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File: image
Role: Class source
Content type: text/plain
Description: The main class
Class: HolyImage
Resize images of different formats
Author: By
Last change: When output now the type is optional
Date: 13 years ago
Size: 10,976 bytes
 

Contents

Class file image Download
<?php /** * Class that uses GD library to maintain and make various operations to an image * * @author Marcos Luiz Cassarini Taranta <marcos.taranta@gmail.com> * @since 2009-01-20 * @package view */ define("GIF", "image/gif"); define("JPEG", "image/jpeg"); define("PNG", "image/png"); class Image { private $handler; // GD handler of the image private $height; // Height of the image private $mimetype; // Mimetype of the image public static $allowedMimetypes = array( "image/gif", "image/jpeg", "image/png", ); // Allowed mimetypes private $width; // Width of the image /** * @return the GD image handler to the image */ public function getHandler() { return $this->handler; } /** * @return the image current height */ public function getHeight() { return $this->height; } /** * @return the image mimetype */ public function getMimetype() { return $this->mimetype; } /** * @return the image current width */ public function getWidth() { return $this->width; } /** * Sets the handler of the image file from the filename or create a new image from the width and height * * @param string $filename filename to the existing image file * @param integer $width width of the new image * @param integer $height height of the new image */ function __construct($filename = "", $width = 0, $height = 0) { if((empty($filename) || gettype($filename) != "string") && ($width == 0 || gettype($width) != "integer") && ($height == 0 || gettype($height) != "integer")) { throw new Exception("Wrong parameters"); return; } if(!empty($filename)) { if(file_exists($filename)) { $fileExtension = explode(".", $filename); $fileExtension = $fileExtension[count($fileExtension) - 1]; if(!empty($fileExtension)) { switch($fileExtension) { case "gif": $this->handler = imagecreatefromgif($filename); $this->mimetype = "image/gif"; list($this->width, $this->height) = getimagesize($filename); break; case "jpeg": case "jpg": $this->handler = imagecreatefromjpeg($filename); $this->mimetype = "image/jpeg"; list($this->width, $this->height) = getimagesize($filename); break; case "png": $this->handler = imagecreatefrompng($filename); $this->mimetype = "image/png"; list($this->width, $this->height) = getimagesize($filename); break; default: unset($this->mimetype); break; } } else { throw new ErrorException("Mimetype not supported"); } } else { throw new ErrorException("File do not exist"); } } else { $this->handler = imagecreatetruecolor($width, $height); $this->widht = $width; $this->height = $height; } if(!isset($this->handler)) throw new ErrorException("Image could not be created"); } /** * Only makes sure that the image will be destroyed to free the memory */ function __destruct() { if(isset($this->handler)) imagedestroy($this->handler); } /** * Output the object image, if a filename is especified the image will be saved, if dont, the image will be displayed * * @param string $type type of the output image, use GIF, JPEG or PNG constants * @param string $filename filename of the image file to be saved * @param integer $quality quality of the output image for JPEG need to be between 0~100, for PNG is used for compression, need to be between 0~9 */ public function output($type = "", $filename = "", $quality = "") { if(!isset($this->handler)) { throw new ErrorException("Invalid image handler"); } if((empty($type) || gettype($type) != "string") && !empty($this->mimetype) && gettype($this->mimetype) == "string") $type = $this->mimetype; if(!empty($filename) && gettype($filename) == "string") { switch($type) { case GIF: imagegif($this->handler, $filename); break; case JPEG: if(empty($quality) || gettype($quality) != "integer") $quality = 75; if($quality >= 0 && $quality <= 100) { imagejpeg($this->handler, $filename, $quality); } else { imagejpeg($this->handler, $filename); } break; case PNG: if(empty($quality) || gettype($quality) != "integer") $quality = 9; if($quality >= 0 && $quality <= 9) { imagepng($this->handler, $filename, $quality); } else { imagepng($this->handler, $filename); } break; default: throw new ErrorException("Invalid image output type"); break; } } else { switch($type) { case GIF: imagegif($this->handler); break; case JPEG: if($quality >= 0 && $quality <= 100) { imagejpeg($this->handler, NULL, $quality); } else { imagejpeg($this->handler); } break; case PNG: if($quality >= 0 && $quality <= 9) { imagepng($this->handler, NULL, $quality); } else { imagepng($this->handler); } break; default: throw new ErrorException("Invalid image output type"); break; } } } /** * Simply resample the object image to the desired width and height without maintaining any proportion * * @param integer $width new width of the image * @param integer $height new height of the image */ public function resample($width, $height) { if(!isset($this->handler)) { throw new ErrorException("Invalid image handler"); } else if($this->width <= 0 || !isset($this->width) || gettype($this->width) != "integer") { throw new ErrorException("Invalid image width"); } else if($this->height <= 0 || !isset($this->height) || gettype($this->height) != "integer") { throw new ErrorException("Invalid image height"); } else if($width <= 0 || gettype($width) != "integer") { throw new ErrorException("Invalid new width"); } else if($height <= 0 || gettype($height) != "integer") { throw new ErrorException("Invalid new height"); } $resampledImage = imagecreatetruecolor($width, $height); imagecopyresampled($resampledImage, $this->handler, 0, 0, 0, 0, $width, $height, $this->width, $this->height); if(!isset($resampledImage)) { throw new ErrorException("The image could not be resampled"); } else { $this->handler = $resampledImage; $this->width = $width; $this->height = $height; } } /** * Crops and resample the object image so it will have the proportion of the new width and height * * @param integer $width new width of the image * @param integer $height new height of the image */ public function resampleCropProportion($width, $height) { if(!isset($this->handler)) { throw new ErrorException("Invalid image handler"); } else if($this->width <= 0 || !isset($this->width) || gettype($this->width) != "integer") { throw new ErrorException("Invalid image width"); } else if($this->height <= 0 || !isset($this->height) || gettype($this->height) != "integer") { throw new ErrorException("Invalid image height"); } else if($width <= 0 || gettype($width) != "integer") { throw new ErrorException("Invalid new width"); } else if($height <= 0 || gettype($height) != "integer") { throw new ErrorException("Invalid new height"); } $resampledImage = imagecreatetruecolor($width, $height); if(($width / $height) < ($this->width / $this->height)) { $newWidth = floor($this->height * ($width / $height)); $difference = $this->width - $newWidth; $x = floor($difference / 2); imagecopyresampled($resampledImage, $this->handler, 0, 0, $x, 0, $width, $height, $newWidth, $this->height); } else if(($width / $height) > ($this->width / $this->height)) { $newHeight = floor($this->width * ($height / $width)); $difference = $this->height - $newHeight; $y = floor($difference / 2); imagecopyresampled($resampledImage, $this->handler, 0, 0, 0, $y, $width, $height, $this->width, $newHeight); } else { imagecopyresampled($resampledImage, $this->handler, 0, 0, 0, 0, $width, $height, $this->width, $this->height); } if(!isset($resampledImage)) { throw new ErrorException("The image could not be resampled"); } else { $this->handler = $resampledImage; $this->width = $width; $this->height = $height; } } /** * Resample the object image to the new height maintaining the original proportion * * @param integer $height new height of the image */ public function resampleProportionHeight($height) { if(!isset($this->handler)) { throw new ErrorException("Invalid image handler"); } else if($this->width <= 0 || !isset($this->width) || gettype($this->width) != "integer") { throw new ErrorException("Invalid image width"); } else if($this->height <= 0 || !isset($this->height) || gettype($this->height) != "integer") { throw new ErrorException("Invalid image height"); } else if($height <= 0 || gettype($height) != "integer") { throw new ErrorException("Invalid new height"); } $newWidth = floor($height * ($this->width / $this->height)); $resampledImage = imagecreatetruecolor($newWidth, $height); imagecopyresampled($resampledImage, $this->handler, 0, 0, 0, 0, $newWidth, $height, $this->width, $this->height); if(!isset($resampledImage)) { throw new ErrorException("The image could not be resampled"); } else { $this->handler = $resampledImage; $this->width = $newWidth; $this->height = $height; } } /** * Resample the object image to the new width maintaining the original proportion * * @param integer $width new width of the image */ public function resampleProportionWidth($width) { if(!isset($this->handler)) { throw new ErrorException("Invalid image handler"); } else if($this->width <= 0 || !isset($this->width) || gettype($this->width) != "integer") { throw new ErrorException("Invalid image width"); } else if($this->height <= 0 || !isset($this->height) || gettype($this->height) != "integer") { throw new ErrorException("Invalid image height"); } else if($width <= 0 || gettype($width) != "integer") { throw new ErrorException("Invalid new width"); } $newHeight = floor($width * ($this->height / $this->width)); $resampledImage = imagecreatetruecolor($width, $newHeight); imagecopyresampled($resampledImage, $this->handler, 0, 0, 0, 0, $width, $newHeight, $this->width, $this->height); if(!isset($resampledImage)) { throw new ErrorException("The image could not be resampled"); } else { $this->handler = $resampledImage; $this->width = $width; $this->height = $newHeight; } } } ?>