fixes #1697

docs/files/class-my-theme-kirki.php

@@ -310,7 +310,7 @@ public function get_styles() {
 								$output['property'] = $output['property'] . '-' . $key;
 							}
 							if ( 'background-image' === $output['property'] && false === strpos( $subvalue, 'url(' ) ) {
-								$subvalue = 'url("' . $subvalue . '")';
+								$subvalue = 'url("' . set_url_scheme( $subvalue ) . '")';
 							}
 							if ( $subvalue ) {
 								$css[ $output['media_query'] ][ $output['element'] ][ $property ] = $subvalue;
@@ -342,6 +342,7 @@ public function get_styles() {
 					// Make sure background-images are properly formatted.
 					if ( 'background-image' === $property ) {
 						if ( false === strrpos( $value, 'url(' ) ) {
+							$value = set_url_scheme( $value );
 							$value = 'url("' . esc_url_raw( $value ) . '")';
 						}
 					} else {

modules/css/property/class-kirki-output-property-background-image.php

@@ -31,9 +31,9 @@ protected function process_value() {
 			}
 
 			if ( preg_match( '/^\d+$/', $this->value ) ) {
-				$this->value = 'url("' . wp_get_attachment_url( $this->value ) . '")';
+				$this->value = 'url("' . set_url_scheme( wp_get_attachment_url( $this->value ) ) . '")';
 			} else {
-				$this->value = 'url("' . $this->value . '")';
+				$this->value = 'url("' . set_url_scheme( $this->value ) . '")';
 			}
 		}
 	}

readme.txt

@@ -35,7 +35,8 @@ If you want to integrate Kirki in your theme or plugin, please read the instruct
 
 = 3.0.20 =
 
-* Fix: Use `repeat` instead of `repeat-all` in background controls.
+* Fix: Use `repeat` instead of `repeat-all` in background controls [#1701](https://github.com/aristath/kirki/issues/1701)
+* Fix: Use `set_url_scheme()` when outputing images [#1697](https://github.com/aristath/kirki/issues/1697)
 
 = 3.0.19 =