Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1036 insertions, 0 deletions

diff --git a/gfx/gl/GLLibraryEGL.cpp b/gfx/gl/GLLibraryEGL.cpp
new file mode 100644
index 0000000000..7a14a45862
--- /dev/null
+++ b/gfx/gl/GLLibraryEGL.cpp
@@ -0,0 +1,1036 @@
+/* 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/. */
+
+#include "GLLibraryEGL.h"
+
+#include "gfxConfig.h"
+#include "gfxCrashReporterUtils.h"
+#include "gfxEnv.h"
+#include "gfxUtils.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/Assertions.h"
+#include "mozilla/gfx/gfxVars.h"
+#include "mozilla/gfx/Logging.h"
+#include "mozilla/Telemetry.h"
+#include "mozilla/Tokenizer.h"
+#include "mozilla/ScopeExit.h"
+#include "mozilla/StaticPrefs_gfx.h"
+#include "mozilla/StaticPrefs_webgl.h"
+#include "mozilla/Unused.h"
+#include "nsDirectoryServiceDefs.h"
+#include "nsDirectoryServiceUtils.h"
+#include "nsPrintfCString.h"
+#ifdef XP_WIN
+#  include "mozilla/gfx/DeviceManagerDx.h"
+#  include "nsWindowsHelpers.h"
+
+#  include <d3d11.h>
+#endif
+#include "OGLShaderProgram.h"
+#include "prenv.h"
+#include "prsystem.h"
+#include "GLContext.h"
+#include "GLContextProvider.h"
+#include "GLLibraryLoader.h"
+#include "GLReadTexImageHelper.h"
+#include "ScopedGLHelpers.h"
+#ifdef MOZ_WIDGET_GTK
+#  include "mozilla/WidgetUtilsGtk.h"
+#  ifdef MOZ_WAYLAND
+#    include "mozilla/widget/nsWaylandDisplay.h"
+#    include "mozilla/widget/DMABufLibWrapper.h"
+#  endif  // MOZ_WIDGET_GTK
+#  include <gdk/gdk.h>
+#endif  // MOZ_WAYLAND
+
+#include <mutex>  // for call_once
+
+namespace mozilla {
+namespace gl {
+
+StaticMutex GLLibraryEGL::sMutex;
+StaticRefPtr<GLLibraryEGL> GLLibraryEGL::sInstance;
+
+// should match the order of EGLExtensions, and be null-terminated.
+static const char* sEGLLibraryExtensionNames[] = {
+    "EGL_ANDROID_get_native_client_buffer",
+    "EGL_ANGLE_device_creation",
+    "EGL_ANGLE_device_creation_d3d11",
+    "EGL_ANGLE_platform_angle",
+    "EGL_ANGLE_platform_angle_d3d",
+    "EGL_EXT_device_enumeration",
+    "EGL_EXT_device_query",
+    "EGL_EXT_platform_device",
+    "EGL_MESA_platform_surfaceless"};
+
+// should match the order of EGLExtensions, and be null-terminated.
+static const char* sEGLExtensionNames[] = {
+    "EGL_KHR_image_base",
+    "EGL_KHR_image_pixmap",
+    "EGL_KHR_gl_texture_2D_image",
+    "EGL_ANGLE_surface_d3d_texture_2d_share_handle",
+    "EGL_EXT_create_context_robustness",
+    "EGL_KHR_image",
+    "EGL_KHR_fence_sync",
+    "EGL_KHR_wait_sync",
+    "EGL_ANDROID_native_fence_sync",
+    "EGL_ANDROID_image_crop",
+    "EGL_ANGLE_d3d_share_handle_client_buffer",
+    "EGL_KHR_create_context",
+    "EGL_KHR_stream",
+    "EGL_KHR_stream_consumer_gltexture",
+    "EGL_NV_stream_consumer_gltexture_yuv",
+    "EGL_ANGLE_stream_producer_d3d_texture",
+    "EGL_KHR_surfaceless_context",
+    "EGL_KHR_create_context_no_error",
+    "EGL_MOZ_create_context_provoking_vertex_dont_care",
+    "EGL_EXT_swap_buffers_with_damage",
+    "EGL_KHR_swap_buffers_with_damage",
+    "EGL_EXT_buffer_age",
+    "EGL_KHR_partial_update",
+    "EGL_NV_robustness_video_memory_purge",
+    "EGL_EXT_image_dma_buf_import",
+    "EGL_EXT_image_dma_buf_import_modifiers",
+    "EGL_MESA_image_dma_buf_export"};
+
+PRLibrary* LoadApitraceLibrary() {
+  const char* path = nullptr;
+
+#ifdef ANDROID
+  // We only need to explicitly dlopen egltrace
+  // on android as we can use LD_PRELOAD or other tricks
+  // on other platforms. We look for it in /data/local
+  // as that's writeable by all users.
+  path = "/data/local/tmp/egltrace.so";
+#endif
+  if (!path) return nullptr;
+
+  // Initialization of gfx prefs here is only needed during the unit tests...
+  if (!StaticPrefs::gfx_apitrace_enabled_AtStartup()) {
+    return nullptr;
+  }
+
+  static PRLibrary* sApitraceLibrary = nullptr;
+  if (sApitraceLibrary) return sApitraceLibrary;
+
+  nsAutoCString logFile;
+  Preferences::GetCString("gfx.apitrace.logfile", logFile);
+  if (logFile.IsEmpty()) {
+    logFile = "firefox.trace";
+  }
+
+  // The firefox process can't write to /data/local, but it can write
+  // to $GRE_HOME/
+  nsAutoCString logPath;
+  logPath.AppendPrintf("%s/%s", getenv("GRE_HOME"), logFile.get());
+
+#ifndef XP_WIN  // Windows is missing setenv and forbids PR_LoadLibrary.
