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-rw-r--r--gfx/gl/GLContextProviderEGL.cpp1254
1 files changed, 1254 insertions, 0 deletions
diff --git a/gfx/gl/GLContextProviderEGL.cpp b/gfx/gl/GLContextProviderEGL.cpp
new file mode 100644
index 0000000000..a685d94eea
--- /dev/null
+++ b/gfx/gl/GLContextProviderEGL.cpp
@@ -0,0 +1,1254 @@
+/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+#if defined(MOZ_WIDGET_GTK)
+# define GET_NATIVE_WINDOW_FROM_REAL_WIDGET(aWidget) \
+ ((EGLNativeWindowType)aWidget->GetNativeData(NS_NATIVE_EGL_WINDOW))
+# define GET_NATIVE_WINDOW_FROM_COMPOSITOR_WIDGET(aWidget) \
+ (aWidget->AsGTK()->GetEGLNativeWindow())
+#elif defined(MOZ_WIDGET_ANDROID)
+# define GET_NATIVE_WINDOW_FROM_REAL_WIDGET(aWidget) \
+ ((EGLNativeWindowType)aWidget->GetNativeData(NS_JAVA_SURFACE))
+# define GET_NATIVE_WINDOW_FROM_COMPOSITOR_WIDGET(aWidget) \
+ (aWidget->AsAndroid()->GetEGLNativeWindow())
+#elif defined(XP_WIN)
+# define GET_NATIVE_WINDOW_FROM_REAL_WIDGET(aWidget) \
+ ((EGLNativeWindowType)aWidget->GetNativeData(NS_NATIVE_WINDOW))
+# define GET_NATIVE_WINDOW_FROM_COMPOSITOR_WIDGET(aWidget) \
+ ((EGLNativeWindowType)aWidget->AsWindows()->GetHwnd())
+#else
+# define GET_NATIVE_WINDOW_FROM_REAL_WIDGET(aWidget) \
+ ((EGLNativeWindowType)aWidget->GetNativeData(NS_NATIVE_WINDOW))
+# define GET_NATIVE_WINDOW_FROM_COMPOSITOR_WIDGET(aWidget) \
+ ((EGLNativeWindowType)aWidget->RealWidget()->GetNativeData( \
+ NS_NATIVE_WINDOW))
+#endif
+
+#if defined(XP_UNIX)
+# ifdef MOZ_WIDGET_ANDROID
+# include <android/native_window.h>
+# include <android/native_window_jni.h>
+# include "mozilla/widget/AndroidCompositorWidget.h"
+# endif
+
+# define GLES2_LIB "libGLESv2.so"
+# define GLES2_LIB2 "libGLESv2.so.2"
+
+#elif defined(XP_WIN)
+# include "mozilla/widget/WinCompositorWidget.h"
+# include "nsIFile.h"
+
+# define GLES2_LIB "libGLESv2.dll"
+
+# ifndef WIN32_LEAN_AND_MEAN
+# define WIN32_LEAN_AND_MEAN 1
+# endif
+
+# include <windows.h>
+#else
+# error "Platform not recognized"
+#endif
+
+#include "gfxCrashReporterUtils.h"
+#include "gfxFailure.h"
+#include "gfxPlatform.h"
+#include "gfxUtils.h"
+#include "GLBlitHelper.h"
+#include "GLContextEGL.h"
+#include "GLContextProvider.h"
+#include "GLLibraryEGL.h"
+#include "GLLibraryLoader.h"
+#include "mozilla/ArrayUtils.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/Services.h"
+#include "mozilla/StaticPrefs_gfx.h"
+#include "mozilla/gfx/gfxVars.h"
+#include "mozilla/gfx/BuildConstants.h"
+#include "mozilla/gfx/Logging.h"
+#include "mozilla/layers/CompositorOptions.h"
+#include "mozilla/widget/CompositorWidget.h"
+#include "nsDebug.h"
+#include "nsIWidget.h"
+#include "nsThreadUtils.h"
+#include "ScopedGLHelpers.h"
+
+#if defined(MOZ_WIDGET_GTK)
+# include "mozilla/widget/GtkCompositorWidget.h"
+# if defined(MOZ_WAYLAND)
+# include <gdk/gdkwayland.h>
+# include <wayland-egl.h>
+# include "mozilla/WidgetUtilsGtk.h"
+# include "mozilla/widget/nsWaylandDisplay.h"
+# endif
+#endif
+
+struct wl_egl_window;
+
+using namespace mozilla::gfx;
+
+namespace mozilla {
+namespace gl {
+
+using namespace mozilla::widget;
+
+#if defined(MOZ_WAYLAND)
+class SavedGLSurface {
+ public:
+ SavedGLSurface(struct wl_surface* aWaylandSurface,
+ struct wl_egl_window* aEGLWindow);
+ ~SavedGLSurface();
+
+ private:
+ struct wl_surface* mWaylandSurface = nullptr;
+ struct wl_egl_window* mEGLWindow = nullptr;
+};
+
+static nsTHashMap<nsPtrHashKey<void>, SavedGLSurface*> sSavedGLSurfaces;
+
+void DeleteSavedGLSurface(EGLSurface surface) {
+ auto entry = sSavedGLSurfaces.Lookup(surface);
+ if (entry) {
+ delete entry.Data();
+ entry.Remove();
+ }
+}
+#endif
+
+static bool CreateConfigScreen(EglDisplay&, EGLConfig* const aConfig,
+ const bool aEnableDepthBuffer,
+ const bool aUseGles);
+
+// append three zeros at the end of attribs list to work around
+// EGL implementation bugs that iterate until they find 0, instead of
+// EGL_NONE. See bug 948406.
+#define EGL_ATTRIBS_LIST_SAFE_TERMINATION_WORKING_AROUND_BUGS \
+ LOCAL_EGL_NONE, 0, 0, 0
+
+static EGLint kTerminationAttribs[] = {
+ EGL_ATTRIBS_LIST_SAFE_TERMINATION_WORKING_AROUND_BUGS};
+
+static int next_power_of_two(int v) {
+ v--;
+ v |= v >> 1;
+ v |= v >> 2;
+ v |= v >> 4;
+ v |= v >> 8;
+ v |= v >> 16;
+ v++;
+
+ return v;
+}
+
+static bool is_power_of_two(int v) {
+ NS_ASSERTION(v >= 0, "bad value");
+
+ if (v == 0) return true;
+
+ return (v & (v - 1)) == 0;
+}
+
+static void DestroySurface(EglDisplay& egl, const EGLSurface oldSurface) {
+ if (oldSurface != EGL_NO_SURFACE) {
+ // TODO: This breaks TLS MakeCurrent caching.
