Implement interface to allow disabling IBL

data/gui/custom_video_settings.stkgui

@@ -25,9 +25,20 @@
 
         <div layout="horizontal-row" width="100%" proportion="1">
             <spacer width="70" height="10" />
+            
+            <div layout="horizontal-row" proportion="1" height="fit">
                 <label text="Shadows" I18N="Video settings"/>
                 <spacer width="10" height="10"/>
-            <gauge id="shadows" min_value="0" max_value="2" width="50%"/>
+                <gauge id="shadows" min_value="0" max_value="2" proportion="1"/>
+            </div>
+            
+            <spacer height="4" width="10" />
+            
+            <div layout="horizontal-row" proportion="1" height="fit">
+                <checkbox id="ibl"/>
+                <spacer width="10" height="10"/>
+                <label text="Image-based lighting" I18N="Video settings"/>
+            </div>
         </div>
 
         <spacer height="4" width="10" />

src/states_screens/dialogs/custom_video_settings.cpp

@@ -92,6 +92,7 @@ void CustomVideoSettingsDialog::beforeAddingWidgets()
         shadows->setValue(0);
     getWidget<CheckBoxWidget>("dynamiclight")->setState(UserConfigParams::m_dynamic_lights);
     getWidget<CheckBoxWidget>("lightshaft")->setState(UserConfigParams::m_light_shaft);
+    getWidget<CheckBoxWidget>("ibl")->setState(!UserConfigParams::m_degraded_IBL);
     getWidget<CheckBoxWidget>("global_illumination")->setState(UserConfigParams::m_gi);
     getWidget<CheckBoxWidget>("motionblur")->setState(UserConfigParams::m_motionblur);
     getWidget<CheckBoxWidget>("mlaa")->setState(UserConfigParams::m_mlaa);
@@ -150,6 +151,9 @@ GUIEngine::EventPropagation CustomVideoSettingsDialog::processEvent(const std::s
         UserConfigParams::m_light_shaft =
             advanced_pipeline && getWidget<CheckBoxWidget>("lightshaft")->getState();
 
+        UserConfigParams::m_degraded_IBL =
+            !getWidget<CheckBoxWidget>("ibl")->getState();
+
         UserConfigParams::m_gi =
             advanced_pipeline && CVS->supportsGlobalIllumination() &&
             getWidget<CheckBoxWidget>("global_illumination")->getState();
@@ -231,6 +235,7 @@ void CustomVideoSettingsDialog::updateActivation()
         getWidget<CheckBoxWidget>("mlaa")->setActivated();
         getWidget<CheckBoxWidget>("ssao")->setActivated();
         getWidget<CheckBoxWidget>("lightshaft")->setActivated();
+        getWidget<CheckBoxWidget>("ibl")->setActivated();
         getWidget<CheckBoxWidget>("global_illumination")->setActivated();
         getWidget<CheckBoxWidget>("glow")->setActivated();
         getWidget<CheckBoxWidget>("bloom")->setActivated();
@@ -243,6 +248,7 @@ void CustomVideoSettingsDialog::updateActivation()
         getWidget<CheckBoxWidget>("mlaa")->setDeactivated();
         getWidget<CheckBoxWidget>("ssao")->setDeactivated();
         getWidget<CheckBoxWidget>("lightshaft")->setDeactivated();
+        getWidget<CheckBoxWidget>("ibl")->setDeactivated();
         getWidget<CheckBoxWidget>("global_illumination")->setDeactivated();
         getWidget<CheckBoxWidget>("glow")->setDeactivated();
         getWidget<CheckBoxWidget>("bloom")->setDeactivated();

src/states_screens/options_screen_video.cpp

@@ -61,6 +61,7 @@ struct GFXPreset
     /** Depth of field */
     bool dof;
     bool global_illumination;
+    bool degraded_ibl;
 };
 
 static GFXPreset GFX_PRESETS[] =
@@ -69,35 +70,35 @@ static GFXPreset GFX_PRESETS[] =
         false /* light */, 0 /* shadow */, false /* bloom */, false /* motionblur */,
         false /* lightshaft */, false /* glow */, false /* mlaa */, false /* ssao */, false /* weather */,
         false /* animatedScenery */, 0 /* animatedCharacters */, 0 /* anisotropy */,
-        false /* depth of field */, false /* global illumination */
+        false /* depth of field */, false /* global illumination */, true /* degraded IBL */
     },
 
     {
         false /* light */, 0 /* shadow */, false /* bloom */, false /* motionblur */,
         false /* lightshaft */, false /* glow */, false /* mlaa */, false /* ssao */, false /* weather */,
         true /* animatedScenery */, 1 /* animatedCharacters */, 4 /* anisotropy */,
-        false /* depth of field */, false /* global illumination */
+        false /* depth of field */, false /* global illumination */, true /* degraded IBL */
     },
 
     {
         true /* light */, 0 /* shadow */, false /* bloom */, false /* motionblur */,
         false /* lightshaft */, false /* glow */, false /* mlaa */, false /* ssao */, true /* weather */,
         true /* animatedScenery */, 1 /* animatedCharacters */, 4 /* anisotropy */,
-        false /* depth of field */, false /* global illumination */
+        false /* depth of field */, false /* global illumination */, true /* degraded IBL */
     },
 
     {
         true /* light */, 0 /* shadow */, false /* bloom */, true /* motionblur */,
         true /* lightshaft */, true /* glow */, true /* mlaa */, false /* ssao */, true /* weather */,
         true /* animatedScenery */, 1 /* animatedCharacters */, 8 /* anisotropy */,
-        false /* depth of field */, false /* global illumination */
+        false /* depth of field */, false /* global illumination */, false /* degraded IBL */
     },
 
     {
         true /* light */, 1024 /* shadow */, true /* bloom */, true /* motionblur */,
         true /* lightshaft */, true /* glow */, true /* mlaa */, true /* ssao */, true /* weather */,
         true /* animatedScenery */, 2 /* animatedCharacters */, 16 /* anisotropy */,
-        true /* depth of field */, true /* global illumination */
+        true /* depth of field */, true /* global illumination */, false /* degraded IBL */
     }
 };
 
@@ -395,7 +396,8 @@ void OptionsScreenVideo::updateGfxSlider()
             GFX_PRESETS[l].ssao == UserConfigParams::m_ssao &&
             GFX_PRESETS[l].weather == UserConfigParams::m_weather_effects &&
             GFX_PRESETS[l].dof == UserConfigParams::m_dof &&
-            GFX_PRESETS[l].global_illumination == UserConfigParams::m_gi)
+            GFX_PRESETS[l].global_illumination == UserConfigParams::m_gi &&
+            GFX_PRESETS[l].degraded_ibl == UserConfigParams::m_degraded_IBL)
         {
             gfx->setValue(l + 1);
             found = true;
@@ -567,6 +569,7 @@ void OptionsScreenVideo::eventCallback(Widget* widget, const std::string& name,
         UserConfigParams::m_weather_effects = GFX_PRESETS[level].weather;
         UserConfigParams::m_dof = GFX_PRESETS[level].dof;
         UserConfigParams::m_gi = GFX_PRESETS[level].global_illumination;
+        UserConfigParams::m_degraded_IBL = GFX_PRESETS[level].degraded_ibl;
 
         updateGfxSlider();
     }