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<?php
/*
* This file is part of the Imagine package.
*
* (c) Bulat Shakirzyanov <mallluhuct@gmail.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Imagine\Image;
use Imagine\Exception\RuntimeException;
use Imagine\Exception\InvalidArgumentException;
use Imagine\Exception\OutOfBoundsException;
/**
* The layers interface
*/
interface LayersInterface extends \Iterator, \Countable, \ArrayAccess
{
/**
* Merge layers into the original objects
*
* @throws RuntimeException
*/
public function merge();
/**
* Animates layers
*
* @param string $format The output output format
* @param integer $delay The delay in milliseconds between two frames
* @param integer $loops The number of loops, 0 means infinite
*
* @return LayersInterface
*
* @throws InvalidArgumentException In case an invalid argument is provided
* @throws RuntimeException In case the driver fails to animate
*/
public function animate($format, $delay, $loops);
/**
* Coalesce layers. Each layer in the sequence is the same size as the first and composited with the next layer in
* the sequence.
*/
public function coalesce();
/**
* Adds an image at the end of the layers stack
*
* @param ImageInterface $image
*
* @return LayersInterface
*
* @throws RuntimeException
*/
public function add(ImageInterface $image);
/**
* Set an image at offset
*
* @param integer $offset
* @param ImageInterface $image
*
* @return LayersInterface
*
* @throws RuntimeException
* @throws InvalidArgumentException
* @throws OutOfBoundsException
*/
public function set($offset, ImageInterface $image);
/**
* Removes the image at offset
*
* @param integer $offset
*
* @return LayersInterface
*
* @throws RuntimeException
* @throws InvalidArgumentException
*/
public function remove($offset);
/**
* Returns the image at offset
*
* @param integer $offset
*
* @return ImageInterface
*
* @throws RuntimeException
* @throws InvalidArgumentException
*/
public function get($offset);
/**
* Returns true if a layer at offset is preset
*
* @param integer $offset
*
* @return Boolean
*/
public function has($offset);
}
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