Adding upstream version 115.7.0esr.upstream/115.7.0esr

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

1 files changed, 1970 insertions, 0 deletions

diff --git a/widget/GfxInfoBase.cpp b/widget/GfxInfoBase.cpp
new file mode 100644
index 0000000000..66dd10da8a
--- /dev/null
+++ b/widget/GfxInfoBase.cpp
@@ -0,0 +1,1970 @@
+/* vim: se cin sw=2 ts=2 et : */
+/* -*- Mode: C++; tab-width: 2; 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/. */
+
+#include "mozilla/ArrayUtils.h"
+
+#include "GfxInfoBase.h"
+
+#include <mutex>  // std::call_once
+
+#include "GfxDriverInfo.h"
+#include "js/Array.h"               // JS::GetArrayLength, JS::NewArrayObject
+#include "js/PropertyAndElement.h"  // JS_SetElement, JS_SetProperty
+#include "nsCOMPtr.h"
+#include "nsCOMArray.h"
+#include "nsString.h"
+#include "nsUnicharUtils.h"
+#include "nsVersionComparator.h"
+#include "mozilla/Services.h"
+#include "mozilla/Observer.h"
+#include "nsIObserver.h"
+#include "nsIObserverService.h"
+#include "nsTArray.h"
+#include "nsXULAppAPI.h"
+#include "nsIXULAppInfo.h"
+#include "mozilla/ClearOnShutdown.h"
+#include "mozilla/Preferences.h"
+#include "mozilla/StaticPrefs_gfx.h"
+#include "mozilla/gfx/2D.h"
+#include "mozilla/gfx/GPUProcessManager.h"
+#include "mozilla/gfx/Logging.h"
+#include "mozilla/gfx/gfxVars.h"
+#include "mozilla/widget/ScreenManager.h"
+#include "mozilla/widget/Screen.h"
+
+#include "jsapi.h"
+
+#include "gfxPlatform.h"
+#include "gfxConfig.h"
+#include "DriverCrashGuard.h"
+
+using namespace mozilla::widget;
+using namespace mozilla;
+using mozilla::MutexAutoLock;
+
+nsTArray<GfxDriverInfo>* GfxInfoBase::sDriverInfo;
+StaticAutoPtr<nsTArray<gfx::GfxInfoFeatureStatus>> GfxInfoBase::sFeatureStatus;
+bool GfxInfoBase::sDriverInfoObserverInitialized;
+bool GfxInfoBase::sShutdownOccurred;
+
+// Call this when setting sFeatureStatus to a non-null pointer to
+// ensure destruction even if the GfxInfo component is never instantiated.
+static void InitFeatureStatus(nsTArray<gfx::GfxInfoFeatureStatus>* aPtr) {
+  static std::once_flag sOnce;
+  std::call_once(sOnce, [] { ClearOnShutdown(&GfxInfoBase::sFeatureStatus); });
+  GfxInfoBase::sFeatureStatus = aPtr;
+}
+
+// Observes for shutdown so that the child GfxDriverInfo list is freed.
+class ShutdownObserver : public nsIObserver {
+  virtual ~ShutdownObserver() = default;
+
+ public:
+  ShutdownObserver() = default;
+
+  NS_DECL_ISUPPORTS
+
+  NS_IMETHOD Observe(nsISupports* subject, const char* aTopic,
+                     const char16_t* aData) override {
+    MOZ_ASSERT(strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID) == 0);
+
+    delete GfxInfoBase::sDriverInfo;
+    GfxInfoBase::sDriverInfo = nullptr;
+
+    for (auto& deviceFamily : GfxDriverInfo::sDeviceFamilies) {
+      delete deviceFamily;
+      deviceFamily = nullptr;
+    }
+
+    for (auto& windowProtocol : GfxDriverInfo::sWindowProtocol) {
+      delete windowProtocol;
+      windowProtocol = nullptr;
+    }
+
+    for (auto& deviceVendor : GfxDriverInfo::sDeviceVendors) {
+      delete deviceVendor;
+      deviceVendor = nullptr;
+    }
+
+    for (auto& driverVendor : GfxDriverInfo::sDriverVendors) {
+      delete driverVendor;
+      driverVendor = nullptr;
+    }
+
+    GfxInfoBase::sShutdownOccurred = true;
+
+    return NS_OK;
+  }
+};
+
+NS_IMPL_ISUPPORTS(ShutdownObserver, nsIObserver)
+
+static void InitGfxDriverInfoShutdownObserver() {
+  if (GfxInfoBase::sDriverInfoObserverInitialized) return;
+
+  GfxInfoBase::sDriverInfoObserverInitialized = true;
+
+  nsCOMPtr<nsIObserverService> observerService = services::GetObserverService();
+  if (!observerService) {
+    NS_WARNING("Could not get observer service!");
+    return;
+  }
+
+  ShutdownObserver* obs = new ShutdownObserver();
+  observerService->AddObserver(obs, NS_XPCOM_SHUTDOWN_OBSERVER_ID, false);
+}
+
+using namespace mozilla::widget;
+using namespace mozilla::gfx;
+using namespace mozilla;
+
+NS_IMPL_ISUPPORTS(GfxInfoBase, nsIGfxInfo, nsIObserver,
+                  nsISupportsWeakReference)
+
+#define BLOCKLIST_PREF_BRANCH "gfx.blacklist."
+#define SUGGESTED_VERSION_PREF BLOCKLIST_PREF_BRANCH "suggested-driver-version"
+
+static const char* GetPrefNameForFeature(int32_t aFeature) {
+  const char* name = nullptr;
+  switch (aFeature) {
+    case nsIGfxInfo::FEATURE_DIRECT2D:
+      name = BLOCKLIST_PREF_BRANCH "direct2d";
+      break;
+    case nsIGfxInfo::FEATURE_DIRECT3D_9_LAYERS:
+      name = BLOCKLIST_PREF_BRANCH "layers.direct3d9";
+      break;
+    case nsIGfxInfo::FEATURE_DIRECT3D_10_LAYERS:
+      name = BLOCKLIST_PREF_BRANCH "layers.direct3d10";
+      break;
+    case nsIGfxInfo::FEATURE_DIRECT3D_10_1_LAYERS:
+      name = BLOCKLIST_PREF_BRANCH "layers.direct3d10-1";
+      break;
+    case nsIGfxInfo::FEATURE_DIRECT3D_11_LAYERS:
+      name = BLOCKLIST_PREF_BRANCH "layers.direct3d11";
+      break;
+    case nsIGfxInfo::FEATURE_DIRECT3D_11_ANGLE:
+      name = BLOCKLIST_PREF_BRANCH "direct3d11angle";
+      break;
+    case nsIGfxInfo::FEATURE_HARDWARE_VIDEO_DECODING:
+      name = BLOCKLIST_PREF_BRANCH "hardwarevideodecoding";
+      break;
+    case nsIGfxInfo::FEATURE_OPENGL_LAYERS:
+      name = BLOCKLIST_PREF_BRANCH "layers.opengl";
+      break;
+    case nsIGfxInfo::FEATURE_WEBGL_OPENGL:
+      name = BLOCKLIST_PREF_BRANCH "webgl.opengl";
+      break;
+    case nsIGfxInfo::FEATURE_WEBGL_ANGLE:
+      name = BLOCKLIST_PREF_BRANCH "webgl.angle";
+      break;
+    case nsIGfxInfo::UNUSED_FEATURE_WEBGL_MSAA:
+      name = BLOCKLIST_PREF_BRANCH "webgl.msaa";
+      break;
+    case nsIGfxInfo::FEATURE_STAGEFRIGHT:
+      name = BLOCKLIST_PREF_BRANCH "stagefright";
+      break;
+    case nsIGfxInfo::FEATURE_WEBRTC_HW_ACCELERATION_H264:
+      name = BLOCKLIST_PREF_BRANCH "webrtc.hw.acceleration.h264";
+      break;
+    case nsIGfxInfo::FEATURE_WEBRTC_HW_ACCELERATION_ENCODE:
+      name = BLOCKLIST_PREF_BRANCH "webrtc.hw.acceleration.encode";
+      break;
+    case nsIGfxInfo::FEATURE_WEBRTC_HW_ACCELERATION_DECODE:
+      name = BLOCKLIST_PREF_BRANCH "webrtc.hw.acceleration.decode";
+      break;
+    case nsIGfxInfo::FEATURE_CANVAS2D_ACCELERATION:
+      name = BLOCKLIST_PREF_BRANCH "canvas2d.acceleration";
+      break;
+    case nsIGfxInfo::FEATURE_DX_INTEROP2:
+      name = BLOCKLIST_PREF_BRANCH "dx.interop2";
+      break;
+    case nsIGfxInfo::FEATURE_GPU_PROCESS:
+      name = BLOCKLIST_PREF_BRANCH "gpu.process";
+      break;
+    case nsIGfxInfo::FEATURE_WEBGL2:
+      name = BLOCKLIST_PREF_BRANCH "webgl2";
+      break;
+    case nsIGfxInfo::FEATURE_D3D11_KEYED_MUTEX:
+      name = BLOCKLIST_PREF_BRANCH "d3d11.keyed.mutex";
+      break;
+    case nsIGfxInfo::FEATURE_WEBRENDER:
+      name = BLOCKLIST_PREF_BRANCH "webrender";
+      break;
+    case nsIGfxInfo::FEATURE_WEBRENDER_COMPOSITOR:
+      name = BLOCKLIST_PREF_BRANCH "webrender.compositor";
+      break;
+    case nsIGfxInfo::FEATURE_DX_NV12:
+      name = BLOCKLIST_PREF_BRANCH "dx.nv12";
+      break;
+    case nsIGfxInfo::FEATURE_DX_P010:
+      name = BLOCKLIST_PREF_BRANCH "dx.p010";
+      break;
+    case nsIGfxInfo::FEATURE_DX_P016:
+      name = BLOCKLIST_PREF_BRANCH "dx.p016";
+      break;
+    case nsIGfxInfo::FEATURE_VP8_HW_DECODE:
+      name = BLOCKLIST_PREF_BRANCH "vp8.hw-decode";
+      break;
+    case nsIGfxInfo::FEATURE_VP9_HW_DECODE:
+      name = BLOCKLIST_PREF_BRANCH "vp9.hw-decode";
+      break;
+    case nsIGfxInfo::FEATURE_GL_SWIZZLE:
+      name = BLOCKLIST_PREF_BRANCH "gl.swizzle";
+      break;
+    case nsIGfxInfo::FEATURE_WEBRENDER_SCISSORED_CACHE_CLEARS:
+      name = BLOCKLIST_PREF_BRANCH "webrender.scissored_cache_clears";
+      break;
+    case nsIGfxInfo::FEATURE_ALLOW_WEBGL_OUT_OF_PROCESS:
+      name = BLOCKLIST_PREF_BRANCH "webgl.allow-oop";
+      break;
+    case nsIGfxInfo::FEATURE_THREADSAFE_GL:
+      name = BLOCKLIST_PREF_BRANCH "gl.threadsafe";
+      break;
+    case nsIGfxInfo::FEATURE_WEBRENDER_OPTIMIZED_SHADERS:
+      name = BLOCKLIST_PREF_BRANCH "webrender.optimized-shaders";
+      break;
+    case nsIGfxInfo::FEATURE_X11_EGL:
+      name = BLOCKLIST_PREF_BRANCH "x11.egl";
+      break;
+    case nsIGfxInfo::FEATURE_DMABUF:
+      name = BLOCKLIST_PREF_BRANCH "dmabuf";
+      break;
+    case nsIGfxInfo::FEATURE_WEBGPU:
+      name = BLOCKLIST_PREF_BRANCH "webgpu";
+      break;
+    case nsIGfxInfo::FEATURE_VIDEO_OVERLAY:
+      name = BLOCKLIST_PREF_BRANCH "video-overlay";
+      break;
+    case nsIGfxInfo::FEATURE_HW_DECODED_VIDEO_ZERO_COPY:
+      name = BLOCKLIST_PREF_BRANCH "hw-video-zero-copy";
+      break;
+    case nsIGfxInfo::FEATURE_WEBRENDER_SHADER_CACHE:
+      name = BLOCKLIST_PREF_BRANCH "webrender.program-binary-disk";
+      break;
+    case nsIGfxInfo::FEATURE_WEBRENDER_PARTIAL_PRESENT:
+      name = BLOCKLIST_PREF_BRANCH "webrender.partial-present";
+      break;
+    case nsIGfxInfo::FEATURE_DMABUF_SURFACE_EXPORT:
+      name = BLOCKLIST_PREF_BRANCH "dmabuf.surface-export";
+      break;
+    case nsIGfxInfo::FEATURE_REUSE_DECODER_DEVICE:
+      name = BLOCKLIST_PREF_BRANCH "reuse-decoder-device";
+      break;
+    case nsIGfxInfo::FEATURE_BACKDROP_FILTER:
+      name = BLOCKLIST_PREF_BRANCH "backdrop.filter";
+      break;
+    case nsIGfxInfo::FEATURE_ACCELERATED_CANVAS2D:
+      name = BLOCKLIST_PREF_BRANCH "accelerated-canvas2d";
+      break;
+    case nsIGfxInfo::FEATURE_H264_HW_DECODE:
+      name = BLOCKLIST_PREF_BRANCH "h264.hw-decode";
+      break;
+    case nsIGfxInfo::FEATURE_AV1_HW_DECODE:
+      name = BLOCKLIST_PREF_BRANCH "av1.hw-decode";
+      break;
+    case nsIGfxInfo::FEATURE_WEBGL_USE_HARDWARE:
+      name = BLOCKLIST_PREF_BRANCH "webgl-use-hardware";
+      break;
+    default:
+      MOZ_ASSERT_UNREACHABLE("Unexpected nsIGfxInfo feature?!");
+      break;
+  }
+
+  return name;
+}
+
+// Returns the value of the pref for the relevant feature in aValue.
