GLX, EGL: Support NV_robustness_video_memory_purge

include/GLES2/gl2ext_angle.h

@@ -554,6 +554,11 @@ GL_APICALL void GL_APIENTRY glImportSemaphoreZirconHandleANGLE(GLuint memory,
 #define GL_TEXTURE_FILTERING_HINT_CHROMIUM 0x8AF0
 #endif /* GL_CHROMIUM_texture_filtering_hint */
 
+#ifndef GL_NV_robustness_video_memory
+#define GL_NV_robustness_video_memory
+#define GL_PURGED_CONTEXT_RESET_NV 0x92BB
+#endif /* GL_NV_robustness_video_memory */
+
 // clang-format on
 
 #endif  // INCLUDE_GLES2_GL2EXT_ANGLE_H_

scripts/code_generation_hashes/packed_enum.json

@@ -4,13 +4,13 @@
   "src/common/PackedEGLEnums_autogen.h":
     "085d82d2003f02345abc4986523127d4",
   "src/common/PackedGLEnums_autogen.cpp":
-    "dfd979452806f59fff27dde8ffe8e300",
+    "2a02645fb791fc9379885d4ff3af0de4",
   "src/common/PackedGLEnums_autogen.h":
-    "8466493b646665844ac579e997ebb6ca",
+    "d7b5d92d1b44d7b2e6684c81d316a165",
   "src/common/gen_packed_gl_enums.py":
     "b3e96ea44f52ec23ee893bd843dfd2cb",
   "src/common/packed_egl_enums.json":
     "76e1b814421e121164d60a0d89cb16c1",
   "src/common/packed_gl_enums.json":
-    "5ed701940bc80450631f8886d585ef8a"
+    "2663ff32de3d8b3b848e6853f5e5eb24"
 }
\ No newline at end of file

src/common/PackedGLEnums_autogen.cpp

@@ -560,6 +560,8 @@ GraphicsResetStatus FromGLenum<GraphicsResetStatus>(GLenum from)
             return GraphicsResetStatus::InnocentContextReset;
         case GL_UNKNOWN_CONTEXT_RESET:
             return GraphicsResetStatus::UnknownContextReset;
+        case GL_PURGED_CONTEXT_RESET_NV:
+            return GraphicsResetStatus::PurgedContextResetNV;
         default:
             return GraphicsResetStatus::InvalidEnum;
     }
@@ -577,6 +579,8 @@ GLenum ToGLenum(GraphicsResetStatus from)
             return GL_INNOCENT_CONTEXT_RESET;
         case GraphicsResetStatus::UnknownContextReset:
             return GL_UNKNOWN_CONTEXT_RESET;
+        case GraphicsResetStatus::PurgedContextResetNV:
+            return GL_PURGED_CONTEXT_RESET_NV;
         default:
             UNREACHABLE();
             return 0;
@@ -599,6 +603,9 @@ std::ostream &operator<<(std::ostream &os, GraphicsResetStatus value)
         case GraphicsResetStatus::UnknownContextReset:
             os << "GL_UNKNOWN_CONTEXT_RESET";
             break;
+        case GraphicsResetStatus::PurgedContextResetNV:
+            os << "GL_PURGED_CONTEXT_RESET_NV";
+            break;
         default:
             os << "GL_INVALID_ENUM";
             break;

src/common/PackedGLEnums_autogen.h

@@ -160,9 +160,10 @@ enum class GraphicsResetStatus : uint8_t
     GuiltyContextReset   = 1,
     InnocentContextReset = 2,
     UnknownContextReset  = 3,
+    PurgedContextResetNV = 4,
 
-    InvalidEnum = 4,
-    EnumCount   = 4,
+    InvalidEnum = 5,
+    EnumCount   = 5,
 };
 
 template <>

src/common/packed_gl_enums.json

@@ -62,7 +62,8 @@
         "NoError": "GL_NO_ERROR",
         "GuiltyContextReset": "GL_GUILTY_CONTEXT_RESET",
         "InnocentContextReset": "GL_INNOCENT_CONTEXT_RESET",
-        "UnknownContextReset": "GL_UNKNOWN_CONTEXT_RESET"
+        "UnknownContextReset": "GL_UNKNOWN_CONTEXT_RESET",
+        "PurgedContextResetNV": "GL_PURGED_CONTEXT_RESET_NV"
     },
     "HintSetting":
     {