+ egl.fMakeCurrent(EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
+ egl.fDestroySurface(oldSurface);
+#if defined(MOZ_WAYLAND)
+ DeleteSavedGLSurface(oldSurface);
+#endif
+ }
+}
+
+static EGLSurface CreateFallbackSurface(EglDisplay& egl,
+ const EGLConfig& config) {
+ if (egl.IsExtensionSupported(EGLExtension::KHR_surfaceless_context)) {
+ // We don't need a PBuffer surface in this case
+ return EGL_NO_SURFACE;
+ }
+
+ std::vector<EGLint> pbattrs;
+ pbattrs.push_back(LOCAL_EGL_WIDTH);
+ pbattrs.push_back(1);
+ pbattrs.push_back(LOCAL_EGL_HEIGHT);
+ pbattrs.push_back(1);
+
+ for (const auto& cur : kTerminationAttribs) {
+ pbattrs.push_back(cur);
+ }
+
+ EGLSurface surface = egl.fCreatePbufferSurface(config, pbattrs.data());
+ if (!surface) {
+ MOZ_CRASH("Failed to create fallback EGLSurface");
+ }
+
+ return surface;
+}
+
+static EGLSurface CreateSurfaceFromNativeWindow(
+ EglDisplay& egl, const EGLNativeWindowType window, const EGLConfig config) {
+ MOZ_ASSERT(window);
+ EGLSurface newSurface = EGL_NO_SURFACE;
+
+#ifdef MOZ_WIDGET_ANDROID
+ JNIEnv* const env = jni::GetEnvForThread();
+ ANativeWindow* const nativeWindow =
+ ANativeWindow_fromSurface(env, reinterpret_cast<jobject>(window));
+ if (!nativeWindow) {
+ gfxCriticalNote << "Failed to obtain native window from Surface";
+ return EGL_NO_SURFACE;
+ }
+ const auto& display = egl.mLib->fGetDisplay(EGL_DEFAULT_DISPLAY);
+ newSurface = egl.mLib->fCreateWindowSurface(display, config, nativeWindow, 0);
+ ANativeWindow_release(nativeWindow);
+#else
+ newSurface = egl.fCreateWindowSurface(config, window, 0);
+#endif
+ if (!newSurface) {
+ const auto err = egl.mLib->fGetError();
+ gfxCriticalNote << "Failed to create EGLSurface!: " << gfx::hexa(err);
+ }
+ return newSurface;
+}
+
+/* GLContextEGLFactory class was added as a friend of GLContextEGL
+ * so that it could access GLContextEGL::CreateGLContext. This was
+ * done so that a new function would not need to be added to the shared
+ * GLContextProvider interface.
+ */
+class GLContextEGLFactory {
+ public:
+ static already_AddRefed<GLContext> Create(EGLNativeWindowType aWindow,
+ bool aHardwareWebRender);
+ static already_AddRefed<GLContext> CreateImpl(EGLNativeWindowType aWindow,
+ bool aHardwareWebRender,
+ bool aUseGles);
+
+ private:
+ GLContextEGLFactory() = default;
+ ~GLContextEGLFactory() = default;
+};
+
+already_AddRefed<GLContext> GLContextEGLFactory::CreateImpl(
+ EGLNativeWindowType aWindow, bool aHardwareWebRender, bool aUseGles) {
+ nsCString failureId;
+ const auto lib = GLLibraryEGL::Get(&failureId);
+ if (!lib) {
+ gfxCriticalNote << "Failed[3] to load EGL library: " << failureId.get();
+ return nullptr;
+ }
+ const auto egl = lib->CreateDisplay(true, &failureId);
+ if (!egl) {
+ gfxCriticalNote << "Failed[3] to create EGL library display: "
+ << failureId.get();
+ return nullptr;
+ }
+
+ bool doubleBuffered = true;
+
+ EGLConfig config;
+ if (aHardwareWebRender && egl->mLib->IsANGLE()) {
+ // Force enable alpha channel to make sure ANGLE use correct framebuffer
+ // formart
+ const int bpp = 32;
+ if (!CreateConfig(*egl, &config, bpp, false, aUseGles)) {
+ gfxCriticalNote << "Failed to create EGLConfig for WebRender ANGLE!";
+ return nullptr;
+ }
+ } else if (kIsWayland || kIsX11) {
+ const int bpp = 32;
+ if (!CreateConfig(*egl, &config, bpp, false, aUseGles)) {
+ gfxCriticalNote << "Failed to create EGLConfig for WebRender!";
+ return nullptr;
+ }
+ } else {
+ if (!CreateConfigScreen(*egl, &config,
+ /* aEnableDepthBuffer */ false, aUseGles)) {
+ gfxCriticalNote << "Failed to create EGLConfig!";
+ return nullptr;
+ }
+ }
+
+ EGLSurface surface = EGL_NO_SURFACE;
+ if (aWindow) {
+ surface = mozilla::gl::CreateSurfaceFromNativeWindow(*egl, aWindow, config);
+ if (!surface) {
+ return nullptr;
+ }
+ }
+
+ CreateContextFlags flags = CreateContextFlags::NONE;
+ if (aHardwareWebRender &&
+ StaticPrefs::gfx_webrender_prefer_robustness_AtStartup()) {
+ flags |= CreateContextFlags::PREFER_ROBUSTNESS;
+ }
+ if (aHardwareWebRender && aUseGles) {
+ flags |= CreateContextFlags::PREFER_ES3;
+ }
+ if (!aHardwareWebRender) {
+ flags |= CreateContextFlags::REQUIRE_COMPAT_PROFILE;
+ }
+
+ const auto desc = GLContextDesc{{flags}, false};
+ RefPtr<GLContextEGL> gl = GLContextEGL::CreateGLContext(
+ egl, desc, config, surface, aUseGles, config, &failureId);
+ if (!gl) {
+ const auto err = egl->mLib->fGetError();
+ gfxCriticalNote << "Failed to create EGLContext!: " << gfx::hexa(err);
+ mozilla::gl::DestroySurface(*egl, surface);
+ return nullptr;
+ }
+
+ gl->MakeCurrent();
+ gl->SetIsDoubleBuffered(doubleBuffered);
+
+#ifdef MOZ_WIDGET_GTK
+ if (surface) {
+ const int interval = gfxVars::SwapIntervalEGL() ? 1 : 0;
+ egl->fSwapInterval(interval);
+ }
+#endif
+ if (aHardwareWebRender && egl->mLib->IsANGLE()) {
+ MOZ_ASSERT(doubleBuffered);
+ const int interval = gfxVars::SwapIntervalEGL() ? 1 : 0;
+ egl->fSwapInterval(interval);
+ }
+ return gl.forget();
+}
+
+already_AddRefed<GLContext> GLContextEGLFactory::Create(
+ EGLNativeWindowType aWindow, bool aHardwareWebRender) {
+ bool preferGles;
+#if defined(MOZ_WIDGET_ANDROID)
+ preferGles = true;
+#else
+ preferGles = StaticPrefs::gfx_egl_prefer_gles_enabled_AtStartup();
+#endif // defined(MOZ_WIDGET_ANDROID)
+
+ RefPtr<GLContext> glContext =
+ CreateImpl(aWindow, aHardwareWebRender, preferGles);
+#if !defined(MOZ_WIDGET_ANDROID)
+ if (!glContext) {
+ glContext = CreateImpl(aWindow, aHardwareWebRender, !preferGles);
+ }
+#endif // !defined(MOZ_WIDGET_ANDROID)
+ return glContext.forget();
+}
+
+/* static */
+EGLSurface GLContextEGL::CreateEGLSurfaceForCompositorWidget(
+ widget::CompositorWidget* aCompositorWidget, const EGLConfig aConfig) {
+ nsCString discardFailureId;
+ const auto egl = DefaultEglDisplay(&discardFailureId);
+ if (!egl) {
+ gfxCriticalNote << "Failed to load EGL library 6!";
+ return EGL_NO_SURFACE;
+ }
+
+ MOZ_ASSERT(aCompositorWidget);
+#ifdef MOZ_WAYLAND
+ // RenderCompositorEGL does not like EGL_NO_SURFACE as it fallbacks
+ // to SW rendering or claims itself as paused.
