From 39835006016dad99d59defbcdd447444b6378a76 Mon Sep 17 00:00:00 2001
From: Tapio Koskinen <tapio.koskinen@insta.fi>
Date: Mon, 19 Oct 2020 13:57:30 +0300
Subject: [PATCH] Don't try to get image data for zero sized images

Otherwise "context.getImageData(0, 0, width, height)" throws an exception.
---
 src/ol/source/Raster.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/ol/source/Raster.js b/src/ol/source/Raster.js
index 9ca0d9e7ba..8f6ea35d7f 100644
--- a/src/ol/source/Raster.js
+++ b/src/ol/source/Raster.js
@@ -832,6 +832,9 @@ function getImageData(layer, frameState) {
   }
   const width = frameState.size[0];
   const height = frameState.size[1];
+  if (width === 0 || height === 0) {
+    return null;
+  }
   const container = renderer.renderFrame(frameState, null);
   let element;
   if (container) {