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/home/develito/httpdocs/modules/mod_bm_articles_tab/libs/image.php

<?php
/**
 * @package     Joomla.Platform
 * @subpackage  Image
 *
 * @copyright   Copyright (C) 2005 - 2013 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE
 */

defined('JPATH_PLATFORM') or die;

/**
 * Class to manipulate an image.
 *
 * @package     Joomla.Platform
 * @subpackage  Image
 * @since       11.3
 */
if(!class_exists("JoomlaImage")){
	class JoomlaImage
	{
		/**
		 * @const  integer
		 * @since  11.3
		 */
		const SCALE_FILL = 1;

/**
		 * @const  integer
		 * @since  11.3
		 */
		const SCALE_INSIDE = 2;

/**
		 * @const  integer
		 * @since  11.3
		 */
		const SCALE_OUTSIDE = 3;

/**
		 * @const  integer
		 * @since  12.2
		 */
		const CROP = 4;

/**
		 * @const  integer
		 * @since  12.3
		 */
		const CROP_RESIZE = 5;

/**
		 * @var    resource  The image resource handle.
		 * @since  11.3
		 */
		protected $handle;

/**
		 * @var    string  The source image path.
		 * @since  11.3
		 */
		protected $path = null;

/**
		 * @var    array  Whether or not different image formats are supported.
		 * @since  11.3
		 */
		protected static $formats = array();

/**
		 * Class constructor.
		 *
		 * @param   mixed  $source  Either a file path for a source image or a GD resource handler for an image.
		 *
		 * @since   11.3
		 * @throws  RuntimeException
		 */
		public function __construct($source = null)
		{
			// Verify that GD support for PHP is available.
			if (!extension_loaded('gd'))
			{
				// @codeCoverageIgnoreStart
				JLog::add('The GD extension for PHP is not available.', JLog::ERROR);
				throw new RuntimeException('The GD extension for PHP is not available.');

// @codeCoverageIgnoreEnd
			}

// Determine which image types are supported by GD, but only once.
			if (!isset(self::$formats[IMAGETYPE_JPEG]))
			{
				$info = gd_info();
				self::$formats[IMAGETYPE_JPEG] = ($info['JPEG Support']) ? true : false;
				self::$formats[IMAGETYPE_PNG] = ($info['PNG Support']) ? true : false;
				self::$formats[IMAGETYPE_GIF] = ($info['GIF Read Support']) ? true : false;
			}

// If the source input is a resource, set it as the image handle.
			if (is_resource($source) && (get_resource_type($source) == 'gd'))
			{
				$this->handle = &$source;
			}
			elseif (!empty($source) && is_string($source))
			{
				// If the source input is not empty, assume it is a path and populate the image handle.
				$this->loadFile($source);
			}
		}

/**
		 * Method to return a properties object for an image given a filesystem path.  The
		 * result object has values for image width, height, type, attributes, mime type, bits,
		 * and channels.
		 *
		 * @param   string  $path  The filesystem path to the image for which to get properties.
		 *
		 * @return  stdClass
		 *
		 * @since   11.3
		 * @throws  InvalidArgumentException
		 * @throws  RuntimeException
		 */
		public static function getImageFileProperties($path)
		{
			// Make sure the file exists.
			if (!file_exists($path))
			{
				throw new InvalidArgumentException('The image file does not exist.');
			}

// Get the image file information.
			$info = getimagesize($path);

if (!$info)
			{
				// @codeCoverageIgnoreStart
				throw new RuntimeException('Unable to get properties for the image.');

