code: function scaleCanvas(scaleX, scaleY) {
           var w = this.canvas.width * scaleX;
           var h = this.canvas.height * scaleY; // adjust CSS style for High-DPI devices
  
           if (me.device.devicePixelRatio > 1) {
             this.canvas.style.width = w / me.device.devicePixelRatio + "px";
             this.canvas.style.height = h / me.device.devicePixelRatio + "px";
           } else {
             this.canvas.style.width = w + "px";
             this.canvas.style.height = h + "px";
           }
  
           this.compositor.setProjection(this.canvas.width, this.canvas.height);
         }
docs: scales the canvas & GL Context
  @name scaleCanvas
  @memberOf me.WebGLRenderer.prototype
  @function