[win32] Use single ImGui context; get DXGI adapter descriptions

src/kiero/d3d11_impl.cpp

@@ -18,6 +18,7 @@ static Present oPresent = NULL;
 long __stdcall hkPresent11(IDXGISwapChain* pSwapChain, UINT SyncInterval, UINT Flags)
 {
 	static bool init = false;
+	auto prev_ctx = ImGui::GetCurrentContext();
 
 	if (!init)
 	{
@@ -30,12 +31,15 @@ long __stdcall hkPresent11(IDXGISwapChain* pSwapChain, UINT SyncInterval, UINT F
 		ID3D11DeviceContext* context;
 		device->GetImmediateContext(&context);
 
-		ImGui::CreateContext();
+		imgui_create(context, device);
+		ImGui::SetCurrentContext(state.imgui_ctx);
 		ImGui_ImplWin32_Init(desc.OutputWindow);
 		ImGui_ImplDX11_Init(device, context);
-		imgui_create(context);
 		init = true;
 	}
+
+	ImGui::SetCurrentContext(state.imgui_ctx);
+
 	update_hud_info(sw_stats, params, vendorID);
 	ImGui_ImplDX11_NewFrame();
 	ImGui_ImplWin32_NewFrame();
@@ -47,6 +51,8 @@ long __stdcall hkPresent11(IDXGISwapChain* pSwapChain, UINT SyncInterval, UINT F
 	ImGui::Render();
 	ImGui_ImplDX11_RenderDrawData(ImGui::GetDrawData());
 
+	ImGui::SetCurrentContext(prev_ctx);
+
 	return oPresent(pSwapChain, SyncInterval, Flags);
 }
 

src/kiero/d3d9_impl.cpp

@@ -31,18 +31,22 @@ long __stdcall hkEndScene(LPDIRECT3DDEVICE9 pDevice)
 {
 	static bool init = false;
 
+	auto prev_ctx = ImGui::GetCurrentContext();
+
 	if (!init)
 	{
 		D3DDEVICE_CREATION_PARAMETERS params;
 		pDevice->GetCreationParameters(&params);
 
-		auto context = ImGui::CreateContext();
+		imgui_create(pDevice, nullptr);
+		ImGui::SetCurrentContext(state.imgui_ctx);
 		ImGui_ImplWin32_Init(params.hFocusWindow);
 		ImGui_ImplDX9_Init(pDevice);
-		imgui_create(context);
-
 		init = true;
 	}
+
+	ImGui::SetCurrentContext(state.imgui_ctx);
+
 	update_hud_info(sw_stats, params, vendorID);
 	ImGui_ImplDX9_NewFrame();
 	ImGui_ImplWin32_NewFrame();
@@ -53,6 +57,8 @@ long __stdcall hkEndScene(LPDIRECT3DDEVICE9 pDevice)
 	ImGui::Render();
 	ImGui_ImplDX9_RenderDrawData(ImGui::GetDrawData());
 
+	ImGui::SetCurrentContext(prev_ctx);
+
 	return oEndScene(pDevice);
 }
 

src/kiero/dx_shared.cpp

@@ -1,4 +1,5 @@
 #include "dx_shared.h"
+#include <dxgi.h>
 
 bool cfg_inited = false;
 ImVec2 window_size;
@@ -19,20 +20,34 @@ void imgui_init()
     init_cpu_stats(params);
 }
 
-void imgui_create(void *ctx)
+void imgui_create(void *ctx, void *device)
 {
     if (inited)
         return;
     inited = true;
 
     imgui_init();
-    deviceName = "something";
-    if (deviceName.find("Radeon") != std::string::npos
-    || deviceName.find("AMD") != std::string::npos){
-        vendorID = 0x1002;
-    } else {
-        vendorID = 0x10de;
+
+    // DX10+
+    if (device) {
+        IUnknown* pUnknown = reinterpret_cast<IUnknown*>(device);
+        IDXGIDevice* pDXGIDevice;
+        HRESULT hr = pUnknown->QueryInterface(__uuidof(IDXGIDevice), (void**)&pDXGIDevice);
+        if (S_OK == hr) {
+            IDXGIAdapter* pDXGIAdapter;
+            pDXGIDevice->GetAdapter(&pDXGIAdapter);
+            DXGI_ADAPTER_DESC adapterDesc;
+            hr = pDXGIAdapter->GetDesc(&adapterDesc);
+
+            if (S_OK == hr) {
+                vendorID = adapterDesc.VendorId;
+                char buf[256]{};
+                wcstombs_s(nullptr, buf, adapterDesc.Description, sizeof(adapterDesc.Description));
+                deviceName = buf;
+            }
+        }
     }
+
     init_gpu_stats(vendorID, params);
     // Setup Dear ImGui context
     IMGUI_CHECKVERSION();

src/kiero/dx_shared.h

@@ -19,5 +19,5 @@ extern uint32_t vendorID;
 extern std::string deviceName;
 extern bool inited;
 
-void imgui_create(void *ctx);
+void imgui_create(void *ctx, void *device);
 void imgui_init(void);