gistfile1.php

<?php

/**
 * Implements hook_field_info_alter().
 *
 * Adding entity metadata wrapper support for the image field crop module.
 */
function os_profiles_field_info_alter(&$info) {
  $info['imagefield_crop'] += array(
    'property_type' => 'field_item_image',
    'property_callbacks' => array('nader'),
  );
}

/**
 * Additional callback to adapt the property info for file fields.
 * @see entity_metadata_field_entity_property_info().
 */
function nader(&$info, $entity_type, $field, $instance, $field_type) {
  $property = &$info[$entity_type]['bundles'][$instance['bundle']]['properties'][$field['field_name']];
  // Define a data structure so it's possible to deal with files and their
  // descriptions.
  $property['getter callback'] = 'entity_metadata_field_verbatim_get';
  $property['setter callback'] = 'entity_metadata_field_verbatim_set';
}