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 osg;
  25 using namespace flightgear;
  26
  27 SceneryPager::SceneryPager()
  28 {
  29     _pagerRequests.reserve(48);
  30     _deleteRequests.reserve(16);
  31     setExpiryDelay(120.0);
  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, Group* group,
  44                                    float priority,
  45                                    const FrameStamp* framestamp
  46 #ifdef FGOSGPAGER25
  47                                    , ref_ptr<Referenced>& databaseRequest
  48 #endif
  49     )
  50 {
  51     simgear::SGPagedLOD *sgplod = dynamic_cast<simgear::SGPagedLOD*>(group);
  52     if(sgplod)
  53         DatabasePager::requestNodeFile(fileName, group, priority, framestamp,
  54 #ifdef FGOSGPAGER25
  55                                        databaseRequest,
  56 #endif
  57                                        sgplod->getReaderWriterOptions());
  58     else
  59         DatabasePager::requestNodeFile(fileName, group, priority, framestamp
  60 #ifdef FGOSGPAGER25
  61                                        , databaseRequest
  62 #endif
  63             );
  64 }
  65
  66 void SceneryPager::queueRequest(const std::string& fileName, Group* group,
  67                                 float priority, FrameStamp* frameStamp,
  68 #ifdef FGOSGPAGER25
  69                                 ref_ptr<Referenced>& databaseRequest,
  70 #endif
  71                                 osgDB::ReaderWriter::Options* options)
  72 {
  73     _pagerRequests.push_back(PagerRequest(fileName, group, priority,
  74                                           frameStamp,
  75 #ifdef FGOSGPAGER25
  76                                           databaseRequest,
  77 #endif
  78                                           options));
  79 }
  80
  81 void SceneryPager::queueDeleteRequest(osg::ref_ptr<osg::Object>& objptr)
  82 {
  83     _deleteRequests.push_back(objptr);
  84     objptr = 0;
  85 }
  86 void SceneryPager::signalEndFrame()
  87 {
  88     using namespace std;
  89     bool areDeleteRequests = false;
  90     bool arePagerRequests = false;
  91     if (!_deleteRequests.empty()) {
  92         areDeleteRequests = true;
  93 #ifdef FGOSGPAGER25
  94         OpenThreads::ScopedLock<OpenThreads::Mutex>
  95             lock(_fileRequestQueue->_childrenToDeleteListMutex);
  96         ObjectList& deleteList = _fileRequestQueue->_childrenToDeleteList;
  97 #else
  98         OpenThreads::ScopedLock<OpenThreads::Mutex>
  99             lock(_childrenToDeleteListMutex);
 100         ObjectList& deleteList = _childrenToDeleteList;
 101 #endif
 102         deleteList.insert(deleteList.end(),
 103                           _deleteRequests.begin(),
 104                           _deleteRequests.end());
 105         _deleteRequests.clear();
 106     }
 107     if (!_pagerRequests.empty()) {
 108         arePagerRequests = true;
 109         for_each(_pagerRequests.begin(), _pagerRequests.end(),
 110                  bind2nd(mem_fun_ref(&PagerRequest::doRequest), this));
 111         _pagerRequests.clear();
 112     }
 113     if (areDeleteRequests && !arePagerRequests) {
 114 #ifdef FGOSGPAGER25
 115         _fileRequestQueue->updateBlock();
 116 #else
 117         updateDatabasePagerThreadBlock();
 118 #endif
 119     }
 120     DatabasePager::signalEndFrame();
 121 }
 122