KernelPsf.h

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// -*- LSST-C++ -*-
/*
 * LSST Data Management System
 * Copyright 2008-2013 LSST Corporation.
 *
 * This product includes software developed by the
 * LSST Project (http://www.lsst.org/).
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the LSST License Statement and
 * the GNU General Public License along with this program.  If not,
 * see <http://www.lsstcorp.org/LegalNotices/>.
 */
#ifndef LSST_MEAS_ALGORITHMS_KernelPsf_h_INCLUDED
#define LSST_MEAS_ALGORITHMS_KernelPsf_h_INCLUDED
 
#include "lsst/geom/Box.h"
#include "lsst/meas/algorithms/ImagePsf.h"
 
namespace lsst {
namespace meas {
namespace algorithms {

class KernelPsf : public afw::table::io::PersistableFacade<KernelPsf>, public ImagePsf {
public:
    explicit KernelPsf(afw::math::Kernel const& kernel,
                       geom::Point2D const& averagePosition = geom::Point2D());

    std::shared_ptr<afw::math::Kernel const> getKernel() const { return _kernel; }

    geom::Point2D getAveragePosition() const override;

    std::shared_ptr<afw::detection::Psf> clone() const override;

    std::shared_ptr<afw::detection::Psf> resized(int width, int height) const override;

     bool isPersistable() const noexcept override;
 
protected:
    explicit KernelPsf(std::shared_ptr<afw::math::Kernel> kernel, geom::Point2D const& averagePosition = geom::Point2D());
 
    // Name to use persist this object as (should be overridden by derived classes).
    std::string getPersistenceName() const override;
 
    // Python module used in persistence to ensure factory is loaded.
    std::string getPythonModule() const override;
 
    // Output persistence implementation (should be overridden by derived classes if they add data members).
    void write(OutputArchiveHandle& handle) const override;
 
    // For access to protected ctor; avoids unnecessary copies when loading
    template <typename T, typename K>
    friend class KernelPsfFactory;
 
private:
    std::shared_ptr<Image>
    doComputeKernelImage(geom::Point2D const& position, afw::image::Color const& color) const override;
 
    geom::Box2I doComputeBBox(geom::Point2D const& position, afw::image::Color const& color) const override;
 
    std::shared_ptr<afw::math::Kernel> _kernel;
    geom::Point2D _averagePosition;
};
 
}  // namespace algorithms
}  // namespace meas
}  // namespace lsst
 
#endif  // !LSST_MEAS_ALGORITHMS_KernelPsf_h_INCLUDED