXT_USHORT( p )
                         : PFR_NEXT_BYTE( p );

        cur->gps_offset = ( flags & PFR_PHY_3BYTE_GPS_OFFSET )
                          ? PFR_NEXT_ULONG( p )
                          : PFR_NEXT_USHORT( p );
      }
    }

    /* that's it! */

  Fail:
    FT_FRAME_EXIT();

    /* save position of bitmap info */
    phy_font->bct_offset = FT_STREAM_POS();
    phy_font->cursor     = NULL;

  Exit:
    return error;

  Too_Short:
    error = FT_THROW( Invalid_Table );
    FT_ERROR(( "pfr_phy_font_load: invalid physical font table\n" ));
    goto Fail;
  }
Beispiel #23
0
  static FT_Error
  cff_charset_load( CFF_Charset  charset,
                    FT_UInt      num_glyphs,
                    FT_Stream    stream,
                    FT_ULong     base_offset,
                    FT_ULong     offset,
                    FT_Bool      invert )
  {
    FT_Memory  memory = stream->memory;
    FT_Error   error  = CFF_Err_Ok;
    FT_UShort  glyph_sid;


    /* If the the offset is greater than 2, we have to parse the */
    /* charset table.                                            */
    if ( offset > 2 )
    {
      FT_UInt  j;


      charset->offset = base_offset + offset;

      /* Get the format of the table. */
      if ( FT_STREAM_SEEK( charset->offset ) ||
           FT_READ_BYTE( charset->format )   )
        goto Exit;

      /* Allocate memory for sids. */
      if ( FT_NEW_ARRAY( charset->sids, num_glyphs ) )
        goto Exit;

      /* assign the .notdef glyph */
      charset->sids[0] = 0;

      switch ( charset->format )
      {
      case 0:
        if ( num_glyphs > 0 )
        {
          if ( FT_FRAME_ENTER( ( num_glyphs - 1 ) * 2 ) )
            goto Exit;

          for ( j = 1; j < num_glyphs; j++ )
            charset->sids[j] = FT_GET_USHORT();

          FT_FRAME_EXIT();
        }
        break;

      case 1:
      case 2:
        {
          FT_UInt  nleft;
          FT_UInt  i;


          j = 1;

          while ( j < num_glyphs )
          {
            /* Read the first glyph sid of the range. */
            if ( FT_READ_USHORT( glyph_sid ) )
              goto Exit;

            /* Read the number of glyphs in the range.  */
            if ( charset->format == 2 )
            {
              if ( FT_READ_USHORT( nleft ) )
                goto Exit;
            }
            else
            {
              if ( FT_READ_BYTE( nleft ) )
                goto Exit;
            }

            /* Fill in the range of sids -- `nleft + 1' glyphs. */
            for ( i = 0; j < num_glyphs && i <= nleft; i++, j++, glyph_sid++ )
              charset->sids[j] = glyph_sid;
          }
        }
        break;

      default:
        FT_ERROR(( "cff_charset_load: invalid table format!\n" ));
        error = CFF_Err_Invalid_File_Format;
        goto Exit;
      }
    }
    else
    {
      /* Parse default tables corresponding to offset == 0, 1, or 2.  */
      /* CFF specification intimates the following:                   */
      /*                                                              */
      /* In order to use a predefined charset, the following must be  */
      /* true: The charset constructed for the glyphs in the font's   */
      /* charstrings dictionary must match the predefined charset in  */
      /* the first num_glyphs.                                        */

      charset->offset = offset;  /* record charset type */

      switch ( (FT_UInt)offset )
      {
      case 0:
        if ( num_glyphs > 229 )
        {
          FT_ERROR(( "cff_charset_load: implicit charset larger than\n"
                     "predefined charset (Adobe ISO-Latin)!\n" ));
          error = CFF_Err_Invalid_File_Format;
          goto Exit;
        }

        /* Allocate memory for sids. */
        if ( FT_NEW_ARRAY( charset->sids, num_glyphs ) )
          goto Exit;

        /* Copy the predefined charset into the allocated memory. */
        FT_ARRAY_COPY( charset->sids, cff_isoadobe_charset, num_glyphs );

        break;

      case 1:
        if ( num_glyphs > 166 )
        {
          FT_ERROR(( "cff_charset_load: implicit charset larger than\n"
                     "predefined charset (Adobe Expert)!\n" ));
          error = CFF_Err_Invalid_File_Format;
          goto Exit;
        }

