Sync extern/shiny, set memory budgets for texture and mesh managers (however this has no effect yet and depends on changes in Ogre being made)

apps/openmw/mwrender/renderingmanager.cpp

@@ -14,6 +14,7 @@
 #include <OgreCompositionPass.h>
 #include <OgreHardwarePixelBuffer.h>
 #include <OgreControllerManager.h>
+#include <OgreMeshManager.h>
 
 #include <extern/shiny/Main/Factory.hpp>
 #include <extern/shiny/Platforms/Ogre/OgrePlatform.hpp>
@@ -120,13 +121,11 @@ RenderingManager::RenderingManager(OEngine::Render::OgreRenderer& _rend, const b
     MaterialManager::getSingleton().setDefaultTextureFiltering(tfo);
     MaterialManager::getSingleton().setDefaultAnisotropy( (filter == "anisotropic") ? Settings::Manager::getInt("anisotropy", "General") : 1 );
 
-    //ResourceGroupManager::getSingleton ().declareResource ("GlobalMap.png", "Texture", ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME);
+    Ogre::TextureManager::getSingleton().setMemoryBudget(126*1024*1024);
+    Ogre::MeshManager::getSingleton().setMemoryBudget(64*1024*1024);
 
     ResourceGroupManager::getSingleton().initialiseAllResourceGroups();
 
-    // causes light flicker in opengl when moving..
-    //mRendering.getScene()->setCameraRelativeRendering(true);
-
     // disable unsupported effects
     if (!Settings::Manager::getBool("shaders", "Objects"))
         Settings::Manager::setBool("enabled", "Shadows", false);
@@ -236,6 +235,7 @@ void RenderingManager::toggleWater()
 
 void RenderingManager::cellAdded (MWWorld::Ptr::CellStore *store)
 {
+    sh::Factory::getInstance().unloadUnreferencedMaterials();
     mObjects.buildStaticGeometry (*store);
     mDebugging->cellAdded(store);
     if (store->mCell->isExterior())
@@ -306,7 +306,6 @@ void RenderingManager::update (float duration, bool paused)
 
     int blind = MWWorld::Class::get(player).getCreatureStats(player).getMagicEffects().get(MWMechanics::EffectKey(ESM::MagicEffect::Blind)).mMagnitude;
     mRendering.getFader()->setFactor(1.f-(blind / 100.f));
-
     setAmbientMode();
 
     // player position

extern/shiny/CMakeLists.txt

@@ -9,8 +9,6 @@ set(SHINY_LIBRARY "shiny")
 set(SHINY_OGREPLATFORM_LIBRARY "shiny.OgrePlatform")
 
 # Sources
-file(GLOB SOURCE_FILES Main/*.cpp )
-
 set(SOURCE_FILES
     Main/Factory.cpp
     Main/MaterialInstance.cpp
@@ -57,12 +55,20 @@ file(GLOB OGRE_PLATFORM_SOURCE_FILES Platforms/Ogre/*.cpp)
 
 add_library(${SHINY_LIBRARY} STATIC ${SOURCE_FILES})
 
+set(SHINY_LIBRARIES ${SHINY_LIBRARY})
+
 if (SHINY_BUILD_OGRE_PLATFORM)
     add_library(${SHINY_OGREPLATFORM_LIBRARY} STATIC ${OGRE_PLATFORM_SOURCE_FILES})
+    set(SHINY_LIBRARIES ${SHINY_LIBRARIES} ${SHINY_OGREPLATFORM_LIBRARY})
 endif()
 
+set(SHINY_LIBRARY ${SHINY_LIBRARY} PARENT_SCOPE)
 
-link_directories(${CMAKE_CURRENT_BINARY_DIR})
+if (DEFINED SHINY_BUILD_MATERIAL_EDITOR)
+    add_subdirectory(Editor)
 
-set(SHINY_LIBRARY ${SHINY_LIBRARY} PARENT_SCOPE)
-set(SHINY_OGREPLATFORM_LIBRARY ${SHINY_OGREPLATFORM_LIBRARY} PARENT_SCOPE)
+    set(SHINY_BUILD_EDITOR_FLAG ${SHINY_BUILD_EDITOR_FLAG} PARENT_SCOPE)
+endif()
+
+link_directories(${CMAKE_CURRENT_BINARY_DIR})
+set(SHINY_LIBRARIES ${SHINY_LIBRARIES} PARENT_SCOPE)

extern/shiny/Docs/Configurations.dox

@@ -21,7 +21,7 @@
 	}
 	\endcode
 
-	\note You may also create configurations using sh::Factory::registerConfiguration.
+	\note You may also create configurations using sh::Factory::createConfiguration.
 
 	The active Configuration is controlled by the active material scheme in Ogre. So, in order to use the configuration "reflection_targets" for your reflection renders, simply call
 	\code

extern/shiny/Main/Factory.cpp

@@ -51,8 +51,6 @@ namespace sh
 	{
 		assert(mCurrentLanguage != Language_None);
 
-		bool removeBinaryCache = false;
-
 		if (boost::filesystem::exists (mPlatform->getCacheFolder () + "/lastModified.txt"))
 		{
 			std::ifstream file;
@@ -86,8 +84,9 @@ namespace sh
 					break;
 				}
 
-				PropertySetGet newConfiguration;
+				Configuration newConfiguration;
 				newConfiguration.setParent(&mGlobalSettings);
+				newConfiguration.setSourceFile (it->second->mFileName);
 
 				std::vector<ScriptNode*> props = it->second->getChildren();
 				for (std::vector<ScriptNode*>::const_iterator propIt = props.begin(); propIt != props.end(); ++propIt)
@@ -137,82 +136,7 @@ namespace sh
 		}
 
