/*
   Copyright (C) 2001-2006, William Joseph.
   All Rights Reserved.

   This file is part of GtkRadiant.

   GtkRadiant is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.

   GtkRadiant is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with GtkRadiant; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */

#if !defined( INCLUDED_MODELSKIN_H )
#define INCLUDED_MODELSKIN_H

#include "generic/constant.h"
#include "generic/callback.h"

class SkinRemap
{
public:
const char* m_from;
const char* m_to;
SkinRemap( const char* from, const char* to ) : m_from( from ), m_to( to ){
}
};

typedef Callback<void(SkinRemap)> SkinRemapCallback;
class ModuleObserver;

class ModelSkin
{
public:
virtual ~ModelSkin() = default;
STRING_CONSTANT( Name, "ModelSkin" );
/// \brief Attach an \p observer whose realise() and unrealise() methods will be called when the skin is loaded or unloaded.
virtual void attach( ModuleObserver& observer ) = 0;
/// \brief Detach an \p observer previously-attached by calling \c attach.
virtual void detach( ModuleObserver& observer ) = 0;
/// \brief Returns true if this skin is currently loaded.
virtual bool realised() const = 0;
/// \brief Returns the shader identifier that \p name remaps to, or "" if not found or not realised.
virtual const char* getRemap( const char* name ) const = 0;
/// \brief Calls \p callback for each remap pair. Has no effect if not realised.
virtual void forEachRemap( const SkinRemapCallback& callback ) const = 0;
};

class SkinnedModel
{
public:
STRING_CONSTANT( Name, "SkinnedModel" );
/// \brief Instructs the skinned model to update its skin.
virtual void skinChanged() = 0;
};

class ModelSkinCache
{
public:
virtual ~ModelSkinCache() = default;
INTEGER_CONSTANT( Version, 1 );
STRING_CONSTANT( Name, "modelskin" );
/// \brief Increments the reference count of and returns a reference to the skin uniquely identified by 'name'.
virtual ModelSkin& capture( const char* name ) = 0;
/// \brief Decrements the reference-count of the skin uniquely identified by 'name'.
virtual void release( const char* name ) = 0;
};


#include "modulesystem.h"

template<typename Type>
class GlobalModule;
typedef GlobalModule<ModelSkinCache> GlobalModelSkinCacheModule;

template<typename Type>
class GlobalModuleRef;
typedef GlobalModuleRef<ModelSkinCache> GlobalModelSkinCacheModuleRef;

inline ModelSkinCache& GlobalModelSkinCache(){
	return GlobalModelSkinCacheModule::getTable();
}

#endif
