From 8e06e5eb39107195378a3f028dc5d0a9f9fb245d Mon Sep 17 00:00:00 2001
From: Zsolt Ero <zsolt.ero@gmail.com>
Date: Fri, 16 Feb 2018 21:09:56 +0100
Subject: [PATCH] fixed IIIF options.maxLevel

---
 src/iiiftilesource.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/iiiftilesource.js b/src/iiiftilesource.js
index 0af45c8b..c80a3f2d 100644
--- a/src/iiiftilesource.js
+++ b/src/iiiftilesource.js
@@ -127,7 +127,8 @@ $.IIIFTileSource = function( options ){
         if (!this.scale_factors) {
             options.maxLevel = Number(Math.ceil(Math.log(Math.max(this.width, this.height), 2)));
         } else {
-            options.maxLevel = Math.floor(Math.pow(Math.max.apply(null, this.scale_factors), 0.5));
+            var maxScaleFactor = Math.max.apply(null, this.scale_factors);
+            options.maxLevel = Math.round(Math.log(maxScaleFactor) * Math.LOG2E);
         }
     }