color.rs

use boytacean::color::rgb888_to_rgb1555_scalar;

use criterion::{black_box, criterion_group, criterion_main, Criterion};

fn multiply_array_size<T: Clone>(arr: &[T], multiplier: usize) -> Vec<T> {
    let mut new_arr = Vec::with_capacity(arr.len() * multiplier);
    for _ in 0..multiplier {
        new_arr.extend_from_slice(arr);
    }
    new_arr
}

fn benchmark_rgb_conversion(c: &mut Criterion) {
    let rgb888_pixels: Vec<u8> = vec![255, 0, 0, 0, 255, 0, 0, 0, 255, 255, 255, 0];
    let rgb888_pixels_sized = multiply_array_size(&rgb888_pixels, 16 * 1024);

    let mut rgb1555_pixels: Vec<u8> = vec![0; rgb888_pixels_sized.len() / 3 * 2];

    c.bench_function("rgb888_to_rgb1555_scalar", |b| {
        b.iter(|| {
            rgb888_to_rgb1555_scalar(
                black_box(&rgb888_pixels_sized),
                black_box(&mut rgb1555_pixels),
            )
        })
    });

    #[cfg(feature = "simd")]
    {
        use boytacean::color::rgb888_to_rgb1555_simd;
        c.bench_function("rgb888_to_rgb1555_simd", |b| {
            b.iter(|| {
                rgb888_to_rgb1555_simd(
                    black_box(&rgb888_pixels_sized),
                    black_box(&mut rgb1555_pixels),
                )
            })
        });
    }
}

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