// @codeCoverageIgnoreEnd
			}

// Build the response object.
			$properties = (object) array(
				'width' => $info[0],
				'height' => $info[1],
				'type' => $info[2],
				'attributes' => $info[3],
				'bits' => isset($info['bits']) ? $info['bits'] : null,
				'channels' => isset($info['channels']) ? $info['channels'] : null,
				'mime' => $info['mime']
			);

return $properties;
		}

/**
		 * Method to generate thumbnails from the current image. It allows
		 * creation by resizing or cropping the original image.
		 *
		 * @param   mixed    $thumbSizes      String or array of strings. Example: $thumbSizes = array('150x75','250x150');
		 * @param   integer  $creationMethod  1-3 resize $scaleMethod | 4 create croppping | 5 resize then crop
		 *
		 * @return array
		 *
		 * @throws  LogicException
		 * @throws  InvalidArgumentException
		 *
		 * @since 12.2
		 */
		public function generateThumbs($thumbSizes, $creationMethod = self::SCALE_INSIDE)
		{
			// Make sure the resource handle is valid.
			if (!$this->isLoaded())
			{
				throw new LogicException('No valid image was loaded.');
			}

// Accept a single thumbsize string as parameter
			if (!is_array($thumbSizes))
			{
				$thumbSizes = array($thumbSizes);
			}

// Process thumbs
			$generated = array();

if (!empty($thumbSizes))
			{
				foreach ($thumbSizes as $thumbSize)
				{
					// Desired thumbnail size
					$size = explode('x', strtolower($thumbSize));

if (count($size) != 2)
					{
						throw new InvalidArgumentException('Invalid thumb size received: ' . $thumbSize);
					}
					$thumbWidth 	= $size[0];
					$thumbHeight	= $size[1];

switch ($creationMethod)
					{
						// Case for self::CROP
						case 4:
							$thumb = $this->crop($thumbWidth, $thumbHeight, null, null, true);
							break;

// Case for self::CROP_RESIZE
						case 5:
							$thumb = $this->cropResize($thumbWidth, $thumbHeight, true);
							break;

default:
							$thumb = $this->resize($thumbWidth, $thumbHeight, true, $creationMethod);
							break;
					}

// Store the thumb in the results array
					$generated[] = $thumb;
				}
			}

return $generated;
		}

/**
		 * Method to create thumbnails from the current image and save them to disk. It allows creation by resizing
		 * or croppping the original image.
		 *
		 * @param   mixed    $thumbSizes      string or array of strings. Example: $thumbSizes = array('150x75','250x150');
		 * @param   integer  $creationMethod  1-3 resize $scaleMethod | 4 create croppping
		 * @param   string   $thumbsFolder    destination thumbs folder. null generates a thumbs folder in the image folder
		 *
		 * @return array
		 *
		 * @throws  LogicException
		 * @throws  InvalidArgumentException
		 *
		 * @since 12.2
		 */
		public function createThumbs($thumbSizes, $creationMethod = self::SCALE_INSIDE, $thumbsFolder = null)
		{
			// Make sure the resource handle is valid.
			if (!$this->isLoaded())
			{
				throw new LogicException('No valid image was loaded.');
			}

// No thumbFolder set -> we will create a thumbs folder in the current image folder
			if (is_null($thumbsFolder))
			{
				$thumbsFolder = dirname($this->getPath()) . '/thumbs';
			}

// Check destination
			if (!is_dir($thumbsFolder) && (!is_dir(dirname($thumbsFolder)) || !@mkdir($thumbsFolder)))
			{
				throw new InvalidArgumentException('Folder does not exist and cannot be created: ' . $thumbsFolder);
			}

// Process thumbs
			$thumbsCreated = array();

if ($thumbs = $this->generateThumbs($thumbSizes, $creationMethod))
			{
				// Parent image properties
				$imgProperties = self::getImageFileProperties($this->getPath());

foreach ($thumbs as $thumb)
				{
					// Get thumb properties
					$thumbWidth 	= $thumb->getWidth();
					$thumbHeight 	= $thumb->getHeight();

// Generate thumb name
					$filename 		= pathinfo($this->getPath(), PATHINFO_FILENAME);
					$fileExtension 	= pathinfo($this->getPath(), PATHINFO_EXTENSION);
					$thumbFileName 	= $filename . '_' . $thumbWidth . 'x' . $thumbHeight . '.' . $fileExtension;

