[openlayers] Add hidpi option and test for ImageArcGISRest source (#25348)

* Add hidpi option to ImageArcGISRestOptions

* Add tests for the ImageArcGISRest source

types/openlayers/index.d.ts

@@ -8,6 +8,7 @@
 //                 Dan Manastireanu <https://github.com/danmana>
 //                 Yair Tawil <https://github.com/yairtawil>
 //                 Pierre Marchand <https://github.com/pierremarc>
+//                 Hauke Stieler <https://github.com/hauke96>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // Definitions partially generated using tsd-jsdoc (https://github.com/englercj/tsd-jsdoc)
 
@@ -12087,6 +12088,7 @@ export namespace olx {
         interface ImageArcGISRestOptions {
             attributions?: ol.Attribution[];
             crossOrigin?: (string);
+            hidpi?: boolean;
             logo?: (string | LogoOptions);
             imageLoadFunction?: ol.ImageLoadFunctionType;
             params?: { [k: string]: any };

types/openlayers/openlayers-tests.ts

@@ -718,6 +718,23 @@ const wmts: ol.source.WMTS = new ol.source.WMTS({
     wrapX: true,
 });
 
+//
+// ol.source.ImageArcGISRest
+//
+const arcGISImageLoadFunction: ol.ImageLoadFunctionType = (image, url) => {};
+const imageArcGISRest: ol.source.ImageArcGISRest = new ol.source.ImageArcGISRest({
+    attributions: [attribution],
+    crossOrigin: stringValue,
+    hidpi: booleanValue,
+    logo: logoOptions,
+    imageLoadFunction: arcGISImageLoadFunction,
+    params: {},
+    projection: projectionLike,
+    ratio: numberValue,
+    resolutions: [numberValue, numberValue, numberValue, numberValue, numberValue],
+    url: stringValue
+});
+
 //
 // ol.coordinate
 //