+ // In case we're missing valid native window because aCompositorWidget hidden,
+ // just create a fallback EGLSurface.
+ // Actual EGLSurface will be created by widget code later when
+ // aCompositorWidget becomes visible.
+ if (widget::GdkIsWaylandDisplay() && aCompositorWidget->IsHidden()) {
+ mozilla::gfx::IntSize pbSize(16, 16);
+ return CreateWaylandBufferSurface(*egl, aConfig, pbSize);
+ }
+#endif
+ EGLNativeWindowType window =
+ GET_NATIVE_WINDOW_FROM_COMPOSITOR_WIDGET(aCompositorWidget);
+ if (!window) {
+ gfxCriticalNote << "window is null";
+ return EGL_NO_SURFACE;
+ }
+
+ return mozilla::gl::CreateSurfaceFromNativeWindow(*egl, window, aConfig);
+}
+
+GLContextEGL::GLContextEGL(const std::shared_ptr<EglDisplay> egl,
+ const GLContextDesc& desc, EGLConfig surfaceConfig,
+ EGLSurface surface, EGLContext context)
+ : GLContext(desc, nullptr, false),
+ mEgl(egl),
+ mSurfaceConfig(surfaceConfig),
+ mContext(context),
+ mSurface(surface),
+ mFallbackSurface(CreateFallbackSurface(*mEgl, mSurfaceConfig)) {
+#ifdef DEBUG
+ printf_stderr("Initializing context %p surface %p on display %p\n", mContext,
+ mSurface, mEgl->mDisplay);
+#endif
+}
+
+void GLContextEGL::OnMarkDestroyed() {
+ if (mSurfaceOverride != EGL_NO_SURFACE) {
+ SetEGLSurfaceOverride(EGL_NO_SURFACE);
+ }
+}
+
+GLContextEGL::~GLContextEGL() {
+ MarkDestroyed();
+
+ // Wrapped context should not destroy eglContext/Surface
+ if (!mOwnsContext) {
+ return;
+ }
+
+#ifdef DEBUG
+ printf_stderr("Destroying context %p surface %p on display %p\n", mContext,
+ mSurface, mEgl->mDisplay);
+#endif
+
+ mEgl->fDestroyContext(mContext);
+
+ mozilla::gl::DestroySurface(*mEgl, mSurface);
+ mozilla::gl::DestroySurface(*mEgl, mFallbackSurface);
+}
+
+bool GLContextEGL::Init() {
+ if (!GLContext::Init()) return false;
+
+ bool current = MakeCurrent();
+ if (!current) {
+ gfx::LogFailure("Couldn't get device attachments for device."_ns);
+ return false;
+ }
+
+ mShareWithEGLImage =
+ mEgl->HasKHRImageBase() &&
+ mEgl->IsExtensionSupported(EGLExtension::KHR_gl_texture_2D_image) &&
+ IsExtensionSupported(OES_EGL_image);
+
+ return true;
+}
+
+bool GLContextEGL::BindTexImage() {
+ if (!mSurface) return false;
+
+ if (mBound && !ReleaseTexImage()) return false;
+
+ EGLBoolean success =
+ mEgl->fBindTexImage((EGLSurface)mSurface, LOCAL_EGL_BACK_BUFFER);
+ if (success == LOCAL_EGL_FALSE) return false;
+
+ mBound = true;
+ return true;
+}
+
+bool GLContextEGL::ReleaseTexImage() {
+ if (!mBound) return true;
+
+ if (!mSurface) return false;
+
+ EGLBoolean success;
+ success = mEgl->fReleaseTexImage((EGLSurface)mSurface, LOCAL_EGL_BACK_BUFFER);
+ if (success == LOCAL_EGL_FALSE) return false;
+
+ mBound = false;
+ return true;
+}
+
+void GLContextEGL::SetEGLSurfaceOverride(EGLSurface surf) {
+ mSurfaceOverride = surf;
+ DebugOnly<bool> ok = MakeCurrent(true);
+ MOZ_ASSERT(ok);
+}
+
+bool GLContextEGL::MakeCurrentImpl() const {
+ EGLSurface surface =
+ (mSurfaceOverride != EGL_NO_SURFACE) ? mSurfaceOverride : mSurface;
+ if (!surface) {
+ surface = mFallbackSurface;
+ }
+
+ const bool succeeded = mEgl->fMakeCurrent(surface, surface, mContext);
+ if (!succeeded) {
+ const auto eglError = mEgl->mLib->fGetError();
+ if (eglError == LOCAL_EGL_CONTEXT_LOST) {
+ OnContextLostError();
+ } else {
+ NS_WARNING("Failed to make GL context current!");
+#ifdef DEBUG
+ printf_stderr("EGL Error: 0x%04x\n", eglError);
+#endif
+ }
+ }
+
+ return succeeded;
+}
+
+bool GLContextEGL::IsCurrentImpl() const {
+ return mEgl->mLib->fGetCurrentContext() == mContext;
+}
+
+bool GLContextEGL::RenewSurface(CompositorWidget* aWidget) {
+ if (!mOwnsContext) {
+ return false;
+ }
+ // unconditionally release the surface and create a new one. Don't try to
+ // optimize this away. If we get here, then by definition we know that we want
+ // to get a new surface.
