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<?php
/**
* @package ZtShortcodes
* @author Viet Vu <info@crefly.com>
* @copyright JOOservices Ltd
* @license GNU General Public License version 2 or later; see LICENSE.txt
*
* @version 0.5.0
* @since 0.5.0
*/
defined('_JEXEC') or die;
/**
* Class exists checking
*/
if (!class_exists('ZtShortcodesImagerAbstract'))
{
/**
* Image process abstract class
*/
abstract class ZtShortcodesImagerAbstract extends JObject
{
/**
*
* @var image resource
*/
protected $_resource;
/**
* Original image width
* @var float
*/
protected $_imageWidth;
/**
* Original image height
* @var float
*/
protected $_imageHeight;
/**
* Image mime
* @var string
*/
protected $_imageMime;
/**
* Image physical path
* @var string
*/
protected $_imageFile;
/**
*
* @var array
*/
protected $_allowExtensions = array('jpg', 'jpeg', 'gif', 'png');
/**
*
* @param type $properties
*/
public function __construct($properties = null)
{
parent::__construct($properties);
/* Default properties */
$this->def('transparent', true);
}
public function loadFromUrl($url, $overwrite = false, $tempFolder = null)
{
if (is_null($tempFolder))
{
$tempFolder = JPATH_ROOT . '/tmp/crex/media';
}
if (!JFolder::exists($tempFolder))
{
JFolder::create($tempFolder);
}
$fileExtension = JFile::getExt($url);
$filePath = $tempFolder . '/' . md5($url) . '.' . $fileExtension;
if (!JFile::exists($filePath) || $overwrite == true)
{
$fileHandeler = fopen($filePath, 'w+');
$curlHandeler = curl_init(str_replace(" ", "%20", $url));
curl_setopt($curlHandeler, CURLOPT_TIMEOUT, 50);
curl_setopt($curlHandeler, CURLOPT_FILE, $fileHandeler);
curl_setopt($curlHandeler, CURLOPT_FOLLOWLOCATION, true);
curl_exec($curlHandeler);
curl_close($curlHandeler);
fclose($fileHandeler);
}
if (JFile::exists($filePath))
{
$this->loadFile($filePath);
} else
{
$this->setError(JText::_('CREX_ERROR_FILE_NOT_FOUND'));
}
return $this;
}
/**
* Get ZtShortcodesImageSizer
* We will use it calc new image size
* @return \ZtShortcodesImagerSizer
*/
public function getImageSizer()
{
$resizer = new ZtShortcodesImagerSizer($this->getWidth(), $this->getHeight());
return $resizer;
}
/**
* Load image from physcial file
* @uses For GD we can use loadFromString
*/
abstract public function loadFile($imageFile);
/**
* Get original width
* @return float
*/
public function getOriginalWidth()
{
return $this->_imageWidth;
}
/**
* Get current width
* @return float
*/
abstract public function getWidth();
/**
* Get original height
* @return float
*/
public function getOriginalHeight()
{
return $this->_imageHeight;
}
/**
* Get current height
* @return float
*/
abstract public function getHeight();
/**
* Extract exif data
* @return array
*/
abstract public function getExif();
abstract protected function _setWatermark($imager, $options = array());
/**
* Do image resize with sizer input
*/
abstract protected function _resize($sizer);
abstract protected function _crop($sizer);
/**
* Resize image to fit with maxWidth & maxHeight
*/
abstract public function fit($maxWidth, $maxHeight);
abstract public function ratio($newWidth, $newHeight);
abstract public function resize($newWidth, $newHeight);
abstract public function crop($newWidth, $newHeight, $options = array());
abstract public function thumbnail($newWidth, $newHeight);
abstract public function addWatermark($imageFile, $options = array());
abstract public function addText($text, $options = array());
/**
* Apply effect to image resource
*/
abstract function effect($type, $times = 1);
abstract function saveToFile($saveFile, $type, $quality);
abstract function render($type, $quality);
/**
* Resource manager
*/
abstract function getResource();
protected function _isError()
{
if (count($this->_errors) > 0)
return true;
else
return false;
}
/**
*
* @param type $imageFile
* @return type
*/
protected function _isAllowedExtensions($imageFile)
{
$ext = strtolower(JFile::getExt($imageFile));
return in_array($ext, $this->_allowExtensions);
}
/**
*
* @return boolean
*/
protected function _isValidResource()
{
$empty = $this->getResource();
return (!empty($empty));
}
abstract function closeResource();
/**
* Release memory by destroy image resource
*/
public function __destruct()
{
$this->closeResource();
}
}
}