/*
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/callbackfwd.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 Callback1<SkinRemap> SkinRemapCallback;
class ModuleObserver;

class ModelSkin
{
public:
  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:
  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