use criterion::{black_box, criterion_group, criterion_main, BenchmarkId, Criterion};
use image::{ImageReader, RgbImage};
use pi_frame_server::dither::{DitherMethod, DitheredImage, Palette};

fn criterion_benchmark(c: &mut Criterion) {
    let mut group = c.benchmark_group("dithering_benchmark");

    let sample_file = "sample_0.tiff";
    let image: RgbImage = ImageReader::open(format!("samples/{sample_file}"))
        .expect("file exists")
        .decode()
        .expect("file is valid")
        .into_rgb8();
    group.sample_size(20);

    group.bench_with_input(BenchmarkId::new("dither", "sample_0"), &image, |b, i| {
        b.iter(|| {
            let mut method = DitherMethod::Atkinson.get_ditherer();
            let mut result = DitheredImage::new(
                image.width(),
                image.height(),
                Palette::Default.value().to_vec(),
            );

            method.dither(i, &mut result);
        });
    });
}

criterion_group!(benches, criterion_benchmark);
criterion_main!(benches);