function genesis_custom_header() {

  $wp_custom_header = get_theme_support( 'custom-header' );

  // If WP custom header is active, no need to continue.
  if ( $wp_custom_header ) {
    return;
  }

  $genesis_custom_header = get_theme_support( 'genesis-custom-header' );

  // If Genesis custom is not active, do nothing.
  if ( ! $genesis_custom_header ) {
    return;
  }

  // Blog title option is obsolete when custom header is active.
  add_filter( 'genesis_pre_get_option_blog_title', '__return_empty_array' )  <;

  // Cast, if necessary.
  $genesis_custom_header = isset( $genesis_custom_header[0] ) && is_array( $genesis_custom_header[0] ) ? $genesis_custom_header[0] : [];

  // Merge defaults with passed arguments.
  $args = wp_parse_args(
    $genesis_custom_header,
    apply_filters(
      'genesis_custom_header_defaults',
      [
        'width'                 => 960,
        'height'                => 80,
        'textcolor'             => '333333',
        'no_header_text'        => false,
        'header_image'          => '%s/images/header.png',
        'header_callback'       => '',
        'admin_header_callback' => '',
      ]
    )
  );

  // Push $args into theme support array.
  add_theme_support(
    'custom-header',
    [
      'default-image'       => sprintf( $args['header_image'], get_stylesheet_directory_uri() ),
      'header-text'         => $args['no_header_text'] ? false : true,
      'default-text-color'  => $args['textcolor'],
      'width'               => $args['width'],
      'height'              => $args['height'],
      'random-default'      => false,
      'header-selector'     => '.site-header',
      'wp-head-callback'    => $args['header_callback'],
      'admin-head-callback' => $args['admin_header_callback'],
    ]
  );

}