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<?php
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/**
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* PhpThumb GD Thumb Class Definition File
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*
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* This file contains the definition for the GdThumb object
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*
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* PHP Version 5 with GD 2.0+
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* PhpThumb : PHP Thumb Library <http://phpthumb.gxdlabs.com>
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* Copyright (c) 2009, Ian Selby/Gen X Design
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*
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* Author(s): Ian Selby <ian@gen-x-design.com>
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*
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* Licensed under the MIT License
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* Redistributions of files must retain the above copyright notice.
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*
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* @author Ian Selby <ian@gen-x-design.com>
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* @copyright Copyright (c) 2009 Gen X Design
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* @link http://phpthumb.gxdlabs.com
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* @license http://www.opensource.org/licenses/mit-license.php The MIT License
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* @version 3.0
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* @package PhpThumb
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* @filesource
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*/
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/**
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* GdThumb Class Definition
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*
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* This is the GD Implementation of the PHP Thumb library.
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*
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* @package PhpThumb
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* @subpackage Core
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*/
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class GdThumb extends ThumbBase
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{
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/**
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* The prior image (before manipulation)
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*
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* @var resource
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*/
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protected $oldImage;
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/**
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* The working image (used during manipulation)
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*
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* @var resource
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*/
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protected $workingImage;
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/**
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* The current dimensions of the image
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*
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* @var array
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*/
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protected $currentDimensions;
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/**
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* The new, calculated dimensions of the image
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*
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* @var array
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*/
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protected $newDimensions;
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/**
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* The options for this class
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*
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* This array contains various options that determine the behavior in
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* various functions throughout the class. Functions note which specific
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* option key / values are used in their documentation
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*
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* @var array
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*/
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protected $options;
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/**
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* The maximum width an image can be after resizing (in pixels)
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*
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* @var int
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*/
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protected $maxWidth;
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/**
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* The maximum height an image can be after resizing (in pixels)
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*
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* @var int
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*/
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protected $maxHeight;
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/**
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* The percentage to resize the image by
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*
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* @var int
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*/
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protected $percent;
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/**
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* Class Constructor
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*
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* @return GdThumb
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* @param string $fileName
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*/
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public function __construct ($fileName, $options = array(), $isDataStream = false)
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{
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parent::__construct($fileName, $isDataStream);
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$this->determineFormat();
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if ($this->isDataStream === false)
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{
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$this->verifyFormatCompatiblity();
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}
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switch ($this->format)
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{
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case 'GIF':
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$this->oldImage = imagecreatefromgif($this->fileName);
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break;
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case 'JPG':
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$this->oldImage = imagecreatefromjpeg($this->fileName);
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break;
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case 'PNG':
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$this->oldImage = imagecreatefrompng($this->fileName);
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break;
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case 'STRING':
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$this->oldImage = imagecreatefromstring($this->fileName);
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break;
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}
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$this->currentDimensions = array
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(
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'width' => imagesx($this->oldImage),
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'height' => imagesy($this->oldImage)
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);
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$this->setOptions($options);
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// TODO: Port gatherImageMeta to a separate function that can be called to extract exif data
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}
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/**
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* Class Destructor
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*
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*/
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public function __destruct ()
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{
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if (is_resource($this->oldImage))
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{
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imagedestroy($this->oldImage);
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}
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if (is_resource($this->workingImage))
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{
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imagedestroy($this->workingImage);
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}
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}
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##############################
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# ----- API FUNCTIONS ------ #
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##############################
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/**
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* Resizes an image to be no larger than $maxWidth or $maxHeight
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*
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* If either param is set to zero, then that dimension will not be considered as a part of the resize.
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* Additionally, if $this->options['resizeUp'] is set to true (false by default), then this function will
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* also scale the image up to the maximum dimensions provided.
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*
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* @param int $maxWidth The maximum width of the image in pixels
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* @param int $maxHeight The maximum height of the image in pixels
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* @return GdThumb
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*/
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public function resize ($maxWidth = 0, $maxHeight = 0)
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{
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// make sure our arguments are valid
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if (!is_numeric($maxWidth))
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{
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throw new InvalidArgumentException('$maxWidth must be numeric');
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}
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if (!is_numeric($maxHeight))
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{
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throw new InvalidArgumentException('$maxHeight must be numeric');
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}
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// make sure we're not exceeding our image size if we're not supposed to
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if ($this->options['resizeUp'] === false)
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{
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$this->maxHeight = (intval($maxHeight) > $this->currentDimensions['height']) ? $this->currentDimensions['height'] : $maxHeight;
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$this->maxWidth = (intval($maxWidth) > $this->currentDimensions['width']) ? $this->currentDimensions['width'] : $maxWidth;
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}
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else
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{
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$this->maxHeight = intval($maxHeight);
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$this->maxWidth = intval($maxWidth);
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}
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// get the new dimensions...