src/libANGLE/Caps.cpp

@@ -1033,6 +1033,7 @@ const ExtensionInfoMap &GetExtensionInfoMap()
         map["GL_EXT_buffer_storage"] = enableableExtension(&Extensions::bufferStorageEXT);
         map["GL_OES_texture_stencil8"] = enableableExtension(&Extensions::stencilIndex8);
         map["GL_OES_sample_shading"] = enableableExtension(&Extensions::sampleShadingOES);
+        map["GL_NV_robustness_video_memory_purge"] = esOnlyExtension(&Extensions::robustnessVideoMemoryPurgeNV);
         // GLES1 extensions
         map["GL_OES_point_size_array"] = enableableExtension(&Extensions::pointSizeArrayOES);
         map["GL_OES_texture_cube_map"] = enableableExtension(&Extensions::textureCubeMapOES);
@@ -1416,6 +1417,7 @@ std::vector<std::string> DisplayExtensions::getStrings() const
     InsertExtensionString("EGL_EXT_image_dma_buf_import",                        imageDmaBufImportEXT,               &extensionStrings);
     InsertExtensionString("EGL_EXT_image_dma_buf_import_modifiers",              imageDmaBufImportModifiersEXT,      &extensionStrings);
     InsertExtensionString("EGL_NOK_texture_from_pixmap",                         textureFromPixmapNOK,               &extensionStrings);
+    InsertExtensionString("EGL_NV_robustness_video_memory_purge",                robustnessVideoMemoryPurgeNV,               &extensionStrings);
     // clang-format on
 
     return extensionStrings;

src/libANGLE/Caps.h

@@ -653,6 +653,9 @@ struct Extensions
 
     // GL_OES_sample_shading
     bool sampleShadingOES = false;
+
+    // GL_NV_robustness_video_memory_purge
+    bool robustnessVideoMemoryPurgeNV = false;
 };
 
 // Pointer to a boolean memeber of the Extensions struct
@@ -1116,6 +1119,9 @@ struct DisplayExtensions
 
     // EGL_NOK_texture_from_pixmap
     bool textureFromPixmapNOK = false;
+
+    // EGL_NV_robustness_video_memory_purge
+    bool robustnessVideoMemoryPurgeNV = false;
 };
 
 struct DeviceExtensions

src/libANGLE/Context.cpp

@@ -3269,6 +3269,11 @@ Extensions Context::generateSupportedExtensions() const
         supportedExtensions.eglSyncOES = false;
     }
 
+    if (mDisplay->getExtensions().robustnessVideoMemoryPurgeNV)
+    {
+        supportedExtensions.robustnessVideoMemoryPurgeNV = true;
+    }
+
     supportedExtensions.memorySize = true;
 
     // GL_CHROMIUM_lose_context is implemented in the frontend

src/libANGLE/renderer/gl/ContextGL.cpp

@@ -37,8 +37,11 @@ namespace rx
 
 ContextGL::ContextGL(const gl::State &state,
                      gl::ErrorSet *errorSet,
-                     const std::shared_ptr<RendererGL> &renderer)
-    : ContextImpl(state, errorSet), mRenderer(renderer)
+                     const std::shared_ptr<RendererGL> &renderer,
+                     RobustnessVideoMemoryPurgeStatus robustnessVideoMemoryPurgeStatus)
+    : ContextImpl(state, errorSet),
+      mRenderer(renderer),
+      mRobustnessVideoMemoryPurgeStatus(robustnessVideoMemoryPurgeStatus)
 {}
 
 ContextGL::~ContextGL() {}
@@ -723,7 +726,15 @@ angle::Result ContextGL::multiDrawElementsInstancedBaseVertexBaseInstance(
 
 gl::GraphicsResetStatus ContextGL::getResetStatus()
 {
-    return mRenderer->getResetStatus();
+    gl::GraphicsResetStatus resetStatus = mRenderer->getResetStatus();
+    if (resetStatus == gl::GraphicsResetStatus::PurgedContextResetNV)
+    {
+        if (mRobustnessVideoMemoryPurgeStatus == RobustnessVideoMemoryPurgeStatus::NOT_REQUESTED)
+        {
+            resetStatus = gl::GraphicsResetStatus::UnknownContextReset;
+        }
+    }
+    return resetStatus;
 }
 
 std::string ContextGL::getVendorString() const

src/libANGLE/renderer/gl/ContextGL.h

@@ -31,12 +31,19 @@ class FunctionsGL;
 class RendererGL;
 class StateManagerGL;
 
