<?php

/**
 * Implements hook_permission().
 */
function materio_title_access_permission() {
	$perms = array();
	$entity_infos = entity_get_info();
	foreach ($entity_infos['node']['bundles'] as $bundle => $value) {
  	$perms['show '.$bundle.' title'] = array(
  		'title' => t('Show !bundle node title.', array('!bundle'=>$value['label'])),
  	);
  }
	return $perms;
}


/**
 * Implements hook_field_access().
 */
function materio_title_access_field_access($op, $field, $entity_type, $entity, $account) {
  /*
   *if ($field['field_name'] == 'field_of_interest' && $op == 'edit') {
   *  return user_access('edit field of interest', $account);
   *}
   */
  /* Your code here */
  // dsm($entity, 'entity');
  // dsm($entity_type, 'entity_type');

  if($field['field_name'] == 'title_field' && $entity_type == 'node' && isset($entity->type)){
  	return user_access('show '.$entity->type.' title');
  }

  return TRUE;
}