Adapter.h

#pragma once

#include <D3D11.h>
#include <vector>
#include <dxgi1_6.h>

#pragma comment(lib, "D3D11.lib")
#pragma comment(lib, "D3DCompiler.lib")
#pragma comment(lib, "DXGI.lib")

extern "C" {
	_declspec(dllexport) DWORD NvOptimusEnablement = 0x00000001;
}

class Adapter {
public:
	IDXGIAdapter1* adapter;

	void findAdapter() {
		IDXGIAdapter1* adapterf;
		std::vector<IDXGIAdapter1*> adapters;
		IDXGIFactory6* factory = NULL;

		CreateDXGIFactory(__uuidof(IDXGIFactory6), (void**)&factory);
		int i = 0;

		while (factory->EnumAdapters1(i, &adapterf) != DXGI_ERROR_NOT_FOUND) {
			adapters.push_back(adapterf);
			i++;
		}

		long long maxVideoMemory = 0;
		int useAdapterIndex = 0;

		for (int i = 0; i < adapters.size(); i++) {
			DXGI_ADAPTER_DESC desc;
			adapters[i]->GetDesc(&desc);

			if (desc.DedicatedVideoMemory > maxVideoMemory) {
				maxVideoMemory = desc.DedicatedVideoMemory;
				useAdapterIndex = i;
			}
		}

		adapter = adapters[useAdapterIndex];
		factory->Release();
	}
};