D3D Export

 

  
    

   
     
   
      1 
   
     D3DDISPLAYMODE d3ddm;

   
      2 
   
     pD3D9
   
     ->
   
     GetAdapterDisplayMode(D3DADAPTER_DEFAULT, 
   
     &
   
     d3ddm);

   
      3 
   
     IDirect3DSurface9
   
     *
   
      pD3DSurfTemp;

   
      4 
   
     hr 
   
     =
   
      pD3D9Device
   
     ->
   
     CreateOffscreenPlainSurface(m_dwD3DWidth, m_dwD3DHeight, d3ddm.Format, D3DPOOL_SYSTEMMEM, 
   
     &
   
     pD3DSurfTemp, NULL);

   
      5 
   
     hr 
   
     =
   
      pD3DDevice
   
     ->
   
     GetRenderTargetData(m_pRenderTarget, pD3DSurfTemp);

   
      6 
   
     

   
      7 
   
     D3DLOCKED_RECT lockRect 
   
     =
   
      {
   
     0
   
     };

   
      8 
   
      
   
     if
   
      (SUCCEEDED(pD3DSurfTemp
   
     ->
   
     LockRect(
   
     &
   
     lockRect, NULL, 
   
     0
   
     )))

   
      9 
   
     {

   
     10 
   
     ...

   
     11 　　
   
     pD3DSurfTemp
   
     ->
   
     UnlockRect();

   
     12 
   
     }
  
    

 

从离屏缓冲pD3DSurfTemp上Lock数据要比直接从m_pRenderTarget快很多