适配css样式

src/2d/display/Stage.ts

@@ -559,7 +559,7 @@ export class Stage extends Container {
 	 * @return {{w: number, h: number}}
 	 */
 	public getRootDivWH(div: HTMLDivElement) {
-		let sw = div.style.width;
+		/*let sw = div.style.width;
 		let sh = div.style.height;
 		let iw = document.body.clientWidth;
 		// let ih = document.body.clientHeight-40;
@@ -580,7 +580,11 @@ export class Stage extends Container {
 				vH *= ih / 100;
 			}
 		}
-		return {w: vW, h: vH};
+		return {w: vW, h: vH};*/
+		let divBound = div.getBoundingClientRect();
+		let w = divBound.width;
+		let h = divBound.height;
+		return {w, h};
 	}
 
 	/**