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2019年4月25日木曜日

【C++】 DirectX11の初期化（クラス化）

【C++】 DirectX11の初期化（クラス化）
(2019年4月25日)


■使用ソフト
・Visual Studio Community 2019


■言語
・C/C++


■Windows SDK バージョン
・10.0.17763.0
　※Windows SDK バージョンの変更方法


■手順
１．基本的には以下の流れ参照
【C++】 メッセージボックスの作成　//プロジェクトの作成からビルドまでの操作方法について

２．以下の4つのファイルを作成してビルドを行う。
（１）Main.h
（２）Main.cpp
（３）DirectX.h
（４）DirectX.cpp

（１）Main.h
#pragma once

 #include <windows.h>

 class Window
{
public:
    HRESULT InitWindow(HINSTANCE hInstance, int nCmdShow);
    static HWND GethWnd();
private:
    static HWND g_hWnd;
};

（２）Main.cpp
#include "Main.h"
#include "DirectX.h"

 HWND Window::g_hWnd = nullptr;

 //--------------------------------------------------------------------------------------
// 前方宣言
//--------------------------------------------------------------------------------------
LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

 int WINAPI wWinMain(_In_ HINSTANCE hInstance, _In_opt_ HINSTANCE hPrevInstance, _In_ LPWSTR lpCmdLine, _In_ int nCmdShow)
{
    Window win;

     if (FAILED(win.InitWindow(hInstance, nCmdShow)))
        return 0;

     DirectX11 dx;

     if (FAILED(dx.InitDevice()))
        return 0;

     // メインメッセージループ
    MSG msg = { 0 };
    while (WM_QUIT != msg.message)
    {
        if (PeekMessage(&msg, nullptr, 0, 0, PM_REMOVE))
        {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
        else
        {
            dx.Render();
        }
    }

     return (int)msg.wParam;
}

 LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    PAINTSTRUCT ps;
    HDC hdc;

     switch (message)
    {
    case WM_PAINT:
        hdc = BeginPaint(hWnd, &ps);
        EndPaint(hWnd, &ps);
        break;

     case WM_DESTROY:
        PostQuitMessage(0);
        break;

     default:
        return DefWindowProc(hWnd, message, wParam, lParam);
    }

     return 0;
}

 HRESULT Window::InitWindow(HINSTANCE hInstance, int nCmdShow)
{
    WNDCLASSEX wcex;
    wcex.cbSize = sizeof(WNDCLASSEX);
    wcex.style = CS_HREDRAW | CS_VREDRAW;
    wcex.lpfnWndProc = WndProc;
    wcex.cbClsExtra = 0;
    wcex.cbWndExtra = 0;
    wcex.hInstance = hInstance;
    wcex.hIcon = nullptr;
    wcex.hCursor = LoadCursor(nullptr, IDC_ARROW);
    wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
    wcex.lpszMenuName = nullptr;
    wcex.lpszClassName = L"WindowClass";
    wcex.hIconSm = nullptr;
    if (!RegisterClassEx(&wcex))
        return E_FAIL;

     RECT rc = { 0, 0, 800, 600 };
    AdjustWindowRect(&rc, WS_OVERLAPPEDWINDOW, FALSE);
    g_hWnd = CreateWindow(L"WindowClass", L"DirectX11の初期化（クラス化）",
        WS_OVERLAPPED | WS_CAPTION | WS_SYSMENU | WS_MINIMIZEBOX,
        CW_USEDEFAULT, CW_USEDEFAULT, rc.right - rc.left, rc.bottom - rc.top, nullptr, nullptr, hInstance,
        nullptr);
    if (!g_hWnd)
        return E_FAIL;

