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