Add m-esr52 at 52.6.0

1 files changed, 797 insertions, 0 deletions

diff --git a/gfx/gl/GLLibraryEGL.cpp b/gfx/gl/GLLibraryEGL.cpp
new file mode 100644
index 000000000..130bce119
--- /dev/null
+++ b/gfx/gl/GLLibraryEGL.cpp
@@ -0,0 +1,797 @@
+/* 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 "angle/Platform.h"
+#include "gfxConfig.h"
+#include "gfxCrashReporterUtils.h"
+#include "gfxUtils.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/Assertions.h"
+#include "mozilla/Telemetry.h"
+#include "mozilla/Tokenizer.h"
+#include "mozilla/ScopeExit.h"
+#include "mozilla/Unused.h"
+#include "nsDirectoryServiceDefs.h"
+#include "nsDirectoryServiceUtils.h"
+#include "nsIGfxInfo.h"
+#include "nsPrintfCString.h"
+#ifdef XP_WIN
+#include "nsWindowsHelpers.h"
+#endif
+#include "OGLShaderProgram.h"
+#include "prenv.h"
+#include "GLContext.h"
+#include "GLContextProvider.h"
+#include "gfxPrefs.h"
+#include "ScopedGLHelpers.h"
+
+namespace mozilla {
+namespace gl {
+
+StaticMutex GLLibraryEGL::sMutex;
+GLLibraryEGL sEGLLibrary;
+#ifdef MOZ_B2G
+MOZ_THREAD_LOCAL(EGLContext) GLLibraryEGL::sCurrentContext;
+#endif
+
+// 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_KHR_lock_surface",
+    "EGL_ANGLE_surface_d3d_texture_2d_share_handle",
+    "EGL_EXT_create_context_robustness",
+    "EGL_KHR_image",
+    "EGL_KHR_fence_sync",
+    "EGL_ANDROID_native_fence_sync",
+    "EGL_ANDROID_image_crop",
+    "EGL_ANGLE_platform_angle",
+    "EGL_ANGLE_platform_angle_d3d"
+};
+
+#if defined(ANDROID)
+
+static PRLibrary* LoadApitraceLibrary()
+{
+    // Initialization of gfx prefs here is only needed during the unit tests...
+    gfxPrefs::GetSingleton();
+    if (!gfxPrefs::UseApitrace()) {
+        return nullptr;
+    }
+
+    static PRLibrary* sApitraceLibrary = nullptr;
+
+    if (sApitraceLibrary)
+        return sApitraceLibrary;
+
+    nsCString logFile = Preferences::GetCString("gfx.apitrace.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());
+
+    // 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", APITRACE_LIB);
+
+    sApitraceLibrary = PR_LoadLibrary(APITRACE_LIB);
+
+    return sApitraceLibrary;
+}
+
+#endif // ANDROID
+
+#ifdef XP_WIN
+// see the comment in GLLibraryEGL::EnsureInitialized() for the rationale here.
+static PRLibrary*
+LoadLibraryForEGLOnWindows(const nsAString& filename)
+{
+    nsCOMPtr<nsIFile> file;
+    nsresult rv = NS_GetSpecialDirectory(NS_GRE_DIR, getter_AddRefs(file));
+    if (NS_FAILED(rv))
+        return nullptr;
+
+    file->Append(filename);
+    PRLibrary* lib = nullptr;
+    rv = file->Load(&lib);
+    if (NS_FAILED(rv)) {
+        nsPrintfCString msg("Failed to load %s - Expect EGL initialization to fail",
+                            NS_LossyConvertUTF16toASCII(filename).get());
+        NS_WARNING(msg.get());
+    }
+    return lib;
+}
+
+#endif // XP_WIN
+
+static EGLDisplay
+GetAndInitWARPDisplay(GLLibraryEGL& egl, void* displayType)
+{
+    EGLint attrib_list[] = {  LOCAL_EGL_PLATFORM_ANGLE_DEVICE_TYPE_ANGLE,
+                              LOCAL_EGL_PLATFORM_ANGLE_DEVICE_TYPE_WARP_ANGLE,
+                              // Requires:
+                              LOCAL_EGL_PLATFORM_ANGLE_TYPE_ANGLE,
+                              LOCAL_EGL_PLATFORM_ANGLE_TYPE_D3D11_ANGLE,
+                              LOCAL_EGL_NONE };
+    EGLDisplay display = egl.fGetPlatformDisplayEXT(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 EGL_NO_DISPLAY;
+    }
+
+    if (!egl.fInitialize(display, nullptr, nullptr))
+        return EGL_NO_DISPLAY;
+
+    return display;
+}
+
+static bool