+// If the pref doesn't exist, aValue is not touched, and returns false.
+static bool GetPrefValueForFeature(int32_t aFeature, int32_t& aValue,
+                                   nsACString& aFailureId) {
+  const char* prefname = GetPrefNameForFeature(aFeature);
+  if (!prefname) return false;
+
+  aValue = nsIGfxInfo::FEATURE_STATUS_UNKNOWN;
+  if (!NS_SUCCEEDED(Preferences::GetInt(prefname, &aValue))) {
+    return false;
+  }
+
+  if (aValue == nsIGfxInfo::FEATURE_DENIED) {
+    // We should never see the DENIED status with the downloadable blocklist.
+    return false;
+  }
+
+  nsCString failureprefname(prefname);
+  failureprefname += ".failureid";
+  nsAutoCString failureValue;
+  nsresult rv = Preferences::GetCString(failureprefname.get(), failureValue);
+  if (NS_SUCCEEDED(rv)) {
+    aFailureId = failureValue.get();
+  } else {
+    aFailureId = "FEATURE_FAILURE_BLOCKLIST_PREF";
+  }
+
+  return true;
+}
+
+static void SetPrefValueForFeature(int32_t aFeature, int32_t aValue,
+                                   const nsACString& aFailureId) {
+  const char* prefname = GetPrefNameForFeature(aFeature);
+  if (!prefname) return;
+  if (XRE_IsParentProcess()) {
+    GfxInfoBase::sFeatureStatus = nullptr;
+  }
+
+  Preferences::SetInt(prefname, aValue);
+  if (!aFailureId.IsEmpty()) {
+    nsAutoCString failureprefname(prefname);
+    failureprefname += ".failureid";
+    Preferences::SetCString(failureprefname.get(), aFailureId);
+  }
+}
+
+static void RemovePrefForFeature(int32_t aFeature) {
+  const char* prefname = GetPrefNameForFeature(aFeature);
+  if (!prefname) return;
+
+  if (XRE_IsParentProcess()) {
+    GfxInfoBase::sFeatureStatus = nullptr;
+  }
+  Preferences::ClearUser(prefname);
+}
+
+static bool GetPrefValueForDriverVersion(nsCString& aVersion) {
+  return NS_SUCCEEDED(
+      Preferences::GetCString(SUGGESTED_VERSION_PREF, aVersion));
+}
+
+static void SetPrefValueForDriverVersion(const nsAString& aVersion) {
+  Preferences::SetString(SUGGESTED_VERSION_PREF, aVersion);
+}
+
+static void RemovePrefForDriverVersion() {
+  Preferences::ClearUser(SUGGESTED_VERSION_PREF);
+}
+
+static OperatingSystem BlocklistOSToOperatingSystem(const nsAString& os) {
+  if (os.EqualsLiteral("WINNT 6.1")) {
+    return OperatingSystem::Windows7;
+  }
+  if (os.EqualsLiteral("WINNT 6.2")) {
+    return OperatingSystem::Windows8;
+  }
+  if (os.EqualsLiteral("WINNT 6.3")) {
+    return OperatingSystem::Windows8_1;
+  }
+  if (os.EqualsLiteral("WINNT 10.0")) {
+    return OperatingSystem::Windows10;
+  }
+  if (os.EqualsLiteral("Linux")) {
+    return OperatingSystem::Linux;
+  }
+  if (os.EqualsLiteral("Darwin 9")) {
+    return OperatingSystem::OSX10_5;
+  }
+  if (os.EqualsLiteral("Darwin 10")) {
+    return OperatingSystem::OSX10_6;
+  }
+  if (os.EqualsLiteral("Darwin 11")) {
+    return OperatingSystem::OSX10_7;
+  }
+  if (os.EqualsLiteral("Darwin 12")) {
+    return OperatingSystem::OSX10_8;
+  }
+  if (os.EqualsLiteral("Darwin 13")) {
+    return OperatingSystem::OSX10_9;
+  }
+  if (os.EqualsLiteral("Darwin 14")) {
+    return OperatingSystem::OSX10_10;
+  }
+  if (os.EqualsLiteral("Darwin 15")) {
+    return OperatingSystem::OSX10_11;
+  }
+  if (os.EqualsLiteral("Darwin 16")) {
+    return OperatingSystem::OSX10_12;
+  }
+  if (os.EqualsLiteral("Darwin 17")) {
+    return OperatingSystem::OSX10_13;
+  }
+  if (os.EqualsLiteral("Darwin 18")) {
+    return OperatingSystem::OSX10_14;
+  }
+  if (os.EqualsLiteral("Darwin 19")) {
+    return OperatingSystem::OSX10_15;
+  }
+  if (os.EqualsLiteral("Darwin 20")) {
+    return OperatingSystem::OSX11_0;
+  }
+  if (os.EqualsLiteral("Android")) {
+    return OperatingSystem::Android;
+    // For historical reasons, "All" in blocklist means "All Windows"
+  }
+  if (os.EqualsLiteral("All")) {
+    return OperatingSystem::Windows;
+  }
+  if (os.EqualsLiteral("Darwin")) {
+    return OperatingSystem::OSX;
+  }
+
+  return OperatingSystem::Unknown;
+}
+
+static GfxDeviceFamily* BlocklistDevicesToDeviceFamily(
+    nsTArray<nsCString>& devices) {
+  if (devices.Length() == 0) return nullptr;
+
+  // For each device, get its device ID, and return a freshly-allocated
+  // GfxDeviceFamily with the contents of that array.
+  GfxDeviceFamily* deviceIds = new GfxDeviceFamily;
+
+  for (uint32_t i = 0; i < devices.Length(); ++i) {
+    // We make sure we don't add any "empty" device entries to the array, so
+    // we don't need to check if devices[i] is empty.
