/* 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 GLCONTEXTCGL_H_
#define GLCONTEXTCGL_H_

#include "GLContext.h"

#include "OpenGL/OpenGL.h"

#ifdef __OBJC__
#  include <AppKit/NSOpenGL.h>
#else
typedef void NSOpenGLContext;
#endif

#include <CoreGraphics/CGDisplayConfiguration.h>

#include "mozilla/Atomics.h"

class nsIWidget;

namespace mozilla {
namespace gl {

class GLContextCGL : public GLContext {
  friend class GLContextProviderCGL;

  NSOpenGLContext* mContext;

  mozilla::Atomic<bool> mActiveGPUSwitchMayHaveOccurred;

 public:
  MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(GLContextCGL, override)
  GLContextCGL(const GLContextDesc&, NSOpenGLContext* context);

  ~GLContextCGL();

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

  static GLContextCGL* Cast(GLContext* gl) {
    MOZ_RELEASE_ASSERT(gl->GetContextType() == GLContextType::CGL);
    return static_cast<GLContextCGL*>(gl);
  }

  NSOpenGLContext* GetNSOpenGLContext() const { return mContext; }
  CGLContextObj GetCGLContext() const;

  // Can be called on any thread
  static void DisplayReconfigurationCallback(CGDirectDisplayID aDisplay,
                                             CGDisplayChangeSummaryFlags aFlags,
                                             void* aUserInfo);

  // Call at the beginning of a frame, on contexts that should stay on the
  // active GPU. This method will migrate the context to the new active GPU, if
  // the active GPU has changed since the last call.
  void MigrateToActiveGPU();

  virtual bool MakeCurrentImpl() const override;

  virtual bool IsCurrentImpl() const override;

  virtual GLenum GetPreferredARGB32Format() const override;

  virtual bool SwapBuffers() override;

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

  Maybe<SymbolLoader> GetSymbolLoader() const override;

  GLenum GetPreferredMacIOSurfaceTextureTarget() const override {
    return LOCAL_GL_TEXTURE_RECTANGLE_ARB;
  }
};

}  // namespace gl
}  // namespace mozilla

#endif  // GLCONTEXTCGL_H_