Engine directory for ticket #1

Engine/source/shaderGen/featureMgr.h

@@ -0,0 +1,89 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) 2012 GarageGames, LLC
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//-----------------------------------------------------------------------------
+#ifndef _FEATUREMGR_H_
+#define _FEATUREMGR_H_
+
+#ifndef _TSINGLETON_H_
+#include "core/util/tSingleton.h"
+#endif 
+#ifndef _TVECTOR_H_
+#include "core/util/tVector.h"
+#endif 
+
+class FeatureType;
+class ShaderFeature;
+
+/// Used by the feature manager.
+struct FeatureInfo
+{
+   const FeatureType *type;
+   ShaderFeature *feature;
+};
+
+
+///
+class FeatureMgr
+{
+protected:
+
+   bool mNeedsSort;
+
+   typedef Vector<FeatureInfo> FeatureInfoVector;
+
+   FeatureInfoVector mFeatures;
+
+   static S32 QSORT_CALLBACK _featureInfoCompare( const FeatureInfo *a, const FeatureInfo *b );
+
+public:
+   
+   FeatureMgr();
+   ~FeatureMgr();
+
+   /// Returns the count of registered features.
+   U32 getFeatureCount() const { return mFeatures.size(); }
+
+   /// Returns the feature info at the index.
+   const FeatureInfo& getAt( U32 index );
+
+   /// 
+   ShaderFeature* getByType( const FeatureType &type );
+
+   // Allows other systems to add features.  index is 
+   // the enum in GFXMaterialFeatureData.
+   void registerFeature(   const FeatureType &type, 
+                           ShaderFeature *feature );
+
+   // Unregister a feature.
+   void unregisterFeature( const FeatureType &type );
+
+
+   /// Removes all features.
+   void unregisterAll();
+
+   // For ManagedSingleton.
+   static const char* getSingletonName() { return "FeatureMgr"; }   
+};
+
+// Helper for accessing the feature manager singleton.
+#define FEATUREMGR ManagedSingleton<FeatureMgr>::instance()
+
+#endif // FEATUREMGR