        /* Allocate memory for sids. */
        if ( FT_NEW_ARRAY( charset->sids, num_glyphs ) )
          goto Exit;

        /* Copy the predefined charset into the allocated memory.     */
        FT_ARRAY_COPY( charset->sids, cff_expert_charset, num_glyphs );

        break;

      case 2:
        if ( num_glyphs > 87 )
        {
          FT_ERROR(( "cff_charset_load: implicit charset larger than\n"
                     "predefined charset (Adobe Expert Subset)!\n" ));
          error = CFF_Err_Invalid_File_Format;
          goto Exit;
        }

        /* Allocate memory for sids. */
        if ( FT_NEW_ARRAY( charset->sids, num_glyphs ) )
          goto Exit;

        /* Copy the predefined charset into the allocated memory.     */
        FT_ARRAY_COPY( charset->sids, cff_expertsubset_charset, num_glyphs );

        break;

      default:
        error = CFF_Err_Invalid_File_Format;
        goto Exit;
      }
    }

    /* we have to invert the `sids' array for subsetted CID-keyed fonts */
    if ( invert )
      error = cff_charset_compute_cids( charset, num_glyphs, memory );

  Exit:
    /* Clean up if there was an error. */
    if ( error )
    {
      FT_FREE( charset->sids );
      FT_FREE( charset->cids );
      charset->format = 0;
      charset->offset = 0;
      charset->sids   = 0;
    }

    return error;
  }
Beispiel #24
0
  tt_face_load_font_dir( TT_Face    face,
                         FT_Stream  stream )
  {
    SFNT_HeaderRec  sfnt;
    FT_Error        error;
    FT_Memory       memory = stream->memory;
    TT_TableRec*    entry;
    FT_Int          nn;

    static const FT_Frame_Field  offset_table_fields[] =
    {
#undef  FT_STRUCTURE
#define FT_STRUCTURE  SFNT_HeaderRec

      FT_FRAME_START( 8 ),
        FT_FRAME_USHORT( num_tables ),
        FT_FRAME_USHORT( search_range ),
        FT_FRAME_USHORT( entry_selector ),
        FT_FRAME_USHORT( range_shift ),
      FT_FRAME_END
    };


    FT_TRACE2(( "tt_face_load_font_dir: %08p\n", face ));

    /* read the offset table */

    sfnt.offset = FT_STREAM_POS();

    if ( FT_READ_ULONG( sfnt.format_tag )                    ||
         FT_STREAM_READ_FIELDS( offset_table_fields, &sfnt ) )
      goto Exit;

    /* many fonts don't have these fields set correctly */
#if 0
    if ( sfnt.search_range != 1 << ( sfnt.entry_selector + 4 )        ||
         sfnt.search_range + sfnt.range_shift != sfnt.num_tables << 4 )
      return FT_THROW( Unknown_File_Format );
#endif

    /* load the table directory */

    FT_TRACE2(( "-- Number of tables: %10u\n",    sfnt.num_tables ));
    FT_TRACE2(( "-- Format version:   0x%08lx\n", sfnt.format_tag ));

    if ( sfnt.format_tag != TTAG_OTTO )
    {
      /* check first */
      error = check_table_dir( &sfnt, stream );
      if ( error )
      {
        FT_TRACE2(( "tt_face_load_font_dir:"
                    " invalid table directory for TrueType\n" ));

        goto Exit;
      }
    }

    face->num_tables = sfnt.num_tables;
    face->format_tag = sfnt.format_tag;

    if ( FT_QNEW_ARRAY( face->dir_tables, face->num_tables ) )
      goto Exit;

    if ( FT_STREAM_SEEK( sfnt.offset + 12 )       ||
         FT_FRAME_ENTER( face->num_tables * 16L ) )
      goto Exit;

    entry = face->dir_tables;

    FT_TRACE2(( "\n"
                "  tag    offset    length   checksum\n"
                "  ----------------------------------\n" ));

    for ( nn = 0; nn < sfnt.num_tables; nn++ )
    {
      entry->Tag      = FT_GET_TAG4();
      entry->CheckSum = FT_GET_ULONG();
      entry->Offset   = FT_GET_ULONG();
      entry->Length   = FT_GET_ULONG();

