WP_Image_Editor_Imagick::rotate( float $angle )

	public function rotate( $angle ) {
		/**
		 * $angle is 360-$angle because Imagick rotates clockwise
		 * (GD rotates counter-clockwise)
		 */
		try {
			$this->image->rotateImage( new ImagickPixel('none'), 360-$angle );

			// Normalise Exif orientation data so that display is consistent across devices.
			if ( is_callable( array( $this->image, 'setImageOrientation' ) ) && defined( 'Imagick::ORIENTATION_TOPLEFT' ) ) {
				$this->image->setImageOrientation( Imagick::ORIENTATION_TOPLEFT );
			}

			// Since this changes the dimensions of the image, update the size.
			$result = $this->update_size();
			if ( is_wp_error( $result ) )
				return $result;

			$this->image->setImagePage( $this->size['width'], $this->size['height'], 0, 0 );
		}
		catch ( Exception $e ) {
			return new WP_Error( 'image_rotate_error', $e->getMessage() );
		}
		return true;
	}