C++ / DirectX 11로 직접 만들기

cmake_minimum_required(VERSION 3.16)
project(gfx_impl)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

add_executable(app WIN32 src/main.cpp)   # WIN32: 콘솔 없는 GUI 앱

# Windows SDK에 이미 포함된 라이브러리를 링크만 한다
target_link_libraries(app PRIVATE d3d11 dxgi d3dcompiler)

#pragma comment(lib, "d3d11.lib")
#pragma comment(lib, "dxgi.lib")
#pragma comment(lib, "d3dcompiler.lib")

#include <windows.h>
#include <d3d11.h>
#include <dxgi.h>
#include <wrl/client.h>
#pragma comment(lib, "d3d11.lib")
#pragma comment(lib, "dxgi.lib")

using Microsoft::WRL::ComPtr;

ComPtr<ID3D11Device>         g_device;
ComPtr<ID3D11DeviceContext>  g_context;
ComPtr<IDXGISwapChain>       g_swapChain;
ComPtr<ID3D11RenderTargetView> g_rtv;

// 윈도우 메시지 처리
LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp) {
    if (msg == WM_DESTROY) { PostQuitMessage(0); return 0; }
    return DefWindowProc(hwnd, msg, wp, lp);
}

int WINAPI WinMain(HINSTANCE hInst, HINSTANCE, LPSTR, int) {
    // 1) 윈도우 클래스 등록 + 창 생성
    WNDCLASS wc = {};
    wc.lpfnWndProc = WndProc;
    wc.hInstance = hInst;
    wc.lpszClassName = L"D3D11Window";
    RegisterClass(&wc);
    HWND hwnd = CreateWindow(wc.lpszClassName, L"DirectX 11",
        WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, 1280, 720,
        nullptr, nullptr, hInst, nullptr);
    ShowWindow(hwnd, SW_SHOW);

    // 2) 디바이스 + 스왑체인 생성 (한 번에)
    DXGI_SWAP_CHAIN_DESC scd = {};
    scd.BufferCount = 2;
    scd.BufferDesc.Width = 1280;
    scd.BufferDesc.Height = 720;
    scd.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
    scd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
    scd.OutputWindow = hwnd;
    scd.SampleDesc.Count = 1;              // MSAA 없음
    scd.Windowed = TRUE;
    scd.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;

    D3D11CreateDeviceAndSwapChain(
        nullptr, D3D_DRIVER_TYPE_HARDWARE, nullptr, 0,
        nullptr, 0, D3D11_SDK_VERSION,
        &scd, &g_swapChain, &g_device, nullptr, &g_context);

    // 3) 백버퍼를 렌더 타깃 뷰로 감싼다 (OpenGL의 기본 프레임버퍼에 해당)
    ComPtr<ID3D11Texture2D> backBuffer;
    g_swapChain->GetBuffer(0, IID_PPV_ARGS(&backBuffer));
    g_device->CreateRenderTargetView(backBuffer.Get(), nullptr, &g_rtv);

    // 4) 뷰포트 설정 (glViewport 대응)
    D3D11_VIEWPORT vp = { 0, 0, 1280, 720, 0.0f, 1.0f };
    g_context->RSSetViewports(1, &vp);

    // 5) 렌더 루프
    MSG msg = {};
    while (msg.message != WM_QUIT) {
        if (PeekMessage(&msg, nullptr, 0, 0, PM_REMOVE)) {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
            continue;
        }
        // 화면 지우기 (glClearColor + glClear 대응)
        float clear[4] = { 0.06f, 0.07f, 0.10f, 1.0f };
        g_context->OMSetRenderTargets(1, g_rtv.GetAddressOf(), nullptr);
        g_context->ClearRenderTargetView(g_rtv.Get(), clear);

        // ── 여기서 그린다 ──

        g_swapChain->Present(1, 0);   // V-Sync ON (glfwSwapBuffers 대응)
    }
    return 0;
}