+    deviceIds->Append(NS_ConvertUTF8toUTF16(devices[i]));
+  }
+
+  return deviceIds;
+}
+
+static int32_t BlocklistFeatureToGfxFeature(const nsAString& aFeature) {
+  MOZ_ASSERT(!aFeature.IsEmpty());
+  if (aFeature.EqualsLiteral("DIRECT2D")) {
+    return nsIGfxInfo::FEATURE_DIRECT2D;
+  }
+  if (aFeature.EqualsLiteral("DIRECT3D_9_LAYERS")) {
+    return nsIGfxInfo::FEATURE_DIRECT3D_9_LAYERS;
+  }
+  if (aFeature.EqualsLiteral("DIRECT3D_10_LAYERS")) {
+    return nsIGfxInfo::FEATURE_DIRECT3D_10_LAYERS;
+  }
+  if (aFeature.EqualsLiteral("DIRECT3D_10_1_LAYERS")) {
+    return nsIGfxInfo::FEATURE_DIRECT3D_10_1_LAYERS;
+  }
+  if (aFeature.EqualsLiteral("DIRECT3D_11_LAYERS")) {
+    return nsIGfxInfo::FEATURE_DIRECT3D_11_LAYERS;
+  }
+  if (aFeature.EqualsLiteral("DIRECT3D_11_ANGLE")) {
+    return nsIGfxInfo::FEATURE_DIRECT3D_11_ANGLE;
+  }
+  if (aFeature.EqualsLiteral("HARDWARE_VIDEO_DECODING")) {
+    return nsIGfxInfo::FEATURE_HARDWARE_VIDEO_DECODING;
+  }
+  if (aFeature.EqualsLiteral("OPENGL_LAYERS")) {
+    return nsIGfxInfo::FEATURE_OPENGL_LAYERS;
+  }
+  if (aFeature.EqualsLiteral("WEBGL_OPENGL")) {
+    return nsIGfxInfo::FEATURE_WEBGL_OPENGL;
+  }
+  if (aFeature.EqualsLiteral("WEBGL_ANGLE")) {
+    return nsIGfxInfo::FEATURE_WEBGL_ANGLE;
+  }
+  if (aFeature.EqualsLiteral("WEBGL_MSAA")) {
+    return nsIGfxInfo::UNUSED_FEATURE_WEBGL_MSAA;
+  }
+  if (aFeature.EqualsLiteral("STAGEFRIGHT")) {
+    return nsIGfxInfo::FEATURE_STAGEFRIGHT;
+  }
+  if (aFeature.EqualsLiteral("WEBRTC_HW_ACCELERATION_ENCODE")) {
+    return nsIGfxInfo::FEATURE_WEBRTC_HW_ACCELERATION_ENCODE;
+  }
+  if (aFeature.EqualsLiteral("WEBRTC_HW_ACCELERATION_DECODE")) {
+    return nsIGfxInfo::FEATURE_WEBRTC_HW_ACCELERATION_DECODE;
+  }
+  if (aFeature.EqualsLiteral("WEBRTC_HW_ACCELERATION_H264")) {
+    return nsIGfxInfo::FEATURE_WEBRTC_HW_ACCELERATION_H264;
+  }
+  if (aFeature.EqualsLiteral("CANVAS2D_ACCELERATION")) {
+    return nsIGfxInfo::FEATURE_CANVAS2D_ACCELERATION;
+  }
+  if (aFeature.EqualsLiteral("DX_INTEROP2")) {
+    return nsIGfxInfo::FEATURE_DX_INTEROP2;
+  }
+  if (aFeature.EqualsLiteral("GPU_PROCESS")) {
+    return nsIGfxInfo::FEATURE_GPU_PROCESS;
+  }
+  if (aFeature.EqualsLiteral("WEBGL2")) {
+    return nsIGfxInfo::FEATURE_WEBGL2;
+  }
+  if (aFeature.EqualsLiteral("D3D11_KEYED_MUTEX")) {
+    return nsIGfxInfo::FEATURE_D3D11_KEYED_MUTEX;
+  }
+  if (aFeature.EqualsLiteral("WEBRENDER")) {
+    return nsIGfxInfo::FEATURE_WEBRENDER;
+  }
+  if (aFeature.EqualsLiteral("WEBRENDER_COMPOSITOR")) {
+    return nsIGfxInfo::FEATURE_WEBRENDER_COMPOSITOR;
+  }
+  if (aFeature.EqualsLiteral("DX_NV12")) {
+    return nsIGfxInfo::FEATURE_DX_NV12;
+  }
+  if (aFeature.EqualsLiteral("VP8_HW_DECODE")) {
+    return nsIGfxInfo::FEATURE_VP8_HW_DECODE;
+  }
+  if (aFeature.EqualsLiteral("VP9_HW_DECODE")) {
+    return nsIGfxInfo::FEATURE_VP9_HW_DECODE;
+  }
+  if (aFeature.EqualsLiteral("GL_SWIZZLE")) {
+    return nsIGfxInfo::FEATURE_GL_SWIZZLE;
+  }
+  if (aFeature.EqualsLiteral("WEBRENDER_SCISSORED_CACHE_CLEARS")) {
+    return nsIGfxInfo::FEATURE_WEBRENDER_SCISSORED_CACHE_CLEARS;
+  }
+  if (aFeature.EqualsLiteral("ALLOW_WEBGL_OUT_OF_PROCESS")) {
+    return nsIGfxInfo::FEATURE_ALLOW_WEBGL_OUT_OF_PROCESS;
+  }
+  if (aFeature.EqualsLiteral("THREADSAFE_GL")) {
+    return nsIGfxInfo::FEATURE_THREADSAFE_GL;
+  }
+  if (aFeature.EqualsLiteral("X11_EGL")) {
+    return nsIGfxInfo::FEATURE_X11_EGL;
+  }
+  if (aFeature.EqualsLiteral("DMABUF")) {
+    return nsIGfxInfo::FEATURE_DMABUF;
+  }
+  if (aFeature.EqualsLiteral("WEBGPU")) {
+    return nsIGfxInfo::FEATURE_WEBGPU;
+  }
+  if (aFeature.EqualsLiteral("VIDEO_OVERLAY")) {
+    return nsIGfxInfo::FEATURE_VIDEO_OVERLAY;
+  }
+  if (aFeature.EqualsLiteral("HW_DECODED_VIDEO_ZERO_COPY")) {
+    return nsIGfxInfo::FEATURE_HW_DECODED_VIDEO_ZERO_COPY;
+  }
+  if (aFeature.EqualsLiteral("REUSE_DECODER_DEVICE")) {
+    return nsIGfxInfo::FEATURE_REUSE_DECODER_DEVICE;
+  }
+  if (aFeature.EqualsLiteral("WEBRENDER_PARTIAL_PRESENT")) {
+    return nsIGfxInfo::FEATURE_WEBRENDER_PARTIAL_PRESENT;
+  }
+  if (aFeature.EqualsLiteral("BACKDROP_FILTER")) {
+    return nsIGfxInfo::FEATURE_BACKDROP_FILTER;
+  }
+  if (aFeature.EqualsLiteral("ACCELERATED_CANVAS2D")) {
+    return nsIGfxInfo::FEATURE_ACCELERATED_CANVAS2D;
+  }
+
+  // If we don't recognize the feature, it may be new, and something
+  // this version doesn't understand.  So, nothing to do.  This is
+  // different from feature not being specified at all, in which case
+  // this method should not get called and we should continue with the
+  // "all features" blocklisting.
+  return -1;
+}
+
+static int32_t BlocklistFeatureStatusToGfxFeatureStatus(
+    const nsAString& aStatus) {
+  if (aStatus.EqualsLiteral("STATUS_OK")) {
+    return nsIGfxInfo::FEATURE_STATUS_OK;
+  }
+  if (aStatus.EqualsLiteral("BLOCKED_DRIVER_VERSION")) {
+    return nsIGfxInfo::FEATURE_BLOCKED_DRIVER_VERSION;
+  }
+  if (aStatus.EqualsLiteral("BLOCKED_DEVICE")) {
+    return nsIGfxInfo::FEATURE_BLOCKED_DEVICE;
+  }
+  if (aStatus.EqualsLiteral("DISCOURAGED")) {
+    return nsIGfxInfo::FEATURE_DISCOURAGED;
+  }
+  if (aStatus.EqualsLiteral("BLOCKED_OS_VERSION")) {
+    return nsIGfxInfo::FEATURE_BLOCKED_OS_VERSION;
+  }
+  if (aStatus.EqualsLiteral("DENIED")) {
+    return nsIGfxInfo::FEATURE_DENIED;
+  }
+  if (aStatus.EqualsLiteral("ALLOW_QUALIFIED")) {
+    return nsIGfxInfo::FEATURE_ALLOW_QUALIFIED;
+  }
+  if (aStatus.EqualsLiteral("ALLOW_ALWAYS")) {
+    return nsIGfxInfo::FEATURE_ALLOW_ALWAYS;
+  }
+
+  // Do not allow it to set STATUS_UNKNOWN.  Also, we are not
+  // expecting the "mismatch" status showing up here.
+
+  return nsIGfxInfo::FEATURE_STATUS_OK;
+}
+
+static VersionComparisonOp BlocklistComparatorToComparisonOp(
+    const nsAString& op) {
+  if (op.EqualsLiteral("LESS_THAN")) {
+    return DRIVER_LESS_THAN;
+  }
+  if (op.EqualsLiteral("BUILD_ID_LESS_THAN")) {
+    return DRIVER_BUILD_ID_LESS_THAN;
+  }
+  if (op.EqualsLiteral("LESS_THAN_OR_EQUAL")) {
+    return DRIVER_LESS_THAN_OR_EQUAL;
+  }
+  if (op.EqualsLiteral("BUILD_ID_LESS_THAN_OR_EQUAL")) {
+    return DRIVER_BUILD_ID_LESS_THAN_OR_EQUAL;
+  }
+  if (op.EqualsLiteral("GREATER_THAN")) {
+    return DRIVER_GREATER_THAN;
+  }
+  if (op.EqualsLiteral("GREATER_THAN_OR_EQUAL")) {
+    return DRIVER_GREATER_THAN_OR_EQUAL;
+  }
+  if (op.EqualsLiteral("EQUAL")) {
+    return DRIVER_EQUAL;
+  }
+  if (op.EqualsLiteral("NOT_EQUAL")) {
+    return DRIVER_NOT_EQUAL;
+  }
+  if (op.EqualsLiteral("BETWEEN_EXCLUSIVE")) {
+    return DRIVER_BETWEEN_EXCLUSIVE;
+  }
+  if (op.EqualsLiteral("BETWEEN_INCLUSIVE")) {
+    return DRIVER_BETWEEN_INCLUSIVE;
+  }
+  if (op.EqualsLiteral("BETWEEN_INCLUSIVE_START")) {
+    return DRIVER_BETWEEN_INCLUSIVE_START;
+  }
+
+  return DRIVER_COMPARISON_IGNORED;
+}
+
+/*
+  Deserialize Blocklist entries from string.
+  e.g:
+  os:WINNT 6.0\tvendor:0x8086\tdevices:0x2582,0x2782\tfeature:DIRECT3D_10_LAYERS\tfeatureStatus:BLOCKED_DRIVER_VERSION\tdriverVersion:8.52.322.2202\tdriverVersionComparator:LESS_THAN_OR_EQUAL
+*/
+static bool BlocklistEntryToDriverInfo(const nsACString& aBlocklistEntry,
+                                       GfxDriverInfo& aDriverInfo) {
+  // If we get an application version to be zero, something is not working
+  // and we are not going to bother checking the blocklist versions.
+  // See TestGfxWidgets.cpp for how version comparison works.
+  // <versionRange minVersion="42.0a1" maxVersion="45.0"></versionRange>
+  static mozilla::Version zeroV("0");
+  static mozilla::Version appV(GfxInfoBase::GetApplicationVersion().get());
+  if (appV <= zeroV) {
+    gfxCriticalErrorOnce(gfxCriticalError::DefaultOptions(false))
+        << "Invalid application version "
+        << GfxInfoBase::GetApplicationVersion().get();
+  }
+
+  aDriverInfo.mRuleId = "FEATURE_FAILURE_DL_BLOCKLIST_NO_ID"_ns;
+
+  for (const auto& keyValue : aBlocklistEntry.Split('\t')) {
+    nsTArray<nsCString> splitted;
+    ParseString(keyValue, ':', splitted);
+    if (splitted.Length() != 2) {
+      // If we don't recognize the input data, we do not want to proceed.
+      gfxCriticalErrorOnce(CriticalLog::DefaultOptions(false))
+          << "Unrecognized data " << nsCString(keyValue).get();
+      return false;
+    }
+    const nsCString& key = splitted[0];
+    const nsCString& value = splitted[1];
+    NS_ConvertUTF8toUTF16 dataValue(value);
+
+    if (value.Length() == 0) {
+      // Safety check for empty values.
