/usr/include/osgEarthFeatures/FeatureSourceIndexNode is in libosgearth-dev 2.7.0+dfsg-2+b3.
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/* osgEarth - Dynamic map generation toolkit for OpenSceneGraph
* Copyright 2015 Pelican Mapping
* http://osgearth.org
*
* osgEarth is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*/
#ifndef OSGEARTHFEATURES_FEATURE_SOURCE_INDEX_NODE_H
#define OSGEARTHFEATURES_FEATURE_SOURCE_INDEX_NODE_H 1
#include <osgEarthFeatures/Common>
#include <osgEarthFeatures/Feature>
#include <osgEarthFeatures/FeatureIndex>
#include <osgEarthFeatures/FeatureSource>
#include <osgEarth/ObjectIndex>
#include <osg/Config>
#include <osg/Group>
#include <osg/Drawable>
#include <map>
#include <set>
namespace osgEarth { namespace Features
{
using namespace osgEarth;
/**
* Options for a feature index
*/
class OSGEARTHFEATURES_EXPORT FeatureSourceIndexOptions
{
public:
FeatureSourceIndexOptions(const Config& conf =Config());
/** Whether indexing is enabled. */
optional<bool>& enabled() { return _enabled; }
const optional<bool>& enabled() const { return _enabled; }
/** Whether to embed the actual Feature objects in the index (instead of
* just the FeatureID). This is useful for feature sources that cannot
* be queried by ID (e.g., streaming data like TFS) */
optional<bool>& embedFeatures() { return _embedFeatures; }
const optional<bool>& embedFeatures() const { return _embedFeatures; }
public:
Config getConfig() const;
private:
optional<bool> _enabled;
optional<bool> _embedFeatures;
};
struct RefIDPair : public osg::Referenced
{
RefIDPair(FeatureID fid, ObjectID oid) : _fid(fid), _oid(oid) { }
FeatureID _fid;
ObjectID _oid;
};
/**
* Internal class that maintains a feature index for a single feature source.
* Internal - not exported!
*/
class OSGEARTHFEATURES_EXPORT FeatureSourceIndex : public FeatureIndex
{
public:
FeatureSourceIndex(FeatureSource* source,
ObjectIndex* masterIndex,
const FeatureSourceIndexOptions& options);
/** FeatureSource behind this index */
FeatureSource* getFeatureSource() { return _featureSource.get(); }
public: // FeatureIndex
Feature* getFeature(ObjectID oid) const;
int size() const { return _fids.size(); }
public: // Functions called by FeatureSourceIndexNode
RefIDPair* tagDrawable (osg::Drawable* drawable, Feature* feature);
RefIDPair* tagAllDrawables(osg::Node* node, Feature* feature);
RefIDPair* tagNode (osg::Node* node, Feature* feature);
// removes a collection of FIDs from the index. If the refcount goes to zero,
// remove it from the master index as well.
template<typename InputIter>
void removeFIDs(InputIter first, InputIter last)
{
Threading::ScopedMutexLock lock(_mutex);
for(InputIter fid = first; fid != last; ++fid )
{
FIDMap::iterator f = _fids.find( *fid );
if ( f != _fids.end() && f->second->referenceCount() == 1 )
{
ObjectID oid = f->second->_oid;
_oids.erase( oid );
_fids.erase( f );
_embeddedFeatures.erase( *fid );
if ( _masterIndex.valid() )
_masterIndex->remove( oid );
}
}
}
public: // types
typedef std::map<ObjectID, FeatureID> OIDMap;
typedef std::map<FeatureID, osg::ref_ptr<RefIDPair> > FIDMap;
typedef std::map<FeatureID, osg::ref_ptr<Feature> > FeatureMap;
protected:
virtual ~FeatureSourceIndex();
private:
osg::ref_ptr<FeatureSource> _featureSource;
osg::ref_ptr<ObjectIndex> _masterIndex;
FeatureSourceIndexOptions _options;
bool _embed;
mutable Threading::Mutex _mutex;
OIDMap _oids;
FIDMap _fids;
FeatureMap _embeddedFeatures;
};
/**
* Node that houses a FeatureSourceIndex, so that it can un-register index
* entries when it pages out.
*/
class OSGEARTHFEATURES_EXPORT FeatureSourceIndexNode : public osg::Group,
public FeatureIndexBuilder
{
public:
FeatureSourceIndexNode(FeatureSourceIndex* index);
/** The index referenced by this node. */
FeatureSourceIndex* getIndex() { return _index.get(); }
/** Fetches the entire set of FIDs registered with the index by this node. */
bool getAllFIDs(std::vector<FeatureID>& output) const;
public: // FeatureIndexBuilder
ObjectID tagDrawable (osg::Drawable* drawable, Feature* feature);
ObjectID tagAllDrawables(osg::Node* node, Feature* feature);
ObjectID tagNode (osg::Node* node, Feature* feature);
protected:
/** dtor - unregisters any FIDs added by this node. */
virtual ~FeatureSourceIndexNode();
private:
typedef std::map<FeatureID, osg::ref_ptr<RefIDPair> > FIDMap;
osg::ref_ptr<FeatureSourceIndex> _index;
FIDMap _fids;
public:
virtual const char* className() const { return "FeatureSourceIndexNode"; }
virtual const char* libraryName() const { return "osgEarthFeatures"; }
};
} } // namespace osgEarth::Features
#endif // OSGEARTHFEATURES_FEATURE_SOURCE_INDEX_NODE_H
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