<?php
/**
* This file is part of the PHP Video Toolkit v2 package.
*
* @author Oliver Lillie (aka buggedcom) <publicmail@buggedcom.co.uk>
* @license Dual licensed under MIT and GPLv2
* @copyright Copyright (c) 2008-2014 Oliver Lillie <http://www.buggedcom.co.uk>
* @package PHPVideoToolkit V2
* @version 2.1.7-beta
* @uses ffmpeg http://ffmpeg.sourceforge.net/
*/
namespace PHPVideoToolkit;
/**
* This class provides an animated gif transcoder engine that uses imagemagick convert server programme to create the
* animated gif.
*
* @author Oliver Lillie
*/
class AnimatedGifTranscoderConvert extends AnimatedGifTranscoderAbstract
{
/**
* Saves the animated gif.
*
* @access public
* @author Oliver Lillie
* @param string $save_path The path to save the animated gif to.
* @return Image Returns a new instance of PHPVideoToolkit\Image with the new animated gif as the src.
* @throws AnimatedGifException If the convert process encounters an error.
*/
public function save($save_path)
{
$save_path = parent::save($save_path);
// build the gifsicle process
$process = new ProcessBuilder('convert', $this->_config);
// set the frame duration
$process->add('-delay')->add($this->_frame_delay*100);
$process->add('-loop')->add($this->_loop_count === AnimatedGif::UNLIMITED_LOOPS ? '0' : $this->_loop_count+1);
// add in all the frames
foreach ($this->_frames as $path)
{
$process->add($path);
}
if($this->_config->gif_transcoder_convert_use_dither === true)
{
$process->add('-ordered-dither')->add($this->_config->gif_transcoder_convert_dither_order);
}
if($this->_config->gif_transcoder_convert_use_coalesce === true)
{
$process->add('-coalesce');
}
$process->add('-layers')->add('OptimizeTransparency');
if($this->_config->gif_transcoder_convert_use_map === true)
{
$process->add('+map');
}
// add the output path
$process->add($save_path);
// execute the process.
$exec = $process->getExecBuffer();
$exec->setBlocking(true)
->execute();
// check for any gifsicle errors
if($exec->hasError() === true)
{
throw new AnimatedGifException('AnimatedGif save using `convert` "'.$save_path.'" failed. Any additional convert message follows:
'.$exec->getBuffer());
}
return new Image($save_path, $this->_config);
}
/**
* Determines if the convert transcoder engine is available on the current system.
*
* @access public
* @static
* @author Oliver Lillie
* @param Config $config The configuration object.
* @return boolean Returns true if this engine can be used, otherwise false.
*/
public static function available(Config $config)
{
if($config->convert === null)
{
return false;
}
try
{
Binary::locate($config->convert);
return true;
}
catch(BinaryException $e)
{
return false;
}
}
}
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