widget/GfxInfoBase.cpp

   1 /* vim: se cin sw=2 ts=2 et : */
   2 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   3  *
   4  * This Source Code Form is subject to the terms of the Mozilla Public
   5  * License, v. 2.0. If a copy of the MPL was not distributed with this
   6  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   7
   8 #include "mozilla/ArrayUtils.h"
   9
  10 #include "GfxInfoBase.h"
  11
  12 #include <mutex>  // std::call_once
  13
  14 #include "GfxDriverInfo.h"
  15 #include "js/Array.h"               // JS::GetArrayLength, JS::NewArrayObject
  16 #include "js/PropertyAndElement.h"  // JS_SetElement, JS_SetProperty
  17 #include "nsCOMPtr.h"
  18 #include "nsCOMArray.h"
  19 #include "nsString.h"
  20 #include "nsUnicharUtils.h"
  21 #include "nsVersionComparator.h"
  22 #include "mozilla/Services.h"
  23 #include "mozilla/Observer.h"
  24 #include "nsIObserver.h"
  25 #include "nsIObserverService.h"
  26 #include "nsTArray.h"
  27 #include "nsXULAppAPI.h"
  28 #include "nsIXULAppInfo.h"
  29 #include "mozilla/BinarySearch.h"
  30 #include "mozilla/ClearOnShutdown.h"
  31 #include "mozilla/Preferences.h"
  32 #include "mozilla/StaticPrefs_gfx.h"
  33 #include "mozilla/gfx/2D.h"
  34 #include "mozilla/gfx/BuildConstants.h"
  35 #include "mozilla/gfx/GPUProcessManager.h"
  36 #include "mozilla/gfx/Logging.h"
  37 #include "mozilla/gfx/gfxVars.h"
  38 #include "mozilla/widget/ScreenManager.h"
  39 #include "mozilla/widget/Screen.h"
  40
  41 #include "jsapi.h"
  42
  43 #include "gfxPlatform.h"
  44 #include "gfxConfig.h"
  45 #include "DriverCrashGuard.h"
  46
  47 #ifdef MOZ_WIDGET_ANDROID
  48 #  include <set>
  49 #  include "AndroidBuild.h"
  50 #endif
  51
  52 using namespace mozilla::widget;
  53 using namespace mozilla;
  54 using mozilla::MutexAutoLock;
  55
  56 nsTArray<GfxDriverInfo>* GfxInfoBase::sDriverInfo;
  57 StaticAutoPtr<nsTArray<gfx::GfxInfoFeatureStatus>> GfxInfoBase::sFeatureStatus;
  58 bool GfxInfoBase::sDriverInfoObserverInitialized;
  59 bool GfxInfoBase::sShutdownOccurred;
  60
  61 // Call this when setting sFeatureStatus to a non-null pointer to
  62 // ensure destruction even if the GfxInfo component is never instantiated.
  63 static void InitFeatureStatus(nsTArray<gfx::GfxInfoFeatureStatus>* aPtr) {
  64   static std::once_flag sOnce;
  65   std::call_once(sOnce, [] { ClearOnShutdown(&GfxInfoBase::sFeatureStatus); });
  66   GfxInfoBase::sFeatureStatus = aPtr;
  67 }
  68
  69 // Observes for shutdown so that the child GfxDriverInfo list is freed.
  70 class ShutdownObserver : public nsIObserver {
  71   virtual ~ShutdownObserver() = default;
  72
  73  public:
  74   ShutdownObserver() = default;
  75
  76   NS_DECL_ISUPPORTS
  77
  78   NS_IMETHOD Observe(nsISupports* subject, const char* aTopic,
  79                      const char16_t* aData) override {
  80     MOZ_ASSERT(strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID) == 0);
  81
  82     delete GfxInfoBase::sDriverInfo;
  83     GfxInfoBase::sDriverInfo = nullptr;
  84
  85     for (auto& deviceFamily : GfxDriverInfo::sDeviceFamilies) {
  86       delete deviceFamily;
  87       deviceFamily = nullptr;
  88     }
  89
  90     for (auto& windowProtocol : GfxDriverInfo::sWindowProtocol) {
  91       delete windowProtocol;
  92       windowProtocol = nullptr;
  93     }
  94
  95     for (auto& deviceVendor : GfxDriverInfo::sDeviceVendors) {
  96       delete deviceVendor;
  97       deviceVendor = nullptr;
  98     }
  99
 100     for (auto& driverVendor : GfxDriverInfo::sDriverVendors) {
 101       delete driverVendor;
 102       driverVendor = nullptr;
 103     }
 104
 105     GfxInfoBase::sShutdownOccurred = true;
 106
 107     return NS_OK;
 108   }
 109 };
 110
 111 NS_IMPL_ISUPPORTS(ShutdownObserver, nsIObserver)
 112
 113 static void InitGfxDriverInfoShutdownObserver() {
 114   if (GfxInfoBase::sDriverInfoObserverInitialized) return;
 115
 116   GfxInfoBase::sDriverInfoObserverInitialized = true;
 117
 118   nsCOMPtr<nsIObserverService> observerService = services::GetObserverService();
 119   if (!observerService) {
 120     NS_WARNING("Could not get observer service!");
 121     return;
 122   }
 123
 124   ShutdownObserver* obs = new ShutdownObserver();
 125   observerService->AddObserver(obs, NS_XPCOM_SHUTDOWN_OBSERVER_ID, false);
 126 }
 127
 128 using namespace mozilla::widget;
 129 using namespace mozilla::gfx;
 130 using namespace mozilla;
 131
 132 NS_IMPL_ISUPPORTS(GfxInfoBase, nsIGfxInfo, nsIObserver,
 133                   nsISupportsWeakReference)
 134
 135 #define BLOCKLIST_PREF_BRANCH "gfx.blacklist."
 136 #define SUGGESTED_VERSION_PREF BLOCKLIST_PREF_BRANCH "suggested-driver-version"
 137
 138 static const char* GetPrefNameForFeature(int32_t aFeature) {
 139   const char* name = nullptr;
 140   switch (aFeature) {
 141     case nsIGfxInfo::FEATURE_DIRECT2D:
 142       name = BLOCKLIST_PREF_BRANCH "direct2d";
 143       break;
 144     case nsIGfxInfo::FEATURE_DIRECT3D_9_LAYERS:
 145       name = BLOCKLIST_PREF_BRANCH "layers.direct3d9";
 146       break;
 147     case nsIGfxInfo::FEATURE_DIRECT3D_10_LAYERS:
 148       name = BLOCKLIST_PREF_BRANCH "layers.direct3d10";
 149       break;
 150     case nsIGfxInfo::FEATURE_DIRECT3D_10_1_LAYERS:
 151       name = BLOCKLIST_PREF_BRANCH "layers.direct3d10-1";
 152       break;
 153     case nsIGfxInfo::FEATURE_DIRECT3D_11_LAYERS:
 154       name = BLOCKLIST_PREF_BRANCH "layers.direct3d11";
 155       break;
 156     case nsIGfxInfo::FEATURE_DIRECT3D_11_ANGLE:
 157       name = BLOCKLIST_PREF_BRANCH "direct3d11angle";
 158       break;
 159     case nsIGfxInfo::FEATURE_HARDWARE_VIDEO_DECODING:
 160       name = BLOCKLIST_PREF_BRANCH "hardwarevideodecoding";
 161       break;
 162     case nsIGfxInfo::FEATURE_OPENGL_LAYERS:
 163       name = BLOCKLIST_PREF_BRANCH "layers.opengl";
 164       break;
 165     case nsIGfxInfo::FEATURE_WEBGL_OPENGL:
 166       name = BLOCKLIST_PREF_BRANCH "webgl.opengl";
 167       break;
 168     case nsIGfxInfo::FEATURE_WEBGL_ANGLE:
 169       name = BLOCKLIST_PREF_BRANCH "webgl.angle";
 170       break;
 171     case nsIGfxInfo::UNUSED_FEATURE_WEBGL_MSAA:
 172       name = BLOCKLIST_PREF_BRANCH "webgl.msaa";
 173       break;
 174     case nsIGfxInfo::FEATURE_STAGEFRIGHT:
 175       name = BLOCKLIST_PREF_BRANCH "stagefright";
 176       break;
 177     case nsIGfxInfo::FEATURE_WEBRTC_HW_ACCELERATION_H264:
 178       name = BLOCKLIST_PREF_BRANCH "webrtc.hw.acceleration.h264";
 179       break;
 180     case nsIGfxInfo::FEATURE_WEBRTC_HW_ACCELERATION_ENCODE:
 181       name = BLOCKLIST_PREF_BRANCH "webrtc.hw.acceleration.encode";
 182       break;
 183     case nsIGfxInfo::FEATURE_WEBRTC_HW_ACCELERATION_DECODE:
 184       name = BLOCKLIST_PREF_BRANCH "webrtc.hw.acceleration.decode";
 185       break;
 186     case nsIGfxInfo::FEATURE_CANVAS2D_ACCELERATION:
 187       name = BLOCKLIST_PREF_BRANCH "canvas2d.acceleration";
 188       break;
 189     case nsIGfxInfo::FEATURE_DX_INTEROP2:
 190       name = BLOCKLIST_PREF_BRANCH "dx.interop2";
 191       break;
 192     case nsIGfxInfo::FEATURE_GPU_PROCESS:
 193       name = BLOCKLIST_PREF_BRANCH "gpu.process";
 194       break;
 195     case nsIGfxInfo::FEATURE_WEBGL2:
 196       name = BLOCKLIST_PREF_BRANCH "webgl2";
 197       break;
 198     case nsIGfxInfo::FEATURE_D3D11_KEYED_MUTEX:
 199       name = BLOCKLIST_PREF_BRANCH "d3d11.keyed.mutex";
 200       break;
 201     case nsIGfxInfo::FEATURE_WEBRENDER:
 202       name = BLOCKLIST_PREF_BRANCH "webrender";
 203       break;
 204     case nsIGfxInfo::FEATURE_WEBRENDER_COMPOSITOR:
 205       name = BLOCKLIST_PREF_BRANCH "webrender.compositor";
 206       break;
 207     case nsIGfxInfo::FEATURE_DX_NV12:
 208       name = BLOCKLIST_PREF_BRANCH "dx.nv12";
 209       break;
 210     case nsIGfxInfo::FEATURE_DX_P010:
 211       name = BLOCKLIST_PREF_BRANCH "dx.p010";
 212       break;
 213     case nsIGfxInfo::FEATURE_DX_P016:
 214       name = BLOCKLIST_PREF_BRANCH "dx.p016";
 215       break;
 216     case nsIGfxInfo::FEATURE_VP8_HW_DECODE:
 217       name = BLOCKLIST_PREF_BRANCH "vp8.hw-decode";
 218       break;
 219     case nsIGfxInfo::FEATURE_VP9_HW_DECODE:
 220       name = BLOCKLIST_PREF_BRANCH "vp9.hw-decode";
 221       break;
 222     case nsIGfxInfo::FEATURE_GL_SWIZZLE:
 223       name = BLOCKLIST_PREF_BRANCH "gl.swizzle";
 224       break;
 225     case nsIGfxInfo::FEATURE_WEBRENDER_SCISSORED_CACHE_CLEARS:
 226       name = BLOCKLIST_PREF_BRANCH "webrender.scissored_cache_clears";
 227       break;
 228     case nsIGfxInfo::FEATURE_ALLOW_WEBGL_OUT_OF_PROCESS:
 229       name = BLOCKLIST_PREF_BRANCH "webgl.allow-oop";
 230       break;
 231     case nsIGfxInfo::FEATURE_THREADSAFE_GL:
 232       name = BLOCKLIST_PREF_BRANCH "gl.threadsafe";
 233       break;
 234     case nsIGfxInfo::FEATURE_WEBRENDER_OPTIMIZED_SHADERS:
 235       name = BLOCKLIST_PREF_BRANCH "webrender.optimized-shaders";
 236       break;
 237     case nsIGfxInfo::FEATURE_X11_EGL:
 238       name = BLOCKLIST_PREF_BRANCH "x11.egl";
 239       break;
 240     case nsIGfxInfo::FEATURE_DMABUF:
 241       name = BLOCKLIST_PREF_BRANCH "dmabuf";
 242       break;
 243     case nsIGfxInfo::FEATURE_WEBGPU:
 244       name = BLOCKLIST_PREF_BRANCH "webgpu";
 245       break;
 246     case nsIGfxInfo::FEATURE_VIDEO_OVERLAY:
 247       name = BLOCKLIST_PREF_BRANCH "video-overlay";
 248       break;
 249     case nsIGfxInfo::FEATURE_HW_DECODED_VIDEO_ZERO_COPY:
 250       name = BLOCKLIST_PREF_BRANCH "hw-video-zero-copy";
 251       break;
 252     case nsIGfxInfo::FEATURE_WEBRENDER_SHADER_CACHE:
 253       name = BLOCKLIST_PREF_BRANCH "webrender.program-binary-disk";
 254       break;
 255     case nsIGfxInfo::FEATURE_WEBRENDER_PARTIAL_PRESENT:
 256       name = BLOCKLIST_PREF_BRANCH "webrender.partial-present";
 257       break;
 258     case nsIGfxInfo::FEATURE_DMABUF_SURFACE_EXPORT:
 259       name = BLOCKLIST_PREF_BRANCH "dmabuf.surface-export";
 260       break;
 261     case nsIGfxInfo::FEATURE_REUSE_DECODER_DEVICE:
 262       name = BLOCKLIST_PREF_BRANCH "reuse-decoder-device";
 263       break;
 264     case nsIGfxInfo::FEATURE_BACKDROP_FILTER:
 265       name = BLOCKLIST_PREF_BRANCH "backdrop.filter";
 266       break;
 267     case nsIGfxInfo::FEATURE_ACCELERATED_CANVAS2D:
 268       name = BLOCKLIST_PREF_BRANCH "accelerated-canvas2d";
 269       break;
 270     case nsIGfxInfo::FEATURE_H264_HW_DECODE:
 271       name = BLOCKLIST_PREF_BRANCH "h264.hw-decode";
 272       break;
 273     case nsIGfxInfo::FEATURE_AV1_HW_DECODE:
 274       name = BLOCKLIST_PREF_BRANCH "av1.hw-decode";
 275       break;
 276     case nsIGfxInfo::FEATURE_VIDEO_SOFTWARE_OVERLAY:
 277       name = BLOCKLIST_PREF_BRANCH "video-software-overlay";
 278       break;
 279     case nsIGfxInfo::FEATURE_WEBGL_USE_HARDWARE:
 280       name = BLOCKLIST_PREF_BRANCH "webgl-use-hardware";
 281       break;
 282     case nsIGfxInfo::FEATURE_OVERLAY_VP_AUTO_HDR:
 283       name = BLOCKLIST_PREF_BRANCH "overlay-vp-auto-hdr";
 284       break;
 285     case nsIGfxInfo::FEATURE_OVERLAY_VP_SUPER_RESOLUTION:
 286       name = BLOCKLIST_PREF_BRANCH "overlay-vp-super-resolution";
 287       break;
 288     default:
 289       MOZ_ASSERT_UNREACHABLE("Unexpected nsIGfxInfo feature?!");
 290       break;
 291   }
 292
 293   return name;
 294 }
 295
 296 // Returns the value of the pref for the relevant feature in aValue.
