Engine directory for ticket #1

Engine/source/shaderGen/featureMgr.cpp

@@ -0,0 +1,143 @@
+//-----------------------------------------------------------------------------
+// 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.
+//-----------------------------------------------------------------------------
+
+#include "platform/platform.h"
+#include "shaderGen/featureMgr.h"
+
+#include "shaderGen/featureType.h"
+#include "shaderGen/shaderFeature.h"
+#include "core/util/safeDelete.h"
+#include "core/module.h"
+
+
+MODULE_BEGIN( ShaderGenFeatureMgr )
+
+   MODULE_INIT_BEFORE( ShaderGen )
+   MODULE_SHUTDOWN_AFTER( Sim ) // allow registered features to be removed before destroying singleton
+
+   MODULE_INIT
+   {
+      ManagedSingleton< FeatureMgr >::createSingleton();
+   }
+   
+   MODULE_SHUTDOWN
+   {
+      ManagedSingleton< FeatureMgr >::deleteSingleton();
+   }
+
+MODULE_END;
+
+
+FeatureMgr::FeatureMgr()
+   : mNeedsSort( false )
+{
+   VECTOR_SET_ASSOCIATION( mFeatures );
+}
+
+FeatureMgr::~FeatureMgr()
+{
+   unregisterAll();
+}
+
+void FeatureMgr::unregisterAll()
+{
+   FeatureInfoVector::iterator iter = mFeatures.begin();
+   for ( ; iter != mFeatures.end(); iter++ )
+   {
+      if ( iter->feature )
+         delete iter->feature;
+   }
+
+   mFeatures.clear();
+   mNeedsSort = false;
+}
+
+const FeatureInfo& FeatureMgr::getAt( U32 index )
+{
+   if ( mNeedsSort )
+   {
+      mFeatures.sort( _featureInfoCompare );
+      mNeedsSort = false;
+   }
+
+   AssertFatal( index < mFeatures.size(), "FeatureMgr::getAt() - Index out of range!" );
+
+   return mFeatures[index];
+}
+
+ShaderFeature* FeatureMgr::getByType( const FeatureType &type )
+{
+   FeatureInfoVector::iterator iter = mFeatures.begin();
+   for ( ; iter != mFeatures.end(); iter++ )
+   {
+      if ( *iter->type == type )
+         return iter->feature;
+   }
+
+   return NULL;
+}
+
+void FeatureMgr::registerFeature(   const FeatureType &type, 
+                                    ShaderFeature *feature )
+{
+   // Remove any existing feature first.
+   unregisterFeature( type );
+
+   // Now add the new feature.
+   mFeatures.increment();
+   mFeatures.last().type = &type;
+   mFeatures.last().feature = feature;
+
+   // Make sure we resort the features.
+   mNeedsSort = true;
+}
+
+S32 QSORT_CALLBACK FeatureMgr::_featureInfoCompare( const FeatureInfo* a, const FeatureInfo* b )
+{
+   const FeatureType *typeA = a->type;
+   const FeatureType *typeB = b->type;
+
+   if ( typeA->getGroup() < typeB->getGroup() )
+      return -1;
+   else if ( typeA->getGroup() > typeB->getGroup() )
+      return 1;
+   else if ( typeA->getOrder() < typeB->getOrder() )
+      return -1;
+   else if ( typeA->getOrder() > typeB->getOrder() )
+      return 1;
+   else
+      return 0;
+}
+
+void FeatureMgr::unregisterFeature( const FeatureType &type )
+{
+   FeatureInfoVector::iterator iter = mFeatures.begin();
+   for ( ; iter != mFeatures.end(); iter++ )
+   {
+      if ( *iter->type != type )
+         continue;
+
+      delete iter->feature;
+      mFeatures.erase( iter );
+      return;
+   }
+}