blittle 0.5.1

A fast little blitter
Documentation 
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use crate::convert::PixelConverter;
use crate::{L8Surface, L32Surface, Surface};
use glam::Vec4;

impl<S: AsRef<[[u8; 3]]> + AsMut<[[u8; 3]]>> PixelConverter<[u8; 3]> for Surface<'_, S, [u8; 3]> {
    #[inline]
    fn pixel_to_l8(pixel: &[u8; 3]) -> u8 {
        L32Surface::f32_to_u8(Self::pixel_to_l32(pixel))
    }

    #[inline]
    fn pixel_to_la8(pixel: &[u8; 3]) -> [u8; 2] {
        [Self::pixel_to_l8(pixel), 255]
    }

    #[inline]
    fn pixel_to_l32(pixel: &[u8; 3]) -> f32 {
        Self::grayscale(pixel[0], pixel[1], pixel[2])
    }

    #[inline]
    fn pixel_to_la32(pixel: &[u8; 3]) -> [f32; 2] {
        [Self::pixel_to_l32(pixel), 1.]
    }

    #[inline]
    fn pixel_to_rgb8(pixel: &[u8; 3]) -> [u8; 3] {
        *pixel
    }

    #[inline]
    fn pixel_to_rgba8(pixel: &[u8; 3]) -> [u8; 4] {
        [pixel[0], pixel[1], pixel[2], 255]
    }

    #[inline]
    fn pixel_to_rgba32(pixel: &[u8; 3]) -> Vec4 {
        Vec4::new(
            L8Surface::u8_to_f32(pixel[0]),
            L8Surface::u8_to_f32(pixel[1]),
            L8Surface::u8_to_f32(pixel[2]),
            1.,
        )
    }
}

impl<S: AsRef<[[u8; 3]]> + AsMut<[[u8; 3]]>> Surface<'_, S, [u8; 3]> {
    pub(crate) const fn grayscale(r: u8, g: u8, b: u8) -> f32 {
        (L8Surface::u8_to_f32(r) + L8Surface::u8_to_f32(g) + L8Surface::u8_to_f32(b)) / 3.
    }

    pub const fn pixel_and_alpha_to_rgba32(pixel: &[u8; 3], alpha: f32) -> Vec4 {
        Vec4::new(
            L8Surface::u8_to_f32(pixel[0]),
            L8Surface::u8_to_f32(pixel[1]),
            L8Surface::u8_to_f32(pixel[2]),
            alpha,
        )
    }
}