+      gfxCriticalErrorOnce(CriticalLog::DefaultOptions(false))
+          << "Empty value for " << key.get();
+      return false;
+    }
+
+    if (key.EqualsLiteral("blockID")) {
+      nsCString blockIdStr = "FEATURE_FAILURE_DL_BLOCKLIST_"_ns + value;
+      aDriverInfo.mRuleId = blockIdStr.get();
+    } else if (key.EqualsLiteral("os")) {
+      aDriverInfo.mOperatingSystem = BlocklistOSToOperatingSystem(dataValue);
+    } else if (key.EqualsLiteral("osversion")) {
+      aDriverInfo.mOperatingSystemVersion = strtoul(value.get(), nullptr, 10);
+    } else if (key.EqualsLiteral("windowProtocol")) {
+      aDriverInfo.mWindowProtocol = dataValue;
+    } else if (key.EqualsLiteral("vendor")) {
+      aDriverInfo.mAdapterVendor = dataValue;
+    } else if (key.EqualsLiteral("driverVendor")) {
+      aDriverInfo.mDriverVendor = dataValue;
+    } else if (key.EqualsLiteral("feature")) {
+      aDriverInfo.mFeature = BlocklistFeatureToGfxFeature(dataValue);
+      if (aDriverInfo.mFeature < 0) {
+        // If we don't recognize the feature, we do not want to proceed.
+        gfxWarning() << "Unrecognized feature " << value.get();
+        return false;
+      }
+    } else if (key.EqualsLiteral("featureStatus")) {
+      aDriverInfo.mFeatureStatus =
+          BlocklistFeatureStatusToGfxFeatureStatus(dataValue);
+    } else if (key.EqualsLiteral("driverVersion")) {
+      uint64_t version;
+      if (ParseDriverVersion(dataValue, &version))
+        aDriverInfo.mDriverVersion = version;
+    } else if (key.EqualsLiteral("driverVersionMax")) {
+      uint64_t version;
+      if (ParseDriverVersion(dataValue, &version))
+        aDriverInfo.mDriverVersionMax = version;
+    } else if (key.EqualsLiteral("driverVersionComparator")) {
+      aDriverInfo.mComparisonOp = BlocklistComparatorToComparisonOp(dataValue);
+    } else if (key.EqualsLiteral("model")) {
+      aDriverInfo.mModel = dataValue;
+    } else if (key.EqualsLiteral("product")) {
+      aDriverInfo.mProduct = dataValue;
+    } else if (key.EqualsLiteral("manufacturer")) {
+      aDriverInfo.mManufacturer = dataValue;
+    } else if (key.EqualsLiteral("hardware")) {
+      aDriverInfo.mHardware = dataValue;
+    } else if (key.EqualsLiteral("versionRange")) {
+      nsTArray<nsCString> versionRange;
+      ParseString(value, ',', versionRange);
+      if (versionRange.Length() != 2) {
+        gfxCriticalErrorOnce(CriticalLog::DefaultOptions(false))
+            << "Unrecognized versionRange " << value.get();
+        return false;
+      }
+      const nsCString& minValue = versionRange[0];
+      const nsCString& maxValue = versionRange[1];
+
+      mozilla::Version minV(minValue.get());
+      mozilla::Version maxV(maxValue.get());
+
+      if (minV > zeroV && !(appV >= minV)) {
+        // The version of the application is less than the minimal version
+        // this blocklist entry applies to, so we can just ignore it by
+        // returning false and letting the caller deal with it.
+        return false;
+      }
+      if (maxV > zeroV && !(appV <= maxV)) {
+        // The version of the application is more than the maximal version
+        // this blocklist entry applies to, so we can just ignore it by
+        // returning false and letting the caller deal with it.
+        return false;
+      }
+    } else if (key.EqualsLiteral("devices")) {
+      nsTArray<nsCString> devices;
+      ParseString(value, ',', devices);
+      GfxDeviceFamily* deviceIds = BlocklistDevicesToDeviceFamily(devices);
+      if (deviceIds) {
+        // Get GfxDriverInfo to adopt the devices array we created.
+        aDriverInfo.mDeleteDevices = true;
+        aDriverInfo.mDevices = deviceIds;
+      }
+    }
+    // We explicitly ignore unknown elements.
+  }
+
+  return true;
+}
+
+NS_IMETHODIMP
+GfxInfoBase::Observe(nsISupports* aSubject, const char* aTopic,
+                     const char16_t* aData) {
+  if (strcmp(aTopic, "blocklist-data-gfxItems") == 0) {
+    nsTArray<GfxDriverInfo> driverInfo;
+    NS_ConvertUTF16toUTF8 utf8Data(aData);
+
+    for (const auto& blocklistEntry : utf8Data.Split('\n')) {
+      GfxDriverInfo di;
+      if (BlocklistEntryToDriverInfo(blocklistEntry, di)) {
+        // XXX Changing this to driverInfo.AppendElement(di) causes leaks.
+        // Probably some non-standard semantics of the copy/move operations?
+        *driverInfo.AppendElement() = di;
+        // Prevent di falling out of scope from destroying the devices.
+        di.mDeleteDevices = false;
+      } else {
+        driverInfo.AppendElement();
+      }
+    }
+
+    EvaluateDownloadedBlocklist(driverInfo);
+  }
+
+  return NS_OK;
+}
+
+GfxInfoBase::GfxInfoBase() : mScreenPixels(INT64_MAX), mMutex("GfxInfoBase") {}
+
+GfxInfoBase::~GfxInfoBase() = default;
+
+nsresult GfxInfoBase::Init() {
+  InitGfxDriverInfoShutdownObserver();
+
+  nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
+  if (os) {
+    os->AddObserver(this, "blocklist-data-gfxItems", true);
+  }
+
+  return NS_OK;
+}
+
+void GfxInfoBase::GetData() {
+  if (mScreenPixels != INT64_MAX) {
+    // Already initialized.
+    return;
+  }
+
+  ScreenManager::GetSingleton().GetTotalScreenPixels(&mScreenPixels);
+}
+
+NS_IMETHODIMP
+GfxInfoBase::GetFeatureStatus(int32_t aFeature, nsACString& aFailureId,
+                              int32_t* aStatus) {
+  // Ignore the gfx.blocklist.all pref on release and beta.
+#if defined(RELEASE_OR_BETA)
+  int32_t blocklistAll = 0;
+#else
+  int32_t blocklistAll = StaticPrefs::gfx_blocklist_all_AtStartup();
+#endif
+  if (blocklistAll > 0) {
+    gfxCriticalErrorOnce(gfxCriticalError::DefaultOptions(false))
+        << "Forcing blocklisting all features";
+    *aStatus = FEATURE_BLOCKED_DEVICE;
+    aFailureId = "FEATURE_FAILURE_BLOCK_ALL";
+    return NS_OK;
+  }
+
+  if (blocklistAll < 0) {
+    gfxCriticalErrorOnce(gfxCriticalError::DefaultOptions(false))
+        << "Ignoring any feature blocklisting.";
+    *aStatus = FEATURE_STATUS_OK;
+    return NS_OK;
+  }
+
+  // This is how we evaluate the downloadable blocklist. If there is no pref,
+  // then we will fallback to checking the static blocklist.
+  if (GetPrefValueForFeature(aFeature, *aStatus, aFailureId)) {
+    return NS_OK;
+  }
+
+  if (XRE_IsContentProcess() || XRE_IsGPUProcess()) {
+    // Use the cached data received from the parent process.
+    MOZ_ASSERT(sFeatureStatus);
+    bool success = false;
+    for (const auto& fs : *sFeatureStatus) {
+      if (fs.feature() == aFeature) {
+        aFailureId = fs.failureId();
+        *aStatus = fs.status();
+        success = true;
+        break;
+      }
+    }
+    return success ? NS_OK : NS_ERROR_FAILURE;
+  }
+
+  nsString version;
+  nsTArray<GfxDriverInfo> driverInfo;
+  nsresult rv =
+      GetFeatureStatusImpl(aFeature, aStatus, version, driverInfo, aFailureId);
+  return rv;
+}
+
+nsTArray<gfx::GfxInfoFeatureStatus> GfxInfoBase::GetAllFeatures() {
+  MOZ_RELEASE_ASSERT(XRE_IsParentProcess());
+  if (!sFeatureStatus) {
+    InitFeatureStatus(new nsTArray<gfx::GfxInfoFeatureStatus>());
+    for (int32_t i = 1; i <= nsIGfxInfo::FEATURE_MAX_VALUE; ++i) {
+      int32_t status = 0;
+      nsAutoCString failureId;
+      GetFeatureStatus(i, failureId, &status);
+      gfx::GfxInfoFeatureStatus gfxFeatureStatus;
+      gfxFeatureStatus.feature() = i;
+      gfxFeatureStatus.status() = status;
+      gfxFeatureStatus.failureId() = failureId;
+      sFeatureStatus->AppendElement(gfxFeatureStatus);
+    }
+  }
+
+  nsTArray<gfx::GfxInfoFeatureStatus> features;
+  for (const auto& status : *sFeatureStatus) {
+    gfx::GfxInfoFeatureStatus copy = status;
+    features.AppendElement(copy);
+  }
+  return features;
+}
+
+inline bool MatchingAllowStatus(int32_t aStatus) {
+  switch (aStatus) {
+    case nsIGfxInfo::FEATURE_ALLOW_ALWAYS:
+    case nsIGfxInfo::FEATURE_ALLOW_QUALIFIED:
+      return true;
+    default:
+      return false;
+  }
+}
+
+// Matching OS go somewhat beyond the simple equality check because of the
+// "All Windows" and "All OS X" variations.
+//
+// aBlockedOS is describing the system(s) we are trying to block.
+// aSystemOS is describing the system we are running on.
+//
+// aSystemOS should not be "Windows" or "OSX" - it should be set to
+// a particular version instead.
+// However, it is valid for aBlockedOS to be one of those generic values,
+// as we could be blocking all of the versions.
+inline bool MatchingOperatingSystems(OperatingSystem aBlockedOS,
+                                     OperatingSystem aSystemOS,
+                                     uint32_t aSystemOSBuild) {
+  MOZ_ASSERT(aSystemOS != OperatingSystem::Windows &&
+             aSystemOS != OperatingSystem::OSX);
+
+  // If the block entry OS is unknown, it doesn't match
+  if (aBlockedOS == OperatingSystem::Unknown) {
+    return false;
+  }
+
+#if defined(XP_WIN)
+  if (aBlockedOS == OperatingSystem::Windows) {
+    // We do want even "unknown" aSystemOS to fall under "all windows"
+    return true;
+  }
+
+  constexpr uint32_t kMinWin10BuildNumber = 18362;
+  if (aBlockedOS == OperatingSystem::RecentWindows10 &&
+      aSystemOS == OperatingSystem::Windows10) {
+    // For allowlist purposes, we sometimes want to restrict to only recent
+    // versions of Windows 10. This is a bit of a kludge but easier than adding
+    // complicated blocklist infrastructure for build ID comparisons like driver
+    // versions.
