/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */

/* vim: set ts=8 sts=4 et sw=4 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef GLCONTEXTGLX_H_

#define GLCONTEXTGLX_H_

#include "GLContext.h"

#include "GLXLibrary.h"

#include "mozilla/X11Util.h"

class gfxXlibSurface;

namespace mozilla {

namespace gl {

class GLContextGLX : public GLContext

{

public:

    MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(GLContextGLX, override)

    static already_AddRefed<GLContextGLX>

    CreateGLContext(CreateContextFlags flags,

                    const SurfaceCaps& caps,

                    bool isOffscreen,

                    Display* display,

                    GLXDrawable drawable,

                    GLXFBConfig cfg,

                    bool deleteDrawable,

                    gfxXlibSurface* pixmap);

    static bool

    FindVisual(Display* display, int screen, bool useWebRender,

               bool useAlpha, int* const out_visualId);

    // Finds a GLXFBConfig compatible with the provided window.

    static bool

    FindFBConfigForWindow(Display* display, int screen, Window window,

                          ScopedXFree<GLXFBConfig>* const out_scopedConfigArr,

                          GLXFBConfig* const out_config, int* const out_visid,

                          bool aWebRender);

    ~GLContextGLX();

    virtual GLContextType GetContextType() const override { return GLContextType::GLX; }

    static GLContextGLX* Cast(GLContext* gl) {

        MOZ_ASSERT(gl->GetContextType() == GLContextType::GLX);

        return static_cast<GLContextGLX*>(gl);

    }

    bool Init() override;

    virtual bool MakeCurrentImpl() const override;

    virtual bool IsCurrentImpl() const override;

    virtual bool SetupLookupFunction() override;

    virtual bool IsDoubleBuffered() const override;

    virtual bool SwapBuffers() override;

    virtual void GetWSIInfo(nsCString* const out) const override;

    // Overrides the current GLXDrawable backing the context and makes the

    // context current.

    bool OverrideDrawable(GLXDrawable drawable);

    // Undoes the effect of a drawable override.

    bool RestoreDrawable();

private:

    friend class GLContextProviderGLX;

    GLContextGLX(CreateContextFlags flags,

                 const SurfaceCaps& caps,

                 bool isOffscreen,

                 Display* aDisplay,

                 GLXDrawable aDrawable,

                 GLXContext aContext,

                 bool aDeleteDrawable,

                 bool aDoubleBuffered,

                 gfxXlibSurface* aPixmap);

    GLXContext mContext;

    Display* mDisplay;

    GLXDrawable mDrawable;

    bool mDeleteDrawable;

    bool mDoubleBuffered;

    GLXLibrary* mGLX;

    RefPtr<gfxXlibSurface> mPixmap;

    bool mOwnsContext = true;

};

}

}

#endif // GLCONTEXTGLX_H_