Function gsk_transform_matrix_2d 

pub unsafe extern "C" fn gsk_transform_matrix_2d(
    next: *mut GskTransform,
    xx: c_float,
    yx: c_float,
    xy: c_float,
    yy: c_float,
    dx: c_float,
    dy: c_float,
) -> *mut GskTransform

Available on crate feature v4_20 only.