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$this->calcImageSize($this->currentDimensions['width'], $this->currentDimensions['height']);
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// create the working image
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if (function_exists('imagecreatetruecolor'))
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{
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$this->workingImage = imagecreatetruecolor($this->newDimensions['newWidth'], $this->newDimensions['newHeight']);
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}
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else
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{
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$this->workingImage = imagecreate($this->newDimensions['newWidth'], $this->newDimensions['newHeight']);
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}
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$this->preserveAlpha();
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// and create the newly sized image
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imagecopyresampled
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(
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$this->workingImage,
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$this->oldImage,
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0,
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0,
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0,
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0,
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$this->newDimensions['newWidth'],
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$this->newDimensions['newHeight'],
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$this->currentDimensions['width'],
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$this->currentDimensions['height']
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);
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// update all the variables and resources to be correct
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$this->oldImage = $this->workingImage;
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$this->currentDimensions['width'] = $this->newDimensions['newWidth'];
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$this->currentDimensions['height'] = $this->newDimensions['newHeight'];
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return $this;
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}
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/**
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* Adaptively Resizes the Image
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*
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* This function attempts to get the image to as close to the provided dimensions as possible, and then crops the
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* remaining overflow (from the center) to get the image to be the size specified
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*
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* @param int $maxWidth
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* @param int $maxHeight
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* @return GdThumb
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*/
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public function adaptiveResize ($width, $height)
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{
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// make sure our arguments are valid
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if (!is_numeric($width) || $width == 0)
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{
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throw new InvalidArgumentException('$width must be numeric and greater than zero');
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}
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if (!is_numeric($height) || $height == 0)
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{
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throw new InvalidArgumentException('$height must be numeric and greater than zero');
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}
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// make sure we're not exceeding our image size if we're not supposed to
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if ($this->options['resizeUp'] === false)
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{
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$this->maxHeight = (intval($height) > $this->currentDimensions['height']) ? $this->currentDimensions['height'] : $height;
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$this->maxWidth = (intval($width) > $this->currentDimensions['width']) ? $this->currentDimensions['width'] : $width;
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}
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else
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{
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$this->maxHeight = intval($height);
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$this->maxWidth = intval($width);
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}
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$this->calcImageSizeStrict($this->currentDimensions['width'], $this->currentDimensions['height']);
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// resize the image to be close to our desired dimensions
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$this->resize($this->newDimensions['newWidth'], $this->newDimensions['newHeight']);
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267
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// reset the max dimensions...
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if ($this->options['resizeUp'] === false)
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{
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$this->maxHeight = (intval($height) > $this->currentDimensions['height']) ? $this->currentDimensions['height'] : $height;
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$this->maxWidth = (intval($width) > $this->currentDimensions['width']) ? $this->currentDimensions['width'] : $width;
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}
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else
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{
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275
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$this->maxHeight = intval($height);
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$this->maxWidth = intval($width);
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277
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}
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278
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279
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// create the working image
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280
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if (function_exists('imagecreatetruecolor'))
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{
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$this->workingImage = imagecreatetruecolor($this->maxWidth, $this->maxHeight);
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}
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else
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285
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{
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286
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$this->workingImage = imagecreate($this->maxWidth, $this->maxHeight);
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287
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}
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288
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289
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$this->preserveAlpha();
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290
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291
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$cropWidth = $this->maxWidth;
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292
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$cropHeight = $this->maxHeight;
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293
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$cropX = 0;
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294
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$cropY = 0;
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295
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296
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// now, figure out how to crop the rest of the image...
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297
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if ($this->currentDimensions['width'] > $this->maxWidth)
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{
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299
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$cropX = intval(($this->currentDimensions['width'] - $this->maxWidth) / 2);
