// Description:
//   Wrapper for a GL texture cube map in conjunction with SDL.
//
// Copyright (C) 2005 Frank Becker
//
// This program 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.
//
// This program 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
//
#ifndef _GLTextureCubeMap_hpp_
#define _GLTextureCubeMap_hpp_

#include <gl++.hpp>
#include <SDL_image.h>

#ifndef GL_ARB_texture_cube_map
#define GL_NORMAL_MAP_ARB                  0x8511
#define GL_REFLECTION_MAP_ARB              0x8512
#define GL_TEXTURE_CUBE_MAP_ARB            0x8513
#define GL_TEXTURE_BINDING_CUBE_MAP_ARB    0x8514
#define GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB 0x8515
#define GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB 0x8516
#define GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB 0x8517
#define GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB 0x8518
#define GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB 0x8519
#define GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB 0x851A
#define GL_PROXY_TEXTURE_CUBE_MAP_ARB      0x851B
#define GL_MAX_CUBE_MAP_TEXTURE_SIZE_ARB   0x851C
#endif


class GLTextureCubeMap : public GLTextureI
{
public:
    GLTextureCubeMap( SDL_Surface *image[6], bool mipmap = false);

    ~GLTextureCubeMap();

    void bind( void){ glBindTexture( GL_TEXTURE_CUBE_MAP_ARB, _textureID);}
    void unbind( void){ glBindTexture( GL_TEXTURE_CUBE_MAP_ARB, 0);}
    void reload( void);

    void enable( void);
    void disable( void);

private:
    GLuint _textureID;
    SDL_Surface *_image[6];
    bool _mipmap;

    void init( void);
    GLenum getGLTextureFormat( SDL_Surface *image);
};

#endif