// Save thumb file to disk
					$thumbFileName = $thumbsFolder . '/' . $thumbFileName;

if ($thumb->toFile($thumbFileName, $imgProperties->type))
					{
						// Return JoomlaImage object with thumb path to ease further manipulation
						$thumb->path = $thumbFileName;
						$thumbsCreated[] = $thumb;
					}
				}
			}
			return $thumbsCreated;
		}

/**
		 * Method to crop the current image.
		 *
		 * @param   mixed    $width      The width of the image section to crop in pixels or a percentage.
		 * @param   mixed    $height     The height of the image section to crop in pixels or a percentage.
		 * @param   integer  $left       The number of pixels from the left to start cropping.
		 * @param   integer  $top        The number of pixels from the top to start cropping.
		 * @param   bool     $createNew  If true the current image will be cloned, cropped and returned; else
		 *                               the current image will be cropped and returned.
		 *
		 * @return  JoomlaImage
		 *
		 * @since   11.3
		 * @throws  LogicException
		 */
		public function crop($width, $height, $left = null, $top = null, $createNew = true)
		{
			// Make sure the resource handle is valid.
			if (!$this->isLoaded())
			{
				throw new LogicException('No valid image was loaded.');
			}

// Sanitize width.
			$width = $this->sanitizeWidth($width, $height);

// Sanitize height.
			$height = $this->sanitizeHeight($height, $width);

// Autocrop offsets
			if (is_null($left))
			{
				$left = round(($this->getWidth() - $width) / 2);
			}
			if (is_null($top))
			{
				$top = round(($this->getHeight() - $height) / 2);
			}

// Sanitize left.
			$left = $this->sanitizeOffset($left);

// Sanitize top.
			$top = $this->sanitizeOffset($top);

// Create the new truecolor image handle.
			$handle = imagecreatetruecolor($width, $height);

// Allow transparency for the new image handle.
			imagealphablending($handle, false);
			imagesavealpha($handle, true);

if ($this->isTransparent())
			{
				// Get the transparent color values for the current image.
				$rgba = imageColorsForIndex($this->handle, imagecolortransparent($this->handle));
				$color = imageColorAllocate($this->handle, $rgba['red'], $rgba['green'], $rgba['blue']);

// Set the transparent color values for the new image.
				imagecolortransparent($handle, $color);
				imagefill($handle, 0, 0, $color);

imagecopyresized($handle, $this->handle, 0, 0, $left, $top, $width, $height, $width, $height);
			}
			else
			{
				imagecopyresampled($handle, $this->handle, 0, 0, $left, $top, $width, $height, $width, $height);
			}

// If we are cropping to a new image, create a new JoomlaImage object.
			if ($createNew)
			{
				// @codeCoverageIgnoreStart
				$new = new JoomlaImage($handle);

return $new;

// @codeCoverageIgnoreEnd
			}
			// Swap out the current handle for the new image handle.
			else
			{
				// Free the memory from the current handle
				$this->destroy();

$this->handle = $handle;

return $this;
			}
		}

/**
		 * Method to apply a filter to the image by type.  Two examples are: grayscale and sketchy.
		 *
		 * @param   string  $type     The name of the image filter to apply.
		 * @param   array   $options  An array of options for the filter.
		 *
		 * @return  JoomlaImage
		 *
		 * @since   11.3
		 * @see     JoomlaImageFilter
		 * @throws  LogicException
		 * @throws  RuntimeException
		 */
		public function filter($type, array $options = array())
		{
			// Make sure the resource handle is valid.
			if (!$this->isLoaded())
			{
				throw new LogicException('No valid image was loaded.');
			}

// Get the image filter instance.
			$filter = $this->getFilterInstance($type);

