Drupal modules for browsing and managing Fedora-based digital repositories.
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<?php
/**
* @file image.process.inc
*
* This file contains all the functions for image manipulation used in the
* basic image solution pack.
*/
/**
* creates the derivatives for this content model type
* @param object $object
* tuque FedoraObject
* @return string
*/
function islandora_basic_image_create_all_derivatives($object) {
module_load_include('inc', 'islandora', 'includes/mime.detect');
module_load_include('inc', 'islandora_basic_image', 'includes/image_process');
$mime_class = new MimeDetect();
if (!isset($object['OBJ'])) {
drupal_set_message(t('Could not create image derivatives for %s. No image file was uploaded.', array('%s' => $object->id)),'error');
return "";
}
$ext = $mime_class->getExtension($object['OBJ']->mimeType);
$file_name = str_replace(':', '-', $object->id);
$original_file = file_save_data($object['OBJ']->content, 'temporary://' . $file_name . 'OBJ.' . $ext);
$tn_file = file_copy($original_file, 'temporary://' . $file_name . 'TN.' . $ext);
if (islandora_basic_image_create_derivative($tn_file, 200, 200)) {
islandora_basic_image_add_datastream($object, 'TN', $tn_file);
}
$medium_file = file_copy($original_file, 'temporary://' . $file_name . 'MEDIUM.' . $ext);
if (islandora_basic_image_create_derivative($medium_file, 500, 700)) {
islandora_basic_image_add_datastream($object, 'MEDIUM_SIZE', $medium_file);
}
file_delete($original_file);
}
/**
*
* @param object $file
* stdclass
*/
function islandora_basic_image_create_derivative($file, $width, $height) {
$real_path = drupal_realpath($file->uri);
$image = image_load($real_path);
if (!empty($image)) {
$scale = image_scale($image, $width, $height, TRUE);
if ($scale) {
return image_save($image);
}
}
return FALSE;
}
/**
* adds a datastream and deletes the tmp file from local file system
* @param object $object
* @param string $dsid
* @param object $file
*/
function islandora_basic_image_add_datastream($object, $dsid, $file) {
try {
$ds = $object->constructDatastream($dsid, 'M');
$ds->label = $dsid;
$ds->mimeType = $object['OBJ']->mimeType;
$ds->setContentFromFile(drupal_realpath($file->uri));
$object->ingestDatastream($ds);
file_delete($file);
} catch (exception $e) {
drupal_set_message(t('@message', array('@message' => check_plain($e->getMessage()))), 'error');
}
}