Re: DirectShow on DirectX Surface

From: Austin Harvey (auz_at_splendid-software.co.uk)
Date: 12/10/04 

Date: Fri, 10 Dec 2004 10:38:36 -0000

Anyone have any ideas on this one ? or should I post to a different group ?

Best Regards,

Austin.

> I have a DDSCAPS_PRIMARYSURFACE (m_lpDDSFront->m_lpDDs), and a
> DDSCAPS_OFFSCREENPLAIN background surface (m_lpDDSBack->m_lpDDs), all of
> my graphics (boxes, buttons, images) are loaded into the background
> surface, whenever a graphic is updated the following is called (Flip) ;
>
> Flip()
> {
> RECT Window;
> POINT pt;
>
> GetClientRect((HWND)m_hWnd,&Window);
> pt.x=0;
> pt.y=0;
> ClientToScreen((HWND)m_hWnd,&pt);
> OffsetRect(&Window,pt.x,pt.y);
> m_lpDDSFront->m_lpDDS->Blt(&Window,m_lpDDSBack->m_lpDDS,NULL,DDBLT_WAIT,NULL);
> }
>
> When creating the DirectShow graph (with capture filter) I add a VMR, then
> call all the usual as follows ;
>
> SetRenderingMode(VMRMode_Windowless);
> SetVideoClippingWindow(m_hwnd);
> SetVideoPosition(&rcSrc, &rcDest);
>
> The graph is run and I display my screen, with graphics. The live video
> displays fine until I do a 'Flip()' at which point the video turns black
> then re-appears.
>
> Should I create another surface for the video window, and use some of the
> VMR functions to pass it the surfaces to use.
>
> Thanks in advance.
>
> Best Regards,
>
> Austin.
>