Surface display width and height in stage context

Author: jesstelford

src/components/stage.js

@@ -21,6 +21,8 @@ export default class Stage extends Component {
   static childContextTypes = {
     loop: PropTypes.object,
     scale: PropTypes.number,
+    renderWidth: PropTypes.number,
+    renderHeight: PropTypes.number,
   };
 
   setDimensions = () => {
@@ -52,8 +54,11 @@ export default class Stage extends Component {
   }
 
   getChildContext() {
+    const { scale, width, height } = this.getScale();
     return {
-      scale: this.getScale().scale,
+      scale: scale,
+      renderWidth: width,
+      renderHeight: height,
       loop: this.context.loop,
     };
   }