// Execute the image filter.
			$filter->execute($options);

return $this;
		}

/**
		 * Method to get the height of the image in pixels.
		 *
		 * @return  integer
		 *
		 * @since   11.3
		 * @throws  LogicException
		 */
		public function getHeight()
		{
			// Make sure the resource handle is valid.
			if (!$this->isLoaded())
			{
				throw new LogicException('No valid image was loaded.');
			}

return imagesy($this->handle);
		}

/**
		 * Method to get the width of the image in pixels.
		 *
		 * @return  integer
		 *
		 * @since   11.3
		 * @throws  LogicException
		 */
		public function getWidth()
		{
			// Make sure the resource handle is valid.
			if (!$this->isLoaded())
			{
				throw new LogicException('No valid image was loaded.');
			}

return imagesx($this->handle);
		}

/**
		 * Method to return the path
		 *
		 * @return	string
		 *
		 * @since	11.3
		 */
		public function getPath()
		{
			return $this->path;
		}

/**
		 * Method to determine whether or not an image has been loaded into the object.
		 *
		 * @return  bool
		 *
		 * @since   11.3
		 */
		public function isLoaded()
		{
			// Make sure the resource handle is valid.
			if (!is_resource($this->handle) || (get_resource_type($this->handle) != 'gd'))
			{
				return false;
			}

return true;
		}

/**
		 * Method to determine whether or not the image has transparency.
		 *
		 * @return  bool
		 *
		 * @since   11.3
		 * @throws  LogicException
		 */
		public function isTransparent()
		{
			// Make sure the resource handle is valid.
			if (!$this->isLoaded())
			{
				throw new LogicException('No valid image was loaded.');
			}

return (imagecolortransparent($this->handle) >= 0);
		}

/**
		 * Method to load a file into the JoomlaImage object as the resource.
		 *
		 * @param   string  $path  The filesystem path to load as an image.
		 *
		 * @return  void
		 *
		 * @since   11.3
		 * @throws  InvalidArgumentException
		 * @throws  RuntimeException
		 */
		public function loadFile($path)
		{
			// Destroy the current image handle if it exists
			$this->destroy();
						   
			// Make sure the file exists.
			if (!file_exists($path))
			{
				throw new InvalidArgumentException('The image file does not exist.');
			}

// Get the image properties.
			$properties = self::getImageFileProperties($path);

// Attempt to load the image based on the MIME-Type
			switch ($properties->mime)
			{
				case 'image/gif':
					// Make sure the image type is supported.
					if (empty(self::$formats[IMAGETYPE_GIF]))
					{
						// @codeCoverageIgnoreStart
						JLog::add('Attempting to load an image of unsupported type GIF.', JLog::ERROR);
						throw new RuntimeException('Attempting to load an image of unsupported type GIF.');

// @codeCoverageIgnoreEnd
					}

// Attempt to create the image handle.
					$handle = imagecreatefromgif($path);

if (!is_resource($handle))
					{
						// @codeCoverageIgnoreStart
						throw new RuntimeException('Unable to process GIF image.');

// @codeCoverageIgnoreEnd
					}
					$this->handle = $handle;
					break;

case 'image/jpeg':
					// Make sure the image type is supported.
					if (empty(self::$formats[IMAGETYPE_JPEG]))
					{
						// @codeCoverageIgnoreStart
						JLog::add('Attempting to load an image of unsupported type JPG.', JLog::ERROR);
						throw new RuntimeException('Attempting to load an image of unsupported type JPG.');

// @codeCoverageIgnoreEnd
					}

// Attempt to create the image handle.
					$handle = imagecreatefromjpeg($path);

if (!is_resource($handle))
					{
						// @codeCoverageIgnoreStart
						throw new RuntimeException('Unable to process JPG image.');

// @codeCoverageIgnoreEnd
					}
					$this->handle = $handle;
					break;

case 'image/png':
					// Make sure the image type is supported.
					if (empty(self::$formats[IMAGETYPE_PNG]))
					{
						// @codeCoverageIgnoreStart
						JLog::add('Attempting to load an image of unsupported type PNG.', JLog::ERROR);
						throw new RuntimeException('Attempting to load an image of unsupported type PNG.');