+  // apitrace uses the TRACE_FILE environment variable to determine where
+  // to log trace output to
+  printf_stderr("Logging GL tracing output to %s", logPath.get());
+  setenv("TRACE_FILE", logPath.get(), false);
+
+  printf_stderr("Attempting load of %s\n", path);
+  sApitraceLibrary = PR_LoadLibrary(path);
+#endif
+
+  return sApitraceLibrary;
+}
+
+#ifdef XP_WIN
+// see the comment in GLLibraryEGL::EnsureInitialized() for the rationale here.
+static PRLibrary* LoadLibraryForEGLOnWindows(const nsAString& filename) {
+  nsAutoString path(gfx::gfxVars::GREDirectory());
+  path.Append(PR_GetDirectorySeparator());
+  path.Append(filename);
+
+  PRLibSpec lspec;
+  lspec.type = PR_LibSpec_PathnameU;
+  lspec.value.pathname_u = path.get();
+  return PR_LoadLibraryWithFlags(lspec, PR_LD_LAZY | PR_LD_LOCAL);
+}
+
+#endif  // XP_WIN
+
+static std::shared_ptr<EglDisplay> GetAndInitDisplay(
+    GLLibraryEGL& egl, void* displayType,
+    const StaticMutexAutoLock& aProofOfLock) {
+  const auto display = egl.fGetDisplay(displayType);
+  if (!display) return nullptr;
+  return EglDisplay::Create(egl, display, false, aProofOfLock);
+}
+
+#ifdef MOZ_WAYLAND
+static std::shared_ptr<EglDisplay> GetAndInitDeviceDisplay(
+    GLLibraryEGL& egl, const StaticMutexAutoLock& aProofOfLock) {
+  nsAutoCString drmRenderDevice(gfx::gfxVars::DrmRenderDevice());
+  if (drmRenderDevice.IsEmpty() ||
+      !egl.IsExtensionSupported(EGLLibExtension::EXT_platform_device) ||
+      !egl.IsExtensionSupported(EGLLibExtension::EXT_device_enumeration)) {
+    return nullptr;
+  }
+
+  EGLint maxDevices;
+  if (!egl.fQueryDevicesEXT(0, nullptr, &maxDevices)) {
+    return nullptr;
+  }
+
+  std::vector<EGLDeviceEXT> devices(maxDevices);
+  EGLint numDevices;
+  if (!egl.fQueryDevicesEXT(devices.size(), devices.data(), &numDevices)) {
+    return nullptr;
+  }
+  devices.resize(numDevices);
+
+  EGLDisplay display = EGL_NO_DISPLAY;
+  for (const auto& device : devices) {
+    const char* renderNodeString =
+        egl.fQueryDeviceStringEXT(device, LOCAL_EGL_DRM_RENDER_NODE_FILE_EXT);
+    if (renderNodeString &&
+        strcmp(renderNodeString, drmRenderDevice.get()) == 0) {
+      const EGLAttrib attrib_list[] = {LOCAL_EGL_NONE};
+      display = egl.fGetPlatformDisplay(LOCAL_EGL_PLATFORM_DEVICE_EXT, device,
+                                        attrib_list);
+      break;
+    }
+  }
+  if (!display) {
+    return nullptr;
+  }
+
+  return EglDisplay::Create(egl, display, true, aProofOfLock);
+}
+
+static std::shared_ptr<EglDisplay> GetAndInitSurfacelessDisplay(
+    GLLibraryEGL& egl, const StaticMutexAutoLock& aProofOfLock) {
+  if (!egl.IsExtensionSupported(EGLLibExtension::MESA_platform_surfaceless)) {
+    return nullptr;
+  }
+
+  const EGLAttrib attrib_list[] = {LOCAL_EGL_NONE};
+  const EGLDisplay display = egl.fGetPlatformDisplay(
+      LOCAL_EGL_PLATFORM_SURFACELESS_MESA, EGL_DEFAULT_DISPLAY, attrib_list);
+  if (display == EGL_NO_DISPLAY) {
+    return nullptr;
+  }
+  return EglDisplay::Create(egl, display, true, aProofOfLock);
+}
+#endif
+
+static auto EglDebugLayersEnabled() {
+  EGLAttrib ret = LOCAL_EGL_FALSE;
+  if (StaticPrefs::gfx_direct3d11_enable_debug_layer_AtStartup()) {
+    ret = LOCAL_EGL_TRUE;
+  }
+  return ret;
+}
+
+static std::shared_ptr<EglDisplay> GetAndInitWARPDisplay(
+    GLLibraryEGL& egl, void* displayType,
+    const StaticMutexAutoLock& aProofOfLock) {
+  const EGLAttrib attrib_list[] = {
+      LOCAL_EGL_PLATFORM_ANGLE_DEVICE_TYPE_ANGLE,
+      LOCAL_EGL_PLATFORM_ANGLE_DEVICE_TYPE_WARP_ANGLE,
+      LOCAL_EGL_PLATFORM_ANGLE_DEBUG_LAYERS_ENABLED_ANGLE,
+      EglDebugLayersEnabled(),
+      // Requires:
+      LOCAL_EGL_PLATFORM_ANGLE_TYPE_ANGLE,
+      LOCAL_EGL_PLATFORM_ANGLE_TYPE_D3D11_ANGLE, LOCAL_EGL_NONE};
+  const EGLDisplay display = egl.fGetPlatformDisplay(
+      LOCAL_EGL_PLATFORM_ANGLE_ANGLE, displayType, attrib_list);
+
+  if (display == EGL_NO_DISPLAY) {
+    const EGLint err = egl.fGetError();
+    if (err != LOCAL_EGL_SUCCESS) {
+      gfxCriticalError() << "Unexpected GL error: " << gfx::hexa(err);
