src/Scenery/SceneryPager.cxx

   1 // SceneryPager.cxx -- 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 #ifdef HAVE_CONFIG_H
  20 #  include <config.h>
  21 #endif
  22
  23 #include <simgear/scene/model/SGPagedLOD.hxx>
  24 #include <simgear/math/SGMath.hxx>
  25 #include "SceneryPager.hxx"
  26 #include <algorithm>
  27 #include <functional>
  28
  29 using namespace osg;
  30 using namespace flightgear;
  31
  32 SceneryPager::SceneryPager()
  33 {
  34     _pagerRequests.reserve(48);
  35     _deleteRequests.reserve(16);
  36     setExpiryDelay(120.0);
  37 }
  38
  39 SceneryPager::SceneryPager(const SceneryPager& rhs) :
  40     DatabasePager(rhs)
  41 {
  42 }
  43
  44 SceneryPager::~SceneryPager()
  45 {
  46 }
  47
  48 void SceneryPager::requestNodeFile(const std::string& fileName, Group* group,
  49                                    float priority, const FrameStamp* framestamp,
  50                                    ref_ptr<Referenced>& databaseRequest,
  51 #if SG_OSG_MIN_VERSION_REQUIRED(2,9,5)
  52                                    const osg::Referenced* options
  53 #else
  54                                    osgDB::ReaderWriter::Options* options
  55 #endif
  56                                    )
  57 {
  58     simgear::SGPagedLOD *sgplod = dynamic_cast<simgear::SGPagedLOD*>(group);
  59     if(sgplod)
  60         DatabasePager::requestNodeFile(fileName, group, priority, framestamp,
  61                                        databaseRequest,
  62                                        sgplod->getReaderWriterOptions());
  63     else
  64         DatabasePager::requestNodeFile(fileName, group, priority, framestamp,
  65                                        databaseRequest,
  66                                        options);
  67 }
  68
  69 void SceneryPager::queueRequest(const std::string& fileName, Group* group,
  70                                 float priority, FrameStamp* frameStamp,
  71                                 ref_ptr<Referenced>& databaseRequest,
  72                                 osgDB::ReaderWriter::Options* options)
  73 {
  74     _pagerRequests.push_back(PagerRequest(fileName, group, priority,
  75                                           frameStamp,
  76                                           databaseRequest,
  77                                           options));
  78 }
  79
  80 void SceneryPager::queueDeleteRequest(osg::ref_ptr<osg::Object>& objptr)
  81 {
  82     _deleteRequests.push_back(objptr);
  83     objptr = 0;
  84 }
  85 void SceneryPager::signalEndFrame()
  86 {
  87     using namespace std;
  88     bool areDeleteRequests = false;
  89     bool arePagerRequests = false;
  90     if (!_deleteRequests.empty()) {
  91         areDeleteRequests = true;
  92         OpenThreads::ScopedLock<OpenThreads::Mutex>
  93             lock(_fileRequestQueue->_childrenToDeleteListMutex);
  94         ObjectList& deleteList = _fileRequestQueue->_childrenToDeleteList;
  95         deleteList.insert(deleteList.end(),
  96                           _deleteRequests.begin(),
  97                           _deleteRequests.end());
  98         _deleteRequests.clear();
  99     }
 100     if (!_pagerRequests.empty()) {
 101         arePagerRequests = true;
 102         for_each(_pagerRequests.begin(), _pagerRequests.end(),
 103                  bind2nd(mem_fun_ref(&PagerRequest::doRequest), this));
 104         _pagerRequests.clear();
 105     }
 106     if (areDeleteRequests && !arePagerRequests) {
 107         _fileRequestQueue->updateBlock();
 108     }
 109     DatabasePager::signalEndFrame();
 110 }
 111