IDCompositionBrightnessEffect::SetWhitePoint method (dcomp.h)
Sets the upper portion of the brightness transfer curve.
HRESULT SetWhitePoint( [in, ref] const D2D1_VECTOR_2F & whitePoint );
[in, ref] whitePoint
Type: const D2D1_VECTOR_2F
The upper portion of the brightness transfer curve. The white point adjusts the appearance of the brighter portions of the image. This vector is for both the x value and the y value, in that order. Each of the values must be between 0 and 1, inclusive.
If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.