From db86ae28c8d92c471035f353bfc6cbd6cd8eb968 Mon Sep 17 00:00:00 2001
From: Elie Roux <elie.roux@telecom-bretagne.eu>
Date: Tue, 19 Mar 2019 18:22:09 +0100
Subject: [PATCH] address PR comments

---
 src/iiiftilesource.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/iiiftilesource.js b/src/iiiftilesource.js
index f7054643..8c6c11a6 100644
--- a/src/iiiftilesource.js
+++ b/src/iiiftilesource.js
@@ -42,6 +42,8 @@
  * @memberof OpenSeadragon
  * @extends OpenSeadragon.TileSource
  * @see http://iiif.io/api/image/
+ * @param {String} [options.tileFormat]
+ *      The extension that will be used when requiring tiles (defaults to "jpg").
  */
 $.IIIFTileSource = function( options ){
 
@@ -55,7 +57,7 @@ $.IIIFTileSource = function( options ){
 
     options.tileSizePerScaleFactor = {};
 
-    this.tileFormat = "jpg";
+    this.tileFormat = this.tileFormat || 'jpg';
 
     // N.B. 2.0 renamed scale_factors to scaleFactors
     if ( this.tile_width && this.tile_height ) {