2018-08-19 17:13:16 +00:00
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<?php
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namespace LAM\ImageUtils;
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use Imagick;
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/*
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This code is part of LDAP Account Manager (http://www.ldap-account-manager.org/)
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Copyright (C) 2018 Roland Gruber
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/**
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* Image manipulation functions.
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*
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* @author Roland Gruber
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*/
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/**
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* Factory to create modificators for images.
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*
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* @author Roland Gruber
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*/
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class ImageManipulationFactory {
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/**
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* Returns an image manipulator based on installed PHP modules.
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*
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* @param string $imageData binary string of image data
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* @return ImageManipulator manipulator
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*/
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public static function getImageManipulator($imageData) {
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if (extension_loaded('imagick')) {
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return new ImageManipulatorImagick($imageData);
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}
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2018-08-25 17:39:47 +00:00
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return new ImageManipulatorGd($imageData);
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}
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/**
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* Returns an image manipulator based on installed PHP modules.
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*
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* @param string $path path to image file
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* @return ImageManipulator manipulator
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*/
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public static function getImageManipulatorFromFile($path) {
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$handle = fopen($path, "r");
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$data = fread($handle, 100000000);
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fclose($handle);
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return ImageManipulationFactory::getImageManipulator($data);
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2018-08-19 17:13:16 +00:00
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}
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}
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/**
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* Modifies images.
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*
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* @author Roland Gruber
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*/
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interface ImageManipulator {
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/**
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* Returns the height of the image.
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*
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* @return int height
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*/
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public function getHeight();
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/**
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* Returns the width of the image.
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*
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* @return int width
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*/
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public function getWidth();
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/**
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* Resizes the image to the given maximum dimensions.
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*
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* @param int $width width
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* @param int $height height
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*/
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public function thumbnail($width, $height);
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/**
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* Converts the image to JPEG format.
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*/
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public function convertToJpeg();
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/**
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* Crops the image.
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*
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* @param int $x starting point in original image
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* @param int $y starting point in original image
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* @param int $width width of target size
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* @param int $height height of target size
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*/
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public function crop($x, $y, $width, $height);
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/**
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* Returns the image as binary string.
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*
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* @return string image data
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*/
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public function getImageData();
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}
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/**
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* Manipulates images using Imagick library.
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*
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* @author Roland Gruber
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*/
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class ImageManipulatorImagick implements ImageManipulator {
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/**
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* Image
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*
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* @var Imagick image
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*/
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private $image;
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/**
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* Constructor.
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*
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* @param string $imageData original image as binary string
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*/
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public function __construct($imageData) {
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$this->image = new Imagick();
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$this->image->readimageblob($imageData);
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}
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/**
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* {@inheritDoc}
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* @see \LAM\ImageUtils\ImageManipulator::getHeight()
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*/
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public function getHeight() {
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2018-08-25 17:39:47 +00:00
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return $this->image->getimageheight();
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2018-08-19 17:13:16 +00:00
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}
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/**
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* {@inheritDoc}
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* @see \LAM\ImageUtils\ImageManipulator::getWidth()
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*/
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public function getWidth() {
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2018-08-25 17:39:47 +00:00
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return $this->image->getimagewidth();
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2018-08-19 17:13:16 +00:00
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}
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/**
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* {@inheritDoc}
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* @see \LAM\ImageUtils\ImageManipulator::getAsJpeg()
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*/
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public function convertToJpeg() {
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$this->image->setImageCompression(Imagick::COMPRESSION_JPEG);
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$this->image->setImageFormat('jpeg');
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}
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/**
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* {@inheritDoc}
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* @see \LAM\ImageUtils\ImageManipulator::crop()
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*/
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public function crop($x, $y, $width, $height) {
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$this->image->cropimage($width, $height, $x, $y);
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}
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2018-08-25 17:39:47 +00:00
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2018-08-19 17:13:16 +00:00
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/**
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* {@inheritDoc}
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* @see \LAM\ImageUtils\ImageManipulator::resize()
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*/
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public function thumbnail($width, $height) {
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2018-08-25 17:39:47 +00:00
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if (($this->getWidth() <= $width) && ($this->getHeight() <= $height)) {
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// skip if smaller than target size
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return;
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}
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2018-08-19 17:13:16 +00:00
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$this->image->thumbnailimage($width, $height, true);
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}
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/**
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* {@inheritDoc}
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* @see \LAM\ImageUtils\ImageManipulator::getImageData()
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*/
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public function getImageData() {
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return $this->image->getimageblob();
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}
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}
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2018-08-25 17:39:47 +00:00
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/**
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* Manipulates images using gd library.