+IsAccelAngleSupported(const nsCOMPtr<nsIGfxInfo>& gfxInfo,
+                      nsACString* const out_failureId)
+{
+    int32_t angleSupport;
+    nsCString failureId;
+    gfxUtils::ThreadSafeGetFeatureStatus(gfxInfo,
+                                         nsIGfxInfo::FEATURE_WEBGL_ANGLE,
+                                         failureId,
+                                         &angleSupport);
+    if (failureId.IsEmpty() && angleSupport != nsIGfxInfo::FEATURE_STATUS_OK) {
+        // This shouldn't happen, if we see this it's because we've missed
+        // some failure paths
+        failureId = NS_LITERAL_CSTRING("FEATURE_FAILURE_ACCL_ANGLE_NOT_OK");
+    }
+    if (out_failureId->IsEmpty()) {
+        *out_failureId = failureId;
+    }
+    return (angleSupport == nsIGfxInfo::FEATURE_STATUS_OK);
+}
+
+static EGLDisplay
+GetAndInitDisplay(GLLibraryEGL& egl, void* displayType)
+{
+    EGLDisplay display = egl.fGetDisplay(displayType);
+    if (display == EGL_NO_DISPLAY)
+        return EGL_NO_DISPLAY;
+
+    if (!egl.fInitialize(display, nullptr, nullptr))
+        return EGL_NO_DISPLAY;
+
+    return display;
+}
+
+class AngleErrorReporting: public angle::Platform {
+public:
+    AngleErrorReporting()
+    {
+      // No static constructor
+    }
+
+    void SetFailureId(nsACString* const aFailureId)
+    {
+      mFailureId = aFailureId;
+    }
+
+    void logError(const char *errorMessage) override
+    {
+        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("%i", intToken.AsInteger());
+        } else {
+            *mFailureId = "FAILURE_ID_ANGLE_UNKNOWN";
+        }
+    }
+private:
+    nsACString* mFailureId;
+};
+
+AngleErrorReporting gAngleErrorReporter;
+
+static EGLDisplay
+GetAndInitDisplayForAccelANGLE(GLLibraryEGL& egl, nsACString* const out_failureId)
+{
+    EGLDisplay ret = 0;
+
+    FeatureState& d3d11ANGLE = gfxConfig::GetFeature(Feature::D3D11_HW_ANGLE);
+
+    if (!gfxPrefs::WebGLANGLETryD3D11())
+        d3d11ANGLE.UserDisable("User disabled D3D11 ANGLE by pref",
+                               NS_LITERAL_CSTRING("FAILURE_ID_ANGLE_PREF"));
+
+    if (gfxPrefs::WebGLANGLEForceD3D11())
+        d3d11ANGLE.UserForceEnable("User force-enabled D3D11 ANGLE on disabled hardware");
+
+    gAngleErrorReporter.SetFailureId(out_failureId);
+    egl.fANGLEPlatformInitialize(&gAngleErrorReporter);
+
+    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 (gfxConfig::IsForcedOnByUser(Feature::D3D11_HW_ANGLE)) {
+        return GetAndInitDisplay(egl, LOCAL_EGL_D3D11_ONLY_DISPLAY_ANGLE);
+    }
+
+    if (d3d11ANGLE.IsEnabled()) {
+        ret = GetAndInitDisplay(egl, LOCAL_EGL_D3D11_ELSE_D3D9_DISPLAY_ANGLE);
+    }
+
+    if (!ret) {
+        ret = GetAndInitDisplay(egl, EGL_DEFAULT_DISPLAY);
+    }
+
+    if (!ret && out_failureId->IsEmpty()) {
+        *out_failureId = NS_LITERAL_CSTRING("FEATURE_FAILURE_ACCL_ANGLE_NO_DISP");
+    }
+
+    return ret;
+}
+
+bool
+GLLibraryEGL::ReadbackEGLImage(EGLImage image, gfx::DataSourceSurface* out_surface)
+{
+    StaticMutexAutoUnlock lock(sMutex);
+    if (!mReadbackGL) {
+        nsCString discardFailureId;
+        mReadbackGL = gl::GLContextProvider::CreateHeadless(gl::CreateContextFlags::NONE,
+                                                            &discardFailureId);
+    }
+
+    ScopedTexture destTex(mReadbackGL);
+    const GLuint target = mReadbackGL->GetPreferredEGLImageTextureTarget();
+    ScopedBindTexture autoTex(mReadbackGL, destTex.Texture(), target);
+    mReadbackGL->fTexParameteri(target, LOCAL_GL_TEXTURE_WRAP_S, LOCAL_GL_CLAMP_TO_EDGE);
