From bb1ca76bcce6052f732fe117cd854d82479d9b40 Mon Sep 17 00:00:00 2001
From: Andreas Hocevar <andreas.hocevar@gmail.com>
Date: Mon, 16 Mar 2020 23:22:49 +0100
Subject: [PATCH] Make Executor work in workers

---
 src/ol/render/canvas/Executor.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/ol/render/canvas/Executor.js b/src/ol/render/canvas/Executor.js
index ccdf260033..c9217a7ac4 100644
--- a/src/ol/render/canvas/Executor.js
+++ b/src/ol/render/canvas/Executor.js
@@ -18,6 +18,7 @@ import {
 } from '../../transform.js';
 import {defaultTextAlign, measureTextHeight, measureAndCacheTextWidth, measureTextWidths} from '../canvas.js';
 import RBush from 'rbush/rbush.js';
+import {WINDOW} from '../../has.js';
 
 
 /**
@@ -204,7 +205,9 @@ class Executor {
       contextInstructions.push('lineCap', strokeState.lineCap);
       contextInstructions.push('lineJoin', strokeState.lineJoin);
       contextInstructions.push('miterLimit', strokeState.miterLimit);
-      if (CanvasRenderingContext2D.prototype.setLineDash) {
+      // eslint-disable-next-line
+      const Context = WINDOW ? CanvasRenderingContext2D : OffscreenCanvasRenderingContext2D;
+      if (Context.prototype.setLineDash) {
         contextInstructions.push('setLineDash', [strokeState.lineDash]);
         contextInstructions.push('lineDashOffset', strokeState.lineDashOffset);
       }