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/home/develito/www/libraries-new/vendor/joomla/image/src/Image.php

<?php
/**
 * Part of the Joomla Framework Image Package
 *
 * @copyright  Copyright (C) 2005 - 2018 Open Source Matters, Inc. All rights reserved.
 * @license    GNU General Public License version 2 or later; see LICENSE
 */

namespace Joomla\Image;

use Psr\Log\NullLogger;
use Psr\Log\LoggerInterface;
use Psr\Log\LoggerAwareInterface;

/**
 * Class to manipulate an image.
 *
 * @since       1.0
 * @deprecated  The joomla/image package is deprecated
 */
class Image implements LoggerAwareInterface
{
	/**
	 * @const  integer
	 * @since  1.0
	 */
	const SCALE_FILL = 1;

/**
	 * @const  integer
	 * @since  1.0
	 */
	const SCALE_INSIDE = 2;

/**
	 * @const  integer
	 * @since  1.0
	 */
	const SCALE_OUTSIDE = 3;

/**
	 * @const  integer
	 * @since  1.0
	 */
	const CROP = 4;

/**
	 * @const  integer
	 * @since  1.0
	 */
	const CROP_RESIZE = 5;

/**
	 * @const  integer
	 * @since  1.0
	 */
	const SCALE_FIT = 6;

/**
	 * @const  string
	 * @since  1.2.0
	 */
	const ORIENTATION_LANDSCAPE = 'landscape';

/**
	 * @const  string
	 * @since  1.2.0
	 */
	const ORIENTATION_PORTRAIT = 'portrait';

/**
	 * @const  string
	 * @since  1.2.0
	 */
	const ORIENTATION_SQUARE = 'square';

/**
	 * @var    resource  The image resource handle.
	 * @since  1.0
	 */
	protected $handle;

/**
	 * @var    string  The source image path.
	 * @since  1.0
	 */
	protected $path = null;

/**
	 * @var    array  Whether or not different image formats are supported.
	 * @since  1.0
	 */
	protected static $formats = array();

/**
	 * @var    LoggerInterface  Logger object
	 * @since  1.0
	 */
	protected $logger = null;

/**
	 * @var    boolean  Flag if an image should use the best quality available.  Disable for improved performance.
	 * @since  1.4.0
	 */
	protected $generateBestQuality = true;

/**
	 * Class constructor.
	 *
	 * @param   mixed  $source  Either a file path for a source image or a GD resource handler for an image.
	 *
	 * @since   1.0
	 * @throws  \RuntimeException
	 */
	public function __construct($source = null)
	{
		// Verify that GD support for PHP is available.
		if (!extension_loaded('gd'))
		{
			// @codeCoverageIgnoreStart
			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(static::$formats[IMAGETYPE_JPEG]))
		{
			$info = gd_info();
			static::$formats[IMAGETYPE_JPEG] = ($info['JPEG Support']) ? true : false;
			static::$formats[IMAGETYPE_PNG] = ($info['PNG Support']) ? true : false;
			static::$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);
		}
	}

/**
	 * Get the image resource handle
	 *
	 * @return  resource
	 *
	 * @since   1.3.0
	 * @throws  \LogicException if an image has not been loaded into the instance
	 */
	public function getHandle()
	{
		// Make sure the resource handle is valid.
		if (!$this->isLoaded())
		{
			throw new \LogicException('No valid image was loaded.');
		}

return $this->handle;
	}

/**
	 * Get the logger.
	 *
	 * @return  LoggerInterface
	 *
	 * @since   1.0
	 */
	public function getLogger()
	{
		// If a logger hasn't been set, use NullLogger
		if (! ($this->logger instanceof LoggerInterface))
		{
			$this->logger = new NullLogger;
		}

return $this->logger;
	}

/**
	 * Sets a logger instance on the object
	 *
	 * @param   LoggerInterface  $logger  A PSR-3 compliant logger.
	 *
	 * @return  Image  This object for message chaining.
	 *
	 * @since   1.0
	 */
	public function setLogger(LoggerInterface $logger)
	{
		$this->logger = $logger;

return $this;
	}

/**
	 * 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  $path  The filesystem path to the image for which to get properties.
	 *
	 * @return  \stdClass
	 *
	 * @since   1.0
	 * @throws  \InvalidArgumentException
	 * @throws  \RuntimeException
	 */
	public static function getImageFileProperties($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'        => $info['mime'],
			'filesize'    => filesize($path),
			'orientation' => self::getOrientationString((int) $info[0], (int) $info[1]),
		);

