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use glam::{I16Vec2, i16vec2};
use std::{collections::VecDeque, ops::Range};
pub const BLOCK_SIZE: i16 = 4;
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub struct AbsRef {
pub off: I16Vec2,
pub frame: u64,
}
#[derive(Clone)]
pub struct Frame(pub Vec<u8>);
impl Frame {
pub fn new(res: I16Vec2) -> Self {
let res = res.as_usizevec2();
Self(vec![0; res.x * res.y + 2 * (res.x / 2 * res.y / 2)])
}
pub fn index(&self, res: I16Vec2, p: I16Vec2) -> [usize; 3] {
let res = res.as_usizevec2();
let p = p.as_usizevec2();
let ystride = res.y;
let ysize = res.x * ystride;
let uvstride = res.x / 2;
let usize = uvstride * (res.y / 2);
let puv = p / 2;
[
p.x + p.y * ystride,
ysize + puv.x + puv.y * uvstride,
ysize + usize + puv.x + puv.y * uvstride,
]
}
pub fn slice(&self, res: I16Vec2, y: i16, x: Range<i16>) -> [&[u8]; 3] {
let start = self.index(res, i16vec2(x.start, y));
let end = self.index(res, i16vec2(x.end, y));
[
&self.0[start[0]..end[0]],
&self.0[start[1]..end[1]],
&self.0[start[2]..end[2]],
]
}
pub fn get(&self, res: I16Vec2, p: I16Vec2) -> [u8; 3] {
self.index(res, p).map(|i| self.0[i])
}
pub fn export_rect(&self, res: I16Vec2, r: Range<I16Vec2>, out: &mut Vec<u8>) {
for y in r.start.y..r.end.y {
let slices = self.slice(res, y, r.start.x..r.end.x);
out.extend(slices[0]);
out.extend(slices[1]);
out.extend(slices[2]);
}
}
pub fn import_rect(&mut self, res: I16Vec2, r: Range<I16Vec2>, mut data: &[u8]) -> usize {
let mut off = 0;
for y in r.start.y..r.end.y {
let start = self.index(res, i16vec2(r.start.x, y));
let end = self.index(res, i16vec2(r.end.x, y));
let mut do_slice = |s: &mut [u8]| {
s.copy_from_slice(&data[..s.len()]);
data = &data[s.len()..];
off += s.len();
};
do_slice(&mut self.0[start[0]..end[0]]);
do_slice(&mut self.0[start[1]..end[1]]);
do_slice(&mut self.0[start[2]..end[2]]);
}
off
}
}
pub fn frame_to_frame_rect_copy(
res: I16Vec2,
aframe: &mut Frame,
bframe: &Frame,
size: I16Vec2,
aoff: I16Vec2,
boff: I16Vec2,
) {
for y in 0..size.y {
let astart = aframe.index(res, i16vec2(aoff.x, aoff.y + y));
let aend = aframe.index(res, i16vec2(aoff.x + size.x, aoff.y + y));
let bstart = bframe.index(res, i16vec2(boff.x, boff.y + y));
let bend = bframe.index(res, i16vec2(boff.x + size.x, boff.y + y));
aframe.0[astart[0]..aend[0]].copy_from_slice(&bframe.0[bstart[0]..bend[0]]);
aframe.0[astart[1]..aend[1]].copy_from_slice(&bframe.0[bstart[1]..bend[1]]);
aframe.0[astart[2]..aend[2]].copy_from_slice(&bframe.0[bstart[2]..bend[2]]);
}
}
pub struct LastFrames {
pub frame_offset: u64,
pub frames: VecDeque<Frame>,
}
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