/****************************************************************************

    AstroMenace
    Hardcore 3D space scroll-shooter with spaceship upgrade possibilities.
    Copyright (c) 2006-2019 Mikhail Kurinnoi, Viewizard


    AstroMenace 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 3 of the License, or
    (at your option) any later version.

    AstroMenace 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 AstroMenace. If not, see <https://www.gnu.org/licenses/>.


    Website: https://viewizard.com/
    Project: https://github.com/viewizard/astromenace
    E-mail: viewizard@viewizard.com

*****************************************************************************/

// NOTE glu.h should be removed after OpenGL 3.1 core profile switch,
//      all glu functionality should be replaced:
//      gluLookAt(), gluBuild2DMipmaps() and gluPerspective()

#ifndef CORE_GRAPHICS_OPENGL_H
#define CORE_GRAPHICS_OPENGL_H

#if defined(__APPLE__) && defined(__MACH__)
    #define GL_GLEXT_LEGACY
    #define GL_SILENCE_DEPRECATION
    #include <OpenGL/gl.h>
    #include <OpenGL/glu.h>
#else
    #define GL_GLEXT_LEGACY
    #define __glext_h_
    #include <GL/gl.h>
    #include <GL/glu.h>
    #undef __glext_h_
#endif

// GL version can be defined by system gl.h header
// undef them, since we need function's typedefs
#undef GL_VERSION_1_3
#undef GL_VERSION_1_4
#undef GL_VERSION_1_5
#undef GL_VERSION_2_0
#undef GL_VERSION_2_1
#undef GL_VERSION_3_0
#undef GL_VERSION_3_1
#undef GL_VERSION_3_2
#undef GL_VERSION_3_3
#undef GL_VERSION_4_0
#undef GL_VERSION_4_1
#undef GL_VERSION_4_2
#undef GL_VERSION_4_3
#undef GL_VERSION_4_4
#undef GL_VERSION_4_5
#undef GL_VERSION_4_6

#include "glext.h" // provide glext.h version we need

namespace viewizard {

// alias for OpenGL variable types, in order to make code more clear
using GLtexture = GLuint;
using GLrenderbuffer = GLuint;
using GLframebuffer = GLuint;

} // viewizard namespace

#endif // CORE_GRAPHICS_OPENGL_H
