public function crop( $args = array() ) {
		$wp_error = new WP_Error();

		$r = bp_parse_args( $args, array(
			'original_file' => '',
			'crop_x'        => 0,
			'crop_y'        => 0,
			'crop_w'        => 0,
			'crop_h'        => 0,
			'dst_w'         => 0,
			'dst_h'         => 0,
			'src_abs'       => false,
			'dst_file'      => false,
		), 'bp_attachment_crop_args' );

		if ( empty( $r['original_file'] ) || ! file_exists( $r['original_file'] ) ) {
			$wp_error->add( 'crop_error', __( 'Cropping the file failed: missing source file.', 'buddypress' ) );
			return $wp_error;
		}

		// Check image file pathes.
		$path_error = __( 'Cropping the file failed: the file path is not allowed.', 'buddypress' );

		// Make sure it's coming from an uploaded file.
		if ( false === strpos( $r['original_file'], $this->upload_path ) ) {
			$wp_error->add( 'crop_error', $path_error );
			return $wp_error;
		}

		/**
		 * If no destination file is provided, WordPress will use a default name
		 * and will write the file in the source file's folder.
		 * If a destination file is provided, we need to make sure it's going into uploads.
		 */
		if ( ! empty( $r['dst_file'] ) && false === strpos( $r['dst_file'], $this->upload_path ) ) {
			$wp_error->add( 'crop_error', $path_error );
			return $wp_error;
		}

		// Check image file types.
		$check_types = array( 'src_file' => array( 'file' => $r['original_file'], 'error' => _x( 'source file', 'Attachment source file', 'buddypress' ) ) );
		if ( ! empty( $r['dst_file'] ) ) {
			$check_types['dst_file'] = array( 'file' => $r['dst_file'], 'error' => _x( 'destination file', 'Attachment destination file', 'buddypress' ) );
		}

		/**
		 * WordPress image supported types.
		 * @see wp_attachment_is()
		 */
		$supported_image_types = array(
			'jpg'  => 1,
			'jpeg' => 1,
			'jpe'  => 1,
			'gif'  => 1,
			'png'  => 1,
		);

		foreach ( $check_types as $file ) {
			$is_image      = wp_check_filetype( $file['file'] );
			$ext           = $is_image['ext'];

			if ( empty( $ext ) || empty( $supported_image_types[ $ext ] ) ) {
				$wp_error->add( 'crop_error', sprintf( __( 'Cropping the file failed: %s is not a supported image file.', 'buddypress' ), $file['error'] ) );
				return $wp_error;
			}
		}

		// Add the image.php to the required WordPress files, if it's not already the case.
		$required_files = array_flip( $this->required_wp_files );
		if ( ! isset( $required_files['image'] ) ) {
			$this->required_wp_files[] = 'image';
		}

		// Load the files.
		$this->includes();

		// Finally crop the image.
		return wp_crop_image( $r['original_file'], (int) $r['crop_x'], (int) $r['crop_y'], (int) $r['crop_w'], (int) $r['crop_h'], (int) $r['dst_w'], (int) $r['dst_h'], $r['src_abs'], $r['dst_file'] );
	}