62 lines
2.0 KiB
Plaintext
62 lines
2.0 KiB
Plaintext
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/* -*-c++-*- */
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/* osgEarth - Geospatial SDK for OpenSceneGraph
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* Copyright 2020 Pelican Mapping
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* http://osgearth.org
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*
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* osgEarth is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*/
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#pragma once
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#include <osgEarth/Common>
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#include <osgEarth/Registry>
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#include <osgDB/Registry>
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#include <osgDB/FileNameUtils>
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namespace osgEarth { namespace Util
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{
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/**
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* Create one of these as a static global to register an OSG plugin at startup.
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*/
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template<class T>
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struct RegisterPluginLoader
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{
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RegisterPluginLoader(const std::string& name)
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{
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OE_HARD_ASSERT(osgDB::Registry::instance());
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osgDB::Registry::instance()->addReaderWriter(new T(name));
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}
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};
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/**
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* OSG plugin that will create an instance of a type with configuration options.
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*/
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template<typename T, typename U>
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class PluginLoader : public osgDB::ReaderWriter
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{
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public: // Plugin stuff
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PluginLoader(const std::string& name) {
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supportsExtension(name, name);
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}
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inline ReadResult readObject(const std::string& filename, const osgDB::Options* dbOptions) const override
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{
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if (!acceptsExtension(osgDB::getLowerCaseFileExtension(filename)))
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return ReadResult::FILE_NOT_HANDLED;
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return ReadResult(new T(U::getConfigOptions(dbOptions)));
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}
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};
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} } // namespace osgEarth
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