return $properties;
	}

/**
	 * Method to detect whether an image's orientation is landscape, portrait or square.
	 *
	 * The orientation will be returned as a string.
	 *
	 * @return  mixed   Orientation string or null.
	 *
	 * @since   1.2.0
	 */
	public function getOrientation()
	{
		if ($this->isLoaded())
		{
			return self::getOrientationString($this->getWidth(), $this->getHeight());
		}

return null;
	}

/**
	 * Compare width and height integers to determine image orientation.
	 *
	 * @param   integer  $width   The width value to use for calculation
	 * @param   integer  $height  The height value to use for calculation
	 *
	 * @return  string   Orientation string
	 *
	 * @since   1.2.0
	 */
	private static function getOrientationString($width, $height)
	{
		switch (true)
		{
			case ($width > $height) :
				return self::ORIENTATION_LANDSCAPE;

case ($width < $height) :
				return self::ORIENTATION_PORTRAIT;

default:
				return self::ORIENTATION_SQUARE;
		}
	}

/**
	 * 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 $scaleMethod | 4 create cropping | 5 resize then crop
	 *
	 * @return  array
	 *
	 * @since   1.0
	 * @throws  \LogicException
	 * @throws  \InvalidArgumentException
	 */
	public function generateThumbs($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 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 cropping
	 * @param   string   $thumbsFolder    destination thumbs folder. null generates a thumbs folder in the image folder
	 *
	 * @return  array
	 *
	 * @since   1.0
	 * @throws  \LogicException
	 * @throws  \InvalidArgumentException
	 */
	public function createThumbs($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
			$imgProperties = static::getImageFileProperties($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 Image 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   boolean  $createNew  If true the current image will be cloned, cropped and returned; else
	 *                               the current image will be cropped and returned.
	 *
	 * @return  Image
	 *
	 * @since   1.0
	 * @throws  \LogicException
	 */
	public function crop($width, $height, $left = null, $top = null, $createNew = true)
	{
		// 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->getHandle(), imagecolortransparent($this->getHandle()));
			$color = imagecolorallocatealpha($handle, $rgba['red'], $rgba['green'], $rgba['blue'], $rgba['alpha']);

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

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

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

// @codeCoverageIgnoreEnd
		}

// Swap out the current handle for the new image 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   $options  An array of options for the filter.
	 *
	 * @return  Image
	 *
	 * @since   1.0
	 * @see     Joomla\Image\Filter
	 * @throws  \LogicException
	 */
	public function filter($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   1.0
	 * @throws  \LogicException
	 */
	public function getHeight()
	{
		return imagesy($this->getHandle());
	}

/**
	 * Method to get the width of the image in pixels.
	 *
	 * @return  integer
	 *
	 * @since   1.0
	 * @throws  \LogicException
	 */
	public function getWidth()
	{
		return imagesx($this->getHandle());
	}

/**
	 * Method to return the path
	 *
	 * @return	string
	 *
	 * @since	1.0
	 */
	public function getPath()
	{
		return $this->path;
	}

/**
	 * Method to determine whether or not an image has been loaded into the object.
	 *
	 * @return  boolean
	 *
	 * @since   1.0
	 */
	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  boolean
	 *
	 * @since   1.0
	 * @throws  \LogicException
	 */
	public function isTransparent()
	{
		return imagecolortransparent($this->getHandle()) >= 0;
	}

/**
	 * Method to load a file into the Image object as the resource.
	 *
	 * @param   string  $path  The filesystem path to load as an image.
	 *
	 * @return  void
	 *
	 * @since   1.0
	 * @throws  \InvalidArgumentException
	 * @throws  \RuntimeException
	 */
	public function loadFile($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.
		$properties = static::getImageFileProperties($path);

// Attempt to load the image based on the MIME-Type
		switch ($properties->mime)
		{
			case 'image/gif':
				// Make sure the image type is supported.
				if (empty(static::$formats[IMAGETYPE_GIF]))
				{
					// @codeCoverageIgnoreStart
					$this->getLogger()->error('Attempting to load an image of unsupported type GIF.');

throw new \RuntimeException('Attempting to load an image of unsupported type GIF.');