diff --git a/libs/graphicsenv/GraphicsEnv.cpp b/libs/graphicsenv/GraphicsEnv.cpp
index dfdda0c..9dc7431 100644
--- a/libs/graphicsenv/GraphicsEnv.cpp
+++ b/libs/graphicsenv/GraphicsEnv.cpp
@@ -19,6 +19,7 @@
 #include <graphicsenv/GraphicsEnv.h>
 
 #include <dlfcn.h>
+#include <unistd.h>
 
 #include <android-base/file.h>
 #include <android-base/properties.h>
@@ -28,7 +29,11 @@
 #include <log/log.h>
 #include <sys/prctl.h>
 
+#include <memory>
 #include <mutex>
+#include <string>
+
+#include <dlfcn.h>
 
 // TODO(b/37049319) Get this from a header once one exists
 extern "C" {
@@ -46,6 +51,20 @@
 };
 }
 
+// TODO(ianelliott@): Get the following from an ANGLE header:
+#define CURRENT_ANGLE_API_VERSION 2 // Current API verion we are targetting
+// Version-2 API:
+typedef bool (*fpANGLEGetFeatureSupportUtilAPIVersion)(unsigned int* versionToUse);
+typedef bool (*fpANGLEAndroidParseRulesString)(const char* rulesString, void** rulesHandle,
+                                               int* rulesVersion);
+typedef bool (*fpANGLEGetSystemInfo)(void** handle);
+typedef bool (*fpANGLEAddDeviceInfoToSystemInfo)(const char* deviceMfr, const char* deviceModel,
+                                                 void* handle);
+typedef bool (*fpANGLEShouldBeUsedForApplication)(void* rulesHandle, int rulesVersion,
+                                                  void* systemInfoHandle, const char* appName);
+typedef bool (*fpANGLEFreeRulesHandle)(void* handle);
+typedef bool (*fpANGLEFreeSystemInfoHandle)(void* handle);
+
 namespace android {
 
