gecko-dev/gfx/gl/GLLibraryEGL.h

/* 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 GLLIBRARYEGL_H_
#define GLLIBRARYEGL_H_

#if defined(MOZ_X11)
#  include "mozilla/X11Util.h"
#endif

#include "GLLibraryLoader.h"
#include "mozilla/StaticMutex.h"
#include "mozilla/ThreadLocal.h"
#include "nsIFile.h"
#include "GeckoProfiler.h"

#include <bitset>
#include <vector>

#if defined(MOZ_X11)
#  define EGL_DEFAULT_DISPLAY ((EGLNativeDisplayType)mozilla::DefaultXDisplay())
#else
#  define EGL_DEFAULT_DISPLAY ((EGLNativeDisplayType)0)
#endif

class nsIGfxInfo;

namespace angle {
class Platform;
}

namespace mozilla {

namespace gfx {
class DataSourceSurface;
}

namespace gl {

class GLContext;
PRLibrary* LoadApitraceLibrary();

void BeforeEGLCall(const char* funcName);
void AfterEGLCall(const char* funcName);

class GLLibraryEGL final {
 protected:
  ~GLLibraryEGL() {}

 public:
  NS_INLINE_DECL_THREADSAFE_REFCOUNTING(GLLibraryEGL)

  void InitClientExtensions();
  void InitDisplayExtensions();

  /**
   * Known GL extensions that can be queried by
   * IsExtensionSupported.  The results of this are cached, and as
   * such it's safe to use this even in performance critical code.
   * If you add to this array, remember to add to the string names
   * in GLLibraryEGL.cpp.
   */
  enum EGLExtensions {
    KHR_image_base,
    KHR_image_pixmap,
    KHR_gl_texture_2D_image,
    KHR_lock_surface,
    ANGLE_surface_d3d_texture_2d_share_handle,
    EXT_create_context_robustness,
    KHR_image,
    KHR_fence_sync,
    ANDROID_native_fence_sync,
    EGL_ANDROID_image_crop,
    ANGLE_platform_angle,
    ANGLE_platform_angle_d3d,
    ANGLE_d3d_share_handle_client_buffer,
    KHR_create_context,
    KHR_stream,
    KHR_stream_consumer_gltexture,
    EXT_device_query,
    NV_stream_consumer_gltexture_yuv,
    ANGLE_stream_producer_d3d_texture,
    ANGLE_device_creation,
    ANGLE_device_creation_d3d11,
    KHR_surfaceless_context,
    KHR_create_context_no_error,
    MOZ_create_context_provoking_vertex_dont_care,
    Extensions_Max
  };

  bool IsExtensionSupported(EGLExtensions aKnownExtension) const {
    return mAvailableExtensions[aKnownExtension];
  }

  void MarkExtensionUnsupported(EGLExtensions aKnownExtension) {
    mAvailableExtensions[aKnownExtension] = false;
  }

 protected:
  std::bitset<Extensions_Max> mAvailableExtensions;

 public:
  ////

#ifdef MOZ_WIDGET_ANDROID
#  define PROFILE_CALL AUTO_PROFILER_LABEL(__func__, GRAPHICS);
#else
#  define PROFILE_CALL
#endif

#ifndef MOZ_FUNCTION_NAME
#  ifdef __GNUC__
#    define MOZ_FUNCTION_NAME __PRETTY_FUNCTION__
#  elif defined(_MSC_VER)
#    define MOZ_FUNCTION_NAME __FUNCTION__
#  else
#    define MOZ_FUNCTION_NAME \
      __func__  // defined in C99, supported in various C++ compilers. Just raw
                // function name.
#  endif
#endif

#ifdef DEBUG
#  define BEFORE_CALL BeforeEGLCall(MOZ_FUNCTION_NAME);
#  define AFTER_CALL AfterEGLCall(MOZ_FUNCTION_NAME);
#else
#  define BEFORE_CALL
#  define AFTER_CALL
#endif

#define WRAP(X)                  \
  {                              \
    PROFILE_CALL                 \
    BEFORE_CALL                  \
    const auto ret = mSymbols.X; \
    AFTER_CALL                   \
    return ret;                  \
  }

#define VOID_WRAP(X) \
  {                  \
    PROFILE_CALL     \
    BEFORE_CALL      \
    mSymbols.X;      \
    AFTER_CALL       \
  }