+      MOZ_CRASH("GFX: Unexpected GL error.");
+    }
+    return nullptr;
+  }
+
+  return EglDisplay::Create(egl, display, true, aProofOfLock);
+}
+
+std::shared_ptr<EglDisplay> GLLibraryEGL::CreateDisplay(
+    ID3D11Device* const d3d11Device) {
+  StaticMutexAutoLock lock(sMutex);
+  EGLDeviceEXT eglDevice =
+      fCreateDeviceANGLE(LOCAL_EGL_D3D11_DEVICE_ANGLE, d3d11Device, nullptr);
+  if (!eglDevice) {
+    gfxCriticalNote << "Failed to get EGLDeviceEXT of D3D11Device";
+    return nullptr;
+  }
+  const char* features[] = {"allowES3OnFL10_0", nullptr};
+  // Create an EGLDisplay using the EGLDevice
+  const EGLAttrib attrib_list[] = {LOCAL_EGL_FEATURE_OVERRIDES_ENABLED_ANGLE,
+                                   reinterpret_cast<EGLAttrib>(features),
+                                   LOCAL_EGL_NONE};
+  const auto display = fGetPlatformDisplay(LOCAL_EGL_PLATFORM_DEVICE_EXT,
+                                           eglDevice, attrib_list);
+  if (!display) {
+    gfxCriticalNote << "Failed to get EGLDisplay of D3D11Device";
+    return nullptr;
+  }
+
+  if (!display) {
+    const EGLint err = fGetError();
+    if (err != LOCAL_EGL_SUCCESS) {
+      gfxCriticalError() << "Unexpected GL error: " << gfx::hexa(err);
+      MOZ_CRASH("GFX: Unexpected GL error.");
+    }
+    return nullptr;
+  }
+
+  const auto ret = EglDisplay::Create(*this, display, false, lock);
+
+  if (!ret) {
+    const EGLint err = fGetError();
+    if (err != LOCAL_EGL_SUCCESS) {
+      gfxCriticalError()
+          << "Failed to initialize EGLDisplay for WebRender error: "
+          << gfx::hexa(err);
+    }
+    return nullptr;
+  }
+  return ret;
+}
+
+static bool IsAccelAngleSupported(nsACString* const out_failureId) {
+  if (!gfx::gfxVars::AllowWebglAccelAngle()) {
+    if (out_failureId->IsEmpty()) {
+      *out_failureId = "FEATURE_FAILURE_ACCL_ANGLE_NOT_OK"_ns;
+    }
+    return false;
+  }
+  return true;
+}
+
+class AngleErrorReporting {
+ public:
+  AngleErrorReporting() : mFailureId(nullptr) {
+    // No static constructor
+  }
+
+  void SetFailureId(nsACString* const aFailureId) { mFailureId = aFailureId; }
+
+  void logError(const char* errorMessage) {
+    if (!mFailureId) {
+      return;
+    }
+
+    nsCString str(errorMessage);
+    Tokenizer tokenizer(str);
+
+    // Parse "ANGLE Display::initialize error " << error.getID() << ": "
+    //       << error.getMessage()
+    nsCString currWord;
+    Tokenizer::Token intToken;
+    if (tokenizer.CheckWord("ANGLE") && tokenizer.CheckWhite() &&
+        tokenizer.CheckWord("Display") && tokenizer.CheckChar(':') &&
+        tokenizer.CheckChar(':') && tokenizer.CheckWord("initialize") &&
+        tokenizer.CheckWhite() && tokenizer.CheckWord("error") &&
+        tokenizer.CheckWhite() &&
+        tokenizer.Check(Tokenizer::TOKEN_INTEGER, intToken)) {
+      *mFailureId = "FAILURE_ID_ANGLE_ID_";
+      mFailureId->AppendPrintf("%" PRIu64, intToken.AsInteger());
+    } else {
+      *mFailureId = "FAILURE_ID_ANGLE_UNKNOWN";
+    }
+  }
+
+ private:
+  nsACString* mFailureId;
+};
+
+AngleErrorReporting gAngleErrorReporter;
+
+static std::shared_ptr<EglDisplay> GetAndInitDisplayForAccelANGLE(
+    GLLibraryEGL& egl, nsACString* const out_failureId,
+    const StaticMutexAutoLock& aProofOfLock) {
+  gfx::FeatureState& d3d11ANGLE =
+      gfx::gfxConfig::GetFeature(gfx::Feature::D3D11_HW_ANGLE);
+
+  if (!StaticPrefs::webgl_angle_try_d3d11()) {
+    d3d11ANGLE.UserDisable("User disabled D3D11 ANGLE by pref",
+                           "FAILURE_ID_ANGLE_PREF"_ns);
+  }
+  if (StaticPrefs::webgl_angle_force_d3d11()) {
+    d3d11ANGLE.UserForceEnable(
+        "User force-enabled D3D11 ANGLE on disabled hardware");
+  }
+  gAngleErrorReporter.SetFailureId(out_failureId);
+
+  auto guardShutdown = mozilla::MakeScopeExit([&] {
+    gAngleErrorReporter.SetFailureId(nullptr);
+    // NOTE: Ideally we should be calling ANGLEPlatformShutdown after the
+    //       ANGLE display is destroyed. However gAngleErrorReporter
+    //       will live longer than the ANGLE display so we're fine.