 297 // If the pref doesn't exist, aValue is not touched, and returns false.
 298 static bool GetPrefValueForFeature(int32_t aFeature, int32_t& aValue,
 299                                    nsACString& aFailureId) {
 300   const char* prefname = GetPrefNameForFeature(aFeature);
 301   if (!prefname) return false;
 302
 303   aValue = nsIGfxInfo::FEATURE_STATUS_UNKNOWN;
 304   if (!NS_SUCCEEDED(Preferences::GetInt(prefname, &aValue))) {
 305     return false;
 306   }
 307
 308   if (aValue == nsIGfxInfo::FEATURE_DENIED) {
 309     // We should never see the DENIED status with the downloadable blocklist.
 310     return false;
 311   }
 312
 313   nsCString failureprefname(prefname);
 314   failureprefname += ".failureid";
 315   nsAutoCString failureValue;
 316   nsresult rv = Preferences::GetCString(failureprefname.get(), failureValue);
 317   if (NS_SUCCEEDED(rv)) {
 318     aFailureId = failureValue.get();
 319   } else {
 320     aFailureId = "FEATURE_FAILURE_BLOCKLIST_PREF";
 321   }
 322
 323   return true;
 324 }
 325
 326 static void SetPrefValueForFeature(int32_t aFeature, int32_t aValue,
 327                                    const nsACString& aFailureId) {
 328   const char* prefname = GetPrefNameForFeature(aFeature);
 329   if (!prefname) return;
 330   if (XRE_IsParentProcess()) {
 331     GfxInfoBase::sFeatureStatus = nullptr;
 332   }
 333
 334   Preferences::SetInt(prefname, aValue);
 335   if (!aFailureId.IsEmpty()) {
 336     nsAutoCString failureprefname(prefname);
 337     failureprefname += ".failureid";
 338     Preferences::SetCString(failureprefname.get(), aFailureId);
 339   }
 340 }
 341
 342 static void RemovePrefForFeature(int32_t aFeature) {
 343   const char* prefname = GetPrefNameForFeature(aFeature);
 344   if (!prefname) return;
 345
 346   if (XRE_IsParentProcess()) {
 347     GfxInfoBase::sFeatureStatus = nullptr;
 348   }
 349   Preferences::ClearUser(prefname);
 350 }
 351
 352 static bool GetPrefValueForDriverVersion(nsCString& aVersion) {
 353   return NS_SUCCEEDED(
 354       Preferences::GetCString(SUGGESTED_VERSION_PREF, aVersion));
 355 }
 356
 357 static void SetPrefValueForDriverVersion(const nsAString& aVersion) {
 358   Preferences::SetString(SUGGESTED_VERSION_PREF, aVersion);
 359 }
 360
 361 static void RemovePrefForDriverVersion() {
 362   Preferences::ClearUser(SUGGESTED_VERSION_PREF);
 363 }
 364
 365 static OperatingSystem BlocklistOSToOperatingSystem(const nsAString& os) {
 366   if (os.EqualsLiteral("WINNT 6.1")) {
 367     return OperatingSystem::Windows7;
 368   }
 369   if (os.EqualsLiteral("WINNT 6.2")) {
 370     return OperatingSystem::Windows8;
 371   }
 372   if (os.EqualsLiteral("WINNT 6.3")) {
 373     return OperatingSystem::Windows8_1;
 374   }
 375   if (os.EqualsLiteral("WINNT 10.0")) {
 376     return OperatingSystem::Windows10;
 377   }
 378   if (os.EqualsLiteral("Linux")) {
 379     return OperatingSystem::Linux;
 380   }
 381   if (os.EqualsLiteral("Darwin 9")) {
 382     return OperatingSystem::OSX10_5;
 383   }
 384   if (os.EqualsLiteral("Darwin 10")) {
 385     return OperatingSystem::OSX10_6;
 386   }
 387   if (os.EqualsLiteral("Darwin 11")) {
 388     return OperatingSystem::OSX10_7;
 389   }
 390   if (os.EqualsLiteral("Darwin 12")) {
 391     return OperatingSystem::OSX10_8;
 392   }
 393   if (os.EqualsLiteral("Darwin 13")) {
 394     return OperatingSystem::OSX10_9;
 395   }
 396   if (os.EqualsLiteral("Darwin 14")) {
 397     return OperatingSystem::OSX10_10;
 398   }
 399   if (os.EqualsLiteral("Darwin 15")) {
 400     return OperatingSystem::OSX10_11;
 401   }
 402   if (os.EqualsLiteral("Darwin 16")) {
 403     return OperatingSystem::OSX10_12;
 404   }
 405   if (os.EqualsLiteral("Darwin 17")) {
 406     return OperatingSystem::OSX10_13;
 407   }
 408   if (os.EqualsLiteral("Darwin 18")) {
 409     return OperatingSystem::OSX10_14;
 410   }
 411   if (os.EqualsLiteral("Darwin 19")) {
 412     return OperatingSystem::OSX10_15;
 413   }
 414   if (os.EqualsLiteral("Darwin 20")) {
 415     return OperatingSystem::OSX11_0;
 416   }
 417   if (os.EqualsLiteral("Android")) {
 418     return OperatingSystem::Android;
 419     // For historical reasons, "All" in blocklist means "All Windows"
 420   }
 421   if (os.EqualsLiteral("All")) {
 422     return OperatingSystem::Windows;
 423   }
 424   if (os.EqualsLiteral("Darwin")) {
 425     return OperatingSystem::OSX;
 426   }
 427
 428   return OperatingSystem::Unknown;
 429 }
 430
 431 static GfxDeviceFamily* BlocklistDevicesToDeviceFamily(
 432     nsTArray<nsCString>& devices) {
 433   if (devices.Length() == 0) return nullptr;
 434
 435   // For each device, get its device ID, and return a freshly-allocated
 436   // GfxDeviceFamily with the contents of that array.
 437   GfxDeviceFamily* deviceIds = new GfxDeviceFamily;
 438
 439   for (uint32_t i = 0; i < devices.Length(); ++i) {
 440     // We make sure we don't add any "empty" device entries to the array, so
 441     // we don't need to check if devices[i] is empty.
 442     deviceIds->Append(NS_ConvertUTF8toUTF16(devices[i]));
 443   }
 444
 445   return deviceIds;
 446 }
 447
 448 static int32_t BlocklistFeatureToGfxFeature(const nsAString& aFeature) {
 449   MOZ_ASSERT(!aFeature.IsEmpty());
 450   if (aFeature.EqualsLiteral("DIRECT2D")) {
 451     return nsIGfxInfo::FEATURE_DIRECT2D;
 452   }
 453   if (aFeature.EqualsLiteral("DIRECT3D_9_LAYERS")) {
 454     return nsIGfxInfo::FEATURE_DIRECT3D_9_LAYERS;
 455   }
 456   if (aFeature.EqualsLiteral("DIRECT3D_10_LAYERS")) {
 457     return nsIGfxInfo::FEATURE_DIRECT3D_10_LAYERS;
 458   }
 459   if (aFeature.EqualsLiteral("DIRECT3D_10_1_LAYERS")) {
 460     return nsIGfxInfo::FEATURE_DIRECT3D_10_1_LAYERS;
 461   }
 462   if (aFeature.EqualsLiteral("DIRECT3D_11_LAYERS")) {
 463     return nsIGfxInfo::FEATURE_DIRECT3D_11_LAYERS;
 464   }
 465   if (aFeature.EqualsLiteral("DIRECT3D_11_ANGLE")) {
 466     return nsIGfxInfo::FEATURE_DIRECT3D_11_ANGLE;
 467   }
 468   if (aFeature.EqualsLiteral("HARDWARE_VIDEO_DECODING")) {
 469     return nsIGfxInfo::FEATURE_HARDWARE_VIDEO_DECODING;
 470   }
 471   if (aFeature.EqualsLiteral("OPENGL_LAYERS")) {
 472     return nsIGfxInfo::FEATURE_OPENGL_LAYERS;
 473   }
 474   if (aFeature.EqualsLiteral("WEBGL_OPENGL")) {
 475     return nsIGfxInfo::FEATURE_WEBGL_OPENGL;
 476   }
 477   if (aFeature.EqualsLiteral("WEBGL_ANGLE")) {
 478     return nsIGfxInfo::FEATURE_WEBGL_ANGLE;
 479   }
 480   if (aFeature.EqualsLiteral("WEBGL_MSAA")) {
 481     return nsIGfxInfo::UNUSED_FEATURE_WEBGL_MSAA;
 482   }
 483   if (aFeature.EqualsLiteral("STAGEFRIGHT")) {
 484     return nsIGfxInfo::FEATURE_STAGEFRIGHT;
 485   }
 486   if (aFeature.EqualsLiteral("WEBRTC_HW_ACCELERATION_ENCODE")) {
 487     return nsIGfxInfo::FEATURE_WEBRTC_HW_ACCELERATION_ENCODE;
 488   }
 489   if (aFeature.EqualsLiteral("WEBRTC_HW_ACCELERATION_DECODE")) {
 490     return nsIGfxInfo::FEATURE_WEBRTC_HW_ACCELERATION_DECODE;
 491   }
 492   if (aFeature.EqualsLiteral("WEBRTC_HW_ACCELERATION_H264")) {
 493     return nsIGfxInfo::FEATURE_WEBRTC_HW_ACCELERATION_H264;
 494   }
 495   if (aFeature.EqualsLiteral("CANVAS2D_ACCELERATION")) {
 496     return nsIGfxInfo::FEATURE_CANVAS2D_ACCELERATION;
 497   }
 498   if (aFeature.EqualsLiteral("DX_INTEROP2")) {
 499     return nsIGfxInfo::FEATURE_DX_INTEROP2;
 500   }
 501   if (aFeature.EqualsLiteral("GPU_PROCESS")) {
 502     return nsIGfxInfo::FEATURE_GPU_PROCESS;
 503   }
 504   if (aFeature.EqualsLiteral("WEBGL2")) {
 505     return nsIGfxInfo::FEATURE_WEBGL2;
 506   }
 507   if (aFeature.EqualsLiteral("D3D11_KEYED_MUTEX")) {
 508     return nsIGfxInfo::FEATURE_D3D11_KEYED_MUTEX;
 509   }
 510   if (aFeature.EqualsLiteral("WEBRENDER")) {
 511     return nsIGfxInfo::FEATURE_WEBRENDER;
 512   }
 513   if (aFeature.EqualsLiteral("WEBRENDER_COMPOSITOR")) {
 514     return nsIGfxInfo::FEATURE_WEBRENDER_COMPOSITOR;
 515   }
 516   if (aFeature.EqualsLiteral("DX_NV12")) {
 517     return nsIGfxInfo::FEATURE_DX_NV12;
 518   }
 519   if (aFeature.EqualsLiteral("VP8_HW_DECODE")) {
 520     return nsIGfxInfo::FEATURE_VP8_HW_DECODE;
 521   }
 522   if (aFeature.EqualsLiteral("VP9_HW_DECODE")) {
 523     return nsIGfxInfo::FEATURE_VP9_HW_DECODE;
 524   }
 525   if (aFeature.EqualsLiteral("GL_SWIZZLE")) {
 526     return nsIGfxInfo::FEATURE_GL_SWIZZLE;
 527   }
 528   if (aFeature.EqualsLiteral("WEBRENDER_SCISSORED_CACHE_CLEARS")) {
 529     return nsIGfxInfo::FEATURE_WEBRENDER_SCISSORED_CACHE_CLEARS;
 530   }
 531   if (aFeature.EqualsLiteral("ALLOW_WEBGL_OUT_OF_PROCESS")) {
 532     return nsIGfxInfo::FEATURE_ALLOW_WEBGL_OUT_OF_PROCESS;
 533   }
 534   if (aFeature.EqualsLiteral("THREADSAFE_GL")) {
 535     return nsIGfxInfo::FEATURE_THREADSAFE_GL;
 536   }
 537   if (aFeature.EqualsLiteral("X11_EGL")) {
 538     return nsIGfxInfo::FEATURE_X11_EGL;
 539   }
 540   if (aFeature.EqualsLiteral("DMABUF")) {
 541     return nsIGfxInfo::FEATURE_DMABUF;
 542   }
 543   if (aFeature.EqualsLiteral("WEBGPU")) {
 544     return nsIGfxInfo::FEATURE_WEBGPU;
 545   }
 546   if (aFeature.EqualsLiteral("VIDEO_OVERLAY")) {
 547     return nsIGfxInfo::FEATURE_VIDEO_OVERLAY;
 548   }
 549   if (aFeature.EqualsLiteral("HW_DECODED_VIDEO_ZERO_COPY")) {
 550     return nsIGfxInfo::FEATURE_HW_DECODED_VIDEO_ZERO_COPY;
 551   }
 552   if (aFeature.EqualsLiteral("REUSE_DECODER_DEVICE")) {
 553     return nsIGfxInfo::FEATURE_REUSE_DECODER_DEVICE;
 554   }
 555   if (aFeature.EqualsLiteral("WEBRENDER_PARTIAL_PRESENT")) {
 556     return nsIGfxInfo::FEATURE_WEBRENDER_PARTIAL_PRESENT;
 557   }
 558   if (aFeature.EqualsLiteral("BACKDROP_FILTER")) {
 559     return nsIGfxInfo::FEATURE_BACKDROP_FILTER;
 560   }
 561   if (aFeature.EqualsLiteral("ACCELERATED_CANVAS2D")) {
 562     return nsIGfxInfo::FEATURE_ACCELERATED_CANVAS2D;
 563   }
 564   if (aFeature.EqualsLiteral("FEATURE_OVERLAY_VP_AUTO_HDR")) {
 565     return nsIGfxInfo::FEATURE_OVERLAY_VP_AUTO_HDR;
 566   }
 567   if (aFeature.EqualsLiteral("FEATURE_OVERLAY_VP_SUPER_RESOLUTION")) {
 568     return nsIGfxInfo::FEATURE_OVERLAY_VP_SUPER_RESOLUTION;
 569   }
 570   if (aFeature.EqualsLiteral("ALL")) {
 571     return GfxDriverInfo::allFeatures;
 572   }
 573   if (aFeature.EqualsLiteral("OPTIONAL")) {
 574     return GfxDriverInfo::optionalFeatures;
 575   }
 576
 577   // If we don't recognize the feature, it may be new, and something
 578   // this version doesn't understand.  So, nothing to do.  This is
 579   // different from feature not being specified at all, in which case
 580   // this method should not get called and we should continue with the
 581   // "optional features" blocklisting.