 		// load shader sets
-		{
-			ScriptLoader shaderSetLoader(".shaderset");
-			ScriptLoader::loadAllFiles (&shaderSetLoader, mPlatform->getBasePath());
-			std::map <std::string, ScriptNode*> nodes = shaderSetLoader.getAllConfigScripts();
-			for (std::map <std::string, ScriptNode*>::const_iterator it = nodes.begin();
-				it != nodes.end(); ++it)
-			{
-				if (!(it->second->getName() == "shader_set"))
-				{
-					std::cerr << "sh::Factory: Warning: Unsupported root node type \"" << it->second->getName() << "\" for file type .shaderset" << std::endl;
-					break;
-				}
-
-				if (!it->second->findChild("profiles_cg"))
-					throw std::runtime_error ("missing \"profiles_cg\" field for \"" + it->first + "\"");
-				if (!it->second->findChild("profiles_hlsl"))
-					throw std::runtime_error ("missing \"profiles_hlsl\" field for \"" + it->first + "\"");
-				if (!it->second->findChild("source"))
-					throw std::runtime_error ("missing \"source\" field for \"" + it->first + "\"");
-				if (!it->second->findChild("type"))
-					throw std::runtime_error ("missing \"type\" field for \"" + it->first + "\"");
-
-				std::vector<std::string> profiles_cg;
-				boost::split (profiles_cg, it->second->findChild("profiles_cg")->getValue(), boost::is_any_of(" "));
-				std::string cg_profile;
-				for (std::vector<std::string>::iterator it2 = profiles_cg.begin(); it2 != profiles_cg.end(); ++it2)
-				{
-					if (mPlatform->isProfileSupported(*it2))
-					{
-						cg_profile = *it2;
-						break;
-					}
-				}
-
-				std::vector<std::string> profiles_hlsl;
-				boost::split (profiles_hlsl, it->second->findChild("profiles_hlsl")->getValue(), boost::is_any_of(" "));
-				std::string hlsl_profile;
-				for (std::vector<std::string>::iterator it2 = profiles_hlsl.begin(); it2 != profiles_hlsl.end(); ++it2)
-				{
-					if (mPlatform->isProfileSupported(*it2))
-					{
-						hlsl_profile = *it2;
-						break;
-					}
-				}
-
-				std::string sourceAbsolute = mPlatform->getBasePath() + "/" + it->second->findChild("source")->getValue();
-				std::string sourceRelative = it->second->findChild("source")->getValue();
-
-				ShaderSet newSet (it->second->findChild("type")->getValue(), cg_profile, hlsl_profile,
-								  sourceAbsolute,
-								  mPlatform->getBasePath(),
-								  it->first,
-								  &mGlobalSettings);
-
-				int lastModified = boost::filesystem::last_write_time (boost::filesystem::path(sourceAbsolute));
-				mShadersLastModifiedNew[sourceRelative] = lastModified;
-				if (mShadersLastModified.find(sourceRelative) != mShadersLastModified.end())
-				{
-					if (mShadersLastModified[sourceRelative] != lastModified)
-					{
-						// delete any outdated shaders based on this shader set
-						if (removeCache (it->first))
-							removeBinaryCache = true;
-					}
-				}
-				else
-				{
-					// if we get here, this is either the first run or a new shader file was added
-					// in both cases we can safely delete
-					if (removeCache (it->first))
-						removeBinaryCache = true;
-				}
-				mShaderSets.insert(std::make_pair(it->first, newSet));
-			}
-		}
+		bool removeBinaryCache = reloadShaders();
 
 		// load materials
 		{
@@ -315,6 +239,8 @@ namespace sh
 
 	Factory::~Factory ()
 	{
+		mShaderSets.clear();
+
 		if (mPlatform->supportsShaderSerialization () && mWriteMicrocodeCache)
 		{
 			std::string file = mPlatform->getCacheFolder () + "/" + mBinaryCacheName;
@@ -367,15 +293,16 @@ namespace sh
 			while (i>0)
 			{
 				--i;
-				m->createForConfiguration (configuration, i);
-
-				if (mListener)
+				if (m->createForConfiguration (configuration, i) && mListener)
 					mListener->materialCreated (m, configuration, i);
+				else
+					return NULL;
 			}
 
-			m->createForConfiguration (configuration, lodIndex);
-			if (mListener)
+			if (m->createForConfiguration (configuration, lodIndex) && mListener)
 				mListener->materialCreated (m, configuration, lodIndex);
+			else
+				return NULL;
 		}
 		return m;
 	}
@@ -439,6 +366,12 @@ namespace sh
 
 	ShaderSet* Factory::getShaderSet (const std::string& name)
 	{
+		if (mShaderSets.find(name) == mShaderSets.end())
+		{
+			std::stringstream msg;
+			msg << "Shader '" << name << "' not found";
+			throw std::runtime_error(msg.str());
+		}
 		return &mShaderSets.find(name)->second;
 	}
 
@@ -466,6 +399,14 @@ namespace sh
 		}
 	}
 
+	void Factory::notifyConfigurationChanged()
+	{
+		for (MaterialMap::iterator it = mMaterials.begin(); it != mMaterials.end(); ++it)
+		{
+			it->second.destroyAll();
+		}
+	}
+
 	MaterialInstance* Factory::getMaterialInstance (const std::string& name)
 	{
 		return findInstance(name);
@@ -493,17 +434,21 @@ namespace sh
 			return "";
 	}
 
-	PropertySetGet* Factory::getConfiguration (const std::string& name)
+	Configuration* Factory::getConfiguration (const std::string& name)
 	{
 		return &mConfigurations[name];
 	}
 
-	void Factory::registerConfiguration (const std::string& name, PropertySetGet configuration)
+	void Factory::createConfiguration (const std::string& name)
 	{
-		mConfigurations[name] = configuration;
 		mConfigurations[name].setParent (&mGlobalSettings);
 	}
 
+	void Factory::destroyConfiguration(const std::string &name)
+	{
+		mConfigurations.erase(name);
+	}
+
 	void Factory::registerLodConfiguration (int index, PropertySetGet configuration)
 	{
 		mLodConfigurations[index] = configuration;
@@ -571,17 +516,93 @@ namespace sh
 		return p;
 	}
 
-	void Factory::saveMaterials (const std::string& filename)
+	void Factory::saveAll ()
 	{
-		std::ofstream file;
-		file.open (filename.c_str ());
+		std::map<std::string, std::ofstream*> files;
+		for (MaterialMap::iterator it = mMaterials.begin(); it != mMaterials.end(); ++it)
+		{
+			if (it->second.getSourceFile().empty())
+				continue;
+			if (files.find(it->second.getSourceFile()) == files.end())
+			{
+				/// \todo check if this is actually the same file, since there can be different paths to the same file
+				std::ofstream* stream = new std::ofstream();
+				stream->open (it->second.getSourceFile().c_str());
+
+				files[it->second.getSourceFile()] = stream;
+			}
+			it->second.save (*files[it->second.getSourceFile()]);
+		}
+
+		for (std::map<std::string, std::ofstream*>::iterator it = files.begin(); it != files.end(); ++it)
+		{
+			delete it->second;
+		}
+		files.clear();
+
+		for (ConfigurationMap::iterator it = mConfigurations.begin(); it != mConfigurations.end(); ++it)
+		{
+			if (it->second.getSourceFile().empty())
+				continue;
+			if (files.find(it->second.getSourceFile()) == files.end())
+			{
+				/// \todo check if this is actually the same file, since there can be different paths to the same file
+				std::ofstream* stream = new std::ofstream();
+				stream->open (it->second.getSourceFile().c_str());
+
+				files[it->second.getSourceFile()] = stream;
+			}
+			it->second.save (it->first, *files[it->second.getSourceFile()]);
+		}
+
+		for (std::map<std::string, std::ofstream*>::iterator it = files.begin(); it != files.end(); ++it)
+		{
+			delete it->second;
+		}
+	}
 
+	void Factory::listMaterials(std::vector<std::string> &out)
+	{
 		for (MaterialMap::iterator it = mMaterials.begin(); it != mMaterials.end(); ++it)
 		{
-			it->second.save(file);
+			out.push_back(it->first);
+		}
 	}
 
