context_wgl.hpp

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#pragma once
#ifndef OGLPLUS_NATIVE_CONTEXT_1404232057_HPP
#define OGLPLUS_NATIVE_CONTEXT_1404232057_HPP
// NOTE: the include guard is intentionally without the _WGL suffix so that
// different native context implementation cannot be included simultaneously.

#include <oglplus/native/surface_wgl.hpp>

namespace oglplus {
namespace native {

class ContextWGL
{
private:
    ::HGLRC _context;

    friend ::HGLRC GetHGLRC(const ContextWGL&);

    struct Current_ { };

    ContextWGL(Current_)
     : _context(::wglGetCurrentContext())
    {
        if(!_context) HandleNoWGLRC();
    }
public:

    static ContextWGL Current(void)
    {
        return ContextWGL(Current_());
    }

    void MakeCurrent(const SurfaceWGL& surface)
    {
        ::wglMakeCurrent(surface._hdc, _context);
    }

    void Release(void)
    {
        ::wglMakeCurrent(::HDC(0), ::HGLRC(0));
    }
};

inline ::HGLRC GetHGLRC(const ContextWGL& cwgl)
{
    return cwgl._context;
}

typedef ContextWGL Context;

} // namespace native
} // namespace oglplus

#endif // include guard