fix picker which crashed on resolution change, timelapse frame only when draw a stroke

engine/app.cpp

@@ -302,7 +302,7 @@ void App::update(float dt)
     //glViewport(0, 0, (GLsizei)width, (GLsizei)height);
     //glClear(GL_COLOR_BUFFER_BIT);
 
-    if (!canvas->m_mouse_captured) 
+    //if (!canvas->m_mouse_captured)
     {
 #if _WIN32 || __OSX__
         layout.reload();
@@ -349,8 +349,10 @@ void App::update(float dt)
     if (rec_running)
     {
         rec_timer += dt;
-        if (rec_timer > 1.f)
+        if (rec_timer > 1.f && canvas->m_canvas->m_dirty_stroke)
         {
+            canvas->m_canvas->m_dirty_stroke = false;
+            
             LOG("rec tick");
             rec_timer = 0.f;
             
@@ -682,6 +684,7 @@ void App::rec_loop()
                 else
                 {
                     rec_count++;
+                    redraw = true;
                 }
             }
             rec_frames.pop_front();