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300
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}
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301
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elseif ($this->currentDimensions['height'] > $this->maxHeight)
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{
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303
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$cropY = intval(($this->currentDimensions['height'] - $this->maxHeight) / 2);
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304
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}
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306
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imagecopyresampled
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(
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$this->workingImage,
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$this->oldImage,
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310
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0,
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0,
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312
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$cropX,
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313
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$cropY,
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314
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$cropWidth,
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315
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$cropHeight,
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316
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$cropWidth,
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317
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$cropHeight
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318
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);
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319
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320
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// update all the variables and resources to be correct
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321
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$this->oldImage = $this->workingImage;
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322
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$this->currentDimensions['width'] = $this->maxWidth;
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323
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$this->currentDimensions['height'] = $this->maxHeight;
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324
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325
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return $this;
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326
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}
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327
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328
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/**
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329
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* Resizes an image by a given percent uniformly
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330
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*
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331
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* Percentage should be whole number representation (i.e. 1-100)
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332
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*
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333
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* @param int $percent
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334
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* @return GdThumb
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335
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*/
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336
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public function resizePercent ($percent = 0)
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337
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{
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338
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if (!is_numeric($percent))
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339
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{
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340
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throw new InvalidArgumentException ('$percent must be numeric');
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341
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}
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342
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343
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$this->percent = intval($percent);
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344
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345
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$this->calcImageSizePercent($this->currentDimensions['width'], $this->currentDimensions['height']);
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346
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347
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if (function_exists('imagecreatetruecolor'))
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348
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{
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349
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$this->workingImage = imagecreatetruecolor($this->newDimensions['newWidth'], $this->newDimensions['newHeight']);
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350
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}
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351
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else
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352
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{
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353
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$this->workingImage = imagecreate($this->newDimensions['newWidth'], $this->newDimensions['newHeight']);
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354
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}
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355
|
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356
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$this->preserveAlpha();
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357
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|
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358
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ImageCopyResampled(
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359
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$this->workingImage,
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360
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$this->oldImage,
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361
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0,
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362
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0,
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|
363
|
0,
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364
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0,
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|
365
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$this->newDimensions['newWidth'],
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366
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$this->newDimensions['newHeight'],
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367
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$this->currentDimensions['width'],
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368
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$this->currentDimensions['height']
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369
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);
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370
|
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371
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$this->oldImage = $this->workingImage;
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372
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$this->currentDimensions['width'] = $this->newDimensions['newWidth'];
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373
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$this->currentDimensions['height'] = $this->newDimensions['newHeight'];
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374
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375
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return $this;
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376
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}
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|
377
|
|
|
378
