1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
use super::compress::lit_decompress;
use crate::{
block::Block, frame::Frame, helpers::threading::both_par, refsampler::Sampler, view::View,
};
pub struct DecodeConfig {}
pub fn decode_block(
block: &Block,
mut target: View<&mut Frame>,
prev: View<&Frame>,
config: &DecodeConfig,
) {
match &block {
Block::Literal(pixels) => target.set_pixels(pixels),
Block::Split(box [a, b]) => {
let [a, b] = unsafe { std::mem::transmute::<_, [&'static Block; 2]>([a, b]) };
let [at, bt] = unsafe {
std::mem::transmute::<_, [View<&'static mut Frame>; 2]>(target.split_mut_unsafe())
};
let [ap, bp] =
unsafe { std::mem::transmute::<_, [View<&'static Frame>; 2]>(prev.split()) };
let config = unsafe { std::mem::transmute::<_, &'static DecodeConfig>(config) };
rayon::join(
move || decode_block(a, at, ap, config),
move || decode_block(b, bt, bp, config),
);
}
Block::CompressedLiteral(data) => {
lit_decompress(&data, target);
}
Block::Reference { translation } => target.copy_from(&prev.offset(*translation)),
Block::AdvancedReference(r) => target.copy_from_sampler(&Sampler::from_refblock(prev, r)),
}
}
|
