4914d3974a
To set up extension aliases using a config file, an app calls: osgDB::Registry::instance()->readPluginAliasConfigurationFile(), passing in the file name as the parameter. (Of course this should be done before loading any files whose names depend on the mapping.) osgDB will search for the file using OSG_FILE_PATH. The file should contain a line for each mapping, with the "map" extension first, followed by a space or tab, then the plugin identifier. For example, a file containing this line: flt OpenFlight would map the ".flt" extension to the OpenFlight plugin."
567 lines
24 KiB
C++
567 lines
24 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
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*
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* This library is open source and may be redistributed and/or modified under
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* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
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* (at your option) any later version. The full license is in LICENSE file
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* included with this distribution, and on the openscenegraph.org website.
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*
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* This library 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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* OpenSceneGraph Public License for more details.
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*/
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#ifndef OSGDB_REGISTRY
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#define OSGDB_REGISTRY 1
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#include <osg/ref_ptr>
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#include <osg/ArgumentParser>
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#include <osgDB/DynamicLibrary>
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#include <osgDB/ReaderWriter>
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#include <osgDB/DotOsgWrapper>
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#include <osgDB/DatabasePager>
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#include <vector>
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#include <map>
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#include <string>
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namespace osgDB {
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/** basic structure for custom runtime inheritance checking */
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struct basic_type_wrapper {
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virtual ~basic_type_wrapper() {}
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virtual bool matches(const osg::Object *proto) const = 0;
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};
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/** a class template that checks inheritance between a given
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Object's class and a class defined at compile time through
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the template parameter T.
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This is used in conjunction with readObjectOfType() to
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specify an abstract class as reference type.
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**/
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template<class T>
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struct type_wrapper: basic_type_wrapper {
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bool matches(const osg::Object *proto) const
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{
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return dynamic_cast<const T*>(proto) != 0;
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}
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};
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/**
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Registry is a singleton factory which stores
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the reader/writers which are linked in
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at runtime for reading non-native file formats.
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The RegisterDotOsgWrapperProxy can be used to automatically register
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DotOsgWrappers, at runtime with the Registry. A DotOsgWrapper encapsulates
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the functions that can read and write to the .osg for each osg::Object.
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The RegisterReaderWriterProxy can be used to automatically
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register at runtime a reader/writer with the Registry.
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*/
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class OSGDB_EXPORT Registry : public osg::Referenced
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{
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public:
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static Registry* instance(bool erase = false);
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/** read the command line arguments.*/
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void readCommandLine(osg::ArgumentParser& commandLine);
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/** register an .fileextension alias to mapExt toExt, the later
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* should the the extension name of the readerwriter plugin library.
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* For example to map .tif files to the tiff loader, use
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* addExtAlias("tif","tiff") which will enable .tif to be read
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* by the libdb_tiff readerwriter plugin.*/
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void addFileExtensionAlias(const std::string mapExt, const std::string toExt);
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/** Reads a file that configures extension mappings. File is ASCII text
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* and each line contains the parameyters to the addFileExtensionAlias
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* method. Lines can be commented out with an initial '#' character.*/
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bool readPluginAliasConfigurationFile( const std::string& file );
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void addDotOsgWrapper(DotOsgWrapper* wrapper);
