Direct3D 9学习笔记(1)初始化

参考书籍：DIRECTX9.03D游戏开发编程基础

一.创建IDirect3D9接口

//-----------------------------------------------------------------------------
// Global variables
//-----------------------------------------------------------------------------
LPDIRECT3D9         g_pD3D = NULL; // Used to create the D3DDevice
LPDIRECT3DDEVICE9   g_pd3dDevice = NULL; // Our rendering device

//-----------------------------------------------------------------------------
// Name: InitD3D()
// Desc: Initializes Direct3D
//-----------------------------------------------------------------------------
HRESULT InitD3D( HWND hWnd )
{
    // Create the D3D object, which is needed to create the D3DDevice.
    if( NULL == ( g_pD3D = Direct3DCreate9( D3D_SDK_VERSION ) ) )
        return E_FAIL;
    
    // Set up the structure used to create the D3DDevice. Most parameters are
    // zeroed out. We set Windowed to TRUE, since we want to do D3D in a
    // window, and then set the SwapEffect to "discard", which is the most
    // efficient method of presenting the back buffer to the display.  And 
    // we request a back buffer format that matches the current desktop display 
    // format.
    D3DPRESENT_PARAMETERS d3dpp;
    ZeroMemory( &d3dpp, sizeof( d3dpp ) );
    d3dpp.Windowed = TRUE;
    d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
    d3dpp.BackBufferFormat = D3DFMT_UNKNOWN;

    // Create the Direct3D device. Here we are using the default adapter (most
    // systems only have one, unless they have multiple graphics hardware cards
    // installed) and requesting the HAL (which is saying we want the hardware
    // device rather than a software one). Software vertex processing is 
    // specified since we know it will work on all cards. On cards that support 
    // hardware vertex processing, though, we would see a big performance gain 
    // by specifying hardware vertex processing.
    if( FAILED( g_pD3D->CreateDevice( D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd,
                                      D3DCREATE_SOFTWARE_VERTEXPROCESSING,
                                      &d3dpp, &g_pd3dDevice ) ) )
    {
        return E_FAIL;
    }

    // Device state would normally be set here

    return S_OK;
}

参考:http://msdn.microsoft.com/en-us/library/bb174300%28VS.85%29.aspx

二.创建IDirect3DDevice9

http://msdn.microsoft.com/en-us/library/bb174313(v=vs.85).aspx

HRESULT CreateDevice(
    [in]           UINT Adapter,
    [in]           D3DDEVTYPE DeviceType,
    [in]           HWND hFocusWindow,
    [in]           DWORD BehaviorFlags,
    [in, out]      D3DPRESENT_PARAMETERS *pPresentationParameters,
    [out, retval]  IDirect3DDevice9 **ppReturnedDeviceInterface
    );

关于D3DPRESENT_PARAMETERS:Describes the presentation parameters.

http://msdn.microsoft.com/en-us/library/bb172588(v=vs.85).aspx

/* Resize Optional Parameters */
typedef struct _D3DPRESENT_PARAMETERS_
{
    UINT                BackBufferWidth;
    UINT                BackBufferHeight;
    D3DFORMAT           BackBufferFormat;
    UINT                BackBufferCount;

    D3DMULTISAMPLE_TYPE MultiSampleType;
    DWORD               MultiSampleQuality;

    D3DSWAPEFFECT       SwapEffect;
    HWND                hDeviceWindow;
    BOOL                Windowed;
    BOOL                EnableAutoDepthStencil;
    D3DFORMAT           AutoDepthStencilFormat;
    DWORD               Flags;

    /* FullScreen_RefreshRateInHz must be zero for Windowed mode */
    UINT                FullScreen_RefreshRateInHz;
    UINT                PresentationInterval;
} D3DPRESENT_PARAMETERS;

三.检测显卡功能

D3DCAPS9 caps={};
g_pD3D->GetDeviceCaps(D3DADAPTER_DEFAULT,D3DDEVTYPE_HAL,&caps);
if(caps.Caps & D3DDEVCAPS_HWTRANSFORMANDLIGHT)
{
}