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#include "wanda/system/wallpaper.hpp"
#include "wanda/std_ext/optional.hpp"
#include "wanda/system/logging.hpp"
#include "wanda/system/magic.hpp"
#include "wanda/system/setting.hpp"
#include <boost/gil.hpp>
#include <boost/gil/extension/io/jpeg.hpp>
#include <boost/gil/extension/io/png.hpp>
#include <boost/gil/extension/numeric/resample.hpp>
#include <boost/gil/extension/numeric/sampler.hpp>
#include <spdlog/fmt/fmt.h>
#include <algorithm>
#include <cmath>
#include <memory>
namespace wanda::system
{
namespace
{
auto magic_instance = magic{};
auto load_image(std::filesystem::path wallpaper)
{
auto image = boost::gil::rgb8_image_t{};
switch (magic_instance.type(wallpaper))
{
case magic::mime_type::image_jpeg:
boost::gil::read_and_convert_image(wallpaper.native(), image, boost::gil::jpeg_tag{});
break;
case magic::mime_type::image_png:
boost::gil::read_and_convert_image(wallpaper.native(), image, boost::gil::png_tag{});
break;
}
return image;
}
auto average_colors(boost::gil::rgb8_image_t image)
{
auto accumulator = boost::gil::rgb64f_pixel_t{};
auto view = const_view(image);
std::ranges::for_each(view, [&](auto const & source_pixel) {
at_c<0>(accumulator) += std::pow(boost::gil::at_c<0>(source_pixel), 2);
at_c<1>(accumulator) += std::pow(boost::gil::at_c<1>(source_pixel), 2);
at_c<2>(accumulator) += std::pow(boost::gil::at_c<2>(source_pixel), 2);
});
at_c<0>(accumulator) = std::sqrt(at_c<0>(accumulator) / view.size());
at_c<1>(accumulator) = std::sqrt(at_c<1>(accumulator) / view.size());
at_c<2>(accumulator) = std::sqrt(at_c<2>(accumulator) / view.size());
return accumulator;
}
} // namespace
void set_wallpaper(std::filesystem::path wallpaper)
{
using namespace wanda::system::literals;
using namespace wanda::std_ext;
using namespace std::string_literals;
auto image = load_image(wallpaper);
auto color = average_colors(std::move(image));
auto hexstring = spdlog::fmt_lib::format("#{:02X}{:02X}{:02X}",
static_cast<std::uint8_t>(at_c<0>(color)),
static_cast<std::uint8_t>(at_c<1>(color)),
static_cast<std::uint8_t>(at_c<2>(color)));
with("org.gnome.desktop.background"_setting, [&](auto & setting) {
with(setting["primary-color"_key], [&](auto & value) {
value = hexstring;
});
with(setting["picture-uri"_key], [&](auto & value) {
value = "file://" + wallpaper.native();
}) ||
[&] { get_logger()->error("invalid settings key"); };
with(setting["picture-uri-dark"_key], [&](auto & value) {
value = "file://" + wallpaper.native();
}) ||
[&] { get_logger()->error("invalid settings key"); };
}) ||
[&] { get_logger()->error("invalid setting"); };
}
} // namespace wanda::system
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