/**
* Resize image and save to target file
*
* @param null|int|string $width NULL: original width; integer: width in pixel; string: others specific (50%)
* @param null|int|string $height NULL: calculating by ratio; integer: height in pixel; string: others specific (50%)
* @param null|int $quality
* @return \Imager\ImageInfo
* @throws \Imager\InvalidArgumentException
* @throws \Imager\InvalidStateException
*/
public function resize($width = null, $height = null, $quality = null)
{
// if $width and $height dot defined, than set $width to zero (generate origin size)
$helpWidth = !isset($width) && !isset($height) ? 0 : $width;
$this->checkDimension($helpWidth, 'width');
$this->checkDimension($height, 'height');
$this->checkQuality($quality);
$generateWith = $helpWidth === 0 ? $this->image->getWidth() . '!' : $width;
$generateHeight = $height === 0 ? $this->image->getHeight() . '!' : $height;
$generateQuality = $quality ?: 0;
$source = $this->image->getPathname();
$options = $this->getCommandOptions($generateWith, $generateHeight, $generateQuality);
$target = $this->createTempFile();
$command = sprintf('convert %s %s %s', $source, $options, $target);
$this->run($command);
$img = new ImageInfo($target, $this->image);
$img->setParameter('id', $this->image->getFilename())->setParameter('width', $width)->setParameter('height', $height)->setParameter('quality', $quality);
return $img;
}
