Function get_channel_format

tests/Utils.h:164–175

Return the format of a channel. * * @param[in] channel Channel type. * * @return Format of the given channel. */

 * @return Format of the given channel.
 */
inline Format get_channel_format(Channel channel)
{
    switch (channel)
    {
        case Channel::R:
        case Channel::G:
        case Channel::B:
            return Format::U8;
        default:
            throw std::runtime_error("Unsupported channel");
    }
}

/** Base case of foldl.
 *