1 // SceneryPager.hxx -- Interface to OSG database pager
3 // Copyright (C) 2007 Tim Moore timoore@redhat.com
5 // This program is free software; you can redistribute it and/or
6 // modify it under the terms of the GNU General Public License as
7 // published by the Free Software Foundation; either version 2 of the
8 // License, or (at your option) any later version.
10 // This program is distributed in the hope that it will be useful, but
11 // WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 // General Public License for more details.
15 // You should have received a copy of the GNU General Public License
16 // along with this program; if not, write to the Free Software
17 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
21 #ifndef FLIGHTGEAR_SCENERYPAGERHXX
22 #define FLIGHTGEAR_SCENERYPAGERHXX 1
26 #include <osg/FrameStamp>
28 #include <osgDB/DatabasePager>
30 #include <simgear/structure/OSGVersion.hxx>
31 #include <simgear/scene/model/SGPagedLOD.hxx>
35 class SceneryPager : public osgDB::DatabasePager
39 SceneryPager(const SceneryPager& rhs);
40 // Unhide DatabasePager::requestNodeFile
41 using osgDB::DatabasePager::requestNodeFile;
42 // reimplement to add readerWriterOptions from SGPagedLOD
43 #if SG_PAGEDLOD_HAS_OPTIONS
45 virtual void requestNodeFile(const std::string& fileName, osg::Group* group,
47 const osg::FrameStamp* framestamp,
48 osg::ref_ptr<osg::Referenced>& databaseRequest,
49 osgDB::ReaderWriter::Options* options);
51 void queueRequest(const std::string& fileName, osg::Group* node,
52 float priority, osg::FrameStamp* frameStamp,
53 osg::ref_ptr<osg::Referenced>& databaseRequest,
54 osgDB::ReaderWriter::Options* options);
55 // This is passed a ref_ptr so that it can "take ownership" of the
56 // node to delete and decrement its refcount while holding the
57 // lock on the delete list.
58 void queueDeleteRequest(osg::ref_ptr<osg::Object>& objptr);
59 virtual void signalEndFrame();
61 // Queue up file requests until the end of the frame
64 PagerRequest() : _priority(0.0f), _databaseRequest(0) {}
65 PagerRequest(const PagerRequest& rhs) :
66 _fileName(rhs._fileName), _group(rhs._group),
67 _priority(rhs._priority), _frameStamp(rhs._frameStamp),
68 _options(rhs._options), _databaseRequest(rhs._databaseRequest) {}
70 PagerRequest(const std::string& fileName, osg::Group* group,
71 float priority, osg::FrameStamp* frameStamp,
72 osg::ref_ptr<Referenced>& databaseRequest,
73 osgDB::ReaderWriter::Options* options):
74 _fileName(fileName), _group(group), _priority(priority),
75 _frameStamp(frameStamp), _options(options),
76 _databaseRequest(&databaseRequest)
79 void doRequest(SceneryPager* pager);
80 std::string _fileName;
81 osg::ref_ptr<osg::Group> _group;
83 osg::ref_ptr<osg::FrameStamp> _frameStamp;
84 osg::ref_ptr<osgDB::ReaderWriter::Options> _options;
85 osg::ref_ptr<osg::Referenced>* _databaseRequest;
87 typedef std::vector<PagerRequest> PagerRequestList;
88 PagerRequestList _pagerRequests;
89 typedef std::vector<osg::ref_ptr<osg::Object> > DeleteRequestList;
90 DeleteRequestList _deleteRequests;
91 virtual ~SceneryPager();