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#include "pixels.h"
#include <execution>
#include <filesystem>
#include <fstream>
#include <iostream>
Pixels& Pixels::operator+=(const Pixels& other)
{
std::transform(
std::execution::par,
pixels.begin(),
pixels.end(),
other.pixels.begin(),
pixels.begin(),
// [](auto& toAdd) { return dst += src; });
std::plus<>()
);
return *this;
}
Pixels& Pixels::operator/=(const float divider)
{
std::for_each(
std::execution::par_unseq,
pixels.begin(),
pixels.end(),
[divider](auto& pixel) { pixel /= divider; }
);
return *this;
}
std::optional<Pixels> Pixels::load(const QString& filename)
{
const std::filesystem::path filepath{filename.toStdString()};
if (!std::filesystem::exists(filepath))
{
std::cerr << "no such file: " << filepath << std::endl;
return {};
}
std::ifstream ifs(filepath, std::ios::in | std::ios::binary);
if (!ifs)
return {};
Pixels result;
ifs.read(reinterpret_cast<char*>(&result), sizeof(Pixels));
ifs.close();
if (!ifs)
{
std::cerr << "cannot read " << filepath << std::endl;
return {};
}
return result;
}
bool Pixels::save(const QString& filename)
{
const std::filesystem::path filepath{filename.toStdString()};
const auto parent_path = filepath.parent_path();
if (!std::filesystem::exists(parent_path) &&
!std::filesystem::create_directories(parent_path))
{
std::cerr << "cannot create parent directory for file " << filepath
<< std::endl;
return false;
}
std::ofstream ofs(filepath, std::ios::out | std::ios::binary);
if (!ofs)
return false;
ofs.write(reinterpret_cast<const char*>(this), sizeof(Pixels));
ofs.close();
if (!ofs)
{
std::cerr << "cannot write " << filepath << std::endl;
return false;
}
return true;
}
Pixels::operator bool() const
{
return std::find_if(pixels.cbegin(), pixels.cend(), [](const auto& p) {
return !qFuzzyIsNull(p) && !std::isnan(p);
}) != pixels.cend();
}
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