 enum NativeLibrary {
@@ -134,39 +153,186 @@
     mDriverPath = path;
 }
 
+void* GraphicsEnv::loadLibrary(std::string name) {
+    const android_dlextinfo dlextinfo = {
+            .flags = ANDROID_DLEXT_USE_NAMESPACE,
+            .library_namespace = getAngleNamespace(),
+    };
+
+    std::string libName = std::string("lib") + name + "_angle.so";
+
+    void* so = android_dlopen_ext(libName.c_str(), RTLD_LOCAL | RTLD_NOW, &dlextinfo);
+
+    if (so) {
+        ALOGD("dlopen_ext from APK (%s) success at %p", libName.c_str(), so);
+        return so;
+    } else {
+        ALOGE("dlopen_ext(\"%s\") failed: %s", libName.c_str(), dlerror());
+    }
+
+    return nullptr;
+}
+
+bool GraphicsEnv::checkAngleRules(void* so) {
+    char manufacturer[PROPERTY_VALUE_MAX];
+    char model[PROPERTY_VALUE_MAX];
+    property_get("ro.product.manufacturer", manufacturer, "UNSET");
+    property_get("ro.product.model", model, "UNSET");
+
+    auto ANGLEGetFeatureSupportUtilAPIVersion =
+            (fpANGLEGetFeatureSupportUtilAPIVersion)dlsym(so,
+                                                          "ANGLEGetFeatureSupportUtilAPIVersion");
+
+    if (!ANGLEGetFeatureSupportUtilAPIVersion) {
+        ALOGW("Cannot find ANGLEGetFeatureSupportUtilAPIVersion function");
+        return false;
+    }
+
+    // Negotiate the interface version by requesting most recent known to the platform
+    unsigned int versionToUse = CURRENT_ANGLE_API_VERSION;
+    if (!(ANGLEGetFeatureSupportUtilAPIVersion)(&versionToUse)) {
+        ALOGW("Cannot use ANGLE feature-support library, it is older than supported by EGL, "
+              "requested version %u",
+              versionToUse);
+        return false;
+    }
+
+    // Add and remove versions below as needed
+    bool useAngle = false;
+    switch (versionToUse) {
+        case 2: {
+            ALOGV("Using version %d of ANGLE feature-support library", versionToUse);
+            void* rulesHandle = nullptr;
+            int rulesVersion = 0;
+            void* systemInfoHandle = nullptr;
+
+            // Get the symbols for the feature-support-utility library:
+#define GET_SYMBOL(symbol)                                                 \
+    fp##symbol symbol = (fp##symbol)dlsym(so, #symbol);                    \
+    if (!symbol) {                                                         \
+        ALOGW("Cannot find " #symbol " in ANGLE feature-support library"); \
+        break;                                                             \
+    }
+            GET_SYMBOL(ANGLEAndroidParseRulesString);
+            GET_SYMBOL(ANGLEGetSystemInfo);
+            GET_SYMBOL(ANGLEAddDeviceInfoToSystemInfo);
+            GET_SYMBOL(ANGLEShouldBeUsedForApplication);
+            GET_SYMBOL(ANGLEFreeRulesHandle);
+            GET_SYMBOL(ANGLEFreeSystemInfoHandle);
+
+            // Parse the rules, obtain the SystemInfo, and evaluate the
+            // application against the rules:
+            if (!(ANGLEAndroidParseRulesString)(mRulesBuffer.data(), &rulesHandle, &rulesVersion)) {
+                ALOGW("ANGLE feature-support library cannot parse rules file");
+                break;
+            }
+            if (!(ANGLEGetSystemInfo)(&systemInfoHandle)) {
+                ALOGW("ANGLE feature-support library cannot obtain SystemInfo");
+                break;
+            }
+            if (!(ANGLEAddDeviceInfoToSystemInfo)(manufacturer, model, systemInfoHandle)) {
+                ALOGW("ANGLE feature-support library cannot add device info to SystemInfo");
+                break;
+            }
+            useAngle = (ANGLEShouldBeUsedForApplication)(rulesHandle, rulesVersion,
+                                                         systemInfoHandle, mAngleAppName.c_str());
+            (ANGLEFreeRulesHandle)(rulesHandle);
+            (ANGLEFreeSystemInfoHandle)(systemInfoHandle);
+        } break;
+
+        default:
+            ALOGW("Version %u of ANGLE feature-support library is NOT supported.", versionToUse);
+    }
+
+    ALOGV("Close temporarily-loaded ANGLE opt-in/out logic");
+    return useAngle;
+}
+
+bool GraphicsEnv::shouldUseAngle(std::string appName) {
+    if (appName != mAngleAppName) {
+        // Make sure we are checking the app we were init'ed for
+        ALOGE("App name does not match: expected '%s', got '%s'", mAngleAppName.c_str(),
+              appName.c_str());
+        return false;
+    }
+
+    return shouldUseAngle();
+}
+
+bool GraphicsEnv::shouldUseAngle() {
+    // Make sure we are init'ed
+    if (mAngleAppName.empty()) {
+        ALOGE("App name is empty. setAngleInfo() must be called first to enable ANGLE.");
+        return false;
+    }
+
+    return mUseAngle;
+}
+
+void GraphicsEnv::updateUseAngle() {
+    mUseAngle = false;
+
+    const char* ANGLE_PREFER_ANGLE = "angle";
+    const char* ANGLE_PREFER_NATIVE = "native";
+
+    if (mAngleDeveloperOptIn == ANGLE_PREFER_ANGLE) {
+        ALOGV("User set \"Developer Options\" to force the use of ANGLE");
+        mUseAngle = true;
+    } else if (mAngleDeveloperOptIn == ANGLE_PREFER_NATIVE) {
+        ALOGV("User set \"Developer Options\" to force the use of Native");
+        mUseAngle = false;
+    } else {
+        // The "Developer Options" value wasn't set to force the use of ANGLE.  Need to temporarily
+        // load ANGLE and call the updatable opt-in/out logic:
+
+        // Check if ANGLE is enabled. Workaround for several bugs:
+        // b/119305693 b/119322355 b/119305887
+        // Something is not working correctly in the feature library
+        char prop[PROPERTY_VALUE_MAX];
+        property_get("debug.angle.enable", prop, "0");
+        void* featureSo = nullptr;
+        if (atoi(prop)) {
+            featureSo = loadLibrary("feature_support");
+        }
+        if (featureSo) {
+            ALOGV("loaded ANGLE's opt-in/out logic from namespace");
+            mUseAngle = checkAngleRules(featureSo);
+            dlclose(featureSo);
+            featureSo = nullptr;
+        } else {
+            ALOGV("Could not load the ANGLE opt-in/out logic, cannot use ANGLE.");
+        }
+    }
+}
+
 void GraphicsEnv::setAngleInfo(const std::string path, const std::string appName,
                                const std::string developerOptIn, const int rulesFd,
                                const long rulesOffset, const long rulesLength) {
-    if (!mAnglePath.empty()) {
-        ALOGV("ignoring attempt to change ANGLE path from '%s' to '%s'", mAnglePath.c_str(),
-              path.c_str());
-    } else {
-        ALOGV("setting ANGLE path to '%s'", path.c_str());
-        mAnglePath = path;
-    }
+    ALOGV("setting ANGLE path to '%s'", path.c_str());
+    mAnglePath = path;
+    ALOGV("setting ANGLE app name to '%s'", appName.c_str());
+    mAngleAppName = appName;
+    ALOGV("setting ANGLE application opt-in to '%s'", developerOptIn.c_str());
+    mAngleDeveloperOptIn = developerOptIn;
 