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*
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* @author Roland Gruber
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*/
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class ImageManipulatorGd implements ImageManipulator {
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/**
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* Image
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*
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* @var resource image
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*/
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private $image;
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/**
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* GD image type
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*
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* @var int image type
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*/
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private $type;
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/**
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* Constructor.
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*
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* @param string $imageData original image as binary string
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*/
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public function __construct($imageData) {
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$this->image = imagecreatefromstring($imageData);
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$info = getimagesizefromstring($imageData);
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$this->type = $info[2];
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}
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/**
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* Destructor
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*/
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public function __destruct() {
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if ($this->image != null) {
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imagedestroy($this->image);
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}
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}
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/**
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* {@inheritDoc}
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* @see \LAM\ImageUtils\ImageManipulator::getHeight()
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*/
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public function getHeight() {
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return imagesy($this->image);
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}
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/**
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* {@inheritDoc}
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* @see \LAM\ImageUtils\ImageManipulator::getWidth()
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*/
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public function getWidth() {
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return imagesx($this->image);
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}
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/**
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* {@inheritDoc}
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* @see \LAM\ImageUtils\ImageManipulator::getAsJpeg()
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*/
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public function convertToJpeg() {
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$this->type = IMAGETYPE_JPEG;
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}
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/**
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* {@inheritDoc}
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* @see \LAM\ImageUtils\ImageManipulator::crop()
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*/
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public function crop($x, $y, $width, $height) {
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$this->image = imagecrop($this->image, array(
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'x' => $x,
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'y' => $y,
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'width' => $width,
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'height' => $height
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));
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}
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/**
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* {@inheritDoc}
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* @see \LAM\ImageUtils\ImageManipulator::resize()
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*/
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public function thumbnail($width, $height) {
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if (($this->getWidth() <= $width) && ($this->getHeight() <= $height)) {
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// skip if smaller than target size
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return;
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}
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$thumbWidth = $this->getWidth();
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$thumbHeight = $this->getHeight();
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if ($thumbWidth > $width) {
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$factor = $width / $thumbWidth;
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$thumbWidth = $thumbWidth * $factor;
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$thumbHeight = $thumbHeight * $factor;
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}
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if ($thumbHeight > $height) {
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$factor = $height / $thumbHeight;
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$thumbWidth = $thumbWidth * $factor;
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$thumbHeight = $thumbHeight * $factor;
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}
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$thumbnail = imagecreatetruecolor($thumbWidth, $thumbHeight);
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imagecopyresampled(
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$thumbnail,
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$this->image,
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0, 0, 0, 0,
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$thumbWidth,
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$thumbHeight,
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$this->getWidth(),
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$this->getHeight());
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$this->image = $thumbnail;
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}
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/**
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* {@inheritDoc}
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* @see \LAM\ImageUtils\ImageManipulator::getImageData()
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*/
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public function getImageData() {
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ob_start();
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if ($this->type == IMAGETYPE_JPEG) {
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imagejpeg($this->image);
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}
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else if ($this->type == IMAGETYPE_PNG) {
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imagepng($this->image);
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}
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$output = ob_get_contents();
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ob_clean();
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return $output;
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}
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}
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2018-08-19 17:13:16 +00:00
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?>
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