Add back support for scale parameter and make default scale 1

Author: altert

openseadragon-fabricjs-overlay.js

@@ -28,7 +28,7 @@
             this._fabricjsOverlayInfo._scale = options.scale; // arbitrary scale for created fabric canvas
         }
         else {
-            this._fabricjsOverlayInfo._scale = 1000;
+            this._fabricjsOverlayInfo._scale = 1;
         }
 
         return this._fabricjsOverlayInfo;
@@ -178,9 +178,8 @@
             let viewportZoom = this._viewer.viewport.getZoom(true);
             this._fabricCanvas.setWidth(this._containerWidth);
             this._fabricCanvas.setHeight(this._containerHeight);
-            // let zoom = this._viewer.viewport._containerInnerSize.x * viewportZoom / this._scale;
-            // this._fabricCanvas.setZoom(zoom);
-            this._fabricCanvas.setZoom(viewportZoom);
+            let zoom = this._viewer.viewport._containerInnerSize.x * viewportZoom / this._scale;
+            this._fabricCanvas.setZoom(zoom);
             let viewportWindowPoint = this._viewer.viewport.viewportToWindowCoordinates(origin);
             let x = Math.round(viewportWindowPoint.x);
             let y = Math.round(viewportWindowPoint.y);