  EGLDisplay fGetDisplay(void* display_id) const WRAP(fGetDisplay(display_id))

      EGLDisplay fGetPlatformDisplayEXT(EGLenum platform, void* native_display,
                                        const EGLint* attrib_list) const
      WRAP(fGetPlatformDisplayEXT(platform, native_display, attrib_list))

          EGLBoolean fTerminate(EGLDisplay display) const
      WRAP(fTerminate(display))

          EGLSurface fGetCurrentSurface(EGLint id) const
      WRAP(fGetCurrentSurface(id))

          EGLContext fGetCurrentContext() const WRAP(fGetCurrentContext())

              EGLBoolean fMakeCurrent(EGLDisplay dpy, EGLSurface draw,
                                      EGLSurface read, EGLContext ctx) const
      WRAP(fMakeCurrent(dpy, draw, read, ctx))

          EGLBoolean fDestroyContext(EGLDisplay dpy, EGLContext ctx) const
      WRAP(fDestroyContext(dpy, ctx))

          EGLContext
      fCreateContext(EGLDisplay dpy, EGLConfig config, EGLContext share_context,
                     const EGLint* attrib_list) const
      WRAP(fCreateContext(dpy, config, share_context, attrib_list))

          EGLBoolean fDestroySurface(EGLDisplay dpy, EGLSurface surface) const
      WRAP(fDestroySurface(dpy, surface))

          EGLSurface fCreateWindowSurface(EGLDisplay dpy, EGLConfig config,
                                          EGLNativeWindowType win,
                                          const EGLint* attrib_list) const
      WRAP(fCreateWindowSurface(dpy, config, win, attrib_list))

          EGLSurface fCreatePbufferSurface(EGLDisplay dpy, EGLConfig config,
                                           const EGLint* attrib_list) const
      WRAP(fCreatePbufferSurface(dpy, config, attrib_list))

          EGLSurface
      fCreatePbufferFromClientBuffer(EGLDisplay dpy, EGLenum buftype,
                                     EGLClientBuffer buffer, EGLConfig config,
                                     const EGLint* attrib_list) const
      WRAP(fCreatePbufferFromClientBuffer(dpy, buftype, buffer, config,
                                          attrib_list))

          EGLSurface fCreatePixmapSurface(EGLDisplay dpy, EGLConfig config,
                                          EGLNativePixmapType pixmap,
                                          const EGLint* attrib_list) const
      WRAP(fCreatePixmapSurface(dpy, config, pixmap, attrib_list))

          EGLBoolean fBindAPI(EGLenum api) const WRAP(fBindAPI(api))

              EGLBoolean
      fInitialize(EGLDisplay dpy, EGLint* major, EGLint* minor) const
      WRAP(fInitialize(dpy, major, minor))

          EGLBoolean fChooseConfig(EGLDisplay dpy, const EGLint* attrib_list,
                                   EGLConfig* configs, EGLint config_size,
                                   EGLint* num_config) const
      WRAP(fChooseConfig(dpy, attrib_list, configs, config_size, num_config))

          EGLint fGetError() const WRAP(fGetError())

              EGLBoolean fGetConfigAttrib(EGLDisplay dpy, EGLConfig config,
                                          EGLint attribute, EGLint* value) const
      WRAP(fGetConfigAttrib(dpy, config, attribute, value))

          EGLBoolean fGetConfigs(EGLDisplay dpy, EGLConfig* configs,
                                 EGLint config_size, EGLint* num_config) const
      WRAP(fGetConfigs(dpy, configs, config_size, num_config))

          EGLBoolean fWaitNative(EGLint engine) const WRAP(fWaitNative(engine))

              EGLCastToRelevantPtr fGetProcAddress(const char* procname) const
      WRAP(fGetProcAddress(procname))

          EGLBoolean fSwapBuffers(EGLDisplay dpy, EGLSurface surface) const
      WRAP(fSwapBuffers(dpy, surface))

          EGLBoolean fCopyBuffers(EGLDisplay dpy, EGLSurface surface,
                                  EGLNativePixmapType target) const
      WRAP(fCopyBuffers(dpy, surface, target))

          const GLubyte* fQueryString(EGLDisplay dpy, EGLint name) const
      WRAP(fQueryString(dpy, name))

