UI: Massive revamp, new features and improvements

src/core/gpu_sw.h

@@ -7,6 +7,11 @@
 #include <memory>
 #include <vector>
 
+namespace Threading
+{
+class Thread;
+}
+
 class HostDisplayTexture;
 
 class GPU_SW final : public GPU
@@ -15,9 +20,11 @@ public:
   GPU_SW();
   ~GPU_SW() override;
 
+  ALWAYS_INLINE const GPU_SW_Backend& GetBackend() const { return m_backend; }
+
   GPURenderer GetRendererType() const override;
 
-  bool Initialize(HostDisplay* host_display) override;
+  bool Initialize() override;
   bool DoState(StateWrapper& sw, HostDisplayTexture** host_texture, bool update_display) override;
   void Reset(bool clear_vram) override;
   void UpdateSettings() override;