83bf813e58
instead of osgDB::Registry where it original lay. This has been done to allow fileName strings to be encode data rather than just file names, such as one requires when using PagedLOD along with plugins for doing dynamic tesselation.
162 lines
8.0 KiB
C++
162 lines
8.0 KiB
C++
/* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2003 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_READERWRITER
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#define OSGDB_READERWRITER 1
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#include <osg/Referenced>
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#include <osg/Image>
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#include <osg/Shape>
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#include <osg/Node>
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#include <osgDB/Export>
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#include <string>
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namespace osgDB {
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/** pure virtual base class for reading and writing of non native formats. */
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class OSGDB_EXPORT ReaderWriter : public osg::Referenced
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{
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public:
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virtual ~ReaderWriter() {}
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virtual const char* className() = 0;
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virtual bool acceptsExtension(const std::string& /*extension*/) { return false; }
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class Options : public osg::Referenced
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{
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public:
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Options() {}
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Options(const std::string& str):_str(str) {}
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void setOptionString(const std::string& str) { _str = str; }
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const std::string& getOptionString() const { return _str; }
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protected:
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virtual ~Options() {}
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std::string _str;
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};
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class ReadResult
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{
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public:
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enum ReadStatus
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{
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FILE_NOT_HANDLED,
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FILE_NOT_FOUND,
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FILE_LOADED,
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ERROR_IN_READING_FILE
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};
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ReadResult(ReadStatus status=FILE_NOT_HANDLED):_status(status) {}
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ReadResult(const std::string& m):_status(ERROR_IN_READING_FILE),_message(m) {}
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ReadResult(osg::Object* obj):_status(FILE_LOADED),_object(obj) {}
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ReadResult(const ReadResult& rr):_status(rr._status),_message(rr._message),_object(rr._object) {}
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ReadResult& operator = (const ReadResult& rr) { if (this==&rr) return *this; _status=rr._status; _message=rr._message;_object=rr._object; return *this; }
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osg::Object* getObject() { return _object.get(); }
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osg::Image* getImage() { return dynamic_cast<osg::Image*>(_object.get()); }
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osg::HeightField* getHeightField() { return dynamic_cast<osg::HeightField*>(_object.get()); }
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osg::Node* getNode() { return dynamic_cast<osg::Node*>(_object.get()); }
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bool validObject() { return _object.valid(); }
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bool validImage() { return getImage()!=0; }
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bool validHeightField() { return getHeightField()!=0; }
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bool validNode() { return getNode()!=0; }
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osg::Object* takeObject() { osg::Object* obj = _object.get(); if (obj) { obj->ref(); _object=NULL; obj->unref_nodelete(); } return obj; }
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osg::Image* takeImage() { osg::Image* image=dynamic_cast<osg::Image*>(_object.get()); if (image) { image->ref(); _object=NULL; image->unref_nodelete(); } return image; }
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osg::HeightField* takeHeightField() { osg::HeightField* hf=dynamic_cast<osg::HeightField*>(_object.get()); if (hf) { hf->ref(); _object=NULL; hf->unref_nodelete(); } return hf; }
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osg::Node* takeNode() { osg::Node* node=dynamic_cast<osg::Node*>(_object.get()); if (node) { node->ref(); _object=NULL; node->unref_nodelete(); } return node; }
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const std::string& message() const { return _message; }
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ReadStatus status() const { return _status; }
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bool success() const { return _status==FILE_LOADED; }
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bool error() const { return _status==ERROR_IN_READING_FILE; }
