cffobjs.c.svn-base

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          y_scale = size->metrics.y_scale;
        }

        funcs->set_scale( internal->subfonts[i - 1],
                          x_scale, y_scale, 0, 0 );
      }
    }

    return CFF_Err_Ok;
  }


  /*************************************************************************/
  /*                                                                       */
  /*                            SLOT  FUNCTIONS                            */
  /*                                                                       */
  /*************************************************************************/

  FT_LOCAL_DEF( void )
  cff_slot_done( FT_GlyphSlot  slot )
  {
    slot->internal->glyph_hints = 0;
  }


  FT_LOCAL_DEF( FT_Error )
  cff_slot_init( FT_GlyphSlot  slot )
  {
    CFF_Face          face     = (CFF_Face)slot->face;
    CFF_Font          font     = (CFF_Font)face->extra.data;
    PSHinter_Service  pshinter = (PSHinter_Service)font->pshinter;


    if ( pshinter )
    {
      FT_Module  module;


      module = FT_Get_Module( slot->face->driver->root.library,
                              "pshinter" );
      if ( module )
      {
        T2_Hints_Funcs  funcs;


        funcs = pshinter->get_t2_funcs( module );
        slot->internal->glyph_hints = (void*)funcs;
      }
    }

    return CFF_Err_Ok;
  }


  /*************************************************************************/
  /*                                                                       */
  /*                           FACE  FUNCTIONS                             */
  /*                                                                       */
  /*************************************************************************/

  static FT_String*
  cff_strcpy( FT_Memory         memory,
              const FT_String*  source )
  {
    FT_Error    error;
    FT_String*  result;


    (void)FT_STRDUP( result, source );

    FT_UNUSED( error );

    return result;
  }


  FT_LOCAL_DEF( FT_Error )
  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;


#if 0
    FT_FACE_FIND_GLOBAL_SERVICE( face, sfnt,     SFNT );
    FT_FACE_FIND_GLOBAL_SERVICE( face, psnames,  POSTSCRIPT_NAMES );
    FT_FACE_FIND_GLOBAL_SERVICE( face, pshinter, POSTSCRIPT_HINTER );

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

    FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );

    pshinter = (PSHinter_Service)FT_Get_Module_Interface(
                 cffface->driver->root.library, "pshinter" );
#endif

    /* 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 != 0x4F54544FL )  /* `OTTO'; OpenType/CFF font */
      {
        FT_TRACE2(( "[not a valid OpenType/CFF font]\n" ));
        goto Bad_Format;
      }

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

      /* UNDOCUMENTED!  A CFF in an SFNT can have only a single font. */
      if ( face_index > 0 )
      {
        FT_ERROR(( "cff_face_init: invalid face index\n" ));
        error = CFF_Err_Invalid_Argument;
        goto Exit;
      }

      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;

        /* XXX: we don't load the GPOS table, as OpenType Layout     */
        /* support will be added later to a layout library on top of */
        /* FreeType 2                                                */
      }

      /* 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 = CFF_Err_Ok;
    }

    /* now load and parse the CFF table in the file */
    {
      CFF_Font         cff;
      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( stream, face_index, cff );
      if ( error )
        goto Exit;

      cff->pshinter = pshinter;
      cff->psnames  = (void*)psnames;

      /* 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:" ));
        FT_ERROR(( " cannot open CFF & CEF fonts\n" ));
        FT_ERROR(( "              " ));
        FT_ERROR(( " without the `PSNames' module\n" ));
        goto Bad_Format;
      }

      if ( !dict->units_per_em )
        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->units_per_em )
        {
          FT_Int  scaling;


          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 );

          /* if *upm is larger than 100*1000 we divide by 1000 --     */
          /* this can happen if e.g. there is no top-font FontMatrix  */
          /* and the subfont FontMatrix already contains the complete */
          /* scaling for the subfont (see section 5.11 of the PLRM)   */

          /* 100 is a heuristic value */

          if ( *upm > 100L * 1000L )
            *upm = ( *upm + 500 ) / 1000;

          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;
      }