-		file.close();
+	void Factory::listGlobalSettings(std::map<std::string, std::string> &out)
+	{
+		const PropertyMap& properties = mGlobalSettings.listProperties();
+
+		for (PropertyMap::const_iterator it = properties.begin(); it != properties.end(); ++it)
+		{
+			out[it->first] = retrieveValue<StringValue>(mGlobalSettings.getProperty(it->first), NULL).get();
+		}
+	}
+
+	void Factory::listConfigurationSettings(const std::string& name, std::map<std::string, std::string> &out)
+	{
+		const PropertyMap& properties = mConfigurations[name].listProperties();
+
+		for (PropertyMap::const_iterator it = properties.begin(); it != properties.end(); ++it)
+		{
+			out[it->first] = retrieveValue<StringValue>(mConfigurations[name].getProperty(it->first), NULL).get();
+		}
+	}
+
+	void Factory::listConfigurationNames(std::vector<std::string> &out)
+	{
+		for (ConfigurationMap::const_iterator it = mConfigurations.begin(); it != mConfigurations.end(); ++it)
+		{
+			out.push_back(it->first);
+		}
+	}
+
+	void Factory::listShaderSets(std::vector<std::string> &out)
+	{
+		for (ShaderSetMap::const_iterator it = mShaderSets.begin(); it != mShaderSets.end(); ++it)
+		{
+			out.push_back(it->first);
+		}
 	}
 
 	void Factory::_ensureMaterial(const std::string& name, const std::string& configuration)
@@ -630,4 +651,146 @@ namespace sh
 		}
 		return ret;
 	}
+
+	bool Factory::reloadShaders()
+	{
+		mShaderSets.clear();
+		notifyConfigurationChanged();
+
+		bool removeBinaryCache = false;
+		ScriptLoader shaderSetLoader(".shaderset");
+		ScriptLoader::loadAllFiles (&shaderSetLoader, mPlatform->getBasePath());
+		std::map <std::string, ScriptNode*> nodes = shaderSetLoader.getAllConfigScripts();
+		for (std::map <std::string, ScriptNode*>::const_iterator it = nodes.begin();
+			it != nodes.end(); ++it)
+		{
+			if (!(it->second->getName() == "shader_set"))
+			{
+				std::cerr << "sh::Factory: Warning: Unsupported root node type \"" << it->second->getName() << "\" for file type .shaderset" << std::endl;
+				break;
+			}
+
+			if (!it->second->findChild("profiles_cg"))
+				throw std::runtime_error ("missing \"profiles_cg\" field for \"" + it->first + "\"");
+			if (!it->second->findChild("profiles_hlsl"))
+				throw std::runtime_error ("missing \"profiles_hlsl\" field for \"" + it->first + "\"");
+			if (!it->second->findChild("source"))
+				throw std::runtime_error ("missing \"source\" field for \"" + it->first + "\"");
+			if (!it->second->findChild("type"))
+				throw std::runtime_error ("missing \"type\" field for \"" + it->first + "\"");
+
+			std::vector<std::string> profiles_cg;
+			boost::split (profiles_cg, it->second->findChild("profiles_cg")->getValue(), boost::is_any_of(" "));
+			std::string cg_profile;
+			for (std::vector<std::string>::iterator it2 = profiles_cg.begin(); it2 != profiles_cg.end(); ++it2)
+			{
+				if (mPlatform->isProfileSupported(*it2))
+				{
+					cg_profile = *it2;
+					break;
+				}
+			}
+
+			std::vector<std::string> profiles_hlsl;
+			boost::split (profiles_hlsl, it->second->findChild("profiles_hlsl")->getValue(), boost::is_any_of(" "));
+			std::string hlsl_profile;
+			for (std::vector<std::string>::iterator it2 = profiles_hlsl.begin(); it2 != profiles_hlsl.end(); ++it2)
+			{
+				if (mPlatform->isProfileSupported(*it2))
+				{
+					hlsl_profile = *it2;
+					break;
+				}
+			}
+
+			std::string sourceAbsolute = mPlatform->getBasePath() + "/" + it->second->findChild("source")->getValue();
+			std::string sourceRelative = it->second->findChild("source")->getValue();
+
+			ShaderSet newSet (it->second->findChild("type")->getValue(), cg_profile, hlsl_profile,
+							  sourceAbsolute,
+							  mPlatform->getBasePath(),
+							  it->first,
+							  &mGlobalSettings);
+
+			int lastModified = boost::filesystem::last_write_time (boost::filesystem::path(sourceAbsolute));
+			mShadersLastModifiedNew[sourceRelative] = lastModified;
+			if (mShadersLastModified.find(sourceRelative) != mShadersLastModified.end())
+			{
+				if (mShadersLastModified[sourceRelative] != lastModified)
+				{
+					// delete any outdated shaders based on this shader set
+					if (removeCache (it->first))
+						removeBinaryCache = true;
+					mShadersLastModified[sourceRelative] = lastModified;
+				}
+			}
+			else
+			{
+				// if we get here, this is either the first run or a new shader file was added
+				// in both cases we can safely delete
+				if (removeCache (it->first))
+					removeBinaryCache = true;
+				mShadersLastModified[sourceRelative] = lastModified;
+			}
+			mShaderSets.insert(std::make_pair(it->first, newSet));
+		}
+
+		return removeBinaryCache;
+	}
+
+	void Factory::doMonitorShaderFiles()
+	{
+		bool reload=false;
+		ScriptLoader shaderSetLoader(".shaderset");
+		ScriptLoader::loadAllFiles (&shaderSetLoader, mPlatform->getBasePath());
+		std::map <std::string, ScriptNode*> nodes = shaderSetLoader.getAllConfigScripts();
+		for (std::map <std::string, ScriptNode*>::const_iterator it = nodes.begin();
+			it != nodes.end(); ++it)
+		{
+
+			std::string sourceAbsolute = mPlatform->getBasePath() + "/" + it->second->findChild("source")->getValue();
+			std::string sourceRelative = it->second->findChild("source")->getValue();
+
+			int lastModified = boost::filesystem::last_write_time (boost::filesystem::path(sourceAbsolute));
+			if (mShadersLastModified.find(sourceRelative) != mShadersLastModified.end())
+			{
+				if (mShadersLastModified[sourceRelative] != lastModified)
+				{
+					reload=true;
+					break;
+				}
+			}
+		}
+		if (reload)
+			reloadShaders();
+	}
+
+	void Factory::logError(const std::string &msg)
+	{
+		mErrorLog << msg << '\n';
+	}
+
+	std::string Factory::getErrorLog()
+	{
+		std::string errors = mErrorLog.str();
+		mErrorLog.str("");
+		return errors;
+	}
+
+	void Factory::unloadUnreferencedMaterials()
+	{
+		for (MaterialMap::iterator it = mMaterials.begin(); it != mMaterials.end(); ++it)
+		{
+			if (it->second.getMaterial()->isUnreferenced())
+				it->second.destroyAll();
+		}
+	}
+
+	void Configuration::save(const std::string& name, std::ofstream &stream)
+	{
+		stream << "configuration " << name << '\n';
+		stream << "{\n";
+		PropertySetGet::save(stream, "\t");
+		stream << "}\n";
+	}
 }

extern/shiny/Main/Factory.hpp

@@ -3,6 +3,7 @@
 
 #include <map>
 #include <string>
+#include <sstream>
 
 #include "MaterialInstance.hpp"
 #include "ShaderSet.hpp"
@@ -12,9 +13,21 @@ namespace sh
 {
 	class Platform;
 
