mako\image\ImageMagick

public function __construct($file)
{
	static $check = false;
	
	// Check if all the requirements are met
	
	if($check === false)
	{	
		if(function_exists('exec') === false)
		{
			throw new RuntimeException(vsprintf("%s(): The 'exec' function has been disabled.", array(__METHOD__)));
		}

		$check = true;
	}
	
	$this->image = escapeshellarg($file);
}

public function rotate($degrees)
{		
	$this->cmd .= '-rotate ' . escapeshellarg((360 - $degrees)) . ' ';

	return $this;
}

public function resize($width, $height = null, $aspectRatio = null)
{
	if($height === null)
	{				
		$this->cmd .= '-resize ' . escapeshellarg((int) $width . '%') . ' ';
	}
	else
	{
		if($aspectRatio === Image::AUTO)
		{
			// Calculate smallest size based on given height and width while maintaining aspect ratio

			$this->cmd .= '-resize ' . escapeshellarg((int) $width . 'x' . (int) $height) . ' ';
		}
		else if($aspectRatio === Image::WIDTH)
		{
			// Base new size on given width while maintaining aspect ratio

			$this->cmd .= '-resize ' . escapeshellarg((int) $width) . ' ';
		}
		else if($aspectRatio === Image::HEIGHT)
		{
			// Base new size on given height while maintaining aspect ratio

			$this->cmd .= '-resize ' . escapeshellarg('x' . (int) $height) . ' ';
		}
		else
		{
			// Ignone aspect ratio
			
			$this->cmd .= '-resize ' . escapeshellarg((int) $width . 'x' . (int) $height . '!') . ' ';
		}						
	}

	return $this;
}

public function crop($width, $height, $x, $y)
{			
	$this->cmd .= '-crop ' . escapeshellarg((int) $width . 'x' . (int) $height . '+' . (int) $x . '+' . (int) $y) . ' ';
	
	return $this;
}

public function flip($direction = null)
{
	if($direction ===  Image::VERTICAL)
	{
		// Flips the image in the vertical direction

		$this->cmd .= '-flip ';
	}
	else
	{
		// Flips the image in the horizontal direction

		$this->cmd .= '-flop ';
	}

	return $this;
}

public function watermark($file, $position = null, $opacity = 100)
{
	// Check if the image exists
	
	if(file_exists($file) === false)
	{
		throw new RuntimeException(vsprintf("%s(): The image file ('%s') does not exist.", array(__METHOD__, $file)));
	}
	
	// Make sure that opacity is between 0 and 100
	
	$opacity = max(min((int) $opacity, 100), 0);
	
	// Position the watermark.
	
	switch($position)
	{
		case Image::TOP_RIGHT:
			$pos = 'NorthEast';
		break;
		case Image::BOTTOM_LEFT:
			$pos = 'SouthWest';
		break;
		case Image::BOTTOM_RIGHT:
			$pos = 'SouthEast';
		break;
		case Image::CENTER:
			$pos = 'Center';
		break;
		default:
			$pos = 'NorthWest';
	}
	
	$this->cmd .= '- | composite -dissolve ' . escapeshellarg($opacity) . '% -gravity ' . escapeshellarg($pos) . ' ' . escapeshellarg($file) . ' - - | convert - ';
	
	return $this;
}

public function greyscale()
{
	$this->cmd .= '-fx \'(r+g+b)/3\' ';
	
	return $this;
}

public function colorize($color)
{
	$this->cmd .= '-fill ' . escapeshellarg($color) . ' -colorize 50% ';

	return $this;
}

public function border($color = '#000', $thickness = 5)
{
	$this->cmd .= '-shave ' . escapeshellarg($thickness . 'x' . $thickness) . ' -bordercolor ' . escapeshellarg($color) . ' -border ' . escapeshellarg($thickness) . ' ';
	
	return $this;
}

public function save($file, $quality = 85)
{
	// Check if image save path is writable

	$pathInfo = pathinfo($file);

	if(!is_writable($pathInfo['dirname']))
	{
		throw new RuntimeException(vsprintf("%s(): '%s' is not writable.", array(__METHOD__, $pathInfo['dirname'])));
	}
	
	// Make sure that quality is between 0 and 100
	
	$quality = max(min((int) $quality, 100), 0);

	// Manipulate and save image

	$file      = escapeshellarg($file);
	$quality   = escapeshellarg((int) $quality.'%');
	$this->cmd = trim($this->cmd);

	exec("convert {$this->image} {$this->cmd} -quality {$quality} {$file}", $output, $code);

	if($code !== 0)
	{
		$error = ($code === 127) ? 'ImageMagick could not be found.' : 'An error occured.';

		throw new RuntimeException(vsprintf("%s(): %s", array(__METHOD__, $error)));
	}
}