+ ReleaseSurface();
+ MOZ_ASSERT(aWidget);
+
+ EGLNativeWindowType nativeWindow =
+ GET_NATIVE_WINDOW_FROM_COMPOSITOR_WIDGET(aWidget);
+#ifdef MOZ_WAYLAND
+ // In case we're missing native window on Wayland CompositorWidget is hidden.
+ // Don't create a fallback EGL surface but fails here.
+ // We need to repeat RenewSurface() when native window is available
+ // (CompositorWidget becomes visible).
+ if (GdkIsWaylandDisplay()) {
+ NS_WARNING("Failed to get native window");
+ return false;
+ }
+#endif
+ if (nativeWindow) {
+ mSurface = mozilla::gl::CreateSurfaceFromNativeWindow(*mEgl, nativeWindow,
+ mSurfaceConfig);
+ if (!mSurface) {
+ NS_WARNING("Failed to create EGLSurface from native window");
+ return false;
+ }
+ }
+ const bool ok = MakeCurrent(true);
+ MOZ_ASSERT(ok);
+#ifdef MOZ_WIDGET_GTK
+ if (mSurface) {
+ const int interval = gfxVars::SwapIntervalEGL() ? 1 : 0;
+ mEgl->fSwapInterval(interval);
+ }
+#endif
+ return ok;
+}
+
+void GLContextEGL::ReleaseSurface() {
+ if (mOwnsContext) {
+ mozilla::gl::DestroySurface(*mEgl, mSurface);
+ }
+ if (mSurface == mSurfaceOverride) {
+ mSurfaceOverride = EGL_NO_SURFACE;
+ }
+ mSurface = EGL_NO_SURFACE;
+}
+
+Maybe<SymbolLoader> GLContextEGL::GetSymbolLoader() const {
+ return mEgl->mLib->GetSymbolLoader();
+}
+
+bool GLContextEGL::SwapBuffers() {
+ EGLSurface surface =
+ mSurfaceOverride != EGL_NO_SURFACE ? mSurfaceOverride : mSurface;
+ if (surface) {
+ if ((mEgl->IsExtensionSupported(
+ EGLExtension::EXT_swap_buffers_with_damage) ||
+ mEgl->IsExtensionSupported(
+ EGLExtension::KHR_swap_buffers_with_damage))) {
+ std::vector<EGLint> rects;
+ for (auto iter = mDamageRegion.RectIter(); !iter.Done(); iter.Next()) {
+ const IntRect& r = iter.Get();
+ rects.push_back(r.X());
+ rects.push_back(r.Y());
+ rects.push_back(r.Width());
+ rects.push_back(r.Height());
+ }
+ mDamageRegion.SetEmpty();
+ return mEgl->fSwapBuffersWithDamage(surface, rects.data(),
+ rects.size() / 4);
+ }
+ return mEgl->fSwapBuffers(surface);
+ } else {
+ return false;
+ }
+}
+
+void GLContextEGL::SetDamage(const nsIntRegion& aDamageRegion) {
+ mDamageRegion = aDamageRegion;
+}
+
+void GLContextEGL::GetWSIInfo(nsCString* const out) const {
+ out->AppendLiteral("EGL_VENDOR: ");
+ out->Append(
+ (const char*)mEgl->mLib->fQueryString(mEgl->mDisplay, LOCAL_EGL_VENDOR));
+
+ out->AppendLiteral("\nEGL_VERSION: ");
+ out->Append(
+ (const char*)mEgl->mLib->fQueryString(mEgl->mDisplay, LOCAL_EGL_VERSION));
+
+ out->AppendLiteral("\nEGL_EXTENSIONS: ");
+ out->Append((const char*)mEgl->mLib->fQueryString(mEgl->mDisplay,
+ LOCAL_EGL_EXTENSIONS));
+
+#ifndef ANDROID // This query will crash some old android.
+ out->AppendLiteral("\nEGL_EXTENSIONS(nullptr): ");
+ out->Append(
+ (const char*)mEgl->mLib->fQueryString(nullptr, LOCAL_EGL_EXTENSIONS));
+#endif
+}
+
+bool GLContextEGL::HasExtBufferAge() const {
+ return mEgl->IsExtensionSupported(EGLExtension::EXT_buffer_age);
+}
+
+bool GLContextEGL::HasKhrPartialUpdate() const {
+ return mEgl->IsExtensionSupported(EGLExtension::KHR_partial_update);
+}
+
+GLint GLContextEGL::GetBufferAge() const {
+ EGLSurface surface =
+ mSurfaceOverride != EGL_NO_SURFACE ? mSurfaceOverride : mSurface;
+
+ if (surface && (HasExtBufferAge() || HasKhrPartialUpdate())) {
+ EGLint result;
+ mEgl->fQuerySurface(surface, LOCAL_EGL_BUFFER_AGE_EXT, &result);
+ return result;
+ }
+
+ return 0;
+}
+
+#define LOCAL_EGL_CONTEXT_PROVOKING_VERTEX_DONT_CARE_MOZ 0x6000
+
+RefPtr<GLContextEGL> GLContextEGL::CreateGLContext(
+ const std::shared_ptr<EglDisplay> egl, const GLContextDesc& desc,
+ EGLConfig surfaceConfig, EGLSurface surface, const bool useGles,
+ EGLConfig contextConfig, nsACString* const out_failureId) {
+ const auto& flags = desc.flags;
+
+ std::vector<EGLint> required_attribs;
+
+ if (useGles) {
+ // TODO: This fBindAPI could be more thread-safe
+ if (egl->mLib->fBindAPI(LOCAL_EGL_OPENGL_ES_API) == LOCAL_EGL_FALSE) {
+ *out_failureId = "FEATURE_FAILURE_EGL_ES"_ns;
+ NS_WARNING("Failed to bind API to GLES!");
+ return nullptr;
+ }
+ required_attribs.push_back(LOCAL_EGL_CONTEXT_MAJOR_VERSION);
+ if (flags & CreateContextFlags::PREFER_ES3) {
+ required_attribs.push_back(3);
+ } else {
+ required_attribs.push_back(2);
+ }
+ } else {
+ if (egl->mLib->fBindAPI(LOCAL_EGL_OPENGL_API) == LOCAL_EGL_FALSE) {
+ *out_failureId = "FEATURE_FAILURE_EGL"_ns;
+ NS_WARNING("Failed to bind API to GL!");
+ return nullptr;
+ }
+ if (flags & CreateContextFlags::REQUIRE_COMPAT_PROFILE) {
+ required_attribs.push_back(LOCAL_EGL_CONTEXT_OPENGL_PROFILE_MASK);
+ required_attribs.push_back(
+ LOCAL_EGL_CONTEXT_OPENGL_COMPATIBILITY_PROFILE_BIT);
+ required_attribs.push_back(LOCAL_EGL_CONTEXT_MAJOR_VERSION);
+ required_attribs.push_back(2);
+ } else {
+ // !REQUIRE_COMPAT_PROFILE means core profle.
