From 0ad8fff35db87c360b7ad159e5e1a4ad08bed84a Mon Sep 17 00:00:00 2001
From: Anders Kaseorg <anders@zulip.com>
Date: Tue, 26 May 2020 15:44:47 -0700
Subject: [PATCH] lightbox_canvas: Clear canvas with less obfuscation.

Signed-off-by: Anders Kaseorg <anders@zulip.com>
---
 static/js/lightbox_canvas.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/static/js/lightbox_canvas.js b/static/js/lightbox_canvas.js
index a06c61092c..fbee2359f0 100644
--- a/static/js/lightbox_canvas.js
+++ b/static/js/lightbox_canvas.js
@@ -215,7 +215,7 @@ const funcs = {
         const w = canvas.width * meta.zoom;
         const h = canvas.height * meta.zoom;
 
-        canvas.width = canvas.width;
+        context.clearRect(0, 0, canvas.width, canvas.height);
         context.imageSmoothingEnabled = false;
 
         context.drawImage(meta.image, x, y, w, h);