Пример #1
0
  /* parse a PFM file -- for now, only read the kerning pairs */
  static FT_Error
  T1_Read_PFM( FT_Face       t1_face,
               FT_Stream     stream,
               AFM_FontInfo  fi )
  {
    FT_Error      error  = FT_Err_Ok;
    FT_Memory     memory = stream->memory;
    FT_Byte*      start;
    FT_Byte*      limit;
    FT_Byte*      p;
    AFM_KernPair  kp;
    FT_Int        width_table_length;
    FT_CharMap    oldcharmap;
    FT_CharMap    charmap;
    FT_Int        n;


    start = (FT_Byte*)stream->cursor;
    limit = (FT_Byte*)stream->limit;
    p     = start;

    /* Figure out how long the width table is.          */
    /* This info is a little-endian short at offset 99. */
    p = start + 99;
    if ( p + 2 > limit )
    {
      error = FT_THROW( Unknown_File_Format );
      goto Exit;
    }
    width_table_length = FT_PEEK_USHORT_LE( p );

    p += 18 + width_table_length;
    if ( p + 0x12 > limit || FT_PEEK_USHORT_LE( p ) < 0x12 )
      /* extension table is probably optional */
      goto Exit;

    /* Kerning offset is 14 bytes from start of extensions table. */
    p += 14;
    p = start + FT_PEEK_ULONG_LE( p );

    if ( p == start )
      /* zero offset means no table */
      goto Exit;

    if ( p + 2 > limit )
    {
      error = FT_THROW( Unknown_File_Format );
      goto Exit;
    }

    fi->NumKernPair = FT_PEEK_USHORT_LE( p );
    p += 2;
    if ( p + 4 * fi->NumKernPair > limit )
    {
      error = FT_THROW( Unknown_File_Format );
      goto Exit;
    }

    /* Actually, kerning pairs are simply optional! */
    if ( fi->NumKernPair == 0 )
      goto Exit;

    /* allocate the pairs */
    if ( FT_QNEW_ARRAY( fi->KernPairs, fi->NumKernPair ) )
      goto Exit;

    /* now, read each kern pair */
    kp             = fi->KernPairs;
    limit          = p + 4 * fi->NumKernPair;

    /* PFM kerning data are stored by encoding rather than glyph index, */
    /* so find the PostScript charmap of this font and install it       */
    /* temporarily.  If we find no PostScript charmap, then just use    */
    /* the default and hope it is the right one.                        */
    oldcharmap = t1_face->charmap;
    charmap    = NULL;

    for ( n = 0; n < t1_face->num_charmaps; n++ )
    {
      charmap = t1_face->charmaps[n];
      /* check against PostScript pseudo platform */
      if ( charmap->platform_id == 7 )
      {
        error = FT_Set_Charmap( t1_face, charmap );
        if ( error )
          goto Exit;
        break;
      }
    }

    /* Kerning info is stored as:             */
    /*                                        */
    /*   encoding of first glyph (1 byte)     */
    /*   encoding of second glyph (1 byte)    */
    /*   offset (little-endian short)         */
    for ( ; p < limit ; p += 4 )
    {
      kp->index1 = FT_Get_Char_Index( t1_face, p[0] );
      kp->index2 = FT_Get_Char_Index( t1_face, p[1] );

      kp->x = (FT_Int)FT_PEEK_SHORT_LE(p + 2);
      kp->y = 0;

      kp++;
    }

    if ( oldcharmap != NULL )
      error = FT_Set_Charmap( t1_face, oldcharmap );
    if ( error )
      goto Exit;

    /* now, sort the kern pairs according to their glyph indices */
    ft_qsort( fi->KernPairs, fi->NumKernPair, sizeof ( AFM_KernPairRec ),
              compare_kern_pairs );

  Exit:
    if ( error )
    {
      FT_FREE( fi->KernPairs );
      fi->NumKernPair = 0;
    }

    return error;
  }
Пример #2
0
  T1_Read_Metrics( FT_Face    t1_face,
                   FT_Stream  stream )
  {
    PSAux_Service  psaux;
    FT_Memory      memory  = stream->memory;
    AFM_ParserRec  parser;
    AFM_FontInfo   fi      = NULL;
    FT_Error       error   = FT_ERR( Unknown_File_Format );
    T1_Font        t1_font = &( (T1_Face)t1_face )->type1;


    if ( FT_NEW( fi )                   ||
         FT_FRAME_ENTER( stream->size ) )
      goto Exit;

    fi->FontBBox  = t1_font->font_bbox;
    fi->Ascender  = t1_font->font_bbox.yMax;
    fi->Descender = t1_font->font_bbox.yMin;

