diff --git a/src/tiledimage.js b/src/tiledimage.js
index 74ffacef..ccc51601 100644
--- a/src/tiledimage.js
+++ b/src/tiledimage.js
@@ -1018,7 +1018,7 @@ $.extend($.TiledImage.prototype, $.EventSource.prototype, /** @lends OpenSeadrag
         );
         var currentZeroRatio = this.viewport.deltaPixelsFromPointsNoRotate(
             this.source.getPixelRatio(0), true).x *
-            this._scaleSpring.current.value;
+            this._scaleSpring.current.value * $.pixelDensityRatio;
         var highestLevel = Math.min(
             Math.abs(this.source.maxLevel),
             Math.abs(Math.floor(
@@ -1082,7 +1082,7 @@ $.extend($.TiledImage.prototype, $.EventSource.prototype, /** @lends OpenSeadrag
             var currentRenderPixelRatio = viewport.deltaPixelsFromPointsNoRotate(
                 this.source.getPixelRatio(level),
                 true
-            ).x * this._scaleSpring.current.value;
+            ).x * this._scaleSpring.current.value * $.pixelDensityRatio;
 
             if (level === lowestLevel ||
                 (!haveDrawn && currentRenderPixelRatio >= this.minPixelRatio)) {
diff --git a/src/viewer.js b/src/viewer.js
index b5b24318..ff958e06 100644
--- a/src/viewer.js
+++ b/src/viewer.js
@@ -401,6 +401,13 @@ $.Viewer = function( options ) {
         debugGridColor:     this.debugGridColor
     });
 
+    function resize() {
+      console.log("Windows is resized...");
+      _this.world.resetItems();
+      _this.forceRedraw();
+    }
+    $.addEvent( window, 'resize', resize );
+
     // Overlay container
     this.overlaysContainer    = $.makeNeutralElement( "div" );
     this.canvas.appendChild( this.overlaysContainer );