Various Mac fixes

interface/src/main.cpp

@@ -144,25 +144,33 @@ int main(int argc, const char* argv[]) {
 #endif
     }
 
+
+    // FIXME this method of checking the OpenGL version screws up the `QOpenGLContext::globalShareContext()` value, which in turn
+    // leads to crashes when creating the real OpenGL instance.  Disabling for now until we come up with a better way of checking
+    // the GL version on the system without resorting to creating a full Qt application
+#if 0
     // Check OpenGL version.
     // This is done separately from the main Application so that start-up and shut-down logic within the main Application is
     // not made more complicated than it already is.
-    bool override = false;
+    bool overrideGLCheck = false;
+
     QJsonObject glData;
     {
         OpenGLVersionChecker openGLVersionChecker(argc, const_cast<char**>(argv));
         bool valid = true;
-        glData = openGLVersionChecker.checkVersion(valid, override);
+        glData = openGLVersionChecker.checkVersion(valid, overrideGLCheck);
         if (!valid) {
-            if (override) {
+            if (overrideGLCheck) {
                 auto glVersion = glData["version"].toString();
-                qCDebug(interfaceapp, "Running on insufficient OpenGL version: %s.", glVersion.toStdString().c_str());
+                qCWarning(interfaceapp, "Running on insufficient OpenGL version: %s.", glVersion.toStdString().c_str());
             } else {
-                qCDebug(interfaceapp, "Early exit due to OpenGL version.");
+                qCWarning(interfaceapp, "Early exit due to OpenGL version.");
                 return 0;
             }
         }
     }
+#endif
+
 
     // Debug option to demonstrate that the client's local time does not
     // need to be in sync with any other network node. This forces clock
@@ -223,8 +231,9 @@ int main(int argc, const char* argv[]) {
 
         Application app(argcExtended, const_cast<char**>(argvExtended.data()), startupTime, runningMarkerExisted);
 
+#if 0
         // If we failed the OpenGLVersion check, log it.
-        if (override) {
+        if (overrideGLcheck) {
             auto accountManager = DependencyManager::get<AccountManager>();
             if (accountManager->isLoggedIn()) {
                 UserActivityLogger::getInstance().insufficientGLVersion(glData);
@@ -238,6 +247,8 @@ int main(int argc, const char* argv[]) {
                 });
             }
         }
+#endif
+        
 
         // Setup local server
         QLocalServer server { &app };

libraries/entities-renderer/src/EntityTreeRenderer.cpp

@@ -91,7 +91,12 @@ void entitiesScriptEngineDeleter(ScriptEngine* engine) {
     };
 
     // Wait for the scripting thread from the thread pool to avoid hanging the main thread
-    QThreadPool::globalInstance()->start(new WaitRunnable(engine));
+    auto threadPool = QThreadPool::globalInstance();
+    if (threadPool) {
+        threadPool->start(new WaitRunnable(engine));
+    } else {
+        delete engine;
+    }
 }
 
 void EntityTreeRenderer::resetEntitiesScriptEngine() {

libraries/gl/src/gl/GLHelpers.cpp

@@ -40,8 +40,11 @@ const QSurfaceFormat& getDefaultOpenGLSurfaceFormat() {
 
 int glVersionToInteger(QString glVersion) {
     QStringList versionParts = glVersion.split(QRegularExpression("[\\.\\s]"));
-    int majorNumber = versionParts[0].toInt();
-    int minorNumber = versionParts[1].toInt();
+    int majorNumber = 0, minorNumber = 0;
+    if (versionParts.size() >= 2) {
+        majorNumber = versionParts[0].toInt();
+        minorNumber = versionParts[1].toInt();
+    }
     return (majorNumber << 16) | minorNumber;
 }
 

libraries/gpu-gl/src/gpu/gl/GLTexture.cpp

@@ -467,12 +467,14 @@ void GLVariableAllocationSupport::updateMemoryPressure() {
         _demoteQueue = WorkQueue();
 
         // Populate the existing textures into the queue
-        for (const auto& texture : strongTextures) {
-            // Race conditions can still leave nulls in the list, so we need to check
-            if (!texture) {
-                continue;
+        if (_memoryPressureState != MemoryPressureState::Idle) {
+            for (const auto& texture : strongTextures) {
+                // Race conditions can still leave nulls in the list, so we need to check
+                if (!texture) {
+                    continue;
+                }
+                addToWorkQueue(texture);
             }
-            addToWorkQueue(texture);
         }
     }
 }

libraries/ui/src/ui/OffscreenQmlSurface.cpp

@@ -528,6 +528,12 @@ void OffscreenQmlSurface::create() {
 
     connect(_quickWindow, &QQuickWindow::focusObjectChanged, this, &OffscreenQmlSurface::onFocusObjectChanged);
 
+    // acquireEngine interrogates the GL context, so we need to have the context current here
+    if (!_canvas->makeCurrent()) {
+        qFatal("Failed to make context current for QML Renderer");
+        return;
+    }
+    
     // Create a QML engine.
     auto qmlEngine = acquireEngine(_quickWindow);
 
@@ -540,11 +546,6 @@ void OffscreenQmlSurface::create() {
     // FIXME Compatibility mechanism for existing HTML and JS that uses eventBridgeWrapper
     // Find a way to flag older scripts using this mechanism and wanr that this is deprecated
     _qmlContext->setContextProperty("eventBridgeWrapper", new EventBridgeWrapper(this, _qmlContext));
-
-    if (!_canvas->makeCurrent()) {
-        qWarning("Failed to make context current for QML Renderer");
-        return;
-    }
     _renderControl->initialize(_canvas->getContext());
 
     // When Quick says there is a need to render, we will not render immediately. Instead,