 582   return 0;
 583 }
 584
 585 static int32_t BlocklistFeatureStatusToGfxFeatureStatus(
 586     const nsAString& aStatus) {
 587   if (aStatus.EqualsLiteral("STATUS_OK")) {
 588     return nsIGfxInfo::FEATURE_STATUS_OK;
 589   }
 590   if (aStatus.EqualsLiteral("BLOCKED_DRIVER_VERSION")) {
 591     return nsIGfxInfo::FEATURE_BLOCKED_DRIVER_VERSION;
 592   }
 593   if (aStatus.EqualsLiteral("BLOCKED_DEVICE")) {
 594     return nsIGfxInfo::FEATURE_BLOCKED_DEVICE;
 595   }
 596   if (aStatus.EqualsLiteral("DISCOURAGED")) {
 597     return nsIGfxInfo::FEATURE_DISCOURAGED;
 598   }
 599   if (aStatus.EqualsLiteral("BLOCKED_OS_VERSION")) {
 600     return nsIGfxInfo::FEATURE_BLOCKED_OS_VERSION;
 601   }
 602   if (aStatus.EqualsLiteral("DENIED")) {
 603     return nsIGfxInfo::FEATURE_DENIED;
 604   }
 605   if (aStatus.EqualsLiteral("ALLOW_QUALIFIED")) {
 606     return nsIGfxInfo::FEATURE_ALLOW_QUALIFIED;
 607   }
 608   if (aStatus.EqualsLiteral("ALLOW_ALWAYS")) {
 609     return nsIGfxInfo::FEATURE_ALLOW_ALWAYS;
 610   }
 611
 612   // Do not allow it to set STATUS_UNKNOWN.  Also, we are not
 613   // expecting the "mismatch" status showing up here.
 614
 615   return nsIGfxInfo::FEATURE_STATUS_OK;
 616 }
 617
 618 static VersionComparisonOp BlocklistComparatorToComparisonOp(
 619     const nsAString& op) {
 620   if (op.EqualsLiteral("LESS_THAN")) {
 621     return DRIVER_LESS_THAN;
 622   }
 623   if (op.EqualsLiteral("BUILD_ID_LESS_THAN")) {
 624     return DRIVER_BUILD_ID_LESS_THAN;
 625   }
 626   if (op.EqualsLiteral("LESS_THAN_OR_EQUAL")) {
 627     return DRIVER_LESS_THAN_OR_EQUAL;
 628   }
 629   if (op.EqualsLiteral("BUILD_ID_LESS_THAN_OR_EQUAL")) {
 630     return DRIVER_BUILD_ID_LESS_THAN_OR_EQUAL;
 631   }
 632   if (op.EqualsLiteral("GREATER_THAN")) {
 633     return DRIVER_GREATER_THAN;
 634   }
 635   if (op.EqualsLiteral("GREATER_THAN_OR_EQUAL")) {
 636     return DRIVER_GREATER_THAN_OR_EQUAL;
 637   }
 638   if (op.EqualsLiteral("EQUAL")) {
 639     return DRIVER_EQUAL;
 640   }
 641   if (op.EqualsLiteral("NOT_EQUAL")) {
 642     return DRIVER_NOT_EQUAL;
 643   }
 644   if (op.EqualsLiteral("BETWEEN_EXCLUSIVE")) {
 645     return DRIVER_BETWEEN_EXCLUSIVE;
 646   }
 647   if (op.EqualsLiteral("BETWEEN_INCLUSIVE")) {
 648     return DRIVER_BETWEEN_INCLUSIVE;
 649   }
 650   if (op.EqualsLiteral("BETWEEN_INCLUSIVE_START")) {
 651     return DRIVER_BETWEEN_INCLUSIVE_START;
 652   }
 653
 654   return DRIVER_COMPARISON_IGNORED;
 655 }
 656
 657 /*
 658   Deserialize Blocklist entries from string.
 659   e.g:
 660   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
 661 */
 662 static bool BlocklistEntryToDriverInfo(const nsACString& aBlocklistEntry,
 663                                        GfxDriverInfo& aDriverInfo) {
 664   // If we get an application version to be zero, something is not working
 665   // and we are not going to bother checking the blocklist versions.
 666   // See TestGfxWidgets.cpp for how version comparison works.
 667   // <versionRange minVersion="42.0a1" maxVersion="45.0"></versionRange>
 668   static mozilla::Version zeroV("0");
 669   static mozilla::Version appV(GfxInfoBase::GetApplicationVersion().get());
 670   if (appV <= zeroV) {
 671     gfxCriticalErrorOnce(gfxCriticalError::DefaultOptions(false))
 672         << "Invalid application version "
 673         << GfxInfoBase::GetApplicationVersion().get();
 674   }
 675
 676   aDriverInfo.mRuleId = "FEATURE_FAILURE_DL_BLOCKLIST_NO_ID"_ns;
 677
 678   for (const auto& keyValue : aBlocklistEntry.Split('\t')) {
 679     nsTArray<nsCString> splitted;
 680     ParseString(keyValue, ':', splitted);
 681     if (splitted.Length() != 2) {
 682       // If we don't recognize the input data, we do not want to proceed.
 683       gfxCriticalErrorOnce(CriticalLog::DefaultOptions(false))
 684           << "Unrecognized data " << nsCString(keyValue).get();
 685       return false;
 686     }
 687     const nsCString& key = splitted[0];
 688     const nsCString& value = splitted[1];
 689     NS_ConvertUTF8toUTF16 dataValue(value);
 690
 691     if (value.Length() == 0) {
 692       // Safety check for empty values.
 693       gfxCriticalErrorOnce(CriticalLog::DefaultOptions(false))
 694           << "Empty value for " << key.get();
 695       return false;
 696     }
 697
 698     if (key.EqualsLiteral("blockID")) {
 699       nsCString blockIdStr = "FEATURE_FAILURE_DL_BLOCKLIST_"_ns + value;
 700       aDriverInfo.mRuleId = blockIdStr.get();
 701     } else if (key.EqualsLiteral("os")) {
 702       aDriverInfo.mOperatingSystem = BlocklistOSToOperatingSystem(dataValue);
 703     } else if (key.EqualsLiteral("osversion")) {
 704       aDriverInfo.mOperatingSystemVersion = strtoul(value.get(), nullptr, 10);
 705     } else if (key.EqualsLiteral("windowProtocol")) {
 706       aDriverInfo.mWindowProtocol = dataValue;
 707     } else if (key.EqualsLiteral("vendor")) {
 708       aDriverInfo.mAdapterVendor = dataValue;
 709     } else if (key.EqualsLiteral("driverVendor")) {
 710       aDriverInfo.mDriverVendor = dataValue;
 711     } else if (key.EqualsLiteral("feature")) {
 712       aDriverInfo.mFeature = BlocklistFeatureToGfxFeature(dataValue);
 713       if (aDriverInfo.mFeature == 0) {
 714         // If we don't recognize the feature, we do not want to proceed.
 715         gfxWarning() << "Unrecognized feature " << value.get();
 716         return false;
 717       }
 718     } else if (key.EqualsLiteral("featureStatus")) {
 719       aDriverInfo.mFeatureStatus =
 720           BlocklistFeatureStatusToGfxFeatureStatus(dataValue);
 721     } else if (key.EqualsLiteral("driverVersion")) {
 722       uint64_t version;
 723       if (ParseDriverVersion(dataValue, &version))
 724         aDriverInfo.mDriverVersion = version;
 725     } else if (key.EqualsLiteral("driverVersionMax")) {
 726       uint64_t version;
 727       if (ParseDriverVersion(dataValue, &version))
 728         aDriverInfo.mDriverVersionMax = version;
 729     } else if (key.EqualsLiteral("driverVersionComparator")) {
 730       aDriverInfo.mComparisonOp = BlocklistComparatorToComparisonOp(dataValue);
 731     } else if (key.EqualsLiteral("model")) {
 732       aDriverInfo.mModel = dataValue;
 733     } else if (key.EqualsLiteral("product")) {
 734       aDriverInfo.mProduct = dataValue;
 735     } else if (key.EqualsLiteral("manufacturer")) {
 736       aDriverInfo.mManufacturer = dataValue;
 737     } else if (key.EqualsLiteral("hardware")) {
 738       aDriverInfo.mHardware = dataValue;
 739     } else if (key.EqualsLiteral("versionRange")) {
 740       nsTArray<nsCString> versionRange;
 741       ParseString(value, ',', versionRange);
 742       if (versionRange.Length() != 2) {
 743         gfxCriticalErrorOnce(CriticalLog::DefaultOptions(false))
 744             << "Unrecognized versionRange " << value.get();
 745         return false;
 746       }
 747       const nsCString& minValue = versionRange[0];
 748       const nsCString& maxValue = versionRange[1];
 749
 750       mozilla::Version minV(minValue.get());
 751       mozilla::Version maxV(maxValue.get());
 752
 753       if (minV > zeroV && !(appV >= minV)) {
 754         // The version of the application is less than the minimal version
 755         // this blocklist entry applies to, so we can just ignore it by
 756         // returning false and letting the caller deal with it.
 757         return false;
 758       }
 759       if (maxV > zeroV && !(appV <= maxV)) {
 760         // The version of the application is more than the maximal version
 761         // this blocklist entry applies to, so we can just ignore it by
 762         // returning false and letting the caller deal with it.
