82 lines
2.8 KiB
C++
82 lines
2.8 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) 2017 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_VIEW_HPP
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#define MAPNIK_IMAGE_VIEW_HPP
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#include <mapnik/image.hpp>
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namespace mapnik {
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template <typename T>
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class image_view
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{
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public:
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using pixel = typename T::pixel;
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using pixel_type = typename T::pixel_type;
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static constexpr image_dtype dtype = T::dtype;
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static constexpr std::size_t pixel_size = sizeof(pixel_type);
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image_view(std::size_t x, std::size_t y, std::size_t width, std::size_t height, T const& data);
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bool operator==(image_view<T> const& rhs) const;
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bool operator<(image_view<T> const& rhs) const;
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std::size_t x() const;
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std::size_t y() const;
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std::size_t width() const;
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std::size_t height() const;
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pixel_type const& operator() (std::size_t i, std::size_t j) const;
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std::size_t size() const;
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std::size_t row_size() const;
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pixel_type const* get_row(std::size_t row) const;
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pixel_type const* get_row(std::size_t row, std::size_t x0) const;
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T const& data() const;
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bool get_premultiplied() const;
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double get_offset() const;
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double get_scaling() const;
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image_dtype get_dtype() const;
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private:
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std::size_t x_;
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std::size_t y_;
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std::size_t width_;
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std::size_t height_;
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T const& data_;
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};
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using image_view_null = image_view<image_null>;
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using image_view_rgba8 = image_view<image_rgba8>;
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using image_view_gray8 = image_view<image_gray8>;
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using image_view_gray8s = image_view<image_gray8s>;
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using image_view_gray16 = image_view<image_gray16>;
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using image_view_gray16s = image_view<image_gray16s>;
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using image_view_gray32 = image_view<image_gray32>;
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using image_view_gray32s = image_view<image_gray32s>;
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using image_view_gray32f = image_view<image_gray32f>;
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using image_view_gray64 = image_view<image_gray64>;
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using image_view_gray64s = image_view<image_gray64s>;
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using image_view_gray64f = image_view<image_gray64f>;
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} // end ns
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#endif // MAPNIK_IMAGE_VIEW_HPP
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