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/**
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|
379
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* Crops an image from the center with provided dimensions
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|
380
|
*
|
|
381
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* If no height is given, the width will be used as a height, thus creating a square crop
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|
382
|
*
|
|
383
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* @param int $cropWidth
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|
384
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* @param int $cropHeight
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|
385
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* @return GdThumb
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|
386
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*/
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|
387
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public function cropFromCenter ($cropWidth, $cropHeight = null)
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|
388
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{
|
|
389
|
if (!is_numeric($cropWidth))
|
|
390
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{
|
|
391
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throw new InvalidArgumentException('$cropWidth must be numeric');
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|
392
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}
|
|
393
|
|
|
394
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if ($cropHeight !== null && !is_numeric($cropHeight))
|
|
395
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{
|
|
396
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throw new InvalidArgumentException('$cropHeight must be numeric');
|
|
397
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}
|
|
398
|
|
|
399
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if ($cropHeight === null)
|
|
400
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{
|
|
401
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$cropHeight = $cropWidth;
|
|
402
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}
|
|
403
|
|
|
404
|
$cropWidth = ($this->currentDimensions['width'] < $cropWidth) ? $this->currentDimensions['width'] : $cropWidth;
|
|
405
|
$cropHeight = ($this->currentDimensions['height'] < $cropHeight) ? $this->currentDimensions['height'] : $cropHeight;
|
|
406
|
|
|
407
|
$cropX = intval(($this->currentDimensions['width'] - $cropWidth) / 2);
|
|
408
|
$cropY = intval(($this->currentDimensions['height'] - $cropHeight) / 2);
|
|
409
|
|
|
410
|
$this->crop($cropX, $cropY, $cropWidth, $cropHeight);
|
|
411
|
|
|
412
|
return $this;
|
|
413
|
}
|
|
414
|
|
|
415
|
/**
|
|
416
|
* Vanilla Cropping - Crops from x,y with specified width and height
|
|
417
|
*
|
|
418
|
* @param int $startX
|
|
419
|
* @param int $startY
|
|
420
|
* @param int $cropWidth
|
|
421
|
* @param int $cropHeight
|
|
422
|
* @return GdThumb
|
|
423
|
*/
|
|
424
|
public function crop ($startX, $startY, $cropWidth, $cropHeight)
|
|
425
|
{
|
|
426
|
// validate input
|
|
427
|
if (!is_numeric($startX))
|
|
428
|
{
|
|
429
|
throw new InvalidArgumentException('$startX must be numeric');
|
|
430
|
}
|
|
431
|
|
|
432
|
if (!is_numeric($startY))
|
|
433
|
{
|
|
434
|
throw new InvalidArgumentException('$startY must be numeric');
|
|
435
|
}
|
|
436
|
|
|
437
|
if (!is_numeric($cropWidth))
|
|
438
|
{
|
|
439
|
throw new InvalidArgumentException('$cropWidth must be numeric');
|
|
440
|
}
|
|
441
|
|
|
442
|
if (!is_numeric($cropHeight))
|
|
443
|
{
|
|
444
|
throw new InvalidArgumentException('$cropHeight must be numeric');
|
|
445
|
}
|
|
446
|
|
|
447
|
// do some calculations
|
|
448
|
$cropWidth = ($this->currentDimensions['width'] < $cropWidth) ? $this->currentDimensions['width'] : $cropWidth;
|
|
449
|
$cropHeight = ($this->currentDimensions['height'] < $cropHeight) ? $this->currentDimensions['height'] : $cropHeight;
|
|
450
|
|
|
451
|
// ensure everything's in bounds
|
|
452
|
if (($startX + $cropWidth) > $this->currentDimensions['width'])
|
|
453
|
{
|
|
454
|
$startX = ($this->currentDimensions['width'] - $cropWidth);
|
|
455
|
|
|
456
|
}
|
|
457
|
|
|
458
|
if (($startY + $cropHeight) > $this->currentDimensions['height'])
|
|
459
|
{
|
|
460
|
$startY = ($this->currentDimensions['height'] - $cropHeight);
|
|
461
|
}
|
|
462
|
|
|
463
|
if ($startX < 0)
|
|
464
|
{
|
|
465
|
$startX = 0;
|
|
466
|
}
|
|
467
|
|
|
468
|
if ($startY < 0)
|
|
469
|
{
|
|
470
|
$startY = 0;
|
|
471
|
}
|
|
472
|
|
|
473
|
// create the working image
|
|
474
|
if (function_exists('imagecreatetruecolor'))
|
|
475
|
{
|
|
476
|
$this->workingImage = imagecreatetruecolor($cropWidth, $cropHeight);
|
|
477
|
}
|
|
478
|
else
|
|
479
|
{
|
|
480
|
$this->workingImage = imagecreate($cropWidth, $cropHeight);
|
|
481
|
}
|
|
482
|
|
|
483
|
$this->preserveAlpha();
|
|
484
|
|
|
485
|
imagecopyresampled
|
|
486
|
(
|
|
487
|
$this->workingImage,
|
|
488
|
$this->oldImage,
|
|
489
|
0,
|
|
490
|
0,
|
|
491
|
$startX,
|
|
492
|
$startY,
|
|
493
|
$cropWidth,
|
|
494
|
$cropHeight,
|
|
495
|
$cropWidth,
|
|
496
|
$cropHeight
|
|
497
|
);
|
|
498
|
|
|
499
|
$this->oldImage = $this->workingImage;
|
|
500
|
$this->currentDimensions['width'] = $cropWidth;
|
|
501
|
$this->currentDimensions['height'] = $cropHeight;
|
|
502
|
|
|
503
|
return $this;
|
|
504
|
}
|
|
505
|
|
|
506
|
/**
|
|
507
|
* Rotates image either 90 degrees clockwise or counter-clockwise
|
|
508
|
*
|
|
509
|
* @param string $direction
|
|
510
|
* @retunrn GdThumb
|
|
511
|
*/
|
|
512
|
public function rotateImage ($direction = 'CW')
|
|
513
|
{
|
|
514
|
if ($direction == 'CW')
|
|
515
|
{
|
|
516
|
$this->rotateImageNDegrees(90);
|
|
517
|
}
|
|
518
|
else
|
|
519
|
{
|
|
520
|
$this->rotateImageNDegrees(-90);
|
|
521
|
}
|
|
522
|
|
|
523
|
return $this;
|
|
524
|
}
|
|
525
|
|
|
526
|
/**
|
|
527
|
* Rotates image specified number of degrees
|
|
528
|
*
|
|
529
|
* @param int $degrees
|
|
530
|
* @return GdThumb
|
|
531
|
*/
|
|
532
|
public function rotateImageNDegrees ($degrees)
|
|
533
|
{
|
|
534
|
if (!is_numeric($degrees))
|
|
535
|
{
|
|
536
|
throw new InvalidArgumentException('$degrees must be numeric');
|
|
537
|
}
|
|
538
|
|
|
539
|
if (!function_exists('imagerotate'))
|
|
540
|
{
|
|
541
|
throw new RuntimeException('Your version of GD does not support image rotation.');
|
|
542
|
}
|
|
543
|
|
|
544
|
$this->workingImage = imagerotate($this->oldImage, $degrees, 0);
|
|
545
|
|
|
546
|
$newWidth = $this->currentDimensions['height'];
|
|
547
|
$newHeight = $this->currentDimensions['width'];
|
|
548
|
$this->oldImage = $this->workingImage;
|
|
549
|
$this->currentDimensions['width'] = $newWidth;
|
|
550
|
$this->currentDimensions['height'] = $newHeight;
|
|
551
|
|
|
552
|
return $this;
|
|
553
|
}
|
|
554
|
|
|
555
|
/**
|
|
556
|
* Shows an image
|
|
557
|
*
|
|
558
|
* This function will show the current image by first sending the appropriate header
|
|
559
|
* for the format, and then outputting the image data. If headers have already been sent,
|
|
560
|
* a runtime exception will be thrown
|
|
561
|
*
|
|
562
|
* @param bool $rawData Whether or not the raw image stream should be output
|
|
563
|
* @return GdThumb
|
|
564
|
*/
|
|
565
|
public function show ($rawData = false)
|
|
566
|
{
|
|
567
|
if (headers_sent())
|
|
568
|
{
|
|
569
|
throw new RuntimeException('Cannot show image, headers have already been sent');
|
|
570
|
}
|
|
571
|
|
|
572
|
switch ($this->format)
|
|
573
|
{
|
|
574
|
case 'GIF':
|
|
575
|
if ($rawData === false)
|
|
576
|
{
|
|
577
|
header('Content-type: image/gif');
|
|
578
|
}
|
|
579
|
imagegif($this->oldImage);
|
|
580
|
break;
|
|
581
|
case 'JPG':
|
|
582
|
if ($rawData === false)
|
|
583
|
{
|
|
584
|
header('Content-type: image/jpeg');
|
|
585
|
}
|
|
586
|
imagejpeg($this->oldImage, null, $this->options['jpegQuality']);
|
|
587
|
break;
|
|
588
|
case 'PNG':
|
|
589
|
case 'STRING':
|
|
590
|
if ($rawData === false)
|
|
591
|
{
|
|
592
|
header('Content-type: image/png');
|
|
593
|
}
|
|
594
|
imagepng($this->oldImage);
|
|
595
|
break;
|
|
596
|
}
|
|
597
|
|
|
598
|
return $this;
|
|
599
|
}
|
|
600
|
|
|
601
|
/**
|
|
602
|
* Returns the Working Image as a String
|
|
603
|
*
|
|
604
|
* This function is useful for getting the raw image data as a string for storage in
|
|
605
|
* a database, or other similar things.
|
|
606
|
*
|
|
607
|
* @return string
|
|
608
|
*/
|
|
609
|
public function getImageAsString ()
|
|
610
|
{
|
|
611
|
$data = null;
|
|
612
|
ob_start();
|
|
613
|
$this->show(true);
|
|
614
|
$data = ob_get_contents();
|
|
615
|
ob_end_clean();
|
|
616
|
|
|
617
|
return $data;
|
|
618
|
}
|
|
619
|
|
|
620
|
/**
|
|
621
|
* Saves an image
|
|
622
|
*
|
|
623
|
* This function will make sure the target directory is writeable, and then save the image.
|
|
624
|
*
|
|
625
|
* If the target directory is not writeable, the function will try to correct the permissions (if allowed, this
|
|
626
|
* is set as an option ($this->options['correctPermissions']). If the target cannot be made writeable, then a
|
|
627
|
* RuntimeException is thrown.
