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>
34 class SceneryPager : public osgDB::DatabasePager
38 SceneryPager(const SceneryPager& rhs);
39 // Unhide DatabasePager::requestNodeFile
40 using osgDB::DatabasePager::requestNodeFile;
41 void queueRequest(const std::string& fileName, osg::Group* node,
42 float priority, osg::FrameStamp* frameStamp,
43 osg::ref_ptr<osg::Referenced>& databaseRequest,
44 osgDB::ReaderWriter::Options* options);
45 // This is passed a ref_ptr so that it can "take ownership" of the
46 // node to delete and decrement its refcount while holding the
47 // lock on the delete list.
48 void queueDeleteRequest(osg::ref_ptr<osg::Object>& objptr);
49 virtual void signalEndFrame();
51 // Queue up file requests until the end of the frame
54 PagerRequest() : _priority(0.0f), _databaseRequest(0) {}
55 PagerRequest(const PagerRequest& rhs) :
56 _fileName(rhs._fileName), _group(rhs._group),
57 _priority(rhs._priority), _frameStamp(rhs._frameStamp),
58 _options(rhs._options), _databaseRequest(rhs._databaseRequest) {}
60 PagerRequest(const std::string& fileName, osg::Group* group,
61 float priority, osg::FrameStamp* frameStamp,
62 osg::ref_ptr<Referenced>& databaseRequest,
63 osgDB::ReaderWriter::Options* options):
64 _fileName(fileName), _group(group), _priority(priority),
65 _frameStamp(frameStamp), _options(options),
66 _databaseRequest(&databaseRequest)
69 void doRequest(SceneryPager* pager);
70 std::string _fileName;
71 osg::ref_ptr<osg::Group> _group;
73 osg::ref_ptr<osg::FrameStamp> _frameStamp;
74 osg::ref_ptr<osgDB::ReaderWriter::Options> _options;
75 osg::ref_ptr<osg::Referenced>* _databaseRequest;
77 typedef std::vector<PagerRequest> PagerRequestList;
78 PagerRequestList _pagerRequests;
79 typedef std::vector<osg::ref_ptr<osg::Object> > DeleteRequestList;
80 DeleteRequestList _deleteRequests;
81 virtual ~SceneryPager();