// @codeCoverageIgnoreEnd
					}

// Attempt to create the image handle.
					$handle = imagecreatefrompng($path);

if (!is_resource($handle))
					{
						// @codeCoverageIgnoreStart
						throw new RuntimeException('Unable to process PNG image.');

// @codeCoverageIgnoreEnd
					}
					$this->handle = $handle;
					break;

default:
					JLog::add('Attempting to load an image of unsupported type: ' . $properties->mime, JLog::ERROR);
					throw new InvalidArgumentException('Attempting to load an image of unsupported type: ' . $properties->mime);
					break;
			}

// Set the filesystem path to the source image.
			$this->path = $path;
		}

/**
		 * Method to resize the current image.
		 *
		 * @param   mixed    $width        The width of the resized image in pixels or a percentage.
		 * @param   mixed    $height       The height of the resized image in pixels or a percentage.
		 * @param   bool     $createNew    If true the current image will be cloned, resized and returned; else
		 *                                 the current image will be resized and returned.
		 * @param   integer  $scaleMethod  Which method to use for scaling
		 *
		 * @return  JoomlaImage
		 *
		 * @since   11.3
		 * @throws  LogicException
		 */
		public function resize($width, $height, $createNew = true, $scaleMethod = self::SCALE_INSIDE)
		{               
			// Make sure the resource handle is valid.
			if (!$this->isLoaded())
			{
				throw new LogicException('No valid image was loaded.');
			}
						   
			// Sanitize width.
			$width = $this->sanitizeWidth($width, $height);

// Sanitize height.
			$height = $this->sanitizeHeight($height, $width);

// Prepare the dimensions for the resize operation.
			$dimensions = $this->prepareDimensions($width, $height, $scaleMethod);

// Create the new truecolor image handle.
			$handle = imagecreatetruecolor($dimensions->width, $dimensions->height);

// Allow transparency for the new image handle.
			imagealphablending($handle, false);
			imagesavealpha($handle, true);
								
			if ($this->isTransparent())
			{
				// Get the transparent color values for the current image.
				$rgba = imageColorsForIndex($this->handle, imagecolortransparent($this->handle));
				$color = imageColorAllocate($this->handle, $rgba['red'], $rgba['green'], $rgba['blue']);

// Set the transparent color values for the new image.
				imagecolortransparent($handle, $color);
				imagefill($handle, 0, 0, $color);

imagecopyresized($handle, $this->handle, 0, 0, 0, 0, $dimensions->width, $dimensions->height, $this->getWidth(), $this->getHeight());
			}
			else
			{
				imagecopyresampled($handle, $this->handle, 0, 0, 0, 0, $dimensions->width, $dimensions->height, $this->getWidth(), $this->getHeight());
			}

// If we are resizing to a new image, create a new JoomlaImage object.
			if ($createNew)
			{          
				// @codeCoverageIgnoreStart
				$new = new JoomlaImage($handle);
						
				return $new;

// @codeCoverageIgnoreEnd
			}
			// Swap out the current handle for the new image handle.
			else
			{
				// Free the memory from the current handle
				$this->destroy();

$this->handle = $handle;

return $this;
			}
		}

/**
		 * Method to crop an image after resizing it to maintain
		 * proportions without having to do all the set up work.
		 *
		 * @param   integer  $width      The desired width of the image in pixels or a percentage.
		 * @param   integer  $height     The desired height of the image in pixels or a percentage.
		 * @param   integer  $createNew  If true the current image will be cloned, resized, cropped and returned.
		 *
		 * @return  object  JoomlaImage Object for chaining.
		 *
		 * @since   12.3
		 */
		public function cropResize($width, $height, $createNew = true)
		{
			$width   = $this->sanitizeWidth($width, $height);
			$height  = $this->sanitizeHeight($height, $width);

if (($this->getWidth() / $width) < ($this->getHeight() / $height))
			{
				$this->resize($width, 0, false);
			}
			else
			{
				$this->resize(0, $height, false);
			}

