不支持,参考文档
http://msdn.microsoft.com/en-us/library/windows/desktop/bb173059(v=vs.85).aspx
DXGI_FORMAT_B5G6R5_UNORM
A three-component, 16-bit unsigned-normalized-integer format that supports 5 bits for blue, 6 bits for green, and 5 bits for red.
- Direct3D 10 through Direct3D 11: This value is defined for DXGI. However, Direct3D 10, 10.1, or 11 devices do not support this format.
- Direct3D 11.1: This value is not supported until Windows 8.
Bob Bao [MSFT]
MSDN Community Support | Feedback to us