          EGLBoolean fQueryContext(EGLDisplay dpy, EGLContext ctx,
                                   EGLint attribute, EGLint* value) const
      WRAP(fQueryContext(dpy, ctx, attribute, value))

          EGLBoolean
      fBindTexImage(EGLDisplay dpy, EGLSurface surface, EGLint buffer) const
      WRAP(fBindTexImage(dpy, surface, buffer))

          EGLBoolean
      fReleaseTexImage(EGLDisplay dpy, EGLSurface surface, EGLint buffer) const
      WRAP(fReleaseTexImage(dpy, surface, buffer))

          EGLBoolean fSwapInterval(EGLDisplay dpy, EGLint interval) const
      WRAP(fSwapInterval(dpy, interval))

          EGLImage
      fCreateImage(EGLDisplay dpy, EGLContext ctx, EGLenum target,
                   EGLClientBuffer buffer, const EGLint* attrib_list) const
      WRAP(fCreateImageKHR(dpy, ctx, target, buffer, attrib_list))

          EGLBoolean fDestroyImage(EGLDisplay dpy, EGLImage image) const
      WRAP(fDestroyImageKHR(dpy, image))

          EGLBoolean fLockSurface(EGLDisplay dpy, EGLSurface surface,
                                  const EGLint* attrib_list) const
      WRAP(fLockSurfaceKHR(dpy, surface, attrib_list))

          EGLBoolean fUnlockSurface(EGLDisplay dpy, EGLSurface surface) const
      WRAP(fUnlockSurfaceKHR(dpy, surface))

          EGLBoolean fQuerySurface(EGLDisplay dpy, EGLSurface surface,
                                   EGLint attribute, EGLint* value) const
      WRAP(fQuerySurface(dpy, surface, attribute, value))

          EGLBoolean
      fQuerySurfacePointerANGLE(EGLDisplay dpy, EGLSurface surface,
                                EGLint attribute, void** value) const
      WRAP(fQuerySurfacePointerANGLE(dpy, surface, attribute, value))

          EGLSync
      fCreateSync(EGLDisplay dpy, EGLenum type, const EGLint* attrib_list) const
      WRAP(fCreateSyncKHR(dpy, type, attrib_list))

          EGLBoolean fDestroySync(EGLDisplay dpy, EGLSync sync) const
      WRAP(fDestroySyncKHR(dpy, sync))

          EGLint fClientWaitSync(EGLDisplay dpy, EGLSync sync, EGLint flags,
                                 EGLTime timeout) const
      WRAP(fClientWaitSyncKHR(dpy, sync, flags, timeout))

          EGLBoolean fGetSyncAttrib(EGLDisplay dpy, EGLSync sync,
                                    EGLint attribute, EGLint* value) const
      WRAP(fGetSyncAttribKHR(dpy, sync, attribute, value))

          EGLint fDupNativeFenceFDANDROID(EGLDisplay dpy, EGLSync sync) const
      WRAP(fDupNativeFenceFDANDROID(dpy, sync))

      // KHR_stream
      EGLStreamKHR
      fCreateStreamKHR(EGLDisplay dpy, const EGLint* attrib_list) const
      WRAP(fCreateStreamKHR(dpy, attrib_list))

          EGLBoolean
      fDestroyStreamKHR(EGLDisplay dpy, EGLStreamKHR stream) const
      WRAP(fDestroyStreamKHR(dpy, stream))

          EGLBoolean fQueryStreamKHR(EGLDisplay dpy, EGLStreamKHR stream,
                                     EGLenum attribute, EGLint* value) const
      WRAP(fQueryStreamKHR(dpy, stream, attribute, value))

      // KHR_stream_consumer_gltexture
      EGLBoolean fStreamConsumerGLTextureExternalKHR(EGLDisplay dpy,
                                                     EGLStreamKHR stream) const
      WRAP(fStreamConsumerGLTextureExternalKHR(dpy, stream))

          EGLBoolean
      fStreamConsumerAcquireKHR(EGLDisplay dpy, EGLStreamKHR stream) const
      WRAP(fStreamConsumerAcquireKHR(dpy, stream))

          EGLBoolean
      fStreamConsumerReleaseKHR(EGLDisplay dpy, EGLStreamKHR stream) const
      WRAP(fStreamConsumerReleaseKHR(dpy, stream))

