<?php
/**
* File: SimpleImage.php
* Author: Simon Jarvis
* Modified by: Miguel Fermín
* Based in: 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 {
public $image;
public $image_type;
public function __construct($filename = null){
if (!empty($filename)) {
$this->load($filename);
}
}
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);
} else {
throw new Exception(“The file you’re trying to open is not supported“);
}
}
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, $quality = 80) {
if ($image_type == IMAGETYPE_JPEG) {
header(“Content-type: image/jpeg“);
imagejpeg($this->image, null, $quality);
} elseif ($image_type == IMAGETYPE_GIF) {
header(“Content-type: image/gif“);
imagegif($this->image);
} elseif ($image_type == IMAGETYPE_PNG) {
header(“Content-type: image/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();
$width = round($this->getWidth() * $ratio);
$this->resize($width,$height);
}
public function resizeToWidth($width) {
$ratio = $width / $this->getWidth();
$height = round($this->getHeight() * $ratio);
$this->resize($width,$height);
}
public function square($size) {
$new_image = imagecreatetruecolor($size, $size);
if ($this->getWidth() > $this->getHeight()) {
$this->resizeToHeight($size);
imagecolortransparent($new_image, imagecolorallocate($new_image, 0, 0, 0));
imagealphablending($new_image, false);
imagesavealpha($new_image, true);
imagecopy($new_image, $this->image, 0, 0, ($this->getWidth() – $size) / 2, 0, $size, $size);
} else {
$this->resizeToWidth($size);
imagecolortransparent($new_image, imagecolorallocate($new_image, 0, 0, 0));
imagealphablending($new_image, false);
imagesavealpha($new_image, true);
imagecopy($new_image, $this->image, 0, 0, 0, ($this->getHeight() – $size) / 2, $size, $size);
}
$this->image = $new_image;
}
public function scale($scale) {
$width = $this->getWidth() * $scale/100;
$height = $this->getHeight() * $scale/100;
$this->resize($width,$height);
}
public function resize($width,$height) {
$new_image = imagecreatetruecolor($width, $height);
imagecolortransparent($new_image, imagecolorallocate($new_image, 0, 0, 0));
imagealphablending($new_image, false);
imagesavealpha($new_image, true);
imagecopyresampled($new_image, $this->image, 0, 0, 0, 0, $width, $height, $this->getWidth(), $this->getHeight());
$this->image = $new_image;
}
public function cut($x, $y, $width, $height) {
$new_image = imagecreatetruecolor($width, $height);
imagecolortransparent($new_image, imagecolorallocate($new_image, 0, 0, 0));
imagealphablending($new_image, false);
imagesavealpha($new_image, true);
imagecopy($new_image, $this->image, 0, 0, $x, $y, $width, $height);
$this->image = $new_image;
}
public function maxarea($width, $height = null) {
$height = $height ? $height : $width;
if ($this->getWidth() > $width) {
$this->resizeToWidth($width);
}
if ($this->getHeight() > $height) {
$this->resizeToheight($height);
}
}
public function minarea($width, $height = null) {
$height = $height ? $height : $width;
if ($this->getWidth() < $width) {
$this->resizeToWidth($width);
}
if ($this->getHeight() < $height) {
$this->resizeToheight($height);
}
}
public function cutFromCenter($width, $height) {
if ($width < $this->getWidth() && $width > $height) {
$this->resizeToWidth($width);
}
if ($height < $this->getHeight() && $width < $height) {
$this->resizeToHeight($height);
}
$x = ($this->getWidth() / 2) – ($width / 2);
$y = ($this->getHeight() / 2) – ($height / 2);
return $this->cut($x, $y, $width, $height);
}
public function maxareafill($width, $height, $red = 0, $green = 0, $blue = 0) {
$this->maxarea($width, $height);
$new_image = imagecreatetruecolor($width, $height);
$color_fill = imagecolorallocate($new_image, $red, $green, $blue);
imagefill($new_image, 0, 0, $color_fill);
imagecopyresampled( $new_image,
$this->image,
floor(($width – $this->getWidth())/2),
floor(($height–$this->getHeight())/2),
0, 0,
$this->getWidth(),
$this->getHeight(),
$this->getWidth(),
$this->getHeight()
);
$this->image = $new_image;
}
}
// Usage:
// Load the original image
$image = new SimpleImage(‘lemon.jpg‘);
// Resize the image to 600px width and the proportional height
$image->resizeToWidth(600);
$image->save(‘lemon_resized.jpg‘);
// Create a squared version of the image
$image->square(200);
$image->save(‘lemon_squared.jpg‘);
// Scales the image to 75%
$image->scale(75);
$image->save(‘lemon_scaled.jpg‘);
// Resize the image to specific width and height
$image->resize(80,60);
$image->save(‘lemon_resized2.jpg‘);
// Resize the canvas and fill the empty space with a color of your choice
$image->maxareafill(600,400, 32, 39, 240);
$image->save(‘lemon_filled.jpg‘);
// Output the image to the browser:
$image->output();