Add a performance counter for GUI

src/graphics/irr_driver.hpp

@@ -125,6 +125,7 @@ enum QueryPerf
     Q_BLOOM,
     Q_TONEMAP,
     Q_MOTIONBLUR,
+    Q_GUI,
     Q_LAST
 };
 

src/graphics/render.cpp

@@ -235,10 +235,13 @@ void IrrDriver::renderGLSL(float dt)
         PROFILER_POP_CPU_MARKER();
     }  // for i<getNumKarts
 
+    {
+        ScopedGPUTimer Timer(getGPUTimer(Q_GUI));
         PROFILER_PUSH_CPU_MARKER("GUIEngine", 0x75, 0x75, 0x75);
         // Either render the gui, or the global elements of the race gui.
         GUIEngine::render(dt);
         PROFILER_POP_CPU_MARKER();
+    }
 
     // Render the profiler
     if(UserConfigParams::m_profiler_enabled)

src/utils/profiler.cpp

@@ -407,7 +407,8 @@ void Profiler::draw()
                 "Godrays",
                 "Bloom",
                 "Tonemap",
-                "Motion Blur"
+                "Motion Blur",
+                "GUI",
             };
             std::ostringstream oss;
             oss << Phase[hovered_gpu_marker] << " : " << hovered_gpu_marker_elapsed << " us";