     ShowWindow(g_hWnd, nCmdShow);

     return S_OK;
}

 HWND Window::GethWnd()
{
    return g_hWnd;
}

（３）DirectX.h
#pragma once

 #pragma comment(lib,"d3d11.lib")
#include <d3d11_1.h>
#include <directxcolors.h>

 class DirectX11
{
public:
    DirectX11();
    ~DirectX11();
    HRESULT InitDevice();
    void Render();
private:
    ID3D11Device* pd3dDevice;
    ID3D11Device1* pd3dDevice1;
    ID3D11DeviceContext* pImmediateContext;
    ID3D11DeviceContext1* pImmediateContext1;
    IDXGISwapChain* pSwapChain;
    IDXGISwapChain1* pSwapChain1;
    ID3D11RenderTargetView* pRenderTargetView;
};

（４）DirectX.cpp
#include "Main.h"
#include "DirectX.h"

 DirectX11::DirectX11()
{
    pd3dDevice = nullptr;
    pd3dDevice1 = nullptr;
    pImmediateContext = nullptr;
    pImmediateContext1 = nullptr;
    pSwapChain = nullptr;
    pSwapChain1 = nullptr;
    pRenderTargetView = nullptr;
}

 DirectX11::~DirectX11()
{
    if (pImmediateContext) pImmediateContext->ClearState();

     if (pRenderTargetView) pRenderTargetView->Release();
    if (pSwapChain1) pSwapChain1->Release();
    if (pSwapChain) pSwapChain->Release();
    if (pImmediateContext1) pImmediateContext1->Release();
    if (pImmediateContext) pImmediateContext->Release();
    if (pd3dDevice1) pd3dDevice1->Release();
    if (pd3dDevice) pd3dDevice->Release();
}

 HRESULT DirectX11::InitDevice()
{
    HRESULT hr = S_OK;

     RECT rc;
    GetClientRect(Window::GethWnd(), &rc);
    UINT width = rc.right - rc.left;
    UINT height = rc.bottom - rc.top;

     UINT createDeviceFlags = 0;
#ifdef _DEBUG
    createDeviceFlags |= D3D11_CREATE_DEVICE_DEBUG;
#endif

     D3D_DRIVER_TYPE driverTypes[] =
    {
        D3D_DRIVER_TYPE_HARDWARE,
        D3D_DRIVER_TYPE_WARP,
        D3D_DRIVER_TYPE_REFERENCE,
    };
    UINT numDriverTypes = ARRAYSIZE(driverTypes);

     D3D_FEATURE_LEVEL featureLevels[] =
    {
        D3D_FEATURE_LEVEL_11_1,
        D3D_FEATURE_LEVEL_11_0,
        D3D_FEATURE_LEVEL_10_1,
        D3D_FEATURE_LEVEL_10_0,
    };
    UINT numFeatureLevels = ARRAYSIZE(featureLevels);

     D3D_DRIVER_TYPE g_driverType = D3D_DRIVER_TYPE_NULL;
    D3D_FEATURE_LEVEL g_featureLevel = D3D_FEATURE_LEVEL_11_0;
    for (UINT driverTypeIndex = 0; driverTypeIndex < numDriverTypes; driverTypeIndex++)
    {
        g_driverType = driverTypes[driverTypeIndex];
        hr = D3D11CreateDevice(nullptr, g_driverType, nullptr, createDeviceFlags, featureLevels, numFeatureLevels,
            D3D11_SDK_VERSION, &pd3dDevice, &g_featureLevel, &pImmediateContext);

         if (hr == E_INVALIDARG)
        {
            hr = D3D11CreateDevice(nullptr, g_driverType, nullptr, createDeviceFlags, &featureLevels[1], numFeatureLevels - 1,
                D3D11_SDK_VERSION, &pd3dDevice, &g_featureLevel, &pImmediateContext);
        }

         if (SUCCEEDED(hr))
            break;
    }
    if (FAILED(hr))
        return hr;

