Experimenting with vertex pipeline.

src/xenia/gpu/gl4/gl4_graphics_system.cc

@@ -11,6 +11,7 @@
 
 #include <poly/threading.h>
 #include <xenia/cpu/processor.h>
+#include <xenia/gpu/gl4/gl4_gpu-private.h>
 #include <xenia/gpu/gpu-private.h>
 
 namespace xe {
@@ -42,11 +43,19 @@ X_STATUS GL4GraphicsSystem::Setup() {
     control_ = std::make_unique<WGLControl>(loop);
     emulator_->main_window()->AddChild(control_.get());
 
+    if (FLAGS_thread_safe_gl) {
+      control_->context()->MakeCurrent();
+    }
+
     // Setup the GL context the command processor will do all its drawing in.
     // It's shared with the control context so that we can resolve framebuffers
     // from it.
     processor_context = control_->context()->CreateShared();
 
+    if (FLAGS_thread_safe_gl) {
+      control_->context()->ClearCurrent();
+    }
+
     control_ready_fence.Signal();
   });
   control_ready_fence.Wait();