osgEarth::Cache*
Registry::getDefaultCache() const
{
if (!_defaultCache.valid())
{
std::string driverName = getDefaultCacheDriverName();
Threading::ScopedMutexLock lock(_regMutex);
if (!_defaultCache.valid())
{
const char* noCache = ::getenv(OSGEARTH_ENV_NO_CACHE);
if (noCache == 0L)
{
// see if there's a cache in the envvar; if so, create a cache.
// Note: the value of the OSGEARTH_CACHE_PATH is not used here; rather
// it's used in the driver(s) itself.
const char* cachePath = ::getenv(OSGEARTH_ENV_CACHE_PATH);
if (cachePath && !driverName.empty())
{
CacheOptions cacheOptions;
cacheOptions.setDriver(driverName);
_defaultCache = CacheFactory::create(cacheOptions);
}
}
}
}
return _defaultCache.get();
}
Registry::Registry() :
osg::Referenced ( true ),
_gdal_registered ( false ),
_numGdalMutexGets ( 0 ),
_uidGen ( 0 ),
_caps ( 0L ),
_defaultFont ( 0L ),
_terrainEngineDriver( "mp" ),
_cacheDriver ( "filesystem" )
{
// set up GDAL and OGR.
OGRRegisterAll();
GDALAllRegister();
// support Chinese character in the file name and attributes in ESRI's shapefile
CPLSetConfigOption("GDAL_FILENAME_IS_UTF8","NO");
CPLSetConfigOption("SHAPE_ENCODING","");
// global initialization for CURL (not thread safe)
HTTPClient::globalInit();
// generates the basic shader code for the terrain engine and model layers.
_shaderLib = new ShaderFactory();
// shader generator used internally by osgEarth. Can be replaced.
_shaderGen = new ShaderGenerator();
// thread pool for general use
_taskServiceManager = new TaskServiceManager();
// optimizes sharing of state attributes and state sets for
// performance boost
_stateSetCache = new StateSetCache();
// Default unref-after apply policy:
_unRefImageDataAfterApply = true;
// Default object index for tracking scene object by UID.
_objectIndex = new ObjectIndex();
// activate KMZ support
osgDB::Registry::instance()->addArchiveExtension ( "kmz" );
osgDB::Registry::instance()->addFileExtensionAlias( "kmz", "kml" );
osgDB::Registry::instance()->addMimeTypeExtensionMapping( "application/vnd.google-earth.kml+xml", "kml" );
osgDB::Registry::instance()->addMimeTypeExtensionMapping( "application/vnd.google-earth.kmz", "kmz" );
osgDB::Registry::instance()->addMimeTypeExtensionMapping( "text/plain", "osgb" );
osgDB::Registry::instance()->addMimeTypeExtensionMapping( "text/xml", "osgb" );
osgDB::Registry::instance()->addMimeTypeExtensionMapping( "application/json", "osgb" );
osgDB::Registry::instance()->addMimeTypeExtensionMapping( "text/json", "osgb" );
osgDB::Registry::instance()->addMimeTypeExtensionMapping( "text/x-json", "osgb" );
osgDB::Registry::instance()->addMimeTypeExtensionMapping( "image/jpg", "jpg" );
osgDB::Registry::instance()->addMimeTypeExtensionMapping( "image/dds", "dds" );
// pre-load OSG's ZIP plugin so that we can use it in URIs
std::string zipLib = osgDB::Registry::instance()->createLibraryNameForExtension( "zip" );
if ( !zipLib.empty() )
osgDB::Registry::instance()->loadLibrary( zipLib );
// set up our default r/w options to NOT cache archives!
_defaultOptions = new osgDB::Options();
_defaultOptions->setObjectCacheHint( osgDB::Options::CACHE_NONE );
// activate no-cache mode from the environment
if ( ::getenv(OSGEARTH_ENV_NO_CACHE) )
{
_overrideCachePolicy = CachePolicy::NO_CACHE;
OE_INFO << LC << "NO-CACHE MODE set from environment" << std::endl;
}
else
{
// activate cache-only mode from the environment
if ( ::getenv(OSGEARTH_ENV_CACHE_ONLY) )
{
_overrideCachePolicy->usage() = CachePolicy::USAGE_CACHE_ONLY;
OE_INFO << LC << "CACHE-ONLY MODE set from environment" << std::endl;
}
// see if the environment specifies a default caching driver.
const char* cacheDriver = ::getenv(OSGEARTH_ENV_CACHE_DRIVER);
if ( cacheDriver )
{
setDefaultCacheDriverName( cacheDriver );
OE_INFO << LC << "Cache driver set from environment: "
<< getDefaultCacheDriverName() << std::endl;
}
// cache max age?
const char* cacheMaxAge = ::getenv(OSGEARTH_ENV_CACHE_MAX_AGE);
if ( cacheMaxAge )
{
TimeSpan maxAge = osgEarth::as<long>( std::string(cacheMaxAge), INT_MAX );
_overrideCachePolicy->maxAge() = maxAge;
}
// see if there's a cache in the envvar; if so, create a cache.
// Note: the value of the OSGEARTH_CACHE_PATH is not used here; rather
// it's used in the driver(s) itself.
const char* cachePath = ::getenv(OSGEARTH_ENV_CACHE_PATH);
if ( cachePath )
{
CacheOptions options;
options.setDriver( getDefaultCacheDriverName() );
osg::ref_ptr<Cache> cache = CacheFactory::create(options);
if ( cache->isOK() )
{
setCache( cache.get() );
}
else
{
OE_WARN << LC << "FAILED to initialize cache from environment" << std::endl;
}
}
}
const char* teStr = ::getenv(OSGEARTH_ENV_TERRAIN_ENGINE_DRIVER);
if ( teStr )
{
_terrainEngineDriver = std::string(teStr);
}
// load a default font
const char* envFont = ::getenv("OSGEARTH_DEFAULT_FONT");
if ( envFont )
{
_defaultFont = osgText::readFontFile( std::string(envFont) );
}
if ( !_defaultFont.valid() )
{
#ifdef WIN32
_defaultFont = osgText::readFontFile("arial.ttf");
#endif
}
if ( _defaultFont.valid() )
{
// mitigates mipmapping issues that cause rendering artifacts
// for some fonts/placement
_defaultFont->setGlyphImageMargin( 2 );
}
// register the system stock Units.
Units::registerAll( this );
}