+  });
+
+  if (gfx::gfxConfig::IsForcedOnByUser(gfx::Feature::D3D11_HW_ANGLE)) {
+    return GetAndInitDisplay(egl, LOCAL_EGL_D3D11_ONLY_DISPLAY_ANGLE,
+                             aProofOfLock);
+  }
+
+  std::shared_ptr<EglDisplay> ret;
+  if (d3d11ANGLE.IsEnabled()) {
+    ret = GetAndInitDisplay(egl, LOCAL_EGL_D3D11_ELSE_D3D9_DISPLAY_ANGLE,
+                            aProofOfLock);
+  }
+
+  if (!ret) {
+    ret = GetAndInitDisplay(egl, EGL_DEFAULT_DISPLAY, aProofOfLock);
+  }
+
+  if (!ret && out_failureId->IsEmpty()) {
+    *out_failureId = "FEATURE_FAILURE_ACCL_ANGLE_NO_DISP"_ns;
+  }
+
+  return ret;
+}
+
+// -
+
+#if defined(XP_UNIX)
+#  define GLES2_LIB "libGLESv2.so"
+#  define GLES2_LIB2 "libGLESv2.so.2"
+#  define GL_LIB "libGL.so"
+#  define GL_LIB2 "libGL.so.1"
+#elif defined(XP_WIN)
+#  define GLES2_LIB "libGLESv2.dll"
+#else
+#  error "Platform not recognized"
+#endif
+
+Maybe<SymbolLoader> GLLibraryEGL::GetSymbolLoader() const {
+  auto ret = SymbolLoader(mSymbols.fGetProcAddress);
+  ret.mLib = mGLLibrary;
+  return Some(ret);
+}
+
+// -
+
+/* static */
+RefPtr<GLLibraryEGL> GLLibraryEGL::Get(nsACString* const out_failureId) {
+  StaticMutexAutoLock lock(sMutex);
+  if (!sInstance) {
+    sInstance = new GLLibraryEGL;
+    if (NS_WARN_IF(!sInstance->Init(out_failureId))) {
+      sInstance = nullptr;
+    }
+  }
+  return sInstance;
+}
+
+/* static */ void GLLibraryEGL::Shutdown() {
+  StaticMutexAutoLock lock(sMutex);
+  sInstance = nullptr;
+}
+
+bool GLLibraryEGL::Init(nsACString* const out_failureId) {
+  MOZ_RELEASE_ASSERT(!mSymbols.fTerminate);
+
+  mozilla::ScopedGfxFeatureReporter reporter("EGL");
+
+#ifdef XP_WIN
+  if (!mEGLLibrary) {
+    // On Windows, the GLESv2, EGL and DXSDK libraries are shipped with libxul
+    // and we should look for them there. We have to load the libs in this
+    // order, because libEGL.dll depends on libGLESv2.dll which depends on the
+    // DXSDK libraries. This matters especially for WebRT apps which are in a
+    // different directory. See bug 760323 and bug 749459
+
+    // Also note that we intentionally leak the libs we load.
+
+    do {
+      // Windows 8.1+ has d3dcompiler_47.dll in the system directory.
+      // Try it first. Note that _46 will never be in the system
+      // directory. So there is no point trying _46 in the system
+      // directory.
+
+      if (LoadLibrarySystem32(L"d3dcompiler_47.dll")) break;
+
+#  ifdef MOZ_D3DCOMPILER_VISTA_DLL
+      if (LoadLibraryForEGLOnWindows(NS_LITERAL_STRING_FROM_CSTRING(
+              MOZ_STRINGIFY(MOZ_D3DCOMPILER_VISTA_DLL))))
+        break;
+#  endif
+
+      MOZ_ASSERT(false, "d3dcompiler DLL loading failed.");
+    } while (false);
+
+    mGLLibrary = LoadLibraryForEGLOnWindows(u"libGLESv2.dll"_ns);
+
+    mEGLLibrary = LoadLibraryForEGLOnWindows(u"libEGL.dll"_ns);
+  }
+
+#else  // !Windows
+
+  // On non-Windows (Android) we use system copies of libEGL. We look for
+  // the APITrace lib, libEGL.so, and libEGL.so.1 in that order.
