Created
April 29, 2014 15:13
-
-
Save nomisoft/11403298 to your computer and use it in GitHub Desktop.
PHP Image Resizing Script
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
<?php | |
/* | |
* File: SimpleImage.php | |
* Author: Simon Jarvis | |
* Copyright: 2006 Simon Jarvis | |
* Date: 08/11/06 | |
* Link: http://www.white-hat-web-design.co.uk/articles/php-image-resizing.php | |
* | |
* This program 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 2 | |
* of the License, or (at your option) any later version. | |
* | |
* This program 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: | |
* http://www.gnu.org/licenses/gpl.html | |
* | |
*/ | |
class SimpleImage { | |
private $image; | |
private $image_type; | |
public function load($filename) { | |
$image_info = getimagesize($filename); | |
$this->image_type = $image_info[2]; | |
if( $this->image_type == IMAGETYPE_JPEG ) { | |
$this->image = imagecreatefromjpeg($filename); | |
} elseif( $this->image_type == IMAGETYPE_GIF ) { | |
$this->image = imagecreatefromgif($filename); | |
} elseif( $this->image_type == IMAGETYPE_PNG ) { | |
$this->image = imagecreatefrompng($filename); | |
} | |
} | |
public function save($filename, $image_type=IMAGETYPE_JPEG, $compression=75, $permissions=null) { | |
if( $image_type == IMAGETYPE_JPEG ) { | |
imagejpeg($this->image,$filename,$compression); | |
} elseif( $image_type == IMAGETYPE_GIF ) { | |
imagegif($this->image,$filename); | |
} elseif( $image_type == IMAGETYPE_PNG ) { | |
imagepng($this->image,$filename); | |
} | |
if( $permissions != null) { | |
chmod($filename,$permissions); | |
} | |
} | |
public function output($image_type=IMAGETYPE_JPEG) { | |
if( $image_type == IMAGETYPE_JPEG ) { | |
imagejpeg($this->image); | |
} elseif( $image_type == IMAGETYPE_GIF ) { | |
imagegif($this->image); | |
} elseif( $image_type == IMAGETYPE_PNG ) { | |
imagepng($this->image); | |
} | |
} | |
public function getWidth() { | |
return imagesx($this->image); | |
} | |
public function getHeight() { | |
return imagesy($this->image); | |
} | |
public function resizeToHeight($height) { | |
$ratio = $height / $this->getHeight(); | |
$width = $this->getWidth() * $ratio; | |
$this->resize($width,$height); | |
} | |
public function resizeToWidth($width) { | |
$ratio = $width / $this->getWidth(); | |
$height = $this->getheight() * $ratio; | |
$this->resize($width,$height); | |
} | |
public function scale($scale) { | |
$width = $this->getWidth() * $scale/100; | |
$height = $this->getheight() * $scale/100; | |
$this->resize($width,$height); | |
} | |
public function resize($width,$height) { | |
$new_image = imagecreatetruecolor($width, $height); | |
if( $this->image_type == IMAGETYPE_GIF || $this->image_type == IMAGETYPE_PNG ) { | |
$current_transparent = imagecolortransparent($this->image); | |
if($current_transparent != -1) { | |
$transparent_color = imagecolorsforindex($this->image, $current_transparent); | |
$current_transparent = imagecolorallocate($new_image, $transparent_color['red'], $transparent_color['green'], $transparent_color['blue']); | |
imagefill($new_image, 0, 0, $current_transparent); | |
imagecolortransparent($new_image, $current_transparent); | |
} elseif( $this->image_type == IMAGETYPE_PNG) { | |
imagealphablending($new_image, false); | |
$color = imagecolorallocatealpha($new_image, 0, 0, 0, 127); | |
imagefill($new_image, 0, 0, $color); | |
imagesavealpha($new_image, true); | |
} | |
} | |
imagecopyresampled($new_image, $this->image, 0, 0, 0, 0, $width, $height, $this->getWidth(), $this->getHeight()); | |
$this->image = $new_image; | |
} | |
} | |
?> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Hi,
Thanks for your script. It works quite well but the trensparency turns into black.