/**
* Return a OpenSeadragon image viewer for the provided files.
*
* @param File|array $files A File record or an array of File records.
* @param int $width The width of the image viewer in pixels.
* @param int $height The height of the image viewer in pixels.
* @return string|null
*/
public function openseadragon($files)
{
if (!is_array($files)) {
$files = array($files);
}
// Filter out invalid images.
$images = array();
$imageNames = array();
foreach ($files as $file) {
// A valid image must be a File record.
if (!$file instanceof File) {
continue;
}
// A valid image must have a supported extension.
$extension = pathinfo($file->original_filename, PATHINFO_EXTENSION);
if (!in_array(strtolower($extension), $this->_supportedExtensions)) {
continue;
}
$images[] = $file;
$imageNames[explode(".", $file->filename)[0]] = openseadragon_dimensions($file, 'original');
}
// Return if there are no valid images.
if (!$images) {
return;
}
return $this->view->partial('common/openseadragon.php', array('images' => $images, 'imageNames' => $imageNames));
}
function openseadragon_pyramid_level($image, $size = 'original')
{
$url = str_replace("%2F", "/", array('url' => $image->getWebPath($size)));
$dimensions = openseadragon_dimensions($image, $size);
$level = $url + $dimensions;
return $level;
}