GLContextGLX.h - mozsearch

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 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"

namespace mozilla {

namespace gl {

class GLContextGLX : public GLContext {

 public:

  MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(GLContextGLX, override)

  static already_AddRefed<GLContextGLX> CreateGLContext(

      const GLContextDesc&, std::shared_ptr<gfx::XlibDisplay> display,

      GLXDrawable drawable, GLXFBConfig cfg, Drawable ownedPixmap = X11None);

  static bool FindVisual(Display* display, int screen, int* const out_visualId);

  // Finds a GLXFBConfig compatible with the provided window.

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

                                    GLXFBConfig* const out_config,

                                    int* const out_visid, bool aWebRender);

  virtual ~GLContextGLX();

  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;

  bool MakeCurrentImpl() const override;

  bool IsCurrentImpl() const override;

  Maybe<SymbolLoader> GetSymbolLoader() const override;

  bool IsDoubleBuffered() const override;

  bool SwapBuffers() override;

  GLint GetBufferAge() const override;

  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(const GLContextDesc&, std::shared_ptr<gfx::XlibDisplay> aDisplay,

               GLXDrawable aDrawable, GLXContext aContext, bool aDoubleBuffered,

               Drawable aOwnedPixmap = X11None);

  const GLXContext mContext;

  const std::shared_ptr<gfx::XlibDisplay> mDisplay;

  const GLXDrawable mDrawable;

  // The X pixmap associated with the GLX pixmap. If this is provided, then this

  // class assumes responsibility for freeing both. Otherwise, the user of this

  // class is responsibility for freeing the drawables.

  const Drawable mOwnedPixmap;

  const bool mDoubleBuffered;

  GLXLibrary* const mGLX;

  const bool mOwnsContext = true;

};

}  // namespace gl

}  // namespace mozilla

#endif  // GLCONTEXTGLX_H_