+	class Configuration : public PropertySetGet
+	{
+	public:
+		void setSourceFile (const std::string& file) { mSourceFile = file ; }
+		std::string getSourceFile () { return mSourceFile; }
+
+		void save(const std::string& name, std::ofstream &stream);
+
+	private:
+		std::string mSourceFile;
+	};
+
 	typedef std::map<std::string, MaterialInstance> MaterialMap;
 	typedef std::map<std::string, ShaderSet> ShaderSetMap;
-	typedef std::map<std::string, PropertySetGet> ConfigurationMap;
+	typedef std::map<std::string, Configuration> ConfigurationMap;
 	typedef std::map<int, PropertySetGet> LodConfigurationMap;
 	typedef std::map<std::string, int> LastModifiedMap;
 
@@ -81,8 +94,8 @@ namespace sh
 		/// Get a MaterialInstance by name
 		MaterialInstance* getMaterialInstance (const std::string& name);
 
-		/// Register a configuration, which can then be used by switching the active material scheme
-		void registerConfiguration (const std::string& name, PropertySetGet configuration);
+		/// Create a configuration, which can then be altered by using Factory::getConfiguration
+		void createConfiguration (const std::string& name);
 
 		/// Register a lod configuration, which can then be used by setting up lod distance values for the material \n
 		/// 0 refers to highest lod, so use 1 or higher as index parameter
@@ -125,8 +138,48 @@ namespace sh
 		/// \note The default is off (no cache reading)
 		void setReadMicrocodeCache(bool read) { mReadMicrocodeCache = read; }
 
-		/// Saves all the materials that were initially loaded from the file with this name
-		void saveMaterials (const std::string& filename);
+		/// Lists all materials currently registered with the factory. Whether they are
+		/// loaded or not does not matter.
+		void listMaterials (std::vector<std::string>& out);
+
+		/// Lists current name & value of all global settings.
+		void listGlobalSettings (std::map<std::string, std::string>& out);
+
+		/// Lists configuration names.
+		void listConfigurationNames (std::vector<std::string>& out);
+
+		/// Lists current name & value of settings for a given configuration.
+		void listConfigurationSettings (const std::string& name, std::map<std::string, std::string>& out);
+
+		/// Lists shader sets.
+		void listShaderSets (std::vector<std::string>& out);
+
+		/// \note This only works if microcode caching is disabled, as there is currently no way to remove the cache
+		/// through the Ogre API. Luckily, this is already fixed in Ogre 1.9.
+		bool reloadShaders();
+
+		/// Calls reloadShaders() if shader files have been modified since the last reload.
+		/// \note This only works if microcode caching is disabled, as there is currently no way to remove the cache
+		/// through the Ogre API. Luckily, this is already fixed in Ogre 1.9.
+		void doMonitorShaderFiles();
+
+		/// Unloads all materials that are currently not referenced. This will not unload the textures themselves,
+		/// but it will let go of the SharedPtr's to the textures, so that you may unload them if you so desire. \n
+		/// A good time to call this would be after a new level has been loaded, but just calling it occasionally after a period
+		/// of time should work just fine too.
+		void unloadUnreferencedMaterials();
+
+		void destroyConfiguration (const std::string& name);
+
+		void notifyConfigurationChanged();
+
+		/// Saves all materials and configurations, by default to the file they were loaded from.
+		/// If you wish to save them elsewhere, use setSourceFile first.
+		void saveAll ();
+
+		/// Returns the error log as a string, then clears it.
+		/// Note: Errors are also written to the standard error output, or thrown if they are fatal.
+		std::string getErrorLog ();
 
 		static Factory& getInstance();
 		///< Return instance of this class.
@@ -137,11 +190,13 @@ namespace sh
 		/// You will probably never have to use this.
 		void _ensureMaterial(const std::string& name, const std::string& configuration);
 
+
+		Configuration* getConfiguration (const std::string& name);
+
 	private:
 
 		MaterialInstance* requestMaterial (const std::string& name, const std::string& configuration, unsigned short lodIndex);
 		ShaderSet* getShaderSet (const std::string& name);
-		PropertySetGet* getConfiguration (const std::string& name);
 		Platform* getPlatform ();
 
 		PropertySetGet* getCurrentGlobalSettings();
@@ -163,6 +218,8 @@ namespace sh
 
 		std::map<TextureUnitState*, std::string> mTextureAliasInstances;
 
+		void logError (const std::string& msg);
+
 		friend class Platform;
 		friend class MaterialInstance;
 		friend class ShaderInstance;
@@ -179,6 +236,7 @@ namespace sh
 		bool mWriteMicrocodeCache;
 		bool mReadSourceCache;
 		bool mWriteSourceCache;
+		std::stringstream mErrorLog;
 
 		MaterialMap mMaterials;
 		ShaderSetMap mShaderSets;

extern/shiny/Main/MaterialInstance.cpp

@@ -1,6 +1,7 @@
 #include "MaterialInstance.hpp"
 
 #include <stdexcept>
+#include <iostream>
 
 #include "Factory.hpp"
 #include "ShaderSet.hpp"
@@ -12,6 +13,7 @@ namespace sh
 		, mShadersEnabled(true)
 		, mFactory(f)
 		, mListener(NULL)
+		, mFailedToCreate(false)
 	{
 	}
 
@@ -46,6 +48,7 @@ namespace sh
 			return;
 		mMaterial->removeAll();
 		mTexUnits.clear();
+		mFailedToCreate = false;
 	}
 
 	void MaterialInstance::setProperty (const std::string& name, PropertyValuePtr value)
@@ -54,11 +57,15 @@ namespace sh
 		destroyAll(); // trigger updates
 	}
 
-	void MaterialInstance::createForConfiguration (const std::string& configuration, unsigned short lodIndex)
+	bool MaterialInstance::createForConfiguration (const std::string& configuration, unsigned short lodIndex)
 	{
+		if (mFailedToCreate)
+			return false;
+		try{
+			mMaterial->ensureLoaded();
 			bool res = mMaterial->createConfiguration(configuration, lodIndex);
 			if (!res)
-			return; // listener was false positive
+				return false; // listener was false positive
 
 			if (mListener)
 				mListener->requestedConfiguration (this, configuration);
@@ -75,11 +82,11 @@ namespace sh
 			bool useShaders = mShadersEnabled || !allowFixedFunction;
 
 			// get passes of the top-most parent
-		PassVector passes = getPasses();
-		if (passes.size() == 0)
+			PassVector* passes = getParentPasses();
+			if (passes->empty())
 				throw std::runtime_error ("material \"" + mName + "\" does not have any passes");
 
-		for (PassVector::iterator it = passes.begin(); it != passes.end(); ++it)
+			for (PassVector::iterator it = passes->begin(); it != passes->end(); ++it)
 			{
 				boost::shared_ptr<Pass> pass = mMaterial->createPass (configuration, lodIndex);
 				it->copyAll (pass.get(), this);
@@ -91,8 +98,10 @@ namespace sh
 				PropertySetGet* context = this;
 
