测显卡支持哪些格式的YUV

最近在看dvd2dvi程序时，遇到问题
1.7600GS的显卡在YUV422格式下，显示为黑屏（调试下也如此）
2.7300LE的显卡在YUV422格式下，显示为灰屏（调试下可显示为彩色）

3.HD2600的显卡在YUV422格式下，显示正常

可能与显卡支持有关，写了一个显卡测试程序

#define   FOURCC_YV12 0x32315659   //   MAKEFOURCC('Y','V','1','2')  
#define   FOURCC_Y411 0x31313459   //   MAKEFOURCC('Y','4','1','1')  
#define   FOURCC_YUY2 0x32595559   //   MAKEFOURCC('Y','U','Y','2')  
#define   FOURCC_UYVY 0x59565955   //   MAKEFOURCC('U','Y','V','Y')
LPDIRECTDRAW m_lpDD = NULL;
LPDIRECTDRAW2 m_lpDD2 = NULL;
LPDIRECTDRAWSURFACE m_lpDDSPrimary = NULL;
LPDIRECTDRAWSURFACE m_lpDDSOverlay[6] = {0};

void YUYVFormatTest()
{
 HRESULT hr=0;

 //创建DirectDraw对象
 hr=DirectDrawCreate(NULL,&m_lpDD,NULL);
 if(hr==DD_OK){
  if(m_lpDD->QueryInterface(IID_IDirectDraw2, (LPVOID*)&m_lpDD2)==DD_OK)
  {
   hr=m_lpDD2->SetCooperativeLevel(GetActiveWindow(), DDSCL_NORMAL);
   if(hr==DD_OK){
    DDSURFACEDESC ddsd; //表面描述
    ddsd.dwSize=sizeof( ddsd );

    //创建主表面
    ddsd.dwFlags=DDSD_CAPS;
    ddsd.ddsCaps.dwCaps=DDSCAPS_PRIMARYSURFACE ;
    ddsd.dwBackBufferCount = 1;
    hr=m_lpDD2->CreateSurface(&ddsd,&m_lpDDSPrimary,NULL);
    if(hr==DD_OK){
     // Get driver capabilities
     DDCAPS   capsDrv;
     memset(&capsDrv,0,sizeof(capsDrv));
     capsDrv.dwSize=sizeof(DDCAPS);
     hr=m_lpDD2->GetCaps(&capsDrv, NULL);
     if(hr==DD_OK && (capsDrv.dwCaps & DDCAPS_OVERLAY)){ // determine Overlay support.
      DDPIXELFORMAT PixelFormat[] = {
       { sizeof(DDPIXELFORMAT), DDPF_FOURCC, FOURCC_UYVY, 0, 0, 0, 0, 0 }, // UYVY
       { sizeof(DDPIXELFORMAT), DDPF_FOURCC, FOURCC_Y411, 0, 0, 0, 0, 0 }, // Y411
       { sizeof(DDPIXELFORMAT), DDPF_FOURCC, FOURCC_YV12, 0, 0, 0, 0, 0 }, // YV12
       { sizeof(DDPIXELFORMAT), DDPF_FOURCC, FOURCC_YUY2, 0, 0, 0, 0, 0 }, // YUY2
      };
      int i, nPixelFormat=sizeof(PixelFormat)/sizeof(DDPIXELFORMAT);

      for(i=0;i       // 创建覆盖表面
       ZeroMemory(&ddsd, sizeof(DDSURFACEDESC));
       ddsd.dwSize = sizeof(DDSURFACEDESC);
       ddsd.dwFlags = DDSD_CAPS|DDSD_HEIGHT|DDSD_WIDTH|DDSD_PIXELFORMAT;
       ddsd.ddsCaps.dwCaps = DDSCAPS_OVERLAY | DDSCAPS_VIDEOMEMORY; // Overlay related APIs will fail without hardware support.  
       ddsd.dwWidth = 352;
       ddsd.dwHeight = 288;
       memcpy(&ddsd.ddpfPixelFormat,&PixelFormat[i],sizeof(DDPIXELFORMAT));
       ddsd.ddpfPixelFormat.dwYUVBitCount = 16;

       hr=m_lpDD2->CreateSurface(&ddsd, &m_lpDDSOverlay[i], NULL);
       if(hr==DD_OK){
        char tmpBuf[256];
        sprintf(tmpBuf,"创建第%d种OVERLAY表面成功 !", i);
        //MessageBox(hWndCopy, tmpBuf,"DirectDraw初始化", MB_ICONINFORMATION);
        m_lpDDSOverlay[i]->UpdateOverlay(NULL, m_lpDDSPrimary, NULL, DDOVER_HIDE, NULL);
        m_lpDDSOverlay[i]->Release();
        m_lpDDSOverlay[i]=NULL;
        //break;
       }
      }

      DDPIXELFORMAT ddPixelFormat;
      ddPixelFormat.dwFlags = DDPF_FOURCC;
      ddPixelFormat.dwFourCC = FOURCC_YUY2;//mmioFOURCC('Y','U','Y','2');
      ddPixelFormat.dwYUVBitCount = 16;

      ZeroMemory(&ddsd, sizeof(DDSURFACEDESC));
      ddsd.dwSize = sizeof(DDSURFACEDESC);
      ddsd.dwFlags = DDSD_CAPS | DDSD_WIDTH | DDSD_HEIGHT | DDSD_PIXELFORMAT;
      //ddsd.ddsCaps.dwCaps = /*DDSCAPS_BACKBUFFER*/ DDSCAPS_OVERLAY| DDSCAPS_VIDEOMEMORY;//DDSCAPS_OVERLAY | DDSCAPS_VIDEOMEMORY;
      ddsd.ddsCaps.dwCaps = DDSCAPS_OVERLAY| DDSCAPS_SYSTEMMEMORY;

      ddsd.dwWidth = 720;
      ddsd.dwHeight = 480;

      memcpy(&(ddsd.ddpfPixelFormat), &ddPixelFormat, sizeof(DDPIXELFORMAT));
      hr = m_lpDD2->CreateSurface(&ddsd, &m_lpDDSOverlay[0], NULL);
      if (hr==DD_OK)
      {
       printf("创建第2种OVERLAY表面成功 !");
      }
     }
    }
    m_lpDDSPrimary->Release();
    m_lpDDSPrimary=NULL;
   }
   m_lpDD2->Release();
   m_lpDD2=NULL;
  }
  m_lpDD->Release();
  m_lpDD=NULL;
 }
}

在函数void RenderYUY2()中加上:
if (IDirectDrawSurface_Unlock(lpOverlay, 0)==DD_OK)
{
   IDirectDrawSurface_Flip(lpOverlay, NULL, DDFLIP_WAIT);//(新增加)
   ......................
}

则7300LE的显卡颜色正常，但闪烁比较厉害，7600GS能显示了（不知为什么原因）但颜色变成暗红
本想抓屏贴张图给看看效果，overlay方式好象不能抓屏