/usr/include/mapnik/image_view.hpp is in libmapnik-dev 3.0.9+ds-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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*
* This file is part of Mapnik (c++ mapping toolkit)
*
* Copyright (C) 2015 Artem Pavlenko
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
*****************************************************************************/
#ifndef MAPNIK_IMAGE_VIEW_HPP
#define MAPNIK_IMAGE_VIEW_HPP
#include <mapnik/image.hpp>
namespace mapnik {
template <typename T>
class image_view
{
public:
using pixel = typename T::pixel;
using pixel_type = typename T::pixel_type;
static constexpr image_dtype dtype = T::dtype;
static constexpr std::size_t pixel_size = sizeof(pixel_type);
image_view(std::size_t x, std::size_t y, std::size_t width, std::size_t height, T const& data);
~image_view();
image_view(image_view<T> const& rhs);
image_view(image_view<T> && other) noexcept;
image_view<T>& operator=(image_view<T> rhs) = delete;
bool operator==(image_view<T> const& rhs) const;
bool operator<(image_view<T> const& rhs) const;
std::size_t x() const;
std::size_t y() const;
std::size_t width() const;
std::size_t height() const;
pixel_type const& operator() (std::size_t i, std::size_t j) const;
std::size_t size() const;
std::size_t row_size() const;
pixel_type const* get_row(std::size_t row) const;
pixel_type const* get_row(std::size_t row, std::size_t x0) const;
T const& data() const;
bool get_premultiplied() const;
double get_offset() const;
double get_scaling() const;
image_dtype get_dtype() const;
private:
std::size_t x_;
std::size_t y_;
std::size_t width_;
std::size_t height_;
T const& data_;
};
using image_view_null = image_view<image_null>;
using image_view_rgba8 = image_view<image_rgba8>;
using image_view_gray8 = image_view<image_gray8>;
using image_view_gray8s = image_view<image_gray8s>;
using image_view_gray16 = image_view<image_gray16>;
using image_view_gray16s = image_view<image_gray16s>;
using image_view_gray32 = image_view<image_gray32>;
using image_view_gray32s = image_view<image_gray32s>;
using image_view_gray32f = image_view<image_gray32f>;
using image_view_gray64 = image_view<image_gray64>;
using image_view_gray64s = image_view<image_gray64s>;
using image_view_gray64f = image_view<image_gray64f>;
} // end ns
#endif // MAPNIK_IMAGE_VIEW_HPP
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