+ required_attribs.push_back(LOCAL_EGL_CONTEXT_OPENGL_PROFILE_MASK);
+ required_attribs.push_back(LOCAL_EGL_CONTEXT_OPENGL_CORE_PROFILE_BIT);
+ required_attribs.push_back(LOCAL_EGL_CONTEXT_MAJOR_VERSION);
+ required_attribs.push_back(3);
+ required_attribs.push_back(LOCAL_EGL_CONTEXT_MINOR_VERSION);
+ required_attribs.push_back(2);
+ }
+ }
+
+ if ((flags & CreateContextFlags::PREFER_EXACT_VERSION) &&
+ egl->mLib->IsANGLE()) {
+ required_attribs.push_back(
+ LOCAL_EGL_CONTEXT_OPENGL_BACKWARDS_COMPATIBLE_ANGLE);
+ required_attribs.push_back(LOCAL_EGL_FALSE);
+ }
+
+ const auto debugFlags = GLContext::ChooseDebugFlags(flags);
+ if (!debugFlags && flags & CreateContextFlags::NO_VALIDATION &&
+ egl->IsExtensionSupported(EGLExtension::KHR_create_context_no_error)) {
+ required_attribs.push_back(LOCAL_EGL_CONTEXT_OPENGL_NO_ERROR_KHR);
+ required_attribs.push_back(LOCAL_EGL_TRUE);
+ }
+
+ if (flags & CreateContextFlags::PROVOKING_VERTEX_DONT_CARE &&
+ egl->IsExtensionSupported(
+ EGLExtension::MOZ_create_context_provoking_vertex_dont_care)) {
+ required_attribs.push_back(
+ LOCAL_EGL_CONTEXT_PROVOKING_VERTEX_DONT_CARE_MOZ);
+ required_attribs.push_back(LOCAL_EGL_TRUE);
+ }
+
+ std::vector<EGLint> ext_robustness_attribs;
+ std::vector<EGLint> ext_rbab_attribs; // RBAB: Robust Buffer Access Behavior
+ std::vector<EGLint> khr_robustness_attribs;
+ std::vector<EGLint> khr_rbab_attribs; // RBAB: Robust Buffer Access Behavior
+ if (flags & CreateContextFlags::PREFER_ROBUSTNESS) {
+ std::vector<EGLint> base_robustness_attribs = required_attribs;
+ if (egl->IsExtensionSupported(
+ EGLExtension::NV_robustness_video_memory_purge)) {
+ base_robustness_attribs.push_back(
+ LOCAL_EGL_GENERATE_RESET_ON_VIDEO_MEMORY_PURGE_NV);
+ base_robustness_attribs.push_back(LOCAL_EGL_TRUE);
+ }
+
+ if (egl->IsExtensionSupported(
+ EGLExtension::EXT_create_context_robustness)) {
+ ext_robustness_attribs = base_robustness_attribs;
+ ext_robustness_attribs.push_back(
+ LOCAL_EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_EXT);
+ ext_robustness_attribs.push_back(LOCAL_EGL_LOSE_CONTEXT_ON_RESET_EXT);
+
+ if (gfxVars::AllowEglRbab()) {
+ ext_rbab_attribs = ext_robustness_attribs;
+ ext_rbab_attribs.push_back(LOCAL_EGL_CONTEXT_OPENGL_ROBUST_ACCESS_EXT);
+ ext_rbab_attribs.push_back(LOCAL_EGL_TRUE);
+ }
+ }
+
+ if (egl->IsExtensionSupported(EGLExtension::KHR_create_context)) {
+ khr_robustness_attribs = base_robustness_attribs;
+ khr_robustness_attribs.push_back(
+ LOCAL_EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_KHR);
+ khr_robustness_attribs.push_back(LOCAL_EGL_LOSE_CONTEXT_ON_RESET_KHR);
+
+ khr_rbab_attribs = khr_robustness_attribs;
+ khr_rbab_attribs.push_back(LOCAL_EGL_CONTEXT_FLAGS_KHR);
+ khr_rbab_attribs.push_back(
+ LOCAL_EGL_CONTEXT_OPENGL_ROBUST_ACCESS_BIT_KHR);
+ }
+ }
+
+ const auto fnCreate = [&](const std::vector<EGLint>& attribs) {
+ auto terminated_attribs = attribs;
+
+ for (const auto& cur : kTerminationAttribs) {
+ terminated_attribs.push_back(cur);
+ }
+
+ return egl->fCreateContext(contextConfig, EGL_NO_CONTEXT,
+ terminated_attribs.data());
+ };
+
+ EGLContext context;
+ do {
+ if (!khr_rbab_attribs.empty()) {
+ context = fnCreate(khr_rbab_attribs);
+ if (context) break;
+ NS_WARNING("Failed to create EGLContext with khr_rbab_attribs");
+ }
+
+ if (!ext_rbab_attribs.empty()) {
+ context = fnCreate(ext_rbab_attribs);
+ if (context) break;
+ NS_WARNING("Failed to create EGLContext with ext_rbab_attribs");
+ }
+
+ if (!khr_robustness_attribs.empty()) {
+ context = fnCreate(khr_robustness_attribs);
+ if (context) break;
+ NS_WARNING("Failed to create EGLContext with khr_robustness_attribs");
+ }
+
+ if (!ext_robustness_attribs.empty()) {
+ context = fnCreate(ext_robustness_attribs);
+ if (context) break;
+ NS_WARNING("Failed to create EGLContext with ext_robustness_attribs");
+ }
+
+ context = fnCreate(required_attribs);
+ if (context) break;
+ NS_WARNING("Failed to create EGLContext with required_attribs");
+
+ *out_failureId = "FEATURE_FAILURE_EGL_CREATE"_ns;
+ return nullptr;
+ } while (false);
+ MOZ_ASSERT(context);
+
+ RefPtr<GLContextEGL> glContext =
+ new GLContextEGL(egl, desc, surfaceConfig, surface, context);
+ if (!glContext->Init()) {
+ *out_failureId = "FEATURE_FAILURE_EGL_INIT"_ns;
+ return nullptr;
+ }
+
+ if (GLContext::ShouldSpew()) {
+ printf_stderr("new GLContextEGL %p on EGLDisplay %p\n", glContext.get(),
+ egl->mDisplay);
+ }
+
+ return glContext;
+}
+
+// static
+EGLSurface GLContextEGL::CreatePBufferSurfaceTryingPowerOfTwo(
+ EglDisplay& egl, EGLConfig config, EGLenum bindToTextureFormat,
+ mozilla::gfx::IntSize& pbsize) {
+ nsTArray<EGLint> pbattrs(16);
+ EGLSurface surface = nullptr;
+
+TRY_AGAIN_POWER_OF_TWO:
+ pbattrs.Clear();
+ pbattrs.AppendElement(LOCAL_EGL_WIDTH);
+ pbattrs.AppendElement(pbsize.width);
+ pbattrs.AppendElement(LOCAL_EGL_HEIGHT);
+ pbattrs.AppendElement(pbsize.height);
+
+ if (bindToTextureFormat != LOCAL_EGL_NONE) {
+ pbattrs.AppendElement(LOCAL_EGL_TEXTURE_TARGET);