+
+#  if defined(ANDROID)
+  if (!mEGLLibrary) mEGLLibrary = LoadApitraceLibrary();
+#  endif
+
+  if (!mEGLLibrary) {
+    mEGLLibrary = PR_LoadLibrary("libEGL.so");
+  }
+#  if defined(XP_UNIX)
+  if (!mEGLLibrary) {
+    mEGLLibrary = PR_LoadLibrary("libEGL.so.1");
+  }
+#  endif
+
+#  ifdef APITRACE_LIB
+  if (!mGLLibrary) {
+    mGLLibrary = PR_LoadLibrary(APITRACE_LIB);
+  }
+#  endif
+
+#  ifdef GL_LIB
+  if (!mGLLibrary) {
+    mGLLibrary = PR_LoadLibrary(GL_LIB);
+  }
+#  endif
+
+#  ifdef GL_LIB2
+  if (!mGLLibrary) {
+    mGLLibrary = PR_LoadLibrary(GL_LIB2);
+  }
+#  endif
+
+  if (!mGLLibrary) {
+    mGLLibrary = PR_LoadLibrary(GLES2_LIB);
+  }
+
+#  ifdef GLES2_LIB2
+  if (!mGLLibrary) {
+    mGLLibrary = PR_LoadLibrary(GLES2_LIB2);
+  }
+#  endif
+
+#endif  // !Windows
+
+  if (!mEGLLibrary || !mGLLibrary) {
+    NS_WARNING("Couldn't load EGL LIB.");
+    *out_failureId = "FEATURE_FAILURE_EGL_LOAD_3"_ns;
+    return false;
+  }
+
+#define SYMBOL(X)                 \
+  {                               \
+    (PRFuncPtr*)&mSymbols.f##X, { \
+      { "egl" #X }                \
+    }                             \
+  }
+#define END_OF_SYMBOLS \
+  {                    \
+    nullptr, {}        \
+  }
+
+  SymLoadStruct earlySymbols[] = {SYMBOL(GetDisplay),
+                                  SYMBOL(Terminate),
+                                  SYMBOL(GetCurrentSurface),
+                                  SYMBOL(GetCurrentContext),
+                                  SYMBOL(MakeCurrent),
+                                  SYMBOL(DestroyContext),
+                                  SYMBOL(CreateContext),
+                                  SYMBOL(DestroySurface),
+                                  SYMBOL(CreateWindowSurface),
+                                  SYMBOL(CreatePbufferSurface),
+                                  SYMBOL(CreatePbufferFromClientBuffer),
+                                  SYMBOL(CreatePixmapSurface),
+                                  SYMBOL(BindAPI),
+                                  SYMBOL(Initialize),
+                                  SYMBOL(ChooseConfig),
+                                  SYMBOL(GetError),
+                                  SYMBOL(GetConfigs),
+                                  SYMBOL(GetConfigAttrib),
+                                  SYMBOL(WaitNative),
+                                  SYMBOL(GetProcAddress),
+                                  SYMBOL(SwapBuffers),
+                                  SYMBOL(CopyBuffers),
+                                  SYMBOL(QueryString),
+                                  SYMBOL(QueryContext),
+                                  SYMBOL(BindTexImage),
+                                  SYMBOL(ReleaseTexImage),
+                                  SYMBOL(SwapInterval),
+                                  SYMBOL(QuerySurface),
+                                  END_OF_SYMBOLS};
+
+  {
+    const SymbolLoader libLoader(*mEGLLibrary);
+    if (!libLoader.LoadSymbols(earlySymbols)) {
+      NS_WARNING(
+          "Couldn't find required entry points in EGL library (early init)");
+      *out_failureId = "FEATURE_FAILURE_EGL_SYM"_ns;
+      return false;
+    }
+  }
+
+  {
+    const char internalFuncName[] =
+        "_Z35eglQueryStringImplementationANDROIDPvi";
+    const auto& internalFunc =
+        PR_FindFunctionSymbol(mEGLLibrary, internalFuncName);
+    if (internalFunc) {
+      *(PRFuncPtr*)&mSymbols.fQueryString = internalFunc;
+    }
+  }
+
+  // -
+
+  InitLibExtensions();
+
+  const SymbolLoader pfnLoader(mSymbols.fGetProcAddress);
+
+  const auto fnLoadSymbols = [&](const SymLoadStruct* symbols) {
+    const bool shouldWarn = gfxEnv::MOZ_GL_SPEW();
+    if (pfnLoader.LoadSymbols(symbols, shouldWarn)) return true;
+
+    ClearSymbols(symbols);
+    return false;
+  };
+
+  // Check the ANGLE support the system has
+  mIsANGLE = IsExtensionSupported(EGLLibExtension::ANGLE_platform_angle);
+
+  // Client exts are ready. (But not display exts!)
+
+  if (mIsANGLE) {
+    MOZ_ASSERT(IsExtensionSupported(EGLLibExtension::ANGLE_platform_angle_d3d));
+    const SymLoadStruct angleSymbols[] = {SYMBOL(GetPlatformDisplay),
+                                          END_OF_SYMBOLS};
+    if (!fnLoadSymbols(angleSymbols)) {
+      gfxCriticalError() << "Failed to load ANGLE symbols!";
+      return false;
+    }
+    MOZ_ASSERT(IsExtensionSupported(EGLLibExtension::ANGLE_platform_angle_d3d));
+    const SymLoadStruct createDeviceSymbols[] = {
+        SYMBOL(CreateDeviceANGLE), SYMBOL(ReleaseDeviceANGLE), END_OF_SYMBOLS};
+    if (!fnLoadSymbols(createDeviceSymbols)) {
+      NS_ERROR(
+          "EGL supports ANGLE_device_creation without exposing its functions!");
+      MarkExtensionUnsupported(EGLLibExtension::ANGLE_device_creation);
+    }
+  }
+
+  // ANDROID_get_native_client_buffer isn't necessarily enumerated in lib exts,
+  // but it is one.
+  {
+    const SymLoadStruct symbols[] = {SYMBOL(GetNativeClientBufferANDROID),
+                                     END_OF_SYMBOLS};
+    if (fnLoadSymbols(symbols)) {
+      mAvailableExtensions[UnderlyingValue(
+          EGLLibExtension::ANDROID_get_native_client_buffer)] = true;
+    }
+  }
+
+  // -
+  // Load possible display ext symbols.
