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ReactOS Development > Doxygen

af_latin_metrics_init_widths ( AF_LatinMetrics  metrics,
FT_Face  face,
FT_ULong  charcode 
)

Definition at line 40 of file aflatin.c.

Referenced by af_latin_metrics_init().

  {
    /* scan the array of segments in each direction */
    AF_GlyphHintsRec  hints[1];


    af_glyph_hints_init( hints, face->memory );

    metrics->axis[AF_DIMENSION_HORZ].width_count = 0;
    metrics->axis[AF_DIMENSION_VERT].width_count = 0;

    {
      FT_Error             error;
      FT_UInt              glyph_index;
      int                  dim;
      AF_LatinMetricsRec   dummy[1];
      AF_Scaler            scaler = &dummy->root.scaler;


      glyph_index = FT_Get_Char_Index( face, charcode );
      if ( glyph_index == 0 )
        goto Exit;

      error = FT_Load_Glyph( face, glyph_index, FT_LOAD_NO_SCALE );
      if ( error || face->glyph->outline.n_points <= 0 )
        goto Exit;

      FT_ZERO( dummy );

      dummy->units_per_em = metrics->units_per_em;
      scaler->x_scale     = scaler->y_scale = 0x10000L;
      scaler->x_delta     = scaler->y_delta = 0;
      scaler->face        = face;
      scaler->render_mode = FT_RENDER_MODE_NORMAL;
      scaler->flags       = 0;

      af_glyph_hints_rescale( hints, (AF_ScriptMetrics)dummy );

      error = af_glyph_hints_reload( hints, &face->glyph->outline );
      if ( error )
        goto Exit;

      for ( dim = 0; dim < AF_DIMENSION_MAX; dim++ )
      {
        AF_LatinAxis  axis    = &metrics->axis[dim];
        AF_AxisHints  axhints = &hints->axis[dim];
        AF_Segment    seg, limit, link;
        FT_UInt       num_widths = 0;


        error = af_latin_hints_compute_segments( hints,
                                                 (AF_Dimension)dim );
        if ( error )
          goto Exit;

        af_latin_hints_link_segments( hints,
                                      (AF_Dimension)dim );

        seg   = axhints->segments;
        limit = seg + axhints->num_segments;

        for ( ; seg < limit; seg++ )
        {
          link = seg->link;

          /* we only consider stem segments there! */
          if ( link && link->link == seg && link > seg )
          {
            FT_Pos  dist;


            dist = seg->pos - link->pos;
            if ( dist < 0 )
              dist = -dist;

            if ( num_widths < AF_LATIN_MAX_WIDTHS )
              axis->widths[ num_widths++ ].org = dist;
          }
        }

        af_sort_widths( num_widths, axis->widths );
        axis->width_count = num_widths;
      }

  Exit:
      for ( dim = 0; dim < AF_DIMENSION_MAX; dim++ )
      {
        AF_LatinAxis  axis = &metrics->axis[dim];
        FT_Pos        stdw;


        stdw = ( axis->width_count > 0 )
                 ? axis->widths[0].org
                 : AF_LATIN_CONSTANT( metrics, 50 );

        /* let's try 20% of the smallest width */
        axis->edge_distance_threshold = stdw / 5;
        axis->standard_width          = stdw;
        axis->extra_light             = 0;
      }
    }

    af_glyph_hints_done( hints );
  }

Generated on Sat May 26 2012 05:59:01 for ReactOS by doxygen 1.7.6.1

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