Nanashi-soft○プログラマ専用○DirectX11開発○

◇DirectX11プログラミング -DirectX11を初期化する-

#include <windows.h>
#include <tchar.h>
#include <d3d11.h>

#pragma once
#pragma comment(lib, "d3d11.lib")

#define SAFE_RELEASE(p) { if(p) { (p)->Release(); (p)=NULL; } }

//ウィンドウをクリエイトの直後から
	//デバイスの生成
	HRESULT hr;
	ID3D11Device* hpDevice = NULL;
	ID3D11DeviceContext* hpDeviceContext = NULL;
	hr = D3D11CreateDevice(
				NULL,
				D3D_DRIVER_TYPE_HARDWARE,
				NULL,
				0,
				NULL,
				0,
				D3D11_SDK_VERSION,
				&hpDevice,
				NULL,
				&hpDeviceContext);
	if FAILED( hr )
	{
		MessageBox(hWnd, _T("D3D11CreateDevice"), _T("Err"), MB_ICONSTOP);
		goto End;
	}

	//インターフェース取得
	IDXGIDevice1* hpDXGI = NULL;
	if(FAILED(hpDevice->QueryInterface(__uuidof(IDXGIDevice1), (void**)&hpDXGI))){
		MessageBox(hWnd, _T("QueryInterface"), _T("Err"), MB_ICONSTOP);
		goto End;
	}

	//アダプター取得
	IDXGIAdapter* hpAdapter = NULL;
	if(FAILED(hpDXGI->GetAdapter(&hpAdapter))){
		MessageBox(hWnd, _T("GetAdapter"), _T("Err"), MB_ICONSTOP);
		goto End;
	}

	//ファクトリー取得
	IDXGIFactory* hpDXGIFactory = NULL;
	hpAdapter->GetParent(__uuidof(IDXGIFactory), (void**)&hpDXGIFactory);
	if(hpDXGIFactory == NULL){
		MessageBox(hWnd, _T("GetParent"), _T("Err"), MB_ICONSTOP);
		goto End;
	}

	//ALT+Enterでフルスクリーンを許可する
	if(FAILED(hpDXGIFactory->MakeWindowAssociation(hWnd, 0))){
		MessageBox(hWnd, _T("MakeWindowAssociation"), _T("Err"), MB_ICONSTOP);
		goto End;
	}

	//スワップチェイン作成
	IDXGISwapChain* hpDXGISwpChain = NULL;
	DXGI_SWAP_CHAIN_DESC hDXGISwapChainDesc;
	hDXGISwapChainDesc.BufferDesc.Width = 1980;
	hDXGISwapChainDesc.BufferDesc.Height = 1080;
	hDXGISwapChainDesc.BufferDesc.RefreshRate.Numerator  = 0;
	hDXGISwapChainDesc.BufferDesc.RefreshRate.Denominator = 1;
	hDXGISwapChainDesc.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM_SRGB;
	hDXGISwapChainDesc.BufferDesc.ScanlineOrdering = DXGI_MODE_SCANLINE_ORDER_UNSPECIFIED;
	hDXGISwapChainDesc.BufferDesc.Scaling = DXGI_MODE_SCALING_UNSPECIFIED;
	hDXGISwapChainDesc.SampleDesc.Count = 1;
	hDXGISwapChainDesc.SampleDesc.Quality = 0;
	hDXGISwapChainDesc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
	hDXGISwapChainDesc.BufferCount = 1;
	hDXGISwapChainDesc.OutputWindow = hWnd;
	hDXGISwapChainDesc.Windowed = TRUE;
	hDXGISwapChainDesc.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;
	hDXGISwapChainDesc.Flags = DXGI_SWAP_CHAIN_FLAG_ALLOW_MODE_SWITCH;
	if(FAILED(hpDXGIFactory->CreateSwapChain(hpDevice, &hDXGISwapChainDesc, &hpDXGISwpChain))){
		MessageBox(hWnd, _T("CreateSwapChain"), _T("Err"), MB_ICONSTOP);
		goto End;
	}

	//そのスワップチェインのバックバッファ取得
	ID3D11Texture2D* hpBackBuffer = NULL;
	if(FAILED(hpDXGISwpChain->GetBuffer(0, __uuidof(ID3D11Texture2D), (void**)&hpBackBuffer))){
		MessageBox(hWnd, _T("SwpChain GetBuffer"), _T("Err"), MB_ICONSTOP);
		goto End;
	}

	//そのバックバッファから描画ターゲット生成
	ID3D11RenderTargetView *hpRenderTargetView = NULL;
	if(FAILED(hpDevice->CreateRenderTargetView(hpBackBuffer, NULL, &hpRenderTargetView))){
		MessageBox(hWnd, _T("CreateRenderTargetView"), _T("Err"), MB_ICONSTOP);
		goto End;
	}

	//更にその描画ターゲットをコンテキストに設定
	hpDeviceContext->OMSetRenderTargets(1, &hpRenderTargetView, NULL);

	//ビューポート設定
	D3D11_VIEWPORT vp;
	vp.TopLeftX = 0;
	vp.TopLeftY = 0;
	vp.Width = 1920;
	vp.Height = 1080;
	vp.MinDepth = 0.0f;
	vp.MaxDepth = 1.0f;
	hpDeviceContext->RSSetViewports(1, &vp);

	//メインループ
	MSG hMsg;
	while(true){
		while(PeekMessageW(&hMsg, NULL, 0, 0, PM_REMOVE)){
			if(hMsg.message == WM_QUIT){
				goto End;
			}
			TranslateMessage(&hMsg);
			DispatchMessage(&hMsg);
		}

		float ClearColor[] = {0.0f, 0.0f, 1.0f, 1.0f};
		hpDeviceContext->ClearRenderTargetView(hpRenderTargetView, ClearColor);
		hpDXGISwpChain->Present(0, 0);
	}

End:
	//ポインタで生成したものはリリースする必要がある
	//どの変数か識別し易いように，hpで始めてある
	SAFE_RELEASE(hpRenderTargetView);
	SAFE_RELEASE(hpBackBuffer);
	SAFE_RELEASE(hpDXGISwpChain);
	SAFE_RELEASE(hpDXGIFactory);
	SAFE_RELEASE(hpAdapter);
	SAFE_RELEASE(hpDXGI);
	SAFE_RELEASE(hpDeviceContext);
	SAFE_RELEASE(hpDevice);

	return 0;
}