+    mReadbackGL->fTexParameteri(target, LOCAL_GL_TEXTURE_WRAP_T, LOCAL_GL_CLAMP_TO_EDGE);
+    mReadbackGL->fTexParameteri(target, LOCAL_GL_TEXTURE_MAG_FILTER, LOCAL_GL_NEAREST);
+    mReadbackGL->fTexParameteri(target, LOCAL_GL_TEXTURE_MIN_FILTER, LOCAL_GL_NEAREST);
+    mReadbackGL->fEGLImageTargetTexture2D(target, image);
+
+    ShaderConfigOGL config = ShaderConfigFromTargetAndFormat(target,
+                                                             out_surface->GetFormat());
+    int shaderConfig = config.mFeatures;
+    mReadbackGL->ReadTexImageHelper()->ReadTexImage(out_surface, 0, target,
+                                                    out_surface->GetSize(), shaderConfig);
+
+    return true;
+}
+
+bool
+GLLibraryEGL::EnsureInitialized(bool forceAccel, nsACString* const out_failureId)
+{
+    if (mInitialized) {
+        return true;
+    }
+
+    mozilla::ScopedGfxFeatureReporter reporter("EGL");
+
+#ifdef MOZ_B2G
+    if (!sCurrentContext.init())
+      MOZ_CRASH("GFX: Tls init failed");
+#endif
+
+#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 and we ship with at least _43. So there is no point
+            // trying _46 and _43 in the system directory.
+
+            if (LoadLibrarySystem32(L"d3dcompiler_47.dll"))
+                break;
+
+#ifdef MOZ_D3DCOMPILER_VISTA_DLL
+            if (LoadLibraryForEGLOnWindows(NS_LITERAL_STRING(NS_STRINGIFY(MOZ_D3DCOMPILER_VISTA_DLL))))
+                break;
+#endif
+
+#ifdef MOZ_D3DCOMPILER_XP_DLL
+            if (LoadLibraryForEGLOnWindows(NS_LITERAL_STRING(NS_STRINGIFY(MOZ_D3DCOMPILER_XP_DLL))))
+                break;
+#endif
+
+            MOZ_ASSERT(false, "d3dcompiler DLL loading failed.");
+        } while (false);
+
+        LoadLibraryForEGLOnWindows(NS_LITERAL_STRING("libGLESv2.dll"));
+
+        mEGLLibrary = LoadLibraryForEGLOnWindows(NS_LITERAL_STRING("libEGL.dll"));
+
+        if (!mEGLLibrary) {
+            *out_failureId = NS_LITERAL_CSTRING("FEATURE_FAILURE_EGL_LOAD");
+            return false;
+        }
+    }
+
+#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) {
+        printf_stderr("Attempting load of libEGL.so\n");
+        mEGLLibrary = PR_LoadLibrary("libEGL.so");
+    }
+#if defined(XP_UNIX)
+    if (!mEGLLibrary) {
+        mEGLLibrary = PR_LoadLibrary("libEGL.so.1");
+    }
+#endif
+
+    if (!mEGLLibrary) {
+        NS_WARNING("Couldn't load EGL LIB.");
+        *out_failureId = NS_LITERAL_CSTRING("FEATURE_FAILURE_EGL_LOAD_2");
+        return false;
+    }
+
+#endif // !Windows
+
+#define SYMBOL(name) \
+{ (PRFuncPtr*) &mSymbols.f##name, { "egl" #name, nullptr } }
+
+    GLLibraryLoader::SymLoadStruct earlySymbols[] = {
+        SYMBOL(GetDisplay),
+        SYMBOL(Terminate),
+        SYMBOL(GetCurrentSurface),
+        SYMBOL(GetCurrentContext),
+        SYMBOL(MakeCurrent),
+        SYMBOL(DestroyContext),
+        SYMBOL(CreateContext),
+        SYMBOL(DestroySurface),
+        SYMBOL(CreateWindowSurface),
+        SYMBOL(CreatePbufferSurface),
+        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(QuerySurface),
+        { nullptr, { nullptr } }
+    };
+
+    if (!GLLibraryLoader::LoadSymbols(mEGLLibrary, &earlySymbols[0])) {
+        NS_WARNING("Couldn't find required entry points in EGL library (early init)");
+        *out_failureId = NS_LITERAL_CSTRING("FEATURE_FAILURE_EGL_SYM");
+        return false;
+    }
+
+    GLLibraryLoader::SymLoadStruct optionalSymbols[] = {
+        // On Android 4.3 and up, certain features like ANDROID_native_fence_sync
+        // can only be queried by using a special eglQueryString.