 				// create or retrieve shaders
-			bool hasVertex = it->hasProperty("vertex_program");
-			bool hasFragment = it->hasProperty("fragment_program");
+				bool hasVertex = it->hasProperty("vertex_program")
+						&& !retrieveValue<StringValue>(it->getProperty("vertex_program"), context).get().empty();
+				bool hasFragment = it->hasProperty("fragment_program")
+						&& !retrieveValue<StringValue>(it->getProperty("fragment_program"), context).get().empty();
 				if (useShaders)
 				{
 					it->setContext(context);
@@ -107,9 +116,9 @@ namespace sh
 							v->setUniformParameters (pass, &it->mShaderProperties);
 
 							std::vector<std::string> sharedParams = v->getSharedParameters ();
-						for (std::vector<std::string>::iterator it = sharedParams.begin(); it != sharedParams.end(); ++it)
+							for (std::vector<std::string>::iterator it2 = sharedParams.begin(); it2 != sharedParams.end(); ++it2)
 							{
-							pass->addSharedParameter (GPT_Vertex, *it);
+								pass->addSharedParameter (GPT_Vertex, *it2);
 							}
 
 							std::vector<std::string> vector = v->getUsedSamplers ();
@@ -126,9 +135,9 @@ namespace sh
 							f->setUniformParameters (pass, &it->mShaderProperties);
 
 							std::vector<std::string> sharedParams = f->getSharedParameters ();
-						for (std::vector<std::string>::iterator it = sharedParams.begin(); it != sharedParams.end(); ++it)
+							for (std::vector<std::string>::iterator it2 = sharedParams.begin(); it2 != sharedParams.end(); ++it2)
 							{
-							pass->addSharedParameter (GPT_Fragment, *it);
+								pass->addSharedParameter (GPT_Fragment, *it2);
 							}
 
 							std::vector<std::string> vector = f->getUsedSamplers ();
@@ -138,9 +147,9 @@ namespace sh
 				}
 
 				// create texture units
-			std::vector<MaterialInstanceTextureUnit> texUnits = it->getTexUnits();
+				std::vector<MaterialInstanceTextureUnit>* texUnits = &it->mTexUnits;
 				int i=0;
-			for (std::vector<MaterialInstanceTextureUnit>::iterator texIt = texUnits.begin(); texIt  != texUnits.end(); ++texIt )
+				for (std::vector<MaterialInstanceTextureUnit>::iterator texIt = texUnits->begin(); texIt  != texUnits->end(); ++texIt )
 				{
 					// only create those that are needed by the shader, OR those marked to be created in fixed function pipeline if shaders are disabled
 					bool foundVertex = std::find(usedTextureSamplersVertex.begin(), usedTextureSamplersVertex.end(), texIt->getName()) != usedTextureSamplersVertex.end();
@@ -148,7 +157,7 @@ namespace sh
 					if (  (foundVertex || foundFragment)
 							|| (((!useShaders || (!hasVertex || !hasFragment)) && allowFixedFunction) && texIt->hasProperty("create_in_ffp") && retrieveValue<BooleanValue>(texIt->getProperty("create_in_ffp"), this).get()))
 					{
-					boost::shared_ptr<TextureUnitState> texUnit = pass->createTextureUnitState ();
+						boost::shared_ptr<TextureUnitState> texUnit = pass->createTextureUnitState (texIt->getName());
 						texIt->copyAll (texUnit.get(), context);
 
 						mTexUnits.push_back(texUnit);
@@ -166,6 +175,18 @@ namespace sh
 
 			if (mListener)
 				mListener->createdConfiguration (this, configuration);
+			return true;
+
+		} catch (std::runtime_error& e)
+		{
+			destroyAll();
+			mFailedToCreate = true;
+			std::stringstream msg;
+			msg << "Error while creating material " << mName << ": " << e.what();
+			std::cerr << msg.str() << std::endl;
+			mFactory->logError(msg.str());
+			return false;
+		}
 	}
 
 	Material* MaterialInstance::getMaterial ()
@@ -180,12 +201,23 @@ namespace sh
 		return &mPasses.back();
 	}
 
-	PassVector MaterialInstance::getPasses()
+	void MaterialInstance::deletePass(unsigned int index)
+	{
+		assert(mPasses.size() > index);
+		mPasses.erase(mPasses.begin()+index);
+	}
+
+	PassVector* MaterialInstance::getParentPasses()
 	{
 		if (mParent)
-			return static_cast<MaterialInstance*>(mParent)->getPasses();
+			return static_cast<MaterialInstance*>(mParent)->getParentPasses();
 		else
-			return mPasses;
+			return &mPasses;
+	}
+
+	PassVector* MaterialInstance::getPasses()
+	{
+		return &mPasses;
 	}
 
 	void MaterialInstance::setShadersEnabled (bool enabled)
@@ -206,7 +238,7 @@ namespace sh
 
 		if (mParent)
 		{
-			stream << "\t" << static_cast<MaterialInstance*>(mParent)->getName() << "\n";
+			stream << "\t" << "parent " << static_cast<MaterialInstance*>(mParent)->getName() << "\n";
 		}
 
 		const PropertyMap& properties = listProperties ();
@@ -215,6 +247,14 @@ namespace sh
 			stream << "\t" << it->first << " " << retrieveValue<StringValue>(getProperty(it->first), NULL).get() << "\n";
 		}
 
+		for (PassVector::iterator it = mPasses.begin(); it != mPasses.end(); ++it)
+		{
+			stream << "\tpass" << '\n';
+			stream << "\t{" << '\n';
+			it->save(stream);
+			stream << "\t}" << '\n';
+		}
+
 		stream << "}\n";
 	}
 }

extern/shiny/Main/MaterialInstance.hpp

@@ -41,8 +41,12 @@ namespace sh
 		MaterialInstance (const std::string& name, Factory* f);
 		virtual ~MaterialInstance ();
 
+		PassVector* getParentPasses(); ///< gets the passes of the top-most parent
+
+		PassVector* getPasses(); ///< get our passes (for derived materials, none)
+
 		MaterialInstancePass* createPass ();
-		PassVector getPasses(); ///< gets the passes of the top-most parent
+		void deletePass (unsigned int index);
 
 		/// @attention Because the backend material passes are created on demand, the returned material here might not contain anything yet!
 		/// The only place where you should use this method, is for the MaterialInstance given by the MaterialListener::materialCreated event!
@@ -55,25 +59,25 @@ namespace sh
 
 		virtual void setProperty (const std::string& name, PropertyValuePtr value);
 
+		void setSourceFile(const std::string& sourceFile) { mSourceFile = sourceFile; }
+
+		std::string getSourceFile() { return mSourceFile; }
+		///< get the name of the file this material was read from, or empty if it was created dynamically by code
+
 	private:
 		void setParentInstance (const std::string& name);
 		std::string getParentInstance ();
 
 		void create (Platform* platform);
-		void createForConfiguration (const std::string& configuration, unsigned short lodIndex);
+		bool createForConfiguration (const std::string& configuration, unsigned short lodIndex);
 
 		void destroyAll ();
 
 		void setShadersEnabled (bool enabled);
 