 763         return false;
 764       }
 765     } else if (key.EqualsLiteral("devices")) {
 766       nsTArray<nsCString> devices;
 767       ParseString(value, ',', devices);
 768       GfxDeviceFamily* deviceIds = BlocklistDevicesToDeviceFamily(devices);
 769       if (deviceIds) {
 770         // Get GfxDriverInfo to adopt the devices array we created.
 771         aDriverInfo.mDeleteDevices = true;
 772         aDriverInfo.mDevices = deviceIds;
 773       }
 774     }
 775     // We explicitly ignore unknown elements.
 776   }
 777
 778   return true;
 779 }
 780
 781 NS_IMETHODIMP
 782 GfxInfoBase::Observe(nsISupports* aSubject, const char* aTopic,
 783                      const char16_t* aData) {
 784   if (strcmp(aTopic, "blocklist-data-gfxItems") == 0) {
 785     nsTArray<GfxDriverInfo> driverInfo;
 786     NS_ConvertUTF16toUTF8 utf8Data(aData);
 787
 788     for (const auto& blocklistEntry : utf8Data.Split('\n')) {
 789       GfxDriverInfo di;
 790       if (BlocklistEntryToDriverInfo(blocklistEntry, di)) {
 791         // XXX Changing this to driverInfo.AppendElement(di) causes leaks.
 792         // Probably some non-standard semantics of the copy/move operations?
 793         *driverInfo.AppendElement() = di;
 794         // Prevent di falling out of scope from destroying the devices.
 795         di.mDeleteDevices = false;
 796       } else {
 797         driverInfo.AppendElement();
 798       }
 799     }
 800
 801     EvaluateDownloadedBlocklist(driverInfo);
 802   }
 803
 804   return NS_OK;
 805 }
 806
 807 GfxInfoBase::GfxInfoBase() : mScreenPixels(INT64_MAX), mMutex("GfxInfoBase") {}
 808
 809 GfxInfoBase::~GfxInfoBase() = default;
 810
 811 nsresult GfxInfoBase::Init() {
 812   InitGfxDriverInfoShutdownObserver();
 813
 814   nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
 815   if (os) {
 816     os->AddObserver(this, "blocklist-data-gfxItems", true);
 817   }
 818
 819   return NS_OK;
 820 }
 821
 822 void GfxInfoBase::GetData() {
 823   if (mScreenPixels != INT64_MAX) {
 824     // Already initialized.
 825     return;
 826   }
 827
 828   ScreenManager::GetSingleton().GetTotalScreenPixels(&mScreenPixels);
 829 }
 830
 831 NS_IMETHODIMP
 832 GfxInfoBase::GetFeatureStatus(int32_t aFeature, nsACString& aFailureId,
 833                               int32_t* aStatus) {
 834   // Ignore the gfx.blocklist.all pref on release and beta.
 835 #if defined(RELEASE_OR_BETA)
 836   int32_t blocklistAll = 0;
 837 #else
 838   int32_t blocklistAll = StaticPrefs::gfx_blocklist_all_AtStartup();
 839 #endif
 840   if (blocklistAll > 0) {
 841     gfxCriticalErrorOnce(gfxCriticalError::DefaultOptions(false))
 842         << "Forcing blocklisting all features";
 843     *aStatus = FEATURE_BLOCKED_DEVICE;
 844     aFailureId = "FEATURE_FAILURE_BLOCK_ALL";
 845     return NS_OK;
 846   }
 847
 848   if (blocklistAll < 0) {
 849     gfxCriticalErrorOnce(gfxCriticalError::DefaultOptions(false))
 850         << "Ignoring any feature blocklisting.";
 851     *aStatus = FEATURE_STATUS_OK;
 852     return NS_OK;
 853   }
 854
 855   // This is how we evaluate the downloadable blocklist. If there is no pref,
 856   // then we will fallback to checking the static blocklist.
 857   if (GetPrefValueForFeature(aFeature, *aStatus, aFailureId)) {
 858     return NS_OK;
 859   }
 860
 861   if (XRE_IsContentProcess() || XRE_IsGPUProcess()) {
 862     // Use the cached data received from the parent process.
 863     MOZ_ASSERT(sFeatureStatus);
 864     bool success = false;
 865     for (const auto& fs : *sFeatureStatus) {
 866       if (fs.feature() == aFeature) {
 867         aFailureId = fs.failureId();
 868         *aStatus = fs.status();
 869         success = true;
 870         break;
 871       }
 872     }
 873     return success ? NS_OK : NS_ERROR_FAILURE;
 874   }
 875
 876   nsString version;
 877   nsTArray<GfxDriverInfo> driverInfo;
 878   nsresult rv =
 879       GetFeatureStatusImpl(aFeature, aStatus, version, driverInfo, aFailureId);
 880   return rv;
 881 }
 882
 883 nsTArray<gfx::GfxInfoFeatureStatus> GfxInfoBase::GetAllFeatures() {
 884   MOZ_RELEASE_ASSERT(XRE_IsParentProcess());
 885   if (!sFeatureStatus) {
 886     InitFeatureStatus(new nsTArray<gfx::GfxInfoFeatureStatus>());
 887     for (int32_t i = 1; i <= nsIGfxInfo::FEATURE_MAX_VALUE; ++i) {
 888       int32_t status = 0;
 889       nsAutoCString failureId;
 890       GetFeatureStatus(i, failureId, &status);
 891       gfx::GfxInfoFeatureStatus gfxFeatureStatus;
 892       gfxFeatureStatus.feature() = i;
 893       gfxFeatureStatus.status() = status;
 894       gfxFeatureStatus.failureId() = failureId;
 895       sFeatureStatus->AppendElement(gfxFeatureStatus);
 896     }
 897   }
 898
 899   nsTArray<gfx::GfxInfoFeatureStatus> features;
 900   for (const auto& status : *sFeatureStatus) {
 901     gfx::GfxInfoFeatureStatus copy = status;
 902     features.AppendElement(copy);
 903   }
 904   return features;
 905 }
 906
 907 inline bool MatchingAllowStatus(int32_t aStatus) {
 908   switch (aStatus) {
 909     case nsIGfxInfo::FEATURE_ALLOW_ALWAYS:
 910     case nsIGfxInfo::FEATURE_ALLOW_QUALIFIED:
 911       return true;
 912     default:
 913       return false;
 914   }
 915 }
 916
 917 // Matching OS go somewhat beyond the simple equality check because of the
 918 // "All Windows" and "All OS X" variations.
 919 //
 920 // aBlockedOS is describing the system(s) we are trying to block.
 921 // aSystemOS is describing the system we are running on.
 922 //
 923 // aSystemOS should not be "Windows" or "OSX" - it should be set to
 924 // a particular version instead.
 925 // However, it is valid for aBlockedOS to be one of those generic values,
 926 // as we could be blocking all of the versions.
 927 inline bool MatchingOperatingSystems(OperatingSystem aBlockedOS,
 928                                      OperatingSystem aSystemOS,
 929                                      uint32_t aSystemOSBuild) {
 930   MOZ_ASSERT(aSystemOS != OperatingSystem::Windows &&
 931              aSystemOS != OperatingSystem::OSX);
 932
 933   // If the block entry OS is unknown, it doesn't match
 934   if (aBlockedOS == OperatingSystem::Unknown) {
 935     return false;
 936   }
 937
 938 #if defined(XP_WIN)
 939   if (aBlockedOS == OperatingSystem::Windows) {
 940     // We do want even "unknown" aSystemOS to fall under "all windows"
 941     return true;
 942   }
 943
 944   constexpr uint32_t kMinWin10BuildNumber = 18362;
 945   if (aBlockedOS == OperatingSystem::RecentWindows10 &&
 946       aSystemOS == OperatingSystem::Windows10) {
 947     // For allowlist purposes, we sometimes want to restrict to only recent
 948     // versions of Windows 10. This is a bit of a kludge but easier than adding
 949     // complicated blocklist infrastructure for build ID comparisons like driver
 950     // versions.
 951     return aSystemOSBuild >= kMinWin10BuildNumber;
 952   }
 953
 954   if (aBlockedOS == OperatingSystem::NotRecentWindows10) {
 955     if (aSystemOS == OperatingSystem::Windows10) {
 956       return aSystemOSBuild < kMinWin10BuildNumber;
 957     } else {
 958       return true;
 959     }
 960   }
 961 #endif
 962
 963 #if defined(XP_MACOSX)
 964   if (aBlockedOS == OperatingSystem::OSX) {
 965     // We do want even "unknown" aSystemOS to fall under "all OS X"
 966     return true;
 967   }
 968 #endif
 969
 970   return aSystemOS == aBlockedOS;
 971 }
 972
 973 inline bool MatchingBattery(BatteryStatus aBatteryStatus, bool aHasBattery) {
 974   switch (aBatteryStatus) {
 975     case BatteryStatus::All:
 976       return true;
 977     case BatteryStatus::None:
 978       return !aHasBattery;
 979     case BatteryStatus::Present:
 980       return aHasBattery;
 981   }
 982
 983   MOZ_ASSERT_UNREACHABLE("bad battery status");
 984   return false;
 985 }
 986
 987 inline bool MatchingScreenSize(ScreenSizeStatus aScreenStatus,
 988                                int64_t aScreenPixels) {
 989   constexpr int64_t kMaxSmallPixels = 2304000;   // 1920x1200
 990   constexpr int64_t kMaxMediumPixels = 4953600;  // 3440x1440
 991
 992   switch (aScreenStatus) {
 993     case ScreenSizeStatus::All:
 994       return true;
 995     case ScreenSizeStatus::Small:
 996       return aScreenPixels <= kMaxSmallPixels;
 997     case ScreenSizeStatus::SmallAndMedium:
 998       return aScreenPixels <= kMaxMediumPixels;
 999     case ScreenSizeStatus::Medium:
1000       return aScreenPixels > kMaxSmallPixels &&
1001              aScreenPixels <= kMaxMediumPixels;
1002     case ScreenSizeStatus::MediumAndLarge:
1003       return aScreenPixels > kMaxSmallPixels;
1004     case ScreenSizeStatus::Large:
1005       return aScreenPixels > kMaxMediumPixels;
1006   }
1007
1008   MOZ_ASSERT_UNREACHABLE("bad screen status");
1009   return false;
1010 }
1011
1012 int32_t GfxInfoBase::FindBlocklistedDeviceInList(
1013     const nsTArray<GfxDriverInfo>& info, nsAString& aSuggestedVersion,
1014     int32_t aFeature, nsACString& aFailureId, OperatingSystem os,
1015     bool aForAllowing) {
1016   int32_t status = nsIGfxInfo::FEATURE_STATUS_UNKNOWN;
1017
1018   // Some properties are not available on all platforms.
1019   nsAutoString windowProtocol;
1020   nsresult rv = GetWindowProtocol(windowProtocol);
1021   if (NS_FAILED(rv) && rv != NS_ERROR_NOT_IMPLEMENTED) {
1022     return 0;
1023   }
1024
1025   bool hasBattery = false;
1026   rv = GetHasBattery(&hasBattery);
1027   if (NS_FAILED(rv) && rv != NS_ERROR_NOT_IMPLEMENTED) {
1028     return 0;
1029   }
1030
1031   uint32_t osBuild = OperatingSystemBuild();
1032
1033   // Get the adapters once then reuse below
1034   nsAutoString adapterVendorID[2];
1035   nsAutoString adapterDeviceID[2];
1036   nsAutoString adapterDriverVendor[2];
1037   nsAutoString adapterDriverVersionString[2];
1038   bool adapterInfoFailed[2];
1039
1040   adapterInfoFailed[0] =
1041       (NS_FAILED(GetAdapterVendorID(adapterVendorID[0])) ||
1042        NS_FAILED(GetAdapterDeviceID(adapterDeviceID[0])) ||
1043        NS_FAILED(GetAdapterDriverVendor(adapterDriverVendor[0])) ||
1044        NS_FAILED(GetAdapterDriverVersion(adapterDriverVersionString[0])));
1045   adapterInfoFailed[1] =
1046       (NS_FAILED(GetAdapterVendorID2(adapterVendorID[1])) ||
1047        NS_FAILED(GetAdapterDeviceID2(adapterDeviceID[1])) ||
1048        NS_FAILED(GetAdapterDriverVendor2(adapterDriverVendor[1])) ||
1049        NS_FAILED(GetAdapterDriverVersion2(adapterDriverVersionString[1])));
1050   // No point in going on if we don't have adapter info
1051   if (adapterInfoFailed[0] && adapterInfoFailed[1]) {
1052     return 0;
1053   }
1054
1055 #if defined(XP_WIN) || defined(ANDROID) || defined(MOZ_WIDGET_GTK)
1056   uint64_t driverVersion[2] = {0, 0};
1057   if (!adapterInfoFailed[0]) {
1058     ParseDriverVersion(adapterDriverVersionString[0], &driverVersion[0]);
1059   }
1060   if (!adapterInfoFailed[1]) {
1061     ParseDriverVersion(adapterDriverVersionString[1], &driverVersion[1]);
1062   }
1063 #endif
1064
1065   uint32_t i = 0;
1066   for (; i < info.Length(); i++) {
1067     // If the status is FEATURE_ALLOW_*, then it is for the allowlist, not
1068     // blocklisting. Only consider entries for our search mode.