+        { (PRFuncPtr*) &mSymbols.fQueryStringImplementationANDROID,
+          { "_Z35eglQueryStringImplementationANDROIDPvi", nullptr } },
+        { nullptr, { nullptr } }
+    };
+
+    // Do not warn about the failure to load this - see bug 1092191
+    Unused << GLLibraryLoader::LoadSymbols(mEGLLibrary, &optionalSymbols[0],
+                                           nullptr, nullptr, false);
+
+    InitClientExtensions();
+
+    const auto lookupFunction =
+        (GLLibraryLoader::PlatformLookupFunction)mSymbols.fGetProcAddress;
+
+    // Client exts are ready. (But not display exts!)
+    if (IsExtensionSupported(ANGLE_platform_angle_d3d)) {
+        GLLibraryLoader::SymLoadStruct d3dSymbols[] = {
+            { (PRFuncPtr*)&mSymbols.fANGLEPlatformInitialize, { "ANGLEPlatformInitialize", nullptr } },
+            { (PRFuncPtr*)&mSymbols.fANGLEPlatformShutdown,   { "ANGLEPlatformShutdown", nullptr } },
+            { (PRFuncPtr*)&mSymbols.fGetPlatformDisplayEXT,   { "eglGetPlatformDisplayEXT", nullptr } },
+            { nullptr, { nullptr } }
+        };
+
+        bool success = GLLibraryLoader::LoadSymbols(mEGLLibrary,
+                                                    &d3dSymbols[0],
+                                                    lookupFunction);
+        if (!success) {
+            NS_ERROR("EGL supports ANGLE_platform_angle_d3d without exposing its functions!");
+
+            MarkExtensionUnsupported(ANGLE_platform_angle_d3d);
+
+            mSymbols.fGetPlatformDisplayEXT = nullptr;
+        }
+    }
+
+    // Check the ANGLE support the system has
+    nsCOMPtr<nsIGfxInfo> gfxInfo = do_GetService("@mozilla.org/gfx/info;1");
+    mIsANGLE = IsExtensionSupported(ANGLE_platform_angle);
+
+    EGLDisplay chosenDisplay = nullptr;
+
+    if (IsExtensionSupported(ANGLE_platform_angle_d3d)) {
+        nsCString accelAngleFailureId;
+        bool accelAngleSupport = IsAccelAngleSupported(gfxInfo, &accelAngleFailureId);
+        bool shouldTryAccel = forceAccel || accelAngleSupport;
+        bool shouldTryWARP = !forceAccel; // Only if ANGLE not supported or fails
+
+        // If WARP preferred, will override ANGLE support
+        if (gfxPrefs::WebGLANGLEForceWARP()) {
+            shouldTryWARP = true;
+            shouldTryAccel = false;
+            if (accelAngleFailureId.IsEmpty()) {
+                accelAngleFailureId = NS_LITERAL_CSTRING("FEATURE_FAILURE_FORCE_WARP");
+            }
+        }
+
+        // Hardware accelerated ANGLE path (supported or force accel)
+        if (shouldTryAccel) {
+            chosenDisplay = GetAndInitDisplayForAccelANGLE(*this, out_failureId);
+        }
+
+        // Report the acceleration status to telemetry
+        if (!chosenDisplay) {
+            if (accelAngleFailureId.IsEmpty()) {
+                Telemetry::Accumulate(Telemetry::CANVAS_WEBGL_ACCL_FAILURE_ID,
+                                      NS_LITERAL_CSTRING("FEATURE_FAILURE_ACCL_ANGLE_UNKNOWN"));
+            } else {
+                Telemetry::Accumulate(Telemetry::CANVAS_WEBGL_ACCL_FAILURE_ID,
+                                      accelAngleFailureId);
+            }
+        } else {
+            Telemetry::Accumulate(Telemetry::CANVAS_WEBGL_ACCL_FAILURE_ID,
+                                  NS_LITERAL_CSTRING("SUCCESS"));
+        }
+
+        // Fallback to a WARP display if ANGLE fails, or if WARP is forced
+        if (!chosenDisplay && shouldTryWARP) {
+            chosenDisplay = GetAndInitWARPDisplay(*this, EGL_DEFAULT_DISPLAY);
+            if (!chosenDisplay) {
+                if (out_failureId->IsEmpty()) {
+                    *out_failureId = NS_LITERAL_CSTRING("FEATURE_FAILURE_WARP_FALLBACK");
+                }
+                NS_ERROR("Fallback WARP context failed to initialize.");
+                return false;
+            }
+            mIsWARP = true;
+        }
+    } else {
+        chosenDisplay = GetAndInitDisplay(*this, EGL_DEFAULT_DISPLAY);
+    }
+
+    if (!chosenDisplay) {
+        if (out_failureId->IsEmpty()) {
+            *out_failureId = NS_LITERAL_CSTRING("FEATURE_FAILURE_NO_DISPLAY");
+        }
+        NS_WARNING("Failed to initialize a display.");
+        return false;
+    }
+    mEGLDisplay = chosenDisplay;
+
+    InitDisplayExtensions();
+
+    ////////////////////////////////////
+    // Alright, load display exts.
