/
Layers.php
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/
Layers.php
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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\Gmagick;
use Imagine\Image\LayersInterface;
use Imagine\Exception\RuntimeException;
class Layers implements LayersInterface
{
/**
* @var Image
*/
private $image;
/**
* @var \Gmagick
*/
private $resource;
/**
* @var integer
*/
private $offset = 0;
/**
* @var array
*/
private $layers = array();
public function __construct(Image $image, \Gmagick $resource)
{
$this->image = $image;
$this->resource = $resource;
}
/**
* {@inheritdoc}
*/
public function merge()
{
foreach ($this->layers as $offset => $image) {
try {
$this->resource->setimageindex($offset);
$this->resource->setimage($image);
} catch (\GmagickException $e) {
throw new RuntimeException(
'Failed to substitute layer', $e->getCode(), $e
);
}
}
}
/**
* {@inheritdoc}
*/
public function coalesce()
{
throw new RuntimeException("Gmagick does not support coalescing");
}
/**
* {@inheritdoc}
*/
public function current()
{
if (!isset($this->layers[$this->offset])) {
try {
$this->resource->setimageindex($this->offset);
$this->layers[$this->offset] = $this->resource->getimage();
} catch (\GmagickException $e) {
throw new RuntimeException(
sprintf('Failed to extract layer %d', $this->offset),
$e->getCode(), $e
);
}
}
return new Image($this->layers[$this->offset]);
}
/**
* {@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 $this->offset < count($this);
}
/**
* {@inheritdoc}
*/
public function count()
{
try {
return $this->resource->getnumberimages();
} catch (\GmagickException $e) {
throw new RuntimeException(
'Failed to count the number of layers', $e->getCode(), $e
);
}
}
}