+
+  {
+    const SymLoadStruct symbols[] = {SYMBOL(QuerySurfacePointerANGLE),
+                                     END_OF_SYMBOLS};
+    (void)fnLoadSymbols(symbols);
+  }
+  {
+    const SymLoadStruct symbols[] = {
+        SYMBOL(CreateSyncKHR), SYMBOL(DestroySyncKHR),
+        SYMBOL(ClientWaitSyncKHR), SYMBOL(GetSyncAttribKHR), END_OF_SYMBOLS};
+    (void)fnLoadSymbols(symbols);
+  }
+  {
+    const SymLoadStruct symbols[] = {SYMBOL(CreateImageKHR),
+                                     SYMBOL(DestroyImageKHR), END_OF_SYMBOLS};
+    (void)fnLoadSymbols(symbols);
+  }
+  {
+    const SymLoadStruct symbols[] = {SYMBOL(WaitSyncKHR), END_OF_SYMBOLS};
+    (void)fnLoadSymbols(symbols);
+  }
+  {
+    const SymLoadStruct symbols[] = {SYMBOL(DupNativeFenceFDANDROID),
+                                     END_OF_SYMBOLS};
+    (void)fnLoadSymbols(symbols);
+  }
+  {
+    const SymLoadStruct symbols[] = {SYMBOL(CreateStreamKHR),
+                                     SYMBOL(DestroyStreamKHR),
+                                     SYMBOL(QueryStreamKHR), END_OF_SYMBOLS};
+    (void)fnLoadSymbols(symbols);
+  }
+  {
+    const SymLoadStruct symbols[] = {SYMBOL(StreamConsumerGLTextureExternalKHR),
+                                     SYMBOL(StreamConsumerAcquireKHR),
+                                     SYMBOL(StreamConsumerReleaseKHR),
+                                     END_OF_SYMBOLS};
+    (void)fnLoadSymbols(symbols);
+  }
+  {
+    const SymLoadStruct symbols[] = {
+        SYMBOL(QueryDisplayAttribEXT), SYMBOL(QueryDeviceAttribEXT),
+        SYMBOL(QueryDeviceStringEXT), END_OF_SYMBOLS};
+    (void)fnLoadSymbols(symbols);
+  }
+  {
+    const SymLoadStruct symbols[] = {
+        SYMBOL(StreamConsumerGLTextureExternalAttribsNV), END_OF_SYMBOLS};
+    (void)fnLoadSymbols(symbols);
+  }
+  {
+    const SymLoadStruct symbols[] = {
+        SYMBOL(CreateStreamProducerD3DTextureANGLE),
+        SYMBOL(StreamPostD3DTextureANGLE), END_OF_SYMBOLS};
+    (void)fnLoadSymbols(symbols);
+  }
+  {
+    const SymLoadStruct symbols[] = {
+        {(PRFuncPtr*)&mSymbols.fSwapBuffersWithDamage,
+         {{"eglSwapBuffersWithDamageEXT"}}},
+        END_OF_SYMBOLS};
+    (void)fnLoadSymbols(symbols);
+  }
+  {
+    const SymLoadStruct symbols[] = {
+        {(PRFuncPtr*)&mSymbols.fSwapBuffersWithDamage,
+         {{"eglSwapBuffersWithDamageKHR"}}},
+        END_OF_SYMBOLS};
+    (void)fnLoadSymbols(symbols);
+  }
+  {
+    const SymLoadStruct symbols[] = {
+        {(PRFuncPtr*)&mSymbols.fSetDamageRegion, {{"eglSetDamageRegionKHR"}}},
+        END_OF_SYMBOLS};
+    (void)fnLoadSymbols(symbols);
+  }
+  {
+    const SymLoadStruct symbols[] = {SYMBOL(GetPlatformDisplay),
+                                     END_OF_SYMBOLS};
+    (void)fnLoadSymbols(symbols);
+  }
+  {
+    const SymLoadStruct symbols[] = {SYMBOL(ExportDMABUFImageQueryMESA),
+                                     SYMBOL(ExportDMABUFImageMESA),
+                                     END_OF_SYMBOLS};
+    (void)fnLoadSymbols(symbols);
+  }
+  {
+    const SymLoadStruct symbols[] = {SYMBOL(QueryDevicesEXT), END_OF_SYMBOLS};
+    (void)fnLoadSymbols(symbols);
+  }
+
+  return true;
+}
+
+// -
+
+template <size_t N>
+static void MarkExtensions(const char* rawExtString, bool shouldDumpExts,
+                           const char* extType, const char* const (&names)[N],
+                           std::bitset<N>* const out) {
+  MOZ_ASSERT(rawExtString);
+
+  const nsDependentCString extString(rawExtString);
+
+  std::vector<nsCString> extList;
+  SplitByChar(extString, ' ', &extList);
+
+  if (shouldDumpExts) {
+    printf_stderr("%u EGL %s extensions: (*: recognized)\n",
+                  (uint32_t)extList.size(), extType);
+  }
+
+  MarkBitfieldByStrings(extList, shouldDumpExts, names, out);
+}
+
+// -
+
+// static
+std::shared_ptr<EglDisplay> EglDisplay::Create(
+    GLLibraryEGL& lib, const EGLDisplay display, const bool isWarp,
+    const StaticMutexAutoLock& aProofOfLock) {
+  // Retrieve the EglDisplay if it already exists
+  {
+    const auto itr = lib.mActiveDisplays.find(display);
+    if (itr != lib.mActiveDisplays.end()) {
+      const auto ret = itr->second.lock();
+      if (ret) {
+        return ret;
+      }
+    }
+  }
+
+  if (!lib.fInitialize(display, nullptr, nullptr)) {
+    return nullptr;
+  }
+
+  static std::once_flag sMesaLeakFlag;
+  std::call_once(sMesaLeakFlag, MesaMemoryLeakWorkaround);
+
+  const auto ret =
+      std::make_shared<EglDisplay>(PrivateUseOnly{}, lib, display, isWarp);
+  lib.mActiveDisplays.insert({display, ret});
+  return ret;
+}
+
+EglDisplay::EglDisplay(const PrivateUseOnly&, GLLibraryEGL& lib,
+                       const EGLDisplay disp, const bool isWarp)
+    : mLib(&lib), mDisplay(disp), mIsWARP(isWarp) {
+  const bool shouldDumpExts = GLContext::ShouldDumpExts();
+
+  auto rawExtString =
+      (const char*)mLib->fQueryString(mDisplay, LOCAL_EGL_EXTENSIONS);
+  if (!rawExtString) {
+    NS_WARNING("Failed to query EGL display extensions!.");
+    rawExtString = "";
+  }
+  MarkExtensions(rawExtString, shouldDumpExts, "display", sEGLExtensionNames,
+                 &mAvailableExtensions);
+
+  // -
+
+  if (!HasKHRImageBase()) {
+    MarkExtensionUnsupported(EGLExtension::KHR_image_pixmap);
+  }
+
+  if (IsExtensionSupported(EGLExtension::KHR_surfaceless_context)) {
+    const auto vendor =
+        (const char*)mLib->fQueryString(mDisplay, LOCAL_EGL_VENDOR);
+
+    // Bug 1464610: Mali T720 (Amazon Fire 8 HD) claims to support this
+    // extension, but if you actually eglMakeCurrent() with EGL_NO_SURFACE, it
+    // fails to render anything when a real surface is provided later on. We
+    // only have the EGL vendor available here, so just avoid using this
+    // extension on all Mali devices.