+    return aSystemOSBuild >= kMinWin10BuildNumber;
+  }
+
+  if (aBlockedOS == OperatingSystem::NotRecentWindows10) {
+    if (aSystemOS == OperatingSystem::Windows10) {
+      return aSystemOSBuild < kMinWin10BuildNumber;
+    } else {
+      return true;
+    }
+  }
+#endif
+
+#if defined(XP_MACOSX)
+  if (aBlockedOS == OperatingSystem::OSX) {
+    // We do want even "unknown" aSystemOS to fall under "all OS X"
+    return true;
+  }
+#endif
+
+  return aSystemOS == aBlockedOS;
+}
+
+inline bool MatchingBattery(BatteryStatus aBatteryStatus, bool aHasBattery) {
+  switch (aBatteryStatus) {
+    case BatteryStatus::All:
+      return true;
+    case BatteryStatus::None:
+      return !aHasBattery;
+    case BatteryStatus::Present:
+      return aHasBattery;
+  }
+
+  MOZ_ASSERT_UNREACHABLE("bad battery status");
+  return false;
+}
+
+inline bool MatchingScreenSize(ScreenSizeStatus aScreenStatus,
+                               int64_t aScreenPixels) {
+  constexpr int64_t kMaxSmallPixels = 2304000;   // 1920x1200
+  constexpr int64_t kMaxMediumPixels = 4953600;  // 3440x1440
+
+  switch (aScreenStatus) {
+    case ScreenSizeStatus::All:
+      return true;
+    case ScreenSizeStatus::Small:
+      return aScreenPixels <= kMaxSmallPixels;
+    case ScreenSizeStatus::SmallAndMedium:
+      return aScreenPixels <= kMaxMediumPixels;
+    case ScreenSizeStatus::Medium:
+      return aScreenPixels > kMaxSmallPixels &&
+             aScreenPixels <= kMaxMediumPixels;
+    case ScreenSizeStatus::MediumAndLarge:
+      return aScreenPixels > kMaxSmallPixels;
+    case ScreenSizeStatus::Large:
+      return aScreenPixels > kMaxMediumPixels;
+  }
+
+  MOZ_ASSERT_UNREACHABLE("bad screen status");
+  return false;
+}
+
+int32_t GfxInfoBase::FindBlocklistedDeviceInList(
+    const nsTArray<GfxDriverInfo>& info, nsAString& aSuggestedVersion,
+    int32_t aFeature, nsACString& aFailureId, OperatingSystem os,
+    bool aForAllowing) {
+  int32_t status = nsIGfxInfo::FEATURE_STATUS_UNKNOWN;
+
+  // Some properties are not available on all platforms.
+  nsAutoString windowProtocol;
+  nsresult rv = GetWindowProtocol(windowProtocol);
+  if (NS_FAILED(rv) && rv != NS_ERROR_NOT_IMPLEMENTED) {
+    return 0;
+  }
+
+  bool hasBattery = false;
+  rv = GetHasBattery(&hasBattery);
+  if (NS_FAILED(rv) && rv != NS_ERROR_NOT_IMPLEMENTED) {
+    return 0;
+  }
+
+  uint32_t osBuild = OperatingSystemBuild();
+
+  // Get the adapters once then reuse below
+  nsAutoString adapterVendorID[2];
+  nsAutoString adapterDeviceID[2];
+  nsAutoString adapterDriverVendor[2];
+  nsAutoString adapterDriverVersionString[2];
+  bool adapterInfoFailed[2];
+
+  adapterInfoFailed[0] =
+      (NS_FAILED(GetAdapterVendorID(adapterVendorID[0])) ||
+       NS_FAILED(GetAdapterDeviceID(adapterDeviceID[0])) ||
+       NS_FAILED(GetAdapterDriverVendor(adapterDriverVendor[0])) ||
+       NS_FAILED(GetAdapterDriverVersion(adapterDriverVersionString[0])));
+  adapterInfoFailed[1] =
+      (NS_FAILED(GetAdapterVendorID2(adapterVendorID[1])) ||
+       NS_FAILED(GetAdapterDeviceID2(adapterDeviceID[1])) ||
+       NS_FAILED(GetAdapterDriverVendor2(adapterDriverVendor[1])) ||
+       NS_FAILED(GetAdapterDriverVersion2(adapterDriverVersionString[1])));
+  // No point in going on if we don't have adapter info
+  if (adapterInfoFailed[0] && adapterInfoFailed[1]) {
+    return 0;
+  }
+
+#if defined(XP_WIN) || defined(ANDROID) || defined(MOZ_WIDGET_GTK)
+  uint64_t driverVersion[2] = {0, 0};
+  if (!adapterInfoFailed[0]) {
+    ParseDriverVersion(adapterDriverVersionString[0], &driverVersion[0]);
+  }
+  if (!adapterInfoFailed[1]) {
+    ParseDriverVersion(adapterDriverVersionString[1], &driverVersion[1]);
+  }
+#endif
+
+  uint32_t i = 0;
+  for (; i < info.Length(); i++) {
+    // If the status is FEATURE_ALLOW_*, then it is for the allowlist, not
+    // blocklisting. Only consider entries for our search mode.
+    if (MatchingAllowStatus(info[i].mFeatureStatus) != aForAllowing) {
+      continue;
+    }
+
+    // If we don't have the info for this GPU, no need to check further.
+    // It is unclear that we would ever have a mixture of 1st and 2nd
+    // GPU, but leaving the code in for that possibility for now.
+    // (Actually, currently mGpu2 will never be true, so this can
+    // be optimized out.)
+    uint32_t infoIndex = info[i].mGpu2 ? 1 : 0;
+    if (adapterInfoFailed[infoIndex]) {
+      continue;
+    }
+
+    // Do the operating system check first, no point in getting the driver
+    // info if we won't need to use it.
+    if (!MatchingOperatingSystems(info[i].mOperatingSystem, os, osBuild)) {
+      continue;
+    }
+
+    if (info[i].mOperatingSystemVersion &&
+        info[i].mOperatingSystemVersion != OperatingSystemVersion()) {
+      continue;
+    }
+
+    if (!MatchingBattery(info[i].mBattery, hasBattery)) {
+      continue;
+    }
+
+    if (!MatchingScreenSize(info[i].mScreen, mScreenPixels)) {
+      continue;
+    }
+
+    if (!DoesWindowProtocolMatch(info[i].mWindowProtocol, windowProtocol)) {
+      continue;
+    }
+
+    if (!DoesVendorMatch(info[i].mAdapterVendor, adapterVendorID[infoIndex])) {
+      continue;
+    }
+
+    if (!DoesDriverVendorMatch(info[i].mDriverVendor,
+                               adapterDriverVendor[infoIndex])) {
+      continue;
+    }
+
+    if (info[i].mDevices && !info[i].mDevices->IsEmpty()) {
+      nsresult rv = info[i].mDevices->Contains(adapterDeviceID[infoIndex]);
+      if (rv == NS_ERROR_NOT_AVAILABLE) {
+        // Not found
+        continue;
+      }
+      if (rv != NS_OK) {
+        // Failed to search, allowlist should not match, blocklist should match
+        // for safety reasons
+        if (aForAllowing) {
+          continue;
+        }
+        break;
+      }
+    }
+
+    bool match = false;
+
+    if (!info[i].mHardware.IsEmpty() && !info[i].mHardware.Equals(Hardware())) {
+      continue;
+    }
+    if (!info[i].mModel.IsEmpty() && !info[i].mModel.Equals(Model())) {
+      continue;
+    }
+    if (!info[i].mProduct.IsEmpty() && !info[i].mProduct.Equals(Product())) {
+      continue;
+    }
+    if (!info[i].mManufacturer.IsEmpty() &&
+        !info[i].mManufacturer.Equals(Manufacturer())) {
+      continue;
+    }
+
+#if defined(XP_WIN) || defined(ANDROID) || defined(MOZ_WIDGET_GTK)
+    switch (info[i].mComparisonOp) {
+      case DRIVER_LESS_THAN:
+        match = driverVersion[infoIndex] < info[i].mDriverVersion;
+        break;
+      case DRIVER_BUILD_ID_LESS_THAN:
+        match = (driverVersion[infoIndex] & 0xFFFF) < info[i].mDriverVersion;
+        break;
+      case DRIVER_LESS_THAN_OR_EQUAL:
+        match = driverVersion[infoIndex] <= info[i].mDriverVersion;
+        break;
+      case DRIVER_BUILD_ID_LESS_THAN_OR_EQUAL:
+        match = (driverVersion[infoIndex] & 0xFFFF) <= info[i].mDriverVersion;
+        break;
+      case DRIVER_GREATER_THAN:
+        match = driverVersion[infoIndex] > info[i].mDriverVersion;
+        break;
+      case DRIVER_GREATER_THAN_OR_EQUAL:
+        match = driverVersion[infoIndex] >= info[i].mDriverVersion;
+        break;
+      case DRIVER_EQUAL:
+        match = driverVersion[infoIndex] == info[i].mDriverVersion;
+        break;
+      case DRIVER_NOT_EQUAL:
+        match = driverVersion[infoIndex] != info[i].mDriverVersion;
+        break;
+      case DRIVER_BETWEEN_EXCLUSIVE:
+        match = driverVersion[infoIndex] > info[i].mDriverVersion &&
+                driverVersion[infoIndex] < info[i].mDriverVersionMax;
+        break;
+      case DRIVER_BETWEEN_INCLUSIVE:
+        match = driverVersion[infoIndex] >= info[i].mDriverVersion &&
+                driverVersion[infoIndex] <= info[i].mDriverVersionMax;
+        break;
+      case DRIVER_BETWEEN_INCLUSIVE_START:
+        match = driverVersion[infoIndex] >= info[i].mDriverVersion &&
+                driverVersion[infoIndex] < info[i].mDriverVersionMax;
+        break;
+      case DRIVER_COMPARISON_IGNORED:
+        // We don't have a comparison op, so we match everything.
+        match = true;
+        break;
+      default:
+        NS_WARNING("Bogus op in GfxDriverInfo");
+        break;
+    }
+#else
+    // We don't care what driver version it was. We only check OS version and if
+    // the device matches.
+    match = true;
+#endif
+
+    if (match || info[i].mDriverVersion == GfxDriverInfo::allDriverVersions) {
+      if (info[i].mFeature == GfxDriverInfo::allFeatures ||
+          info[i].mFeature == aFeature) {
+        status = info[i].mFeatureStatus;
+        if (!info[i].mRuleId.IsEmpty()) {
+          aFailureId = info[i].mRuleId.get();
+        } else {
+          aFailureId = "FEATURE_FAILURE_DL_BLOCKLIST_NO_ID";
+        }
+        break;
+      }
+    }
+  }
+
+#if defined(XP_WIN)
+  // As a very special case, we block D2D on machines with an NVidia 310M GPU
+  // as either the primary or secondary adapter.  D2D is also blocked when the
+  // NV 310M is the primary adapter (using the standard blocklisting mechanism).
