/*
   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_ITEXTURES_H )
#define INCLUDED_ITEXTURES_H

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

struct qtexture_t;

class LoadImageCallback
{
typedef Image* ( *LoadFunc )( void* environment, const char* name );
public:
void* m_environment;
LoadFunc m_func;

LoadImageCallback( void* environment, LoadFunc func ) : m_environment( environment ), m_func( func ){
}
Image* loadImage( const char* name ) const {
	return m_func( m_environment, name );
}
};

inline bool operator==( const LoadImageCallback& self, const LoadImageCallback& other ){
	return self.m_environment == other.m_environment && self.m_func == other.m_func;
}
inline bool operator<( const LoadImageCallback& self, const LoadImageCallback& other ){
	return self.m_environment < other.m_environment ||
		   ( !( other.m_environment < self.m_environment ) && self.m_func < other.m_func );
}

class TexturesCacheObserver
{
public:
virtual void unrealise() = 0;
virtual void realise() = 0;
};

class TexturesCache
{
public:
virtual ~TexturesCache() = default;
INTEGER_CONSTANT( Version, 1 );
STRING_CONSTANT( Name, "textures" );
virtual LoadImageCallback defaultLoader() const = 0;
virtual Image* loadImage( const char* name ) = 0;
virtual qtexture_t* capture( const char* name ) = 0;
virtual qtexture_t* capture( const LoadImageCallback& load, const char* name ) = 0;
virtual void release( qtexture_t* texture ) = 0;
virtual void attach( TexturesCacheObserver& observer ) = 0;
virtual void detach( TexturesCacheObserver& observer ) = 0;
};

#include "modulesystem.h"

template<typename Type>
class GlobalModule;
typedef GlobalModule<TexturesCache> GlobalTexturesModule;

template<typename Type>
class GlobalModuleRef;
typedef GlobalModuleRef<TexturesCache> GlobalTexturesModuleRef;

inline TexturesCache& GlobalTexturesCache(){
	return GlobalTexturesModule::getTable();
}

#endif