+    if (vendor && (strcmp(vendor, "ARM") == 0)) {
+      MarkExtensionUnsupported(EGLExtension::KHR_surfaceless_context);
+    }
+  }
+
+  // ANDROID_native_fence_sync isn't necessarily enumerated in display ext,
+  // but it is one.
+  if (mLib->mSymbols.fDupNativeFenceFDANDROID) {
+    mAvailableExtensions[UnderlyingValue(
+        EGLExtension::ANDROID_native_fence_sync)] = true;
+  }
+}
+
+EglDisplay::~EglDisplay() {
+  StaticMutexAutoLock lock(GLLibraryEGL::sMutex);
+  fTerminate();
+  mLib->mActiveDisplays.erase(mDisplay);
+}
+
+// -
+
+std::shared_ptr<EglDisplay> GLLibraryEGL::DefaultDisplay(
+    nsACString* const out_failureId) {
+  StaticMutexAutoLock lock(sMutex);
+  auto ret = mDefaultDisplay.lock();
+  if (ret) return ret;
+
+  ret = CreateDisplayLocked(false, out_failureId, lock);
+  mDefaultDisplay = ret;
+  return ret;
+}
+
+std::shared_ptr<EglDisplay> GLLibraryEGL::CreateDisplay(
+    const bool forceAccel, nsACString* const out_failureId) {
+  StaticMutexAutoLock lock(sMutex);
+  return CreateDisplayLocked(forceAccel, out_failureId, lock);
+}
+
+std::shared_ptr<EglDisplay> GLLibraryEGL::CreateDisplayLocked(
+    const bool forceAccel, nsACString* const out_failureId,
+    const StaticMutexAutoLock& aProofOfLock) {
+  std::shared_ptr<EglDisplay> ret;
+
+  if (IsExtensionSupported(EGLLibExtension::ANGLE_platform_angle_d3d)) {
+    nsCString accelAngleFailureId;
+    bool accelAngleSupport = IsAccelAngleSupported(&accelAngleFailureId);
+    bool shouldTryAccel = forceAccel || accelAngleSupport;
+    bool shouldTryWARP = !forceAccel;  // Only if ANGLE not supported or fails
+
+    // If WARP preferred, will override ANGLE support
+    if (StaticPrefs::webgl_angle_force_warp()) {
+      shouldTryWARP = true;
+      shouldTryAccel = false;
+      if (accelAngleFailureId.IsEmpty()) {
+        accelAngleFailureId = "FEATURE_FAILURE_FORCE_WARP"_ns;
+      }
+    }
+
+    // Hardware accelerated ANGLE path (supported or force accel)
+    if (shouldTryAccel) {
+      ret = GetAndInitDisplayForAccelANGLE(*this, out_failureId, aProofOfLock);
+    }
+
+    // Report the acceleration status to telemetry
+    if (!ret) {
+      if (accelAngleFailureId.IsEmpty()) {
+        Telemetry::Accumulate(Telemetry::CANVAS_WEBGL_ACCL_FAILURE_ID,
+                              "FEATURE_FAILURE_ACCL_ANGLE_UNKNOWN"_ns);
+      } else {
+        Telemetry::Accumulate(Telemetry::CANVAS_WEBGL_ACCL_FAILURE_ID,
+                              accelAngleFailureId);
+      }
+    } else {
+      Telemetry::Accumulate(Telemetry::CANVAS_WEBGL_ACCL_FAILURE_ID,
+                            "SUCCESS"_ns);
+    }
+
+    // Fallback to a WARP display if ANGLE fails, or if WARP is forced
+    if (!ret && shouldTryWARP) {
+      ret = GetAndInitWARPDisplay(*this, EGL_DEFAULT_DISPLAY, aProofOfLock);
+      if (!ret) {
+        if (out_failureId->IsEmpty()) {
+          *out_failureId = "FEATURE_FAILURE_WARP_FALLBACK"_ns;
+        }
+        NS_ERROR("Fallback WARP context failed to initialize.");
+        return nullptr;
+      }
+    }
+  } else {
+    void* nativeDisplay = EGL_DEFAULT_DISPLAY;
+#ifdef MOZ_WAYLAND
+    GdkDisplay* gdkDisplay = gdk_display_get_default();
+    if (!gdkDisplay) {
+      ret = GetAndInitDeviceDisplay(*this, aProofOfLock);
+      if (!ret) {
+        ret = GetAndInitSurfacelessDisplay(*this, aProofOfLock);
+      }
+    } else if (widget::GdkIsWaylandDisplay(gdkDisplay)) {
+      // Wayland does not support EGL_DEFAULT_DISPLAY
+      nativeDisplay = widget::WaylandDisplayGetWLDisplay(gdkDisplay);
+      if (!nativeDisplay) {
+        NS_WARNING("Failed to get wl_display.");
+        return nullptr;
+      }
+    }
+#endif
+    if (!ret) {
+      ret = GetAndInitDisplay(*this, nativeDisplay, aProofOfLock);
+    }
+  }
+
+  if (!ret) {
+    if (out_failureId->IsEmpty()) {
+      *out_failureId = "FEATURE_FAILURE_NO_DISPLAY"_ns;
+    }
+    NS_WARNING("Failed to initialize a display.");
+    return nullptr;
+  }
+
+  return ret;
+}
+
+void GLLibraryEGL::InitLibExtensions() {
+  const bool shouldDumpExts = GLContext::ShouldDumpExts();
+
+  const char* rawExtString = nullptr;
+
+#ifndef ANDROID
+  // Bug 1209612: Crashes on a number of android drivers.
