TileSource*
TileSourceFactory::create( const TileSourceOptions& options )
{
TileSource* result = 0L;
std::string driver = options.getDriver();
if ( driver.empty() )
{
OE_WARN << "ILLEGAL- no driver set for tile source" << std::endl;
return 0L;
}
osg::ref_ptr<osgDB::Options> rwopt = Registry::instance()->cloneOrCreateOptions();
rwopt->setPluginData( TILESOURCEOPTIONS_TAG, (void*)&options );
std::string driverExt = std::string( ".osgearth_" ) + driver;
result = dynamic_cast<TileSource*>( osgDB::readObjectFile( driverExt, rwopt.get() ) );
if ( !result )
{
OE_WARN << "WARNING: Failed to load TileSource driver for \"" << driver << "\"" << std::endl;
}
// apply an Override Profile if provided.
if ( result && options.profile().isSet() )
{
const Profile* profile = Profile::create(*options.profile());
if ( profile )
{
result->setProfile( profile );
}
}
return result;
}
TileSource::Status
CompositeTileSource::initialize(const osgDB::Options* dbOptions)
{
_dbOptions = Registry::instance()->cloneOrCreateOptions(dbOptions);
osg::ref_ptr<const Profile> profile = getProfile();
for(CompositeTileSourceOptions::ComponentVector::iterator i = _options._components.begin();
i != _options._components.end(); )
{
if ( i->_imageLayerOptions.isSet() )
{
if ( !i->_tileSourceInstance.valid() )
{
i->_tileSourceInstance = TileSourceFactory::create( i->_imageLayerOptions->driver().value() );
if ( !i->_tileSourceInstance.valid() )
{
OE_WARN << LC << "Could not find a TileSource for driver [" << i->_imageLayerOptions->driver()->getDriver() << "]" << std::endl;
}
}
}
if ( !i->_tileSourceInstance.valid() )
{
OE_WARN << LC << "A component has no valid TileSource ... removing." << std::endl;
i = _options._components.erase( i );
}
else
{
TileSource* source = i->_tileSourceInstance.get();
if ( source )
{
osg::ref_ptr<const Profile> localOverrideProfile = profile.get();
const TileSourceOptions& opt = source->getOptions();
if ( opt.profile().isSet() )
{
localOverrideProfile = Profile::create( opt.profile().value() );
source->setProfile( localOverrideProfile.get() );
}
// initialize the component tile source:
TileSource::Status compStatus = source->startup( _dbOptions.get() );
if ( compStatus == TileSource::STATUS_OK )
{
if ( !profile.valid() )
{
// assume the profile of the first source to be the overall profile.
profile = source->getProfile();
}
else if ( !profile->isEquivalentTo( source->getProfile() ) )
{
// if sub-sources have different profiles, print a warning because this is
// not supported!
OE_WARN << LC << "Components with differing profiles are not supported. "
<< "Visual anomalies may result." << std::endl;
}
_dynamic = _dynamic || source->isDynamic();
// gather extents
const DataExtentList& extents = source->getDataExtents();
for( DataExtentList::const_iterator j = extents.begin(); j != extents.end(); ++j )
{
getDataExtents().push_back( *j );
}
}
else
{
// if even one of the components fails to initialize, the entire
// composite tile source is invalid.
return Status::Error("At least one component is invalid");
}
}
}
++i;
}
// set the new profile that was derived from the components
setProfile( profile.get() );
_initialized = true;
return STATUS_OK;
}
