2 files changed, 65 insertions, 15 deletions

diff --git a/linden/indra/newview/llwlparammanager.cpp b/linden/indra/newview/llwlparammanager.cpp
index cf6744f..5f80283 100644
--- a/linden/indra/newview/llwlparammanager.cpp
+++ b/linden/indra/newview/llwlparammanager.cpp
@@ -159,6 +159,66 @@ void LLWLParamManager::loadPresets(const std::string& file_name)
 
 }
 
+bool LLWLParamManager::loadPresetXML(const std::string& name, std::istream& preset_stream, bool check_if_real /* = false */)
+{
+        LLSD paramsData(LLSD::emptyMap());
+        
+        LLPointer<LLSDParser> parser = new LLSDXMLParser();
+        
+        if(parser->parse(preset_stream, paramsData, LLSDSerialize::SIZE_UNLIMITED) == LLSDParser::PARSE_FAILURE)
+        {
+                return false;
+        }
+        
+        if(check_if_real)
+        {
+                static const char* expected_windlight_settings[] = {
+                        "ambient",
+                        "blue_density",
+                        "blue_horizon",
+                        "cloud_color",
+                        "cloud_pos_density1",
+                        "cloud_pos_density2",
+                        "cloud_scale",
+                        "cloud_scroll_rate",
+                        "cloud_shadow",
+                        "density_multiplier",
+                        "distance_multiplier",
+                        "east_angle",
+                        "enable_cloud_scroll",
+                        "gamma",
+                        "glow",
+                        "haze_density",
+                        "haze_horizon",
+                        "lightnorm",
+                        "max_y",
+                        "star_brightness",
+                        "sun_angle",
+                        "sunlight_color"
+                };
+                static S32 expected_count = LL_ARRAY_SIZE(expected_windlight_settings);
+                for(S32 i = 0; i < expected_count; ++i)
+                {
+                        if(!paramsData.has(expected_windlight_settings[i]))
+                        {
+                                LL_WARNS("WindLight") << "Attempted to load WindLight param set without " << expected_windlight_settings[i] << LL_ENDL;
+                                return false;
+                        }
+                }
+        }
+        
+        std::map<std::string, LLWLParamSet>::iterator mIt = mParamList.find(name);
+        if(mIt == mParamList.end())
+        {
+                addParamSet(name, paramsData);
+        }
+        else 
+        {
+                setParamSet(name, paramsData);
+        }
+        return true;
+}
+ 
 void LLWLParamManager::savePresets(const std::string & fileName)
 {
         //Nobody currently calls me, but if they did, then its reasonable to write the data out to the user's folder
@@ -211,21 +271,7 @@ void LLWLParamManager::loadPreset(const std::string & name,bool propagate)
 
         if (presetsXML)
         {
-                LLSD paramsData(LLSD::emptyMap());
-
-                LLPointer<LLSDParser> parser = new LLSDXMLParser();
-
-                parser->parse(presetsXML, paramsData, LLSDSerialize::SIZE_UNLIMITED);
-
-                std::map<std::string, LLWLParamSet>::iterator mIt = mParamList.find(name);
-                if(mIt == mParamList.end())
-                {
-                        addParamSet(name, paramsData);
-                }
-                else 
-                {
-                        setParamSet(name, paramsData);
-                }
+                loadPresetXML(name, presetsXML);
                 presetsXML.close();
         } 
         else 
diff --git a/linden/indra/newview/llwlparammanager.h b/linden/indra/newview/llwlparammanager.h
index 6b6300c..141af3c 100644
--- a/linden/indra/newview/llwlparammanager.h
+++ b/linden/indra/newview/llwlparammanager.h
@@ -145,6 +145,10 @@ public:
         /// load an individual preset into the sky
         void loadPreset(const std::string & name,bool propogate=true);
 
+        /// load an individual preset into the sky from an LLSD stream
+        /// Returns whether the stream was actually reasonable XML to load from.
+        bool loadPresetXML(const std::string& name, std::istream& preset_stream, bool check_if_real=false);
+
         /// save the parameter presets to file
         void savePreset(const std::string & name);