      /* ignore invalid tables that can't be sanitized */

      if ( entry->Offset > stream->size )
        continue;
      else if ( entry->Length > stream->size - entry->Offset )
      {
        if ( entry->Tag == TTAG_hmtx ||
             entry->Tag == TTAG_vmtx )
        {
#ifdef FT_DEBUG_LEVEL_TRACE
          FT_ULong  old_length = entry->Length;
#endif


          /* make metrics table length a multiple of 4 */
          entry->Length = ( stream->size - entry->Offset ) & ~3U;

          FT_TRACE2(( "  %c%c%c%c  %08lx  %08lx  %08lx"
                      " (sanitized; original length %08lx)\n",
                      (FT_Char)( entry->Tag >> 24 ),
                      (FT_Char)( entry->Tag >> 16 ),
                      (FT_Char)( entry->Tag >> 8  ),
                      (FT_Char)( entry->Tag       ),
                      entry->Offset,
                      entry->Length,
                      entry->CheckSum,
                      old_length ));
          entry++;
        }
        else
          continue;
      }
Beispiel #25
0
  pfr_log_font_load( PFR_LogFont  log_font,
                     FT_Stream    stream,
                     FT_UInt      idx,
                     FT_UInt32    section_offset,
                     FT_Bool      size_increment )
  {
    FT_UInt    num_log_fonts;
    FT_UInt    flags;
    FT_UInt32  offset;
    FT_UInt32  size;
    FT_Error   error;


    if ( FT_STREAM_SEEK( section_offset ) ||
         FT_READ_USHORT( num_log_fonts )  )
      goto Exit;

    if ( idx >= num_log_fonts )
      return FT_THROW( Invalid_Argument );

    if ( FT_STREAM_SKIP( idx * 5 ) ||
         FT_READ_USHORT( size )    ||
         FT_READ_UOFF3 ( offset )  )
      goto Exit;

    /* save logical font size and offset */
    log_font->size   = size;
    log_font->offset = offset;

    /* now, check the rest of the table before loading it */
    {
      FT_Byte*  p;
      FT_Byte*  limit;
      FT_UInt   local;


      if ( FT_STREAM_SEEK( offset ) ||
           FT_FRAME_ENTER( size )   )
        goto Exit;

      p     = stream->cursor;
      limit = p + size;

      PFR_CHECK( 13 );

      log_font->matrix[0] = PFR_NEXT_LONG( p );
      log_font->matrix[1] = PFR_NEXT_LONG( p );
      log_font->matrix[2] = PFR_NEXT_LONG( p );
      log_font->matrix[3] = PFR_NEXT_LONG( p );

      flags = PFR_NEXT_BYTE( p );

      local = 0;
      if ( flags & PFR_LOG_STROKE )
      {
        local++;
        if ( flags & PFR_LOG_2BYTE_STROKE )
          local++;

        if ( ( flags & PFR_LINE_JOIN_MASK ) == PFR_LINE_JOIN_MITER )
          local += 3;
      }
      if ( flags & PFR_LOG_BOLD )
      {
        local++;
        if ( flags & PFR_LOG_2BYTE_BOLD )
          local++;
      }

      PFR_CHECK( local );

      if ( flags & PFR_LOG_STROKE )
      {
        log_font->stroke_thickness = ( flags & PFR_LOG_2BYTE_STROKE )
                                     ? PFR_NEXT_SHORT( p )
                                     : PFR_NEXT_BYTE( p );

        if ( ( flags & PFR_LINE_JOIN_MASK ) == PFR_LINE_JOIN_MITER )
          log_font->miter_limit = PFR_NEXT_LONG( p );
      }

      if ( flags & PFR_LOG_BOLD )
      {
        log_font->bold_thickness = ( flags & PFR_LOG_2BYTE_BOLD )
                                   ? PFR_NEXT_SHORT( p )
                                   : PFR_NEXT_BYTE( p );
      }

      if ( flags & PFR_LOG_EXTRA_ITEMS )
      {
        error = pfr_extra_items_skip( &p, limit );
        if ( error )
          goto Fail;
      }