      // EXT_device_query
      EGLBoolean fQueryDisplayAttribEXT(EGLDisplay dpy, EGLint attribute,
                                        EGLAttrib* value) const
      WRAP(fQueryDisplayAttribEXT(dpy, attribute, value))

          EGLBoolean
      fQueryDeviceAttribEXT(EGLDeviceEXT device, EGLint attribute,
                            EGLAttrib* value) const
      WRAP(fQueryDeviceAttribEXT(device, attribute, value))

      // NV_stream_consumer_gltexture_yuv
      EGLBoolean fStreamConsumerGLTextureExternalAttribsNV(
          EGLDisplay dpy, EGLStreamKHR stream,
          const EGLAttrib* attrib_list) const
      WRAP(fStreamConsumerGLTextureExternalAttribsNV(dpy, stream, attrib_list))

      // ANGLE_stream_producer_d3d_texture
      EGLBoolean
      fCreateStreamProducerD3DTextureANGLE(EGLDisplay dpy, EGLStreamKHR stream,
                                           const EGLAttrib* attrib_list) const
      WRAP(fCreateStreamProducerD3DTextureANGLE(dpy, stream, attrib_list))

          EGLBoolean
      fStreamPostD3DTextureANGLE(EGLDisplay dpy, EGLStreamKHR stream,
                                 void* texture,
                                 const EGLAttrib* attrib_list) const
      WRAP(fStreamPostD3DTextureANGLE(dpy, stream, texture, attrib_list))

      // ANGLE_device_creation
      EGLDeviceEXT fCreateDeviceANGLE(EGLint device_type, void* native_device,
                                      const EGLAttrib* attrib_list) const
      WRAP(fCreateDeviceANGLE(device_type, native_device, attrib_list))

          EGLBoolean fReleaseDeviceANGLE(EGLDeviceEXT device)
              WRAP(fReleaseDeviceANGLE(device))
#undef WRAP
#undef VOID_WRAP
#undef PROFILE_CALL
#undef BEFORE_CALL
#undef AFTER_CALL
#undef MOZ_FUNCTION_NAME

      ////

      EGLDisplay Display() const {
    MOZ_ASSERT(mInitialized);
    return mEGLDisplay;
  }

  bool IsANGLE() const {
    MOZ_ASSERT(mInitialized);
    return mIsANGLE;
  }

  bool IsWARP() const {
    MOZ_ASSERT(mInitialized);
    return mIsWARP;
  }

  bool HasKHRImageBase() {
    return IsExtensionSupported(KHR_image) ||
           IsExtensionSupported(KHR_image_base);
  }

  bool HasKHRImagePixmap() {
    return IsExtensionSupported(KHR_image) ||
           IsExtensionSupported(KHR_image_pixmap);
  }

  bool HasKHRImageTexture2D() {
    return IsExtensionSupported(KHR_gl_texture_2D_image);
  }

  bool HasANGLESurfaceD3DTexture2DShareHandle() {
    return IsExtensionSupported(ANGLE_surface_d3d_texture_2d_share_handle);
  }

  bool ReadbackEGLImage(EGLImage image, gfx::DataSourceSurface* out_surface);

  inline static GLLibraryEGL* Get() { return sEGLLibrary; }

  static bool EnsureInitialized(bool forceAccel,
                                nsACString* const out_failureId);

  void Shutdown();

  void DumpEGLConfig(EGLConfig cfg);
  void DumpEGLConfigs();

  Maybe<SymbolLoader> GetSymbolLoader() const;

