context reinit support

qglview.cpp

@@ -158,10 +158,10 @@ void QGLView::render() {
 	renderer_.mouse_pos = mapFromGlobal(QCursor::pos());
 	renderer_.renderScene();
 	emit glEndPaint();
-	fps_tm += time.elapsed();
-	time.restart();
+	fps_tm = time.elapsed();
 	fps_cnt++;
 	if (fps_tm < 1000.) return;
+	time.restart();
 	fps_ = fps_cnt / fps_tm * 1000.;
 	fps_tm = 0.;
 	fps_cnt = 0;
@@ -183,8 +183,10 @@ void QGLView::initialize() {
 	glCullFace(GL_BACK);
 	renderer_.reloadShaders();
 	renderer_.init(width(), height());
+	scene_->reinitAll();
 	is_init = true;
 	need_init_ = false;
+	prev_size = QSize();
 	emit glInitializeDone();
 }