2 files changed, 19 insertions, 0 deletions
diff --git a/indra/newview/llfloaterpreference.cpp b/indra/newview/llfloaterpreference.cpp
index 9476a0f6a3..9ea49e935f 100644
--- a/indra/newview/llfloaterpreference.cpp
+++ b/indra/newview/llfloaterpreference.cpp
@@ -317,6 +317,7 @@ LLFloaterPreference::LLFloaterPreference(const LLSD& key)
 	gSavedSettings.getControl("UseDisplayNames")->getCommitSignal()->connect(boost::bind(&handleDisplayNamesOptionChanged,  _2));
 
 	gSavedSettings.getControl("AppearanceCameraMovement")->getCommitSignal()->connect(boost::bind(&handleAppearanceCameraMovementChanged,  _2));
+    gSavedSettings.getControl("WindLightUseAtmosShaders")->getCommitSignal()->connect(boost::bind(&LLFloaterPreference::onAtmosShaderChange, this));
 
 	LLAvatarPropertiesProcessor::getInstance()->addObserver( gAgent.getID(), this );
 
@@ -1729,6 +1730,22 @@ void LLFloaterPreference::onClickActionChange()
     updateClickActionControls();
 }
 
+void LLFloaterPreference::onAtmosShaderChange()
+{
+    LLCheckBoxCtrl* ctrl_alm = getChild<LLCheckBoxCtrl>("UseLightShaders");
+    if(ctrl_alm)
+    {
+        //Deferred/SSAO/Shadows
+        BOOL bumpshiny = gGLManager.mHasCubeMap && LLCubeMap::sUseCubeMaps && LLFeatureManager::getInstance()->isFeatureAvailable("RenderObjectBump") && gSavedSettings.getBOOL("RenderObjectBump");
+        BOOL shaders = gSavedSettings.getBOOL("WindLightUseAtmosShaders");
+        BOOL enabled = LLFeatureManager::getInstance()->isFeatureAvailable("RenderDeferred") &&
+                        bumpshiny &&
+                        shaders;
+
+        ctrl_alm->setEnabled(enabled);
+    }
+}
+
 void LLFloaterPreference::onClickPermsDefault()
 {
 	LLFloaterReg::showInstance("perms_default");
diff --git a/indra/newview/llfloaterpreference.h b/indra/newview/llfloaterpreference.h
index 2aa6ca87b7..6b23c4d4cd 100644
--- a/indra/newview/llfloaterpreference.h
+++ b/indra/newview/llfloaterpreference.h
@@ -139,6 +139,8 @@ protected:
 	// updates click/double-click action keybindngs depending on view values
 	void updateClickActionControls();
 
+    void onAtmosShaderChange();
+
 public:
 	// This function squirrels away the current values of the controls so that
 	// cancel() can restore them.