assign tile source context options to context

src/ol/renderer/canvas/TileLayer.js

@@ -9,6 +9,7 @@ import {createEmpty, equals, getIntersection, getTopLeft} from '../../extent.js'
 import CanvasLayerRenderer from './Layer.js';
 import {apply as applyTransform, compose as composeTransform, makeInverse} from '../../transform.js';
 import {numberSafeCompareFunction} from '../../array.js';
+import {assign} from '../../obj.js';
 
 /**
  * @classdesc
@@ -270,6 +271,7 @@ class CanvasTileLayerRenderer extends CanvasLayerRenderer {
       this.clipUnrotated(context, frameState, layerExtent);
     }
 
+    assign(context, tileSource.getContextOptions());
     this.preRender(context, frameState);
 
     this.renderedTiles.length = 0;