116 lines
4.2 KiB
C++
116 lines
4.2 KiB
C++
// SceneryPager.hxx -- Interface to OSG database pager
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//
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// Copyright (C) 2007 Tim Moore timoore@redhat.com
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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//
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// $Id$
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#ifndef FLIGHTGEAR_SCENERYPAGERHXX
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#include <string>
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#include <vector>
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#include <osg/FrameStamp>
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#include <osg/Group>
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#include <osgDB/DatabasePager>
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#include <simgear/structure/OSGVersion.hxx>
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// Pager request change in OpenSceneGraph 2.5.1
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#if SG_OSG_VERSION >= 25001
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#define FGOSGPAGER25
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#endif
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namespace flightgear
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{
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class SceneryPager : public osgDB::DatabasePager
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{
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public:
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SceneryPager();
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SceneryPager(const SceneryPager& rhs);
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// Unhide DatabasePager::requestNodeFile
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using osgDB::DatabasePager::requestNodeFile;
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// reimplement to add readerWriterOptions from SGPagedLOD
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virtual void requestNodeFile(const std::string& fileName, osg::Group* group,
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float priority,
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const osg::FrameStamp* framestamp
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#ifdef FGOSGPAGER25
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, osg::ref_ptr<osg::Referenced>&
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databaseRequest
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#endif
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);
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void queueRequest(const std::string& fileName, osg::Group* node,
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float priority, osg::FrameStamp* frameStamp,
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#ifdef FGOSGPAGER25
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osg::ref_ptr<osg::Referenced>& databaseRequest,
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#endif
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osgDB::ReaderWriter::Options* options);
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// This is passed a ref_ptr so that it can "take ownership" of the
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// node to delete and decrement its refcount while holding the
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// lock on the delete list.
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void queueDeleteRequest(osg::ref_ptr<osg::Object>& objptr);
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virtual void signalEndFrame();
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protected:
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// Queue up file requests until the end of the frame
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struct PagerRequest
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{
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PagerRequest() : _priority(0.0f), _databaseRequest(0) {}
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PagerRequest(const PagerRequest& rhs) :
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_fileName(rhs._fileName), _group(rhs._group),
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_priority(rhs._priority), _frameStamp(rhs._frameStamp),
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_options(rhs._options), _databaseRequest(rhs._databaseRequest) {}
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PagerRequest(const std::string& fileName, osg::Group* group,
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float priority, osg::FrameStamp* frameStamp,
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#ifdef FGOSGPAGER25
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osg::ref_ptr<Referenced>& databaseRequest,
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#endif
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osgDB::ReaderWriter::Options* options):
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_fileName(fileName), _group(group), _priority(priority),
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_frameStamp(frameStamp), _options(options),
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#ifdef FGOSGPAGER25
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_databaseRequest(&databaseRequest)
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#else
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_databaseRequest(0)
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#endif
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{}
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void doRequest(SceneryPager* pager)
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{
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if (_group->getNumChildren() == 0)
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pager->requestNodeFile(_fileName, _group.get(), _priority,
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_frameStamp.get(),
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#ifdef FGOSGPAGER25
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*_databaseRequest,
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#endif
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_options.get());
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}
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std::string _fileName;
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osg::ref_ptr<osg::Group> _group;
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float _priority;
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osg::ref_ptr<osg::FrameStamp> _frameStamp;
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osg::ref_ptr<osgDB::ReaderWriter::Options> _options;
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osg::ref_ptr<osg::Referenced>* _databaseRequest;
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};
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typedef std::vector<PagerRequest> PagerRequestList;
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PagerRequestList _pagerRequests;
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typedef std::vector<osg::ref_ptr<osg::Object> > DeleteRequestList;
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DeleteRequestList _deleteRequests;
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virtual ~SceneryPager();
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};
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}
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#define FLIGHTGEAR_SCENERYPAGERHXX 1
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#endif
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