+  // Ideally we would only blocklist this there, but for now we don't need the
+  // client extension list on ANDROID (we mostly need it on ANGLE), and we'd
+  // rather not crash.
+  rawExtString = (const char*)fQueryString(nullptr, LOCAL_EGL_EXTENSIONS);
+#endif
+
+  if (!rawExtString) {
+    if (shouldDumpExts) {
+      printf_stderr("No EGL lib extensions.\n");
+    }
+    return;
+  }
+
+  MarkExtensions(rawExtString, shouldDumpExts, "lib", sEGLLibraryExtensionNames,
+                 &mAvailableExtensions);
+}
+
+void EglDisplay::DumpEGLConfig(EGLConfig cfg) const {
+#define ATTR(_x)                                                     \
+  do {                                                               \
+    int attrval = 0;                                                 \
+    mLib->fGetConfigAttrib(mDisplay, cfg, LOCAL_EGL_##_x, &attrval); \
+    const auto err = mLib->fGetError();                              \
+    if (err != 0x3000) {                                             \
+      printf_stderr("  %s: ERROR (0x%04x)\n", #_x, err);             \
+    } else {                                                         \
+      printf_stderr("  %s: %d (0x%04x)\n", #_x, attrval, attrval);   \
+    }                                                                \
+  } while (0)
+
+  printf_stderr("EGL Config: %d [%p]\n", (int)(intptr_t)cfg, cfg);
+
+  ATTR(BUFFER_SIZE);
+  ATTR(ALPHA_SIZE);
+  ATTR(BLUE_SIZE);
+  ATTR(GREEN_SIZE);
+  ATTR(RED_SIZE);
+  ATTR(DEPTH_SIZE);
+  ATTR(STENCIL_SIZE);
+  ATTR(CONFIG_CAVEAT);
+  ATTR(CONFIG_ID);
+  ATTR(LEVEL);
+  ATTR(MAX_PBUFFER_HEIGHT);
+  ATTR(MAX_PBUFFER_PIXELS);
+  ATTR(MAX_PBUFFER_WIDTH);
+  ATTR(NATIVE_RENDERABLE);
+  ATTR(NATIVE_VISUAL_ID);
+  ATTR(NATIVE_VISUAL_TYPE);
+  ATTR(PRESERVED_RESOURCES);
+  ATTR(SAMPLES);
+  ATTR(SAMPLE_BUFFERS);
+  ATTR(SURFACE_TYPE);
+  ATTR(TRANSPARENT_TYPE);
+  ATTR(TRANSPARENT_RED_VALUE);
+  ATTR(TRANSPARENT_GREEN_VALUE);
+  ATTR(TRANSPARENT_BLUE_VALUE);
+  ATTR(BIND_TO_TEXTURE_RGB);
+  ATTR(BIND_TO_TEXTURE_RGBA);
+  ATTR(MIN_SWAP_INTERVAL);
+  ATTR(MAX_SWAP_INTERVAL);
+  ATTR(LUMINANCE_SIZE);
+  ATTR(ALPHA_MASK_SIZE);
+  ATTR(COLOR_BUFFER_TYPE);
+  ATTR(RENDERABLE_TYPE);
+  ATTR(CONFORMANT);
+
+#undef ATTR
+}
+
+void EglDisplay::DumpEGLConfigs() const {
+  int nc = 0;
+  mLib->fGetConfigs(mDisplay, nullptr, 0, &nc);
+  std::vector<EGLConfig> ec(nc);
+  mLib->fGetConfigs(mDisplay, ec.data(), ec.size(), &nc);
+
+  for (int i = 0; i < nc; ++i) {
+    printf_stderr("========= EGL Config %d ========\n", i);
+    DumpEGLConfig(ec[i]);
+  }
+}
+
+static bool ShouldTrace() {
+  static bool ret = gfxEnv::MOZ_GL_DEBUG_VERBOSE();
+  return ret;
+}
+
+void BeforeEGLCall(const char* glFunction) {
+  if (ShouldTrace()) {
+    printf_stderr("[egl] > %s\n", glFunction);
+  }
+}
+
+void AfterEGLCall(const char* glFunction) {
+  if (ShouldTrace()) {
+    printf_stderr("[egl] < %s\n", glFunction);
+  }
+}
+
+} /* namespace gl */
+} /* namespace mozilla */