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how can I write data to BackBuffer directly?

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LPDIRECT3DSURFACE9 pBackSurface = 0; HRESULT hr = m_pDevice->GetBackBuffer(0,0,D3DBACKBUFFER_TYPE_MONO,&pBackSurface); D3DLOCKED_RECT lr; pBackSurface->LockRect(&lr,0,D3DLOCK_NOSYSLOCK); ... I found I can''t lock BackBuffer.....

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quote:
Original post by Namethatnobodyelsetook
Did you created your device with the "lockablebackbuffer" flag?

d3dpp.Flags = D3DPRESENTFLAG_LOCKABLE_BACKBUFFER ;


thanks 4 your help~
another question is can I write data to frontbuffer directly?

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