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bool notHandled() const { return _status==FILE_NOT_HANDLED; }
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bool notFound() const { return _status==FILE_NOT_FOUND; }
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protected:
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ReadStatus _status;
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std::string _message;
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osg::ref_ptr<osg::Object> _object;
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};
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class WriteResult
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{
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public:
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enum WriteStatus
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{
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FILE_NOT_HANDLED,
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FILE_SAVED,
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ERROR_IN_WRITING_FILE
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};
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WriteResult(WriteStatus status=FILE_NOT_HANDLED):_status(status) {}
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WriteResult(const std::string& m):_status(ERROR_IN_WRITING_FILE),_message(m) {}
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WriteResult(const WriteResult& rr):_status(rr._status),_message(rr._message) {}
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WriteResult& operator = (const WriteResult& rr) { if (this==&rr) return *this; _status=rr._status; _message=rr._message; return *this; }
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const std::string& message() const { return _message; }
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WriteStatus status() const { return _status; }
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bool success() const { return _status==FILE_SAVED; }
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bool error() const { return _status==ERROR_IN_WRITING_FILE; }
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bool notHandled() const { return _status==FILE_NOT_HANDLED; }
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protected:
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WriteStatus _status;
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std::string _message;
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};
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virtual ReadResult readObject(const std::string& /*fileName*/,const Options* =NULL) { return ReadResult(ReadResult::FILE_NOT_HANDLED); }
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virtual ReadResult readImage(const std::string& /*fileName*/,const Options* =NULL) { return ReadResult(ReadResult::FILE_NOT_HANDLED); }
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virtual ReadResult readHeightField(const std::string& /*fileName*/,const Options* =NULL) { return ReadResult(ReadResult::FILE_NOT_HANDLED); }
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virtual ReadResult readNode(const std::string& /*fileName*/,const Options* =NULL) { return ReadResult(ReadResult::FILE_NOT_HANDLED); }
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virtual WriteResult writeObject(const osg::Object& /*obj*/,const std::string& /*fileName*/,const Options* =NULL) {return WriteResult(WriteResult::FILE_NOT_HANDLED); }
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virtual WriteResult writeImage(const osg::Image& /*image*/,const std::string& /*fileName*/,const Options* =NULL) {return WriteResult(WriteResult::FILE_NOT_HANDLED); }
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virtual WriteResult writeHeightField(const osg::HeightField& /*heightField*/,const std::string& /*fileName*/,const Options* =NULL) {return WriteResult(WriteResult::FILE_NOT_HANDLED); }
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virtual WriteResult writeNode(const osg::Node& /*node*/,const std::string& /*fileName*/,const Options* =NULL) { return WriteResult(WriteResult::FILE_NOT_HANDLED); }
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virtual ReadResult readObject(std::istream& /*fin*/,const Options* =NULL) { return ReadResult(ReadResult::FILE_NOT_HANDLED); }
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virtual ReadResult readImage(std::istream& /*fin*/,const Options* =NULL) { return ReadResult(ReadResult::FILE_NOT_HANDLED); }
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virtual ReadResult readHeightField(std::istream& /*fin*/,const Options* =NULL) { return ReadResult(ReadResult::FILE_NOT_HANDLED); }
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virtual ReadResult readNode(std::istream& /*fin*/,const Options* =NULL) { return ReadResult(ReadResult::FILE_NOT_HANDLED); }
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virtual WriteResult writeObject(const osg::Object& /*obj*/,std::ostream& /*fout*/,const Options* =NULL) {return WriteResult(WriteResult::FILE_NOT_HANDLED); }
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virtual WriteResult writeImage(const osg::Image& /*image*/,std::ostream& /*fout*/,const Options* =NULL) {return WriteResult(WriteResult::FILE_NOT_HANDLED); }
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virtual WriteResult writeHeightField(const osg::HeightField& /*heightField*/,std::ostream& /*fout*/,const Options* =NULL) {return WriteResult(WriteResult::FILE_NOT_HANDLED); }
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virtual WriteResult writeNode(const osg::Node& /*node*/,std::ostream& /*fout*/,const Options* =NULL) { return WriteResult(WriteResult::FILE_NOT_HANDLED); }
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};
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}
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#endif // OSG_READERWRITER
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