|
|
628
|
*
|
|
629
|
* TODO: Create additional paramter for color matte when saving images with alpha to non-alpha formats (i.e. PNG => JPG)
|
|
630
|
*
|
|
631
|
* @param string $fileName The full path and filename of the image to save
|
|
632
|
* @param string $format The format to save the image in (optional, must be one of [GIF,JPG,PNG]
|
|
633
|
* @return GdThumb
|
|
634
|
*/
|
|
635
|
public function save ($fileName, $format = null)
|
|
636
|
{
|
|
637
|
$validFormats = array('GIF', 'JPG', 'PNG');
|
|
638
|
$format = ($format !== null) ? strtoupper($format) : $this->format;
|
|
639
|
|
|
640
|
if (!in_array($format, $validFormats))
|
|
641
|
{
|
|
642
|
throw new InvalidArgumentException ('Invalid format type specified in save function: ' . $format);
|
|
643
|
}
|
|
644
|
|
|
645
|
// make sure the directory is writeable
|
|
646
|
if (!is_writeable(dirname($fileName)))
|
|
647
|
{
|
|
648
|
// try to correct the permissions
|
|
649
|
if ($this->options['correctPermissions'] === true)
|
|
650
|
{
|
|
651
|
@chmod(dirname($fileName), 0777);
|
|
652
|
|
|
653
|
// throw an exception if not writeable
|
|
654
|
if (!is_writeable(dirname($fileName)))
|
|
655
|
{
|
|
656
|
throw new RuntimeException ('File is not writeable, and could not correct permissions: ' . $fileName);
|
|
657
|
}
|
|
658
|
}
|
|
659
|
// throw an exception if not writeable
|
|
660
|
else
|
|
661
|
{
|
|
662
|
throw new RuntimeException ('File not writeable: ' . $fileName);
|
|
663
|
}
|
|
664
|
}
|
|
665
|
|
|
666
|
switch ($format)
|
|
667
|
{
|
|
668
|
case 'GIF':
|
|
669
|
imagegif($this->oldImage, $fileName);
|
|
670
|
break;
|
|
671
|
case 'JPG':
|
|
672
|
imagejpeg($this->oldImage, $fileName, $this->options['jpegQuality']);
|
|
673
|
break;
|
|
674
|
case 'PNG':
|
|
675
|
imagepng($this->oldImage, $fileName);
|
|
676
|
break;
|
|
677
|
}
|
|
678
|
|
|
679
|
return $this;
|
|
680
|
}
|
|
681
|
|
|
682
|
#################################
|
|
683
|
# ----- GETTERS / SETTERS ----- #
|
|
684
|
#################################
|
|
685
|
|
|
686
|
/**
|
|
687
|
* Sets $this->options to $options
|
|
688
|
*
|
|
689
|
* @param array $options
|
|
690
|
*/
|
|
691
|
public function setOptions ($options = array())
|
|
692
|
{
|
|
693
|
// make sure we've got an array for $this->options (could be null)
|
|
694
|
if (!is_array($this->options))
|
|
695
|
{
|
|
696
|
$this->options = array();
|
|
697
|
}
|
|
698
|
|
|
699
|
// make sure we've gotten a proper argument
|
|
700
|
if (!is_array($options))
|
|
701
|
{
|
|
702
|
throw new InvalidArgumentException ('setOptions requires an array');
|
|
703
|
}
|
|
704
|
|
|
705
|
// we've yet to init the default options, so create them here
|
|
706
|
if (sizeof($this->options) == 0)
|
|
707
|
{
|
|
708
|
$defaultOptions = array
|
|
709
|
(
|
|
710
|
'resizeUp' => false,
|
|
711
|
'jpegQuality' => 100,
|
|
712
|
'correctPermissions' => true,
|
|
713
|
'preserveAlpha' => true,
|
|
714
|
'alphaMaskColor' => array (255, 255, 255),
|
|
715
|
'preserveTransparency' => true,
|
|
716
|
'transparencyMaskColor' => array (0, 0, 0)
|
|
717
|
);
|
|
718
|
}
|
|
719
|
// otherwise, let's use what we've got already
|
|
720
|
else
|
|
721
|
{
|
|
722
|
$defaultOptions = $this->options;
|
|
723
|
}
|
|
724
|
|
|
725
|
$this->options = array_merge($defaultOptions, $options);
|
|
726
|
}
|
|
727
|
|
|
728
|
/**
|
|
729
|
* Returns $currentDimensions.
|
|
730
|
*
|
|
731
|
* @see GdThumb::$currentDimensions
|
|
732
|
*/
|
|
733
|
public function getCurrentDimensions ()
|
|
734
|
{
|
|
735
|
return $this->currentDimensions;
|
|
736
|
}
|
|
737
|
|
|
738
|
/**
|
|
739
|
* Sets $currentDimensions.
|
|
740
|
*
|
|
741
|
* @param object $currentDimensions
|
|
742
|
* @see GdThumb::$currentDimensions
|
|
743
|
*/
|
|
744
|
public function setCurrentDimensions ($currentDimensions)
|
|
745
|
{
|
|
746
|
$this->currentDimensions = $currentDimensions;
|
|
747
|
}
|
|
748
|
|
|
749
|
/**
|
|
750
|
* Returns $maxHeight.
|
|
751
|
*
|
|
752
|
* @see GdThumb::$maxHeight
|
|
753
|
*/
|
|
754
|
public function getMaxHeight ()
|
|
755
|
{
|
|
756
|
return $this->maxHeight;
|
|
757
|
}
|
|
758
|
|
|
759
|
/**
|
|
760
|
* Sets $maxHeight.
|
|
761
|
*
|
|
762
|
* @param object $maxHeight
|
|
763
|
* @see GdThumb::$maxHeight
|
|
764
|
*/
|
|
765
|
public function setMaxHeight ($maxHeight)
|
|
766
|
{
|
|
767
|
$this->maxHeight = $maxHeight;
|
|
768
|
}
|
|
769
|
|
|
770
|
/**
|
|
771
|
* Returns $maxWidth.
|
|
772
|
*
|
|
773
|
* @see GdThumb::$maxWidth
|
|
774
|
*/
|
|
775
|
public function getMaxWidth ()
|
|
776
|
{
|
|
777
|
return $this->maxWidth;
|
|
778
|
}
|
|
779
|
|
|
780
|
/**
|
|
781
|
* Sets $maxWidth.
|
|
782
|
*
|
|
783
|
* @param object $maxWidth
|
|
784
|
* @see GdThumb::$maxWidth
|
|
785
|
*/
|
|
786
|
public function setMaxWidth ($maxWidth)
|
|
787
|
{
|
|
788
|
$this->maxWidth = $maxWidth;
|
|
789
|
}
|
|
790
|
|
|
791
|
/**
|
|
792
|
* Returns $newDimensions.
