+ m_frame_begin_time = SDL_GetPerformanceCounter();
+ if (m_last_frame_gpu_timer)
+ glDeleteQueries(1, &m_last_frame_gpu_timer);
+ m_last_frame_gpu_timer = m_frame_gpu_timer;
+ glGenQueries(1, &m_frame_gpu_timer);
+ glBeginQuery(GL_TIME_ELAPSED, m_frame_gpu_timer);
+}
+
+double Screen::GetLastFrameTimeGPU() const
+{
+ if (!m_last_frame_gpu_timer)
+ return 0;
+ uint64_t frame_time_ns;
+ glGetQueryObjectui64v(m_last_frame_gpu_timer, GL_QUERY_RESULT, &frame_time_ns);
+ return frame_time_ns/1000000000.0;