Function msfs::sys::nvgBoxGradient

pub unsafe extern "C" fn nvgBoxGradient(
    ctx: *mut NVGcontext,
    x: f32,
    y: f32,
    w: f32,
    h: f32,
    r: f32,
    f: f32,
    icol: NVGcolor,
    ocol: NVGcolor
) -> NVGpaint