public span_image_filter_gray_bilinear(source_type src, interpolator_type inter) : base(src, inter, 0) {}
public span_image_resample_gray(source_type src, interpolator_type inter, image_filter_lut filter) : base(src, inter, filter) {}
public span_image_filter_gray_2x2(source_type src, interpolator_type inter, image_filter_lut filter) : base(src, inter, &filter) {}
public span_image_filter_gray_bilinear_clip(source_type src, color_type back_color, interpolator_type inter) : base(src, inter, 0) { m_back_color = (back_color); }
public span_image_filter_gray(source_type src, interpolator_type inter, image_filter_lut filter) : base(src, inter, filter) { }
public span_image_filter_gray_bilinear(source_type src, interpolator_type inter) : base(src, inter, 0) { }