|
|
793
|
*
|
|
794
|
* @see GdThumb::$newDimensions
|
|
795
|
*/
|
|
796
|
public function getNewDimensions ()
|
|
797
|
{
|
|
798
|
return $this->newDimensions;
|
|
799
|
}
|
|
800
|
|
|
801
|
/**
|
|
802
|
* Sets $newDimensions.
|
|
803
|
*
|
|
804
|
* @param object $newDimensions
|
|
805
|
* @see GdThumb::$newDimensions
|
|
806
|
*/
|
|
807
|
public function setNewDimensions ($newDimensions)
|
|
808
|
{
|
|
809
|
$this->newDimensions = $newDimensions;
|
|
810
|
}
|
|
811
|
|
|
812
|
/**
|
|
813
|
* Returns $options.
|
|
814
|
*
|
|
815
|
* @see GdThumb::$options
|
|
816
|
*/
|
|
817
|
public function getOptions ()
|
|
818
|
{
|
|
819
|
return $this->options;
|
|
820
|
}
|
|
821
|
|
|
822
|
/**
|
|
823
|
* Returns $percent.
|
|
824
|
*
|
|
825
|
* @see GdThumb::$percent
|
|
826
|
*/
|
|
827
|
public function getPercent ()
|
|
828
|
{
|
|
829
|
return $this->percent;
|
|
830
|
}
|
|
831
|
|
|
832
|
/**
|
|
833
|
* Sets $percent.
|
|
834
|
*
|
|
835
|
* @param object $percent
|
|
836
|
* @see GdThumb::$percent
|
|
837
|
*/
|
|
838
|
public function setPercent ($percent)
|
|
839
|
{
|
|
840
|
$this->percent = $percent;
|
|
841
|
}
|
|
842
|
|
|
843
|
/**
|
|
844
|
* Returns $oldImage.
|
|
845
|
*
|
|
846
|
* @see GdThumb::$oldImage
|
|
847
|
*/
|
|
848
|
public function getOldImage ()
|
|
849
|
{
|
|
850
|
return $this->oldImage;
|
|
851
|
}
|
|
852
|
|
|
853
|
/**
|
|
854
|
* Sets $oldImage.
|
|
855
|
*
|
|
856
|
* @param object $oldImage
|
|
857
|
* @see GdThumb::$oldImage
|
|
858
|
*/
|
|
859
|
public function setOldImage ($oldImage)
|
|
860
|
{
|
|
861
|
$this->oldImage = $oldImage;
|
|
862
|
}
|
|
863
|
|
|
864
|
/**
|
|
865
|
* Returns $workingImage.
|
|
866
|
*
|
|
867
|
* @see GdThumb::$workingImage
|
|
868
|
*/
|
|
869
|
public function getWorkingImage ()
|
|
870
|
{
|
|
871
|
return $this->workingImage;
|
|
872
|
}
|
|
873
|
|
|
874
|
/**
|
|
875
|
* Sets $workingImage.
|
|
876
|
*
|
|
877
|
* @param object $workingImage
|
|
878
|
* @see GdThumb::$workingImage
|
|
879
|
*/
|
|
880
|
public function setWorkingImage ($workingImage)
|
|
881
|
{
|
|
882
|
$this->workingImage = $workingImage;
|
|
883
|
}
|
|
884
|
|
|
885
|
|
|
886
|
#################################
|
|
887
|
# ----- UTILITY FUNCTIONS ----- #
|
|
888
|
#################################
|
|
889
|
|
|
890
|
/**
|
|
891
|
* Calculates a new width and height for the image based on $this->maxWidth and the provided dimensions
|
|
892
|
*
|
|
893
|
* @return array
|
|
894
|
* @param int $width
|
|
895
|
* @param int $height
|
|
896
|
*/
|
|
897
|
protected function calcWidth ($width, $height)
|
|
898
|
{
|
|
899
|
$newWidthPercentage = (100 * $this->maxWidth) / $width;
|
|
900
|
$newHeight = ($height * $newWidthPercentage) / 100;
|
|
901
|
|
|
902
|
return array
|
|
903
|
(
|
|
904
|
'newWidth' => intval($this->maxWidth),
|
|
905
|
'newHeight' => intval($newHeight)
|
|
906
|
);
|
|
907
|
}
|
|
908
|
|
|
909
|
/**
|
|
910
|
* Calculates a new width and height for the image based on $this->maxWidth and the provided dimensions
|
|
911
|
*
|
|
912
|
* @return array
|
|
913
|
* @param int $width
|
|
914
|
* @param int $height
|
|
915
|
*/
|
|
916
|
protected function calcHeight ($width, $height)
|
|
917
|
{
|
|
918
|
$newHeightPercentage = (100 * $this->maxHeight) / $height;
|
|
919
|
$newWidth = ($width * $newHeightPercentage) / 100;
|
|
920
|
|
|
921
|
return array
|
|
922
|
(
|
|
923
|
'newWidth' => ceil($newWidth),
|
|
924
|
'newHeight' => ceil($this->maxHeight)
|
|
925
|
);
|
|
926
|
}
|
|
927
|
|
|
928
|
/**
|
|
929
|
* Calculates a new width and height for the image based on $this->percent and the provided dimensions
|
|
930
|
*
|
|
931
|
* @return array
|
|
932
|
* @param int $width
|
|
933
|
* @param int $height
|
|
934
|
*/
|
|
935
|
protected function calcPercent ($width, $height)
|
|
936
|
{
|
|
937
|
$newWidth = ($width * $this->percent) / 100;
|
|
938
|
$newHeight = ($height * $this->percent) / 100;
|
|
939
|
|
|
940
|
return array
|