+ pbattrs.AppendElement(LOCAL_EGL_TEXTURE_2D);
+
+ pbattrs.AppendElement(LOCAL_EGL_TEXTURE_FORMAT);
+ pbattrs.AppendElement(bindToTextureFormat);
+ }
+
+ for (const auto& cur : kTerminationAttribs) {
+ pbattrs.AppendElement(cur);
+ }
+
+ surface = egl.fCreatePbufferSurface(config, &pbattrs[0]);
+ if (!surface) {
+ if (!is_power_of_two(pbsize.width) || !is_power_of_two(pbsize.height)) {
+ if (!is_power_of_two(pbsize.width))
+ pbsize.width = next_power_of_two(pbsize.width);
+ if (!is_power_of_two(pbsize.height))
+ pbsize.height = next_power_of_two(pbsize.height);
+
+ NS_WARNING("Failed to create pbuffer, trying power of two dims");
+ goto TRY_AGAIN_POWER_OF_TWO;
+ }
+
+ NS_WARNING("Failed to create pbuffer surface");
+ return nullptr;
+ }
+
+ return surface;
+}
+
+#if defined(MOZ_WAYLAND)
+SavedGLSurface::SavedGLSurface(struct wl_surface* aWaylandSurface,
+ struct wl_egl_window* aEGLWindow)
+ : mWaylandSurface(aWaylandSurface), mEGLWindow(aEGLWindow) {}
+
+SavedGLSurface::~SavedGLSurface() {
+ if (mEGLWindow) {
+ wl_egl_window_destroy(mEGLWindow);
+ }
+ if (mWaylandSurface) {
+ wl_surface_destroy(mWaylandSurface);
+ }
+}
+
+// static
+EGLSurface GLContextEGL::CreateWaylandBufferSurface(
+ EglDisplay& egl, EGLConfig config, mozilla::gfx::IntSize& pbsize) {
+ wl_egl_window* eglwindow = nullptr;
+
+ struct wl_compositor* compositor =
+ gdk_wayland_display_get_wl_compositor(gdk_display_get_default());
+ struct wl_surface* wlsurface = wl_compositor_create_surface(compositor);
+ eglwindow = wl_egl_window_create(wlsurface, pbsize.width, pbsize.height);
+ if (!eglwindow) return nullptr;
+
+ const auto surface = egl.fCreateWindowSurface(
+ config, reinterpret_cast<EGLNativeWindowType>(eglwindow), 0);
+ if (surface) {
+ MOZ_ASSERT(!sSavedGLSurfaces.Contains(surface));
+ sSavedGLSurfaces.LookupOrInsert(surface,
+ new SavedGLSurface(wlsurface, eglwindow));
+ }
+ return surface;
+}
+#endif
+
+static const EGLint kEGLConfigAttribsRGB16[] = {
+ LOCAL_EGL_SURFACE_TYPE, LOCAL_EGL_WINDOW_BIT,
+ LOCAL_EGL_RED_SIZE, 5,
+ LOCAL_EGL_GREEN_SIZE, 6,
+ LOCAL_EGL_BLUE_SIZE, 5,
+ LOCAL_EGL_ALPHA_SIZE, 0};
+
+static const EGLint kEGLConfigAttribsRGB24[] = {
+ LOCAL_EGL_SURFACE_TYPE, LOCAL_EGL_WINDOW_BIT,
+ LOCAL_EGL_RED_SIZE, 8,
+ LOCAL_EGL_GREEN_SIZE, 8,
+ LOCAL_EGL_BLUE_SIZE, 8,
+ LOCAL_EGL_ALPHA_SIZE, 0};
+
+static const EGLint kEGLConfigAttribsRGBA32[] = {
+ LOCAL_EGL_SURFACE_TYPE, LOCAL_EGL_WINDOW_BIT,
+ LOCAL_EGL_RED_SIZE, 8,
+ LOCAL_EGL_GREEN_SIZE, 8,
+ LOCAL_EGL_BLUE_SIZE, 8,
+ LOCAL_EGL_ALPHA_SIZE, 8};
+
+bool CreateConfig(EglDisplay& aEgl, EGLConfig* aConfig, int32_t aDepth,
+ bool aEnableDepthBuffer, bool aUseGles, bool aAllowFallback) {
+ EGLConfig configs[64];
+ std::vector<EGLint> attribs;
+ EGLint ncfg = ArrayLength(configs);
+
+ switch (aDepth) {
+ case 16:
+ for (const auto& cur : kEGLConfigAttribsRGB16) {
+ attribs.push_back(cur);
+ }
+ break;
+ case 24:
+ for (const auto& cur : kEGLConfigAttribsRGB24) {
+ attribs.push_back(cur);
+ }
+ break;
+ case 32:
+ for (const auto& cur : kEGLConfigAttribsRGBA32) {
+ attribs.push_back(cur);
+ }
+ break;
+ default:
+ NS_ERROR("Unknown pixel depth");
+ return false;
+ }
+
+ if (aUseGles) {
+ attribs.push_back(LOCAL_EGL_RENDERABLE_TYPE);
+ attribs.push_back(LOCAL_EGL_OPENGL_ES2_BIT);
+ }
+ for (const auto& cur : kTerminationAttribs) {
+ attribs.push_back(cur);
+ }
+
+ if (!aEgl.fChooseConfig(attribs.data(), configs, ncfg, &ncfg) || ncfg < 1) {
+ return false;
+ }
+
+ Maybe<EGLConfig> fallbackConfig;
+
+ for (int j = 0; j < ncfg; ++j) {
+ EGLConfig config = configs[j];
+ EGLint r, g, b, a;
+ if (aEgl.fGetConfigAttrib(config, LOCAL_EGL_RED_SIZE, &r) &&
+ aEgl.fGetConfigAttrib(config, LOCAL_EGL_GREEN_SIZE, &g) &&
+ aEgl.fGetConfigAttrib(config, LOCAL_EGL_BLUE_SIZE, &b) &&
+ aEgl.fGetConfigAttrib(config, LOCAL_EGL_ALPHA_SIZE, &a) &&
+ ((aDepth == 16 && r == 5 && g == 6 && b == 5) ||
+ (aDepth == 24 && r == 8 && g == 8 && b == 8) ||
+ (aDepth == 32 && r == 8 && g == 8 && b == 8 && a == 8))) {
+ EGLint z;
+ if (aEnableDepthBuffer) {
+ if (!aEgl.fGetConfigAttrib(config, LOCAL_EGL_DEPTH_SIZE, &z) ||
+ z != 24) {
+ continue;
+ }
+ }
+#ifdef MOZ_X11
+ if (GdkIsX11Display()) {
+ int configVisualID;
+ if (!aEgl.fGetConfigAttrib(config, LOCAL_EGL_NATIVE_VISUAL_ID,
+ &configVisualID)) {
+ continue;
+ }
+
+ XVisualInfo visual_info_template, *visual_info;
+ int num_visuals;
+
+ visual_info_template.visualid = configVisualID;
+ visual_info =
+ XGetVisualInfo(GDK_DISPLAY_XDISPLAY(gdk_display_get_default()),
+ VisualIDMask, &visual_info_template, &num_visuals);
+
+ if (!visual_info || visual_info->depth != aDepth) {
+ if (aAllowFallback && !fallbackConfig) {
+ fallbackConfig = Some(config);
+ }
+ continue;
+ }
+ }
+#endif
+ *aConfig = config;
+ return true;
+ }
+ }
+
+ if (kIsX11 && fallbackConfig) {
+ *aConfig = fallbackConfig.value();
+ return true;
+ }
+
+ return false;
+}
+
+// Return true if a suitable EGLConfig was found and pass it out
+// through aConfig. Return false otherwise.
