Optipng.php

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<?php
 
namespace Depage\Graphics\Optimizers;
 
class Optipng extends Optimizer
{
    protected $version;
 
    public function __construct($options = array())
    {
        parent::__construct($options);
 
        if (isset($this->options['optipng'])) {
            $this->executable = $this->options['optipng'];
        }
 
        if (is_null($this->executable)) {
            $this->executable = \Depage\Graphics\Graphics::which("optipng");
        }
 
        if ($this->executable) {
            exec($this->executable . ' --version 2>&1', $commandOutput, $returnStatus);
 
            preg_match("/(\d+).(\d+).(\d+)/", $commandOutput[0], $matches);
 
            $this->version = $matches[0];
        }
    }
 
    public function optimize($filename)
    {
        if (!$this->executable) {
            return false;
        }
 
        $this->command = "{$this->executable} ";
        
        // 2 is the default (8 trials) -> may change between versions
        //$this->command .= "-o 2 ";
        
        if (version_compare($this->version, '0.7.0', '>=')) {
            // strip got added in version 0.7
            $this->command .= "-strip all ";
        }
        
        $this->command .= "-preserve ";
 
        $this->command .= " " . escapeshellarg($filename);
 
        return $this->execCommand();
    }
}
 
/* vim:set ft=php sw=4 sts=4 fdm=marker et : */