gl: Unify DirectConnected functions

* Partial undo of hrev43864 - 3dmov
  I was using an old GL renderer. After my indirect
  GL fix, this started working well without direct
  rendering. (sorry for the spam)
* Clean up the other GL DirectConnected functions
  Make it easy for know what to disable to toggle
  Direct Rendering.

src/add-ons/screen_savers/flurry/Flurry.cpp

@@ -351,7 +351,7 @@ Flurry::StartSaver(BView* view, bool preview)
 void
 Flurry::StopSaver()
 {
-	if (fFlurryView)
+	if (fFlurryView != NULL)
 		fFlurryView->EnableDirectMode(false);
 }
 
@@ -366,10 +366,13 @@ Flurry::DirectDraw(int32 frame)
 void
 Flurry::DirectConnected(direct_buffer_info* info)
 {
-	if (fFlurryView) {
+	// Enable or disable direct rendering
+	#if 1
+	if (fFlurryView != NULL) {
 		fFlurryView->DirectConnected(info);
 		fFlurryView->EnableDirectMode(true);
 	}
+	#endif
 }
 
 

src/apps/3dmov/MainWindow.cpp

@@ -200,10 +200,14 @@ bool MainWindow :: QuitRequested()
 */
 void MainWindow :: DirectConnected(direct_buffer_info *info)
 {
+	// TODO: Direct rendering causes mouse to flicker due to lack
+	// of a hardware cursor.
+	#if 0
 	if (fCurrentView != NULL) {
 		fCurrentView->DirectConnected(info);
 		fCurrentView->EnableDirectMode(true);
 	}
+	#endif
 }
 
 /*	FUNCTION:		animation_thread

src/apps/glteapot/TeapotWindow.cpp

@@ -213,10 +213,15 @@ TeapotWindow::QuitRequested()
 void
 TeapotWindow::DirectConnected(direct_buffer_info* info)
 {
+	// TODO: Direct rendering causes the mouse to flicker due
+	// to the lack of a Hardware Cursor, however without
+	// it the teapot freezes on mouse move. (bug?)
+	#if 1
 	if (fObjectView != NULL) {
 		fObjectView->DirectConnected(info);
 		fObjectView->EnableDirectMode(true);
 	}
+	#endif
 }