-		void setSourceFile(const std::string& sourceFile) { mSourceFile = sourceFile; }
-
-		std::string getSourceFile() { return mSourceFile; }
-		///< get the name of the file this material was read from, or empty if it was created dynamically by code
-
 		void save (std::ofstream& stream);
-		///< this will only save the properties, not the passes and texture units, and as such
-		/// is only intended to be used for derived materials
+
+		bool mFailedToCreate;
 
 		friend class Factory;
 

extern/shiny/Main/MaterialInstancePass.cpp

@@ -1,5 +1,7 @@
 #include "MaterialInstancePass.hpp"
 
+#include <fstream>
+
 namespace sh
 {
 
@@ -9,8 +11,25 @@ namespace sh
 		return &mTexUnits.back();
 	}
 
-	std::vector <MaterialInstanceTextureUnit> MaterialInstancePass::getTexUnits ()
+	void MaterialInstancePass::save(std::ofstream &stream)
+	{
+		if (mShaderProperties.listProperties().size())
 		{
-		return mTexUnits;
+			stream << "\t\t" << "shader_properties" << '\n';
+			stream << "\t\t{\n";
+			mShaderProperties.save(stream, "\t\t\t");
+			stream << "\t\t}\n";
+		}
+
+		PropertySetGet::save(stream, "\t\t");
+
+		for (std::vector <MaterialInstanceTextureUnit>::iterator it = mTexUnits.begin();
+			 it != mTexUnits.end(); ++it)
+		{
+			stream << "\t\ttexture_unit " << it->getName() << '\n';
+			stream << "\t\t{\n";
+			it->save(stream, "\t\t\t");
+			stream << "\t\t}\n";
+		}
 	}
 }

extern/shiny/Main/MaterialInstancePass.hpp

@@ -18,10 +18,10 @@ namespace sh
 	public:
 		MaterialInstanceTextureUnit* createTextureUnit (const std::string& name);
 
+		void save (std::ofstream& stream);
+
 		PropertySetGet mShaderProperties;
 
-		std::vector <MaterialInstanceTextureUnit> getTexUnits ();
-	private:
 		std::vector <MaterialInstanceTextureUnit> mTexUnits;
 	};
 }

extern/shiny/Main/MaterialInstanceTextureUnit.hpp

@@ -18,6 +18,7 @@ namespace sh
 	public:
 		MaterialInstanceTextureUnit (const std::string& name);
 		std::string getName() const;
+		void setName (const std::string& name) { mName = name; }
 	private:
 		std::string mName;
 	};

extern/shiny/Main/Platform.cpp

@@ -9,7 +9,7 @@ namespace sh
 	Platform::Platform (const std::string& basePath)
 		: mBasePath(basePath)
 		, mCacheFolder("./")
-		, mShaderCachingEnabled(false)
+		, mFactory(NULL)
 	{
 	}
 
@@ -57,11 +57,6 @@ namespace sh
 		mCacheFolder = folder;
 	}
 
-	void Platform::setShaderCachingEnabled (bool enabled)
-	{
-		mShaderCachingEnabled = enabled;
-	}
-
 	std::string Platform::getCacheFolder() const
 	{
 		return mCacheFolder;

extern/shiny/Main/Platform.hpp

@@ -24,6 +24,7 @@ namespace sh
 	class GpuProgram
 	{
 	public:
+        virtual ~GpuProgram() {}
 		virtual bool getSupported () = 0; ///< @return true if the compilation was successful
 
 		/// @param name name of the uniform in the shader
@@ -36,7 +37,6 @@ namespace sh
 	{
 	public:
         virtual ~TextureUnitState();
-
 		virtual void setTextureName (const std::string& textureName) = 0;
 
 	protected:
@@ -46,7 +46,7 @@ namespace sh
 	class Pass : public PropertySet
 	{
 	public:
-		virtual boost::shared_ptr<TextureUnitState> createTextureUnitState () = 0;
+		virtual boost::shared_ptr<TextureUnitState> createTextureUnitState (const std::string& name) = 0;
 		virtual void assignProgram (GpuProgramType type, const std::string& name) = 0;
 
 		/// @param type gpu program type
@@ -68,6 +68,9 @@ namespace sh
 		virtual bool createConfiguration (const std::string& name, unsigned short lodIndex) = 0; ///< @return false if already exists
 		virtual void removeAll () = 0; ///< remove all configurations
 
+		virtual bool isUnreferenced() = 0;
+		virtual void ensureLoaded() = 0;
+
 		virtual void setLodLevels (const std::string& lodLevels) = 0;
 
 		virtual void setShadowCasterMaterial (const std::string& name) = 0;
@@ -79,8 +82,6 @@ namespace sh
 		Platform (const std::string& basePath);
 		virtual ~Platform ();
 
-		void setShaderCachingEnabled (bool enabled);
-
 		/// set the folder to use for shader caching
 		void setCacheFolder (const std::string& folder);
 
@@ -93,6 +94,8 @@ namespace sh
 			const std::string& name, const std::string& profile,
 			const std::string& source, Language lang) = 0;
 
+		virtual void destroyGpuProgram (const std::string& name) = 0;
+
 		virtual void setSharedParameter (const std::string& name, PropertyValuePtr value) = 0;
 
 		virtual bool isProfileSupported (const std::string& profile) = 0;
@@ -105,6 +108,7 @@ namespace sh
 		friend class Factory;
 		friend class MaterialInstance;
 		friend class ShaderInstance;
+		friend class ShaderSet;
 
 	protected:
 		/**
@@ -131,9 +135,6 @@ namespace sh
 		std::string mCacheFolder;
 		Factory* mFactory;
 
-	protected:
-		bool mShaderCachingEnabled;
-
 	private:
 		void setFactory (Factory* factory);
 

extern/shiny/Main/PropertyBase.cpp

@@ -6,6 +6,8 @@
 #include <boost/lexical_cast.hpp>
 #include <boost/algorithm/string.hpp>
 
+#include <fstream>
+
 namespace sh
 {
 
@@ -39,8 +41,9 @@ namespace sh
 			mValue = false;
 		else
 		{
-			std::cerr << "sh::BooleanValue: Warning: Unrecognized value \"" << in << "\" for property value of type BooleanValue" << std::endl;
-			mValue = false;
+			std::stringstream msg;
+			msg << "sh::BooleanValue: Warning: Unrecognized value \"" << in << "\" for property value of type BooleanValue";
+			throw std::runtime_error(msg.str());
 		}
 	}
 
@@ -183,12 +186,16 @@ namespace sh
 	void PropertySet::setProperty (const std::string& name, PropertyValuePtr &value, PropertySetGet* context)
 	{
 		if (!setPropertyOverride (name, value, context))
-			std::cerr << "sh::PropertySet: Warning: No match for property with name '" << name << "'" << std::endl;
+		{
+			std::stringstream msg;
+			msg << "sh::PropertySet: Warning: No match for property with name '" << name << "'";
+			throw std::runtime_error(msg.str());
+		}
 	}
 
 	bool PropertySet::setPropertyOverride (const std::string& name, PropertyValuePtr &value, PropertySetGet* context)
 	{
-		// if we got here, none of the sub-classes was able to make use of the property
+		// if we got here, none of the sub-classes were able to make use of the property
 		return false;
 	}
 
