/**
* @param ImageInterface $image
*/
public function __construct(ImageInterface $image)
{
$this->image = $image->getImage();
// init max limit
$imgSize = $image->getSize();
$this->xMax = $imgSize['width'];
$this->yMax = $imgSize['height'];
}
/**
* @param ImageInterface $image
* @param string $randSeed
*/
public function __construct(ImageInterface $image, $randSeed)
{
$this->image = $image->getImage();
$this->randSeed = $randSeed;
$this->imgSize = $image->getSize();
$this->setMaxLimit();
$this->setCoordinates();
// init rand
$this->initRand();
}
/**
* Decode item
*
* @param \Iterator $coverTextIterator
* @param ImageInterface $stegoText
* @return string
*/
protected function decodeItem(\Iterator $coverTextIterator, ImageInterface $stegoText)
{
$pixelData = $coverTextIterator->current();
$colorRgb = $stegoText->getBinaryColor($pixelData['color']);
$channels = $this->getChannels($pixelData['x'], $pixelData['y']);
$result = '';
foreach ($channels as $item) {
$result .= substr($colorRgb[$item], -1, 1);
}
return $result;
}
/**
* {@inheritDoc}
*/
protected function getImageIterator(ImageInterface $image)
{
return $image->getIterator();
}