79 lines
2.9 KiB
C++
79 lines
2.9 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2014 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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#ifndef MAPNIK_IMAGE_NULL_HPP
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#define MAPNIK_IMAGE_NULL_HPP
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// mapnik
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#include <mapnik/config.hpp>
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#include <mapnik/pixel_types.hpp>
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//stl
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#include <stdexcept>
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namespace mapnik
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{
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template <>
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class MAPNIK_DECL image<null_t>
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{
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public:
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using pixel_type = null_t::type;
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static const image_dtype dtype = null_t::id;
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private:
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public:
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image() {}
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image(int width,
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int height,
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bool initialize = true,
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bool premultiplied = false,
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bool painted = false) {}
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image(image<null_t> const& rhs) {}
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image(image<null_t> && rhs) noexcept {}
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image<null_t>& operator=(image<null_t> rhs) { return *this; }
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image<null_t>const& operator=(image<null_t> const& rhs) const { return rhs; }
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bool operator==(image<null_t> const& rhs) const { return true; }
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bool operator<(image<null_t> const& rhs) const { return false; }
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std::size_t width() const { return 0; }
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std::size_t height() const { return 0; }
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std::size_t size() const { return 0; }
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std::size_t row_size() const { return 0; }
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void set(pixel_type const& t) { throw std::runtime_error("Can not set values for null image"); }
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pixel_type& operator() (std::size_t i, std::size_t j) { throw std::runtime_error("Can not get or set values for null image"); }
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pixel_type const& operator() (std::size_t i, std::size_t j) const { throw std::runtime_error("Can not get or set values for null image"); }
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unsigned const char* bytes() const { return nullptr; }
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unsigned char* bytes() {return nullptr; }
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double get_offset() const { return 0.0; }
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void set_offset(double set) {}
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double get_scaling() const { return 1.0; }
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void set_scaling(double set) {}
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bool get_premultiplied() const { return false; }
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void set_premultiplied(bool set) {}
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void painted(bool painted) {}
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bool painted() const { return false; }
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image_dtype get_dtype() const { return dtype; }
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};
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} // end ns mapnik
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#endif // MAPNIK_IMAGE_NULL_HPP
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