context_glx.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 _GLX suffix so that
// different native context implementation cannot be included simultaneously.

#include <oglplus/native/surface_glx.hpp>

namespace oglplus {
namespace native {

class ContextGLX
{
private:
    ::Display* _display;
    ::GLXContext _context;

    friend ::Display* GetGLXDisplay(const ContextGLX&);
    friend ::GLXContext GetGLXContext(const ContextGLX&);

    struct Current_ { };

    ContextGLX(Current_)
     : _display(::glXGetCurrentDisplay())
     , _context(::glXGetCurrentContext())
    {
        if(!_display) HandleNoGLXDisplay();
        if(!_context) HandleNoGLXContext();
    }
public:

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

    void MakeCurrent(const SurfaceGLX& surface)
    {
        ::glXMakeCurrent(
            _display,
            surface._drawable,
            _context
        );
    }

    void Release(void)
    {
        ::glXMakeCurrent(
            _display,
            ::GLXDrawable(0),
            ::GLXContext(0)
        );
    }
};

inline ::Display* GetGLXDisplay(const ContextGLX& cglx)
{
    return cglx._display;
}

inline ::GLXContext GetGLXContext(const ContextGLX& cglx)
{
    return cglx._context;
}

typedef ContextGLX Context;

} // namespace native
} // namespace oglplus

#endif // include guard