From 5b1df4438d89c18d162d775f0fdca91f6c782043 Mon Sep 17 00:00:00 2001
From: mike-000 <49240900+mike-000@users.noreply.github.com>
Date: Wed, 1 Jan 2020 22:04:10 +0000
Subject: [PATCH] Fix for undefined source in Image layer

Prevent error if layer does not have a source.  Also clear any existing image if source is set to null or undefined by setSource.
---
 src/ol/renderer/canvas/ImageLayer.js | 22 +++++++++++++---------
 1 file changed, 13 insertions(+), 9 deletions(-)

diff --git a/src/ol/renderer/canvas/ImageLayer.js b/src/ol/renderer/canvas/ImageLayer.js
index 5dc9895cd0..7403890219 100644
--- a/src/ol/renderer/canvas/ImageLayer.js
+++ b/src/ol/renderer/canvas/ImageLayer.js
@@ -55,16 +55,20 @@ class CanvasImageLayerRenderer extends CanvasLayerRenderer {
     }
 
     if (!hints[ViewHint.ANIMATING] && !hints[ViewHint.INTERACTING] && !isEmpty(renderedExtent)) {
-      let projection = viewState.projection;
-      if (!ENABLE_RASTER_REPROJECTION) {
-        const sourceProjection = imageSource.getProjection();
-        if (sourceProjection) {
-          projection = sourceProjection;
+      if (imageSource) {
+        let projection = viewState.projection;
+        if (!ENABLE_RASTER_REPROJECTION) {
+          const sourceProjection = imageSource.getProjection();
+          if (sourceProjection) {
+            projection = sourceProjection;
+          }
         }
-      }
-      const image = imageSource.getImage(renderedExtent, viewResolution, pixelRatio, projection);
-      if (image && this.loadImage(image)) {
-        this.image_ = image;
+        const image = imageSource.getImage(renderedExtent, viewResolution, pixelRatio, projection);
+        if (image && this.loadImage(image)) {
+          this.image_ = image;
+        }
+      } else {
+        this.image_ = null;
       }
     }