+  // If the primary GPU already matched something in the blocklist then we
+  // ignore this special rule.  See bug 1008759.
+  if (status == nsIGfxInfo::FEATURE_STATUS_UNKNOWN &&
+      (aFeature == nsIGfxInfo::FEATURE_DIRECT2D)) {
+    if (!adapterInfoFailed[1]) {
+      nsAString& nvVendorID =
+          (nsAString&)GfxDriverInfo::GetDeviceVendor(DeviceVendor::NVIDIA);
+      const nsString nv310mDeviceId = u"0x0A70"_ns;
+      if (nvVendorID.Equals(adapterVendorID[1],
+                            nsCaseInsensitiveStringComparator) &&
+          nv310mDeviceId.Equals(adapterDeviceID[1],
+                                nsCaseInsensitiveStringComparator)) {
+        status = nsIGfxInfo::FEATURE_BLOCKED_DEVICE;
+        aFailureId = "FEATURE_FAILURE_D2D_NV310M_BLOCK";
+      }
+    }
+  }
+
+  // Depends on Windows driver versioning. We don't pass a GfxDriverInfo object
+  // back to the Windows handler, so we must handle this here.
+  if (status == FEATURE_BLOCKED_DRIVER_VERSION) {
+    if (info[i].mSuggestedVersion) {
+      aSuggestedVersion.AppendPrintf("%s", info[i].mSuggestedVersion);
+    } else if (info[i].mComparisonOp == DRIVER_LESS_THAN &&
+               info[i].mDriverVersion != GfxDriverInfo::allDriverVersions) {
+      aSuggestedVersion.AppendPrintf(
+          "%lld.%lld.%lld.%lld",
+          (info[i].mDriverVersion & 0xffff000000000000) >> 48,
+          (info[i].mDriverVersion & 0x0000ffff00000000) >> 32,
+          (info[i].mDriverVersion & 0x00000000ffff0000) >> 16,
+          (info[i].mDriverVersion & 0x000000000000ffff));
+    }
+  }
+#endif
+
+  return status;
+}
+
+void GfxInfoBase::SetFeatureStatus(nsTArray<gfx::GfxInfoFeatureStatus>&& aFS) {
+  MOZ_ASSERT(!sFeatureStatus);
+  InitFeatureStatus(new nsTArray<gfx::GfxInfoFeatureStatus>(std::move(aFS)));
+}
+
+bool GfxInfoBase::DoesWindowProtocolMatch(
+    const nsAString& aBlocklistWindowProtocol,
+    const nsAString& aWindowProtocol) {
+  return aBlocklistWindowProtocol.Equals(aWindowProtocol,
+                                         nsCaseInsensitiveStringComparator) ||
+         aBlocklistWindowProtocol.Equals(
+             GfxDriverInfo::GetWindowProtocol(WindowProtocol::All),
+             nsCaseInsensitiveStringComparator);
+}
+
+bool GfxInfoBase::DoesVendorMatch(const nsAString& aBlocklistVendor,
+                                  const nsAString& aAdapterVendor) {
+  return aBlocklistVendor.Equals(aAdapterVendor,
+                                 nsCaseInsensitiveStringComparator) ||
+         aBlocklistVendor.Equals(
+             GfxDriverInfo::GetDeviceVendor(DeviceVendor::All),
+             nsCaseInsensitiveStringComparator);
+}
+
+bool GfxInfoBase::DoesDriverVendorMatch(const nsAString& aBlocklistVendor,
+                                        const nsAString& aDriverVendor) {
+  return aBlocklistVendor.Equals(aDriverVendor,
+                                 nsCaseInsensitiveStringComparator) ||
+         aBlocklistVendor.Equals(
+             GfxDriverInfo::GetDriverVendor(DriverVendor::All),
+             nsCaseInsensitiveStringComparator);
+}
+
+bool GfxInfoBase::IsFeatureAllowlisted(int32_t aFeature) const {
+  return aFeature == nsIGfxInfo::FEATURE_VIDEO_OVERLAY ||
+         aFeature == nsIGfxInfo::FEATURE_HW_DECODED_VIDEO_ZERO_COPY;
+}
+
+nsresult GfxInfoBase::GetFeatureStatusImpl(
+    int32_t aFeature, int32_t* aStatus, nsAString& aSuggestedVersion,
+    const nsTArray<GfxDriverInfo>& aDriverInfo, nsACString& aFailureId,
+    OperatingSystem* aOS /* = nullptr */) {
+  if (aFeature <= 0) {
+    gfxWarning() << "Invalid feature <= 0";
+    return NS_OK;
+  }
+
+  if (*aStatus != nsIGfxInfo::FEATURE_STATUS_UNKNOWN) {
+    // Terminate now with the status determined by the derived type (OS-specific
+    // code).
+    return NS_OK;
+  }
+
+  if (sShutdownOccurred) {
+    // This is futile; we've already commenced shutdown and our blocklists have
+    // been deleted. We may want to look into resurrecting the blocklist instead
+    // but for now, just don't even go there.
+    return NS_OK;
+  }
+
+  // Ensure any additional initialization required is complete.
+  GetData();
+
+  // If an operating system was provided by the derived GetFeatureStatusImpl,
+  // grab it here. Otherwise, the OS is unknown.
+  OperatingSystem os = (aOS ? *aOS : OperatingSystem::Unknown);
+
+  nsAutoString adapterVendorID;
+  nsAutoString adapterDeviceID;
+  nsAutoString adapterDriverVersionString;
+  if (NS_FAILED(GetAdapterVendorID(adapterVendorID)) ||
+      NS_FAILED(GetAdapterDeviceID(adapterDeviceID)) ||
+      NS_FAILED(GetAdapterDriverVersion(adapterDriverVersionString))) {
+    aFailureId = "FEATURE_FAILURE_CANT_RESOLVE_ADAPTER";
+    *aStatus = FEATURE_BLOCKED_DEVICE;
+    return NS_OK;
+  }
+
+  // We only check either the given blocklist, or the static list, as given.
+  int32_t status;
+  if (aDriverInfo.Length()) {
+    status =
+        FindBlocklistedDeviceInList(aDriverInfo, aSuggestedVersion, aFeature,
+                                    aFailureId, os, /* aForAllowing */ false);
+  } else {
+    if (!sDriverInfo) {
+      sDriverInfo = new nsTArray<GfxDriverInfo>();
+    }
+    status = FindBlocklistedDeviceInList(GetGfxDriverInfo(), aSuggestedVersion,
+                                         aFeature, aFailureId, os,
+                                         /* aForAllowing */ false);
+  }
+
+  if (status == nsIGfxInfo::FEATURE_STATUS_UNKNOWN) {
+    if (IsFeatureAllowlisted(aFeature)) {
+      // This feature is actually using the allowlist; that means after we pass
+      // the blocklist to prevent us explicitly from getting the feature, we now
+      // need to check the allowlist to ensure we are allowed to get it in the
+      // first place.
+      if (aDriverInfo.Length()) {
+        status = FindBlocklistedDeviceInList(aDriverInfo, aSuggestedVersion,
+                                             aFeature, aFailureId, os,
+                                             /* aForAllowing */ true);
+      } else {
+        status = FindBlocklistedDeviceInList(
+            GetGfxDriverInfo(), aSuggestedVersion, aFeature, aFailureId, os,
+            /* aForAllowing */ true);
+      }
+
+      if (status == nsIGfxInfo::FEATURE_STATUS_UNKNOWN) {
+        status = nsIGfxInfo::FEATURE_DENIED;
+      }
+    } else {
+      // It's now done being processed. It's safe to set the status to
+      // STATUS_OK.
+      status = nsIGfxInfo::FEATURE_STATUS_OK;
+    }
+  }
+
+  *aStatus = status;
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+GfxInfoBase::GetFeatureSuggestedDriverVersion(int32_t aFeature,
+                                              nsAString& aVersion) {
+  nsCString version;
+  if (GetPrefValueForDriverVersion(version)) {
+    aVersion = NS_ConvertASCIItoUTF16(version);
+    return NS_OK;
+  }
+
+  int32_t status;
+  nsCString discardFailureId;
+  nsTArray<GfxDriverInfo> driverInfo;
+  return GetFeatureStatusImpl(aFeature, &status, aVersion, driverInfo,
+                              discardFailureId);
+}
+
+void GfxInfoBase::EvaluateDownloadedBlocklist(
+    nsTArray<GfxDriverInfo>& aDriverInfo) {
+  // If the list is empty, then we don't actually want to call
+  // GetFeatureStatusImpl since we will use the static list instead. In that
+  // case, all we want to do is make sure the pref is removed.
+  if (aDriverInfo.IsEmpty()) {
+    gfxCriticalNoteOnce << "Evaluate empty downloaded blocklist";
+    return;
+  }
+
+  OperatingSystem os = GetOperatingSystem();
+
+  // For every feature we know about, we evaluate whether this blocklist has a
+  // non-STATUS_OK status. If it does, we set the pref we evaluate in
+  // GetFeatureStatus above, so we don't need to hold on to this blocklist
+  // anywhere permanent.
+  for (int feature = 1; feature <= nsIGfxInfo::FEATURE_MAX_VALUE; ++feature) {
+    int32_t status = nsIGfxInfo::FEATURE_STATUS_UNKNOWN;
+    nsCString failureId;
+    nsAutoString suggestedVersion;
+
+    // Note that we are careful to call the base class method since we only want
+    // to evaluate the downloadable blocklist for these prefs.
+    MOZ_ALWAYS_TRUE(NS_SUCCEEDED(GfxInfoBase::GetFeatureStatusImpl(
+        feature, &status, suggestedVersion, aDriverInfo, failureId, &os)));
+
+    switch (status) {
+      default:
+        MOZ_FALLTHROUGH_ASSERT("Unhandled feature status!");
+      case nsIGfxInfo::FEATURE_STATUS_UNKNOWN:
+        // This may be returned during shutdown or for invalid features.
+      case nsIGfxInfo::FEATURE_ALLOW_ALWAYS:
+      case nsIGfxInfo::FEATURE_ALLOW_QUALIFIED:
+      case nsIGfxInfo::FEATURE_DENIED:
+        // We cannot use the downloadable blocklist to control the allowlist.
+        // If a feature is allowlisted, then we should also ignore DENIED
+        // statuses from GetFeatureStatusImpl because we don't check the
+        // static list when and this is an expected value. If we wish to
+        // override the allowlist, it is as simple as creating a normal
+        // blocklist rule with a BLOCKED* status code.