 private:
  struct {
    EGLCastToRelevantPtr(GLAPIENTRY* fGetProcAddress)(const char* procname);
    EGLDisplay(GLAPIENTRY* fGetDisplay)(void* display_id);
    EGLDisplay(GLAPIENTRY* fGetPlatformDisplayEXT)(EGLenum platform,
                                                   void* native_display,
                                                   const EGLint* attrib_list);
    EGLBoolean(GLAPIENTRY* fTerminate)(EGLDisplay dpy);
    EGLSurface(GLAPIENTRY* fGetCurrentSurface)(EGLint);
    EGLContext(GLAPIENTRY* fGetCurrentContext)(void);
    EGLBoolean(GLAPIENTRY* fMakeCurrent)(EGLDisplay dpy, EGLSurface draw,
                                         EGLSurface read, EGLContext ctx);
    EGLBoolean(GLAPIENTRY* fDestroyContext)(EGLDisplay dpy, EGLContext ctx);
    EGLContext(GLAPIENTRY* fCreateContext)(EGLDisplay dpy, EGLConfig config,
                                           EGLContext share_context,
                                           const EGLint* attrib_list);
    EGLBoolean(GLAPIENTRY* fDestroySurface)(EGLDisplay dpy, EGLSurface surface);
    EGLSurface(GLAPIENTRY* fCreateWindowSurface)(EGLDisplay dpy,
                                                 EGLConfig config,
                                                 EGLNativeWindowType win,
                                                 const EGLint* attrib_list);
    EGLSurface(GLAPIENTRY* fCreatePbufferSurface)(EGLDisplay dpy,
                                                  EGLConfig config,
                                                  const EGLint* attrib_list);
    EGLSurface(GLAPIENTRY* fCreatePbufferFromClientBuffer)(
        EGLDisplay dpy, EGLenum buftype, EGLClientBuffer buffer,
        EGLConfig config, const EGLint* attrib_list);
    EGLSurface(GLAPIENTRY* fCreatePixmapSurface)(EGLDisplay dpy,
                                                 EGLConfig config,
                                                 EGLNativePixmapType pixmap,
                                                 const EGLint* attrib_list);
    EGLBoolean(GLAPIENTRY* fBindAPI)(EGLenum api);
    EGLBoolean(GLAPIENTRY* fInitialize)(EGLDisplay dpy, EGLint* major,
                                        EGLint* minor);
    EGLBoolean(GLAPIENTRY* fChooseConfig)(EGLDisplay dpy,
                                          const EGLint* attrib_list,
                                          EGLConfig* configs,
                                          EGLint config_size,
                                          EGLint* num_config);
    EGLint(GLAPIENTRY* fGetError)(void);
    EGLBoolean(GLAPIENTRY* fGetConfigAttrib)(EGLDisplay dpy, EGLConfig config,
                                             EGLint attribute, EGLint* value);
    EGLBoolean(GLAPIENTRY* fGetConfigs)(EGLDisplay dpy, EGLConfig* configs,
                                        EGLint config_size, EGLint* num_config);
    EGLBoolean(GLAPIENTRY* fWaitNative)(EGLint engine);
    EGLBoolean(GLAPIENTRY* fSwapBuffers)(EGLDisplay dpy, EGLSurface surface);
    EGLBoolean(GLAPIENTRY* fCopyBuffers)(EGLDisplay dpy, EGLSurface surface,
                                         EGLNativePixmapType target);
    const GLubyte*(GLAPIENTRY* fQueryString)(EGLDisplay, EGLint name);
    EGLBoolean(GLAPIENTRY* fQueryContext)(EGLDisplay dpy, EGLContext ctx,
                                          EGLint attribute, EGLint* value);
    EGLBoolean(GLAPIENTRY* fBindTexImage)(EGLDisplay, EGLSurface surface,
                                          EGLint buffer);
    EGLBoolean(GLAPIENTRY* fReleaseTexImage)(EGLDisplay, EGLSurface surface,
                                             EGLint buffer);
    EGLBoolean(GLAPIENTRY* fSwapInterval)(EGLDisplay dpy, EGLint interval);
    EGLImage(GLAPIENTRY* fCreateImageKHR)(EGLDisplay dpy, EGLContext ctx,
                                          EGLenum target,
                                          EGLClientBuffer buffer,
                                          const EGLint* attrib_list);
    EGLBoolean(GLAPIENTRY* fDestroyImageKHR)(EGLDisplay dpy, EGLImage image);
    // New extension which allow us to lock texture and get raw image pointer
