D3D初始化

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#include <d3d9.h>#pragma warning( disable : 4996 ) // disable deprecated warning #include <strsafe.h>#pragma warning( default : 4996 )bool InitD3D(HWND hWnd, bool fullscreen);void RenderScene();void ShutDown();LPDIRECT3D9 g_D3D = NULL;LPDIRECT3DDEVICE9 g_D3DDevice = NULL;LRESULT WINAPI MsgProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam){    switch (msg)    {    case WM_DESTROY:        PostQuitMessage(0);        return 0;        break;    case WM_KEYUP:        if (wParam == VK_ESCAPE)            PostQuitMessage(0);        break;    default:        break;    }    return DefWindowProc(hWnd, msg, wParam, lParam);}int WINAPI WinMain(HINSTANCE hInst, HINSTANCE prevInst, LPSTR cmdLine, int show){    WNDCLASSEX wc = { sizeof(WNDCLASSEX), CS_CLASSDC, MsgProc, 0, 0, hInst, NULL, NULL, NULL, NULL, L"UGPDX", NULL };    RegisterClassEx(&wc);    HWND hWnd = CreateWindow(L"UGPDX", L"Blank D3D Window", WS_OVERLAPPEDWINDOW, 100, 100, 640, 480, GetDesktopWindow(), NULL, wc.hInstance, NULL);    if (InitD3D(hWnd, false))    {        ShowWindow(hWnd, SW_SHOWDEFAULT);        UpdateWindow(hWnd);        MSG msg;        ZeroMemory(&msg, sizeof(msg));        while (msg.message!= WM_QUIT)        {            if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE))            {                TranslateMessage(&msg);                DispatchMessage(&msg);            }            else            {                RenderScene();            }        }    }    ShutDown();    UnregisterClass(L"UGPDX", wc.hInstance);    return 0;}bool InitD3D(HWND hWnd, bool fullscreen){    D3DDISPLAYMODE displayMode;    g_D3D = Direct3DCreate9(D3D9b_SDK_VERSION);    if (g_D3D == NULL)        return false;    if (FAILED(g_D3D->GetAdapterDisplayMode(D3DADAPTER_DEFAULT, &displayMode)))        return false;    D3DPRESENT_PARAMETERS d3dpp;    ZeroMemory(&d3dpp, sizeof(d3dpp));    if (fullscreen)    {        d3dpp.Windowed = FALSE;        d3dpp.BackBufferWidth = 640;        d3dpp.BackBufferHeight = 480;    }    else        d3dpp.Windowed = TRUE;    d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;    d3dpp.BackBufferFormat = displayMode.Format;    if (FAILED(g_D3D->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd, D3DCREATE_SOFTWARE_VERTEXPROCESSING, &d3dpp, &g_D3DDevice)))        return false;    return true;}void RenderScene(){    g_D3DDevice->Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0, 0, 0), 1.0f, 0);    g_D3DDevice->BeginScene();    g_D3DDevice->EndScene();    g_D3DDevice->Present(NULL, NULL, NULL, NULL);}void ShutDown(){    if (g_D3DDevice != NULL)        g_D3DDevice->Release();    if (g_D3D != NULL)        g_D3D->Release();    g_D3D = NULL;    g_D3DDevice = NULL;}
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