@@ -226,6 +233,11 @@ namespace sh
 		mProperties [name] = value;
 	}
 
+	void PropertySetGet::deleteProperty(const std::string &name)
+	{
+		mProperties.erase(name);
+	}
+
 	PropertyValuePtr& PropertySetGet::getProperty (const std::string& name)
 	{
 		bool found = (mProperties.find(name) != mProperties.end());
@@ -241,7 +253,7 @@ namespace sh
 			return mProperties[name];
 	}
 
-	bool PropertySetGet::hasProperty (const std::string& name)
+	bool PropertySetGet::hasProperty (const std::string& name) const
 	{
 		bool found = (mProperties.find(name) != mProperties.end());
 
@@ -256,13 +268,35 @@ namespace sh
 			return true;
 	}
 
-	void PropertySetGet::copyAll (PropertySet* target, PropertySetGet* context)
+	void PropertySetGet::copyAll (PropertySet* target, PropertySetGet* context, bool copyParent)
 	{
-		if (mParent)
+		if (mParent && copyParent)
 			mParent->copyAll (target, context);
 		for (PropertyMap::iterator it = mProperties.begin(); it != mProperties.end(); ++it)
 		{
 			target->setProperty(it->first, it->second, context);
 		}
 	}
+
+	void PropertySetGet::copyAll (PropertySetGet* target, PropertySetGet* context, bool copyParent)
+	{
+		if (mParent && copyParent)
+			mParent->copyAll (target, context);
+		for (PropertyMap::iterator it = mProperties.begin(); it != mProperties.end(); ++it)
+		{
+			std::string val = retrieveValue<StringValue>(it->second, this).get();
+			target->setProperty(it->first, sh::makeProperty(new sh::StringValue(val)));
+		}
+	}
+
+	void PropertySetGet::save(std::ofstream &stream, const std::string& indentation)
+	{
+		for (PropertyMap::iterator it = mProperties.begin(); it != mProperties.end(); ++it)
+		{
+			if (typeid( *(it->second) ) == typeid(LinkedValue))
+				stream << indentation << it->first << " " << "$" + static_cast<LinkedValue*>(&*(it->second))->_getStringValue() << '\n';
+			else
+				stream << indentation << it->first << " " << retrieveValue<StringValue>(it->second, this).get() << '\n';
+		}
+	}
 }

extern/shiny/Main/PropertyBase.hpp

@@ -133,6 +133,7 @@ namespace sh
 	class PropertySet
 	{
 	public:
+        virtual ~PropertySet() {}
 		void setProperty (const std::string& name, PropertyValuePtr& value, PropertySetGet* context);
 
 	protected:
@@ -151,18 +152,26 @@ namespace sh
 
 		virtual ~PropertySetGet() {}
 
-		void copyAll (PropertySet* target, PropertySetGet* context); ///< call setProperty for each property/value pair stored in \a this
+		void save (std::ofstream& stream, const std::string& indentation);
+
+		void copyAll (PropertySet* target, PropertySetGet* context, bool copyParent=true);
+		///< call setProperty for each property/value pair stored in \a this
+		void copyAll (PropertySetGet* target, PropertySetGet* context, bool copyParent=true);
+		///< call setProperty for each property/value pair stored in \a this
 
 		void setParent (PropertySetGet* parent);
+		PropertySetGet* getParent () { return mParent; }
 		void setContext (PropertySetGet* context);
 		PropertySetGet* getContext();
 
 		virtual void setProperty (const std::string& name, PropertyValuePtr value);
 		PropertyValuePtr& getProperty (const std::string& name);
 
+		void deleteProperty (const std::string& name);
+
 		const PropertyMap& listProperties() { return mProperties; }
 
-		bool hasProperty (const std::string& name);
+		bool hasProperty (const std::string& name) const;
 
 	private:
 		PropertyMap mProperties;
@@ -225,7 +234,7 @@ namespace sh
 
 	template <typename T>
 	/// Create a property of any type
-	/// Example: sh::makeProperty\<sh::Vector4\> (new sh::Vector4(1, 1, 1, 1))
+	/// Example: sh::makeProperty (new sh::Vector4(1, 1, 1, 1))
 	inline PropertyValuePtr makeProperty (T* p)
 	{
 		return PropertyValuePtr ( static_cast<PropertyValue*>(p) );

extern/shiny/Main/ScriptLoader.cpp

@@ -24,6 +24,10 @@ namespace sh
 	}
 
 	ScriptLoader::ScriptLoader(const std::string& fileEnding)
+		: mLoadOrder(0)
+		, mToken(TOKEN_NewLine)
+		, mLastToken(TOKEN_NewLine)
+
 	{
 		mFileEnding = fileEnding;
 	}
@@ -36,7 +40,7 @@ namespace sh
 	void ScriptLoader::clearScriptList()
 	{
 		std::map <std::string, ScriptNode *>::iterator i;
-		for (i = m_scriptList.begin(); i != m_scriptList.end(); i++)
+		for (i = m_scriptList.begin(); i != m_scriptList.end(); ++i)
 		{
 			delete i->second;
 		}
@@ -293,7 +297,7 @@ namespace sh
 	{
 		//Delete all children
 		std::vector<ScriptNode*>::iterator i;
-		for (i = mChildren.begin(); i != mChildren.end(); i++)
+		for (i = mChildren.begin(); i != mChildren.end(); ++i)
 		{
 			ScriptNode *node = *i;
 			node->mRemoveSelf = false;
@@ -323,15 +327,24 @@ namespace sh
 
 	ScriptNode *ScriptNode::findChild(const std::string &name, bool recursive)
 	{
-		int indx, prevC, nextC;
+		int indx;
 		int childCount = (int)mChildren.size();
 
 		if (mLastChildFound != -1)
 		{
 			//If possible, try checking the nodes neighboring the last successful search
 			//(often nodes searched for in sequence, so this will boost search speeds).
-			prevC = mLastChildFound-1; if (prevC < 0) prevC = 0; else if (prevC >= childCount) prevC = childCount-1;
-			nextC = mLastChildFound+1; if (nextC < 0) nextC = 0; else if (nextC >= childCount) nextC = childCount-1;
+			int prevC = mLastChildFound-1;
+			if (prevC < 0)
+				prevC = 0;
+			else if (prevC >= childCount)
+				prevC = childCount-1;
+			int nextC = mLastChildFound+1;
+			if (nextC < 0)
+				nextC = 0;
+			else if (nextC >= childCount)
+				nextC = childCount-1;
+
 			for (indx = prevC; indx <= nextC; ++indx)
 			{
 				ScriptNode *node = mChildren[indx];

extern/shiny/Main/ShaderSet.cpp

@@ -37,6 +37,14 @@ namespace sh
 		parse();
 	}
 
+	ShaderSet::~ShaderSet()
+	{
+		for (ShaderInstanceMap::iterator it = mInstances.begin(); it != mInstances.end(); ++it)
+		{
+			sh::Factory::getInstance().getPlatform()->destroyGpuProgram(it->second.getName());
+		}
+	}
+
 	void ShaderSet::parse()
 	{
 		std::string currentToken;

extern/shiny/Main/ShaderSet.hpp

@@ -21,6 +21,7 @@ namespace sh
 	public:
 		ShaderSet (const std::string& type, const std::string& cgProfile, const std::string& hlslProfile, const std::string& sourceFile, const std::string& basePath,
 				   const std::string& name, PropertySetGet* globalSettingsPtr);
+		~ShaderSet();
 
