cidgload.c

奇趣公司比较新的qt/emd版本

    PSAux_Service  psaux = (PSAux_Service)face->psaux;


    *max_advance = 0;

    /* Initialize load decoder */
    error = psaux->t1_decoder_funcs->init( &decoder,
                                           (FT_Face)face,
                                           0, /* size       */
                                           0, /* glyph slot */
                                           0, /* glyph names! XXX */
                                           0, /* blend == 0 */
                                           0, /* hinting == 0 */
                                           cid_load_glyph );
    if ( error )
      return error;

    /* TODO: initialize decoder.len_buildchar and decoder.buildchar */
    /*       if we ever support CID-keyed multiple master fonts     */

    decoder.builder.metrics_only = 1;
    decoder.builder.load_points  = 0;

    /* for each glyph, parse the glyph charstring and extract */
    /* the advance width                                      */
    for ( glyph_index = 0; glyph_index < face->root.num_glyphs;
          glyph_index++ )
    {
      /* now get load the unscaled outline */
      error = cid_load_glyph( &decoder, glyph_index );
      /* ignore the error if one occurred - skip to next glyph */
    }

    *max_advance = decoder.builder.advance.x;

    psaux->t1_decoder_funcs->done( &decoder );

    return CID_Err_Ok;
  }


#endif /* 0 */


  FT_LOCAL_DEF( FT_Error )
  cid_slot_load_glyph( FT_GlyphSlot  cidglyph,      /* CID_GlyphSlot */
                       FT_Size       cidsize,       /* CID_Size      */
                       FT_UInt       glyph_index,
                       FT_Int32      load_flags )
  {
    CID_GlyphSlot  glyph = (CID_GlyphSlot)cidglyph;
    CID_Size       size  = (CID_Size)cidsize;
    FT_Error       error;
    T1_DecoderRec  decoder;
    CID_Face       face = (CID_Face)cidglyph->face;
    FT_Bool        hinting;

    PSAux_Service  psaux = (PSAux_Service)face->psaux;
    FT_Matrix      font_matrix;
    FT_Vector      font_offset;


    if ( glyph_index >= (FT_UInt)face->root.num_glyphs )
    {
      error = CID_Err_Invalid_Argument;
      goto Exit;
    }

    if ( load_flags & FT_LOAD_NO_RECURSE )
      load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING;

    glyph->x_scale = cidsize->metrics.x_scale;
    glyph->y_scale = cidsize->metrics.y_scale;

    cidglyph->outline.n_points   = 0;
    cidglyph->outline.n_contours = 0;

    hinting = FT_BOOL( ( load_flags & FT_LOAD_NO_SCALE   ) == 0 &&
                       ( load_flags & FT_LOAD_NO_HINTING ) == 0 );

    cidglyph->format = FT_GLYPH_FORMAT_OUTLINE;

    error = psaux->t1_decoder_funcs->init( &decoder,
                                           cidglyph->face,
                                           cidsize,
                                           cidglyph,
                                           0, /* glyph names -- XXX */
                                           0, /* blend == 0 */
                                           hinting,
                                           FT_LOAD_TARGET_MODE( load_flags ),
                                           cid_load_glyph );
    if ( error )
      goto Exit;

    /* TODO: initialize decoder.len_buildchar and decoder.buildchar */
    /*       if we ever support CID-keyed multiple master fonts     */

    /* set up the decoder */
    decoder.builder.no_recurse = FT_BOOL(
      ( ( load_flags & FT_LOAD_NO_RECURSE ) != 0 ) );

    error = cid_load_glyph( &decoder, glyph_index );
    if ( error )
      goto Exit;

    font_matrix = decoder.font_matrix;
    font_offset = decoder.font_offset;

    /* save new glyph tables */
    psaux->t1_decoder_funcs->done( &decoder );

    /* now set the metrics -- this is rather simple, as    */
    /* the left side bearing is the xMin, and the top side */
    /* bearing the yMax                                    */
    cidglyph->outline.flags &= FT_OUTLINE_OWNER;
    cidglyph->outline.flags |= FT_OUTLINE_REVERSE_FILL;

    /* for composite glyphs, return only left side bearing and */
    /* advance width                                           */
    if ( load_flags & FT_LOAD_NO_RECURSE )
    {
      FT_Slot_Internal  internal = cidglyph->internal;


      cidglyph->metrics.horiBearingX = decoder.builder.left_bearing.x;
      cidglyph->metrics.horiAdvance  = decoder.builder.advance.x;

      internal->glyph_matrix      = font_matrix;
      internal->glyph_delta       = font_offset;
      internal->glyph_transformed = 1;
    }
    else
    {
      FT_BBox            cbox;
      FT_Glyph_Metrics*  metrics = &cidglyph->metrics;
      FT_Vector          advance;


      /* copy the _unscaled_ advance width */
      metrics->horiAdvance                  = decoder.builder.advance.x;
      cidglyph->linearHoriAdvance           = decoder.builder.advance.x;
      cidglyph->internal->glyph_transformed = 0;

      /* make up vertical ones */
      metrics->vertAdvance        = ( face->cid.font_bbox.yMax -
                                      face->cid.font_bbox.yMin ) >> 16;
      cidglyph->linearVertAdvance = metrics->vertAdvance;

      cidglyph->format            = FT_GLYPH_FORMAT_OUTLINE;

      if ( size && cidsize->metrics.y_ppem < 24 )
        cidglyph->outline.flags |= FT_OUTLINE_HIGH_PRECISION;

      /* apply the font matrix */
      FT_Outline_Transform( &cidglyph->outline, &font_matrix );

      FT_Outline_Translate( &cidglyph->outline,
                            font_offset.x,
                            font_offset.y );

      advance.x = metrics->horiAdvance;
      advance.y = 0;
      FT_Vector_Transform( &advance, &font_matrix );
      metrics->horiAdvance = advance.x + font_offset.x;

      advance.x = 0;
      advance.y = metrics->vertAdvance;
      FT_Vector_Transform( &advance, &font_matrix );
      metrics->vertAdvance = advance.y + font_offset.y;

      if ( ( load_flags & FT_LOAD_NO_SCALE ) == 0 )
      {
        /* scale the outline and the metrics */
        FT_Int       n;
        FT_Outline*  cur = decoder.builder.base;
        FT_Vector*   vec = cur->points;
        FT_Fixed     x_scale = glyph->x_scale;
        FT_Fixed     y_scale = glyph->y_scale;


        /* First of all, scale the points */
        if ( !hinting || !decoder.builder.hints_funcs )
          for ( n = cur->n_points; n > 0; n--, vec++ )
          {
            vec->x = FT_MulFix( vec->x, x_scale );
            vec->y = FT_MulFix( vec->y, y_scale );
          }

        /* Then scale the metrics */
        metrics->horiAdvance = FT_MulFix( metrics->horiAdvance, x_scale );
        metrics->vertAdvance = FT_MulFix( metrics->vertAdvance, y_scale );
      }

      /* compute the other metrics */
      FT_Outline_Get_CBox( &cidglyph->outline, &cbox );

      metrics->width  = cbox.xMax - cbox.xMin;
      metrics->height = cbox.yMax - cbox.yMin;

      metrics->horiBearingX = cbox.xMin;
      metrics->horiBearingY = cbox.yMax;

      /* make up vertical ones */
      ft_synthesize_vertical_metrics( metrics,
                                      metrics->vertAdvance );
    }

  Exit:
    return error;
  }


/* END */