[GPU] Public swap callback function

src/xenia/gpu/command_processor.h

@@ -126,7 +126,7 @@ class CommandProcessor {
   void IssueSwap(uint32_t frontbuffer_ptr, uint32_t frontbuffer_width,
                  uint32_t frontbuffer_height);
 
-  void set_swap_request_handler(std::function<void()> fn) {
+  void SetSwapCallback(std::function<void()> fn) {
     swap_request_handler_ = fn;
   }
 

src/xenia/gpu/graphics_system.cc

@@ -54,8 +54,6 @@ X_STATUS GraphicsSystem::Setup(
     return X_STATUS_UNSUCCESSFUL;
   }
 
-  command_processor_->set_swap_request_handler([]() {});
-
   // Let the processor know we want register access callbacks.
   memory_->AddVirtualMappedRange(
       0x7FC80000, 0xFFFF0000, 0x0000FFFF, this,
@@ -113,6 +111,10 @@ void GraphicsSystem::Reset() {
   xe::FatalError("Graphics device lost (probably due to an internal error)");
 }
 
+void GraphicsSystem::SetSwapCallback(std::function<void()> fn) {
+  command_processor_->SetSwapCallback(fn);
+}
+
 uint32_t GraphicsSystem::ReadRegisterThunk(void* ppc_context,
                                            GraphicsSystem* gs, uint32_t addr) {
   return gs->ReadRegister(addr);

src/xenia/gpu/graphics_system.h

@@ -62,6 +62,8 @@ class GraphicsSystem {
 
   virtual void ClearCaches();
 
+  void SetSwapCallback(std::function<void()> fn);
+
   void RequestFrameTrace();
   void BeginTracing();
   void EndTracing();