hcie-rust-v3.05/hcie-composite/tests/ff_visibility.rs

#![allow(
    dead_code,
    unused_imports,
    unused_variables,
    unused_macros,
    unreachable_patterns
)]
use hcie_composite::composite_layers;
use hcie_protocol::Layer as ProtoLayer;

fn count_opaque(pixels: &[u8]) -> usize {
    pixels.iter().skip(3).step_by(4).filter(|&&a| a > 0).count()
}

fn proto_to_comp(l: &ProtoLayer) -> ProtoLayer {
    l.clone()
}

#[test]
fn test_composite_visibility_from_protocol_layer() {
    let _ = env_logger::try_init();
    let w = 100u32;
    let h = 100u32;

    // Build layers using hcie_protocol::Layer (like Engine does)
    let mut bg = ProtoLayer::new_transparent("bg", w, h);
    bg.id = 1;
    bg.pixels = vec![255u8; (w * h * 4) as usize];

    let mut top = ProtoLayer::new_transparent("top", w, h);
    top.id = 2;
    top.pixels = vec![0u8; (w * h * 4) as usize];
    for y in 20..80 {
        for x in 20..80 {
            let i = (y * w + x) as usize * 4;
            top.pixels[i] = 0;
            top.pixels[i + 1] = 0;
            top.pixels[i + 2] = 0;
            top.pixels[i + 3] = 255;
        }
    }

    let run_composite = |layers: &[ProtoLayer]| -> Vec<u8> { composite_layers(layers, w, h) };

    eprintln!(
        "BOTH VISIBLE: opaque={}/10000",
        count_opaque(&run_composite(&[bg.clone(), top.clone()]))
    );
    bg.visible = false;
    eprintln!(
        "BG HIDDEN: opaque={}/10000 (expect 3600)",
        count_opaque(&run_composite(&[bg.clone(), top.clone()]))
    );
    bg.visible = true;
    top.visible = false;
    eprintln!(
        "TOP HIDDEN: opaque={}/10000 (expect 10000)",
        count_opaque(&run_composite(&[bg.clone(), top.clone()]))
    );
    bg.visible = false;
    top.visible = false;
    eprintln!(
        "BOTH HIDDEN: opaque={}/10000 (expect 0)",
        count_opaque(&run_composite(&[bg.clone(), top.clone()]))
    );
}