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void removeDotOsgWrapper(DotOsgWrapper* wrapper);
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void addReaderWriter(ReaderWriter* rw);
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void removeReaderWriter(ReaderWriter* rw);
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/** create the platform specific library name associated with file.*/
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std::string createLibraryNameForFile(const std::string& fileName);
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/** create the platform specific library name associated with file extension.*/
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std::string createLibraryNameForExtension(const std::string& ext);
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/** create the platform specific library name associated with nodekit library name.*/
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std::string createLibraryNameForNodeKit(const std::string& name);
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/** find the library in the OSG_LIBRARY_PATH and load it.*/
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bool loadLibrary(const std::string& fileName);
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/** close the attached library with specified name.*/
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bool closeLibrary(const std::string& fileName);
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/** close all libraries.*/
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void closeAllLibraries();
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/** get a reader writer which handles specified extension.*/
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ReaderWriter* getReaderWriterForExtension(const std::string& ext);
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osg::Object* readObjectOfType(const osg::Object& compObj,Input& fr);
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osg::Object* readObjectOfType(const basic_type_wrapper &btw, Input& fr);
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osg::Object* readObject(Input& fr);
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osg::Image* readImage(Input& fr);
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osg::Drawable* readDrawable(Input& fr);
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osg::Uniform* readUniform(Input& fr);
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osg::StateAttribute* readStateAttribute(Input& fr);
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osg::Node* readNode(Input& fr);
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bool writeObject(const osg::Object& obj,Output& fw);
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class ReadFileCallback : public osg::Referenced
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{
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public:
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virtual ReaderWriter::ReadResult openArchive(const std::string& filename,ReaderWriter::ArchiveStatus status, unsigned int indexBlockSizeHint, const ReaderWriter::Options* useObjectCache)
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{
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return osgDB::Registry::instance()->openArchiveImplementation(filename, status, indexBlockSizeHint, useObjectCache);
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}
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virtual ReaderWriter::ReadResult readObject(const std::string& filename, const ReaderWriter::Options* options)
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{
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return osgDB::Registry::instance()->readObjectImplementation(filename,options);
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}
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virtual ReaderWriter::ReadResult readImage(const std::string& filename, const ReaderWriter::Options* options)
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{
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return osgDB::Registry::instance()->readImageImplementation(filename,options);
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}
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virtual ReaderWriter::ReadResult readHeightField(const std::string& filename, const ReaderWriter::Options* options)
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{
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return osgDB::Registry::instance()->readHeightFieldImplementation(filename,options);
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}
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virtual ReaderWriter::ReadResult readNode(const std::string& filename, const ReaderWriter::Options* options)
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{
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return osgDB::Registry::instance()->readNodeImplementation(filename,options);
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}
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protected:
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virtual ~ReadFileCallback() {}
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};
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/** Set the Registry callback to use in place of the default readFile calls.*/
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void setReadFileCallback( ReadFileCallback* cb) { _readFileCallback = cb; }
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/** Get the readFile callback.*/
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ReadFileCallback* getReadFileCallback() { return _readFileCallback.get(); }
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/** Get the const readFile callback.*/
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const ReadFileCallback* getReadFileCallback() const { return _readFileCallback.get(); }
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ReaderWriter::ReadResult openArchive(const std::string& fileName,ReaderWriter::ArchiveStatus status, unsigned int indexBlockSizeHint, const ReaderWriter::Options* options)
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{
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if (_readFileCallback.valid()) return _readFileCallback->openArchive(fileName, status, indexBlockSizeHint, options);
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else return openArchiveImplementation(fileName, status, indexBlockSizeHint, options);
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}
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ReaderWriter::ReadResult openArchiveImplementation(const std::string& fileName, ReaderWriter::ArchiveStatus status, unsigned int indexBlockSizeHint, const ReaderWriter::Options* options);
