use crate::{
    block::{Block, BlockInner},
    frame::Frame,
    view::View,
};

pub fn decode_block(block: &Block, mut target: View<&mut Frame>, prev: View<&Frame>) {
    match &block.inner {
        BlockInner::Literal(pixels) => target.set_pixels(pixels),
        BlockInner::Split(box [a, b]) => {
            let [at, bt] = target.split_mut_unsafe();
            let [ap, bp] = prev.split();
            decode_block(a, at, ap);
            decode_block(b, bt, bp);
        }
        BlockInner::Reference { translation: _ } => target.copy_from(&prev),
    }
}