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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\Gd;
use Imagine\Image\AbstractLayers;
use Imagine\Exception\RuntimeException;
use Imagine\Image\Metadata\MetadataBag;
use Imagine\Image\Palette\PaletteInterface;
use Imagine\Exception\NotSupportedException;
class Layers extends AbstractLayers
{
private $image;
private $offset;
private $resource;
private $palette;
public function __construct(Image $image, PaletteInterface $palette, $resource)
{
if (!is_resource($resource)) {
throw new RuntimeException('Invalid Gd resource provided');
}
$this->image = $image;
$this->resource = $resource;
$this->offset = 0;
$this->palette = $palette;
}
/**
* {@inheritdoc}
*/
public function merge()
{
}
/**
* {@inheritdoc}
*/
public function coalesce()
{
}
/**
* {@inheritdoc}
*/
public function animate($format, $delay, $loops)
{
return $this;
}
/**
* {@inheritdoc}
*/
public function current()
{
return new Image($this->resource, $this->palette, new MetadataBag());
}
/**
* {@inheritdoc}
*/
public function key()
{
return $this->offset;
}
/**
* {@inheritdoc}
*/
public function next()
{
++$this->offset;
}
/**
* {@inheritdoc}
*/
public function rewind()
{
$this->offset = 0;
}
/**
* {@inheritdoc}
*/
public function valid()
{
return $this->offset < 1;
}
/**
* {@inheritdoc}
*/
public function count()
{
return 1;
}
/**
* {@inheritdoc}
*/
public function offsetExists($offset)
{
return 0 === $offset;
}
/**
* {@inheritdoc}
*/
public function offsetGet($offset)
{
if (0 === $offset) {
return new Image($this->resource, $this->palette, new MetadataBag());
}
throw new RuntimeException('GD only supports one layer at offset 0');
}
/**
* {@inheritdoc}
*/
public function offsetSet($offset, $value)
{
throw new NotSupportedException('GD does not support layer set');
}
/**
* {@inheritdoc}
*/
public function offsetUnset($offset)
{
throw new NotSupportedException('GD does not support layer unset');
}
}
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