Win32 nvapi gpu usage

src/meson.build

@@ -41,6 +41,7 @@ if ['windows', 'mingw'].contains(host_machine.system())
   vklayer_files += files(
     'file_utils_win32.cpp',
     'cpu_win32.cpp',
+    'win/dxgi.cpp',
     'win/main.cpp',
     'win/kiero.cpp',
     'win/d3d12_hook.cpp',

src/win/d3d_shared.cpp

@@ -7,6 +7,7 @@ struct swapchain_stats sw_stats {};
 uint32_t vendorID;
 
 void init_d3d_shared(){
+    vendorID = get_device_id_dxgi();
     if (cfg_inited)
         return;
      parse_overlay_config(&params, getenv("MANGOHUD_CONFIG"));

src/win/d3d_shared.h

@@ -6,4 +6,5 @@ extern struct overlay_params params;
 extern struct swapchain_stats sw_stats;
 extern uint32_t vendorID;
 
-extern void init_d3d_shared(void);
+extern void init_d3d_shared(void);
+extern uint32_t get_device_id_dxgi(void);

src/win/dxgi.cpp

@@ -0,0 +1,46 @@
+#include "kiero.h"
+#include "windows.h"
+#include <dxgi.h>
+#include "kiero.h"
+#include <cstdio>
+
+#ifdef _UNICODE
+# define KIERO_TEXT(text) L##text
+#else
+# define KIERO_TEXT(text) text
+#endif
+
+uint32_t get_device_id_dxgi(){
+    printf("start get device id\n");
+    HMODULE libDXGI;
+    if ((libDXGI = ::GetModuleHandle(KIERO_TEXT("dxgi.dll"))) == NULL){
+        printf("dxgi not found\n");
+        return 0;
+    }
+    auto CreateDXGIFactory = reinterpret_cast<decltype(&::CreateDXGIFactory)>(::GetProcAddress(libDXGI, "CreateDXGIFactory"));
+    if (!CreateDXGIFactory)
+    {   
+        printf("can't create dxgi factory\n");
+        return 0;
+    }
+    IDXGIAdapter* dxgi_adapter;
+    IDXGIFactory* dxgi_factory;
+    if (((long(__stdcall*)(const IID&, void**))(CreateDXGIFactory))(__uuidof(IDXGIFactory), (void**)&dxgi_factory) < 0)
+    {
+        printf("can't assign factory\n");
+        return 0;
+    }
+    DXGI_ADAPTER_DESC AdapterDesc;
+    int i;
+    for (i = 0; SUCCEEDED(dxgi_factory->EnumAdapters(i, &dxgi_adapter)); i++) {
+        dxgi_adapter->GetDesc(&AdapterDesc);
+        printf("%ls\n", AdapterDesc.Description);
+        if (AdapterDesc.VendorId == 0x10de)
+            return AdapterDesc.VendorId;
+        if (AdapterDesc.VendorId == 0x1002)
+            return AdapterDesc.VendorId;
+        if (AdapterDesc.VendorId == 0x8086)
+            return AdapterDesc.VendorId;
+    }
+    return 0;
+}