DirectX 初始化DirectX(手写和红龙书里面的方式)

#include "CreateDevice.h"
#include <d3d9.h>

#pragma region 初始化函数
CreateDevice::CreateDevice()
{
}


CreateDevice::~CreateDevice()
{
}


#pragma endregion

LPDIRECT3D9 g_pD3D;
LPDIRECT3DDEVICE9    g_pd3dDevice;

HRESULT InitD3D(HWND hWnd)
{
    if (NULL == (g_pD3D = Direct3DCreate9(D3D_SDK_VERSION)))
        return E_FAIL;

    D3DPRESENT_PARAMETERS d3dpp;
    ZeroMemory(&d3dpp, sizeof(d3dpp));
    d3dpp.Windowed = TRUE;//不是全屏
    d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
    d3dpp.BackBufferFormat = D3DFMT_UNKNOWN;

    if (FAILED(g_pD3D->CreateDevice(D3DADAPTER_DEFAULT,
        D3DDEVTYPE_HAL, hWnd, D3DCREATE_SOFTWARE_VERTEXPROCESSING,
        &d3dpp, &g_pd3dDevice)))
    {
        return E_FAIL;
    }
    return S_OK;
}

//渲染s
VOID Render()
{
    if (NULL == g_pd3dDevice)
        return;

    g_pd3dDevice->Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(255, 255, 0), 1.0f, 0);

    if (SUCCEEDED(g_pd3dDevice->BeginScene()))
    {
        //渲染

        g_pd3dDevice->EndScene();
    }
    g_pd3dDevice->Present(NULL, NULL, NULL, NULL);
}

//释放
VOID Cleanup()
{
    if (g_pd3dDevice != NULL)
    {
        g_pd3dDevice->Release();
    }

    if (g_pD3D != NULL)
    {
        g_pD3D->Release();
    }
}

LRESULT WINAPI MsgProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    switch (msg)
    {
    case WM_DESTROY:
        Cleanup();
        PostQuitMessage(0);
        return 0;
    case WM_PAINT:
        Render();
        ValidateRect(hWnd, NULL);
        return 0;
    }
    return DefWindowProc(hWnd, msg, wParam, lParam);
}

INT WINAPI WinMain(HINSTANCE hInst, HINSTANCE, LPSTR, INT)
{
    //1.注册窗口类
    WNDCLASSEX wc = { sizeof(WNDCLASSEX), CS_CLASSDC,
        MsgProc, 0L, 0L, GetModuleHandle(NULL), NULL, NULL,
        NULL, NULL, "D3D Tutorial", NULL };
    RegisterClassEx(&wc);

    //2.用注册的窗口类创建窗口
    HWND hWnd = CreateWindow("D3D Tutorial", "D3D Tutorial",
        WS_OVERLAPPEDWINDOW, 100, 100, 300, 300, NULL, NULL, wc.hInstance, NULL);

    //3. 初始化D3D
    if (SUCCEEDED(InitD3D(hWnd)))
    {
        //显示和刷新窗口
        ShowWindow(hWnd, SW_SHOWDEFAULT);

        UpdateWindow(hWnd);

        MSG msg;

        //消息循环
        while (GetMessage(&msg, NULL, 0, 0))
        {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }

        UnregisterClass("D3D Tutorial", wc.hInstance);
        return 0;
    }

}