-    if (!mAngleAppName.empty()) {
-        ALOGV("ignoring attempt to change ANGLE app name from '%s' to '%s'", mAngleAppName.c_str(),
-              appName.c_str());
-    } else {
-        ALOGV("setting ANGLE app name to '%s'", appName.c_str());
-        mAngleAppName = appName;
+    lseek(rulesFd, rulesOffset, SEEK_SET);
+    mRulesBuffer = std::vector<char>(rulesLength + 1);
+    ssize_t numBytesRead = read(rulesFd, mRulesBuffer.data(), rulesLength);
+    if (numBytesRead < 0) {
+        ALOGE("Cannot read rules file: numBytesRead = %zd", numBytesRead);
+        numBytesRead = 0;
+    } else if (numBytesRead == 0) {
+        ALOGW("Empty rules file");
     }
-
-    if (!mAngleDeveloperOptIn.empty()) {
-        ALOGV("ignoring attempt to change ANGLE application opt-in from '%s' to '%s'",
-              mAngleDeveloperOptIn.c_str(), developerOptIn.c_str());
-    } else {
-        ALOGV("setting ANGLE application opt-in to '%s'", developerOptIn.c_str());
-        mAngleDeveloperOptIn = developerOptIn;
+    if (numBytesRead != rulesLength) {
+        ALOGW("Did not read all of the necessary bytes from the rules file."
+              "expected: %ld, got: %zd",
+              rulesLength, numBytesRead);
     }
+    mRulesBuffer[numBytesRead] = '\0';
 
-    ALOGV("setting ANGLE rules file descriptor to '%i'", rulesFd);
-    mAngleRulesFd = rulesFd;
-    ALOGV("setting ANGLE rules offset to '%li'", rulesOffset);
-    mAngleRulesOffset = rulesOffset;
-    ALOGV("setting ANGLE rules length to '%li'", rulesLength);
-    mAngleRulesLength = rulesLength;
+    // Update the current status of whether we should use ANGLE or not
+    updateUseAngle();
 }
 
 void GraphicsEnv::setLayerPaths(NativeLoaderNamespace* appNamespace, const std::string layerPaths) {
@@ -183,25 +349,8 @@
     return mAppNamespace;
 }
 
-const char* GraphicsEnv::getAngleAppName() {
-    if (mAngleAppName.empty()) return nullptr;
-    return mAngleAppName.c_str();
-}
-
-const char* GraphicsEnv::getAngleDeveloperOptIn() {
-    return mAngleDeveloperOptIn.c_str();
-}
-
-int GraphicsEnv::getAngleRulesFd() {
-    return mAngleRulesFd;
-}
-
-long GraphicsEnv::getAngleRulesOffset() {
-    return mAngleRulesOffset;
-}
-
-long GraphicsEnv::getAngleRulesLength() {
-    return mAngleRulesLength;
+std::string& GraphicsEnv::getAngleAppName() {
+    return mAngleAppName;
 }
 
 const std::string& GraphicsEnv::getLayerPaths() {