From e2bbefdc245dcffd050c9419b7688a2a99a6e24c Mon Sep 17 00:00:00 2001
From: "J.W. Jagersma" <jwjagersma@gmail.com>
Date: Tue, 29 Sep 2020 21:56:02 +0200
Subject: [PATCH] clamp waterfall canvas width to 100% for fft_size <
 canvas_max_midth

---
 htdocs/openwebrx.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/htdocs/openwebrx.js b/htdocs/openwebrx.js
index e48dfe55c..b2a746912 100644
--- a/htdocs/openwebrx.js
+++ b/htdocs/openwebrx.js
@@ -1245,7 +1245,7 @@ var canvas_actual_line;
 
 function add_canvas() {
     canvas_subcontainer = document.createElement("div");
-    var n = fft_size / canvas_max_width;
+    var n = Math.max(fft_size / canvas_max_width, 1);
     var w = 100 / n;
     for (var i = 0; i < n; ++i) {
         var new_canvas = document.createElement("canvas");