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, const FrameStamp* framestamp,
  45                                    ref_ptr<Referenced>& databaseRequest,
  46 #if SG_OSG_MIN_VERSION_REQUIRED(2,9,5)
  47                                    const osg::Referenced* options
  48 #else
  49                                    osgDB::ReaderWriter::Options* options
  50 #endif
  51                                    )
  52 {
  53     simgear::SGPagedLOD *sgplod = dynamic_cast<simgear::SGPagedLOD*>(group);
  54     if(sgplod)
  55         DatabasePager::requestNodeFile(fileName, group, priority, framestamp,
  56                                        databaseRequest,
  57                                        sgplod->getReaderWriterOptions());
  58     else
  59         DatabasePager::requestNodeFile(fileName, group, priority, framestamp,
  60                                        databaseRequest,
  61                                        options);
  62 }
  63
  64 void SceneryPager::queueRequest(const std::string& fileName, Group* group,
  65                                 float priority, FrameStamp* frameStamp,
  66                                 ref_ptr<Referenced>& databaseRequest,
  67                                 osgDB::ReaderWriter::Options* options)
  68 {
  69     _pagerRequests.push_back(PagerRequest(fileName, group, priority,
  70                                           frameStamp,
  71                                           databaseRequest,
  72                                           options));
  73 }
  74
  75 void SceneryPager::queueDeleteRequest(osg::ref_ptr<osg::Object>& objptr)
  76 {
  77     _deleteRequests.push_back(objptr);
  78     objptr = 0;
  79 }
  80 void SceneryPager::signalEndFrame()
  81 {
  82     using namespace std;
  83     bool areDeleteRequests = false;
  84     bool arePagerRequests = false;
  85     if (!_deleteRequests.empty()) {
  86         areDeleteRequests = true;
  87         OpenThreads::ScopedLock<OpenThreads::Mutex>
  88             lock(_fileRequestQueue->_childrenToDeleteListMutex);
  89         ObjectList& deleteList = _fileRequestQueue->_childrenToDeleteList;
  90         deleteList.insert(deleteList.end(),
  91                           _deleteRequests.begin(),
  92                           _deleteRequests.end());
  93         _deleteRequests.clear();
  94     }
  95     if (!_pagerRequests.empty()) {
  96         arePagerRequests = true;
  97         for_each(_pagerRequests.begin(), _pagerRequests.end(),
  98                  bind2nd(mem_fun_ref(&PagerRequest::doRequest), this));
  99         _pagerRequests.clear();
 100     }
 101     if (areDeleteRequests && !arePagerRequests) {
 102         _fileRequestQueue->updateBlock();
 103     }
 104     DatabasePager::signalEndFrame();
 105 }
 106