src/Scenery/SceneryPager.cxx

   1 // SceneryPager.hxx -- Interface to OSG database pager
   2 //
   3 // Copyright (C) 2007 Tim Moore timoore@redhat.com
   4 //
   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.
   9 //
  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.
  14 //
  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.
  18
  19 #include <simgear/scene/model/SGPagedLOD.hxx>
  20 #include "SceneryPager.hxx"
  21 #include <algorithm>
  22 #include <functional>
  23
  24 using namespace flightgear;
  25 using osg::ref_ptr;
  26 using osg::Node;
  27
  28 SceneryPager::SceneryPager()
  29 {
  30     _pagerRequests.reserve(48);
  31     _deleteRequests.reserve(16);
  32 }
  33
  34 SceneryPager::SceneryPager(const SceneryPager& rhs) :
  35     DatabasePager(rhs)
  36 {
  37 }
  38
  39 SceneryPager::~SceneryPager()
  40 {
  41 }
  42
  43 void SceneryPager::requestNodeFile(const std::string& fileName,osg::Group* group,
  44                                     float priority, const osg::FrameStamp* framestamp)
  45 {
  46     simgear::SGPagedLOD *sgplod = dynamic_cast<simgear::SGPagedLOD*>(group);
  47     if(sgplod)
  48         DatabasePager::requestNodeFile(fileName,group,priority,framestamp,sgplod->getReaderWriterOptions());
  49     else
  50         DatabasePager::requestNodeFile(fileName,group,priority,framestamp);
  51 }
  52
  53 void SceneryPager::queueRequest(const std::string& fileName, osg::Group* group,
  54                                 float priority, osg::FrameStamp* frameStamp)
  55 {
  56     _pagerRequests.push_back(PagerRequest(fileName, group, priority,
  57                                           frameStamp));
  58 }
  59
  60 void SceneryPager::queueDeleteRequest(osg::ref_ptr<osg::Object>& objptr)
  61 {
  62     _deleteRequests.push_back(objptr);
  63     objptr = 0;
  64 }
  65 void SceneryPager::signalEndFrame()
  66 {
  67     using namespace std;
  68     bool areDeleteRequests = false;
  69     bool arePagerRequests = false;
  70     if (!_deleteRequests.empty()) {
  71         areDeleteRequests = true;
  72         OpenThreads::ScopedLock<OpenThreads::Mutex>
  73             lock(_childrenToDeleteListMutex);
  74         _childrenToDeleteList.insert(_childrenToDeleteList.end(),
  75                                      _deleteRequests.begin(),
  76                                      _deleteRequests.end());
  77         _deleteRequests.clear();
  78     }
  79     if (!_pagerRequests.empty()) {
  80         arePagerRequests = true;
  81         for_each(_pagerRequests.begin(), _pagerRequests.end(),
  82                  bind2nd(mem_fun_ref(&PagerRequest::doRequest), this));
  83         _pagerRequests.clear();
  84     }
  85     if (areDeleteRequests && !arePagerRequests)
  86         updateDatabasePagerThreadBlock();
  87     DatabasePager::signalEndFrame();
  88 }
  89