From 0807b44722b2566b0bd1c2b399708be536e27ee2 Mon Sep 17 00:00:00 2001
From: mike-000 <49240900+mike-000@users.noreply.github.com>
Date: Tue, 1 Sep 2020 09:27:17 +0100
Subject: [PATCH 1/2] Clear this.canvas_ whenever render() is called

---
 src/ol/style/RegularShape.js | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/ol/style/RegularShape.js b/src/ol/style/RegularShape.js
index b0b72005db..dfc480bc32 100644
--- a/src/ol/style/RegularShape.js
+++ b/src/ol/style/RegularShape.js
@@ -404,6 +404,7 @@ class RegularShape extends ImageStyle {
 
     this.draw_(renderOptions, context, 0, 0, 1);
 
+    this.canvas_ = {};
     this.canvas_[1] = context.canvas;
 
     // canvas.width and height are rounded to the closest integer

From 6cc063241a40dc04226e95a62523728a379ea58f Mon Sep 17 00:00:00 2001
From: mike-000 <49240900+mike-000@users.noreply.github.com>
Date: Tue, 1 Sep 2020 09:29:42 +0100
Subject: [PATCH 2/2] Use pixelRatio 2

---
 rendering/cases/circle-style/main.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/rendering/cases/circle-style/main.js b/rendering/cases/circle-style/main.js
index d3e54dce06..89b919859d 100644
--- a/rendering/cases/circle-style/main.js
+++ b/rendering/cases/circle-style/main.js
@@ -52,7 +52,7 @@ const style = new Style({
 });
 
 new Map({
-  pixelRatio: 1,
+  pixelRatio: 2,
   layers: [
     new VectorLayer({
       source: vectorSource,