+
+    if (IsExtensionSupported(KHR_lock_surface)) {
+        GLLibraryLoader::SymLoadStruct lockSymbols[] = {
+            { (PRFuncPtr*) &mSymbols.fLockSurface,   { "eglLockSurfaceKHR",   nullptr } },
+            { (PRFuncPtr*) &mSymbols.fUnlockSurface, { "eglUnlockSurfaceKHR", nullptr } },
+            { nullptr, { nullptr } }
+        };
+
+        bool success = GLLibraryLoader::LoadSymbols(mEGLLibrary,
+                                                    &lockSymbols[0],
+                                                    lookupFunction);
+        if (!success) {
+            NS_ERROR("EGL supports KHR_lock_surface without exposing its functions!");
+
+            MarkExtensionUnsupported(KHR_lock_surface);
+
+            mSymbols.fLockSurface = nullptr;
+            mSymbols.fUnlockSurface = nullptr;
+        }
+    }
+
+    if (IsExtensionSupported(ANGLE_surface_d3d_texture_2d_share_handle)) {
+        GLLibraryLoader::SymLoadStruct d3dSymbols[] = {
+            { (PRFuncPtr*) &mSymbols.fQuerySurfacePointerANGLE, { "eglQuerySurfacePointerANGLE", nullptr } },
+            { nullptr, { nullptr } }
+        };
+
+        bool success = GLLibraryLoader::LoadSymbols(mEGLLibrary,
+                                                    &d3dSymbols[0],
+                                                    lookupFunction);
+        if (!success) {
+            NS_ERROR("EGL supports ANGLE_surface_d3d_texture_2d_share_handle without exposing its functions!");
+
+            MarkExtensionUnsupported(ANGLE_surface_d3d_texture_2d_share_handle);
+
+            mSymbols.fQuerySurfacePointerANGLE = nullptr;
+        }
+    }
+
+    if (IsExtensionSupported(KHR_fence_sync)) {
+        GLLibraryLoader::SymLoadStruct syncSymbols[] = {
+            { (PRFuncPtr*) &mSymbols.fCreateSync,     { "eglCreateSyncKHR",     nullptr } },
+            { (PRFuncPtr*) &mSymbols.fDestroySync,    { "eglDestroySyncKHR",    nullptr } },
+            { (PRFuncPtr*) &mSymbols.fClientWaitSync, { "eglClientWaitSyncKHR", nullptr } },
+            { (PRFuncPtr*) &mSymbols.fGetSyncAttrib,  { "eglGetSyncAttribKHR",  nullptr } },
+            { nullptr, { nullptr } }
+        };
+
+        bool success = GLLibraryLoader::LoadSymbols(mEGLLibrary,
+                                                    &syncSymbols[0],
+                                                    lookupFunction);
+        if (!success) {
+            NS_ERROR("EGL supports KHR_fence_sync without exposing its functions!");
+
+            MarkExtensionUnsupported(KHR_fence_sync);
+
+            mSymbols.fCreateSync = nullptr;
+            mSymbols.fDestroySync = nullptr;
+            mSymbols.fClientWaitSync = nullptr;
+            mSymbols.fGetSyncAttrib = nullptr;
+        }
+    }
+
+    if (IsExtensionSupported(KHR_image) || IsExtensionSupported(KHR_image_base)) {
+        GLLibraryLoader::SymLoadStruct imageSymbols[] = {
+            { (PRFuncPtr*) &mSymbols.fCreateImage,  { "eglCreateImageKHR",  nullptr } },
+            { (PRFuncPtr*) &mSymbols.fDestroyImage, { "eglDestroyImageKHR", nullptr } },
+            { nullptr, { nullptr } }
+        };
+
+        bool success = GLLibraryLoader::LoadSymbols(mEGLLibrary,
+                                                    &imageSymbols[0],
+                                                    lookupFunction);
+        if (!success) {