+//
+// NB: It's entirely legal for the returned EGLConfig to be valid yet
+// have the value null.
+static bool CreateConfigScreen(EglDisplay& egl, EGLConfig* const aConfig,
+ const bool aEnableDepthBuffer,
+ const bool aUseGles) {
+ int32_t depth = gfxVars::ScreenDepth();
+ if (CreateConfig(egl, aConfig, depth, aEnableDepthBuffer, aUseGles)) {
+ return true;
+ }
+#ifdef MOZ_WIDGET_ANDROID
+ // Bug 736005
+ // Android doesn't always support 16 bit so also try 24 bit
+ if (depth == 16) {
+ return CreateConfig(egl, aConfig, 24, aEnableDepthBuffer, aUseGles);
+ }
+ // Bug 970096
+ // Some devices that have 24 bit screens only support 16 bit OpenGL?
+ if (depth == 24) {
+ return CreateConfig(egl, aConfig, 16, aEnableDepthBuffer, aUseGles);
+ }
+#endif
+ return false;
+}
+
+already_AddRefed<GLContext> GLContextProviderEGL::CreateForCompositorWidget(
+ CompositorWidget* aCompositorWidget, bool aHardwareWebRender,
+ bool /*aForceAccelerated*/) {
+ EGLNativeWindowType window = nullptr;
+ if (aCompositorWidget) {
+ window = GET_NATIVE_WINDOW_FROM_COMPOSITOR_WIDGET(aCompositorWidget);
+ }
+ return GLContextEGLFactory::Create(window, aHardwareWebRender);
+}
+
+EGLSurface GLContextEGL::CreateCompatibleSurface(void* aWindow) const {
+ MOZ_ASSERT(aWindow);
+ MOZ_RELEASE_ASSERT(mSurfaceConfig != EGL_NO_CONFIG);
+
+ // NOTE: aWindow is an ANativeWindow
+ EGLSurface surface = mEgl->fCreateWindowSurface(
+ mSurfaceConfig, reinterpret_cast<EGLNativeWindowType>(aWindow), nullptr);
+ if (!surface) {
+ gfxCriticalError() << "CreateCompatibleSurface failed: "
+ << hexa(GetError());
+ }
+ return surface;
+}
+
+static void FillContextAttribs(bool es3, bool useGles, nsTArray<EGLint>* out) {
+ out->AppendElement(LOCAL_EGL_SURFACE_TYPE);
+#ifdef MOZ_WAYLAND
+ if (GdkIsWaylandDisplay()) {
+ // Wayland on desktop does not support PBuffer or FBO.
+ // We create a dummy wl_egl_window instead.
+ out->AppendElement(LOCAL_EGL_WINDOW_BIT);
+ } else
+#endif
+ {
+ out->AppendElement(LOCAL_EGL_PBUFFER_BIT);
+ }
+
+ if (useGles) {
+ out->AppendElement(LOCAL_EGL_RENDERABLE_TYPE);
+ if (es3) {
+ out->AppendElement(LOCAL_EGL_OPENGL_ES3_BIT_KHR);
+ } else {
+ out->AppendElement(LOCAL_EGL_OPENGL_ES2_BIT);
+ }
+ }
+
+ out->AppendElement(LOCAL_EGL_RED_SIZE);
+ out->AppendElement(8);
+
+ out->AppendElement(LOCAL_EGL_GREEN_SIZE);
+ out->AppendElement(8);
+
+ out->AppendElement(LOCAL_EGL_BLUE_SIZE);
+ out->AppendElement(8);
+
+ out->AppendElement(LOCAL_EGL_ALPHA_SIZE);
+ out->AppendElement(8);
+
+ out->AppendElement(LOCAL_EGL_DEPTH_SIZE);
+ out->AppendElement(0);
+
+ out->AppendElement(LOCAL_EGL_STENCIL_SIZE);
+ out->AppendElement(0);
+
+ // EGL_ATTRIBS_LIST_SAFE_TERMINATION_WORKING_AROUND_BUGS
+ out->AppendElement(LOCAL_EGL_NONE);
+ out->AppendElement(0);
+
+ out->AppendElement(0);
+ out->AppendElement(0);
+}
+
+/*
+/// Useful for debugging, but normally unused.
+static GLint GetAttrib(GLLibraryEGL* egl, EGLConfig config, EGLint attrib) {
+ EGLint bits = 0;
+ egl->fGetConfigAttrib(config, attrib, &bits);
+ MOZ_ASSERT(egl->fGetError() == LOCAL_EGL_SUCCESS);
+
+ return bits;
+}
+*/
+
+static EGLConfig ChooseConfig(EglDisplay& egl, const GLContextCreateDesc& desc,
+ const bool useGles) {
+ nsTArray<EGLint> configAttribList;
+ FillContextAttribs(bool(desc.flags & CreateContextFlags::PREFER_ES3), useGles,
+ &configAttribList);
+
+ const EGLint* configAttribs = configAttribList.Elements();
+
+ // The sorting dictated by the spec for eglChooseConfig reasonably assures
+ // that a reasonable 'best' config is on top.
