/*
 * This file is part of libgim.
 *
 * libgim 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.
 *
 * libgim 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 GNU General Public License
 * along with libgim.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Copyright 2011-2015 Danny Robson <danny@nerdcruft.net>
 */

#ifndef __UTIL_IMAGE_HPP
#define __UTIL_IMAGE_HPP

#include <cstdint>
#include <cstdlib>
#include <memory>
#include <boost/filesystem/path.hpp>


namespace util {
    namespace image {
        template <typename T>
        struct buffer {
            typedef T value_type;

            buffer (size_t w, size_t h);
            buffer (size_t w, size_t h, size_t s);
            buffer (size_t w, size_t h, size_t s, std::unique_ptr<T[]> &&data);

            buffer (const buffer<T>&) = delete;
            buffer (buffer<T> &&) = default;

            void fill (T);

            template <typename U>
            buffer<U> alloc (void) const;

            template <typename U>
            buffer<U> clone (void) const;

            buffer<T> downsample (float factor) const;

            size_t w;
            size_t h;
            size_t s;

            std::unique_ptr<T[]> data;
        };
    }


    struct pgm {
        static image::buffer<uint8_t> read (const boost::filesystem::path&);

        static void write (const image::buffer<uint8_t> &src,
                           const boost::filesystem::path &);

        static void write (const uint8_t *restrict pixels,
                           size_t width,
                           size_t height,
                           size_t stride,
                           const boost::filesystem::path &path);
    };

    struct ppm {
        static void write (const uint8_t *restrict pixels,
                           size_t width,
                           size_t height,
                           size_t stride,
                           const boost::filesystem::path &path);
    };
}

#endif