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use crate::{
block::{Block, BlockInner},
frame::Frame,
view::View,
};
pub fn encode_block(view: View<&Frame>, prev: View<&Frame>) -> Block {
let diff = View::diff(&view, &prev) / view.area() as f64;
// eprintln!("{:?} {diff}", view.size);
let inner = if diff < 0.9 {
BlockInner::Reference {
translation: (0, 0),
}
} else {
if view.size.0 < 32 {
BlockInner::Literal(view.pixels())
} else {
let [av, bv] = view.split();
let [ap, bp] = prev.split();
let a = encode_block(av, ap);
let b = encode_block(bv, bp);
if a.is_literal() && b.is_literal() {
BlockInner::Literal(view.pixels())
} else {
BlockInner::Split(Box::new([a, b]))
}
}
};
Block {
size: view.size,
inner,
}
}
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