     IDXGIFactory1* dxgiFactory = nullptr;
    {
        IDXGIDevice* dxgiDevice = nullptr;
        hr = pd3dDevice->QueryInterface(__uuidof(IDXGIDevice), reinterpret_cast<void**>(&dxgiDevice));
        if (SUCCEEDED(hr))
        {
            IDXGIAdapter* adapter = nullptr;
            hr = dxgiDevice->GetAdapter(&adapter);
            if (SUCCEEDED(hr))
            {
                hr = adapter->GetParent(__uuidof(IDXGIFactory1), reinterpret_cast<void**>(&dxgiFactory));
                adapter->Release();
            }
            dxgiDevice->Release();
        }
    }
    if (FAILED(hr))
        return hr;

     IDXGIFactory2* dxgiFactory2 = nullptr;
    hr = dxgiFactory->QueryInterface(__uuidof(IDXGIFactory2), reinterpret_cast<void**>(&dxgiFactory2));
    if (dxgiFactory2)
    {
        hr = pd3dDevice->QueryInterface(__uuidof(ID3D11Device1), reinterpret_cast<void**>(&pd3dDevice1));
        if (SUCCEEDED(hr))
        {
            (void)pImmediateContext->QueryInterface(__uuidof(ID3D11DeviceContext1), reinterpret_cast<void**>(&pImmediateContext1));
        }

         DXGI_SWAP_CHAIN_DESC1 sd = {};
        sd.Width = width;
        sd.Height = height;
        sd.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
        sd.SampleDesc.Count = 1;
        sd.SampleDesc.Quality = 0;
        sd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
        sd.BufferCount = 1;

         hr = dxgiFactory2->CreateSwapChainForHwnd(pd3dDevice, Window::GethWnd(), &sd, nullptr, nullptr, &pSwapChain1);
        if (SUCCEEDED(hr))
        {
            hr = pSwapChain1->QueryInterface(__uuidof(IDXGISwapChain), reinterpret_cast<void**>(&pSwapChain));
        }

         dxgiFactory2->Release();
    }
    else
    {
        DXGI_SWAP_CHAIN_DESC sd = {};
        sd.BufferCount = 1;
        sd.BufferDesc.Width = width;
        sd.BufferDesc.Height = height;
        sd.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
        sd.BufferDesc.RefreshRate.Numerator = 60;
        sd.BufferDesc.RefreshRate.Denominator = 1;
        sd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
        sd.OutputWindow = Window::GethWnd();
        sd.SampleDesc.Count = 1;
        sd.SampleDesc.Quality = 0;
        sd.Windowed = TRUE;

         hr = dxgiFactory->CreateSwapChain(pd3dDevice, &sd, &pSwapChain);
    }

     dxgiFactory->MakeWindowAssociation(Window::GethWnd(), DXGI_MWA_NO_ALT_ENTER);

     dxgiFactory->Release();

     if (FAILED(hr))
        return hr;

     ID3D11Texture2D* pBackBuffer = nullptr;
    hr = pSwapChain->GetBuffer(0, __uuidof(ID3D11Texture2D), reinterpret_cast<void**>(&pBackBuffer));
    if (FAILED(hr))
        return hr;

     hr = pd3dDevice->CreateRenderTargetView(pBackBuffer, nullptr, &pRenderTargetView);
    pBackBuffer->Release();
    if (FAILED(hr))
        return hr;

     pImmediateContext->OMSetRenderTargets(1, &pRenderTargetView, nullptr);

     D3D11_VIEWPORT vp;
    vp.Width = (FLOAT)width;
    vp.Height = (FLOAT)height;
    vp.MinDepth = 0.0f;
    vp.MaxDepth = 1.0f;
    vp.TopLeftX = 0;
    vp.TopLeftY = 0;
    pImmediateContext->RSSetViewports(1, &vp);

     return S_OK;
}

 void DirectX11::Render()
{
    pImmediateContext->ClearRenderTargetView(pRenderTargetView, DirectX::Colors::Aquamarine);
    pSwapChain->Present(0, 0);
}

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