af_glyph_hints_reload	(	AF_GlyphHints	hints,
		FT_Outline *	outline
	)
Definition at line 439 of file afhints.c.
Referenced by af_latin2_hints_apply(), af_latin2_metrics_init_widths(), af_latin_hints_apply(), and af_latin_metrics_init_widths().
  {
    FT_Error   error   = AF_Err_Ok;
    AF_Point   points;
    FT_UInt    old_max, new_max;
    FT_Fixed   x_scale = hints->x_scale;
    FT_Fixed   y_scale = hints->y_scale;
    FT_Pos     x_delta = hints->x_delta;
    FT_Pos     y_delta = hints->y_delta;
    FT_Memory  memory  = hints->memory;


    hints->num_points   = 0;
    hints->num_contours = 0;

    hints->axis[0].num_segments = 0;
    hints->axis[0].num_edges    = 0;
    hints->axis[1].num_segments = 0;
    hints->axis[1].num_edges    = 0;

    /* first of all, reallocate the contours array when necessary */
    new_max = (FT_UInt)outline->n_contours;
    old_max = hints->max_contours;
    if ( new_max > old_max )
    {
      new_max = ( new_max + 3 ) & ~3;

      if ( FT_RENEW_ARRAY( hints->contours, old_max, new_max ) )
        goto Exit;

      hints->max_contours = new_max;
    }

    /*
     *  then reallocate the points arrays if necessary --
     *  note that we reserve two additional point positions, used to
     *  hint metrics appropriately
     */
    new_max = (FT_UInt)( outline->n_points + 2 );
    old_max = hints->max_points;
    if ( new_max > old_max )
    {
      new_max = ( new_max + 2 + 7 ) & ~7;

      if ( FT_RENEW_ARRAY( hints->points, old_max, new_max ) )
        goto Exit;

      hints->max_points = new_max;
    }

    hints->num_points   = outline->n_points;
    hints->num_contours = outline->n_contours;

    /* We can't rely on the value of `FT_Outline.flags' to know the fill   */
    /* direction used for a glyph, given that some fonts are broken (e.g., */
    /* the Arphic ones).  We thus recompute it each time we need to.       */
    /*                                                                     */
    hints->axis[AF_DIMENSION_HORZ].major_dir = AF_DIR_UP;
    hints->axis[AF_DIMENSION_VERT].major_dir = AF_DIR_LEFT;

    if ( FT_Outline_Get_Orientation( outline ) == FT_ORIENTATION_POSTSCRIPT )
    {
      hints->axis[AF_DIMENSION_HORZ].major_dir = AF_DIR_DOWN;
      hints->axis[AF_DIMENSION_VERT].major_dir = AF_DIR_RIGHT;
    }

    hints->x_scale = x_scale;
    hints->y_scale = y_scale;
    hints->x_delta = x_delta;
    hints->y_delta = y_delta;

    hints->xmin_delta = 0;
    hints->xmax_delta = 0;

    points = hints->points;
    if ( hints->num_points == 0 )
      goto Exit;

    {
      AF_Point  point;
      AF_Point  point_limit = points + hints->num_points;


      /* compute coordinates & Bezier flags, next and prev */
      {
        FT_Vector*  vec           = outline->points;
        char*       tag           = outline->tags;
        AF_Point    end           = points + outline->contours[0];
        AF_Point    prev          = end;
        FT_Int      contour_index = 0;


        for ( point = points; point < point_limit; point++, vec++, tag++ )
        {
          point->fx = (FT_Short)vec->x;
          point->fy = (FT_Short)vec->y;
          point->ox = point->x = FT_MulFix( vec->x, x_scale ) + x_delta;
          point->oy = point->y = FT_MulFix( vec->y, y_scale ) + y_delta;

          switch ( FT_CURVE_TAG( *tag ) )
          {
          case FT_CURVE_TAG_CONIC:
            point->flags = AF_FLAG_CONIC;
            break;
          case FT_CURVE_TAG_CUBIC:
            point->flags = AF_FLAG_CUBIC;
            break;
          default:
            point->flags = 0;
          }

          point->prev = prev;
          prev->next  = point;
          prev        = point;

          if ( point == end )
          {
            if ( ++contour_index < outline->n_contours )
            {
              end  = points + outline->contours[contour_index];
              prev = end;
            }
          }
        }
      }

      /* set-up the contours array */
      {
        AF_Point*  contour       = hints->contours;
        AF_Point*  contour_limit = contour + hints->num_contours;
        short*     end           = outline->contours;
        short      idx           = 0;


        for ( ; contour < contour_limit; contour++, end++ )
        {
          contour[0] = points + idx;
          idx        = (short)( end[0] + 1 );
        }
      }

      /* compute directions of in & out vectors */
      {
        AF_Point      first  = points;
        AF_Point      prev   = NULL;
        FT_Pos        in_x   = 0;
        FT_Pos        in_y   = 0;
        AF_Direction  in_dir = AF_DIR_NONE;


        for ( point = points; point < point_limit; point++ )
        {
          AF_Point  next;
          FT_Pos    out_x, out_y;


          if ( point == first )
          {
            prev   = first->prev;
            in_x   = first->fx - prev->fx;
            in_y   = first->fy - prev->fy;
            in_dir = af_direction_compute( in_x, in_y );
            first  = prev + 1;
          }

          point->in_dir = (FT_Char)in_dir;

          next  = point->next;
          out_x = next->fx - point->fx;
          out_y = next->fy - point->fy;

          in_dir         = af_direction_compute( out_x, out_y );
          point->out_dir = (FT_Char)in_dir;

          if ( point->flags & ( AF_FLAG_CONIC | AF_FLAG_CUBIC ) )
          {
          Is_Weak_Point:
            point->flags |= AF_FLAG_WEAK_INTERPOLATION;
          }
          else if ( point->out_dir == point->in_dir )
          {
            if ( point->out_dir != AF_DIR_NONE )
              goto Is_Weak_Point;

            if ( ft_corner_is_flat( in_x, in_y, out_x, out_y ) )
              goto Is_Weak_Point;
          }
          else if ( point->in_dir == -point->out_dir )
            goto Is_Weak_Point;

          in_x = out_x;
          in_y = out_y;
          prev = point;
        }
      }
    }

  Exit:
    return error;
  }
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