+enum class RobustnessVideoMemoryPurgeStatus
+{
+    NOT_REQUESTED = 0,
+    REQUESTED     = 1,
+};
+
 class ContextGL : public ContextImpl
 {
   public:
     ContextGL(const gl::State &state,
               gl::ErrorSet *errorSet,
-              const std::shared_ptr<RendererGL> &renderer);
+              const std::shared_ptr<RendererGL> &renderer,
+              RobustnessVideoMemoryPurgeStatus robustnessVideoMemoryPurgeStatus);
     ~ContextGL() override;
 
     angle::Result initialize() override;
@@ -284,6 +291,8 @@ class ContextGL : public ContextImpl
 
   protected:
     std::shared_ptr<RendererGL> mRenderer;
+
+    RobustnessVideoMemoryPurgeStatus mRobustnessVideoMemoryPurgeStatus;
 };
 
 }  // namespace rx

src/libANGLE/renderer/gl/cgl/ContextCGL.cpp

@@ -21,7 +21,7 @@ ContextCGL::ContextCGL(DisplayCGL *display,
                        gl::ErrorSet *errorSet,
                        const std::shared_ptr<RendererGL> &renderer,
                        bool usesDiscreteGPU)
-    : ContextGL(state, errorSet, renderer),
+    : ContextGL(state, errorSet, renderer, RobustnessVideoMemoryPurgeStatus::NOT_REQUESTED),
       mUsesDiscreteGpu(usesDiscreteGPU),
       mReleasedDiscreteGpu(false)
 {

src/libANGLE/renderer/gl/eagl/ContextEAGL.cpp

@@ -20,7 +20,7 @@ namespace rx
 ContextEAGL::ContextEAGL(const gl::State &state,
                          gl::ErrorSet *errorSet,
                          const std::shared_ptr<RendererGL> &renderer)
-    : ContextGL(state, errorSet, renderer)
+    : ContextGL(state, errorSet, renderer, RobustnessVideoMemoryPurgeStatus::NOT_REQUESTED)
 {}
 
 }  // namespace rx

src/libANGLE/renderer/gl/egl/ContextEGL.cpp

@@ -10,8 +10,9 @@ namespace rx
 {
 ContextEGL::ContextEGL(const gl::State &state,
                        gl::ErrorSet *errorSet,
-                       const std::shared_ptr<RendererEGL> &renderer)
-    : ContextGL(state, errorSet, renderer), mRendererEGL(renderer)
+                       const std::shared_ptr<RendererEGL> &renderer,
+                       RobustnessVideoMemoryPurgeStatus robustnessVideoMemoryPurgeStatus)
+    : ContextGL(state, errorSet, renderer, robustnessVideoMemoryPurgeStatus), mRendererEGL(renderer)
 {}
 
 ContextEGL::~ContextEGL() {}

src/libANGLE/renderer/gl/egl/ContextEGL.h

@@ -19,7 +19,8 @@ class ContextEGL : public ContextGL
   public:
     ContextEGL(const gl::State &state,
                gl::ErrorSet *errorSet,
-               const std::shared_ptr<RendererEGL> &renderer);
+               const std::shared_ptr<RendererEGL> &renderer,
+               RobustnessVideoMemoryPurgeStatus robustnessVideoMemoryPurgeStatus);
     ~ContextEGL() override;
 
     EGLContext getContext() const;

src/libANGLE/renderer/gl/egl/DisplayEGL.cpp

@@ -27,6 +27,12 @@
 namespace
 {
 
+rx::RobustnessVideoMemoryPurgeStatus GetRobustnessVideoMemoryPurge(const egl::AttributeMap &attribs)
+{
+    return static_cast<rx::RobustnessVideoMemoryPurgeStatus>(
+        attribs.get(EGL_GENERATE_RESET_ON_VIDEO_MEMORY_PURGE_NV, GL_FALSE));
+}
+
 EGLint ESBitFromPlatformAttrib(const rx::FunctionsEGL *egl, const EGLAttrib platformAttrib)
 {
     EGLint esBit = EGL_NONE;
@@ -103,7 +109,12 @@ namespace rx
 {
 
 DisplayEGL::DisplayEGL(const egl::DisplayState &state)
-    : DisplayGL(state), mRenderer(nullptr), mEGL(nullptr), mConfig(EGL_NO_CONFIG_KHR)
+    : DisplayGL(state),
+      mRenderer(nullptr),
+      mEGL(nullptr),
+      mConfig(EGL_NO_CONFIG_KHR),
+      mHasEXTCreateContextRobustness(false),
+      mHasNVRobustnessVideoMemoryPurge(false)
 {}
 
