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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('ZtShortcodesImagerSizer')) {
/**
* Image sizer class
* Used to calc new width & height and X/Y values from source
*/
class ZtShortcodesImagerSizer {
private $_srcWidth;
private $_srcHeight;
private $_srcRatio;
private $_newWidth;
private $_newHeight;
private $_srcX;
private $_srcY;
public function __construct($width, $height) {
$this->_srcWidth = $width;
$this->_srcHeight = $height;
/* By default we init new width & height same with source */
$this->_newWidth = $width;
$this->_newHeight = $height;
$this->_srcX = 0;
$this->_srcY = 0;
$this->_srcRatio = $this->_srcWidth / $this->_srcHeight;
}
/**
* Force to resize with new width & height
* @param type $newWidth
* @param type $newHeight
* @return \ZtShortcodesImagerSizer
*/
public function resize($newWidth, $newHeight) {
if ($this->_isValid()) {
$this->_newWidth = $newWidth;
$this->_newHeight = $newHeight;
}
return $this;
}
/**
* Do resize to fit max width & height
* @param type $maxWidth
* @param type $maxHeight
* @return \ZtShortcodesImagerSizer
*/
public function fit($maxWidth, $maxHeight) {
if ($this->_isValid()) {
if ($this->_newWidth > $maxWidth) {
$this->ratio($maxWidth, 0);
$this->fit($this->_newWidth, $maxHeight);
}
if ($this->_newHeight > $maxHeight) {
$this->ratio(0, $maxHeight);
$this->fit($maxWidth, $this->_newHeight);
}
}
return $this;
}
/**
* Do resize by follow source ratio
* @param type $newWidth
* @param type $newHeight
*/
public function ratio($newWidth, $newHeight) {
if ($this->_isValid()) {
/* Keep image size */
if ($newWidth == 0 && $this->_isUnit($newHeight)) {
$this->_newWidth = $newHeight * $this->_srcRatio;
$this->_newHeight = $newHeight;
} else if ($newHeight == 0 && $this->_isUnit($newWidth)) {
$this->_newHeight = $newWidth / $this->_srcRatio;
$this->_newWidth = $newWidth;
}
}
return $this;
}
/**
* Crop source image from XY with new size
* @param type $newWidth
* @param type $newHeight
* @param type $srcX
* @param type $srcY
*/
public function crop($newWidth, $newHeight, $srcX = 0, $srcY = 0) {
if ($this->_isValid()) {
if ($this->_isUnit($newWidth) && $this->_isUnit($newHeight) && $this->_isUnit($srcX) && $this->_isUnit($srcY) && $srcX < $this->_srcWidth && $srcY < $this->_srcHeight) {
/**
* @todo Make sure new width & new height from X/Y will not over than source width & height
*/
$this->resize($newWidth, $newHeight);
$this->_srcX = $srcX;
$this->_srcY = $srcY;
}
}
return $this;
}
public function getPosition($width, $height, $cmd) {
if ($this->_isValid()) {
$x = 0;
$y = 0;
switch ($cmd) {
case 'center':
$x = $this->_srcWidth / 2 - $width / 2;
$y = $this->_srcHeight / 2 - $height / 2;
break;
case 'top-left':
//Nothing
break;
case 'top-middle':
$x = $this->_srcWidth / 2 - $width / 2;
break;
case 'top-right':
$x = $this->_srcWidth - $width;
break;
case 'left-middle':
$y = $this->_srcHeight / 2 - $height / 2;
break;
case 'right-middle':
$x = $this->_srcWidth - $width;
$y = $this->_srcHeight / 2 - $height / 2;
break;
case 'bottom-left':
$y = $this->_srcHeight - $height;
break;
case 'bottom-middle':
$x = $this->_srcWidth / 2 - $width / 2;
$y = $this->_srcHeight - $height;
break;
case 'bottom-right':
$x = $this->_srcWidth - $width;
$y = $this->_srcHeight - $height;
break;
}
$this->resize($width, $height);
$this->_srcX = $x;
$this->_srcY = $y;
}
return $this;
}
/**
* Get get position in current image
* @param type $newImager
* @param type $cmd
* @return type
*/
public function getWatermarkPosition($imager, $cmd) {
if ($this->_isValid()) {
$this->getPosition($imager->getWidth(), $imager->getHeight(), $cmd);
}
return $this;
}
/**
* Check a value is valid width/height unit
* @param any $value
* @return boolean
*/
private function _isUnit($value) {
return is_numeric($value) && $value > 0;
}
/**
* Check image size is valid
* @return boolean
*/
private function _isValid() {
return $this->_isUnit($this->_srcWidth) && $this->_isUnit($this->_srcHeight);
}
/**
* Get width
* @return float
*/
public function getWidth() {
return $this->_newWidth;
}
/**
* Get height
* @return float
*/
public function getHeight() {
return $this->_newHeight;
}
/**
* Get source X
* @return float
*/
public function getX() {
return $this->_srcX;
}
/**
* Get source Y
* @return float
*/
public function getY() {
return $this->_srcY;
}
}
}