      PFR_CHECK( 5 );
      log_font->phys_size   = PFR_NEXT_USHORT( p );
      log_font->phys_offset = PFR_NEXT_ULONG( p );
      if ( size_increment )
      {
        PFR_CHECK( 1 );
        log_font->phys_size += (FT_UInt32)PFR_NEXT_BYTE( p ) << 16;
      }
    }

  Fail:
    FT_FRAME_EXIT();

  Exit:
    return error;

  Too_Short:
    FT_ERROR(( "pfr_log_font_load: invalid logical font table\n" ));
    error = FT_THROW( Invalid_Table );
    goto Fail;
  }
Beispiel #26
0
  static FT_Error
  check_table_dir( SFNT_Header  sfnt,
                   FT_Stream    stream )
  {
    FT_Error  error;
    FT_UInt   nn, valid_entries = 0;
    FT_UInt   has_head = 0, has_sing = 0, has_meta = 0;
    FT_ULong  offset = sfnt->offset + 12;

    static const FT_Frame_Field  table_dir_entry_fields[] =
    {
#undef  FT_STRUCTURE
#define FT_STRUCTURE  TT_TableRec

      FT_FRAME_START( 16 ),
        FT_FRAME_ULONG( Tag ),
        FT_FRAME_ULONG( CheckSum ),
        FT_FRAME_ULONG( Offset ),
        FT_FRAME_ULONG( Length ),
      FT_FRAME_END
    };


    if ( FT_STREAM_SEEK( offset ) )
      goto Exit;

    for ( nn = 0; nn < sfnt->num_tables; nn++ )
    {
      TT_TableRec  table;


      if ( FT_STREAM_READ_FIELDS( table_dir_entry_fields, &table ) )
      {
        nn--;
        FT_TRACE2(( "check_table_dir:"
                    " can read only %d table%s in font (instead of %d)\n",
                    nn, nn == 1 ? "" : "s", sfnt->num_tables ));
        sfnt->num_tables = nn;
        break;
      }

      /* we ignore invalid tables */
      if ( table.Offset + table.Length > stream->size )
      {
        FT_TRACE2(( "check_table_dir: table entry %d invalid\n", nn ));
        continue;
      }
      else
        valid_entries++;

      if ( table.Tag == TTAG_head || table.Tag == TTAG_bhed )
      {
        FT_UInt32  magic;


#ifndef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
        if ( table.Tag == TTAG_head )
#endif
          has_head = 1;

        /*
         * The table length should be 0x36, but certain font tools make it
         * 0x38, so we will just check that it is greater.
         *
         * Note that according to the specification, the table must be
         * padded to 32-bit lengths, but this doesn't apply to the value of
         * its `Length' field!
         *
         */
        if ( table.Length < 0x36 )
        {
          FT_TRACE2(( "check_table_dir: `head' table too small\n" ));
          error = SFNT_Err_Table_Missing;
          goto Exit;
        }

        if ( FT_STREAM_SEEK( table.Offset + 12 ) ||
             FT_READ_ULONG( magic )              )
          goto Exit;

        if ( magic != 0x5F0F3CF5UL )
        {
          FT_TRACE2(( "check_table_dir:"
                      " no magic number found in `head' table\n"));
          error = SFNT_Err_Table_Missing;
          goto Exit;
        }

        if ( FT_STREAM_SEEK( offset + ( nn + 1 ) * 16 ) )
          goto Exit;
      }
      else if ( table.Tag == TTAG_SING )
        has_sing = 1;
      else if ( table.Tag == TTAG_META )
        has_meta = 1;
    }

    sfnt->num_tables = valid_entries;

    if ( sfnt->num_tables == 0 )
    {
      FT_TRACE2(( "check_table_dir: no tables found\n" ));
      error = SFNT_Err_Unknown_File_Format;
      goto Exit;
    }

    /* if `sing' and `meta' tables are present, there is no `head' table */
    if ( has_head || ( has_sing && has_meta ) )
    {
      error = SFNT_Err_Ok;
      goto Exit;
    }
    else
    {
      FT_TRACE2(( "check_table_dir:" ));
#ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS
      FT_TRACE2(( " neither `head', `bhed', nor `sing' table found\n" ));
#else
      FT_TRACE2(( " neither `head' nor `sing' table found\n" ));
#endif
      error = SFNT_Err_Table_Missing;
    }

