rsx: Throw if user attempts to use Vulkan/DX12 without driver support

rpcs3/Emu/RSX/D3D12/D3D12GSRender.cpp

@@ -177,7 +177,17 @@ D3D12GSRender::D3D12GSRender()
 		}
 	}
 
-	CHECK_HRESULT(wrapD3D12CreateDevice(adapter.Get(), D3D_FEATURE_LEVEL_11_0, IID_PPV_ARGS(&m_device)));
+	if (FAILED(wrapD3D12CreateDevice(adapter.Get(), D3D_FEATURE_LEVEL_11_0, IID_PPV_ARGS(&m_device))))
+	{
+		LOG_ERROR(RSX, "Failed to initialize D3D device on adapter '%s', falling back to first available GPU", g_cfg_d3d12_adapter.to_string().c_str());
+		
+		//Try to create a device on the first available device
+		if (FAILED(wrapD3D12CreateDevice(NULL, D3D_FEATURE_LEVEL_11_0, IID_PPV_ARGS(&m_device))))
+		{
+			LOG_FATAL(RSX, "Unable to create D3D12 device. Your GPU(s) may not have D3D12 support.");
+			return;
+		}
+	}
 
 	// Queues
 	D3D12_COMMAND_QUEUE_DESC graphic_queue_desc = { D3D12_COMMAND_LIST_TYPE_DIRECT };
@@ -263,6 +273,12 @@ D3D12GSRender::D3D12GSRender()
 
 D3D12GSRender::~D3D12GSRender()
 {
+	if (!m_device)
+	{
+		//Initialization must have failed
+		return;
+	}
+
 	wait_for_command_queue(m_device.Get(), m_command_queue.Get());
 
 	m_texture_cache.unprotect_all();
@@ -275,6 +291,15 @@ D3D12GSRender::~D3D12GSRender()
 	release_d2d_structures();
 }
 
+void D3D12GSRender::on_init_thread()
+{
+	if (!m_device)
+	{
+		//Init must have failed
+		fmt::throw_exception("No D3D12 device was created");
+	}
+}
+
 void D3D12GSRender::on_exit()
 {
 	return GSRender::on_exit();

rpcs3/Emu/RSX/D3D12/D3D12GSRender.h

@@ -173,6 +173,7 @@ private:
 	void copy_render_target_to_dma_location();
 
 protected:
+	virtual void on_init_thread() override;
 	virtual void on_exit() override;
 	virtual bool do_method(u32 cmd, u32 arg) override;
 	virtual void end() override;

rpcs3/Emu/RSX/VK/VKGSRender.cpp

@@ -460,7 +460,17 @@ VKGSRender::VKGSRender() : GSRender(frame_type::Vulkan)
 	HINSTANCE hInstance = NULL;
 	HWND hWnd = (HWND)m_frame->handle();
 
-	std::vector<vk::physical_device>& gpus = m_thread_context.enumerateDevices();
+	std::vector<vk::physical_device>& gpus = m_thread_context.enumerateDevices();	
+	
+	//Actually confirm  that the loader found at least one compatible device
+	if (gpus.size() == 0)
+	{
+		//We can't throw in Emulator::Load, so we show error and return
+		LOG_FATAL(RSX, "Could not find a vulkan compatible GPU driver. Your GPU(s) may not support Vulkan, or you need to install the vulkan runtime and drivers");
+		m_device = VK_NULL_HANDLE;
+		return;
+	}
+
 	m_swap_chain = m_thread_context.createSwapChain(hInstance, hWnd, gpus[0]);
 #endif
 
@@ -543,6 +553,12 @@ VKGSRender::VKGSRender() : GSRender(frame_type::Vulkan)
 
 VKGSRender::~VKGSRender()
 {
+	if (m_device == VK_NULL_HANDLE)
+	{
+		//Initialization failed
+		return;
+	}
+
 	//Wait for queue
 	vkQueueWaitIdle(m_swap_chain->get_present_queue());
 
@@ -844,6 +860,11 @@ void VKGSRender::set_viewport()
 
 void VKGSRender::on_init_thread()
 {
+	if (m_device == VK_NULL_HANDLE)
+	{
+		fmt::throw_exception("No vulkan device was created");
+	}
+
 	GSRender::on_init_thread();
 	m_attrib_ring_info.init(8 * RING_BUFFER_SIZE);
 	m_attrib_ring_info.heap.reset(new vk::buffer(*m_device, 8 * RING_BUFFER_SIZE, m_memory_type_mapping.host_visible_coherent, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT|VK_MEMORY_PROPERTY_HOST_COHERENT_BIT, VK_BUFFER_USAGE_UNIFORM_TEXEL_BUFFER_BIT, 0));