1069     if (MatchingAllowStatus(info[i].mFeatureStatus) != aForAllowing) {
1070       continue;
1071     }
1072
1073     // If we don't have the info for this GPU, no need to check further.
1074     // It is unclear that we would ever have a mixture of 1st and 2nd
1075     // GPU, but leaving the code in for that possibility for now.
1076     // (Actually, currently mGpu2 will never be true, so this can
1077     // be optimized out.)
1078     uint32_t infoIndex = info[i].mGpu2 ? 1 : 0;
1079     if (adapterInfoFailed[infoIndex]) {
1080       continue;
1081     }
1082
1083     // Do the operating system check first, no point in getting the driver
1084     // info if we won't need to use it.
1085     if (!MatchingOperatingSystems(info[i].mOperatingSystem, os, osBuild)) {
1086       continue;
1087     }
1088
1089     if (info[i].mOperatingSystemVersion &&
1090         info[i].mOperatingSystemVersion != OperatingSystemVersion()) {
1091       continue;
1092     }
1093
1094     if (!MatchingBattery(info[i].mBattery, hasBattery)) {
1095       continue;
1096     }
1097
1098     if (!MatchingScreenSize(info[i].mScreen, mScreenPixels)) {
1099       continue;
1100     }
1101
1102     if (!DoesWindowProtocolMatch(info[i].mWindowProtocol, windowProtocol)) {
1103       continue;
1104     }
1105
1106     if (!DoesVendorMatch(info[i].mAdapterVendor, adapterVendorID[infoIndex])) {
1107       continue;
1108     }
1109
1110     if (!DoesDriverVendorMatch(info[i].mDriverVendor,
1111                                adapterDriverVendor[infoIndex])) {
1112       continue;
1113     }
1114
1115     if (info[i].mDevices && !info[i].mDevices->IsEmpty()) {
1116       nsresult rv = info[i].mDevices->Contains(adapterDeviceID[infoIndex]);
1117       if (rv == NS_ERROR_NOT_AVAILABLE) {
1118         // Not found
1119         continue;
1120       }
1121       if (rv != NS_OK) {
1122         // Failed to search, allowlist should not match, blocklist should match
1123         // for safety reasons
1124         if (aForAllowing) {
1125           continue;
1126         }
1127         break;
1128       }
1129     }
1130
1131     bool match = false;
1132
1133     if (!info[i].mHardware.IsEmpty() && !info[i].mHardware.Equals(Hardware())) {
1134       continue;
1135     }
1136     if (!info[i].mModel.IsEmpty() && !info[i].mModel.Equals(Model())) {
1137       continue;
1138     }
1139     if (!info[i].mProduct.IsEmpty() && !info[i].mProduct.Equals(Product())) {
1140       continue;
1141     }
1142     if (!info[i].mManufacturer.IsEmpty() &&
1143         !info[i].mManufacturer.Equals(Manufacturer())) {
1144       continue;
1145     }
1146
1147 #if defined(XP_WIN) || defined(ANDROID) || defined(MOZ_WIDGET_GTK)
1148     switch (info[i].mComparisonOp) {
1149       case DRIVER_LESS_THAN:
1150         match = driverVersion[infoIndex] < info[i].mDriverVersion;
1151         break;
1152       case DRIVER_BUILD_ID_LESS_THAN:
1153         match = (driverVersion[infoIndex] & 0xFFFF) < info[i].mDriverVersion;
1154         break;
1155       case DRIVER_LESS_THAN_OR_EQUAL:
1156         match = driverVersion[infoIndex] <= info[i].mDriverVersion;
1157         break;
1158       case DRIVER_BUILD_ID_LESS_THAN_OR_EQUAL:
1159         match = (driverVersion[infoIndex] & 0xFFFF) <= info[i].mDriverVersion;
1160         break;
1161       case DRIVER_GREATER_THAN:
1162         match = driverVersion[infoIndex] > info[i].mDriverVersion;
1163         break;
1164       case DRIVER_GREATER_THAN_OR_EQUAL:
1165         match = driverVersion[infoIndex] >= info[i].mDriverVersion;
1166         break;
1167       case DRIVER_EQUAL:
1168         match = driverVersion[infoIndex] == info[i].mDriverVersion;
1169         break;
1170       case DRIVER_NOT_EQUAL:
1171         match = driverVersion[infoIndex] != info[i].mDriverVersion;
1172         break;
1173       case DRIVER_BETWEEN_EXCLUSIVE:
1174         match = driverVersion[infoIndex] > info[i].mDriverVersion &&
1175                 driverVersion[infoIndex] < info[i].mDriverVersionMax;
1176         break;
1177       case DRIVER_BETWEEN_INCLUSIVE:
1178         match = driverVersion[infoIndex] >= info[i].mDriverVersion &&
1179                 driverVersion[infoIndex] <= info[i].mDriverVersionMax;
1180         break;
1181       case DRIVER_BETWEEN_INCLUSIVE_START:
1182         match = driverVersion[infoIndex] >= info[i].mDriverVersion &&
1183                 driverVersion[infoIndex] < info[i].mDriverVersionMax;
1184         break;
1185       case DRIVER_COMPARISON_IGNORED:
1186         // We don't have a comparison op, so we match everything.
1187         match = true;
1188         break;
1189       default:
1190         NS_WARNING("Bogus op in GfxDriverInfo");
1191         break;
1192     }
1193 #else
1194     // We don't care what driver version it was. We only check OS version and if
1195     // the device matches.
1196     match = true;
1197 #endif
1198
1199     if (match || info[i].mDriverVersion == GfxDriverInfo::allDriverVersions) {
1200       if (info[i].mFeature == GfxDriverInfo::allFeatures ||
1201           info[i].mFeature == aFeature ||
1202           (info[i].mFeature == GfxDriverInfo::optionalFeatures &&
1203            OnlyAllowFeatureOnKnownConfig(aFeature))) {
1204         status = info[i].mFeatureStatus;
1205         if (!info[i].mRuleId.IsEmpty()) {
1206           aFailureId = info[i].mRuleId.get();
1207         } else {
1208           aFailureId = "FEATURE_FAILURE_DL_BLOCKLIST_NO_ID";
1209         }
1210         break;
1211       }
1212     }
1213   }
1214
1215 #if defined(XP_WIN)
1216   // As a very special case, we block D2D on machines with an NVidia 310M GPU
1217   // as either the primary or secondary adapter.  D2D is also blocked when the
1218   // NV 310M is the primary adapter (using the standard blocklisting mechanism).
1219   // If the primary GPU already matched something in the blocklist then we
1220   // ignore this special rule.  See bug 1008759.
1221   if (status == nsIGfxInfo::FEATURE_STATUS_UNKNOWN &&
1222       (aFeature == nsIGfxInfo::FEATURE_DIRECT2D)) {
1223     if (!adapterInfoFailed[1]) {
1224       nsAString& nvVendorID =
1225           (nsAString&)GfxDriverInfo::GetDeviceVendor(DeviceVendor::NVIDIA);
1226       const nsString nv310mDeviceId = u"0x0A70"_ns;
1227       if (nvVendorID.Equals(adapterVendorID[1],
1228                             nsCaseInsensitiveStringComparator) &&
1229           nv310mDeviceId.Equals(adapterDeviceID[1],
1230                                 nsCaseInsensitiveStringComparator)) {
1231         status = nsIGfxInfo::FEATURE_BLOCKED_DEVICE;
1232         aFailureId = "FEATURE_FAILURE_D2D_NV310M_BLOCK";
1233       }
1234     }
1235   }
1236
1237   // Depends on Windows driver versioning. We don't pass a GfxDriverInfo object
1238   // back to the Windows handler, so we must handle this here.
1239   if (status == FEATURE_BLOCKED_DRIVER_VERSION) {
1240     if (info[i].mSuggestedVersion) {
1241       aSuggestedVersion.AppendPrintf("%s", info[i].mSuggestedVersion);
1242     } else if (info[i].mComparisonOp == DRIVER_LESS_THAN &&
1243                info[i].mDriverVersion != GfxDriverInfo::allDriverVersions) {
1244       aSuggestedVersion.AppendPrintf(
1245           "%lld.%lld.%lld.%lld",
1246           (info[i].mDriverVersion & 0xffff000000000000) >> 48,
1247           (info[i].mDriverVersion & 0x0000ffff00000000) >> 32,
1248           (info[i].mDriverVersion & 0x00000000ffff0000) >> 16,
1249           (info[i].mDriverVersion & 0x000000000000ffff));
1250     }
1251   }
1252 #endif
1253
1254   return status;
1255 }
1256
1257 void GfxInfoBase::SetFeatureStatus(nsTArray<gfx::GfxInfoFeatureStatus>&& aFS) {
1258   MOZ_ASSERT(!sFeatureStatus);
1259   InitFeatureStatus(new nsTArray<gfx::GfxInfoFeatureStatus>(std::move(aFS)));
1260 }
1261
1262 bool GfxInfoBase::DoesWindowProtocolMatch(
1263     const nsAString& aBlocklistWindowProtocol,
1264     const nsAString& aWindowProtocol) {
1265   return aBlocklistWindowProtocol.Equals(aWindowProtocol,
1266                                          nsCaseInsensitiveStringComparator) ||
1267          aBlocklistWindowProtocol.Equals(
1268              GfxDriverInfo::GetWindowProtocol(WindowProtocol::All),
1269              nsCaseInsensitiveStringComparator);
1270 }
1271
1272 bool GfxInfoBase::DoesVendorMatch(const nsAString& aBlocklistVendor,
1273                                   const nsAString& aAdapterVendor) {
1274   return aBlocklistVendor.Equals(aAdapterVendor,
1275                                  nsCaseInsensitiveStringComparator) ||
1276          aBlocklistVendor.Equals(
1277              GfxDriverInfo::GetDeviceVendor(DeviceVendor::All),
1278              nsCaseInsensitiveStringComparator);
1279 }
1280
1281 bool GfxInfoBase::DoesDriverVendorMatch(const nsAString& aBlocklistVendor,
1282                                         const nsAString& aDriverVendor) {
1283   return aBlocklistVendor.Equals(aDriverVendor,
1284                                  nsCaseInsensitiveStringComparator) ||
1285          aBlocklistVendor.Equals(
1286              GfxDriverInfo::GetDriverVendor(DriverVendor::All),
1287              nsCaseInsensitiveStringComparator);
1288 }
1289
1290 bool GfxInfoBase::IsFeatureAllowlisted(int32_t aFeature) const {
1291   return aFeature == nsIGfxInfo::FEATURE_HW_DECODED_VIDEO_ZERO_COPY;
1292 }
1293
1294 nsresult GfxInfoBase::GetFeatureStatusImpl(
1295     int32_t aFeature, int32_t* aStatus, nsAString& aSuggestedVersion,
1296     const nsTArray<GfxDriverInfo>& aDriverInfo, nsACString& aFailureId,
1297     OperatingSystem* aOS /* = nullptr */) {
1298   if (aFeature <= 0) {
1299     gfxWarning() << "Invalid feature <= 0";
1300     return NS_OK;
1301   }
1302
1303   if (*aStatus != nsIGfxInfo::FEATURE_STATUS_UNKNOWN) {
1304     // Terminate now with the status determined by the derived type (OS-specific
1305     // code).
1306     return NS_OK;
1307   }
1308
1309   if (sShutdownOccurred) {
1310     // This is futile; we've already commenced shutdown and our blocklists have
1311     // been deleted. We may want to look into resurrecting the blocklist instead
1312     // but for now, just don't even go there.
1313     return NS_OK;
1314   }
1315
1316   // Ensure any additional initialization required is complete.
1317   GetData();
1318
1319   // If an operating system was provided by the derived GetFeatureStatusImpl,
1320   // grab it here. Otherwise, the OS is unknown.
1321   OperatingSystem os = (aOS ? *aOS : OperatingSystem::Unknown);
1322
1323   nsAutoString adapterVendorID;
1324   nsAutoString adapterDeviceID;
1325   nsAutoString adapterDriverVersionString;
1326   if (NS_FAILED(GetAdapterVendorID(adapterVendorID)) ||
1327       NS_FAILED(GetAdapterDeviceID(adapterDeviceID)) ||
1328       NS_FAILED(GetAdapterDriverVersion(adapterDriverVersionString))) {
1329     if (OnlyAllowFeatureOnKnownConfig(aFeature)) {
1330       aFailureId = "FEATURE_FAILURE_CANT_RESOLVE_ADAPTER";
1331       *aStatus = nsIGfxInfo::FEATURE_BLOCKED_DEVICE;
1332     } else {
1333       *aStatus = nsIGfxInfo::FEATURE_STATUS_OK;
1334     }
1335     return NS_OK;
1336   }
1337
1338   // We only check either the given blocklist, or the static list, as given.