|
941
|
(
|
|
942
|
'newWidth' => ceil($newWidth),
|
|
943
|
'newHeight' => ceil($newHeight)
|
|
944
|
);
|
|
945
|
}
|
|
946
|
|
|
947
|
/**
|
|
948
|
* Calculates the new image dimensions
|
|
949
|
*
|
|
950
|
* These calculations are based on both the provided dimensions and $this->maxWidth and $this->maxHeight
|
|
951
|
*
|
|
952
|
* @param int $width
|
|
953
|
* @param int $height
|
|
954
|
*/
|
|
955
|
protected function calcImageSize ($width, $height)
|
|
956
|
{
|
|
957
|
$newSize = array
|
|
958
|
(
|
|
959
|
'newWidth' => $width,
|
|
960
|
'newHeight' => $height
|
|
961
|
);
|
|
962
|
|
|
963
|
if ($this->maxWidth > 0)
|
|
964
|
{
|
|
965
|
$newSize = $this->calcWidth($width, $height);
|
|
966
|
|
|
967
|
if ($this->maxHeight > 0 && $newSize['newHeight'] > $this->maxHeight)
|
|
968
|
{
|
|
969
|
$newSize = $this->calcHeight($newSize['newWidth'], $newSize['newHeight']);
|
|
970
|
}
|
|
971
|
}
|
|
972
|
|
|
973
|
if ($this->maxHeight > 0)
|
|
974
|
{
|
|
975
|
$newSize = $this->calcHeight($width, $height);
|
|
976
|
|
|
977
|
if ($this->maxWidth > 0 && $newSize['newWidth'] > $this->maxWidth)
|
|
978
|
{
|
|
979
|
$newSize = $this->calcWidth($newSize['newWidth'], $newSize['newHeight']);
|
|
980
|
}
|
|
981
|
}
|
|
982
|
|
|
983
|
$this->newDimensions = $newSize;
|
|
984
|
}
|
|
985
|
|
|
986
|
/**
|
|
987
|
* Calculates new image dimensions, not allowing the width and height to be less than either the max width or height
|
|
988
|
*
|
|
989
|
* @param int $width
|
|
990
|
* @param int $height
|
|
991
|
*/
|
|
992
|
protected function calcImageSizeStrict ($width, $height)
|
|
993
|
{
|
|
994
|
// first, we need to determine what the longest resize dimension is..
|
|
995
|
if ($this->maxWidth >= $this->maxHeight)
|
|
996
|
{
|
|
997
|
// and determine the longest original dimension
|
|
998
|
if ($width > $height)
|
|
999
|
{
|
|
1000
|
$newDimensions = $this->calcHeight($width, $height);
|
|
1001
|
|
|
1002
|
if ($newDimensions['newWidth'] < $this->maxWidth)
|
|
1003
|
{
|
|
1004
|
$newDimensions = $this->calcWidth($width, $height);
|
|
1005
|
}
|
|
1006
|
}
|
|
1007
|
elseif ($height >= $width)
|
|
1008
|
{
|
|
1009
|
$newDimensions = $this->calcWidth($width, $height);
|
|
1010
|
|
|
1011
|
if ($newDimensions['newHeight'] < $this->maxHeight)
|
|
1012
|
{
|
|
1013
|
$newDimensions = $this->calcHeight($width, $height);
|
|
1014
|
}
|
|
1015
|
}
|
|
1016
|
}
|
|
1017
|
elseif ($this->maxHeight > $this->maxWidth)
|
|
1018
|
{
|
|
1019
|
if ($width >= $height)
|
|
1020
|
{
|
|
1021
|
$newDimensions = $this->calcWidth($width, $height);
|
|
1022
|
|
|
1023
|
if ($newDimensions['newHeight'] < $this->maxHeight)
|
|
1024
|
{
|
|
1025
|
$newDimensions = $this->calcHeight($width, $height);
|
|
1026
|
}
|
|
1027
|
}
|
|
1028
|
elseif ($height > $width)
|
|
1029
|
{
|
|
1030
|
$newDimensions = $this->calcHeight($width, $height);
|
|
1031
|
|
|
1032
|
if ($newDimensions['newWidth'] < $this->maxWidth)
|
|
1033
|
{
|
|
1034
|
$newDimensions = $this->calcWidth($width, $height);
|
|
1035
|
}
|
|
1036
|
}
|
|
1037
|
}
|
|
1038
|
|
|
1039
|
$this->newDimensions = $newDimensions;
|
|
1040
|
}
|
|
1041
|
|
|
1042
|
/**
|
|
1043
|
* Calculates new dimensions based on $this->percent and the provided dimensions
|
|
1044
|
*
|
|
1045
|
* @param int $width
|
|
1046
|
* @param int $height
|
|
1047
|
*/
|
|
1048
|
protected function calcImageSizePercent ($width, $height)
|
|
1049
|
{
|
|
1050
|
if ($this->percent > 0)
|
|
1051
|
{
|
|
1052
|
$this->newDimensions = $this->calcPercent($width, $height);
|
|
1053
|
}
|
|
1054
|
}
|
|
1055
|
|
|
1056
|
/**
|
|
1057
|
* Determines the file format by mime-type
|
|
1058
|
*
|
|
1059
|
* This function will throw exceptions for invalid images / mime-types
|
|
1060
|
*
|
|
1061
|
*/
|
|
1062
|
protected function determineFormat ()
|
|
1063
|
{
|
|
1064
|
if ($this->isDataStream === true)
|
|
1065
|
{
|
|
1066
|
$this->format = 'STRING';
|
|
1067
|
return;
|
|
1068
|
}
|
|
1069
|
|
|
1070
|