  Exit:
    return error;
  }
Beispiel #27
0
  tt_face_get_metrics( TT_Face     face,
                       FT_Bool     vertical,
                       FT_UInt     gindex,
                       FT_Short   *abearing,
                       FT_UShort  *aadvance )
  {
    FT_Error        error;
    FT_Stream       stream = face->root.stream;
    TT_HoriHeader*  header;
    FT_ULong        table_pos, table_size, table_end;
    FT_UShort       k;


    if ( vertical )
    {
      void*  v = &face->vertical;


      header     = (TT_HoriHeader*)v;
      table_pos  = face->vert_metrics_offset;
      table_size = face->vert_metrics_size;
    }
    else
    {
      header     = &face->horizontal;
      table_pos  = face->horz_metrics_offset;
      table_size = face->horz_metrics_size;
    }

    table_end = table_pos + table_size;

    k = header->number_Of_HMetrics;

    if ( k > 0 )
    {
      if ( gindex < (FT_UInt)k )
      {
        table_pos += 4 * gindex;
        if ( table_pos + 4 > table_end )
          goto NoData;

        if ( FT_STREAM_SEEK( table_pos ) ||
             FT_READ_USHORT( *aadvance ) ||
             FT_READ_SHORT( *abearing )  )
          goto NoData;
      }
      else
      {
        table_pos += 4 * ( k - 1 );
        if ( table_pos + 4 > table_end )
          goto NoData;

        if ( FT_STREAM_SEEK( table_pos ) ||
             FT_READ_USHORT( *aadvance ) )
          goto NoData;

        table_pos += 4 + 2 * ( gindex - k );
        if ( table_pos + 2 > table_end )
          *abearing = 0;
        else
        {
          if ( !FT_STREAM_SEEK( table_pos ) )
            (void)FT_READ_SHORT( *abearing );
        }
      }
    }
    else
    {
    NoData:
      *abearing = 0;
      *aadvance = 0;
    }

    return SFNT_Err_Ok;
  }
Beispiel #28
0
  tt_face_load_font_dir( TT_Face    face,
                         FT_Stream  stream )
  {
    SFNT_HeaderRec  sfnt;
    FT_Error        error;
    FT_Memory       memory = stream->memory;
    TT_TableRec*    entry;
    FT_Int          nn;

    static const FT_Frame_Field  offset_table_fields[] =
    {
#undef  FT_STRUCTURE
#define FT_STRUCTURE  SFNT_HeaderRec

      FT_FRAME_START( 8 ),
        FT_FRAME_USHORT( num_tables ),
        FT_FRAME_USHORT( search_range ),
        FT_FRAME_USHORT( entry_selector ),
        FT_FRAME_USHORT( range_shift ),
      FT_FRAME_END
    };


    FT_TRACE2(( "tt_face_load_font_dir: %08p\n", face ));

    /* read the offset table */

    sfnt.offset = FT_STREAM_POS();

    if ( FT_READ_ULONG( sfnt.format_tag )                    ||
         FT_STREAM_READ_FIELDS( offset_table_fields, &sfnt ) )
      goto Exit;

    /* many fonts don't have these fields set correctly */
#if 0
    if ( sfnt.search_range != 1 << ( sfnt.entry_selector + 4 )        ||
         sfnt.search_range + sfnt.range_shift != sfnt.num_tables << 4 )
      return SFNT_Err_Unknown_File_Format;
#endif

    /* load the table directory */

    FT_TRACE2(( "-- Number of tables: %10u\n",    sfnt.num_tables ));
    FT_TRACE2(( "-- Format version:   0x%08lx\n", sfnt.format_tag ));

    /* check first */
    error = check_table_dir( &sfnt, stream );
    if ( error )
    {
      FT_TRACE2(( "tt_face_load_font_dir:"
                  " invalid table directory for TrueType\n" ));

      goto Exit;
    }

    face->num_tables = sfnt.num_tables;
    face->format_tag = sfnt.format_tag;

    if ( FT_QNEW_ARRAY( face->dir_tables, face->num_tables ) )
      goto Exit;

    if ( FT_STREAM_SEEK( sfnt.offset + 12 )       ||
         FT_FRAME_ENTER( face->num_tables * 16L ) )
      goto Exit;

    entry = face->dir_tables;

    for ( nn = 0; nn < sfnt.num_tables; nn++ )
    {
      entry->Tag      = FT_GET_TAG4();
      entry->CheckSum = FT_GET_ULONG();
      entry->Offset   = FT_GET_LONG();
      entry->Length   = FT_GET_LONG();