1339   int32_t status;
1340   if (aDriverInfo.Length()) {
1341     status =
1342         FindBlocklistedDeviceInList(aDriverInfo, aSuggestedVersion, aFeature,
1343                                     aFailureId, os, /* aForAllowing */ false);
1344   } else {
1345     if (!sDriverInfo) {
1346       sDriverInfo = new nsTArray<GfxDriverInfo>();
1347     }
1348     status = FindBlocklistedDeviceInList(GetGfxDriverInfo(), aSuggestedVersion,
1349                                          aFeature, aFailureId, os,
1350                                          /* aForAllowing */ false);
1351   }
1352
1353   if (status == nsIGfxInfo::FEATURE_STATUS_UNKNOWN) {
1354     if (IsFeatureAllowlisted(aFeature)) {
1355       // This feature is actually using the allowlist; that means after we pass
1356       // the blocklist to prevent us explicitly from getting the feature, we now
1357       // need to check the allowlist to ensure we are allowed to get it in the
1358       // first place.
1359       if (aDriverInfo.Length()) {
1360         status = FindBlocklistedDeviceInList(aDriverInfo, aSuggestedVersion,
1361                                              aFeature, aFailureId, os,
1362                                              /* aForAllowing */ true);
1363       } else {
1364         status = FindBlocklistedDeviceInList(
1365             GetGfxDriverInfo(), aSuggestedVersion, aFeature, aFailureId, os,
1366             /* aForAllowing */ true);
1367       }
1368
1369       if (status == nsIGfxInfo::FEATURE_STATUS_UNKNOWN) {
1370         status = nsIGfxInfo::FEATURE_DENIED;
1371       }
1372     } else {
1373       // It's now done being processed. It's safe to set the status to
1374       // STATUS_OK.
1375       status = nsIGfxInfo::FEATURE_STATUS_OK;
1376     }
1377   }
1378
1379   *aStatus = status;
1380   return NS_OK;
1381 }
1382
1383 NS_IMETHODIMP
1384 GfxInfoBase::GetFeatureSuggestedDriverVersion(int32_t aFeature,
1385                                               nsAString& aVersion) {
1386   nsCString version;
1387   if (GetPrefValueForDriverVersion(version)) {
1388     aVersion = NS_ConvertASCIItoUTF16(version);
1389     return NS_OK;
1390   }
1391
1392   int32_t status;
1393   nsCString discardFailureId;
1394   nsTArray<GfxDriverInfo> driverInfo;
1395   return GetFeatureStatusImpl(aFeature, &status, aVersion, driverInfo,
1396                               discardFailureId);
1397 }
1398
1399 void GfxInfoBase::EvaluateDownloadedBlocklist(
1400     nsTArray<GfxDriverInfo>& aDriverInfo) {
1401   // If the list is empty, then we don't actually want to call
1402   // GetFeatureStatusImpl since we will use the static list instead. In that
1403   // case, all we want to do is make sure the pref is removed.
1404   if (aDriverInfo.IsEmpty()) {
1405     gfxCriticalNoteOnce << "Evaluate empty downloaded blocklist";
1406     return;
1407   }
1408
1409   OperatingSystem os = GetOperatingSystem();
1410
1411   // For every feature we know about, we evaluate whether this blocklist has a
1412   // non-STATUS_OK status. If it does, we set the pref we evaluate in
1413   // GetFeatureStatus above, so we don't need to hold on to this blocklist
1414   // anywhere permanent.
1415   for (int feature = 1; feature <= nsIGfxInfo::FEATURE_MAX_VALUE; ++feature) {
1416     int32_t status = nsIGfxInfo::FEATURE_STATUS_UNKNOWN;
1417     nsCString failureId;
1418     nsAutoString suggestedVersion;
1419
1420     // Note that we are careful to call the base class method since we only want
1421     // to evaluate the downloadable blocklist for these prefs.
1422     MOZ_ALWAYS_TRUE(NS_SUCCEEDED(GfxInfoBase::GetFeatureStatusImpl(
1423         feature, &status, suggestedVersion, aDriverInfo, failureId, &os)));
1424
1425     switch (status) {
1426       default:
1427         MOZ_FALLTHROUGH_ASSERT("Unhandled feature status!");
1428       case nsIGfxInfo::FEATURE_STATUS_UNKNOWN:
1429         // This may be returned during shutdown or for invalid features.
1430       case nsIGfxInfo::FEATURE_ALLOW_ALWAYS:
1431       case nsIGfxInfo::FEATURE_ALLOW_QUALIFIED:
1432       case nsIGfxInfo::FEATURE_DENIED:
1433         // We cannot use the downloadable blocklist to control the allowlist.
1434         // If a feature is allowlisted, then we should also ignore DENIED
1435         // statuses from GetFeatureStatusImpl because we don't check the
1436         // static list when and this is an expected value. If we wish to
1437         // override the allowlist, it is as simple as creating a normal
1438         // blocklist rule with a BLOCKED* status code.
1439       case nsIGfxInfo::FEATURE_STATUS_OK:
1440         RemovePrefForFeature(feature);
1441         break;
1442
1443       case nsIGfxInfo::FEATURE_BLOCKED_DRIVER_VERSION:
1444         if (!suggestedVersion.IsEmpty()) {
1445           SetPrefValueForDriverVersion(suggestedVersion);
1446         } else {
1447           RemovePrefForDriverVersion();
1448         }
1449         [[fallthrough]];
1450
1451       case nsIGfxInfo::FEATURE_BLOCKED_MISMATCHED_VERSION:
1452       case nsIGfxInfo::FEATURE_BLOCKED_DEVICE:
1453       case nsIGfxInfo::FEATURE_DISCOURAGED:
1454       case nsIGfxInfo::FEATURE_BLOCKED_OS_VERSION:
1455       case nsIGfxInfo::FEATURE_BLOCKED_PLATFORM_TEST:
1456         SetPrefValueForFeature(feature, status, failureId);
1457         break;
1458     }
1459   }
1460 }
1461
1462 NS_IMETHODIMP_(void)
1463 GfxInfoBase::LogFailure(const nsACString& failure) {
1464   // gfxCriticalError has a mutex lock of its own, so we may not actually
1465   // need this lock. ::GetFailures() accesses the data but the LogForwarder
1466   // will not return the copy of the logs unless it can get the same lock
1467   // that gfxCriticalError uses.  Still, that is so much of an implementation
1468   // detail that it's nicer to just add an extra lock here and in
1469   // ::GetFailures()
1470   MutexAutoLock lock(mMutex);
1471
1472   // By default, gfxCriticalError asserts; make it not assert in this case.
1473   gfxCriticalError(CriticalLog::DefaultOptions(false))
1474       << "(LF) " << failure.BeginReading();
1475 }
1476
1477 NS_IMETHODIMP GfxInfoBase::GetFailures(nsTArray<int32_t>& indices,
1478                                        nsTArray<nsCString>& failures) {
1479   MutexAutoLock lock(mMutex);
1480
1481   LogForwarder* logForwarder = Factory::GetLogForwarder();
1482   if (!logForwarder) {
1483     return NS_ERROR_UNEXPECTED;
1484   }
1485
1486   // There are two string copies in this method, starting with this one. We are
1487   // assuming this is not a big deal, as the size of the array should be small
1488   // and the strings in it should be small as well (the error messages in the
1489   // code.)  The second copy happens with the AppendElement() calls.
1490   // Technically, we don't need the mutex lock after the StringVectorCopy()
1491   // call.
1492   LoggingRecord loggedStrings = logForwarder->LoggingRecordCopy();
1493   LoggingRecord::const_iterator it;
1494   for (it = loggedStrings.begin(); it != loggedStrings.end(); ++it) {
1495     failures.AppendElement(nsDependentCSubstring(std::get<1>(*it).c_str(),
1496                                                  std::get<1>(*it).size()));
1497     indices.AppendElement(std::get<0>(*it));
1498   }
1499
1500   return NS_OK;
1501 }
1502
1503 nsTArray<GfxInfoCollectorBase*>* sCollectors;
1504
1505 static void InitCollectors() {
1506   if (!sCollectors) sCollectors = new nsTArray<GfxInfoCollectorBase*>;
1507 }
1508
1509 nsresult GfxInfoBase::GetInfo(JSContext* aCx,
1510                               JS::MutableHandle<JS::Value> aResult) {
1511   InitCollectors();
1512   InfoObject obj(aCx);
1513
1514   for (uint32_t i = 0; i < sCollectors->Length(); i++) {
1515     (*sCollectors)[i]->GetInfo(obj);
1516   }
1517
1518   // Some example property definitions
1519   // obj.DefineProperty("wordCacheSize", gfxTextRunWordCache::Count());
1520   // obj.DefineProperty("renderer", mRendererIDsString);
1521   // obj.DefineProperty("five", 5);
1522
1523   if (!obj.mOk) {
1524     return NS_ERROR_FAILURE;
1525   }
1526
1527   aResult.setObject(*obj.mObj);
1528   return NS_OK;
1529 }
1530
1531 nsAutoCString gBaseAppVersion;
1532
1533 const nsCString& GfxInfoBase::GetApplicationVersion() {
1534   static bool versionInitialized = false;
1535   if (!versionInitialized) {
1536     // If we fail to get the version, we will not try again.
1537     versionInitialized = true;
1538
1539     // Get the version from xpcom/system/nsIXULAppInfo.idl
1540     nsCOMPtr<nsIXULAppInfo> app = do_GetService("@mozilla.org/xre/app-info;1");
1541     if (app) {
1542       app->GetVersion(gBaseAppVersion);
1543     }
1544   }
1545   return gBaseAppVersion;
1546 }
1547
1548 /* static */ bool GfxInfoBase::OnlyAllowFeatureOnKnownConfig(int32_t aFeature) {
1549   switch (aFeature) {
1550     // The GPU process doesn't need hardware acceleration and can run on
1551     // devices that we normally block from not being on our whitelist.
1552     case nsIGfxInfo::FEATURE_GPU_PROCESS:
1553       return kIsAndroid;
1554     // We can mostly assume that ANGLE will work
1555     case nsIGfxInfo::FEATURE_DIRECT3D_11_ANGLE:
1556     // Remote WebGL is needed for Win32k Lockdown, so it should be enabled
1557     // regardless of HW support or not
1558     case nsIGfxInfo::FEATURE_ALLOW_WEBGL_OUT_OF_PROCESS:
1559     // Backdrop filter should generally work, especially if we fall back to
1560     // Software WebRender because of an unknown vendor.
1561     case nsIGfxInfo::FEATURE_BACKDROP_FILTER:
1562       return false;
1563     default:
1564       return true;
1565   }
1566 }
1567
1568 void GfxInfoBase::AddCollector(GfxInfoCollectorBase* collector) {
1569   InitCollectors();
1570   sCollectors->AppendElement(collector);
1571 }
1572
1573 void GfxInfoBase::RemoveCollector(GfxInfoCollectorBase* collector) {
1574   InitCollectors();
1575   for (uint32_t i = 0; i < sCollectors->Length(); i++) {
1576     if ((*sCollectors)[i] == collector) {
1577       sCollectors->RemoveElementAt(i);
1578       break;
1579     }
1580   }
1581   if (sCollectors->IsEmpty()) {
1582     delete sCollectors;
1583     sCollectors = nullptr;
1584   }
1585 }
1586
1587 static void AppendMonitor(JSContext* aCx, widget::Screen& aScreen,
1588                           JS::Handle<JSObject*> aOutArray, int32_t aIndex) {
1589   JS::Rooted<JSObject*> obj(aCx, JS_NewPlainObject(aCx));
1590
1591   auto screenSize = aScreen.GetRect().Size();
1592
1593   JS::Rooted<JS::Value> screenWidth(aCx, JS::Int32Value(screenSize.width));
1594   JS_SetProperty(aCx, obj, "screenWidth", screenWidth);
1595
1596   JS::Rooted<JS::Value> screenHeight(aCx, JS::Int32Value(screenSize.height));
1597   JS_SetProperty(aCx, obj, "screenHeight", screenHeight);
1598
1599   // XXX Just preserving behavior since this is exposed to telemetry, but we
1600   // could consider including this everywhere.
1601 #ifdef XP_MACOSX
1602   JS::Rooted<JS::Value> scale(
1603       aCx, JS::NumberValue(aScreen.GetContentsScaleFactor()));
1604   JS_SetProperty(aCx, obj, "scale", scale);
1605 #endif
1606
1607 #ifdef XP_WIN
1608   JS::Rooted<JS::Value> refreshRate(aCx,
1609                                     JS::Int32Value(aScreen.GetRefreshRate()));
1610   JS_SetProperty(aCx, obj, "refreshRate", refreshRate);
1611
1612   JS::Rooted<JS::Value> pseudoDisplay(
1613       aCx, JS::BooleanValue(aScreen.GetIsPseudoDisplay()));
1614   JS_SetProperty(aCx, obj, "pseudoDisplay", pseudoDisplay);
1615 #endif
1616
1617   JS::Rooted<JS::Value> element(aCx, JS::ObjectValue(*obj));
1618   JS_SetElement(aCx, aOutArray, aIndex, element);
1619 }
1620
1621 nsresult GfxInfoBase::FindMonitors(JSContext* aCx,
1622                                    JS::Handle<JSObject*> aOutArray) {
1623   int32_t index = 0;
1624   auto& sm = ScreenManager::GetSingleton();
1625   for (auto& screen : sm.CurrentScreenList()) {
1626     AppendMonitor(aCx, *screen, aOutArray, index++);
1627   }
1628
1629   if (index == 0) {
1630     // Ensure we return at least one monitor, this is needed for xpcshell.
