opengl.h

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/*
**  ClanLib SDK
**  Copyright (c) 1997-2009 The ClanLib Team
**
**  This software is provided 'as-is', without any express or implied
**  warranty.  In no event will the authors be held liable for any damages
**  arising from the use of this software.
**
**  Permission is granted to anyone to use this software for any purpose,
**  including commercial applications, and to alter it and redistribute it
**  freely, subject to the following restrictions:
**
**  1. The origin of this software must not be misrepresented; you must not
**     claim that you wrote the original software. If you use this software
**     in a product, an acknowledgment in the product documentation would be
**     appreciated but is not required.
**  2. Altered source versions must be plainly marked as such, and must not be
**     misrepresented as being the original software.
**  3. This notice may not be removed or altered from any source distribution.
**
**  Note: Some of the libraries ClanLib may link to may have additional
**  requirements or restrictions.
**
**  File Author(s):
**
**    Magnus Norddahl
*/


#pragma once

#include "api_gl.h"
#include "opengl_defines.h"
#include <utility>
#include "../Core/Text/string_types.h"
#include "../Display/Image/pixel_format.h"
#include "../Display/Render/texture.h"

class CL_GLFunctions;
class CL_GraphicContext;
class CL_OpenGLGraphicContextProvider;

enum CL_TextureFormat;

typedef void (CL_ProcAddress)();

class CL_API_GL CL_OpenGL
{

public:
        static CL_ProcAddress *get_proc_address(const CL_String8 &function_name);

        static CL_GLFunctions *functions;


        static bool from_opengl_pixelformat(CLenum format, CLenum type, CL_PixelFormat &pf);


        static bool to_opengl_pixelformat(const CL_PixelFormat &pf, CLenum &format, CLenum &type);

        static void to_opengl_textureformat(CL_TextureFormat format, CLint &gl_internal_format, CLenum &gl_pixel_format);

        static void set_active(CL_GraphicContext &gc);

        static void set_active(const CL_OpenGLGraphicContextProvider * const gc_provider);

        static bool set_active();

};

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