updates in drawers and tiled image

src/canvasdrawer.js

@@ -46,9 +46,8 @@
  */
 
 class CanvasDrawer extends $.DrawerBase{
-    constructor(){
+    constructor(options){
-        // pass through ...arguments to DrawerBase to support positional arguments (legacy, not preferred)
+        super(options);
-        super(...arguments);
 
         /**
          * 2d drawing context for {@link OpenSeadragon.CanvasDrawer#canvas}.

src/drawerbase.js

@@ -47,26 +47,9 @@
 $.DrawerBase = class DrawerBase{
     constructor(options){
         $.console.assert( options.viewer, "[Drawer] options.viewer is required" );
-
-        //backward compatibility for positional args while preferring more
-        //idiomatic javascript options object as the only argument
-        var args  = arguments;
-
-        if( !$.isPlainObject( options ) ){
-            options = {
-                source:     args[ 0 ], // Reference to Viewer tile source.
-                viewport:   args[ 1 ], // Reference to Viewer viewport.
-                element:    args[ 2 ]  // Parent element.
-            };
-        }
-
         $.console.assert( options.viewport, "[Drawer] options.viewport is required" );
         $.console.assert( options.element, "[Drawer] options.element is required" );
 
-        if ( options.source ) {
-            $.console.error( "[Drawer] options.source is no longer accepted; use TiledImage instead" );
-        }
-
         this.viewer = options.viewer;
         this.viewport = options.viewport;
         this.debugGridColor = typeof options.debugGridColor === 'string' ? [options.debugGridColor] : options.debugGridColor || $.DEFAULT_SETTINGS.debugGridColor;
@@ -86,6 +69,7 @@ $.DrawerBase = class DrawerBase{
         this.canvas.style.width     = "100%";
         this.canvas.style.height    = "100%";
         this.canvas.style.position  = "absolute";
+        // set canvas.style.left = 0 so the canvas is positioned properly in ltr and rtl html
         this.canvas.style.left = "0";
         $.setElementOpacity( this.canvas, this.viewer.opacity, true );
 

src/htmldrawer.js

@@ -46,17 +46,8 @@
  */
 
 class HTMLDrawer extends $.DrawerBase{
-    constructor(){
+    constructor(options){
-        // pass through ...arguments to DrawerBase to support positional arguments (legacy, not preferred)
+        super(options);
-        super(...arguments);
-
-        /**
-         * 2d drawing context for {@link OpenSeadragon.Drawer#canvas} if it's a <canvas> element, otherwise null.
-         * @member {Object} context
-         * @memberof OpenSeadragon.Drawer#
-         */
-        this.context = null;
-
     }
 
     /**

src/tiledimage.js

@@ -1710,9 +1710,7 @@ $.extend($.TiledImage.prototype, $.EventSource.prototype, /** @lends OpenSeadrag
             x, y,
             level,
             currentTime,
-            numberOfTiles,
+            numberOfTiles
-            this._worldWidthCurrent,
-            this._worldHeightCurrent
             ),
             drawTile = drawLevel;