    psaux = (PSAux_Service)( (T1_Face)t1_face )->psaux;
    if ( psaux->afm_parser_funcs )
    {
      error = psaux->afm_parser_funcs->init( &parser,
                                             stream->memory,
                                             stream->cursor,
                                             stream->limit );

      if ( !error )
      {
        parser.FontInfo  = fi;
        parser.get_index = t1_get_index;
        parser.user_data = t1_font;

        error = psaux->afm_parser_funcs->parse( &parser );
        psaux->afm_parser_funcs->done( &parser );
      }
    }

    if ( FT_ERR_EQ( error, Unknown_File_Format ) )
    {
      FT_Byte*  start = stream->cursor;


      /* MS Windows allows versions up to 0x3FF without complaining */
      if ( stream->size > 6                              &&
           start[1] < 4                                  &&
           FT_PEEK_ULONG_LE( start + 2 ) == stream->size )
        error = T1_Read_PFM( t1_face, stream, fi );
    }

    if ( !error )
    {
      t1_font->font_bbox = fi->FontBBox;

      t1_face->bbox.xMin =   fi->FontBBox.xMin            >> 16;
      t1_face->bbox.yMin =   fi->FontBBox.yMin            >> 16;
      /* no `U' suffix here to 0xFFFF! */
      t1_face->bbox.xMax = ( fi->FontBBox.xMax + 0xFFFF ) >> 16;
      t1_face->bbox.yMax = ( fi->FontBBox.yMax + 0xFFFF ) >> 16;

      /* no `U' suffix here to 0x8000! */
      t1_face->ascender  = (FT_Short)( ( fi->Ascender  + 0x8000 ) >> 16 );
      t1_face->descender = (FT_Short)( ( fi->Descender + 0x8000 ) >> 16 );

      if ( fi->NumKernPair )
      {
        t1_face->face_flags |= FT_FACE_FLAG_KERNING;
        ( (T1_Face)t1_face )->afm_data = fi;
        fi = NULL;
      }
    }
Пример #3
0
  T1_Read_Metrics( FT_Face    t1_face,
                   FT_Stream  stream )
  {
    PSAux_Service  psaux;
    FT_Memory      memory = stream->memory;
    AFM_ParserRec  parser;
    AFM_FontInfo   fi;
    FT_Error       error = T1_Err_Unknown_File_Format;
    T1_Font        t1_font = &( (T1_Face)t1_face )->type1;


    if ( FT_NEW( fi ) )
      return error;

    if ( FT_FRAME_ENTER( stream->size ) )
    {
      FT_FREE( fi );
      return error;
    }

    fi->FontBBox  = t1_font->font_bbox;
    fi->Ascender  = t1_font->font_bbox.yMax;
    fi->Descender = t1_font->font_bbox.yMin;

    psaux = (PSAux_Service)( (T1_Face)t1_face )->psaux;
    if ( psaux && psaux->afm_parser_funcs )
    {
      error = psaux->afm_parser_funcs->init( &parser,
                                             stream->memory,
                                             stream->cursor,
                                             stream->limit );

      if ( !error )
      {
        parser.FontInfo  = fi;
        parser.get_index = t1_get_index;
        parser.user_data = t1_font;

        error = psaux->afm_parser_funcs->parse( &parser );
        psaux->afm_parser_funcs->done( &parser );
      }
    }

    if ( error == T1_Err_Unknown_File_Format )
    {
      FT_Byte*  start = stream->cursor;


      if ( stream->size > 6                              &&
           start[0] == 0x00 && start[1] == 0x01          &&
           FT_PEEK_ULONG_LE( start + 2 ) == stream->size )
        error = T1_Read_PFM( t1_face, stream, fi );
    }

    if ( !error )
    {
      t1_font->font_bbox = fi->FontBBox;

      t1_face->bbox.xMin =   fi->FontBBox.xMin             >> 16;
      t1_face->bbox.yMin =   fi->FontBBox.yMin             >> 16;
      t1_face->bbox.xMax = ( fi->FontBBox.xMax + 0xFFFFU ) >> 16;
      t1_face->bbox.yMax = ( fi->FontBBox.yMax + 0xFFFFU ) >> 16;

      t1_face->ascender  = (FT_Short)( ( fi->Ascender  + 0x8000U ) >> 16 );
      t1_face->descender = (FT_Short)( ( fi->Descender + 0x8000U ) >> 16 );

      if ( fi->NumKernPair )
      {
        t1_face->face_flags |= FT_FACE_FLAG_KERNING;
        ( (T1_Face)t1_face )->afm_data = fi;
      }
    }