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use super::*;
use crate::nbt;
use types::Chunk;
pub trait RegionDrawer {
fn draw(&mut self, xc_rel: usize, zc_rel: usize, chunk: &mut Chunk);
}
pub struct RegionMap<T> {
pub data: Vec<T>,
pub x_region: isize,
pub z_region: isize,
}
impl<T: Clone> RegionMap<T> {
pub fn new(x_region: isize, z_region: isize, default: T) -> Self {
let mut data: Vec<T> = Vec::new();
data.resize(16 * 16 * 32 * 32, default);
Self {
data,
x_region,
z_region,
}
}
pub fn chunk_mut(&mut self, x: usize, z: usize) -> &mut [T] {
let len = 16 * 16;
let begin = (x * 32 + z) * len;
&mut self.data[begin..begin + len]
}
pub fn chunk(&self, x: usize, z: usize) -> &[T] {
let len = 16 * 16;
let begin = (x * 32 + z) * len;
&self.data[begin..begin + len]
}
}
pub type Rgb = [u8; 3];
#[derive(Debug)]
pub enum DrawError {
ParseAnvil(super::Error),
ParseNbt(nbt::error::Error),
IO(std::io::Error),
MissingHeightMap,
InvalidPalette,
}
impl From<super::Error> for DrawError {
fn from(err: super::Error) -> DrawError {
DrawError::ParseAnvil(err)
}
}
impl From<crate::nbt::error::Error> for DrawError {
fn from(err: crate::nbt::error::Error) -> DrawError {
DrawError::ParseNbt(err)
}
}
impl From<std::io::Error> for DrawError {
fn from(err: std::io::Error) -> Self {
DrawError::IO(err)
}
}
pub type DrawResult<T> = std::result::Result<T, DrawError>;
pub fn parse_region<F: RegionDrawer + ?Sized>(
mut region: Region<std::fs::File>,
draw_to: &mut F,
) -> DrawResult<()> {
let closure = |x: usize, z: usize, buf: &Vec<u8>| {
let chunk: DrawResult<types::Chunk> = Ok(nbt::de::from_bytes(buf.as_slice()).unwrap());
match chunk {
Ok(mut chunk) => draw_to.draw(x, z, &mut chunk),
Err(DrawError::MissingHeightMap) => {}
Err(e) => panic!(e),
}
};
region.for_each_chunk(closure)?;
Ok(())
}