/*

-----------------------------------------------------------------------------

This source file is part of OGRE

    (Object-oriented Graphics Rendering Engine)

For the latest info, see http://www.ogre3d.org/

Copyright (c) 2000-2014 Torus Knot Software Ltd

Permission is hereby granted, free of charge, to any person obtaining a copy

of this software and associated documentation files (the "Software"), to deal

in the Software without restriction, including without limitation the rights

to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

copies of the Software, and to permit persons to whom the Software is

furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in

all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

THE SOFTWARE.

-----------------------------------------------------------------------------

*/

#ifndef __MeshSerializer_H__

#define __MeshSerializer_H__

#include "OgrePrerequisites.h"

#include "OgreSerializer.h"

#include "OgreHeaderPrefix.h"

namespace Ogre {

    class MeshSerializerListener;

    class MeshVersionData;

    /// Mesh compatibility versions

    enum MeshVersion 

    {

        /// Latest version available

        MESH_VERSION_LATEST,

        /// OGRE version v1.10+

        MESH_VERSION_1_10,

        /// OGRE version v1.8+

        MESH_VERSION_1_8,

        /// OGRE version v1.7+

        MESH_VERSION_1_7,

        /// OGRE version v1.4+

        MESH_VERSION_1_4,

        /// OGRE version v1.0+

        MESH_VERSION_1_0,

        /// Legacy versions, DO NOT USE for writing

        MESH_VERSION_LEGACY

    };

    /** \addtogroup Core

    *  @{

    */

    /** \addtogroup Resources

    *  @{

    */

    /** Class for serialising mesh data to/from an OGRE .mesh file.

        This class allows exporters to write OGRE .mesh files easily, and allows the

        OGRE engine to import .mesh files into instantiated OGRE Meshes.

        Note that a .mesh file can include not only the Mesh, but also definitions of

        any Materials it uses (although this is optional, the .mesh can rely on the

        Material being loaded from another source, especially useful if you want to

        take advantage of OGRE's advanced Material properties which may not be available

        in your modeller).

    @par

        To export a Mesh:<OL>

        <LI>Use the MaterialManager methods to create any dependent Material objects, if you want

            to export them with the Mesh.</LI>

        <LI>Create a Mesh object and populate it using it's methods.</LI>

        <LI>Call the exportMesh method</LI>

        </OL>

    @par

        It's important to realise that this exporter uses OGRE terminology. In this context,

        'Mesh' means a top-level mesh structure which can actually contain many SubMeshes, each

        of which has only one Material. Modelling packages may refer to these differently, for

        example in Milkshape, it says 'Model' instead of 'Mesh' and 'Mesh' instead of 'SubMesh', 

        but the theory is the same.

    */

    class _OgreExport MeshSerializer : public Serializer

    {

    public:

        MeshSerializer();

        virtual ~MeshSerializer();

        /** Exports a mesh to the file specified, in a specific version format. 

         This method takes an externally created Mesh object, and exports it

         to a .mesh file in the specified format version. Note that picking a

         format version other that the latest will cause some information to be

         lost.

         @param pMesh Pointer to the Mesh to export

         @param filename The destination filename

         @param version Mesh version to write

         @param endianMode The endian mode of the written file

         */

        void exportMesh(const Mesh* pMesh, const String& filename, MeshVersion version,

                        Endian endianMode = ENDIAN_NATIVE);

        /// @overload

        void exportMesh(const Mesh* pMesh, const String& filename, Endian endianMode = ENDIAN_NATIVE)

        {

            exportMesh(pMesh, filename, MESH_VERSION_LATEST, endianMode);

        }

        /// @overload

        void exportMesh(const MeshPtr& pMesh, const String& filename, Endian endianMode = ENDIAN_NATIVE)

        {

            exportMesh(pMesh.get(), filename, MESH_VERSION_LATEST, endianMode);

        }

        /// @overload

        void exportMesh(const Mesh* pMesh, const DataStreamPtr& stream, Endian endianMode = ENDIAN_NATIVE)

        {

            exportMesh(pMesh, stream, MESH_VERSION_LATEST, endianMode);

        }

        /// @overload

        void exportMesh(const Mesh* pMesh, DataStreamPtr stream, MeshVersion version,

                        Endian endianMode = ENDIAN_NATIVE);

        /** Imports Mesh and (optionally) Material data from a .mesh file DataStream.

            This method imports data from a DataStream opened from a .mesh file and places it's

            contents into the Mesh object which is passed in. 

        @param stream The DataStream holding the .mesh data. Must be initialised (pos at the start of the buffer).

        @param pDest Pointer to the Mesh object which will receive the data. Should be blank already.

        */

        void importMesh(const DataStreamPtr& stream, Mesh* pDest);

        /// Sets the listener for this serializer

        void setListener(MeshSerializerListener *listener);

        /// Returns the current listener

        MeshSerializerListener *getListener();

    private:

        typedef std::vector<MeshVersionData*> MeshVersionDataList;

        MeshVersionDataList mVersionData;

        MeshSerializerListener *mListener;

    };

    /** 

        This class allows users to hook into the mesh loading process and

        modify references within the mesh as they are loading. Material and

        skeletal references can be processed using this interface which allows

        finer control over resources.

    */

    class MeshSerializerListener

    {

    public:

        virtual ~MeshSerializerListener() {}

        /// Called to override the loading of the given named material

        virtual void processMaterialName(Mesh *mesh, String *name) = 0;

        /// Called to override the reference to a skeleton

        virtual void processSkeletonName(Mesh *mesh, String *name) = 0;

        /// Allows to do changes on mesh after it's completely loaded. For example you can generate LOD levels here.

        virtual void processMeshCompleted(Mesh *mesh) = 0;

    };

    /** @} */

    /** @} */

}

#include "OgreHeaderSuffix.h"

#endif