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ReaderWriter::ReadResult readObject(const std::string& fileName,const ReaderWriter::Options* options)
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{
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if (_readFileCallback.valid()) return _readFileCallback->readObject(fileName,options);
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else return readObjectImplementation(fileName,options);
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}
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ReaderWriter::ReadResult readObjectImplementation(const std::string& fileName,const ReaderWriter::Options* options);
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ReaderWriter::ReadResult readImage(const std::string& fileName,const ReaderWriter::Options* options)
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{
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if (_readFileCallback.valid()) return _readFileCallback->readImage(fileName,options);
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else return readImageImplementation(fileName,options);
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}
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ReaderWriter::ReadResult readImageImplementation(const std::string& fileName,const ReaderWriter::Options* options);
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ReaderWriter::ReadResult readHeightField(const std::string& fileName,const ReaderWriter::Options* options)
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{
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if (_readFileCallback.valid()) return _readFileCallback->readHeightField(fileName,options);
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else return readHeightFieldImplementation(fileName,options);
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}
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ReaderWriter::ReadResult readHeightFieldImplementation(const std::string& fileName,const ReaderWriter::Options* options);
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ReaderWriter::ReadResult readNode(const std::string& fileName,const ReaderWriter::Options* options)
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{
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if (_readFileCallback.valid()) return _readFileCallback->readNode(fileName,options);
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else return readNodeImplementation(fileName,options);
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}
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ReaderWriter::ReadResult readNodeImplementation(const std::string& fileName,const ReaderWriter::Options* options);
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class WriteFileCallback : public osg::Referenced
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{
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public:
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virtual ReaderWriter::WriteResult writeObject(const osg::Object& obj, const std::string& fileName)
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{
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return osgDB::Registry::instance()->writeObjectImplementation(obj,fileName);
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}
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virtual ReaderWriter::WriteResult writeImage(const osg::Image& obj, const std::string& fileName)
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{
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return osgDB::Registry::instance()->writeImageImplementation(obj,fileName);
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}
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virtual ReaderWriter::WriteResult writeHeightField(const osg::HeightField& obj, const std::string& fileName)
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{
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return osgDB::Registry::instance()->writeHeightFieldImplementation(obj,fileName);
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}
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virtual ReaderWriter::WriteResult writeNode(const osg::Node& obj, const std::string& fileName)
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{
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return osgDB::Registry::instance()->writeNodeImplementation(obj,fileName);
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}
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protected:
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virtual ~WriteFileCallback() {}
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};
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/** Set the Registry callback to use in place of the default writeFile calls.*/
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void setWriteFileCallback( WriteFileCallback* cb) { _writeFileCallback = cb; }
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/** Get the writeFile callback.*/
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WriteFileCallback* getWriteFileCallback() { return _writeFileCallback.get(); }
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/** Get the const writeFile callback.*/
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const WriteFileCallback* getWriteFileCallback() const { return _writeFileCallback.get(); }
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ReaderWriter::WriteResult writeObject(const osg::Object& obj, const std::string& fileName)
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{
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if (_writeFileCallback.valid()) return _writeFileCallback->writeObject(obj,fileName);
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else return writeObjectImplementation(obj,fileName);
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}
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ReaderWriter::WriteResult writeObjectImplementation(const osg::Object& obj, const std::string& fileName);
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ReaderWriter::WriteResult writeImage(const osg::Image& obj, const std::string& fileName)
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{
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if (_writeFileCallback.valid()) return _writeFileCallback->writeImage(obj,fileName);
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else return writeImageImplementation(obj,fileName);
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}
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ReaderWriter::WriteResult writeImageImplementation(const osg::Image& obj, const std::string& fileName);
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ReaderWriter::WriteResult writeHeightField(const osg::HeightField& obj, const std::string& fileName)
