ID2D1Transform.MapInvalidRect

Undocumented in source but is binding to Windows. You might be able to learn more by searching the web for its name.
interface ID2D1Transform
extern (Windows) const
HRESULT
MapInvalidRect
(
UINT32 inputIndex
,
D2D1_RECT_L invalidInputRect
,
D2D1_RECT_L* invalidOutputRect
)

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