1631     RefPtr<Screen> screen = sm.GetPrimaryScreen();
1632     AppendMonitor(aCx, *screen, aOutArray, index++);
1633   }
1634
1635   return NS_OK;
1636 }
1637
1638 NS_IMETHODIMP
1639 GfxInfoBase::GetMonitors(JSContext* aCx, JS::MutableHandle<JS::Value> aResult) {
1640   JS::Rooted<JSObject*> array(aCx, JS::NewArrayObject(aCx, 0));
1641
1642   nsresult rv = FindMonitors(aCx, array);
1643   if (NS_FAILED(rv)) {
1644     return rv;
1645   }
1646
1647   aResult.setObject(*array);
1648   return NS_OK;
1649 }
1650
1651 static inline bool SetJSPropertyString(JSContext* aCx,
1652                                        JS::Handle<JSObject*> aObj,
1653                                        const char* aProp, const char* aString) {
1654   JS::Rooted<JSString*> str(aCx, JS_NewStringCopyZ(aCx, aString));
1655   if (!str) {
1656     return false;
1657   }
1658
1659   JS::Rooted<JS::Value> val(aCx, JS::StringValue(str));
1660   return JS_SetProperty(aCx, aObj, aProp, val);
1661 }
1662
1663 template <typename T>
1664 static inline bool AppendJSElement(JSContext* aCx, JS::Handle<JSObject*> aObj,
1665                                    const T& aValue) {
1666   uint32_t index;
1667   if (!JS::GetArrayLength(aCx, aObj, &index)) {
1668     return false;
1669   }
1670   return JS_SetElement(aCx, aObj, index, aValue);
1671 }
1672
1673 nsresult GfxInfoBase::GetFeatures(JSContext* aCx,
1674                                   JS::MutableHandle<JS::Value> aOut) {
1675   JS::Rooted<JSObject*> obj(aCx, JS_NewPlainObject(aCx));
1676   if (!obj) {
1677     return NS_ERROR_OUT_OF_MEMORY;
1678   }
1679   aOut.setObject(*obj);
1680
1681   layers::LayersBackend backend =
1682       gfxPlatform::Initialized()
1683           ? gfxPlatform::GetPlatform()->GetCompositorBackend()
1684           : layers::LayersBackend::LAYERS_NONE;
1685   const char* backendName = layers::GetLayersBackendName(backend);
1686   SetJSPropertyString(aCx, obj, "compositor", backendName);
1687
1688   // If graphics isn't initialized yet, just stop now.
1689   if (!gfxPlatform::Initialized()) {
1690     return NS_OK;
1691   }
1692
1693   DescribeFeatures(aCx, obj);
1694   return NS_OK;
1695 }
1696
1697 nsresult GfxInfoBase::GetFeatureLog(JSContext* aCx,
1698                                     JS::MutableHandle<JS::Value> aOut) {
1699   JS::Rooted<JSObject*> containerObj(aCx, JS_NewPlainObject(aCx));
1700   if (!containerObj) {
1701     return NS_ERROR_OUT_OF_MEMORY;
1702   }
1703   aOut.setObject(*containerObj);
1704
1705   JS::Rooted<JSObject*> featureArray(aCx, JS::NewArrayObject(aCx, 0));
1706   if (!featureArray) {
1707     return NS_ERROR_OUT_OF_MEMORY;
1708   }
1709
1710   // Collect features.
1711   gfxConfig::ForEachFeature([&](const char* aName, const char* aDescription,
1712                                 FeatureState& aFeature) -> void {
1713     JS::Rooted<JSObject*> obj(aCx, JS_NewPlainObject(aCx));
1714     if (!obj) {
1715       return;
1716     }
1717     if (!SetJSPropertyString(aCx, obj, "name", aName) ||
1718         !SetJSPropertyString(aCx, obj, "description", aDescription) ||
1719         !SetJSPropertyString(aCx, obj, "status",
1720                              FeatureStatusToString(aFeature.GetValue()))) {
1721       return;
1722     }
1723
1724     JS::Rooted<JS::Value> log(aCx);
1725     if (!BuildFeatureStateLog(aCx, aFeature, &log)) {
1726       return;
1727     }
1728     if (!JS_SetProperty(aCx, obj, "log", log)) {
1729       return;
1730     }
1731
1732     if (!AppendJSElement(aCx, featureArray, obj)) {
1733       return;
1734     }
1735   });
1736
1737   JS::Rooted<JSObject*> fallbackArray(aCx, JS::NewArrayObject(aCx, 0));
1738   if (!fallbackArray) {
1739     return NS_ERROR_OUT_OF_MEMORY;
1740   }
1741
1742   // Collect fallbacks.
1743   gfxConfig::ForEachFallback(
1744       [&](const char* aName, const char* aMessage) -> void {
1745         JS::Rooted<JSObject*> obj(aCx, JS_NewPlainObject(aCx));
1746         if (!obj) {
1747           return;
1748         }
1749
1750         if (!SetJSPropertyString(aCx, obj, "name", aName) ||
1751             !SetJSPropertyString(aCx, obj, "message", aMessage)) {
1752           return;
1753         }
1754
1755         if (!AppendJSElement(aCx, fallbackArray, obj)) {
1756           return;
1757         }
1758       });
1759
1760   JS::Rooted<JS::Value> val(aCx);
1761
1762   val = JS::ObjectValue(*featureArray);
1763   JS_SetProperty(aCx, containerObj, "features", val);
1764
1765   val = JS::ObjectValue(*fallbackArray);
1766   JS_SetProperty(aCx, containerObj, "fallbacks", val);
1767
1768   return NS_OK;
1769 }
1770
1771 bool GfxInfoBase::BuildFeatureStateLog(JSContext* aCx,
1772                                        const FeatureState& aFeature,
1773                                        JS::MutableHandle<JS::Value> aOut) {
1774   JS::Rooted<JSObject*> log(aCx, JS::NewArrayObject(aCx, 0));
1775   if (!log) {
1776     return false;
1777   }
1778   aOut.setObject(*log);
1779
1780   aFeature.ForEachStatusChange([&](const char* aType, FeatureStatus aStatus,
1781                                    const char* aMessage,
1782                                    const nsCString& aFailureId) -> void {
1783     JS::Rooted<JSObject*> obj(aCx, JS_NewPlainObject(aCx));
1784     if (!obj) {
1785       return;
1786     }
1787
1788     if (!SetJSPropertyString(aCx, obj, "type", aType) ||
1789         !SetJSPropertyString(aCx, obj, "status",
1790                              FeatureStatusToString(aStatus)) ||
1791         (!aFailureId.IsEmpty() &&
1792          !SetJSPropertyString(aCx, obj, "failureId", aFailureId.get())) ||
1793         (aMessage && !SetJSPropertyString(aCx, obj, "message", aMessage))) {
1794       return;
1795     }
1796
1797     if (!AppendJSElement(aCx, log, obj)) {
1798       return;
1799     }
1800   });
1801
1802   return true;
1803 }
1804
1805 void GfxInfoBase::DescribeFeatures(JSContext* aCx, JS::Handle<JSObject*> aObj) {
1806   JS::Rooted<JSObject*> obj(aCx);
1807
1808   gfx::FeatureState& hwCompositing =
1809       gfxConfig::GetFeature(gfx::Feature::HW_COMPOSITING);
1810   InitFeatureObject(aCx, aObj, "hwCompositing", hwCompositing, &obj);
1811
1812   gfx::FeatureState& gpuProcess =
1813       gfxConfig::GetFeature(gfx::Feature::GPU_PROCESS);
1814   InitFeatureObject(aCx, aObj, "gpuProcess", gpuProcess, &obj);
1815
1816   gfx::FeatureState& webrender = gfxConfig::GetFeature(gfx::Feature::WEBRENDER);
1817   InitFeatureObject(aCx, aObj, "webrender", webrender, &obj);
1818
1819   gfx::FeatureState& wrCompositor =
1820       gfxConfig::GetFeature(gfx::Feature::WEBRENDER_COMPOSITOR);
1821   InitFeatureObject(aCx, aObj, "wrCompositor", wrCompositor, &obj);
1822
1823   gfx::FeatureState& openglCompositing =
1824       gfxConfig::GetFeature(gfx::Feature::OPENGL_COMPOSITING);
1825   InitFeatureObject(aCx, aObj, "openglCompositing", openglCompositing, &obj);
1826
1827   gfx::FeatureState& omtp = gfxConfig::GetFeature(gfx::Feature::OMTP);
1828   InitFeatureObject(aCx, aObj, "omtp", omtp, &obj);
1829 }
1830
1831 bool GfxInfoBase::InitFeatureObject(JSContext* aCx,
1832                                     JS::Handle<JSObject*> aContainer,
1833                                     const char* aName,
1834                                     mozilla::gfx::FeatureState& aFeatureState,
1835                                     JS::MutableHandle<JSObject*> aOutObj) {
1836   JS::Rooted<JSObject*> obj(aCx, JS_NewPlainObject(aCx));
1837   if (!obj) {
1838     return false;
1839   }
1840
1841   nsCString status = aFeatureState.GetStatusAndFailureIdString();
1842
1843   JS::Rooted<JSString*> str(aCx, JS_NewStringCopyZ(aCx, status.get()));
1844   JS::Rooted<JS::Value> val(aCx, JS::StringValue(str));
1845   JS_SetProperty(aCx, obj, "status", val);
1846
1847   // Add the feature object to the container.
1848   {
1849     JS::Rooted<JS::Value> val(aCx, JS::ObjectValue(*obj));
1850     JS_SetProperty(aCx, aContainer, aName, val);
1851   }
1852
1853   aOutObj.set(obj);
1854   return true;
1855 }
1856
1857 nsresult GfxInfoBase::GetActiveCrashGuards(JSContext* aCx,
1858                                            JS::MutableHandle<JS::Value> aOut) {
1859   JS::Rooted<JSObject*> array(aCx, JS::NewArrayObject(aCx, 0));
1860   if (!array) {
1861     return NS_ERROR_OUT_OF_MEMORY;
1862   }
1863   aOut.setObject(*array);
1864
1865   DriverCrashGuard::ForEachActiveCrashGuard(
1866       [&](const char* aName, const char* aPrefName) -> void {
1867         JS::Rooted<JSObject*> obj(aCx, JS_NewPlainObject(aCx));
1868         if (!obj) {
1869           return;
1870         }
1871         if (!SetJSPropertyString(aCx, obj, "type", aName)) {
1872           return;
1873         }
1874         if (!SetJSPropertyString(aCx, obj, "prefName", aPrefName)) {
1875           return;
1876         }
1877         if (!AppendJSElement(aCx, array, obj)) {
1878           return;
1879         }
1880       });
1881
1882   return NS_OK;
1883 }
1884
1885 NS_IMETHODIMP
1886 GfxInfoBase::GetTargetFrameRate(uint32_t* aTargetFrameRate) {
1887   *aTargetFrameRate = gfxPlatform::TargetFrameRate();
1888   return NS_OK;
1889 }
1890
1891 NS_IMETHODIMP
1892 GfxInfoBase::GetCodecSupportInfo(nsACString& aCodecSupportInfo) {
1893   aCodecSupportInfo.Assign(gfx::gfxVars::CodecSupportInfo());
1894   return NS_OK;
1895 }
1896
1897 NS_IMETHODIMP
1898 GfxInfoBase::GetIsHeadless(bool* aIsHeadless) {
1899   *aIsHeadless = gfxPlatform::IsHeadless();
1900   return NS_OK;
1901 }
1902
1903 #if defined(MOZ_WIDGET_ANDROID)
1904
1905 const char* chromebookProductList[] = {
1906     "asuka",    "asurada",   "atlas",    "auron",    "banjo",     "banon",
1907     "bob",      "brask",     "brya",     "buddy",    "butterfly", "candy",
1908     "caroline", "cave",      "celes",    "chell",    "cherry",    "clapper",
1909     "coral",    "corsola",   "cyan",     "daisy",    "dedede",    "drallion",
1910     "edgar",    "elm",       "enguarde", "eve",      "expresso",  "falco",
1911     "fizz",     "gandof",    "glimmer",  "gnawty",   "grunt",     "guado",
1912     "guybrush", "hana",      "hatch",    "heli",     "jacuzzi",   "kalista",
1913     "kefka",    "kevin",     "kip",      "kukui",    "lars",      "leon",
1914     "link",     "lulu",      "lumpy",    "mccloud",  "monroe",    "nami",
1915     "nautilus", "ninja",     "nissa",    "nocturne", "nyan",      "octopus",
1916     "orco",     "panther",   "parrot",   "peach",    "peppy",     "puff",
1917     "pyro",     "quawks",    "rammus",   "reef",     "reks",      "relm",
1918     "rikku",    "samus",     "sand",     "sarien",   "scarlet",   "sentry",
1919     "setzer",   "skyrim",    "snappy",   "soraka",   "squawks",   "staryu",
1920     "stout",    "strongbad", "stumpy",   "sumo",     "swanky",    "terra",
1921     "tidus",    "tricky",    "trogdor",  "ultima",   "veyron",    "volteer",
1922     "winky",    "wizpig",    "wolf",     "x86",      "zako",      "zork"};
1923
1924 bool ProductIsChromebook(nsCString product) {
1925   size_t result;
1926   return BinarySearchIf(
1927       chromebookProductList, 0, ArrayLength(chromebookProductList),
1928       [&](const char* const aValue) -> int {
1929         return strcmp(product.get(), aValue);
1930       },
1931       &result);
1932 }
1933 #endif
1934
1935 using Device = nsIGfxInfo::FontVisibilityDeviceDetermination;
1936 static StaticAutoPtr<std::pair<Device, nsString>> ret;
1937
1938 std::pair<Device, nsString>* GfxInfoBase::GetFontVisibilityDeterminationPair() {
1939   if (!ret) {
1940     ret = new std::pair<Device, nsString>();
1941     ret->first = Device::Unassigned;
1942     ret->second = u""_ns;
1943     ClearOnShutdown(&ret);
1944   }
1945
1946   if (ret->first != Device::Unassigned) {
1947     return ret;
1948   }
1949
1950 #if defined(MOZ_WIDGET_ANDROID)
1951   auto androidReleaseVersion = strtol(
1952       java::sdk::Build::VERSION::RELEASE()->ToCString().get(), nullptr, 10);
1953
1954   auto androidManufacturer = java::sdk::Build::MANUFACTURER()->ToCString();
1955   nsContentUtils::ASCIIToLower(androidManufacturer);
1956
1957   auto androidBrand = java::sdk::Build::BRAND()->ToCString();
1958   nsContentUtils::ASCIIToLower(androidBrand);
1959
1960   auto androidModel = java::sdk::Build::MODEL()->ToCString();
1961   nsContentUtils::ASCIIToLower(androidModel);
1962
1963   auto androidProduct = java::sdk::Build::PRODUCT()->ToCString();
1964   nsContentUtils::ASCIIToLower(androidProduct);
1965
1966   auto androidProductIsChromebook = ProductIsChromebook(androidProduct);
1967
1968   if (androidReleaseVersion < 4 || androidReleaseVersion > 20) {
1969     // Something is screwy, oh well.
