Function ReadPpmP6

ethos-u-corstone-1000/app/src/common/InputUtils.cpp:72–102

}

Image ReadPpmP6(const std::string& ppmPath)
{
    std::ifstream ppmStream(ppmPath, std::ios::binary);
    if (!ppmStream.is_open()) {
        throw std::runtime_error("failed to open PPM file: " + ppmPath);
    }

    const std::string magic = ReadPpmToken(ppmStream);
    if (magic != "P6") {
        throw std::runtime_error("only P6 PPM input is supported: " + ppmPath);
    }

    const int width  = std::stoi(ReadPpmToken(ppmStream));
    const int height = std::stoi(ReadPpmToken(ppmStream));
    const int maxVal = std::stoi(ReadPpmToken(ppmStream));
    if (width <= 0 || height <= 0 || maxVal != 255) {
        throw std::runtime_error("invalid PPM header values in: " + ppmPath);
    }

    ppmStream.get();

    const size_t bytes = static_cast<size_t>(width) * static_cast<size_t>(height) * 3U;
    std::vector<uint8_t> rgb(bytes);
    ppmStream.read(reinterpret_cast<char*>(rgb.data()), static_cast<std::streamsize>(bytes));

    if (static_cast<size_t>(ppmStream.gcount()) != bytes) {
        throw std::runtime_error("PPM payload size mismatch in: " + ppmPath);
    }

    return Image{width, height, std::move(rgb)};
}

Image ReadBmp24(const std::string& bmpPath)
{