+      case nsIGfxInfo::FEATURE_STATUS_OK:
+        RemovePrefForFeature(feature);
+        break;
+
+      case nsIGfxInfo::FEATURE_BLOCKED_DRIVER_VERSION:
+        if (!suggestedVersion.IsEmpty()) {
+          SetPrefValueForDriverVersion(suggestedVersion);
+        } else {
+          RemovePrefForDriverVersion();
+        }
+        [[fallthrough]];
+
+      case nsIGfxInfo::FEATURE_BLOCKED_MISMATCHED_VERSION:
+      case nsIGfxInfo::FEATURE_BLOCKED_DEVICE:
+      case nsIGfxInfo::FEATURE_DISCOURAGED:
+      case nsIGfxInfo::FEATURE_BLOCKED_OS_VERSION:
+      case nsIGfxInfo::FEATURE_BLOCKED_PLATFORM_TEST:
+        SetPrefValueForFeature(feature, status, failureId);
+        break;
+    }
+  }
+}
+
+NS_IMETHODIMP_(void)
+GfxInfoBase::LogFailure(const nsACString& failure) {
+  // gfxCriticalError has a mutex lock of its own, so we may not actually
+  // need this lock. ::GetFailures() accesses the data but the LogForwarder
+  // will not return the copy of the logs unless it can get the same lock
+  // that gfxCriticalError uses.  Still, that is so much of an implementation
+  // detail that it's nicer to just add an extra lock here and in
+  // ::GetFailures()
+  MutexAutoLock lock(mMutex);
+
+  // By default, gfxCriticalError asserts; make it not assert in this case.
+  gfxCriticalError(CriticalLog::DefaultOptions(false))
+      << "(LF) " << failure.BeginReading();
+}
+
+NS_IMETHODIMP GfxInfoBase::GetFailures(nsTArray<int32_t>& indices,
+                                       nsTArray<nsCString>& failures) {
+  MutexAutoLock lock(mMutex);
+
+  LogForwarder* logForwarder = Factory::GetLogForwarder();
+  if (!logForwarder) {
+    return NS_ERROR_UNEXPECTED;
+  }
+
+  // There are two string copies in this method, starting with this one. We are
+  // assuming this is not a big deal, as the size of the array should be small
+  // and the strings in it should be small as well (the error messages in the
+  // code.)  The second copy happens with the AppendElement() calls.
+  // Technically, we don't need the mutex lock after the StringVectorCopy()
+  // call.
+  LoggingRecord loggedStrings = logForwarder->LoggingRecordCopy();
+  LoggingRecord::const_iterator it;
+  for (it = loggedStrings.begin(); it != loggedStrings.end(); ++it) {
+    failures.AppendElement(nsDependentCSubstring(std::get<1>(*it).c_str(),
+                                                 std::get<1>(*it).size()));
+    indices.AppendElement(std::get<0>(*it));
+  }
+
+  return NS_OK;
+}
+
+nsTArray<GfxInfoCollectorBase*>* sCollectors;
+
+static void InitCollectors() {
+  if (!sCollectors) sCollectors = new nsTArray<GfxInfoCollectorBase*>;
+}
+
+nsresult GfxInfoBase::GetInfo(JSContext* aCx,
+                              JS::MutableHandle<JS::Value> aResult) {
+  InitCollectors();
+  InfoObject obj(aCx);
+
+  for (uint32_t i = 0; i < sCollectors->Length(); i++) {
+    (*sCollectors)[i]->GetInfo(obj);
+  }
+
+  // Some example property definitions
+  // obj.DefineProperty("wordCacheSize", gfxTextRunWordCache::Count());
+  // obj.DefineProperty("renderer", mRendererIDsString);
+  // obj.DefineProperty("five", 5);
+
+  if (!obj.mOk) {
+    return NS_ERROR_FAILURE;
+  }
+
+  aResult.setObject(*obj.mObj);
+  return NS_OK;
+}
+
+nsAutoCString gBaseAppVersion;
+
+const nsCString& GfxInfoBase::GetApplicationVersion() {
+  static bool versionInitialized = false;
+  if (!versionInitialized) {
+    // If we fail to get the version, we will not try again.
+    versionInitialized = true;
+
+    // Get the version from xpcom/system/nsIXULAppInfo.idl
+    nsCOMPtr<nsIXULAppInfo> app = do_GetService("@mozilla.org/xre/app-info;1");
+    if (app) {
+      app->GetVersion(gBaseAppVersion);
+    }
+  }
+  return gBaseAppVersion;
+}
+
+void GfxInfoBase::AddCollector(GfxInfoCollectorBase* collector) {
+  InitCollectors();
+  sCollectors->AppendElement(collector);
+}
+
+void GfxInfoBase::RemoveCollector(GfxInfoCollectorBase* collector) {
+  InitCollectors();
+  for (uint32_t i = 0; i < sCollectors->Length(); i++) {
+    if ((*sCollectors)[i] == collector) {
+      sCollectors->RemoveElementAt(i);
+      break;
+    }
+  }
+  if (sCollectors->IsEmpty()) {
+    delete sCollectors;
+    sCollectors = nullptr;
+  }
+}
+
+static void AppendMonitor(JSContext* aCx, widget::Screen& aScreen,
+                          JS::Handle<JSObject*> aOutArray, int32_t aIndex) {
+  JS::Rooted<JSObject*> obj(aCx, JS_NewPlainObject(aCx));
+
+  auto screenSize = aScreen.GetRect().Size();
+
+  JS::Rooted<JS::Value> screenWidth(aCx, JS::Int32Value(screenSize.width));
+  JS_SetProperty(aCx, obj, "screenWidth", screenWidth);
+
+  JS::Rooted<JS::Value> screenHeight(aCx, JS::Int32Value(screenSize.height));
+  JS_SetProperty(aCx, obj, "screenHeight", screenHeight);
+
+  // XXX Just preserving behavior since this is exposed to telemetry, but we
+  // could consider including this everywhere.
+#ifdef XP_MACOSX
+  JS::Rooted<JS::Value> scale(
+      aCx, JS::NumberValue(aScreen.GetContentsScaleFactor()));
+  JS_SetProperty(aCx, obj, "scale", scale);
+#endif
+
+#ifdef XP_WIN
+  JS::Rooted<JS::Value> refreshRate(aCx,
+                                    JS::Int32Value(aScreen.GetRefreshRate()));
+  JS_SetProperty(aCx, obj, "refreshRate", refreshRate);
+
+  JS::Rooted<JS::Value> pseudoDisplay(
+      aCx, JS::BooleanValue(aScreen.GetIsPseudoDisplay()));
+  JS_SetProperty(aCx, obj, "pseudoDisplay", pseudoDisplay);
+#endif
+
+  JS::Rooted<JS::Value> element(aCx, JS::ObjectValue(*obj));
+  JS_SetElement(aCx, aOutArray, aIndex, element);
+}
+
+nsresult GfxInfoBase::FindMonitors(JSContext* aCx,
+                                   JS::Handle<JSObject*> aOutArray) {
+  int32_t index = 0;
+  auto& sm = ScreenManager::GetSingleton();
+  for (auto& screen : sm.CurrentScreenList()) {
+    AppendMonitor(aCx, *screen, aOutArray, index++);
+  }
+
+  if (index == 0) {
+    // Ensure we return at least one monitor, this is needed for xpcshell.
+    RefPtr<Screen> screen = sm.GetPrimaryScreen();
+    AppendMonitor(aCx, *screen, aOutArray, index++);
+  }
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+GfxInfoBase::GetMonitors(JSContext* aCx, JS::MutableHandle<JS::Value> aResult) {
+  JS::Rooted<JSObject*> array(aCx, JS::NewArrayObject(aCx, 0));
+
+  nsresult rv = FindMonitors(aCx, array);
+  if (NS_FAILED(rv)) {
+    return rv;
+  }
+
+  aResult.setObject(*array);
+  return NS_OK;
+}
+
+static inline bool SetJSPropertyString(JSContext* aCx,
+                                       JS::Handle<JSObject*> aObj,
+                                       const char* aProp, const char* aString) {
+  JS::Rooted<JSString*> str(aCx, JS_NewStringCopyZ(aCx, aString));
+  if (!str) {
+    return false;
+  }
+
+  JS::Rooted<JS::Value> val(aCx, JS::StringValue(str));
+  return JS_SetProperty(aCx, aObj, aProp, val);
+}
+
+template <typename T>
+static inline bool AppendJSElement(JSContext* aCx, JS::Handle<JSObject*> aObj,
+                                   const T& aValue) {
+  uint32_t index;
+  if (!JS::GetArrayLength(aCx, aObj, &index)) {
+    return false;
+  }
+  return JS_SetElement(aCx, aObj, index, aValue);
+}
+
+nsresult GfxInfoBase::GetFeatures(JSContext* aCx,
+                                  JS::MutableHandle<JS::Value> aOut) {
+  JS::Rooted<JSObject*> obj(aCx, JS_NewPlainObject(aCx));
+  if (!obj) {
+    return NS_ERROR_OUT_OF_MEMORY;
+  }
+  aOut.setObject(*obj);
+
+  layers::LayersBackend backend =
+      gfxPlatform::Initialized()
+          ? gfxPlatform::GetPlatform()->GetCompositorBackend()
+          : layers::LayersBackend::LAYERS_NONE;
+  const char* backendName = layers::GetLayersBackendName(backend);
+  SetJSPropertyString(aCx, obj, "compositor", backendName);
+
+  // If graphics isn't initialized yet, just stop now.
+  if (!gfxPlatform::Initialized()) {
+    return NS_OK;
+  }
+
+  DescribeFeatures(aCx, obj);
+  return NS_OK;
+}
+
+nsresult GfxInfoBase::GetFeatureLog(JSContext* aCx,
+                                    JS::MutableHandle<JS::Value> aOut) {
+  JS::Rooted<JSObject*> containerObj(aCx, JS_NewPlainObject(aCx));
+  if (!containerObj) {
+    return NS_ERROR_OUT_OF_MEMORY;
+  }
+  aOut.setObject(*containerObj);
+
+  JS::Rooted<JSObject*> featureArray(aCx, JS::NewArrayObject(aCx, 0));
+  if (!featureArray) {
+    return NS_ERROR_OUT_OF_MEMORY;
+  }
+
+  // Collect features.
+  gfxConfig::ForEachFeature([&](const char* aName, const char* aDescription,
+                                FeatureState& aFeature) -> void {
+    JS::Rooted<JSObject*> obj(aCx, JS_NewPlainObject(aCx));
+    if (!obj) {
+      return;
+    }
+    if (!SetJSPropertyString(aCx, obj, "name", aName) ||
+        !SetJSPropertyString(aCx, obj, "description", aDescription) ||
+        !SetJSPropertyString(aCx, obj, "status",
+                             FeatureStatusToString(aFeature.GetValue()))) {
+      return;
+    }
+
+    JS::Rooted<JS::Value> log(aCx);
+    if (!BuildFeatureStateLog(aCx, aFeature, &log)) {
+      return;
+    }
+    if (!JS_SetProperty(aCx, obj, "log", log)) {
+      return;
+    }
+
+    if (!AppendJSElement(aCx, featureArray, obj)) {
+      return;
+    }
+  });
+
+  JS::Rooted<JSObject*> fallbackArray(aCx, JS::NewArrayObject(aCx, 0));
+  if (!fallbackArray) {
+    return NS_ERROR_OUT_OF_MEMORY;
+  }
+
+  // Collect fallbacks.
