Stats panel: display the size of the viewport

src/core/session.ts

 
                 // update internals
                 this._renderStats.update();
-                this._statsPanel.update(time, this._trackers, this._sources, this._updateStats.cyclesPerSecond, this._renderStats.cyclesPerSecond);
+                this._statsPanel.update(time, this._sources, this._trackers, this._viewport, this._updateStats.cyclesPerSecond, this._renderStats.cyclesPerSecond);
                 this._frameReady = false;
 
             }

src/ui/stats-panel.ts

     /**
      * A method to be called in the update loop
      * @param time current time in ms
-     * @param trackers the trackers attached to the session
      * @param sources the sources of media linked to the session
+     * @param trackers the trackers attached to the session
+     * @param viewport the viewport
      * @param gpu GPU cycles per second
      * @param fps frames per second
      */
-    update(time: DOMHighResTimeStamp, trackers: Tracker[], sources: Source[], gpu: number, fps: number): void
+    update(time: DOMHighResTimeStamp, sources: Source[], trackers: Tracker[], viewport: Viewport, gpu: number, fps: number): void
     {
         if(time >= this._lastUpdate + UPDATE_INTERVAL) {
             this._lastUpdate = time;
-            this._update(trackers, sources, fps, gpu);
+            this._update(sources, trackers, viewport, fps, gpu);
         }
     }
 
 
     /**
      * Update the contents of the panel
-     * @param trackers the trackers attached to the session
      * @param sources the sources of media linked to the session
+     * @param trackers the trackers attached to the session
+     * @param viewport the viewport
      * @param fps frames per second
      * @param gpu GPU cycles per second
      */
-    private _update(trackers: Tracker[], sources: Source[], fps: number, gpu: number): void
+    private _update(sources: Source[], trackers: Tracker[], viewport: Viewport, fps: number, gpu: number): void
     {
         // all sanitized
         const lfps = this._label('_ar_fps');
             const trackerStats = trackers.map(tracker => tracker._stats).join(', ');
             lout.innerText = trackerStats;
         }
+
+        const ldraw = this._label('_ar_draw');
+        if(ldraw !== null) {
+            const size = viewport.virtualSize;
+            ldraw.innerText = `${size.width}x${size.height} viewport`;
+        }
     }
 
     /**
         print('<br>');
         print('OUT: <span class="_ar_out"></span>');
 
+        print('<br>');
+        print('DRAW: <span class="_ar_draw"></span>');
+
         return content;
     }
 }