public function get_background_image() {

		$id     = $this->get( 'id' );
		$img_id = get_post_thumbnail_id( $id );

		$size = 'full';
		if ( 1 === $this->get_template_version() ) {
			$size = llms_parse_bool( get_option( 'lifterlms_certificate_legacy_image_size', 'yes' ) ) ? 'full' : 'lifterlms_certificate_background';
		}

		if ( ! $img_id ) {

			// Get the source.
			$src = llms()->certificates()->get_default_image( $id );

			// Denote it's the default image in the return.
			$is_default = true;

			/**
			 * Filters the display height of the default certificate background image.
			 *
			 * This filter is used by legacy certificates only. If the certificate is utilizing
			 * the block editor the filtered value does not affect the size of the background image as
			 * the image is always set to fill the width and height of the certificate itself.
			 *
			 * @since 2.2.0
			 *
			 * @param int $height         Display height of the image, in pixels.
			 * @param int $certificate_id WP_Post ID of the awarded certificate.
			 */
			$height = apply_filters( 'lifterlms_certificate_background_image_placeholder_height', 616, $id );

			/**
			 * Filters the display width of the default certificate background image.
			 *
			 * This filter is used by legacy certificates only. If the certificate is utilizing
			 * the block editor the filtered value does not affect the size of the background image as
			 * the image is always set to fill the width and height of the certificate itself.
			 *
			 * @since 2.2.0
			 *
			 * @param int $width          Display width of the image, in pixels.
			 * @param int $certificate_id WP_Post ID of the awarded certificate.
			 */
			$width = apply_filters( 'lifterlms_certificate_background_image_placeholder_width', 800, $id );

		} else {

			list( $src, $width, $height ) = wp_get_attachment_image_src( $img_id, $size );

			// Denote it's not the default image in the return.
			$is_default = false;

			/**
			 * Filters the image source of the certificate background image.
			 *
			 * @since 2.2.0
			 *
			 * @param string $src            The image source url.
			 * @param int    $certificate_id WP_Post ID of the awarded certificate.
			 */
			$src = apply_filters( 'lifterlms_certificate_background_image_src', $src, $id );

			/**
			 * Filters the display height of the certificate background image.
			 *
			 * This filter is used by legacy certificates only. If the certificate is utilizing
			 * the block editor the filtered value does not affect the size of the background image as
			 * the image is always set to fill the width and height of the certificate itself.
			 *
			 * @since 2.2.0
			 *
			 * @param int $height         Display height of the image, in pixels.
			 * @param int $certificate_id WP_Post ID of the awarded certificate.
			 */
			$height = apply_filters( 'lifterlms_certificate_background_image_height', $height, $id );

			/**
			 * Filters the display width of the certificate background image.
			 *
			 * This filter is used by legacy certificates only. If the certificate is utilizing
			 * the block editor the filtered value does not affect the size of the background image as
			 * the image is always set to fill the width and height of the certificate itself.
			 *
			 * @since 2.2.0
			 *
			 * @param int $width          Display width of the image, in pixels.
			 * @param int $certificate_id WP_Post ID of the awarded certificate.
			 */
			$width = apply_filters( 'lifterlms_certificate_background_image_width', $width, $id );

		}

		return compact( 'src', 'width', 'height', 'is_default' );

	}