 		/// Retrieve a shader instance for the given properties. \n
 		/// If a \a ShaderInstance with the same properties exists already, simply returns this instance. \n

extern/shiny/Platforms/Ogre/OgreMaterial.cpp

@@ -15,6 +15,7 @@ namespace sh
 	OgreMaterial::OgreMaterial (const std::string& name, const std::string& resourceGroup)
 		: Material()
 	{
+		mName = name;
 		assert (Ogre::MaterialManager::getSingleton().getByName(name).isNull() && "Material already exists");
 		mMaterial = Ogre::MaterialManager::getSingleton().create (name, resourceGroup);
 		mMaterial->removeAllTechniques();
@@ -22,8 +23,21 @@ namespace sh
 		mMaterial->compile();
 	}
 
+	void OgreMaterial::ensureLoaded()
+	{
+		if (mMaterial.isNull())
+			mMaterial = Ogre::MaterialManager::getSingleton().getByName(mName);
+	}
+
+	bool OgreMaterial::isUnreferenced()
+	{
+		// Resource system internals hold 3 shared pointers, we hold one, so usecount of 4 means unused
+		return (!mMaterial.isNull() && mMaterial.useCount() <= Ogre::ResourceGroupManager::RESOURCE_SYSTEM_NUM_REFERENCE_COUNTS+1);
+	}
+
 	OgreMaterial::~OgreMaterial()
 	{
+		if (!mMaterial.isNull())
 			Ogre::MaterialManager::getSingleton().remove(mMaterial->getName());
 	}
 
@@ -34,6 +48,8 @@ namespace sh
 
 	void OgreMaterial::removeAll ()
 	{
+		if (mMaterial.isNull())
+			return;
 		mMaterial->removeAllTechniques();
 		mMaterial->createTechnique()->setSchemeName (sDefaultTechniqueName);
 		mMaterial->compile();

extern/shiny/Platforms/Ogre/OgreMaterial.hpp

@@ -18,6 +18,9 @@ namespace sh
 		virtual boost::shared_ptr<Pass> createPass (const std::string& configuration, unsigned short lodIndex);
 		virtual bool createConfiguration (const std::string& name, unsigned short lodIndex);
 
+		virtual bool isUnreferenced();
+		virtual void ensureLoaded();
+
 		virtual void removeAll ();
 
 		Ogre::MaterialPtr getOgreMaterial();
@@ -30,6 +33,7 @@ namespace sh
 
 	private:
 		Ogre::MaterialPtr mMaterial;
+		std::string mName;
 
 		std::string mShadowCasterMaterial;
 	};

extern/shiny/Platforms/Ogre/OgrePass.cpp

@@ -20,9 +20,9 @@ namespace sh
 		mPass = t->createPass();
 	}
 
-	boost::shared_ptr<TextureUnitState> OgrePass::createTextureUnitState ()
+	boost::shared_ptr<TextureUnitState> OgrePass::createTextureUnitState (const std::string& name)
 	{
-		return boost::shared_ptr<TextureUnitState> (new OgreTextureUnitState (this));
+		return boost::shared_ptr<TextureUnitState> (new OgreTextureUnitState (this, name));
 	}
 
 	void OgrePass::assignProgram (GpuProgramType type, const std::string& name)
@@ -105,8 +105,18 @@ namespace sh
 		else if (type == GPT_Fragment)
 			params = mPass->getFragmentProgramParameters();
 
+		try
+		{
 			params->addSharedParameters (name);
 		}
+		catch (Ogre::Exception& e)
+		{
+			std::stringstream msg;
+			msg << "Could not create a shared parameter instance for '"
+				   << name << "'. Make sure this shared parameter has a value set (via Factory::setSharedParameter)!";
+			throw std::runtime_error(msg.str());
+		}
+	}
 
 	void OgrePass::setTextureUnitIndex (int programType, const std::string& name, int index)
 	{

extern/shiny/Platforms/Ogre/OgrePass.hpp

@@ -14,7 +14,7 @@ namespace sh
 	public:
 		OgrePass (OgreMaterial* parent, const std::string& configuration, unsigned short lodIndex);
 
-		virtual boost::shared_ptr<TextureUnitState> createTextureUnitState ();
+		virtual boost::shared_ptr<TextureUnitState> createTextureUnitState (const std::string& name);
 		virtual void assignProgram (GpuProgramType type, const std::string& name);
 
 		Ogre::Pass* getOgrePass();

extern/shiny/Platforms/Ogre/OgrePlatform.cpp

@@ -4,6 +4,7 @@
 
 #include <OgreDataStream.h>
 #include <OgreGpuProgramManager.h>
+#include <OgreHighLevelGpuProgramManager.h>
 #include <OgreRoot.h>
 
 #include "OgreMaterial.hpp"
@@ -76,6 +77,11 @@ namespace sh
 		return boost::shared_ptr<Material> (material);
 	}
 
+	void OgrePlatform::destroyGpuProgram(const std::string &name)
+	{
+		Ogre::HighLevelGpuProgramManager::getSingleton().remove(name);
+	}
+
 	boost::shared_ptr<GpuProgram> OgrePlatform::createGpuProgram (
 		GpuProgramType type,
 		const std::string& compileArguments,
@@ -122,6 +128,7 @@ namespace sh
 		if (mSharedParameters.find(name) == mSharedParameters.end())
 		{
 			params = Ogre::GpuProgramManager::getSingleton().createSharedParameters(name);
+
 			Ogre::GpuConstantType type;
 			if (typeid(*value) == typeid(Vector4))
 				type = Ogre::GCT_FLOAT4;

extern/shiny/Platforms/Ogre/OgrePlatform.hpp

@@ -47,6 +47,8 @@ namespace sh
 			const std::string& name, const std::string& profile,
 			const std::string& source, Language lang);
 
+		virtual void destroyGpuProgram (const std::string& name);
+
 		virtual void setSharedParameter (const std::string& name, PropertyValuePtr value);
 
 		friend class ShaderInstance;

extern/shiny/Platforms/Ogre/OgreTextureUnitState.cpp

@@ -6,10 +6,11 @@
 
 namespace sh
 {
-	OgreTextureUnitState::OgreTextureUnitState (OgrePass* parent)
+	OgreTextureUnitState::OgreTextureUnitState (OgrePass* parent, const std::string& name)
 		: TextureUnitState()
 	{
 		mTextureUnitState = parent->getOgrePass()->createTextureUnitState("");
+		mTextureUnitState->setName(name);
 	}
 
 	bool OgreTextureUnitState::setPropertyOverride (const std::string &name, PropertyValuePtr& value, PropertySetGet* context)

extern/shiny/Platforms/Ogre/OgreTextureUnitState.hpp

@@ -12,7 +12,7 @@ namespace sh
 	class OgreTextureUnitState : public TextureUnitState
 	{
 	public:
-		OgreTextureUnitState (OgrePass* parent);
+		OgreTextureUnitState (OgrePass* parent, const std::string& name);
 
 		virtual void setTextureName (const std::string& textureName);