$formatInfo = getimagesize($this->fileName);
|
|
1071
|
|
|
1072
|
// non-image files will return false
|
|
1073
|
if ($formatInfo === false)
|
|
1074
|
{
|
|
1075
|
if ($this->remoteImage)
|
|
1076
|
{
|
|
1077
|
$this->triggerError('Could not determine format of remote image: ' . $this->fileName);
|
|
1078
|
}
|
|
1079
|
else
|
|
1080
|
{
|
|
1081
|
$this->triggerError('File is not a valid image: ' . $this->fileName);
|
|
1082
|
}
|
|
1083
|
|
|
1084
|
// make sure we really stop execution
|
|
1085
|
return;
|
|
1086
|
}
|
|
1087
|
|
|
1088
|
$mimeType = isset($formatInfo['mime']) ? $formatInfo['mime'] : null;
|
|
1089
|
|
|
1090
|
switch ($mimeType)
|
|
1091
|
{
|
|
1092
|
case 'image/gif':
|
|
1093
|
$this->format = 'GIF';
|
|
1094
|
break;
|
|
1095
|
case 'image/jpeg':
|
|
1096
|
$this->format = 'JPG';
|
|
1097
|
break;
|
|
1098
|
case 'image/png':
|
|
1099
|
$this->format = 'PNG';
|
|
1100
|
break;
|
|
1101
|
default:
|
|
1102
|
$this->triggerError('Image format not supported: ' . $mimeType);
|
|
1103
|
}
|
|
1104
|
}
|
|
1105
|
|
|
1106
|
/**
|
|
1107
|
* Makes sure the correct GD implementation exists for the file type
|
|
1108
|
*
|
|
1109
|
*/
|
|
1110
|
protected function verifyFormatCompatiblity ()
|
|
1111
|
{
|
|
1112
|
$isCompatible = true;
|
|
1113
|
$gdInfo = gd_info();
|
|
1114
|
|
|
1115
|
switch ($this->format)
|
|
1116
|
{
|
|
1117
|
case 'GIF':
|
|
1118
|
$isCompatible = $gdInfo['GIF Create Support'];
|
|
1119
|
break;
|
|
1120
|
case 'JPG':
|
|
1121
|
$isCompatible = (isset($gdInfo['JPG Support']) || isset($gdInfo['JPEG Support'])) ? true : false;
|
|
1122
|
break;
|
|
1123
|
case 'PNG':
|
|
1124
|
$isCompatible = $gdInfo[$this->format . ' Support'];
|
|
1125
|
break;
|
|
1126
|
default:
|
|
1127
|
$isCompatible = false;
|
|
1128
|
}
|
|
1129
|
|
|
1130
|
if (!$isCompatible)
|
|
1131
|
{
|
|
1132
|
// one last check for "JPEG" instead
|
|
1133
|
$isCompatible = $gdInfo['JPEG Support'];
|
|
1134
|
|
|
1135
|
if (!$isCompatible)
|
|
1136
|
{
|
|
1137
|
$this->triggerError('Your GD installation does not support ' . $this->format . ' image types');
|
|
1138
|
}
|
|
1139
|
}
|
|
1140
|
}
|
|
1141
|
|
|
1142
|
/**
|
|
1143
|
* Preserves the alpha or transparency for PNG and GIF files
|
|
1144
|
*
|
|
1145
|
* Alpha / transparency will not be preserved if the appropriate options are set to false.
|
|
1146
|
* Also, the GIF transparency is pretty skunky (the results aren't awesome), but it works like a
|
|
1147
|
* champ... that's the nature of GIFs tho, so no huge surprise.
|
|
1148
|
*
|
|
1149
|
* This functionality was originally suggested by commenter Aimi (no links / site provided) - Thanks! :)
|
|
1150
|
*
|
|
1151
|
*/
|
|
1152
|
protected function preserveAlpha ()
|
|
1153
|
{
|
|
1154
|
if ($this->format == 'PNG' && $this->options['preserveAlpha'] === true)
|
|
1155
|
{
|
|
1156
|
imagealphablending($this->workingImage, false);
|
|
1157
|
|
|
1158
|
$colorTransparent = imagecolorallocatealpha
|
|
1159
|
(
|
|
1160
|
$this->workingImage,
|
|
1161
|
$this->options['alphaMaskColor'][0],
|
|
1162
|
$this->options['alphaMaskColor'][1],
|
|
1163
|
$this->options['alphaMaskColor'][2],
|
|
1164
|
0
|
|
1165
|
);
|
|
1166
|
|
|
1167
|
imagefill($this->workingImage, 0, 0, $colorTransparent);
|
|
1168
|
imagesavealpha($this->workingImage, true);
|
|
1169
|
}
|
|
1170
|
// preserve transparency in GIFs... this is usually pretty rough tho
|
|
1171
|
if ($this->format == 'GIF' && $this->options['preserveTransparency'] === true)
|
|
1172
|
{
|
|
1173
|
$colorTransparent = imagecolorallocate
|
|
1174
|
(
|
|
1175
|
$this->workingImage,
|
|
1176
|
$this->options['transparencyMaskColor'][0],
|
|
1177
|
$this->options['transparencyMaskColor'][1],
|
|
1178
|
$this->options['transparencyMaskColor'][2]
|
|
1179
|
);
|
|
1180
|
|
|
1181
|
imagecolortransparent($this->workingImage, $colorTransparent);
|
|
1182
|
imagetruecolortopalette($this->workingImage, true, 256);
|
|
1183
|
}
|
|
1184
|
}
|
|
1185
|
}
|