      /* ignore invalid tables */
      if ( entry->Offset + entry->Length > stream->size )
        continue;
      else
      {
        FT_TRACE2(( "  %c%c%c%c  -  %08lx  -  %08lx\n",
                    (FT_Char)( entry->Tag >> 24 ),
                    (FT_Char)( entry->Tag >> 16 ),
                    (FT_Char)( entry->Tag >> 8  ),
                    (FT_Char)( entry->Tag       ),
                    entry->Offset,
                    entry->Length ));
        entry++;
      }
    }

    FT_FRAME_EXIT();

    FT_TRACE2(( "table directory loaded\n\n" ));

  Exit:
    return error;
  }
  static const char*
  get_sfnt_postscript_name( TT_Face  face )
  {
    FT_Int       n, found_win, found_apple;
    const char*  result = NULL;


    /* shouldn't happen, but just in case to avoid memory leaks */
    if ( face->root.internal->postscript_name )
      return face->root.internal->postscript_name;

    /* scan the name table to see whether we have a Postscript name here, */
    /* either in Macintosh or Windows platform encodings                  */
    found_win   = -1;
    found_apple = -1;

    for ( n = 0; n < face->num_names; n++ )
    {
      TT_NameEntryRec*  name = face->name_table.names + n;


      if ( name->nameID == 6 && name->stringLength > 0 )
      {
        if ( name->platformID == 3     &&
             name->encodingID == 1     &&
             name->languageID == 0x409 )
          found_win = n;

        if ( name->platformID == 1 &&
             name->encodingID == 0 &&
             name->languageID == 0 )
          found_apple = n;
      }
    }

    if ( found_win != -1 )
    {
      FT_Memory         memory = face->root.memory;
      TT_NameEntryRec*  name   = face->name_table.names + found_win;
      FT_UInt           len    = name->stringLength / 2;
      FT_Error          error;


      if ( !FT_ALLOC( result, name->stringLength + 1 ) )
      {
        FT_Stream   stream = face->name_table.stream;
        FT_String*  r      = (FT_String*)result;
        FT_Byte*    p      = (FT_Byte*)name->string;


        if ( FT_STREAM_SEEK( name->stringOffset ) ||
             FT_FRAME_ENTER( name->stringLength ) )
        {
          FT_FREE( result );
          name->stringLength = 0;
          name->stringOffset = 0;
          FT_FREE( name->string );

          goto Exit;
        }

        p = (FT_Byte*)stream->cursor;

        for ( ; len > 0; len--, p += 2 )
        {
          if ( p[0] == 0 && p[1] >= 32 && p[1] < 128 )
            *r++ = p[1];
        }
        *r = '\0';

        FT_FRAME_EXIT();
      }
      goto Exit;
    }

    if ( found_apple != -1 )
    {
      FT_Memory         memory = face->root.memory;
      TT_NameEntryRec*  name   = face->name_table.names + found_apple;
      FT_UInt           len    = name->stringLength;
      FT_Error          error;


      if ( !FT_ALLOC( result, len + 1 ) )
      {
        FT_Stream  stream = face->name_table.stream;


        if ( FT_STREAM_SEEK( name->stringOffset ) ||
             FT_STREAM_READ( result, len )        )
        {
          name->stringOffset = 0;
          name->stringLength = 0;
          FT_FREE( name->string );
          FT_FREE( result );
          goto Exit;
        }
        ((char*)result)[len] = '\0';
      }
    }

  Exit:
    face->root.internal->postscript_name = result;
    return result;
  }
Beispiel #30
0
  cid_face_init( FT_Stream      stream,
                 FT_Face        cidface,        /* CID_Face */
                 FT_Int         face_index,
                 FT_Int         num_params,
                 FT_Parameter*  params )
  {
    CID_Face          face = (CID_Face)cidface;
    FT_Error          error;
    PSAux_Service     psaux;
    PSHinter_Service  pshinter;

