draco-oxide-core 0.1.0-alpha.7

Shared core for draco-oxide: the geometry/attribute data model, numeric primitives, and the compression algorithms shared between the encoder and decoder.
Documentation 
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use crate::bit_coder::ReaderErr;
use crate::bit_coder::{ByteReader, ByteWriter};

pub mod geom;
pub mod portabilization;
pub mod prediction_scheme;
pub mod sequence;

#[derive(thiserror::Error, Debug)]
#[allow(unused)]
pub enum Err {
    #[error("Reader Error: {0}")]
    ReaderError(#[from] ReaderErr),
}

pub trait Portable: Sized {
    fn to_bytes(self) -> Vec<u8>;
    fn write_to<W>(self, writer: &mut W)
    where
        W: ByteWriter;
    fn read_from<R>(reader: &mut R) -> Result<Self, ReaderErr>
    where
        R: ByteReader;
}

impl Portable for bool {
    fn to_bytes(self) -> Vec<u8> {
        vec![self as u8]
    }
    fn write_to<W>(self, writer: &mut W)
    where
        W: ByteWriter,
    {
        writer.write_u8(self as u8);
    }
    fn read_from<R>(reader: &mut R) -> Result<Self, ReaderErr>
    where
        R: ByteReader,
    {
        Ok(reader.read_u8()? != 0)
    }
}

#[cfg(test)]
mod tests {
    use super::Portable;
    use crate::types::NdVector;

    #[test]
    fn from_bits_f32() {
        let data = NdVector::from([1_f32, -1.0, 1.0]);
        let mut buff_writer = Vec::new();
        data.write_to(&mut buff_writer);
        let mut buff_reader = buff_writer.into_iter();
        let dequant_data: NdVector<3, f32> = NdVector::read_from(&mut buff_reader).unwrap();
        assert_eq!(data, dequant_data);
    }

    #[test]
    fn from_bits_f64() {
        let data = NdVector::from([1_f64, -1.0, 1.0]);
        let mut buff_writer = Vec::new();
        data.write_to(&mut buff_writer);
        let mut buff_reader = buff_writer.into_iter();
        let dequant_data: NdVector<3, f64> = NdVector::read_from(&mut buff_reader).unwrap();
        assert_eq!(data, dequant_data);
    }
}