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Diffstat (limited to 'Library/Image/Gd/Thumbnail.php')
| -rw-r--r-- | Library/Image/Gd/Thumbnail.php | 220 |
1 files changed, 220 insertions, 0 deletions
diff --git a/Library/Image/Gd/Thumbnail.php b/Library/Image/Gd/Thumbnail.php new file mode 100644 index 0000000..22e501e --- /dev/null +++ b/Library/Image/Gd/Thumbnail.php @@ -0,0 +1,220 @@ +<?php + +// EasyGiant is a PHP framework for creating and managing dynamic content +// +// Copyright (C) 2009 - 2011 Antonio Gallo +// See COPYRIGHT.txt and LICENSE.txt. +// +// This file is part of EasyGiant +// +// EasyGiant is free software: you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation, either version 3 of the License, or +// (at your option) any later version. +// +// EasyGiant is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with EasyGiant. If not, see <http://www.gnu.org/licenses/>. + +if (!defined('EG')) die('Direct access not allowed!'); + +//class to create a thumbnail +class Image_Gd_Thumbnail +{ + const DS = DIRECTORY_SEPARATOR; + + private $params = array(); //parameters of the object + private $basePath = null; //the path of the folder inside which the images are saved + + public function __construct($basePath,$params = null) + { + $finalChar = $basePath[strlen($basePath) - 1]; + if (strcmp($finalChar,self::DS) !== 0) $basePath .= self::DS; + + $this->basePath = $basePath; + + $defaultParams = array( + 'imgWidth' => null, + 'imgHeight' => null, + 'defaultImage' => null, + 'cropImage' => 'no', + 'horizAlign' => 'left', + 'vertAlign' => 'top', + 'resample' => 'yes', + 'function' => 'none', + 'outputFormat' => 'jpeg', + ); + + //set the $this->scaffold->params array + if (is_array($params)) + { + foreach ($params as $key => $value) + { + $defaultParams[$key] = $value; + } + } + $this->params = $defaultParams; + } + + //create the thumbnail + //$imageName: the name of the file inside $this->basePath + //$outputFile: the name of the output file + public function render($imageFile, $outputFile = null) + { + $imagePath = $this->basePath . basename($imageFile); + + if (!file_exists($imagePath) and isset($this->params['defaultImage'])) $imagePath = $this->params['defaultImage']; + + $img = null; + $type = 'jpeg'; + $contentType = 'image/jpeg'; + + if (file_exists($imagePath)) + { + $ext = strtolower(end(explode('.', $imagePath))); + + if (strcmp($ext,'jpg') === 0 or strcmp($ext,'jpeg') === 0) { + $img = @imagecreatefromjpeg($imagePath); + $type = 'jpeg'; + $contentType = 'image/jpeg'; + } else if (strcmp($ext,'png') === 0) { + $img = @imagecreatefrompng($imagePath); + $type = 'png'; + $contentType = 'image/png'; + } else if (strcmp($ext,'gif') === 0) { + $img = @imagecreatefromgif($imagePath); + $type = 'gif'; + $contentType = 'image/gif'; + } + } + + //If an image was successfully loaded, test the image for size + if ($img) + { + //image size + $width = imagesx($img); + $height = imagesy($img); + + if (!isset($this->params['imgWidth'])) $this->params['imgWidth'] = $width; + if (!isset($this->params['imgHeight'])) $this->params['imgHeight'] = $height; + + if ($this->params['cropImage'] === 'no') + { + $scale = min($this->params['imgWidth']/$width, $this->params['imgHeight']/$height); + } + else if ($this->params['cropImage'] === 'yes') + { + $scale = max($this->params['imgWidth']/$width, $this->params['imgHeight']/$height); + } + + if ($scale < 1) { + + $xSrc = 0; + $ySrc = 0; + + if ($this->params['cropImage'] === 'no') + { + $newWidth = floor($scale*$width); + $newHeight = floor($scale*$height); + } + else if ($this->params['cropImage'] === 'yes') + { + + $newWidth = $this->params['imgWidth']; + $newHeight = $this->params['imgHeight']; + $oldWidth = $width; + $oldHeight = $height; + $width = floor($newWidth/$scale); + $height = floor($newHeight/$scale); + + switch ($this->params['horizAlign']) + { + case 'left': + $xSrc = 0; + break; + case 'right': + $xSrc = floor(($oldWidth-$width)); + break; + case 'center': + $xSrc = floor(($oldWidth-$width)/2); + break; + default: + $xSrc = $this->params['horizAlign']; + } + + switch ($this->params['vertAlign']) + { + case 'top': + $ySrc = 0; + break; + case 'bottom': + $ySrc = floor(($oldHeight-$height)); + break; + case 'center': + $ySrc = floor(($oldHeight-$height)/2); + break; + default: + $ySrc = $this->params['vertAlign']; + } + + } + + //temp image + $tmpImg = imagecreatetruecolor($newWidth, $newHeight); + + if ($this->params['resample'] === 'yes') + { + //copy and resample + imagecopyresampled($tmpImg, $img, 0, 0, $xSrc, $ySrc,$newWidth, $newHeight, $width, $height); + } + else + { + //copy and resize + imagecopyresized($tmpImg, $img, 0, 0, $xSrc, $ySrc,$newWidth, $newHeight, $width, $height); + } + imagedestroy($img); + $img = $tmpImg; + + if (!function_exists($this->params['function'])) { + throw new Exception('Error in <b>'.__METHOD__.'</b>: function <b>'.$this->params['function']. '</b> does not exist'); + } + + $img = call_user_func($this->params['function'],$img); + } + + } + + if (!$img) + { + $imgWidth = isset($this->params['imgWidth']) ? $this->params['imgWidth'] : 100; + $imgHeight = isset($this->params['imgHeight']) ? $this->params['imgHeight'] : 100; + + $img = imagecreate($imgWidth, $imgHeight); + imagecolorallocate($img,200,200,200); + } + + //print the image + if (!isset($outputFile)) + { + header("Content-type: $contentType"); + } + + if (strcmp($type,'png') === 0) + { + imagepng($img,$outputFile,9); + } + else if (strcmp($type,'gif') === 0) + { + imagegif($img,$outputFile); + } + else + { + imagejpeg($img,$outputFile,90); + } + } + +}
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