+  gfxConfig::ForEachFallback(
+      [&](const char* aName, const char* aMessage) -> void {
+        JS::Rooted<JSObject*> obj(aCx, JS_NewPlainObject(aCx));
+        if (!obj) {
+          return;
+        }
+
+        if (!SetJSPropertyString(aCx, obj, "name", aName) ||
+            !SetJSPropertyString(aCx, obj, "message", aMessage)) {
+          return;
+        }
+
+        if (!AppendJSElement(aCx, fallbackArray, obj)) {
+          return;
+        }
+      });
+
+  JS::Rooted<JS::Value> val(aCx);
+
+  val = JS::ObjectValue(*featureArray);
+  JS_SetProperty(aCx, containerObj, "features", val);
+
+  val = JS::ObjectValue(*fallbackArray);
+  JS_SetProperty(aCx, containerObj, "fallbacks", val);
+
+  return NS_OK;
+}
+
+bool GfxInfoBase::BuildFeatureStateLog(JSContext* aCx,
+                                       const FeatureState& aFeature,
+                                       JS::MutableHandle<JS::Value> aOut) {
+  JS::Rooted<JSObject*> log(aCx, JS::NewArrayObject(aCx, 0));
+  if (!log) {
+    return false;
+  }
+  aOut.setObject(*log);
+
+  aFeature.ForEachStatusChange([&](const char* aType, FeatureStatus aStatus,
+                                   const char* aMessage,
+                                   const nsCString& aFailureId) -> void {
+    JS::Rooted<JSObject*> obj(aCx, JS_NewPlainObject(aCx));
+    if (!obj) {
+      return;
+    }
+
+    if (!SetJSPropertyString(aCx, obj, "type", aType) ||
+        !SetJSPropertyString(aCx, obj, "status",
+                             FeatureStatusToString(aStatus)) ||
+        (!aFailureId.IsEmpty() &&
+         !SetJSPropertyString(aCx, obj, "failureId", aFailureId.get())) ||
+        (aMessage && !SetJSPropertyString(aCx, obj, "message", aMessage))) {
+      return;
+    }
+
+    if (!AppendJSElement(aCx, log, obj)) {
+      return;
+    }
+  });
+
+  return true;
+}
+
+void GfxInfoBase::DescribeFeatures(JSContext* aCx, JS::Handle<JSObject*> aObj) {
+  JS::Rooted<JSObject*> obj(aCx);
+
+  gfx::FeatureState& hwCompositing =
+      gfxConfig::GetFeature(gfx::Feature::HW_COMPOSITING);
+  InitFeatureObject(aCx, aObj, "hwCompositing", hwCompositing, &obj);
+
+  gfx::FeatureState& gpuProcess =
+      gfxConfig::GetFeature(gfx::Feature::GPU_PROCESS);
+  InitFeatureObject(aCx, aObj, "gpuProcess", gpuProcess, &obj);
+
+  gfx::FeatureState& webrender = gfxConfig::GetFeature(gfx::Feature::WEBRENDER);
+  InitFeatureObject(aCx, aObj, "webrender", webrender, &obj);
+
+  gfx::FeatureState& wrCompositor =
+      gfxConfig::GetFeature(gfx::Feature::WEBRENDER_COMPOSITOR);
+  InitFeatureObject(aCx, aObj, "wrCompositor", wrCompositor, &obj);
+
+  gfx::FeatureState& openglCompositing =
+      gfxConfig::GetFeature(gfx::Feature::OPENGL_COMPOSITING);
+  InitFeatureObject(aCx, aObj, "openglCompositing", openglCompositing, &obj);
+
+  gfx::FeatureState& omtp = gfxConfig::GetFeature(gfx::Feature::OMTP);
+  InitFeatureObject(aCx, aObj, "omtp", omtp, &obj);
+}
+
+bool GfxInfoBase::InitFeatureObject(JSContext* aCx,
+                                    JS::Handle<JSObject*> aContainer,
+                                    const char* aName,
+                                    mozilla::gfx::FeatureState& aFeatureState,
+                                    JS::MutableHandle<JSObject*> aOutObj) {
+  JS::Rooted<JSObject*> obj(aCx, JS_NewPlainObject(aCx));
+  if (!obj) {
+    return false;
+  }
+
+  nsCString status = aFeatureState.GetStatusAndFailureIdString();
+
+  JS::Rooted<JSString*> str(aCx, JS_NewStringCopyZ(aCx, status.get()));
+  JS::Rooted<JS::Value> val(aCx, JS::StringValue(str));
+  JS_SetProperty(aCx, obj, "status", val);
+
+  // Add the feature object to the container.
+  {
+    JS::Rooted<JS::Value> val(aCx, JS::ObjectValue(*obj));
+    JS_SetProperty(aCx, aContainer, aName, val);
+  }
+
+  aOutObj.set(obj);
+  return true;
+}
+
+nsresult GfxInfoBase::GetActiveCrashGuards(JSContext* aCx,
+                                           JS::MutableHandle<JS::Value> aOut) {
+  JS::Rooted<JSObject*> array(aCx, JS::NewArrayObject(aCx, 0));
+  if (!array) {
+    return NS_ERROR_OUT_OF_MEMORY;
+  }
+  aOut.setObject(*array);
+
+  DriverCrashGuard::ForEachActiveCrashGuard(
+      [&](const char* aName, const char* aPrefName) -> void {
+        JS::Rooted<JSObject*> obj(aCx, JS_NewPlainObject(aCx));
+        if (!obj) {
+          return;
+        }
+        if (!SetJSPropertyString(aCx, obj, "type", aName)) {
+          return;
+        }
+        if (!SetJSPropertyString(aCx, obj, "prefName", aPrefName)) {
+          return;
+        }
+        if (!AppendJSElement(aCx, array, obj)) {
+          return;
+        }
+      });
+
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+GfxInfoBase::GetTargetFrameRate(uint32_t* aTargetFrameRate) {
+  *aTargetFrameRate = gfxPlatform::TargetFrameRate();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+GfxInfoBase::GetCodecSupportInfo(nsACString& aCodecSupportInfo) {
+  aCodecSupportInfo.Assign(gfx::gfxVars::CodecSupportInfo());
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+GfxInfoBase::GetIsHeadless(bool* aIsHeadless) {
+  *aIsHeadless = gfxPlatform::IsHeadless();
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+GfxInfoBase::GetContentBackend(nsAString& aContentBackend) {
+  BackendType backend = gfxPlatform::GetPlatform()->GetDefaultContentBackend();
+  nsString outStr;
+
+  switch (backend) {
+    case BackendType::DIRECT2D1_1: {
+      outStr.AppendPrintf("Direct2D 1.1");
+      break;
+    }
+    case BackendType::SKIA: {
+      outStr.AppendPrintf("Skia");
+      break;
+    }
+    case BackendType::CAIRO: {
+      outStr.AppendPrintf("Cairo");
+      break;
+    }
+    default:
+      return NS_ERROR_FAILURE;
+  }
+
+  aContentBackend.Assign(outStr);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+GfxInfoBase::GetAzureCanvasBackend(nsAString& aBackend) {
+  CopyASCIItoUTF16(mozilla::MakeStringSpan(
+                       gfxPlatform::GetPlatform()->GetAzureCanvasBackend()),
+                   aBackend);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+GfxInfoBase::GetAzureContentBackend(nsAString& aBackend) {
+  CopyASCIItoUTF16(mozilla::MakeStringSpan(
+                       gfxPlatform::GetPlatform()->GetAzureContentBackend()),
+                   aBackend);
+  return NS_OK;
+}
+
+NS_IMETHODIMP
+GfxInfoBase::GetUsingGPUProcess(bool* aOutValue) {
+  GPUProcessManager* gpu = GPUProcessManager::Get();
+  if (!gpu) {
+    // Not supported in content processes.
+    return NS_ERROR_FAILURE;
+  }
+
+  *aOutValue = !!gpu->GetGPUChild();
+  return NS_OK;
+}
+
+NS_IMETHODIMP_(int32_t)
+GfxInfoBase::GetMaxRefreshRate(bool* aMixed) {
+  if (aMixed) {
+    *aMixed = false;
+  }
+
+  int32_t maxRefreshRate = 0;
+  for (auto& screen : ScreenManager::GetSingleton().CurrentScreenList()) {
+    int32_t refreshRate = screen->GetRefreshRate();
+    if (aMixed && maxRefreshRate > 0 && maxRefreshRate != refreshRate) {
+      *aMixed = true;
+    }
+    maxRefreshRate = std::max(maxRefreshRate, refreshRate);
+  }
+
+  return maxRefreshRate > 0 ? maxRefreshRate : -1;
+}
+
+NS_IMETHODIMP
+GfxInfoBase::ControlGPUProcessForXPCShell(bool aEnable, bool* _retval) {
+  gfxPlatform::GetPlatform();
+
+  GPUProcessManager* gpm = GPUProcessManager::Get();
+  if (aEnable) {
+    if (!gfxConfig::IsEnabled(gfx::Feature::GPU_PROCESS)) {
+      gfxConfig::UserForceEnable(gfx::Feature::GPU_PROCESS, "xpcshell-test");
+    }
+    DebugOnly<nsresult> rv = gpm->EnsureGPUReady();
+    MOZ_ASSERT(rv != NS_ERROR_ILLEGAL_DURING_SHUTDOWN);
+  } else {
+    gfxConfig::UserDisable(gfx::Feature::GPU_PROCESS, "xpcshell-test");
+    gpm->KillProcess();
+  }
+
+  *_retval = true;
+  return NS_OK;
+}
+
+NS_IMETHODIMP GfxInfoBase::KillGPUProcessForTests() {
+  GPUProcessManager* gpm = GPUProcessManager::Get();
+  if (!gpm) {
+    // gfxPlatform has not been initialized.
+    return NS_ERROR_NOT_INITIALIZED;
+  }
+
+  gpm->KillProcess();
+  return NS_OK;
+}
+
+NS_IMETHODIMP GfxInfoBase::CrashGPUProcessForTests() {
+  GPUProcessManager* gpm = GPUProcessManager::Get();
+  if (!gpm) {
+    // gfxPlatform has not been initialized.
+    return NS_ERROR_NOT_INITIALIZED;
+  }
+
+  gpm->CrashProcess();
+  return NS_OK;
+}
+
+GfxInfoCollectorBase::GfxInfoCollectorBase() {
+  GfxInfoBase::AddCollector(this);
+}
+
+GfxInfoCollectorBase::~GfxInfoCollectorBase() {
+  GfxInfoBase::RemoveCollector(this);
+}