/usr/include/osgEarthDrivers/engine_mp/FileLocationCallback is in libosgearth-dev 2.7.0+dfsg-2+b3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 | /* -*-c++-*- */
/* osgEarth - Dynamic map generation toolkit for OpenSceneGraph
* Copyright 2015 Pelican Mapping
* http://osgearth.org
*
* osgEarth is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
* IN THE SOFTWARE.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*/
#ifndef OSGEARTH_ENGINE_OSGTERRAIN_FILE_LOCATION_CALLBACK_H
#define OSGEARTH_ENGINE_OSGTERRAIN_FILE_LOCATION_CALLBACK_H 1
#include "MPTerrainEngineNode"
#include <osg/Version>
#include <osgEarth/Export>
#define USE_FILELOCATIONCALLBACK 1
#if USE_FILELOCATIONCALLBACK
namespace osgEarth { namespace Drivers { namespace MPTerrainEngine
{
/**
* A database pager callback that determines if the given filename is cached or not
*/
class FileLocationCallback : public osgDB::FileLocationCallback
{
public:
FileLocationCallback() { }
/** dtor */
virtual ~FileLocationCallback() { }
Location fileLocation(const std::string& filename, const osgDB::Options* options)
{
Location result = REMOTE_FILE;
unsigned int lod, x, y, id;
sscanf(filename.c_str(), "%d/%d/%d.%d", &lod, &x, &y, &id);
osg::ref_ptr<MPTerrainEngineNode> engine;
MPTerrainEngineNode::getEngineByUID( (UID)id, engine );
if ( engine.valid() )
{
const osgEarth::Profile* profile = engine->getMap()->getProfile();
osgEarth::TileKey mapKey( lod, x, y, profile );
result = LOCAL_FILE;
MapFrame mapf( engine->getMap() );
for( unsigned i=0; i<4; ++i )
{
TileKey childKey = mapKey.createChildKey( i );
if ( !mapf.isCached( childKey ) )
{
result = REMOTE_FILE;
break;
}
}
}
//OE_NOTICE << (result?"REMOTE":"LOCAL") << " - " << filename << std::endl;
return result;
}
bool useFileCache() const { return false; }
};
} } } // namespace osgEarth::Drivers::MPTerrainEngine
#endif // USE_FILELOCATIONCALLBACK
#endif //OSGEARTH_ENGINE_OSGTERRAIN_FILE_LOCATION_CALLBACK_H
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