/system/classes/libraries/image/driver/imagemagick.php
PHP | 190 lines | 159 code | 8 blank | 23 comment | 3 complexity | 4ca2aad934fb3c971881d8c6fc00dce8 MD5 | raw file
Possible License(s): BSD-3-Clause
- <?php
- /**
- * ImageMagick Image Driver.
- *
- * @package System
- * @subpackage Libraries.Image
- * @author EightPHP Development Team
- * @copyright (c) 2009-2010 EightPHP
- * @license http://license.eightphp.com
- */
- class Image_Driver_ImageMagick_Core extends Image_Driver {
- // Directory that IM is installed in
- protected $dir = '';
- // Command extension (exe for windows)
- protected $ext = '';
- // Temporary image filename
- protected $tmp_image;
- /**
- * Attempts to detect the ImageMagick installation directory.
- *
- * @throws Eight_Exception
- * @param array configuration
- * @return void
- */
- public function __construct($config) {
- if(empty($config['directory'])) {
- // Attempt to locate IM by using "which" (only works for *nix!)
- if(!is_file($path = exec('which convert')))
- throw new Eight_Exception('image.imagemagick.not_found');
- $config['directory'] = dirname($path);
- }
- // Set the command extension
- $this->ext = (PHP_SHLIB_SUFFIX === 'dll') ? '.exe' : '';
- // Check to make sure the provided path is correct
- if(!is_file(realpath($config['directory']).'/convert'.$this->ext))
- throw new Eight_Exception('image.imagemagick.not_found', 'convert'.$this->ext);
- // Set the installation directory
- $this->dir = str_replace('\\', '/', realpath($config['directory'])).'/';
- }
- /**
- * Creates a temporary image and executes the given actions. By creating a
- * temporary copy of the image before manipulating it, this process is atomic.
- */
- public function process($image, $actions, $dir, $file, $render = NO) {
- // We only need the filename
- $image = $image['file'];
- // Unique temporary filename
- $this->tmp_image = $dir.'k2img--'.sha1(time().$dir.$file).substr($file, strrpos($file, '.'));
- // Copy the image to the temporary file
- copy($image, $this->tmp_image);
- // Quality change is done last
- $quality = (int) arr::remove('quality', $actions);
- // Use 95 for the default quality
- empty($quality) and $quality = 95;
- // All calls to these will need to be escaped, so do it now
- $this->cmd_image = escapeshellarg($this->tmp_image);
- $this->new_image = ($render)? $this->cmd_image : escapeshellarg($dir.$file);
- if($status = $this->execute($actions)) {
- // Use convert to change the image into its final version. This is
- // done to allow the file type to change correctly, and to handle
- // the quality conversion in the most effective way possible.
- if($error = exec(escapeshellcmd($this->dir.'convert'.$this->ext).' -quality '.$quality.'% '.$this->cmd_image.' '.$this->new_image)) {
- $this->errors[] = $error;
- } else {
- // Output the image directly to the browser
- if($render !== NO) {
- $contents = file_get_contents($this->tmp_image);
- switch (substr($file, strrpos($file, '.') + 1)) {
- case 'jpg':
- case 'jpeg':
- header('Content-Type: image/jpeg');
- break;
- case 'gif':
- header('Content-Type: image/gif');
- break;
- case 'png':
- header('Content-Type: image/png');
- break;
- }
- echo $contents;
- }
- }
- }
- // Remove the temporary image
- unlink($this->tmp_image);
- $this->tmp_image = '';
- return $status;
- }
- public function crop($prop) {
- // Sanitize and normalize the properties into geometry
- $this->sanitize_geometry($prop);
- // Set the IM geometry based on the properties
- $geometry = escapeshellarg($prop['width'].'x'.$prop['height'].'+'.$prop['left'].'+'.$prop['top']);
- if($error = exec(escapeshellcmd($this->dir.'convert'.$this->ext).' -crop '.$geometry.' '.$this->cmd_image.' '.$this->cmd_image)) {
- $this->errors[] = $error;
- return NO;
- }
- return YES;
- }
- public function flip($dir) {
- // Convert the direction into a IM command
- $dir = ($dir === Image::HORIZONTAL) ? '-flop' : '-flip';
- if($error = exec(escapeshellcmd($this->dir.'convert'.$this->ext).' '.$dir.' '.$this->cmd_image.' '.$this->cmd_image)) {
- $this->errors[] = $error;
- return NO;
- }
- return YES;
- }
- public function resize($prop) {
- switch ($prop['master']) {
- case Image::WIDTH: // Wx
- $dim = escapeshellarg($prop['width'].'x');
- break;
- case Image::HEIGHT: // xH
- $dim = escapeshellarg('x'.$prop['height']);
- break;
- case Image::AUTO: // WxH
- $dim = escapeshellarg($prop['width'].'x'.$prop['height']);
- break;
- case Image::NONE: // WxH!
- $dim = escapeshellarg($prop['width'].'x'.$prop['height'].'!');
- break;
- }
- // Use "convert" to change the width and height
- if($error = exec(escapeshellcmd($this->dir.'convert'.$this->ext).' -resize '.$dim.' '.$this->cmd_image.' '.$this->cmd_image)) {
- $this->errors[] = $error;
- return NO;
- }
- return YES;
- }
- public function rotate($amt) {
- if($error = exec(escapeshellcmd($this->dir.'convert'.$this->ext).' -rotate '.escapeshellarg($amt).' -background transparent '.$this->cmd_image.' '.$this->cmd_image)) {
- $this->errors[] = $error;
- return NO;
- }
- return YES;
- }
- public function sharpen($amount) {
- // Set the sigma, radius, and amount. The amount formula allows a nice
- // spread between 1 and 100 without pixelizing the image badly.
- $sigma = 0.5;
- $radius = $sigma * 2;
- $amount = round(($amount / 80) * 3.14, 2);
- // Convert the amount to an IM command
- $sharpen = escapeshellarg($radius.'x'.$sigma.'+'.$amount.'+0');
- if($error = exec(escapeshellcmd($this->dir.'convert'.$this->ext).' -unsharp '.$sharpen.' '.$this->cmd_image.' '.$this->cmd_image)) {
- $this->errors[] = $error;
- return NO;
- }
- return YES;
- }
- protected function properties() {
- return array_slice(getimagesize($this->tmp_image), 0, 2, NO);
- }
- } // End Image ImageMagick Driver