 DisplayEGL::~DisplayEGL() {}
@@ -152,7 +163,7 @@ egl::Error DisplayEGL::initializeContext(EGLContext shareContext,
         if (initializeRequested)
         {
             contextAttribLists.push_back({EGL_CONTEXT_MAJOR_VERSION, requestedMajor,
-                                          EGL_CONTEXT_MINOR_VERSION, requestedMinor, EGL_NONE});
+                                          EGL_CONTEXT_MINOR_VERSION, requestedMinor});
         }
         else
         {
@@ -169,7 +180,7 @@ egl::Error DisplayEGL::initializeContext(EGLContext shareContext,
             {
                 contextAttribLists.push_back(
                     {EGL_CONTEXT_MAJOR_VERSION, static_cast<EGLint>(version.major),
-                     EGL_CONTEXT_MINOR_VERSION, static_cast<EGLint>(version.minor), EGL_NONE});
+                     EGL_CONTEXT_MINOR_VERSION, static_cast<EGLint>(version.minor)});
             }
         }
     }
@@ -179,12 +190,23 @@ egl::Error DisplayEGL::initializeContext(EGLContext shareContext,
         {
             return egl::EglBadAttribute() << "Unsupported requested context version";
         }
-        contextAttribLists.push_back({EGL_CONTEXT_CLIENT_VERSION, 2, EGL_NONE});
+        contextAttribLists.push_back({EGL_CONTEXT_CLIENT_VERSION, 2});
     }
 
     EGLContext context = EGL_NO_CONTEXT;
-    for (const auto &attribList : contextAttribLists)
+    for (auto &attribList : contextAttribLists)
     {
+        if (mHasEXTCreateContextRobustness)
+        {
+            attribList.push_back(EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY);
+            attribList.push_back(EGL_LOSE_CONTEXT_ON_RESET);
+            if (mHasNVRobustnessVideoMemoryPurge)
+            {
+                attribList.push_back(EGL_GENERATE_RESET_ON_VIDEO_MEMORY_PURGE_NV);
+                attribList.push_back(GL_TRUE);
+            }
+        }
+        attribList.push_back(EGL_NONE);
         context = mEGL->createContext(mConfig, shareContext, attribList.data());
         if (context != EGL_NO_CONTEXT)
         {
@@ -227,6 +249,9 @@ egl::Error DisplayEGL::initialize(egl::Display *display)
         }
     }
 
+    mHasEXTCreateContextRobustness   = mEGL->hasExtension("EGL_EXT_create_context_robustness");
+    mHasNVRobustnessVideoMemoryPurge = mEGL->hasExtension("EGL_NV_robustness_video_memory_purge");
+
     const EGLAttrib platformAttrib = mDisplayAttributes.get(EGL_PLATFORM_ANGLE_TYPE_ANGLE, 0);
     EGLint esBit                   = ESBitFromPlatformAttrib(mEGL, platformAttrib);
     if (esBit == EGL_NONE)
@@ -356,7 +381,9 @@ ContextImpl *DisplayEGL::createContext(const gl::State &state,
         return nullptr;
     }
 
-    return new ContextEGL(state, errorSet, renderer);
+    RobustnessVideoMemoryPurgeStatus robustnessVideoMemoryPurgeStatus =
+        GetRobustnessVideoMemoryPurge(attribs);
+    return new ContextEGL(state, errorSet, renderer, robustnessVideoMemoryPurgeStatus);
 }
 
 template <typename T>
@@ -683,6 +710,8 @@ void DisplayEGL::generateExtensions(egl::DisplayExtensions *outExtensions) const
     outExtensions->imageDmaBufImportModifiersEXT =
         mEGL->hasExtension("EGL_EXT_image_dma_buf_import_modifiers");
 
+    outExtensions->robustnessVideoMemoryPurgeNV = mHasNVRobustnessVideoMemoryPurge;
+
     DisplayGL::generateExtensions(outExtensions);
 }
 

src/libANGLE/renderer/gl/egl/DisplayEGL.h

@@ -141,6 +141,9 @@ class DisplayEGL : public DisplayGL
     void generateCaps(egl::Caps *outCaps) const override;
 
     std::map<EGLint, EGLint> mConfigIds;
+
+    bool mHasEXTCreateContextRobustness;
+    bool mHasNVRobustnessVideoMemoryPurge;
 };
 
