Document/View框架中初始化Direct3D

一般情况下，初始化Direct3D包含以下四个步骤：

1、获得IDirect3D9接口指针；

2、检查显卡是否支持硬件顶点处理；

3、定义一个D3DPRESENT _PARAMETERS变量，指定相关的显示特性；

4、创建IDirect3DDevice9对象，该对象指向一个代表图形设备的C++对象。

具体在文档/视图框架中初始化过程如下：

1、在View类中添加两个成员变量（m_pD3d应该不是必须的）：

class CXXView : public CView

{

private:

LPDIRECT3D9 m_pD3d;

LPDIRECT3DDEVICE9 m_pD3dDevice;

protected: // create from serialization only

CFirstView();

DECLARE_DYNCREATE(CFirstView)

// Attributes

public:

CFirstDoc* GetDocument() const;

...

};

2、进行初始化工作。可以首先将初始化的工作封装为一个View类的成员函数：

bool CXXView::D3dInit()

{

HWND hwnd = GetSafeHwnd();

CRect clientrect;

GetClientRect(&clientrect);

m_pD3d = Direct3DCreate9(D3D_SDK_VERSION);

if(m_pD3d == NULL)

{

MessageBox("Fail to create D3d interface");

return false;

}

D3DCAPS9 caps;

m_pD3d->GetDeviceCaps(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, &caps);

int vp = 0;

if(caps.DevCaps & D3DDEVCAPS_HWTRANSFORMANDLIGHT)

vp = D3DCREATE_HARDWARE_VERTEXPROCESSING;

else

vp = D3DCREATE_SOFTWARE_VERTEXPROCESSING;

D3DPRESENT_PARAMETERS para;

ZeroMemory(&para,sizeof(para));

para.BackBufferWidth = clientrect.Width();

para.BackBufferHeight = clientrect.Height();

para.BackBufferFormat = D3DFMT_A8R8G8B8; //像素格式

para.BackBufferCount = 1;

para.MultiSampleType = D3DMULTISAMPLE_NONE;

para.MultiSampleQuality = 0;

para.SwapEffect = D3DSWAPEFFECT_DISCARD;

para.hDeviceWindow = hwnd;

para.Windowed = TRUE;

para.EnableAutoDepthStencil = true;

para.AutoDepthStencilFormat = D3DFMT_D24S8; // depth format

para.Flags = 0;

para.FullScreen_RefreshRateInHz = D3DPRESENT_RATE_DEFAULT;

para.PresentationInterval = D3DPRESENT_INTERVAL_IMMEDIATE;

HRESULT hr = m_pD3d->CreateDevice(D3DADAPTER_DEFAULT,

D3DDEVTYPE_HAL,

hwnd,

vp,

&para,

&m_pD3dDevice);

if(FAILED(hr))

{

//         DWORD dw = GetLastError();

//         CString error;

//         error.Format("%u,%u",dw,hr);

//         MessageBox(error);

MessageBox("Fail to create D3d device");

return false;

}

return true;

}

3、重载OnInitialUpdate虚函数，在其中调用D3dInit：

void CXXView::OnInitialUpdate()

{

CView::OnInitialUpdate();

// TODO: Add your specialized code here and/or call the base class

if(!D3dInit())

MessageBox("D3d initialization failed!");

}

4、在析构函数释放设备和D3d对象：

CXXView::~CXXView()

{

if(m_pD3dDevice != NULL)

m_pD3dDevice->Release();

if(m_pD3d != NULL)

m_pD3d->Release();

}

5、可以在OnPaint中测试一下：

void CXXView::OnPaint()

{

CPaintDC dc(this); // device context for painting

// TODO: Add your message handler code here

// Do not call CView::OnPaint() for painting messages

if(m_pD3dDevice)

{

m_pD3dDevice->Clear(0, 0, D3DCLEAR_TARGET | D3DCLEAR_ZBUFFER,0x00000000, 1.0f, 0);

m_pD3dDevice->Present(0,0,0,0);

}

}

原文链接: https://www.cnblogs.com/youthlion/archive/2012/04/27/2474137.html

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