return $this->crop($width, $height, null, null, $createNew);
		}

/**
		 * Method to rotate the current image.
		 *
		 * @param   mixed    $angle       The angle of rotation for the image
		 * @param   integer  $background  The background color to use when areas are added due to rotation
		 * @param   bool     $createNew   If true the current image will be cloned, rotated and returned; else
		 *                                the current image will be rotated and returned.
		 *
		 * @return  JoomlaImage
		 *
		 * @since   11.3
		 * @throws  LogicException
		 */
		public function rotate($angle, $background = -1, $createNew = true)
		{
			// Make sure the resource handle is valid.
			if (!$this->isLoaded())
			{
				throw new LogicException('No valid image was loaded.');
			}

// Sanitize input
			$angle = (float) $angle;

// Create the new truecolor image handle.
			$handle = imagecreatetruecolor($this->getWidth(), $this->getHeight());

// Allow transparency for the new image handle.
			imagealphablending($handle, false);
			imagesavealpha($handle, true);

// Copy the image
			imagecopy($handle, $this->handle, 0, 0, 0, 0, $this->getWidth(), $this->getHeight());

// Rotate the image
			$handle = imagerotate($handle, $angle, $background);

// If we are resizing to a new image, create a new JoomlaImage object.
			if ($createNew)
			{
				// @codeCoverageIgnoreStart
				$new = new JoomlaImage($handle);

return $new;

// @codeCoverageIgnoreEnd
			}
			// Swap out the current handle for the new image handle.
			else
			{
				// Free the memory from the current handle
				$this->destroy();

$this->handle = $handle;

return $this;
			}
		}

/**
		 * Method to write the current image out to a file.
		 *
		 * @param   string   $path     The filesystem path to save the image.
		 * @param   integer  $type     The image type to save the file as.
		 * @param   array    $options  The image type options to use in saving the file.
		 *
		 * @return  boolean
		 *
		 * @see     http://www.php.net/manual/image.constants.php
		 * @since   11.3
		 * @throws  LogicException
		 */
		public function toFile($path, $type = IMAGETYPE_JPEG, array $options = array())
		{
			// Make sure the resource handle is valid.
			if (!$this->isLoaded())
			{
				throw new LogicException('No valid image was loaded.');
			}

switch ($type)
			{
				case IMAGETYPE_GIF:
					return imagegif($this->handle, $path);
					break;

case IMAGETYPE_PNG:
					return imagepng($this->handle, $path, (array_key_exists('quality', $options)) ? $options['quality'] : 0);
					break;

case IMAGETYPE_JPEG:
				default:
					return imagejpeg($this->handle, $path, (array_key_exists('quality', $options)) ? $options['quality'] : 100);
			}
		}

/**
		 * Method to get an image filter instance of a specified type.
		 *
		 * @param   string  $type  The image filter type to get.
		 *
		 * @return  JoomlaImageFilter
		 *
		 * @since   11.3
		 * @throws  RuntimeException
		 */
		protected function getFilterInstance($type)
		{
			// Sanitize the filter type.
			$type = strtolower(preg_replace('#[^A-Z0-9_]#i', '', $type));

// Verify that the filter type exists.
			$className = 'JoomlaImageFilter' . ucfirst($type);

if (!class_exists($className))
			{
				JLog::add('The ' . ucfirst($type) . ' image filter is not available.', JLog::ERROR);
				throw new RuntimeException('The ' . ucfirst($type) . ' image filter is not available.');
			}

// Instantiate the filter object.
			$instance = new $className($this->handle);

// Verify that the filter type is valid.
			if (!($instance instanceof JoomlaImageFilter))
			{
				// @codeCoverageIgnoreStart
				JLog::add('The ' . ucfirst($type) . ' image filter is not valid.', JLog::ERROR);
				throw new RuntimeException('The ' . ucfirst($type) . ' image filter is not valid.');

