GLContextEGL.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 GLCONTEXTEGL_H_

#define GLCONTEXTEGL_H_

#include "GLContext.h"

#include "GLLibraryEGL.h"

#include "nsRegion.h"

#include <memory>

namespace mozilla {

namespace layers {

class SurfaceTextureImage;

}  // namespace layers

namespace widget {

class CompositorWidget;

}  // namespace widget

namespace gl {

inline std::shared_ptr<EglDisplay> DefaultEglDisplay(

    nsACString* const out_failureId) {

  const auto lib = GLLibraryEGL::Get(out_failureId);

  if (!lib) {

    return nullptr;

  return lib->DefaultDisplay(out_failureId);

// -

class GLContextEGL final : public GLContext {

 public:

  MOZ_DECLARE_REFCOUNTED_VIRTUAL_TYPENAME(GLContextEGL, override)

  static RefPtr<GLContextEGL> CreateGLContext(

      std::shared_ptr<EglDisplay>, const GLContextDesc&,

      EGLConfig surfaceConfig, EGLSurface surface, const bool useGles,

      EGLConfig contextConfig, nsACString* const out_failureId);

 private:

  GLContextEGL(std::shared_ptr<EglDisplay>, const GLContextDesc&,

               EGLConfig surfaceConfig, EGLSurface surface, EGLContext context);

  ~GLContextEGL();

 public:

  virtual GLContextType GetContextType() const override {

    return GLContextType::EGL;

  static GLContextEGL* Cast(GLContext* gl) {

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

    return static_cast<GLContextEGL*>(gl);

  bool Init() override;

  virtual bool IsDoubleBuffered() const override { return mIsDoubleBuffered; }

  void SetIsDoubleBuffered(bool aIsDB) { mIsDoubleBuffered = aIsDB; }

  virtual bool IsANGLE() const override { return mEgl->mLib->IsANGLE(); }

  virtual bool IsWARP() const override { return mEgl->mIsWARP; }

  virtual bool BindTexImage() override;

  virtual bool ReleaseTexImage() override;

  void SetEGLSurfaceOverride(EGLSurface surf);

  EGLSurface GetEGLSurfaceOverride() { return mSurfaceOverride; }

  virtual bool MakeCurrentImpl() const override;

  virtual bool IsCurrentImpl() const override;

  virtual bool RenewSurface(widget::CompositorWidget* aWidget) override;

  virtual void ReleaseSurface() override;

  Maybe<SymbolLoader> GetSymbolLoader() const override;

  virtual bool SwapBuffers() override;

  virtual void SetDamage(const nsIntRegion& aDamageRegion) override;

  GLint GetBufferAge() const override;

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

  EGLSurface GetEGLSurface() const { return mSurface; }

  bool HasExtBufferAge() const;

  bool HasKhrPartialUpdate() const;

  bool BindTex2DOffscreen(GLContext* aOffscreen);

  void UnbindTex2DOffscreen(GLContext* aOffscreen);

  void BindOffscreenFramebuffer();

  void Destroy();

  static RefPtr<GLContextEGL> CreateWithoutSurface(

      std::shared_ptr<EglDisplay>, const GLContextCreateDesc&,

      nsACString* const out_FailureId);

  static RefPtr<GLContextEGL> CreateEGLSurfacelessContext(

      const std::shared_ptr<EglDisplay> display,

      const GLContextCreateDesc& desc, nsACString* const out_failureId);

  static EGLSurface CreateEGLSurfaceForCompositorWidget(

      widget::CompositorWidget* aCompositorWidget, const EGLConfig aConfig);

  static void DestroySurface(EglDisplay&, const EGLSurface aSurface);

#ifdef MOZ_X11

  static bool FindVisual(int* const out_visualId);

#endif

 protected:

  friend class GLContextProviderEGL;

  friend class GLContextEGLFactory;

  virtual void OnMarkDestroyed() override;

 public:

  const std::shared_ptr<EglDisplay> mEgl;

  const EGLConfig mSurfaceConfig;

  const EGLContext mContext;

 protected:

  EGLSurface mSurface;

  const EGLSurface mFallbackSurface;

  EGLSurface mSurfaceOverride = EGL_NO_SURFACE;

  bool mBound = false;

  bool mIsPBuffer = false;

  bool mIsDoubleBuffered = false;

  bool mCanBindToTexture = false;

  bool mShareWithEGLImage = false;

  bool mOwnsContext = true;

  nsIntRegion mDamageRegion;

  static EGLSurface CreatePBufferSurfaceTryingPowerOfTwo(

      EglDisplay&, EGLConfig, EGLenum bindToTextureFormat,

      gfx::IntSize& pbsize);

#ifdef MOZ_WAYLAND

  static EGLSurface CreateWaylandOffscreenSurface(EglDisplay&, EGLConfig,

                                                  gfx::IntSize& pbsize);

#endif

 public:

  EGLSurface CreateCompatibleSurface(void* aWindow) const;

};

bool CreateConfig(EglDisplay&, EGLConfig* aConfig, int32_t aDepth,

                  bool aEnableDepthBuffer, bool aUseGles,

                  bool aAllowFallback = true);

}  // namespace gl

}  // namespace mozilla

#endif  // GLCONTEXTEGL_H_