 }  // namespace rx

src/libANGLE/renderer/gl/egl/android/DisplayAndroid.cpp

@@ -229,7 +229,8 @@ ContextImpl *DisplayAndroid::createContext(const gl::State &state,
         }
     }
 
-    return new ContextEGL(state, errorSet, renderer);
+    return new ContextEGL(state, errorSet, renderer,
+                          RobustnessVideoMemoryPurgeStatus::NOT_REQUESTED);
 }
 
 bool DisplayAndroid::isValidNativeWindow(EGLNativeWindowType window) const

src/libANGLE/renderer/gl/egl/gbm/DisplayGbm.cpp

@@ -912,7 +912,8 @@ ContextImpl *DisplayGbm::createContext(const gl::State &state,
                                        const egl::AttributeMap &attribs)
 {
     // All contexts on Gbm are virtualized and share the same renderer.
-    return new ContextEGL(state, errorSet, mRenderer);
+    return new ContextEGL(state, errorSet, mRenderer,
+                          RobustnessVideoMemoryPurgeStatus::NOT_REQUESTED);
 }
 
 egl::Error DisplayGbm::makeCurrent(egl::Display *display,

src/libANGLE/renderer/gl/glx/DisplayGLX.cpp

@@ -29,6 +29,12 @@
 namespace
 {
 
+rx::RobustnessVideoMemoryPurgeStatus GetRobustnessVideoMemoryPurge(const egl::AttributeMap &attribs)
+{
+    return static_cast<rx::RobustnessVideoMemoryPurgeStatus>(
+        attribs.get(GLX_GENERATE_RESET_ON_VIDEO_MEMORY_PURGE_NV, GL_FALSE));
+}
+
 bool HasParallelShaderCompileExtension(const rx::FunctionsGL *functions)
 {
     return functions->maxShaderCompilerThreadsKHR != nullptr ||
@@ -76,6 +82,7 @@ DisplayGLX::DisplayGLX(const egl::DisplayState &state)
       mHasARBCreateContextProfile(false),
       mHasARBCreateContextRobustness(false),
       mHasEXTCreateContextES2Profile(false),
+      mHasNVRobustnessVideoMemoryPurge(false),
       mSwapControl(SwapControl::Absent),
       mMinSwapInterval(0),
       mMaxSwapInterval(0),
@@ -115,8 +122,9 @@ egl::Error DisplayGLX::initialize(egl::Display *display)
     mHasMultisample             = mGLX.minorVersion > 3 || mGLX.hasExtension("GLX_ARB_multisample");
     mHasARBCreateContext        = mGLX.hasExtension("GLX_ARB_create_context");
     mHasARBCreateContextProfile = mGLX.hasExtension("GLX_ARB_create_context_profile");
-    mHasARBCreateContextRobustness = mGLX.hasExtension("GLX_ARB_create_context_robustness");
-    mHasEXTCreateContextES2Profile = mGLX.hasExtension("GLX_EXT_create_context_es2_profile");
+    mHasARBCreateContextRobustness   = mGLX.hasExtension("GLX_ARB_create_context_robustness");
+    mHasEXTCreateContextES2Profile   = mGLX.hasExtension("GLX_EXT_create_context_es2_profile");
+    mHasNVRobustnessVideoMemoryPurge = mGLX.hasExtension("GLX_NV_robustness_video_memory_purge");
 
     std::string clientVendor = mGLX.getClientString(GLX_VENDOR);
     mIsMesa                  = clientVendor.find("Mesa") != std::string::npos;
@@ -285,7 +293,14 @@ egl::Error DisplayGLX::initialize(egl::Display *display)
 
     std::unique_ptr<FunctionsGL> functionsGL(new FunctionsGLGLX(mGLX.getProc));
     functionsGL->initialize(eglAttributes);
-
+    if (mHasNVRobustnessVideoMemoryPurge)
+    {
+        GLenum status = functionsGL->getGraphicsResetStatus();
+        if (status != GL_NO_ERROR && status != GL_PURGED_CONTEXT_RESET_NV)
+        {
+            return egl::EglNotInitialized() << "Context lost for unknown reason.";
+        }
+    }
     // TODO(cwallez, angleproject:1303) Disable the OpenGL ES backend on Linux NVIDIA and Intel as
     // it has problems on our automated testing. An OpenGL ES backend might not trigger this test if
     // there is no Desktop OpenGL support, but that's not the case in our automated testing.
@@ -475,7 +490,9 @@ ContextImpl *DisplayGLX::createContext(const gl::State &state,
                                        const gl::Context *shareContext,
                                        const egl::AttributeMap &attribs)
 {
-    return new ContextGL(state, errorSet, mRenderer);
+    RobustnessVideoMemoryPurgeStatus robustnessVideoMemoryPurgeStatus =
+        GetRobustnessVideoMemoryPurge(attribs);
+    return new ContextGL(state, errorSet, mRenderer, robustnessVideoMemoryPurgeStatus);
 }
 