+ const EGLint kMaxConfigs = 1;
+ EGLConfig configs[kMaxConfigs];
+ EGLint foundConfigs = 0;
+ if (!egl.fChooseConfig(configAttribs, configs, kMaxConfigs, &foundConfigs) ||
+ foundConfigs == 0) {
+ return EGL_NO_CONFIG;
+ }
+
+ EGLConfig config = configs[0];
+ return config;
+}
+
+#ifdef MOZ_X11
+/* static */
+bool GLContextEGL::FindVisual(int* const out_visualId) {
+ nsCString discardFailureId;
+ const auto egl = DefaultEglDisplay(&discardFailureId);
+ if (!egl) {
+ gfxCriticalNote
+ << "GLContextEGL::FindVisual(): Failed to load EGL library!";
+ return false;
+ }
+
+ EGLConfig config;
+ const int bpp = 32;
+ if (!CreateConfig(*egl, &config, bpp, /* aEnableDepthBuffer */ false,
+ /* aUseGles */ false, /* aAllowFallback */ false)) {
+ // We are on a buggy driver. Do not return a visual so a fallback path can
+ // be used. See https://gitlab.freedesktop.org/mesa/mesa/-/issues/149
+ return false;
+ }
+ if (egl->fGetConfigAttrib(config, LOCAL_EGL_NATIVE_VISUAL_ID, out_visualId)) {
+ return true;
+ }
+ return false;
+}
+#endif
+
+/*static*/
+RefPtr<GLContextEGL> GLContextEGL::CreateWithoutSurface(
+ const std::shared_ptr<EglDisplay> egl, const GLContextCreateDesc& desc,
+ nsACString* const out_failureId) {
+ const auto WithUseGles = [&](const bool useGles) -> RefPtr<GLContextEGL> {
+#ifdef MOZ_WIDGET_GTK
+ // First try creating a context with no config and no surface, this is what
+ // we really want, and seems to be the only way to make selecting software
+ // Mesa init properly when it's not the first device.
+ if (egl->IsExtensionSupported(EGLExtension::KHR_no_config_context) &&
+ egl->IsExtensionSupported(EGLExtension::KHR_surfaceless_context)) {
+ // These extensions have been supported by mesa and nvidia drivers
+ // since 2014 or earlier, this is the preferred code path
+ auto fullDesc = GLContextDesc{desc};
+ fullDesc.isOffscreen = true;
+ RefPtr<GLContextEGL> gl = GLContextEGL::CreateGLContext(
+ egl, fullDesc, EGL_NO_CONFIG, EGL_NO_SURFACE, useGles, EGL_NO_CONFIG,
+ out_failureId);
+ if (gl) {
+ return gl;
+ }
+ NS_WARNING(
+ "Failed to create GLContext with no config and no surface, will try "
+ "ChooseConfig");
+ }
+#endif
+
+ const EGLConfig surfaceConfig = ChooseConfig(*egl, desc, useGles);
+ if (surfaceConfig == EGL_NO_CONFIG) {
+ *out_failureId = "FEATURE_FAILURE_EGL_NO_CONFIG"_ns;
+ NS_WARNING("Failed to find a compatible config.");
+ return nullptr;
+ }
+
+ if (GLContext::ShouldSpew()) {
+ egl->DumpEGLConfig(surfaceConfig);
+ }
+ const EGLConfig contextConfig =
+ egl->IsExtensionSupported(EGLExtension::KHR_no_config_context)
+ ? nullptr
+ : surfaceConfig;
+
+ auto dummySize = mozilla::gfx::IntSize{16, 16};
+ EGLSurface surface = nullptr;
+#ifdef MOZ_WAYLAND
+ if (GdkIsWaylandDisplay()) {
+ surface = GLContextEGL::CreateWaylandBufferSurface(*egl, surfaceConfig,
+ dummySize);
+ } else
+#endif
+ {
+ surface = GLContextEGL::CreatePBufferSurfaceTryingPowerOfTwo(
+ *egl, surfaceConfig, LOCAL_EGL_NONE, dummySize);
+ }
+ if (!surface) {
+ *out_failureId = "FEATURE_FAILURE_EGL_POT"_ns;
+ NS_WARNING("Failed to create PBuffer for context!");
+ return nullptr;
+ }
+
+ auto fullDesc = GLContextDesc{desc};
+ fullDesc.isOffscreen = true;
+ RefPtr<GLContextEGL> gl =
+ GLContextEGL::CreateGLContext(egl, fullDesc, surfaceConfig, surface,
+ useGles, contextConfig, out_failureId);
+ if (!gl) {
+ NS_WARNING("Failed to create GLContext from PBuffer");
+ egl->fDestroySurface(surface);
+#if defined(MOZ_WAYLAND)
+ DeleteSavedGLSurface(surface);
+#endif
+ return nullptr;
+ }
+
+ return gl;
+ };
+
+ bool preferGles;
+#if defined(MOZ_WIDGET_ANDROID)
+ preferGles = true;
+#else
+ preferGles = StaticPrefs::gfx_egl_prefer_gles_enabled_AtStartup();
+#endif // defined(MOZ_WIDGET_ANDROID)
+ RefPtr<GLContextEGL> gl = WithUseGles(preferGles);
+#if !defined(MOZ_WIDGET_ANDROID)
+ if (!gl) {
+ gl = WithUseGles(!preferGles);
+ }
+#endif // !defined(MOZ_WIDGET_ANDROID)
+ return gl;
+}
+
+/*static*/
+already_AddRefed<GLContext> GLContextProviderEGL::CreateHeadless(
+ const GLContextCreateDesc& desc, nsACString* const out_failureId) {
+ const auto display = DefaultEglDisplay(out_failureId);
+ if (!display) {
+ return nullptr;
+ }
+ auto ret = GLContextEGL::CreateWithoutSurface(display, desc, out_failureId);
+ return ret.forget();
+}
+
+// Don't want a global context on Android as 1) share groups across 2 threads
+// fail on many Tegra drivers (bug 759225) and 2) some mobile devices have a
+// very strict limit on global number of GL contexts (bug 754257) and 3) each
+// EGL context eats 750k on B2G (bug 813783)
+/*static*/
+GLContext* GLContextProviderEGL::GetGlobalContext() { return nullptr; }
+
+// -
+
+/*static*/ void GLContextProviderEGL::Shutdown() { GLLibraryEGL::Shutdown(); }
+
+} /* namespace gl */
+} /* namespace mozilla */
+
+#undef EGL_ATTRIBS_LIST_SAFE_TERMINATION_WORKING_AROUND_BUGS