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|
mod container;
#[cfg(test)]
mod tests;
use std::{
fmt::Debug,
io::{self, Cursor, Write},
};
use azalea_buf::{AzBufVar, BufReadError};
pub use container::*;
/// A representation of the different types of chunk palettes Minecraft uses.
#[derive(Clone, Debug, PartialEq)]
pub enum Palette<S: PalletedContainerKind> {
/// ID of the corresponding entry in its global palette
SingleValue(S),
// in vanilla this keeps a `size` field that might be less than the length, but i'm not sure
// it's actually needed?
Linear(Vec<S>),
Hashmap(Vec<S>),
Global,
}
impl<S: PalletedContainerKind> Palette<S> {
#[inline]
pub fn value_for(&self, id: usize) -> S {
match self {
Palette::SingleValue(v) => *v,
Palette::Linear(v) => v.get(id).copied().unwrap_or_default(),
Palette::Hashmap(v) => v.get(id).copied().unwrap_or_default(),
Palette::Global => S::try_from(id as u32).unwrap_or_default(),
}
}
}
impl<S: PalletedContainerKind> Palette<S> {
pub fn write(&self, buf: &mut impl Write) -> io::Result<()> {
match self {
Palette::SingleValue(value) => {
(*value).into().azalea_write_var(buf)?;
}
Palette::Linear(values) => {
(values.len() as u32).azalea_write_var(buf)?;
for value in values {
(*value).into().azalea_write_var(buf)?;
}
}
Palette::Hashmap(values) => {
(values.len() as u32).azalea_write_var(buf)?;
for value in values {
(*value).into().azalea_write_var(buf)?;
}
}
Palette::Global => {}
}
Ok(())
}
}
impl PaletteKind {
pub fn read<S: PalletedContainerKind>(
&self,
buf: &mut Cursor<&[u8]>,
) -> Result<Palette<S>, BufReadError> {
Ok(match self {
// since they're read as varints it's actually fine to just use BlockStateIntegerRepr
// instead of the correct type (u32)
PaletteKind::SingleValue => {
Palette::SingleValue(S::try_from(u32::azalea_read_var(buf)?).unwrap_or_default())
}
PaletteKind::Linear => Palette::Linear(
Vec::<u32>::azalea_read_var(buf)?
.into_iter()
.map(|v| S::try_from(v).unwrap_or_default())
.collect(),
),
PaletteKind::Hashmap => Palette::Hashmap(
Vec::<u32>::azalea_read_var(buf)?
.into_iter()
.map(|v| S::try_from(v).unwrap_or_default())
.collect(),
),
PaletteKind::Global => Palette::Global,
})
}
pub fn as_empty_palette<S: PalletedContainerKind>(&self) -> Palette<S> {
match self {
PaletteKind::SingleValue => Palette::SingleValue(S::default()),
PaletteKind::Linear => Palette::Linear(Vec::new()),
PaletteKind::Hashmap => Palette::Hashmap(Vec::new()),
PaletteKind::Global => Palette::Global,
}
}
}
impl<S: PalletedContainerKind> From<&Palette<S>> for PaletteKind {
fn from(palette: &Palette<S>) -> Self {
match palette {
Palette::SingleValue(_) => PaletteKind::SingleValue,
Palette::Linear(_) => PaletteKind::Linear,
Palette::Hashmap(_) => PaletteKind::Hashmap,
Palette::Global => PaletteKind::Global,
}
}
}
#[derive(Clone, Debug, Eq, PartialEq)]
pub enum PaletteKind {
SingleValue,
Linear,
Hashmap,
Global,
}
|