// @codeCoverageIgnoreEnd
			}

return $instance;
		}

/**
		 * Method to get the new dimensions for a resized image.
		 *
		 * @param   integer  $width        The width of the resized image in pixels.
		 * @param   integer  $height       The height of the resized image in pixels.
		 * @param   integer  $scaleMethod  The method to use for scaling
		 *
		 * @return  stdClass
		 *
		 * @since   11.3
		 * @throws  InvalidArgumentException  If width, height or both given as zero
		 */
		protected function prepareDimensions($width, $height, $scaleMethod)
		{
			// Instantiate variables.
			$dimensions = new stdClass;

switch ($scaleMethod)
			{
				case self::SCALE_FILL:
					$dimensions->width = (int) round($width);
					$dimensions->height = (int) round($height);
					break;

case self::SCALE_INSIDE:
				case self::SCALE_OUTSIDE:
					$rx = ($width > 0) ? ($this->getWidth() / $width) : 0;
					$ry = ($height > 0) ? ($this->getHeight() / $height) : 0;

if ($scaleMethod == self::SCALE_INSIDE)
					{
						$ratio = ($rx > $ry) ? $rx : $ry;
					}
					else
					{
						$ratio = ($rx < $ry) ? $rx : $ry;
					}

$dimensions->width = (int) round($this->getWidth() / $ratio);
					$dimensions->height = (int) round($this->getHeight() / $ratio);
					break;

default:
					throw new InvalidArgumentException('Invalid scale method.');
					break;
			}

return $dimensions;
		}

/**
		 * Method to sanitize a height value.
		 *
		 * @param   mixed  $height  The input height value to sanitize.
		 * @param   mixed  $width   The input width value for reference.
		 *
		 * @return  integer
		 *
		 * @since   11.3
		 */
		protected function sanitizeHeight($height, $width)
		{
			// If no height was given we will assume it is a square and use the width.
			$height = ($height === null) ? $width : $height;

// If we were given a percentage, calculate the integer value.
			if (preg_match('/^[0-9]+(\.[0-9]+)?\%$/', $height))
			{
				$height = (int) round($this->getHeight() * (float) str_replace('%', '', $height) / 100);
			}
			// Else do some rounding so we come out with a sane integer value.
			else
			{
				$height = (int) round((float) $height);
			}

return $height;
		}

/**
		 * Method to sanitize an offset value like left or top.
		 *
		 * @param   mixed  $offset  An offset value.
		 *
		 * @return  integer
		 *
		 * @since   11.3
		 */
		protected function sanitizeOffset($offset)
		{
			return (int) round((float) $offset);
		}

/**
		 * Method to sanitize a width value.
		 *
		 * @param   mixed  $width   The input width value to sanitize.
		 * @param   mixed  $height  The input height value for reference.
		 *
		 * @return  integer
		 *
		 * @since   11.3
		 */
		protected function sanitizeWidth($width, $height)
		{
			// If no width was given we will assume it is a square and use the height.
			$width = ($width === null) ? $height : $width;

// If we were given a percentage, calculate the integer value.
			if (preg_match('/^[0-9]+(\.[0-9]+)?\%$/', $width))
			{
				$width = (int) round($this->getWidth() * (float) str_replace('%', '', $width) / 100);
			}
			// Else do some rounding so we come out with a sane integer value.
			else
			{
				$width = (int) round((float) $width);
			}

return $width;
		}

/**
		 * Method to destroy an image handle and
		 * free the memory associated with the handle
		 *
		 * @return  boolean  True on success, false on failure or if no image is loaded
		 *
		 * @since 12.3
		 */
		public function destroy()
		{
			if ($this->isLoaded())
			{
				return imagedestroy($this->handle);
			}

return false;
		}

/**
		 * Method to call the destroy() method one last time
		 * to free any memory when the object is unset
		 *
		 * @see     JoomlaImage::destroy()
		 */
		public function __destruct()
		{
			$this->destroy();
		}
	}
}