protected function Autorotate::process in Imagick 8

File

src/Plugin/ImageToolkit/Operation/imagick/Autorotate.php, line 31

Class

Autorotate

Defines imagick autorotate operation.

Namespace

Drupal\imagick\Plugin\ImageToolkit\Operation\imagick

Code

protected function process(Imagick $resource, array $arguments) {
  $orientation = $resource
    ->getImageOrientation();

  // See https://stackoverflow.com/a/40055711/8048794
  // First rotate to correct position
  switch ($orientation) {
    case Imagick::ORIENTATION_BOTTOMRIGHT:
    case Imagick::ORIENTATION_BOTTOMLEFT:
      $resource
        ->rotateimage(new ImagickPixel(), 180);

      // rotate 180 degrees
      break;
    case Imagick::ORIENTATION_RIGHTTOP:
    case Imagick::ORIENTATION_LEFTTOP:
      $resource
        ->rotateimage(new ImagickPixel(), 90);

      // rotate 90 degrees CW
      break;
    case Imagick::ORIENTATION_LEFTBOTTOM:
    case Imagick::ORIENTATION_RIGHTBOTTOM:
      $resource
        ->rotateimage(new ImagickPixel(), -90);

      // rotate 90 degrees CCW
      break;
  }

  // Flop image if required
  if (in_array($orientation, [
    Imagick::ORIENTATION_TOPRIGHT,
    Imagick::ORIENTATION_BOTTOMLEFT,
    Imagick::ORIENTATION_LEFTTOP,
    Imagick::ORIENTATION_RIGHTBOTTOM,
  ])) {
    $resource
      ->flopImage();
  }

  // Now that it's auto-rotated, make sure the EXIF data is correct in case the EXIF gets saved with the image!
  return $resource
    ->setImageOrientation(Imagick::ORIENTATION_TOPLEFT);
}