+            NS_ERROR("EGL supports KHR_image(_base) without exposing its functions!");
+
+            MarkExtensionUnsupported(KHR_image);
+            MarkExtensionUnsupported(KHR_image_base);
+            MarkExtensionUnsupported(KHR_image_pixmap);
+
+            mSymbols.fCreateImage = nullptr;
+            mSymbols.fDestroyImage = nullptr;
+        }
+    } else {
+        MarkExtensionUnsupported(KHR_image_pixmap);
+    }
+
+    if (IsExtensionSupported(ANDROID_native_fence_sync)) {
+        GLLibraryLoader::SymLoadStruct nativeFenceSymbols[] = {
+            { (PRFuncPtr*) &mSymbols.fDupNativeFenceFDANDROID, { "eglDupNativeFenceFDANDROID", nullptr } },
+            { nullptr, { nullptr } }
+        };
+
+        bool success = GLLibraryLoader::LoadSymbols(mEGLLibrary,
+                                                    &nativeFenceSymbols[0],
+                                                    lookupFunction);
+        if (!success) {
+            NS_ERROR("EGL supports ANDROID_native_fence_sync without exposing its functions!");
+
+            MarkExtensionUnsupported(ANDROID_native_fence_sync);
+
+            mSymbols.fDupNativeFenceFDANDROID = nullptr;
+        }
+    }
+
+    mInitialized = true;
+    reporter.SetSuccessful();
+    return true;
+}
+
+template<size_t N>
+static void
+MarkExtensions(const char* rawExtString, bool shouldDumpExts, const char* extType,
+               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, sEGLExtensionNames, out);
+}
+
+void
+GLLibraryEGL::InitClientExtensions()
+{
+    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 client extensions.\n");
+        }
+        return;
+    }
+
+    MarkExtensions(rawExtString, shouldDumpExts, "client", &mAvailableExtensions);
+}
+
+void
+GLLibraryEGL::InitDisplayExtensions()
+{
+    MOZ_ASSERT(mEGLDisplay);
+
+    const bool shouldDumpExts = GLContext::ShouldDumpExts();
+
+    const auto rawExtString = (const char*)fQueryString(mEGLDisplay,
+                                                        LOCAL_EGL_EXTENSIONS);
+    if (!rawExtString) {
+        NS_WARNING("Failed to query EGL display extensions!.");
+        return;
+    }
+
+    MarkExtensions(rawExtString, shouldDumpExts, "display", &mAvailableExtensions);
+}
+
+void
+GLLibraryEGL::DumpEGLConfig(EGLConfig cfg)
+{
+    int attrval;
+    int err;
+
+#define ATTR(_x) do {                                                   \
+        fGetConfigAttrib(mEGLDisplay, cfg, LOCAL_EGL_##_x, &attrval);  \
+        if ((err = fGetError()) != 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
+GLLibraryEGL::DumpEGLConfigs()
+{
+    int nc = 0;
+    fGetConfigs(mEGLDisplay, nullptr, 0, &nc);
+    EGLConfig* ec = new EGLConfig[nc];
+    fGetConfigs(mEGLDisplay, ec, nc, &nc);
+
+    for (int i = 0; i < nc; ++i) {
+        printf_stderr("========= EGL Config %d ========\n", i);
+        DumpEGLConfig(ec[i]);
+    }
+
+    delete [] ec;
+}
+
+#ifdef DEBUG
+static bool
+ShouldTrace()
+{
+    static bool ret = gfxEnv::GlDebugVerbose();
+    return ret;
+}
+
+/*static*/ void
+GLLibraryEGL::BeforeGLCall(const char* glFunction)
+{
+    if (ShouldTrace()) {
+        printf_stderr("[egl] > %s\n", glFunction);
+    }
+}
+
+/*static*/ void
+GLLibraryEGL::AfterGLCall(const char* glFunction)
+{
+    if (ShouldTrace()) {
+        printf_stderr("[egl] < %s\n", glFunction);
+    }
+}
+#endif
+
+} /* namespace gl */
+} /* namespace mozilla */
+