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{
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if (_writeFileCallback.valid()) return _writeFileCallback->writeHeightField(obj,fileName);
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else return writeHeightFieldImplementation(obj,fileName);
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}
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ReaderWriter::WriteResult writeHeightFieldImplementation(const osg::HeightField& obj, const std::string& fileName);
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ReaderWriter::WriteResult writeNode(const osg::Node& node, const std::string& fileName)
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{
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if (_writeFileCallback.valid()) return _writeFileCallback->writeNode(node,fileName);
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else return writeNodeImplementation(node,fileName);
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}
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ReaderWriter::WriteResult writeNodeImplementation(const osg::Node& node, const std::string& fileName);
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void setCreateNodeFromImage(bool flag) { _createNodeFromImage = flag; }
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bool getCreateNodeFromImage() const { return _createNodeFromImage; }
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void setOptions(ReaderWriter::Options* opt) { _options = opt; }
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ReaderWriter::Options* getOptions() { return _options.get(); }
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const ReaderWriter::Options* getOptions() const { return _options.get(); }
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/** initilize both the Data and Library FilePaths, by default called by the
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* constructor, so it should only be required if you want to force
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* the re-reading of environmental variables.*/
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void initFilePathLists() { initDataFilePathList(); initLibraryFilePathList(); }
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/** initilize the Data FilePath by reading the OSG_FILE_PATH environmental variable.*/
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void initDataFilePathList();
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/** Set the data file path using a list of paths stored in a FilePath, which is used when search for data files.*/
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void setDataFilePathList(const FilePathList& filepath) { _dataFilePath = filepath; }
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/** Set the data file path using a single string deliminated either with ';' (Windows) or ':' (All other platforms), which is used when search for data files.*/
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void setDataFilePathList(const std::string& paths);
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/** get the data file path which is used when search for data files.*/
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FilePathList& getDataFilePathList() { return _dataFilePath; }
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/** get the const data file path which is used when search for data files.*/
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const FilePathList& getDataFilePathList() const { return _dataFilePath; }
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/** initilize the Library FilePath by reading the OSG_LIBRARY_PATH
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* and the appropriate system environmental variables*/
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void initLibraryFilePathList();
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/** Set the library file path using a list of paths stored in a FilePath, which is used when search for data files.*/
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void setLibraryFilePathList(const FilePathList& filepath) { _libraryFilePath = filepath; }
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/** Set the library file path using a single string deliminated either with ';' (Windows) or ':' (All other platforms), which is used when search for data files.*/
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void setLibraryFilePathList(const std::string& paths);
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/** get the library file path which is used when search for library (dso/dll's) files.*/
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FilePathList& getLibraryFilePathList() { return _libraryFilePath; }
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/** get the const library file path which is used when search for library (dso/dll's) files.*/
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const FilePathList& getLibraryFilePathList() const { return _libraryFilePath; }
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/** For each object in the cache which has an reference count greater than 1
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* (and therefore referenced by elsewhere in the application) set the time stamp
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* for that object in the cache to specified time.
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* This would typically be called once per frame by applications which are doing database paging,
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* and need to prune objects that are no longer required.
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* Time value is time in sceonds.*/
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void updateTimeStampOfObjectsInCacheWithExtenalReferences(double currentTime);
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/** Removed object in the cache which have a time stamp at or before the specified expiry time.
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* This would typically be called once per frame by applications which are doing database paging,
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* and need to prune objects that are no longer required, and called after the a called
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* after the call to updateTimeStampOfObjectsInCacheWithExtenalReferences(currentTime).
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* Note, the currentTime is not the expiryTime, one would typically set the expiry time
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* to a fixed amount of time before currentTime, such as expiryTime = currentTime-10.0.
