D3D Extended Formats - BGR and XR_BIAS(节选)

gz_easy

1.1  FORMAT DEFINITIONS AND DDI CHANGES
Several new formats will be defined for the Windows7 versions of d3d10.1 and d3d11, and an existing format family, DXGI_FORMAT_R8G8B8A8_TYPELESS will be given a minor new feature (castability between members). D3D9 will be given a new swapchain flag that allows the XR interpretation of a 10:10:10:2 back buffer to be communicated to the DWM. There are five broad classes of changes listed here:
• New mechanism for discoverability of UMD versions
• New XR formats for high color scanout
• Re-addition of the BGR formats so mistakenly missing from d3d10.
• Enabling creation of differently-formatted views of fully-typed members of DXGI_FORMAT_R8G8B8A8_TYPELESS, DXGI_FORMAT_R10G10B10A2_TYPELESS and DXGI_FORMAT_R16G16B16_A16_TYPELESS, which contain all the d3d10 scan-out formats.
• Scan-out and present support for BGRA and BGRA_SRGB
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1.1.2  New Format Details
In the following table, “XR” can be considered a new shader interpretation of the bits akin to UNORM or SINT. XR_BIAS is a special case that overloads this interpretation semantic with the additional meta-data that the format must be explicitly offset and biased in shader code on transitions into and out of the shader. The driver is not expected to do any of this biasing work- it is left entirely to the application.

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Edison

不错，scan-out 支持这类格式。

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再多一点资料啊。

majjjj

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