t1objs.c

winNT技术操作系统,国外开放的原代码和LIUX一样

  /*    FreeType error code.  0 means success.                             */
  /*                                                                       */
  FT_LOCAL_DEF( FT_Error )
  T1_Face_Init( FT_Stream      stream,
                T1_Face        face,
                FT_Int         face_index,
                FT_Int         num_params,
                FT_Parameter*  params )
  {
    FT_Error            error;
    FT_Service_PsCMaps  psnames;
    PSAux_Service       psaux;
    T1_Font             type1 = &face->type1;
    PS_FontInfo         info = &type1->font_info;

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


    face->root.num_faces = 1;

    FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
    face->psnames = psnames;

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

    face->pshinter = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
                                              "pshinter" );

    /* open the tokenizer; this will also check the font format */
    error = T1_Open_Face( face );
    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 */
    if ( face_index != 0 )
    {
      FT_ERROR(( "T1_Face_Init: invalid face index\n" ));
      error = T1_Err_Invalid_Argument;
      goto Exit;
    }

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

    /* initialize the face object fields */

    /* set up root face fields */
    {
      FT_Face  root = (FT_Face)&face->root;


      root->num_glyphs = type1->num_glyphs;
      root->face_index = face_index;

      root->face_flags = FT_FACE_FLAG_SCALABLE    |
                         FT_FACE_FLAG_HORIZONTAL  |
                         FT_FACE_FLAG_GLYPH_NAMES |
                         FT_FACE_FLAG_HINTER;

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

      if ( face->blend )
        root->face_flags |= FT_FACE_FLAG_MULTIPLE_MASTERS;

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

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


        if ( full )
        {
          while ( *full )
          {
            if ( *full == *family )
            {
              family++;
              full++;
            }
            else
            {
              if ( *full == ' ' || *full == '-' )
                full++;
              else if ( *family == ' ' || *family == '-' )
                family++;
              else
              {
                if ( !*family )
                  root->style_name = full;
                break;
              }
            }
          }
        }
      }
      else
      {
        /* do we have a `/FontName'? */
        if ( type1->font_name )
          root->family_name = type1->font_name;
      }

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

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

      root->bbox.xMin =   type1->font_bbox.xMin             >> 16;
      root->bbox.yMin =   type1->font_bbox.yMin             >> 16;
      root->bbox.xMax = ( type1->font_bbox.xMax + 0xFFFFU ) >> 16;
      root->bbox.yMax = ( type1->font_bbox.yMax + 0xFFFFU ) >> 16;

      /* Set units_per_EM if we didn't set it in parse_font_matrix. */
      if ( !root->units_per_EM )
        root->units_per_EM = 1000;

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

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

      /* now compute the maximum advance width */
      root->max_advance_width =
        (FT_Short)( root->bbox.xMax );
      {
        FT_Pos  max_advance;


        error = T1_Compute_Max_Advance( face, &max_advance );

        /* in case of error, keep the standard width */
        if ( !error )
          root->max_advance_width = (FT_Short)max_advance;
        else
          error = 0;   /* clear error */
      }

      root->max_advance_height = root->height;

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

    {
      FT_Face  root = &face->root;


      if ( psnames && psaux )
      {
        FT_CharMapRec    charmap;
        T1_CMap_Classes  cmap_classes = psaux->t1_cmap_classes;
        FT_CMap_Class    clazz;


        charmap.face = root;

        /* first of all, try to synthetize a Unicode charmap */
        charmap.platform_id = 3;
        charmap.encoding_id = 1;
        charmap.encoding    = FT_ENCODING_UNICODE;

        FT_CMap_New( cmap_classes->unicode, NULL, &charmap, NULL );

        /* now, generate an Adobe Standard encoding when appropriate */
        charmap.platform_id = 7;
        clazz               = NULL;

        switch ( type1->encoding_type )
        {
        case T1_ENCODING_TYPE_STANDARD:
          charmap.encoding    = FT_ENCODING_ADOBE_STANDARD;
          charmap.encoding_id = TT_ADOBE_ID_STANDARD;
          clazz               = cmap_classes->standard;
          break;

        case T1_ENCODING_TYPE_EXPERT:
          charmap.encoding    = FT_ENCODING_ADOBE_EXPERT;
          charmap.encoding_id = TT_ADOBE_ID_EXPERT;
          clazz               = cmap_classes->expert;
          break;

        case T1_ENCODING_TYPE_ARRAY:
          charmap.encoding    = FT_ENCODING_ADOBE_CUSTOM;
          charmap.encoding_id = TT_ADOBE_ID_CUSTOM;
          clazz               = cmap_classes->custom;
          break;

        case T1_ENCODING_TYPE_ISOLATIN1:
          charmap.encoding    = FT_ENCODING_ADOBE_LATIN_1;
          charmap.encoding_id = TT_ADOBE_ID_LATIN_1;
          clazz               = cmap_classes->unicode;
          break;

        default:
          ;
        }

        if ( clazz )
          FT_CMap_New( clazz, NULL, &charmap, NULL );

#if 0
        /* Select default charmap */
        if (root->num_charmaps)
          root->charmap = root->charmaps[0];
#endif
      }
    }

  Exit:
    return error;
  }


  /*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    T1_Driver_Init                                                     */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Initializes a given Type 1 driver object.                          */
  /*                                                                       */
  /* <Input>                                                               */
  /*    driver :: A handle to the target driver object.                    */
  /*                                                                       */
  /* <Return>                                                              */
  /*    FreeType error code.  0 means success.                             */
  /*                                                                       */
  FT_LOCAL_DEF( FT_Error )
  T1_Driver_Init( T1_Driver  driver )
  {
    FT_UNUSED( driver );

    return T1_Err_Ok;
  }


  /*************************************************************************/
  /*                                                                       */
  /* <Function>                                                            */
  /*    T1_Driver_Done                                                     */
  /*                                                                       */
  /* <Description>                                                         */
  /*    Finalizes a given Type 1 driver.                                   */
  /*                                                                       */
  /* <Input>                                                               */
  /*    driver :: A handle to the target Type 1 driver.                    */
  /*                                                                       */
  FT_LOCAL_DEF( void )
  T1_Driver_Done( T1_Driver  driver )
  {
    FT_UNUSED( driver );
  }


/* END */