    FT_UNUSED( num_params );
    FT_UNUSED( params );
    FT_UNUSED( stream );


    cidface->num_faces = 1;

    psaux = (PSAux_Service)face->psaux;
    if ( !psaux )
    {
      psaux = (PSAux_Service)FT_Get_Module_Interface(
                FT_FACE_LIBRARY( face ), "psaux" );

      face->psaux = psaux;
    }

    pshinter = (PSHinter_Service)face->pshinter;
    if ( !pshinter )
    {
      pshinter = (PSHinter_Service)FT_Get_Module_Interface(
                   FT_FACE_LIBRARY( face ), "pshinter" );

      face->pshinter = pshinter;
    }

    /* open the tokenizer; this will also check the font format */
    if ( FT_STREAM_SEEK( 0 ) )
      goto Exit;

    error = cid_face_open( face, face_index );
    if ( error )
      goto Exit;

    /* if we just wanted to check the format, leave successfully now */
    if ( face_index < 0 )
      goto Exit;

    /* check the face index */
    /* XXX: handle CID fonts with more than a single face */
    if ( face_index != 0 )
    {
      FT_ERROR(( "cid_face_init: invalid face index\n" ));
      error = CID_Err_Invalid_Argument;
      goto Exit;
    }

    /* now load the font program into the face object */

    /* initialize the face object fields */

    /* set up root face fields */
    {
      CID_FaceInfo  cid  = &face->cid;
      PS_FontInfo   info = &cid->font_info;


      cidface->num_glyphs   = cid->cid_count;
      cidface->num_charmaps = 0;

      cidface->face_index = face_index;
      cidface->face_flags = FT_FACE_FLAG_SCALABLE   | /* scalable outlines */
                            FT_FACE_FLAG_HORIZONTAL | /* horizontal data   */
                            FT_FACE_FLAG_HINTER;      /* has native hinter */

      if ( info->is_fixed_pitch )
        cidface->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;

      /* XXX: TODO: add kerning with .afm support */

      /* get style name -- be careful, some broken fonts only */
      /* have a /FontName dictionary entry!                   */
      cidface->family_name = info->family_name;
      /* assume "Regular" style if we don't know better */
      cidface->style_name = (char *)"Regular";
      if ( cidface->family_name )
      {
        char*  full   = info->full_name;
        char*  family = cidface->family_name;


        if ( full )
        {
          while ( *full )
          {
            if ( *full == *family )
            {
              family++;
              full++;
            }
            else
            {
              if ( *full == ' ' || *full == '-' )
                full++;
              else if ( *family == ' ' || *family == '-' )
                family++;
              else
              {
                if ( !*family )
                  cidface->style_name = full;
                break;
              }
            }
          }
        }
      }
      else
      {
        /* do we have a `/FontName'? */
        if ( cid->cid_font_name )
          cidface->family_name = cid->cid_font_name;
      }

      /* compute style flags */
      cidface->style_flags = 0;
      if ( info->italic_angle )
        cidface->style_flags |= FT_STYLE_FLAG_ITALIC;
      if ( info->weight )
      {
        if ( !ft_strcmp( info->weight, "Bold"  ) ||
             !ft_strcmp( info->weight, "Black" ) )
          cidface->style_flags |= FT_STYLE_FLAG_BOLD;
      }

      /* no embedded bitmap support */
      cidface->num_fixed_sizes = 0;
      cidface->available_sizes = 0;

      cidface->bbox.xMin =   cid->font_bbox.xMin             >> 16;
      cidface->bbox.yMin =   cid->font_bbox.yMin             >> 16;
      cidface->bbox.xMax = ( cid->font_bbox.xMax + 0xFFFFU ) >> 16;
      cidface->bbox.yMax = ( cid->font_bbox.yMax + 0xFFFFU ) >> 16;

      if ( !cidface->units_per_EM )
        cidface->units_per_EM = 1000;

      cidface->ascender  = (FT_Short)( cidface->bbox.yMax );
      cidface->descender = (FT_Short)( cidface->bbox.yMin );

      cidface->height = (FT_Short)( ( cidface->units_per_EM * 12 ) / 10 );
      if ( cidface->height < cidface->ascender - cidface->descender )
        cidface->height = (FT_Short)( cidface->ascender - cidface->descender );

      cidface->underline_position  = (FT_Short)info->underline_position;
      cidface->underline_thickness = (FT_Short)info->underline_thickness;
    }

  Exit:
    return error;
  }