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* Time value is time in sceonds.*/
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void removeExpiredObjectsInCache(double expiryTime);
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/** Remove all objects in the cache regardless of having external references or expiry times.*/
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void clearObjectCache();
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/** Add a filename,object,timestamp tripple to the Registry::ObjectCache.*/
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void addEntryToObjectCache(const std::string& filename, osg::Object* object, double timestamp = 0.0);
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/** Get an object from the object cache*/
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osg::Object* getFromObjectCache(const std::string& fileName);
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/** Add archive to archive cache so that future calls reference this archive.*/
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void addToArchiveCache(const std::string& fileName, osgDB::Archive* archive);
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/** Remove archive from cache.*/
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void removeFromArchiveCache(const std::string& fileName);
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/** Get an archive from the archive cache*/
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osgDB::Archive* getFromArchiveCache(const std::string& fileName);
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/** Remove all archives from the archive cache.*/
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void clearArchiveCache();
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/** If State is non-zero, this function releases OpenGL objects for
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* the specified graphics context. Otherwise, releases OpenGL objexts
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* for all graphics contexts. */
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void releaseGLObjects(osg::State* state=0);
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/** get the attached library with specified name.*/
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DynamicLibrary* getLibrary(const std::string& fileName);
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/** Set the DatabasePager.*/
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void setDatabasePager(DatabasePager* databasePager) { _databasePager = databasePager; }
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/** Get the DatabasePager, creating one if one is not already created.*/
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DatabasePager* getOrCreateDatabasePager();
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/** Get the DatabasePager. Return 0 if no DatabasePager has been assigned.*/
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DatabasePager* getDatabasePager() { return _databasePager.get(); }
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/** Set the SharedStateManager.*/
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void setSharedStateManager(SharedStateManager* SharedStateManager) { _sharedStateManager = SharedStateManager; }
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/** Get the SharedStateManager, creating one if one is not already created.*/
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SharedStateManager* getOrCreateSharedStateManager();
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/** Get the SharedStateManager. Return 0 if no SharedStateManager has been assigned.*/
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SharedStateManager* getSharedStateManager() { return _sharedStateManager.get(); }
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protected:
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virtual ~Registry();
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typedef std::vector< osg::ref_ptr<ReaderWriter> > ReaderWriterList;
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typedef std::map< std::string, osg::ref_ptr<DotOsgWrapper> > DotOsgWrapperMap;
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typedef std::vector< osg::ref_ptr<DynamicLibrary> > DynamicLibraryList;
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typedef std::map< std::string, std::string> ExtensionAliasMap;
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typedef std::pair<osg::ref_ptr<osg::Object>, double > ObjectTimeStampPair;
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typedef std::map<std::string, ObjectTimeStampPair > ObjectCache;
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typedef std::map<std::string, osg::ref_ptr<osgDB::Archive> > ArchiveCache;
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/** constructor is private, as its a singleton, preventing
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construction other than via the instance() method and
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therefore ensuring only one copy is ever constructed*/
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Registry();
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/** get the attached library with specified name.*/
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DynamicLibraryList::iterator getLibraryItr(const std::string& fileName);
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bool _createNodeFromImage;
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osg::Object* readObject(DotOsgWrapperMap& dowMap,Input& fr);
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void eraseWrapper(DotOsgWrapperMap& wrappermap,DotOsgWrapper* wrapper);
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public:
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/** Functor used in internal implementations.*/
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struct ReadFunctor
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{
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ReadFunctor(const std::string& filename, const ReaderWriter::Options* options):
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_filename(filename),
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_options(options) {}
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virtual ~ReadFunctor() {}
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virtual ReaderWriter::ReadResult doRead(ReaderWriter& rw) const = 0;
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virtual bool isValid(ReaderWriter::ReadResult& readResult) const = 0;
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virtual bool isValid(osg::Object* object) const = 0;
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std::string _filename;
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const ReaderWriter::Options* _options;
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};
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protected:
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// forward declare helper classes
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struct ReadObjectFunctor;
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struct ReadImageFunctor;
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struct ReadHeightFieldFunctor;
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struct ReadNodeFunctor;
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struct ReadArchiveFunctor;
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// make helper classes friends to get round VS6.0 "issues"
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friend struct ReadFunctor;
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friend struct ReadObjectFunctor;
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friend struct ReadImageFunctor;
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friend struct ReadHeightFieldFunctor;
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friend struct ReadNodeFunctor;
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friend struct ReadArchiveFunctor;
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ReaderWriter::ReadResult read(const ReadFunctor& readFunctor);
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ReaderWriter::ReadResult readImplementation(const ReadFunctor& readFunctor,bool useObjectCache);
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// forward declar helper class
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class AvailableReaderWriterIterator;
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friend class AvailableReaderWriterIterator;
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osg::ref_ptr<ReadFileCallback> _readFileCallback;
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osg::ref_ptr<WriteFileCallback> _writeFileCallback;
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DotOsgWrapperMap _objectWrapperMap;
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DotOsgWrapperMap _imageWrapperMap;
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DotOsgWrapperMap _drawableWrapperMap;
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DotOsgWrapperMap _stateAttrWrapperMap;
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DotOsgWrapperMap _uniformWrapperMap;
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DotOsgWrapperMap _nodeWrapperMap;
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DotOsgWrapperMap _classNameWrapperMap;
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ReaderWriterList _rwList;
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DynamicLibraryList _dlList;
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bool _openingLibrary;
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|
|
|
// map to alias to extensions to plugins.