    EGLBoolean(GLAPIENTRY* fLockSurfaceKHR)(EGLDisplay dpy, EGLSurface surface,
                                            const EGLint* attrib_list);
    EGLBoolean(GLAPIENTRY* fUnlockSurfaceKHR)(EGLDisplay dpy,
                                              EGLSurface surface);
    EGLBoolean(GLAPIENTRY* fQuerySurface)(EGLDisplay dpy, EGLSurface surface,
                                          EGLint attribute, EGLint* value);
    EGLBoolean(GLAPIENTRY* fQuerySurfacePointerANGLE)(EGLDisplay dpy,
                                                      EGLSurface surface,
                                                      EGLint attribute,
                                                      void** value);
    EGLSync(GLAPIENTRY* fCreateSyncKHR)(EGLDisplay dpy, EGLenum type,
                                        const EGLint* attrib_list);
    EGLBoolean(GLAPIENTRY* fDestroySyncKHR)(EGLDisplay dpy, EGLSync sync);
    EGLint(GLAPIENTRY* fClientWaitSyncKHR)(EGLDisplay dpy, EGLSync sync,
                                           EGLint flags, EGLTime timeout);
    EGLBoolean(GLAPIENTRY* fGetSyncAttribKHR)(EGLDisplay dpy, EGLSync sync,
                                              EGLint attribute, EGLint* value);
    EGLint(GLAPIENTRY* fDupNativeFenceFDANDROID)(EGLDisplay dpy, EGLSync sync);
    // KHR_stream
    EGLStreamKHR(GLAPIENTRY* fCreateStreamKHR)(EGLDisplay dpy,
                                               const EGLint* attrib_list);
    EGLBoolean(GLAPIENTRY* fDestroyStreamKHR)(EGLDisplay dpy,
                                              EGLStreamKHR stream);
    EGLBoolean(GLAPIENTRY* fQueryStreamKHR)(EGLDisplay dpy, EGLStreamKHR stream,
                                            EGLenum attribute, EGLint* value);
    // KHR_stream_consumer_gltexture
    EGLBoolean(GLAPIENTRY* fStreamConsumerGLTextureExternalKHR)(
        EGLDisplay dpy, EGLStreamKHR stream);
    EGLBoolean(GLAPIENTRY* fStreamConsumerAcquireKHR)(EGLDisplay dpy,
                                                      EGLStreamKHR stream);
    EGLBoolean(GLAPIENTRY* fStreamConsumerReleaseKHR)(EGLDisplay dpy,
                                                      EGLStreamKHR stream);
    // EXT_device_query
    EGLBoolean(GLAPIENTRY* fQueryDisplayAttribEXT)(EGLDisplay dpy,
                                                   EGLint attribute,
                                                   EGLAttrib* value);
    EGLBoolean(GLAPIENTRY* fQueryDeviceAttribEXT)(EGLDeviceEXT device,
                                                  EGLint attribute,
                                                  EGLAttrib* value);
    // NV_stream_consumer_gltexture_yuv
    EGLBoolean(GLAPIENTRY* fStreamConsumerGLTextureExternalAttribsNV)(
        EGLDisplay dpy, EGLStreamKHR stream, const EGLAttrib* attrib_list);
    // ANGLE_stream_producer_d3d_texture
    EGLBoolean(GLAPIENTRY* fCreateStreamProducerD3DTextureANGLE)(
        EGLDisplay dpy, EGLStreamKHR stream, const EGLAttrib* attrib_list);
    EGLBoolean(GLAPIENTRY* fStreamPostD3DTextureANGLE)(
        EGLDisplay dpy, EGLStreamKHR stream, void* texture,
        const EGLAttrib* attrib_list);
    // ANGLE_device_creation
    EGLDeviceEXT(GLAPIENTRY* fCreateDeviceANGLE)(EGLint device_type,
                                                 void* native_device,
                                                 const EGLAttrib* attrib_list);
    EGLBoolean(GLAPIENTRY* fReleaseDeviceANGLE)(EGLDeviceEXT device);

  } mSymbols = {};

 private:
  bool DoEnsureInitialized();
  bool DoEnsureInitialized(bool forceAccel, nsACString* const out_failureId);
  EGLDisplay CreateDisplay(bool forceAccel, const nsCOMPtr<nsIGfxInfo>& gfxInfo,
                           nsACString* const out_failureId);

  bool mInitialized = false;
  PRLibrary* mEGLLibrary = nullptr;
  mutable PRLibrary* mGLLibrary = nullptr;
  EGLDisplay mEGLDisplay = EGL_NO_DISPLAY;
  RefPtr<GLContext> mReadbackGL;

  bool mIsANGLE = false;
  bool mIsWARP = false;
  static StaticMutex sMutex;
  static StaticRefPtr<GLLibraryEGL> sEGLLibrary;
};

bool DoesEGLContextSupportSharingWithEGLImage(GLContext* gl);

} /* namespace gl */
} /* namespace mozilla */

#endif /* GLLIBRARYEGL_H_ */