Sets the saturation of the image.
HRESULT SetSaturation( IDCompositionAnimation *animation );
An animation that represents how the saturation of the image changes over time. This parameter must not be NULL. You can set the saturation to a value between 0 and 1. If you set it to 1 the output image is fully saturated. If you set it to 0 the output image is monochrome. The saturation value is unitless.
The effect calculates a color matrix based on the saturation value (s in the equation here) using the following equation:
If this method succeeds, it returns S_OK. Otherwise, it returns an HRESULT error code.