|
|
ExtensionAliasMap _extAliasMap;
|
|
|
|
// Utility: Removes whitespace from both ends of a string.
|
|
static std::string trim( const std::string& str );
|
|
|
|
// options to pass to reader writers.
|
|
osg::ref_ptr<ReaderWriter::Options> _options;
|
|
|
|
FilePathList _dataFilePath;
|
|
FilePathList _libraryFilePath;
|
|
|
|
ObjectCache _objectCache;
|
|
OpenThreads::Mutex _objectCacheMutex;
|
|
|
|
ArchiveCache _archiveCache;
|
|
OpenThreads::Mutex _archiveCacheMutex;
|
|
|
|
|
|
osg::ref_ptr<DatabasePager> _databasePager;
|
|
osg::ref_ptr<SharedStateManager> _sharedStateManager;
|
|
|
|
};
|
|
|
|
/** read the command line arguments.*/
|
|
inline void readCommandLine(osg::ArgumentParser& parser)
|
|
{
|
|
Registry::instance()->readCommandLine(parser);
|
|
}
|
|
|
|
/** Proxy class for automatic registration of DotOsgWrappers with the Registry.*/
|
|
class RegisterDotOsgWrapperProxy
|
|
{
|
|
public:
|
|
|
|
RegisterDotOsgWrapperProxy(osg::Object* proto,
|
|
const std::string& name,
|
|
const std::string& associates,
|
|
DotOsgWrapper::ReadFunc readFunc,
|
|
DotOsgWrapper::WriteFunc writeFunc,
|
|
DotOsgWrapper::ReadWriteMode readWriteMode=DotOsgWrapper::READ_AND_WRITE)
|
|
{
|
|
if (Registry::instance())
|
|
{
|
|
_wrapper = new DotOsgWrapper(proto,name,associates,readFunc,writeFunc,readWriteMode);
|
|
Registry::instance()->addDotOsgWrapper(_wrapper.get());
|
|
}
|
|
}
|
|
|
|
~RegisterDotOsgWrapperProxy()
|
|
{
|
|
if (Registry::instance())
|
|
{
|
|
Registry::instance()->removeDotOsgWrapper(_wrapper.get());
|
|
}
|
|
}
|
|
|
|
protected:
|
|
osg::ref_ptr<DotOsgWrapper> _wrapper;
|
|
};
|
|
|
|
/** Proxy class for automatic registration of reader/writers with the Registry.*/
|
|
template<class T>
|
|
class RegisterReaderWriterProxy
|
|
{
|
|
public:
|
|
RegisterReaderWriterProxy()
|
|
{
|
|
if (Registry::instance())
|
|
{
|
|
_rw = new T;
|
|
Registry::instance()->addReaderWriter(_rw.get());
|
|
}
|
|
}
|
|
|
|
~RegisterReaderWriterProxy()
|
|
{
|
|
if (Registry::instance())
|
|
{
|
|
Registry::instance()->removeReaderWriter(_rw.get());
|
|
}
|
|
}
|
|
|
|
T* get() { return _rw.get(); }
|
|
|
|
protected:
|
|
osg::ref_ptr<T> _rw;
|
|
};
|
|
|
|
}
|
|
|
|
#endif
|