1 // SceneryPager.cxx -- 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.
23 #include <simgear/math/SGMath.hxx>
24 #include "SceneryPager.hxx"
29 using namespace flightgear;
31 SceneryPager::SceneryPager()
33 _pagerRequests.reserve(48);
34 _deleteRequests.reserve(16);
37 SceneryPager::SceneryPager(const SceneryPager& rhs) :
42 SceneryPager::~SceneryPager()
46 void SceneryPager::queueRequest(const std::string& fileName, Group* group,
47 float priority, FrameStamp* frameStamp,
48 ref_ptr<Referenced>& databaseRequest,
49 osgDB::ReaderWriter::Options* options)
51 _pagerRequests.push_back(PagerRequest(fileName, group, priority,
57 void SceneryPager::queueDeleteRequest(osg::ref_ptr<osg::Object>& objptr)
59 _deleteRequests.push_back(objptr);
63 // Work around interface change in
64 // osgDB::DatabasePager::requestNodeFile
69 NodePathProxy(NodePath& nodePath)
73 operator Group* () { return static_cast<Group*>(_nodePath.back()); }
74 operator NodePath& () { return _nodePath; }
79 void SceneryPager::PagerRequest::doRequest(SceneryPager* pager)
81 if (_group->getNumChildren() == 0) {
83 path.push_back(_group.get());
84 pager->requestNodeFile(_fileName, NodePathProxy(path), _priority,
91 void SceneryPager::signalEndFrame()
94 bool areDeleteRequests = false;
95 bool arePagerRequests = false;
96 if (!_deleteRequests.empty()) {
97 areDeleteRequests = true;
98 OpenThreads::ScopedLock<OpenThreads::Mutex>
99 lock(_fileRequestQueue->_childrenToDeleteListMutex);
100 ObjectList& deleteList = _fileRequestQueue->_childrenToDeleteList;
101 deleteList.insert(deleteList.end(),
102 _deleteRequests.begin(),
103 _deleteRequests.end());
104 _deleteRequests.clear();
106 if (!_pagerRequests.empty()) {
107 arePagerRequests = true;
108 for_each(_pagerRequests.begin(), _pagerRequests.end(),
109 bind2nd(mem_fun_ref(&PagerRequest::doRequest), this));
110 _pagerRequests.clear();
112 if (areDeleteRequests && !arePagerRequests) {
113 _fileRequestQueue->updateBlock();
115 DatabasePager::signalEndFrame();