void Calculate(Imaging.IImageFilter filter, bool normalization)
 {
     double r = filter.GetRadius();
     ReallocLut(r);
     int i;
     int pivot = Diameter << (ImgSubPixConst.SHIFT - 1);
     for (i = 0; i < pivot; i++)
     {
         double x = (double)i / (double)ImgSubPixConst.SCALE;
         double y = filter.CalculateWeight(x);
         m_weight_array[pivot + i] =
         m_weight_array[pivot - i] = AggBasics.iround(y * ImgFilterConst.SCALE);
     }
     int end = (Diameter << ImgSubPixConst.SHIFT) - 1;
     m_weight_array[0] = m_weight_array[end];
     if (normalization)
     {
         Normalize();
     }
 }