Reenable ability to change exposure/lwhite.

src/graphics/shaders.cpp

@@ -2091,8 +2091,8 @@ namespace FullScreenShader
     {
         glUniform1i(uniform_tex, TU_tex);
         glUniform1i(uniform_logluminancetex, TU_loglum);
-//        glUniform1f(uniform_exposure, exposure);
+        glUniform1f(uniform_exposure, exposure);
-//        glUniform1f(uniform_lwhite, Lwhite);
+        glUniform1f(uniform_lwhite, Lwhite);
     }
 
     GLuint DepthOfFieldShader::Program;

src/states_screens/dialogs/debug_slider.cpp

@@ -48,6 +48,14 @@ DebugSliderDialog::DebugSliderDialog(std::string id, irr::core::stringw msg) :
 
     LabelWidget* message = getWidget<LabelWidget>("title");
     message->setText( msg.c_str(), false );
+
+    float val;
+    if (m_id == "lwhite")
+      val = irr_driver->getLwhite() * 10.;
+    if (m_id == "exposure")
+      val = irr_driver->getExposure() * 100.;
+
+    getWidget<SpinnerWidget>("value_slider")->setValue(val);
 }
 
 // ------------------------------------------------------------------------------------------------------

src/tracks/track.cpp

@@ -356,6 +356,8 @@ void Track::cleanup()
 //-----------------------------------------------------------------------------
 void Track::loadTrackInfo()
 {
+    irr_driver->setLwhite(1.);
+    irr_driver->setExposure(0.09);
     // Default values
     m_use_fog               = false;
     m_fog_max               = 1.0f;