 DeviceImpl *DisplayGLX::createDevice()
@@ -895,6 +912,8 @@ void DisplayGLX::generateExtensions(egl::DisplayExtensions *outExtensions) const
 
     outExtensions->textureFromPixmapNOK = mGLX.hasExtension("GLX_EXT_texture_from_pixmap");
 
+    outExtensions->robustnessVideoMemoryPurgeNV = mHasNVRobustnessVideoMemoryPurge;
+
     DisplayGL::generateExtensions(outExtensions);
 }
 
@@ -930,6 +949,11 @@ egl::Error DisplayGLX::createContextAttribs(glx::FBConfig,
         mAttribs.push_back(GLX_CONTEXT_ROBUST_ACCESS_BIT_ARB);
         mAttribs.push_back(GLX_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB);
         mAttribs.push_back(GLX_LOSE_CONTEXT_ON_RESET_ARB);
+        if (mHasNVRobustnessVideoMemoryPurge)
+        {
+            mAttribs.push_back(GLX_GENERATE_RESET_ON_VIDEO_MEMORY_PURGE_NV);
+            mAttribs.push_back(GL_TRUE);
+        }
     }
 
     if (version.valid())

src/libANGLE/renderer/gl/glx/DisplayGLX.h

@@ -140,6 +140,7 @@ class DisplayGLX : public DisplayGL
     bool mHasARBCreateContextProfile;
     bool mHasARBCreateContextRobustness;
     bool mHasEXTCreateContextES2Profile;
+    bool mHasNVRobustnessVideoMemoryPurge;
 
     enum class SwapControl
     {

src/libANGLE/renderer/gl/glx/platform_glx.h

@@ -163,6 +163,10 @@
 // GLX_EXT_swap_control
 #    define GLX_SWAP_INTERVAL_EXT 0x20F1
 #    define GLX_MAX_SWAP_INTERVAL_EXT 0x20F2
+
+// GLX_NV_robustness_video_memory_purge
+#    define GLX_GENERATE_RESET_ON_VIDEO_MEMORY_PURGE_NV 0x20F7
+
 #endif  // !defined(ANGLE_SKIP_GLX_DEFINES)
 
 // GLX typedefs depend on the X headers

src/libANGLE/renderer/gl/wgl/ContextWGL.cpp

@@ -11,7 +11,8 @@ namespace rx
 ContextWGL::ContextWGL(const gl::State &state,
                        gl::ErrorSet *errorSet,
                        const std::shared_ptr<RendererWGL> &renderer)
-    : ContextGL(state, errorSet, renderer), mRendererWGL(renderer)
+    : ContextGL(state, errorSet, renderer, RobustnessVideoMemoryPurgeStatus::NOT_REQUESTED),
+      mRendererWGL(renderer)
 {}
 
 ContextWGL::~ContextWGL() {}

src/libANGLE/validationEGL.cpp

@@ -1405,6 +1405,20 @@ Error ValidateCreateContext(Display *display,
                 }
                 break;
 
+            case EGL_GENERATE_RESET_ON_VIDEO_MEMORY_PURGE_NV:
+                if (!display->getExtensions().robustnessVideoMemoryPurgeNV)
+                {
+                    return EglBadAttribute()
+                           << "Attribute EGL_GENERATE_RESET_ON_VIDEO_MEMORY_PURGE_NV requires "
+                              "extension EGL_NV_robustness_video_memory_purge.";
+                }
+                if (value != EGL_TRUE && value != EGL_FALSE)
+                {
+                    return EglBadAttribute() << "EGL_GENERATE_RESET_ON_VIDEO_MEMORY_PURGE_NV must "
+                                                "be either EGL_TRUE or EGL_FALSE.";
+                }
+                break;
+
             default:
                 return EglBadAttribute() << "Unknown attribute.";
         }