97f515985d
git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@2 fdac6126-5c0c-442c-9429-916003d36597
225 lines
7.2 KiB
C++
225 lines
7.2 KiB
C++
/*===========================================================================*\
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* *
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* OpenMesh *
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* Copyright (C) 2003 by Computer Graphics Group, RWTH Aachen *
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* www.openmesh.org *
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* *
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*---------------------------------------------------------------------------*
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* *
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* License *
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* *
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* This library is free software; you can redistribute it and/or modify it *
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* under the terms of the GNU Lesser General Public License as published *
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* by the Free Software Foundation, version 2.1. *
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* *
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* This library is distributed in the hope that it will be useful, but *
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* WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
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* 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 *
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* License along with this library; if not, write to the Free Software *
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
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* *
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\*===========================================================================*/
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// $Id: IOManager.hh,v 1.2 2007-05-18 15:17:34 habbecke Exp $
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//=============================================================================
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//
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// Implements the OpenMesh IOManager singleton
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//
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//=============================================================================
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#ifndef __IOMANAGER_HH__
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#define __IOMANAGER_HH__
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//=== INCLUDES ================================================================
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// STL
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#include <iostream>
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#include <sstream>
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#include <string>
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#include <set>
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// OpenMesh
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#include <OpenMesh/Core/System/config.h>
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#include <OpenMesh/Core/IO/Options.hh>
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#include <OpenMesh/Core/IO/reader/BaseReader.hh>
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#include <OpenMesh/Core/IO/writer/BaseWriter.hh>
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#include <OpenMesh/Core/IO/importer/BaseImporter.hh>
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#include <OpenMesh/Core/IO/exporter/BaseExporter.hh>
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#include <OpenMesh/Core/Utils/SingletonT.hh>
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//== NAMESPACES ===============================================================
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namespace OpenMesh {
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namespace IO {
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//=== IMPLEMENTATION ==========================================================
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/** This is the real IOManager class that is later encapsulated by
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SingletonT to enforce its uniqueness. _IOManager_ is not meant to be used
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directly by the programmer - the IOManager alias exists for this task.
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All reader/writer modules register themselves at this class. For
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reading or writing data all modules are asked to do the job. If no
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suitable module is found, an error is returned.
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For the sake of reading, the target data structure is hidden
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behind the BaseImporter interface that takes care of adding
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vertices or faces.
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Writing from a source structure is encapsulate similarly behind a
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BaseExporter interface, providing iterators over vertices/faces to
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the writer modules.
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\see \ref mesh_io
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*/
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class _IOManager_
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{
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private:
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_IOManager_() {}
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friend _IOManager_& IOManager();
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public:
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/**
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Read a mesh from file _filename. The target data structure is specified
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by the given BaseImporter. The \c read method consecutively queries all
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of its reader modules. True is returned upon success, false if all
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reader modules failed to interprete _filename.
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*/
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bool read(const std::string& _filename,
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BaseImporter& _bi,
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Options& _opt);
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/** Write a mesh to file _filename. The source data structure is specified
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by the given BaseExporter. The \c save method consecutively queries all
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of its writer modules. True is returned upon success, false if all
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writer modules failed to write the requested format.
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Options is determined by _filename's extension.
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*/
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bool write(const std::string& _filename,
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BaseExporter& _be,
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Options _opt=Options::Default);
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/// Returns true if the format is supported by one of the reader modules.
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bool can_read( const std::string& _format ) const;
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/// Returns true if the format is supported by one of the writer modules.
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bool can_write( const std::string& _format ) const;
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size_t binary_size(const std::string& _format,
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BaseExporter& _be,
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Options _opt = Options::Default)
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{
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const BaseWriter *bw = find_writer(_format);
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return bw ? bw->binary_size(_be,_opt) : 0;
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}
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public: //-- QT convenience function ------------------------------------------
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/** Returns all readable file extension + descriptions in one string.
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File formats are separated by <c>;;</c>.
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Convenience function for Qt file dialogs.
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*/
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const std::string& qt_read_filters() const { return read_filters_; }
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/** Returns all writeable file extension + descriptions in one string.
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File formats are separated by <c>;;</c>.
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Convenience function for Qt file dialogs.
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*/
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const std::string& qt_write_filters() const { return write_filters_; }
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private:
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// collect all readable file extensions
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void update_read_filters();
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// collect all writeable file extensions
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void update_write_filters();
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public: //-- SYSTEM PART------------------------------------------------------
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/** Registers a new reader module. A call to this function should be
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implemented in the constructor of all classes derived from BaseReader.
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*/
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bool register_module(BaseReader* _bl)
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{
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reader_modules_.insert(_bl);
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update_read_filters();
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return true;
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}
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/** Registers a new writer module. A call to this function should be
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implemented in the constructor of all classed derived from BaseWriter.
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*/
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bool register_module(BaseWriter* _bw)
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{
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writer_modules_.insert(_bw);
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update_write_filters();
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return true;
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}
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private:
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const BaseWriter *find_writer(const std::string& _format);
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// stores registered reader modules
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std::set<BaseReader*> reader_modules_;
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// stores registered writer modules
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std::set<BaseWriter*> writer_modules_;
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// input filters (e.g. for Qt file dialog)
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std::string read_filters_;
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// output filters (e.g. for Qt file dialog)
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std::string write_filters_;
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};
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//=============================================================================
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extern _IOManager_* __IOManager_instance;
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_IOManager_& IOManager();
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//=============================================================================
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} // namespace IO
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} // namespace OpenMesh
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//=============================================================================
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#endif
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//=============================================================================
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