fn apply_displacement_map(
fe: &DisplacementMap,
region: IntRect,
cs: ColorInterpolation,
ts: Transform,
input1: Image,
input2: Image,
) -> Result<Image, Error>fn apply_displacement_map(
fe: &DisplacementMap,
region: IntRect,
cs: ColorInterpolation,
ts: Transform,
input1: Image,
input2: Image,
) -> Result<Image, Error>