ref: https://msdn.microsoft.com/en-us/library/windows/desktop/ff476485(v=vs.85).aspx

ref2: https://msdn.microsoft.com/en-us/library/windows/desktop/dn508285(v=vs.85).aspx



In my case, I'd forgot to call 'unmap' method before called 'draw' method.


ID3D11DeviceContext::Unmap method: 

Invalidate the pointer to a resource and reenable the GPU's access to that resource.

Posted by Cat.IanKang
,