Function evaluate_with 

pub fn evaluate_with(
    threads: Threads,
    shader: &dyn PixelShader,
    constants: &Constants,
    textures: &Views,
    inputs: &BTreeMap<(String, u32), Input>,
    grid: Grid,
    targets: &[(u32, u8)],
) -> Result<Evaluation, Error>

evaluate on threads threads (evaluate_raw_with, a row of the grid each at a time): the same evaluation on any count.