1970     ret->second.AppendASCII("Unknown Release Version - ");
1971     ret->first = Device::Android_Unknown_Release_Version;
1972   } else if (androidReleaseVersion <= 8) {
1973     ret->second.AppendASCII("Android <9 - ");
1974     ret->first = Device::Android_sub_9;
1975   } else if (androidReleaseVersion <= 11) {
1976     ret->second.AppendASCII("Android 9-11 - ");
1977     ret->first = Device::Android_9_11;
1978   } else if (androidReleaseVersion > 11) {
1979     ret->second.AppendASCII("Android 12+ - ");
1980     ret->first = Device::Android_12_plus;
1981   } else {
1982     MOZ_CRASH_UNSAFE_PRINTF(
1983         "Somehow wound up in GetFontVisibilityDeterminationPair with a release "
1984         "version of %li",
1985         androidReleaseVersion);
1986   }
1987
1988   if (androidManufacturer == "google" && androidModel == androidProduct &&
1989       androidProductIsChromebook) {
1990     // Chromebook font set coming later
1991     ret->second.AppendASCII("Chromebook - ");
1992     ret->first = Device::Android_Chromebook;
1993   }
1994   if (androidBrand == "amazon") {
1995     // Amazon Fire font set coming later
1996     ret->second.AppendASCII("Amazon - ");
1997     ret->first = Device::Android_Amazon;
1998   }
1999   if (androidBrand == "peloton") {
2000     // We don't know how to categorize fonts on this system
2001     ret->second.AppendASCII("Peloton - ");
2002     ret->first = Device::Android_Unknown_Peloton;
2003   }
2004   if (androidProduct == "vbox86p") {
2005     ret->second.AppendASCII("vbox - ");
2006     // We can't categorize fonts when running in an emulator on a Desktop
2007     ret->first = Device::Android_Unknown_vbox;
2008   }
2009   if (androidModel.Find("mitv"_ns) != kNotFound && androidBrand == "xiaomi") {
2010     // We don't know how to categorize fonts on this system
2011     ret->second.AppendASCII("mitv - ");
2012     ret->first = Device::Android_Unknown_mitv;
2013   }
2014
2015   ret->second.AppendPrintf(
2016       "release_version_str=%s, release_version=%li",
2017       java::sdk::Build::VERSION::RELEASE()->ToCString().get(),
2018       androidReleaseVersion);
2019   ret->second.AppendPrintf(
2020       ", manufacturer=%s, brand=%s, model=%s, product=%s, chromebook=%s",
2021       androidManufacturer.get(), androidBrand.get(), androidModel.get(),
2022       androidProduct.get(), androidProductIsChromebook ? "yes" : "no");
2023
2024 #elif defined(XP_LINUX)
2025   ret->first = Device::Linux_Unknown;
2026
2027   long versionMajor = 0;
2028   FILE* fp = fopen("/etc/os-release", "r");
2029   if (fp) {
2030     char buf[512];
2031     while (fgets(buf, sizeof(buf), fp)) {
2032       if (strncmp(buf, "VERSION_ID=\"", 12) == 0) {
2033         ret->second.AppendPrintf("VERSION_ID=%.11s", buf + 11);
2034         versionMajor = strtol(buf + 12, nullptr, 10);
2035         if (ret->first != Device::Linux_Unknown) {
2036           break;
2037         }
2038       }
2039
2040       if (strncmp(buf, "ID=", 3) == 0) {
2041         ret->second.AppendPrintf("ID=%.6s", buf + 3);
2042         if (strncmp(buf + 3, "ubuntu", 6) == 0) {
2043           ret->first = Device::Linux_Ubuntu_any;
2044         } else if (strncmp(buf + 3, "fedora", 6) == 0) {
2045           ret->first = Device::Linux_Fedora_any;
2046         }
2047
2048         if (versionMajor) {
2049           break;
2050         }
2051       }
2052     }
2053     fclose(fp);
2054   }
2055   if (ret->first == Device::Linux_Ubuntu_any) {
2056     if (versionMajor == 20) {
2057       ret->first = Device::Linux_Ubuntu_20;
2058       ret->second.Insert(u"Ubuntu 20 - ", 0);
2059     } else if (versionMajor == 22) {
2060       ret->first = Device::Linux_Ubuntu_22;
2061       ret->second.Insert(u"Ubuntu 22 - ", 0);
2062     } else {
2063       ret->second.Insert(u"Ubuntu Unknown - ", 0);
2064     }
2065   } else if (ret->first == Device::Linux_Fedora_any) {
2066     if (versionMajor == 38) {
2067       ret->first = Device::Linux_Fedora_38;
2068       ret->second.Insert(u"Fedora 38 - ", 0);
2069     } else if (versionMajor == 39) {
2070       ret->first = Device::Linux_Fedora_39;
2071       ret->second.Insert(u"Fedora 39 - ", 0);
2072     } else {
2073       ret->second.Insert(u"Fedora Unknown - ", 0);
2074     }
2075   } else {
2076     ret->second.Insert(u"Linux Unknown - ", 0);
2077   }
2078
2079 #elif defined(XP_MACOSX)
2080   ret->first = Device::MacOS_Platform;
2081   ret->second.AppendASCII("macOS Platform");
2082 #elif defined(XP_WIN)
2083   ret->first = Device::Windows_Platform;
2084   ret->second.AppendASCII("Windows Platform");
2085 #else
2086   ret->first = Device::Unknown_Platform;
2087   ret->second.AppendASCII("Unknown Platform");
2088 #endif
2089
2090   return ret;
2091 }
2092
2093 NS_IMETHODIMP
2094 GfxInfoBase::GetFontVisibilityDetermination(
2095     Device* aFontVisibilityDetermination) {
2096   auto ret = GetFontVisibilityDeterminationPair();
2097
2098   *aFontVisibilityDetermination = ret->first;
2099   return NS_OK;
2100 }
2101
2102 NS_IMETHODIMP
2103 GfxInfoBase::GetFontVisibilityDeterminationStr(
2104     nsAString& aFontVisibilityDeterminationStr) {
2105   auto ret = GetFontVisibilityDeterminationPair();
2106   aFontVisibilityDeterminationStr.Assign(ret->second);
2107   return NS_OK;
2108 }
2109
2110 NS_IMETHODIMP
2111 GfxInfoBase::GetContentBackend(nsAString& aContentBackend) {
2112   BackendType backend = gfxPlatform::GetPlatform()->GetDefaultContentBackend();
2113   nsString outStr;
2114
2115   switch (backend) {
2116     case BackendType::DIRECT2D1_1: {
2117       outStr.AppendPrintf("Direct2D 1.1");
2118       break;
2119     }
2120     case BackendType::SKIA: {
2121       outStr.AppendPrintf("Skia");
2122       break;
2123     }
2124     case BackendType::CAIRO: {
2125       outStr.AppendPrintf("Cairo");
2126       break;
2127     }
2128     default:
2129       return NS_ERROR_FAILURE;
2130   }
2131
2132   aContentBackend.Assign(outStr);
2133   return NS_OK;
2134 }
2135
2136 NS_IMETHODIMP
2137 GfxInfoBase::GetAzureCanvasBackend(nsAString& aBackend) {
2138   CopyASCIItoUTF16(mozilla::MakeStringSpan(
2139                        gfxPlatform::GetPlatform()->GetAzureCanvasBackend()),
2140                    aBackend);
2141   return NS_OK;
2142 }
2143
2144 NS_IMETHODIMP
2145 GfxInfoBase::GetAzureContentBackend(nsAString& aBackend) {
2146   CopyASCIItoUTF16(mozilla::MakeStringSpan(
2147                        gfxPlatform::GetPlatform()->GetAzureContentBackend()),
2148                    aBackend);
2149   return NS_OK;
2150 }
2151
2152 NS_IMETHODIMP
2153 GfxInfoBase::GetUsingGPUProcess(bool* aOutValue) {
2154   GPUProcessManager* gpu = GPUProcessManager::Get();
2155   if (!gpu) {
2156     // Not supported in content processes.
2157     return NS_ERROR_FAILURE;
2158   }
2159
2160   *aOutValue = !!gpu->GetGPUChild();
2161   return NS_OK;
2162 }
2163
2164 NS_IMETHODIMP_(int32_t)
2165 GfxInfoBase::GetMaxRefreshRate(bool* aMixed) {
2166   if (aMixed) {
2167     *aMixed = false;
2168   }
2169
2170   int32_t maxRefreshRate = 0;
2171   for (auto& screen : ScreenManager::GetSingleton().CurrentScreenList()) {
2172     int32_t refreshRate = screen->GetRefreshRate();
2173     if (aMixed && maxRefreshRate > 0 && maxRefreshRate != refreshRate) {
2174       *aMixed = true;
2175     }
2176     maxRefreshRate = std::max(maxRefreshRate, refreshRate);
2177   }
2178
2179   return maxRefreshRate > 0 ? maxRefreshRate : -1;
2180 }
2181
2182 NS_IMETHODIMP
2183 GfxInfoBase::ControlGPUProcessForXPCShell(bool aEnable, bool* _retval) {
2184   gfxPlatform::GetPlatform();
2185
2186   GPUProcessManager* gpm = GPUProcessManager::Get();
2187   if (aEnable) {
2188     if (!gfxConfig::IsEnabled(gfx::Feature::GPU_PROCESS)) {
2189       gfxConfig::UserForceEnable(gfx::Feature::GPU_PROCESS, "xpcshell-test");
2190     }
2191     DebugOnly<nsresult> rv = gpm->EnsureGPUReady();
2192     MOZ_ASSERT(rv != NS_ERROR_ILLEGAL_DURING_SHUTDOWN);
2193   } else {
2194     gfxConfig::UserDisable(gfx::Feature::GPU_PROCESS, "xpcshell-test");
2195     gpm->KillProcess();
2196   }
2197
2198   *_retval = true;
2199   return NS_OK;
2200 }
2201
2202 NS_IMETHODIMP GfxInfoBase::KillGPUProcessForTests() {
2203   GPUProcessManager* gpm = GPUProcessManager::Get();
2204   if (!gpm) {
2205     // gfxPlatform has not been initialized.
2206     return NS_ERROR_NOT_INITIALIZED;
2207   }
2208
2209   gpm->KillProcess();
2210   return NS_OK;
2211 }
2212
2213 NS_IMETHODIMP GfxInfoBase::CrashGPUProcessForTests() {
2214   GPUProcessManager* gpm = GPUProcessManager::Get();
2215   if (!gpm) {
2216     // gfxPlatform has not been initialized.
2217     return NS_ERROR_NOT_INITIALIZED;
2218   }
2219
2220   gpm->CrashProcess();
2221   return NS_OK;
2222 }
2223
2224 GfxInfoCollectorBase::GfxInfoCollectorBase() {
2225   GfxInfoBase::AddCollector(this);
2226 }
2227
2228 GfxInfoCollectorBase::~GfxInfoCollectorBase() {
2229   GfxInfoBase::RemoveCollector(this);
2230 }